diff --git a/Application/AppController.m b/Application/AppController.m
index b8bcc763f..109b4667d 100644
--- a/Application/AppController.m
+++ b/Application/AppController.m
@@ -466,6 +466,8 @@ void* kAppControllerContext = &kAppControllerContext;
 
     [userDefaultsValuesDict setObject:@"cubic" forKey:@"resampling"];
     
+    [userDefaultsValuesDict setObject:@"normal" forKey:@"outputResampling"];
+    
     [userDefaultsValuesDict setObject:[NSNumber numberWithInteger:CogStatusStopped] forKey:@"lastPlaybackStatus"];
     [userDefaultsValuesDict setObject:[NSNumber numberWithInteger:-1] forKey:@"lastTrackPlaying"];
     [userDefaultsValuesDict setObject:[NSNumber numberWithDouble:0] forKey:@"lastTrackPosition"];
diff --git a/Audio/AudioPlayer.m b/Audio/AudioPlayer.m
index 75ce0b081..77c4732bc 100644
--- a/Audio/AudioPlayer.m
+++ b/Audio/AudioPlayer.m
@@ -60,9 +60,6 @@
 
 - (void)play:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi startPaused:(BOOL)paused andSeekTo:(double)time
 {
-    if (output) {
-        [output close];
-    }
 	@synchronized(chainQueue) {
         for (id anObject in chainQueue)
 		{
@@ -240,7 +237,6 @@
 {
 	//Need to reset everything's buffers, and then seek?
 	/*HACK TO TEST HOW WELL THIS WOULD WORK*/
-    [self play:[[bufferChain inputNode] stealDecoder] startPaused:paused];
 	[output seek:time];
 	[bufferChain seek:time];
 	/*END HACK*/
diff --git a/Audio/Chain/ConverterNode.h b/Audio/Chain/ConverterNode.h
index 21170933a..12042e102 100644
--- a/Audio/Chain/ConverterNode.h
+++ b/Audio/Chain/ConverterNode.h
@@ -12,32 +12,41 @@
 #import <AudioToolbox/AudioToolbox.h>
 #import <AudioUnit/AudioUnit.h>
 
+#import <audio/audio_resampler.h>
+
 #import "Node.h"
 
 @interface ConverterNode : Node {
     NSDictionary * rgInfo;
+    
+    void *resampler_data;
+    const retro_resampler_t *resampler;
 
-	AudioConverterRef converter;
-    AudioConverterRef converterFloat;
-	void *callbackBuffer;
-    size_t callbackBufferSize;
+    void *inputBuffer;
+    size_t inputBufferSize;
+    size_t inpSize, inpOffset;
     
     BOOL stopping;
     BOOL convertEntered;
-    BOOL ACInputEntered;
-    BOOL ACFloatEntered;
+    BOOL emittingSilence;
     
-    float sampleRatio;
+    BOOL skipResampler;
+    
+    ssize_t latencyStarted;
+    size_t latencyEaten;
+    BOOL latencyPostfill;
+    
+    double sampleRatio;
     
     float volumeScale;
     
     void *floatBuffer;
     size_t floatBufferSize;
-    int floatSize, floatOffset;
+    size_t floatSize, floatOffset;
 	
 	AudioStreamBasicDescription inputFormat;
     AudioStreamBasicDescription floatFormat;
-    AudioStreamBasicDescription dmFloatFormat; // downmixed float format
+    AudioStreamBasicDescription dmFloatFormat; // downmixed/upmixed float format
 	AudioStreamBasicDescription outputFormat;
 }
 
diff --git a/Audio/Chain/ConverterNode.m b/Audio/Chain/ConverterNode.m
index 8ab4b4d24..abfc126ca 100644
--- a/Audio/Chain/ConverterNode.m
+++ b/Audio/Chain/ConverterNode.m
@@ -10,6 +10,9 @@
 
 #import "Logging.h"
 
+#import <audio/conversion/s16_to_float.h>
+#import <audio/conversion/s32_to_float.h>
+
 void PrintStreamDesc (AudioStreamBasicDescription *inDesc)
 {
 	if (!inDesc) {
@@ -37,19 +40,25 @@ void PrintStreamDesc (AudioStreamBasicDescription *inDesc)
     {
         rgInfo = nil;
         
-        converterFloat = NULL;
-        converter = NULL;
+        resampler = NULL;
+        resampler_data = NULL;
+        inputBuffer = NULL;
+        inputBufferSize = 0;
         floatBuffer = NULL;
         floatBufferSize = 0;
-        callbackBuffer = NULL;
-        callbackBufferSize = 0;
         
         stopping = NO;
         convertEntered = NO;
-        ACInputEntered = NO;
-        ACFloatEntered = NO;
+        emittingSilence = NO;
+        
+        skipResampler = NO;
+        
+        latencyStarted = -1;
+        latencyEaten = 0;
+        latencyPostfill = NO;
 
         [[NSUserDefaultsController sharedUserDefaultsController] addObserver:self forKeyPath:@"values.volumeScaling"		options:0 context:nil];
+        [[NSUserDefaultsController sharedUserDefaultsController] addObserver:self forKeyPath:@"values.outputResampling" options:0 context:nil];
     }
     
     return self;
@@ -86,10 +95,10 @@ static const float STEREO_DOWNMIX[8-2][8][2]={
     }
 };
 
-static void downmix_to_stereo(float * buffer, int channels, int count)
+static void downmix_to_stereo(float * buffer, int channels, size_t count)
 {
     if (channels >= 3 && channels <= 8)
-    for (int i = 0; i < count; ++i)
+    for (size_t i = 0; i < count; ++i)
     {
         float left = 0, right = 0;
         for (int j = 0; j < channels; ++j)
@@ -102,7 +111,7 @@ static void downmix_to_stereo(float * buffer, int channels, int count)
     }
 }
 
-static void downmix_to_mono(float * buffer, int channels, int count)
+static void downmix_to_mono(float * buffer, int channels, size_t count)
 {
     if (channels >= 3 && channels <= 8)
     {
@@ -110,7 +119,7 @@ static void downmix_to_mono(float * buffer, int channels, int count)
         channels = 2;
     }
     float invchannels = 1.0 / (float)channels;
-    for (int i = 0; i < count; ++i)
+    for (size_t i = 0; i < count; ++i)
     {
         float sample = 0;
         for (int j = 0; j < channels; ++j)
@@ -121,9 +130,9 @@ static void downmix_to_mono(float * buffer, int channels, int count)
     }
 }
 
-static void upmix(float * buffer, int inchannels, int outchannels, int count)
+static void upmix(float * buffer, int inchannels, int outchannels, size_t count)
 {
-    for (int i = count - 1; i >= 0; --i)
+    for (ssize_t i = count - 1; i >= 0; --i)
     {
         if (inchannels == 1 && outchannels == 2)
         {
@@ -231,105 +240,105 @@ static void upmix(float * buffer, int inchannels, int outchannels, int count)
     }
 }
 
-static void scale_by_volume(float * buffer, int count, float volume)
+static void scale_by_volume(float * buffer, size_t count, float volume)
 {
     if ( volume != 1.0 )
-        for (int i = 0; i < count; ++i )
+        for (size_t i = 0; i < count; ++i )
             buffer[i] *= volume;
 }
 
-//called from the complexfill when the audio is converted...good clean fun
-static OSStatus ACInputProc(AudioConverterRef inAudioConverter,
-                            UInt32* ioNumberDataPackets,
-                            AudioBufferList* ioData,
-                            AudioStreamPacketDescription** outDataPacketDescription,
-                            void* inUserData)
+static void convert_u8_to_s16(int16_t *output, uint8_t *input, size_t count)
 {
-	ConverterNode *converter = (__bridge ConverterNode *)inUserData;
-	OSStatus err = noErr;
-	int amountToWrite;
-	int amountRead;
-    
-	if (converter->stopping || [converter shouldContinue] == NO || [converter endOfStream] == YES)
-	{
-		ioData->mBuffers[0].mDataByteSize = 0; 
-		*ioNumberDataPackets = 0;
-
-		return noErr;
-	}
-    
-    converter->ACInputEntered = YES;
-	
-	amountToWrite = (*ioNumberDataPackets)*(converter->inputFormat.mBytesPerPacket);
-
-    if (!converter->callbackBuffer || converter->callbackBufferSize < amountToWrite)
-        converter->callbackBuffer = realloc(converter->callbackBuffer, converter->callbackBufferSize = amountToWrite + 1024);
-
-	amountRead = [converter readData:converter->callbackBuffer amount:amountToWrite];
-	if (amountRead == 0 && [converter endOfStream] == NO)
-	{
-		ioData->mBuffers[0].mDataByteSize = 0; 
-		*ioNumberDataPackets = 0;
-        
-        converter->ACInputEntered = NO;
-		
-		return 100; //Keep asking for data
-	}
-    
-	ioData->mBuffers[0].mData = converter->callbackBuffer;
-	ioData->mBuffers[0].mDataByteSize = amountRead;
-	ioData->mBuffers[0].mNumberChannels = (converter->inputFormat.mChannelsPerFrame);
-	ioData->mNumberBuffers = 1;
-
-    converter->ACInputEntered = NO;
-    
-	return err;
+    for (size_t i = 0; i < count; ++i )
+    {
+        uint16_t sample = (input[i] << 8) | input[i];
+        sample ^= 0x8080;
+        output[i] = (int16_t)(sample);
+    }
 }
 
-static OSStatus ACFloatProc(AudioConverterRef inAudioConverter,
-                            UInt32* ioNumberDataPackets,
-                            AudioBufferList* ioData,
-                            AudioStreamPacketDescription** outDataPacketDescription,
-                            void* inUserData)
+static void convert_s8_to_s16(int16_t *output, uint8_t *input, size_t count)
 {
-	ConverterNode *converter = (__bridge ConverterNode *)inUserData;
-	OSStatus err = noErr;
-	int amountToWrite;
-	
-	if (converter->stopping || [converter shouldContinue] == NO)
-	{
-		ioData->mBuffers[0].mDataByteSize = 0;
-		*ioNumberDataPackets = 0;
-        
-		return noErr;
-	}
-    
-    converter->ACFloatEntered = YES;
-	
-    amountToWrite = (*ioNumberDataPackets) * (converter->dmFloatFormat.mBytesPerPacket);
+    for (size_t i = 0; i < count; ++i )
+    {
+        uint16_t sample = (input[i] << 8) | input[i];
+        output[i] = (int16_t)(sample);
+    }
+}
 
-    if ( amountToWrite + converter->floatOffset > converter->floatSize )
+static void convert_u16_to_s16(int16_t *buffer, size_t count)
+{
+    for (size_t i = 0; i < count; ++i )
     {
-        amountToWrite = converter->floatSize - converter->floatOffset;
-        *ioNumberDataPackets = amountToWrite / (converter->dmFloatFormat.mBytesPerPacket);
+        buffer[i] ^= 0x8000;
     }
-    
-	ioData->mBuffers[0].mData = converter->floatBuffer + converter->floatOffset;
-	ioData->mBuffers[0].mDataByteSize = amountToWrite;
-	ioData->mBuffers[0].mNumberChannels = (converter->dmFloatFormat.mChannelsPerFrame);
-	ioData->mNumberBuffers = 1;
-    
-    if (amountToWrite == 0)
+}
+
+static void convert_s24_to_s32(int32_t *output, uint8_t *input, size_t count)
+{
+    for (size_t i = 0; i < count; ++i )
     {
-        converter->ACFloatEntered = NO;
-        return 100;
+        int32_t sample = (input[i * 3] << 8) | (input[i * 3 + 1] << 16) | (input[i * 3 + 2] << 24);
+        output[i] = sample;
+    }
+}
+
+static void convert_u24_to_s32(int32_t *output, uint8_t *input, size_t count)
+{
+    for (size_t i = 0; i < count; ++i )
+    {
+        int32_t sample = (input[i * 3] << 8) | (input[i * 3 + 1] << 16) | (input[i * 3 + 2] << 24);
+        output[i] = sample ^ 0x80000000;
+    }
+}
+
+static void convert_u32_to_s32(int32_t *buffer, size_t count)
+{
+    for (size_t i = 0; i < count; ++i )
+    {
+        buffer[i] ^= 0x80000000;
+    }
+}
+
+static void convert_be_to_le(uint8_t *buffer, size_t bitsPerSample, size_t bytes)
+{
+    size_t i;
+    uint8_t temp;
+    bitsPerSample = (bitsPerSample + 7) / 8;
+    switch (bitsPerSample) {
+        case 2:
+            for (i = 0; i < bytes; i += 2)
+            {
+                temp = buffer[1];
+                buffer[1] = buffer[0];
+                buffer[0] = temp;
+                buffer += 2;
+            }
+            break;
+            
+        case 3:
+            for (i = 0; i < bytes; i += 3)
+            {
+                temp = buffer[2];
+                buffer[2] = buffer[0];
+                buffer[0] = temp;
+                buffer += 3;
+            }
+            break;
+            
+        case 4:
+            for (i = 0; i < bytes; i += 4)
+            {
+                temp = buffer[3];
+                buffer[3] = buffer[0];
+                buffer[0] = temp;
+                temp = buffer[2];
+                buffer[2] = buffer[1];
+                buffer[1] = temp;
+                buffer += 4;
+            }
+            break;
     }
-	
-    converter->floatOffset += amountToWrite;
-    
-    converter->ACFloatEntered = NO;
-    
-	return err;
 }
 
 -(void)process
@@ -345,18 +354,22 @@ static OSStatus ACFloatProc(AudioConverterRef inAudioConverter,
 
 - (int)convert:(void *)dest amount:(int)amount
 {	
-	AudioBufferList ioData;
 	UInt32 ioNumberPackets;
-	OSStatus err;
     int amountReadFromFC;
     int amountRead = 0;
     
+    if (emittingSilence)
+    {
+        memset(dest, 0, amount);
+        return amount;
+    }
+    
     if (stopping)
         return 0;
     
     convertEntered = YES;
     
-tryagain2:
+tryagain:
     if (stopping || [self shouldContinue] == NO)
     {
         convertEntered = NO;
@@ -364,52 +377,196 @@ tryagain2:
     }
     
     amountReadFromFC = 0;
-	
-    if (floatOffset == floatSize) {
-        UInt32 ioWantedNumberPackets;
+    
+    while (inpOffset == inpSize) {
+        size_t samplesRead = 0;
         
-        ioNumberPackets = amount / outputFormat.mBytesPerPacket;
+        // Approximately the most we want on input
+        ioNumberPackets = (amount - amountRead) / outputFormat.mBytesPerPacket;
+        
+        size_t newSize = ioNumberPackets * floatFormat.mBytesPerPacket;
+        if (!inputBuffer || inputBufferSize < newSize)
+            inputBuffer = realloc( inputBuffer, inputBufferSize = newSize * 3 );
+        
+        if (stopping || [self shouldContinue] == NO || [self endOfStream] == YES)
+        {
+            if (!skipResampler && !latencyPostfill)
+            {
+                ioNumberPackets = (int)resampler->latency(resampler_data);
+                newSize = ioNumberPackets * floatFormat.mBytesPerPacket;
+                if (!inputBuffer || inputBufferSize < newSize)
+                    inputBuffer = realloc( inputBuffer, inputBufferSize = newSize * 64);
+                
+                inpSize = newSize;
+                inpOffset = 0;
+                latencyPostfill = YES;
+                break;
+            }
+            else
+            {
+                convertEntered = NO;
+                return amountRead;
+            }
+        }
+
+        size_t amountToWrite = ioNumberPackets * inputFormat.mBytesPerPacket;
+        size_t amountToSkip = 0;
+        
+        if (!skipResampler)
+        {
+            if (latencyStarted < 0)
+            {
+                latencyStarted = resampler->latency(resampler_data);
+            }
+
+            if (latencyStarted)
+            {
+                size_t latencyToWrite = latencyStarted * inputFormat.mBytesPerPacket;
+                if (latencyToWrite > amountToWrite)
+                    latencyToWrite = amountToWrite;
+            
+                if (inputFormat.mBitsPerChannel <= 8)
+                    memset(inputBuffer, 0x80, latencyToWrite);
+                else
+                    memset(inputBuffer, 0, latencyToWrite);
+
+                amountToSkip = latencyToWrite;
+                amountToWrite -= amountToSkip;
+
+                latencyEaten = latencyStarted * sampleRatio;
+
+                latencyStarted -= latencyToWrite / inputFormat.mBytesPerPacket;
+            }
+        }
+                
+        size_t bytesReadFromInput = [self readData:inputBuffer + amountToSkip amount:(int)amountToWrite] + amountToSkip;
+        
+        if (bytesReadFromInput &&
+            (inputFormat.mFormatFlags & kAudioFormatFlagIsBigEndian))
+        {
+            // Time for endian swap!
+            convert_be_to_le(inputBuffer, inputFormat.mBitsPerChannel, bytesReadFromInput);
+        }
+        
+        if (bytesReadFromInput &&
+            !(inputFormat.mFormatFlags & kAudioFormatFlagIsFloat))
+        {
+            size_t bitsPerSample = inputFormat.mBitsPerChannel;
+            BOOL isUnsigned = !(inputFormat.mFormatFlags & kAudioFormatFlagIsSignedInteger);
+            BOOL isFloat = NO;
+            if (bitsPerSample <= 8) {
+                samplesRead = bytesReadFromInput;
+                if (isUnsigned)
+                    convert_s8_to_s16(inputBuffer + bytesReadFromInput, inputBuffer, samplesRead);
+                else
+                    convert_u8_to_s16(inputBuffer + bytesReadFromInput, inputBuffer, samplesRead);
+                memmove(inputBuffer, inputBuffer + bytesReadFromInput, samplesRead * 2);
+                bitsPerSample = 16;
+                bytesReadFromInput = samplesRead * 2;
+                isUnsigned = NO;
+            }
+            if (bitsPerSample <= 16) {
+                samplesRead = bytesReadFromInput / 2;
+                if (isUnsigned)
+                    convert_u16_to_s16(inputBuffer, samplesRead);
+                convert_s16_to_float(inputBuffer + bytesReadFromInput, inputBuffer, samplesRead, 1.0);
+                memmove(inputBuffer, inputBuffer + bytesReadFromInput, samplesRead * sizeof(float));
+                bitsPerSample = 32;
+                bytesReadFromInput = samplesRead * sizeof(float);
+                isUnsigned = NO;
+                isFloat = YES;
+            }
+            else if (bitsPerSample <= 24) {
+                samplesRead = bytesReadFromInput / 3;
+                if (isUnsigned)
+                    convert_u24_to_s32(inputBuffer + bytesReadFromInput, inputBuffer, samplesRead);
+                else
+                    convert_s24_to_s32(inputBuffer + bytesReadFromInput, inputBuffer, samplesRead);
+                memmove(inputBuffer, inputBuffer + bytesReadFromInput, samplesRead * 4);
+                bitsPerSample = 32;
+                bytesReadFromInput = samplesRead * 4;
+                isUnsigned = NO;
+            }
+            if (!isFloat && bitsPerSample <= 32) {
+                samplesRead = bytesReadFromInput / 4;
+                if (isUnsigned)
+                    convert_u32_to_s32(inputBuffer, samplesRead);
+                convert_s32_to_float(inputBuffer + bytesReadFromInput, inputBuffer, samplesRead, 1.0);
+                memmove(inputBuffer, inputBuffer + bytesReadFromInput, samplesRead * sizeof(float));
+                bitsPerSample = 32;
+                bytesReadFromInput = samplesRead * sizeof(float);
+                isUnsigned = NO;
+                isFloat = YES;
+            }
+        }
+        
+        // Input now contains bytesReadFromInput worth of floats, in the input sample rate
+        inpSize = bytesReadFromInput;
+        inpOffset = 0;
+    }
+    
+    if (floatOffset == floatSize)
+    {
+        struct resampler_data src_data;
+        
+        size_t inputSamples = (inpSize - inpOffset) / floatFormat.mBytesPerPacket;
+        
+        ioNumberPackets = (UInt32)inputSamples;
         
         ioNumberPackets = (UInt32)((float)ioNumberPackets * sampleRatio);
         ioNumberPackets = (ioNumberPackets + 255) & ~255;
         
-        ioWantedNumberPackets = ioNumberPackets;
-        
         size_t newSize = ioNumberPackets * floatFormat.mBytesPerPacket;
         if (newSize < (ioNumberPackets * dmFloatFormat.mBytesPerPacket))
             newSize = ioNumberPackets * dmFloatFormat.mBytesPerPacket;
         if (!floatBuffer || floatBufferSize < newSize)
-            floatBuffer = realloc( floatBuffer, floatBufferSize = newSize + 1024 );
-        ioData.mBuffers[0].mData = floatBuffer;
-        ioData.mBuffers[0].mDataByteSize = ioNumberPackets * floatFormat.mBytesPerPacket;
-        ioData.mBuffers[0].mNumberChannels = floatFormat.mChannelsPerFrame;
-        ioData.mNumberBuffers = 1;
-            
-    tryagain:
+            floatBuffer = realloc( floatBuffer, floatBufferSize = newSize * 3 );
+        
         if (stopping)
         {
             convertEntered = NO;
             return 0;
         }
+
+        src_data.data_out      = floatBuffer;
+        src_data.output_frames = 0;
         
-        err = AudioConverterFillComplexBuffer(converterFloat, ACInputProc, (__bridge void * _Nullable)(self), &ioNumberPackets, &ioData, NULL);
-        amountReadFromFC += ioNumberPackets * floatFormat.mBytesPerPacket;
-        if (err == 100)
+        src_data.data_in       = (float*)(((uint8_t*)inputBuffer) + inpOffset);
+        src_data.input_frames  = inputSamples;
+        
+        src_data.ratio         = sampleRatio;
+        
+        if (!skipResampler)
         {
-            ioData.mBuffers[0].mData = (void *)(((uint8_t*)floatBuffer) + amountReadFromFC);
-            ioNumberPackets = ioWantedNumberPackets - ioNumberPackets;
-            ioWantedNumberPackets = ioNumberPackets;
-            ioData.mBuffers[0].mDataByteSize = ioNumberPackets * floatFormat.mBytesPerPacket;
-            usleep(10000);
-            goto tryagain;
+            resampler->process(resampler_data, &src_data);
         }
-        else if (err != noErr && err != kAudioConverterErr_InvalidInputSize)
+        else
         {
-            DLog(@"Error: %i", err);
-            convertEntered = NO;
-            return amountRead;
+            memcpy(src_data.data_out, src_data.data_in, inputSamples * floatFormat.mBytesPerPacket);
+            src_data.output_frames = inputSamples;
         }
         
+        inpOffset += inputSamples * floatFormat.mBytesPerPacket;
+        
+        if (!skipResampler && latencyEaten)
+        {
+            if (src_data.output_frames > latencyEaten)
+            {
+                src_data.output_frames -= latencyEaten;
+                memmove(src_data.data_out, src_data.data_out + latencyEaten * inputFormat.mChannelsPerFrame, src_data.output_frames * floatFormat.mBytesPerPacket);
+                latencyEaten = 0;
+            }
+            else
+            {
+                latencyEaten -= src_data.output_frames;
+                src_data.output_frames = 0;
+            }
+        }
+        
+        amountReadFromFC = (int)(src_data.output_frames * floatFormat.mBytesPerPacket);
+        
+        scale_by_volume( (float*) floatBuffer, amountReadFromFC / sizeof(float), volumeScale);
+        
         if ( inputFormat.mChannelsPerFrame > 2 && outputFormat.mChannelsPerFrame == 2 )
         {
             int samples = amountReadFromFC / floatFormat.mBytesPerFrame;
@@ -429,41 +586,22 @@ tryagain2:
             amountReadFromFC = samples * sizeof(float) * outputFormat.mChannelsPerFrame;
         }
         
-        scale_by_volume( (float*) floatBuffer, amountReadFromFC / sizeof(float), volumeScale);
-        
         floatSize = amountReadFromFC;
         floatOffset = 0;
     }
-
-    ioNumberPackets = amount / outputFormat.mBytesPerPacket;
-    ioData.mBuffers[0].mData = dest + amountRead;
-    ioData.mBuffers[0].mDataByteSize = amount - amountRead;
-    ioData.mBuffers[0].mNumberChannels = outputFormat.mChannelsPerFrame;
-    ioData.mNumberBuffers = 1;
-
-    if (stopping)
-    {
-        convertEntered = NO;
-        return 0;
-    }
     
-    err = AudioConverterFillComplexBuffer(converter, ACFloatProc, (__bridge void *)(self), &ioNumberPackets, &ioData, NULL);
-    amountRead += ioNumberPackets * outputFormat.mBytesPerPacket;
-    if (err == 100)
-    {
-        if ([self endOfStream] == YES)
-        {
-            convertEntered = NO;
-            return amountRead;
-        }
-        
-        goto tryagain2;
-    }
-    else if (err != noErr && err != kAudioConverterErr_InvalidInputSize)
-    {
-        DLog(@"Error: %i", err);
-    }
+    if (floatOffset == floatSize)
+        goto tryagain;
 
+    ioNumberPackets = (amount - amountRead);
+    if (ioNumberPackets > (floatSize - floatOffset))
+        ioNumberPackets = (UInt32)(floatSize - floatOffset);
+    
+    memcpy(dest + amountRead, floatBuffer + floatOffset, ioNumberPackets);
+    
+    floatOffset += ioNumberPackets;
+    amountRead += ioNumberPackets;
+    
     convertEntered = NO;
 	return amountRead;
 }
@@ -478,6 +616,11 @@ tryagain2:
         //User reset the volume scaling option
         [self refreshVolumeScaling];
     }
+    else if ([keyPath isEqual:@"values.outputResampling"]) {
+        // Reset resampler
+        if (resampler && resampler_data)
+            [self inputFormatDidChange:inputFormat];
+    }
 }
 
 static float db_to_scale(float db)
@@ -532,89 +675,73 @@ static float db_to_scale(float db)
 - (BOOL)setupWithInputFormat:(AudioStreamBasicDescription)inf outputFormat:(AudioStreamBasicDescription)outf
 {
 	//Make the converter
-	OSStatus stat = noErr;
-    
-    stopping = NO;
-    convertEntered = NO;
-    ACInputEntered = NO;
-    ACFloatEntered = NO;
-	
 	inputFormat = inf;
 	outputFormat = outf;
     
+    // These are really placeholders, as we're doing everything internally now
+    
     floatFormat = inputFormat;
     floatFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
     floatFormat.mBitsPerChannel = 32;
     floatFormat.mBytesPerFrame = (32/8)*floatFormat.mChannelsPerFrame;
     floatFormat.mBytesPerPacket = floatFormat.mBytesPerFrame * floatFormat.mFramesPerPacket;
     
+    inpOffset = 0;
+    inpSize = 0;
+    
     floatOffset = 0;
     floatSize = 0;
     
-    stat = AudioConverterNew( &inputFormat, &floatFormat, &converterFloat );
-    if (stat != noErr)
-    {
-        ALog(@"Error creating converter %i", stat);
-        return NO;
-    }
+    // This is a post resampler, post-down/upmix format
     
     dmFloatFormat = floatFormat;
+    dmFloatFormat.mSampleRate = outputFormat.mSampleRate;
     dmFloatFormat.mChannelsPerFrame = outputFormat.mChannelsPerFrame;
     dmFloatFormat.mBytesPerFrame = (32/8)*dmFloatFormat.mChannelsPerFrame;
     dmFloatFormat.mBytesPerPacket = dmFloatFormat.mBytesPerFrame * floatFormat.mFramesPerPacket;
-    
-    stat = AudioConverterNew ( &dmFloatFormat, &outputFormat, &converter );
-    if (stat != noErr)
-    {
-        ALog(@"Error creating converter %i", stat);
-        return NO;
-    }
 
-#if 0
-    // These mappings don't do what I want, so avoid them.
-    if (inputFormat.mChannelsPerFrame > 2 && outputFormat.mChannelsPerFrame == 2)
+    convert_s16_to_float_init_simd();
+    convert_s32_to_float_init_simd();
+    
+    skipResampler = outputFormat.mSampleRate == inputFormat.mSampleRate;
+    
+    sampleRatio = (double)outputFormat.mSampleRate / (double)inputFormat.mSampleRate;
+    
+    if (!skipResampler)
     {
-        SInt32 channelMap[2] = { 0, 1 };
+        enum resampler_quality quality = RESAMPLER_QUALITY_DONTCARE;
         
-		stat = AudioConverterSetProperty(converter,kAudioConverterChannelMap,sizeof(channelMap),channelMap);
-		if (stat != noErr)
-		{
-			ALog(@"Error mapping channels %i", stat);
-            return NO;
-		}
-    }
-    else if (inputFormat.mChannelsPerFrame > 1 && outputFormat.mChannelsPerFrame == 1)
-    {
-        SInt32 channelMap[1] = { 0 };
+        NSString * resampling = [[NSUserDefaults standardUserDefaults] stringForKey:@"outputResampling"];
+        if ([resampling isEqualToString:@"lowest"])
+            quality = RESAMPLER_QUALITY_LOWEST;
+        else if ([resampling isEqualToString:@"lower"])
+            quality = RESAMPLER_QUALITY_LOWER;
+        else if ([resampling isEqualToString:@"normal"])
+            quality = RESAMPLER_QUALITY_NORMAL;
+        else if ([resampling isEqualToString:@"higher"])
+            quality = RESAMPLER_QUALITY_HIGHER;
+        else if ([resampling isEqualToString:@"highest"])
+            quality = RESAMPLER_QUALITY_HIGHEST;
         
-        stat = AudioConverterSetProperty(converter,kAudioConverterChannelMap,(int)sizeof(channelMap),channelMap);
-        if (stat != noErr)
+        if (!retro_resampler_realloc(&resampler_data, &resampler, "sinc", quality, inputFormat.mChannelsPerFrame, sampleRatio))
         {
-            ALog(@"Error mapping channels %i", stat);
             return NO;
         }
+    
+        latencyStarted = -1;
+        latencyEaten = 0;
+        latencyPostfill = NO;
     }
-	else if (inputFormat.mChannelsPerFrame == 1 && outputFormat.mChannelsPerFrame > 1)
-	{
-		SInt32 channelMap[outputFormat.mChannelsPerFrame];
-        
-        memset(channelMap, 0, sizeof(channelMap));
-		
-		stat = AudioConverterSetProperty(converter,kAudioConverterChannelMap,(int)sizeof(channelMap),channelMap);
-		if (stat != noErr)
-		{
-			ALog(@"Error mapping channels %i", stat);
-            return NO;
-		}	
-	}
-#endif
 
 	PrintStreamDesc(&inf);
 	PrintStreamDesc(&outf);
 
     [self refreshVolumeScaling];
     
-    sampleRatio = (float)inputFormat.mSampleRate / (float)outputFormat.mSampleRate;
+    // Move this here so process call isn't running the resampler until it's allocated
+    stopping = NO;
+    convertEntered = NO;
+    emittingSilence = NO;
     
 	return YES;
 }
@@ -624,6 +751,7 @@ static float db_to_scale(float db)
 	DLog(@"Decoder dealloc");
 
     [[NSUserDefaultsController sharedUserDefaultsController] removeObserver:self forKeyPath:@"values.volumeScaling"];
+    [[NSUserDefaultsController sharedUserDefaultsController] removeObserver:self forKeyPath:@"values.outputResampling"];
     
 	[self cleanUp];
 }
@@ -638,6 +766,7 @@ static float db_to_scale(float db)
 - (void)inputFormatDidChange:(AudioStreamBasicDescription)format
 {
 	DLog(@"FORMAT CHANGED");
+    emittingSilence = YES;
 	[self cleanUp];
 	[self setupWithInputFormat:format outputFormat:outputFormat];
 }
@@ -652,30 +781,26 @@ static float db_to_scale(float db)
 - (void)cleanUp
 {
     stopping = YES;
-    while (convertEntered || ACInputEntered || ACFloatEntered)
+    while (convertEntered)
     {
         usleep(500);
     }
-    if (converterFloat)
+    if (resampler && resampler_data)
     {
-        AudioConverterDispose(converterFloat);
-        converterFloat = NULL;
+        resampler->free(resampler_data);
+        resampler = NULL;
+        resampler_data = NULL;
     }
-	if (converter)
-	{
-		AudioConverterDispose(converter);
-		converter = NULL;
-	}
     if (floatBuffer)
     {
         free(floatBuffer);
         floatBuffer = NULL;
         floatBufferSize = 0;
     }
-	if (callbackBuffer) {
-		free(callbackBuffer);
-		callbackBuffer = NULL;
-        callbackBufferSize = 0;
+	if (inputBuffer) {
+		free(inputBuffer);
+		inputBuffer = NULL;
+        inputBufferSize = 0;
 	}
     floatOffset = 0;
     floatSize = 0;
diff --git a/Audio/Chain/InputNode.h b/Audio/Chain/InputNode.h
index 9ad81837f..d54d7fe42 100644
--- a/Audio/Chain/InputNode.h
+++ b/Audio/Chain/InputNode.h
@@ -36,8 +36,6 @@
 - (BOOL)openWithSource:(id<CogSource>)source;
 - (BOOL)openWithDecoder:(id<CogDecoder>) d;
 
-- (id<CogDecoder>)stealDecoder;
-
 - (void)process;
 - (NSDictionary *) properties;
 - (void)seek:(long)frame;
diff --git a/Audio/Chain/InputNode.m b/Audio/Chain/InputNode.m
index ae1dff443..93068052c 100644
--- a/Audio/Chain/InputNode.m
+++ b/Audio/Chain/InputNode.m
@@ -235,13 +235,4 @@
 	return decoder;
 }
 
-- (id<CogDecoder>) stealDecoder
-{
-    [self removeObservers];
-    id<CogDecoder> decoder = self->decoder;
-    self->decoder = [[NSClassFromString(@"SilenceDecoder") alloc] init];
-    [self registerObservers];
-    return decoder;
-}
-
 @end
diff --git a/Audio/CogAudio.xcodeproj/project.pbxproj b/Audio/CogAudio.xcodeproj/project.pbxproj
index 49f66ad87..bf2a25e81 100644
--- a/Audio/CogAudio.xcodeproj/project.pbxproj
+++ b/Audio/CogAudio.xcodeproj/project.pbxproj
@@ -43,6 +43,54 @@
 		17F94DD50B8D0F7000A34E87 /* PluginController.h in Headers */ = {isa = PBXBuildFile; fileRef = 17F94DD30B8D0F7000A34E87 /* PluginController.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		17F94DD60B8D0F7000A34E87 /* PluginController.m in Sources */ = {isa = PBXBuildFile; fileRef = 17F94DD40B8D0F7000A34E87 /* PluginController.m */; };
 		17F94DDD0B8D101100A34E87 /* Plugin.h in Headers */ = {isa = PBXBuildFile; fileRef = 17F94DDC0B8D101100A34E87 /* Plugin.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		832BEE90278D40F7005E1BC4 /* features_cpu.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE8F278D40F7005E1BC4 /* features_cpu.c */; };
+		832BEE92278D4109005E1BC4 /* s16_to_float.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE91278D4109005E1BC4 /* s16_to_float.c */; };
+		832BEE94278D412D005E1BC4 /* audio_resampler.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE93278D412D005E1BC4 /* audio_resampler.c */; };
+		832BEE96278D414A005E1BC4 /* sinc_resampler.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE95278D414A005E1BC4 /* sinc_resampler.c */; };
+		832BEE98278D4462005E1BC4 /* config_file_userdata.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE97278D4462005E1BC4 /* config_file_userdata.c */; };
+		832BEE9A278D4473005E1BC4 /* memalign.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE99278D4473005E1BC4 /* memalign.c */; };
+		832BEE9C278D451D005E1BC4 /* config_file.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE9B278D451D005E1BC4 /* config_file.c */; };
+		832BEE9E278D452C005E1BC4 /* string_list.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE9D278D452C005E1BC4 /* string_list.c */; };
+		832BEEA0278D460F005E1BC4 /* file_stream.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEE9F278D460F005E1BC4 /* file_stream.c */; };
+		832BEEA2278D464B005E1BC4 /* config.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEA1278D464B005E1BC4 /* config.h */; };
+		832BEEA4278D469D005E1BC4 /* file_path.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEEA3278D469D005E1BC4 /* file_path.c */; };
+		832BEEA6278D4755005E1BC4 /* vfs_implementation.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEEA5278D4755005E1BC4 /* vfs_implementation.c */; };
+		832BEEA8278D47F0005E1BC4 /* stdstring.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEEA7278D47F0005E1BC4 /* stdstring.c */; };
+		832BEEAA278D47FB005E1BC4 /* file_path_io.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEEA9278D47FB005E1BC4 /* file_path_io.c */; };
+		832BEEAC278D4848005E1BC4 /* encoding_utf.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEEAB278D4848005E1BC4 /* encoding_utf.c */; };
+		832BEEAE278D4853005E1BC4 /* rtime.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEEAD278D4853005E1BC4 /* rtime.c */; };
+		832BEEB0278D48C1005E1BC4 /* s32_to_float.c in Sources */ = {isa = PBXBuildFile; fileRef = 832BEEAF278D48C1005E1BC4 /* s32_to_float.c */; };
+		832BEEDD278D4A32005E1BC4 /* utf.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEB3278D4A32005E1BC4 /* utf.h */; };
+		832BEEDE278D4A32005E1BC4 /* memalign.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEB4278D4A32005E1BC4 /* memalign.h */; };
+		832BEEDF278D4A32005E1BC4 /* vfs.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEB6278D4A32005E1BC4 /* vfs.h */; };
+		832BEEE0278D4A32005E1BC4 /* vfs_implementation.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEB7278D4A32005E1BC4 /* vfs_implementation.h */; };
+		832BEEE1278D4A32005E1BC4 /* strl.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEB9278D4A32005E1BC4 /* strl.h */; };
+		832BEEE2278D4A32005E1BC4 /* strcasestr.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEBA278D4A32005E1BC4 /* strcasestr.h */; };
+		832BEEE3278D4A32005E1BC4 /* fopen_utf8.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEBB278D4A32005E1BC4 /* fopen_utf8.h */; };
+		832BEEE4278D4A32005E1BC4 /* posix_string.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEBC278D4A32005E1BC4 /* posix_string.h */; };
+		832BEEE5278D4A32005E1BC4 /* msvc.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEBD278D4A32005E1BC4 /* msvc.h */; };
+		832BEEE6278D4A32005E1BC4 /* retro_common_api.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEBE278D4A32005E1BC4 /* retro_common_api.h */; };
+		832BEEE7278D4A32005E1BC4 /* retro_timers.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEBF278D4A32005E1BC4 /* retro_timers.h */; };
+		832BEEE8278D4A32005E1BC4 /* string_list.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEC1278D4A32005E1BC4 /* string_list.h */; };
+		832BEEE9278D4A32005E1BC4 /* config_file.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEC3278D4A32005E1BC4 /* config_file.h */; };
+		832BEEEA278D4A32005E1BC4 /* config_file_userdata.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEC4278D4A32005E1BC4 /* config_file_userdata.h */; };
+		832BEEEB278D4A32005E1BC4 /* file_path.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEC5278D4A32005E1BC4 /* file_path.h */; };
+		832BEEEC278D4A32005E1BC4 /* retro_environment.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEC6278D4A32005E1BC4 /* retro_environment.h */; };
+		832BEEED278D4A32005E1BC4 /* rhmap.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEC8278D4A32005E1BC4 /* rhmap.h */; };
+		832BEEEE278D4A32005E1BC4 /* retro_inline.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEC9278D4A32005E1BC4 /* retro_inline.h */; };
+		832BEEEF278D4A32005E1BC4 /* retro_math.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEECA278D4A32005E1BC4 /* retro_math.h */; };
+		832BEEF0278D4A32005E1BC4 /* file_stream.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEECC278D4A32005E1BC4 /* file_stream.h */; };
+		832BEEF1278D4A32005E1BC4 /* features_cpu.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEECE278D4A32005E1BC4 /* features_cpu.h */; };
+		832BEEF2278D4A32005E1BC4 /* retro_miscellaneous.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEECF278D4A32005E1BC4 /* retro_miscellaneous.h */; };
+		832BEEF3278D4A32005E1BC4 /* rtime.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEED1278D4A32005E1BC4 /* rtime.h */; };
+		832BEEF4278D4A32005E1BC4 /* boolean.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEED2278D4A32005E1BC4 /* boolean.h */; };
+		832BEEF5278D4A32005E1BC4 /* audio_resampler.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEED4278D4A32005E1BC4 /* audio_resampler.h */; };
+		832BEEF6278D4A32005E1BC4 /* s16_to_float.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEED6278D4A32005E1BC4 /* s16_to_float.h */; };
+		832BEEF7278D4A32005E1BC4 /* s32_to_float.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEED7278D4A32005E1BC4 /* s32_to_float.h */; };
+		832BEEF8278D4A32005E1BC4 /* libretro.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEED8278D4A32005E1BC4 /* libretro.h */; };
+		832BEEF9278D4A32005E1BC4 /* retro_assert.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEED9278D4A32005E1BC4 /* retro_assert.h */; };
+		832BEEFA278D4A32005E1BC4 /* stdstring.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEDB278D4A32005E1BC4 /* stdstring.h */; };
+		832BEEFB278D4A32005E1BC4 /* filters.h in Headers */ = {isa = PBXBuildFile; fileRef = 832BEEDC278D4A32005E1BC4 /* filters.h */; };
 		8384912718080FF100E7332D /* Logging.h in Headers */ = {isa = PBXBuildFile; fileRef = 8384912618080FF100E7332D /* Logging.h */; };
 		839366671815923C006DD712 /* CogPluginMulti.h in Headers */ = {isa = PBXBuildFile; fileRef = 839366651815923C006DD712 /* CogPluginMulti.h */; };
 		839366681815923C006DD712 /* CogPluginMulti.m in Sources */ = {isa = PBXBuildFile; fileRef = 839366661815923C006DD712 /* CogPluginMulti.m */; };
@@ -108,6 +156,54 @@
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+		832BEE8F278D40F7005E1BC4 /* features_cpu.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = features_cpu.c; path = "../ThirdParty/RetroArch/libretro-common/features/features_cpu.c"; sourceTree = "<group>"; };
+		832BEE91278D4109005E1BC4 /* s16_to_float.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = s16_to_float.c; path = "../ThirdParty/RetroArch/libretro-common/audio/conversion/s16_to_float.c"; sourceTree = "<group>"; };
+		832BEE93278D412D005E1BC4 /* audio_resampler.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = audio_resampler.c; path = "../ThirdParty/RetroArch/libretro-common/audio/resampler/audio_resampler.c"; sourceTree = "<group>"; };
+		832BEE95278D414A005E1BC4 /* sinc_resampler.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = sinc_resampler.c; path = "../ThirdParty/RetroArch/libretro-common/audio/resampler/drivers/sinc_resampler.c"; sourceTree = "<group>"; };
+		832BEE97278D4462005E1BC4 /* config_file_userdata.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = config_file_userdata.c; path = "../ThirdParty/RetroArch/libretro-common/file/config_file_userdata.c"; sourceTree = "<group>"; };
+		832BEE99278D4473005E1BC4 /* memalign.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = memalign.c; path = "../ThirdParty/RetroArch/libretro-common/memmap/memalign.c"; sourceTree = "<group>"; };
+		832BEE9B278D451D005E1BC4 /* config_file.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = config_file.c; path = "../ThirdParty/RetroArch/libretro-common/file/config_file.c"; sourceTree = "<group>"; };
+		832BEE9D278D452C005E1BC4 /* string_list.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = string_list.c; path = "../ThirdParty/RetroArch/libretro-common/lists/string_list.c"; sourceTree = "<group>"; };
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+		832BEEB9278D4A32005E1BC4 /* strl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = strl.h; sourceTree = "<group>"; };
+		832BEEBA278D4A32005E1BC4 /* strcasestr.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = strcasestr.h; sourceTree = "<group>"; };
+		832BEEBB278D4A32005E1BC4 /* fopen_utf8.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = fopen_utf8.h; sourceTree = "<group>"; };
+		832BEEBC278D4A32005E1BC4 /* posix_string.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = posix_string.h; sourceTree = "<group>"; };
+		832BEEBD278D4A32005E1BC4 /* msvc.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = msvc.h; sourceTree = "<group>"; };
+		832BEEBE278D4A32005E1BC4 /* retro_common_api.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = retro_common_api.h; sourceTree = "<group>"; };
+		832BEEBF278D4A32005E1BC4 /* retro_timers.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = retro_timers.h; sourceTree = "<group>"; };
+		832BEEC1278D4A32005E1BC4 /* string_list.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = string_list.h; sourceTree = "<group>"; };
+		832BEEC3278D4A32005E1BC4 /* config_file.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = config_file.h; sourceTree = "<group>"; };
+		832BEEC4278D4A32005E1BC4 /* config_file_userdata.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = config_file_userdata.h; sourceTree = "<group>"; };
+		832BEEC5278D4A32005E1BC4 /* file_path.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = file_path.h; sourceTree = "<group>"; };
+		832BEEC6278D4A32005E1BC4 /* retro_environment.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = retro_environment.h; sourceTree = "<group>"; };
+		832BEEC8278D4A32005E1BC4 /* rhmap.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = rhmap.h; sourceTree = "<group>"; };
+		832BEEC9278D4A32005E1BC4 /* retro_inline.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = retro_inline.h; sourceTree = "<group>"; };
+		832BEECA278D4A32005E1BC4 /* retro_math.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = retro_math.h; sourceTree = "<group>"; };
+		832BEECC278D4A32005E1BC4 /* file_stream.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = file_stream.h; sourceTree = "<group>"; };
+		832BEECE278D4A32005E1BC4 /* features_cpu.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = features_cpu.h; sourceTree = "<group>"; };
+		832BEECF278D4A32005E1BC4 /* retro_miscellaneous.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = retro_miscellaneous.h; sourceTree = "<group>"; };
+		832BEED1278D4A32005E1BC4 /* rtime.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = rtime.h; sourceTree = "<group>"; };
+		832BEED2278D4A32005E1BC4 /* boolean.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = boolean.h; sourceTree = "<group>"; };
+		832BEED4278D4A32005E1BC4 /* audio_resampler.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = audio_resampler.h; sourceTree = "<group>"; };
+		832BEED6278D4A32005E1BC4 /* s16_to_float.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = s16_to_float.h; sourceTree = "<group>"; };
+		832BEED7278D4A32005E1BC4 /* s32_to_float.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = s32_to_float.h; sourceTree = "<group>"; };
+		832BEED8278D4A32005E1BC4 /* libretro.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = libretro.h; sourceTree = "<group>"; };
+		832BEED9278D4A32005E1BC4 /* retro_assert.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = retro_assert.h; sourceTree = "<group>"; };
+		832BEEDB278D4A32005E1BC4 /* stdstring.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = stdstring.h; sourceTree = "<group>"; };
+		832BEEDC278D4A32005E1BC4 /* filters.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = filters.h; sourceTree = "<group>"; };
 		8384912618080FF100E7332D /* Logging.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = Logging.h; path = ../../Utils/Logging.h; sourceTree = "<group>"; };
 		839366651815923C006DD712 /* CogPluginMulti.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CogPluginMulti.h; sourceTree = "<group>"; };
 		839366661815923C006DD712 /* CogPluginMulti.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CogPluginMulti.m; sourceTree = "<group>"; };
@@ -149,6 +245,7 @@
 		0867D691FE84028FC02AAC07 /* CogAudio */ = {
 			isa = PBXGroup;
 			children = (
+				832BEE8E278D40CD005E1BC4 /* ThirdParty */,
 				08FB77AEFE84172EC02AAC07 /* Classes */,
 				32C88DFF0371C24200C91783 /* Other Sources */,
 				089C1665FE841158C02AAC07 /* Resources */,
@@ -301,6 +398,166 @@
 			name = "Other Sources";
 			sourceTree = "<group>";
 		};
+		832BEE8E278D40CD005E1BC4 /* ThirdParty */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEB1278D4A32005E1BC4 /* include */,
+				832BEE93278D412D005E1BC4 /* audio_resampler.c */,
+				832BEE97278D4462005E1BC4 /* config_file_userdata.c */,
+				832BEE9B278D451D005E1BC4 /* config_file.c */,
+				832BEEAB278D4848005E1BC4 /* encoding_utf.c */,
+				832BEE8F278D40F7005E1BC4 /* features_cpu.c */,
+				832BEEA9278D47FB005E1BC4 /* file_path_io.c */,
+				832BEEA3278D469D005E1BC4 /* file_path.c */,
+				832BEE9F278D460F005E1BC4 /* file_stream.c */,
+				832BEE99278D4473005E1BC4 /* memalign.c */,
+				832BEEAD278D4853005E1BC4 /* rtime.c */,
+				832BEE91278D4109005E1BC4 /* s16_to_float.c */,
+				832BEEAF278D48C1005E1BC4 /* s32_to_float.c */,
+				832BEE95278D414A005E1BC4 /* sinc_resampler.c */,
+				832BEEA7278D47F0005E1BC4 /* stdstring.c */,
+				832BEE9D278D452C005E1BC4 /* string_list.c */,
+				832BEEA5278D4755005E1BC4 /* vfs_implementation.c */,
+				832BEEA1278D464B005E1BC4 /* config.h */,
+			);
+			name = ThirdParty;
+			sourceTree = "<group>";
+		};
+		832BEEB1278D4A32005E1BC4 /* include */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEC7278D4A32005E1BC4 /* array */,
+				832BEED3278D4A32005E1BC4 /* audio */,
+				832BEED2278D4A32005E1BC4 /* boolean.h */,
+				832BEEB8278D4A32005E1BC4 /* compat */,
+				832BEEB2278D4A32005E1BC4 /* encodings */,
+				832BEECD278D4A32005E1BC4 /* features */,
+				832BEEC2278D4A32005E1BC4 /* file */,
+				832BEEDC278D4A32005E1BC4 /* filters.h */,
+				832BEED8278D4A32005E1BC4 /* libretro.h */,
+				832BEEC0278D4A32005E1BC4 /* lists */,
+				832BEEB4278D4A32005E1BC4 /* memalign.h */,
+				832BEED9278D4A32005E1BC4 /* retro_assert.h */,
+				832BEEBE278D4A32005E1BC4 /* retro_common_api.h */,
+				832BEEC6278D4A32005E1BC4 /* retro_environment.h */,
+				832BEEC9278D4A32005E1BC4 /* retro_inline.h */,
+				832BEECA278D4A32005E1BC4 /* retro_math.h */,
+				832BEECF278D4A32005E1BC4 /* retro_miscellaneous.h */,
+				832BEEBF278D4A32005E1BC4 /* retro_timers.h */,
+				832BEECB278D4A32005E1BC4 /* streams */,
+				832BEEDA278D4A32005E1BC4 /* string */,
+				832BEED0278D4A32005E1BC4 /* time */,
+				832BEEB5278D4A32005E1BC4 /* vfs */,
+			);
+			name = include;
+			path = "../ThirdParty/RetroArch/libretro-common/include";
+			sourceTree = "<group>";
+		};
+		832BEEB2278D4A32005E1BC4 /* encodings */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEB3278D4A32005E1BC4 /* utf.h */,
+			);
+			path = encodings;
+			sourceTree = "<group>";
+		};
+		832BEEB5278D4A32005E1BC4 /* vfs */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEB6278D4A32005E1BC4 /* vfs.h */,
+				832BEEB7278D4A32005E1BC4 /* vfs_implementation.h */,
+			);
+			path = vfs;
+			sourceTree = "<group>";
+		};
+		832BEEB8278D4A32005E1BC4 /* compat */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEB9278D4A32005E1BC4 /* strl.h */,
+				832BEEBA278D4A32005E1BC4 /* strcasestr.h */,
+				832BEEBB278D4A32005E1BC4 /* fopen_utf8.h */,
+				832BEEBC278D4A32005E1BC4 /* posix_string.h */,
+				832BEEBD278D4A32005E1BC4 /* msvc.h */,
+			);
+			path = compat;
+			sourceTree = "<group>";
+		};
+		832BEEC0278D4A32005E1BC4 /* lists */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEC1278D4A32005E1BC4 /* string_list.h */,
+			);
+			path = lists;
+			sourceTree = "<group>";
+		};
+		832BEEC2278D4A32005E1BC4 /* file */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEC3278D4A32005E1BC4 /* config_file.h */,
+				832BEEC4278D4A32005E1BC4 /* config_file_userdata.h */,
+				832BEEC5278D4A32005E1BC4 /* file_path.h */,
+			);
+			path = file;
+			sourceTree = "<group>";
+		};
+		832BEEC7278D4A32005E1BC4 /* array */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEC8278D4A32005E1BC4 /* rhmap.h */,
+			);
+			path = array;
+			sourceTree = "<group>";
+		};
+		832BEECB278D4A32005E1BC4 /* streams */ = {
+			isa = PBXGroup;
+			children = (
+				832BEECC278D4A32005E1BC4 /* file_stream.h */,
+			);
+			path = streams;
+			sourceTree = "<group>";
+		};
+		832BEECD278D4A32005E1BC4 /* features */ = {
+			isa = PBXGroup;
+			children = (
+				832BEECE278D4A32005E1BC4 /* features_cpu.h */,
+			);
+			path = features;
+			sourceTree = "<group>";
+		};
+		832BEED0278D4A32005E1BC4 /* time */ = {
+			isa = PBXGroup;
+			children = (
+				832BEED1278D4A32005E1BC4 /* rtime.h */,
+			);
+			path = time;
+			sourceTree = "<group>";
+		};
+		832BEED3278D4A32005E1BC4 /* audio */ = {
+			isa = PBXGroup;
+			children = (
+				832BEED4278D4A32005E1BC4 /* audio_resampler.h */,
+				832BEED5278D4A32005E1BC4 /* conversion */,
+			);
+			path = audio;
+			sourceTree = "<group>";
+		};
+		832BEED5278D4A32005E1BC4 /* conversion */ = {
+			isa = PBXGroup;
+			children = (
+				832BEED6278D4A32005E1BC4 /* s16_to_float.h */,
+				832BEED7278D4A32005E1BC4 /* s32_to_float.h */,
+			);
+			path = conversion;
+			sourceTree = "<group>";
+		};
+		832BEEDA278D4A32005E1BC4 /* string */ = {
+			isa = PBXGroup;
+			children = (
+				832BEEDB278D4A32005E1BC4 /* stdstring.h */,
+			);
+			path = string;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */
@@ -309,25 +566,57 @@
 			buildActionMask = 2147483647;
 			files = (
 				17D21CA10B8BE4BA00D1EBDE /* BufferChain.h in Headers */,
+				832BEEE0278D4A32005E1BC4 /* vfs_implementation.h in Headers */,
 				17D21CA50B8BE4BA00D1EBDE /* InputNode.h in Headers */,
+				832BEEF5278D4A32005E1BC4 /* audio_resampler.h in Headers */,
+				832BEEDF278D4A32005E1BC4 /* vfs.h in Headers */,
+				832BEEF7278D4A32005E1BC4 /* s32_to_float.h in Headers */,
 				17D21CA70B8BE4BA00D1EBDE /* Node.h in Headers */,
+				832BEEE7278D4A32005E1BC4 /* retro_timers.h in Headers */,
 				17D21CA90B8BE4BA00D1EBDE /* OutputNode.h in Headers */,
+				832BEEFA278D4A32005E1BC4 /* stdstring.h in Headers */,
+				832BEEE3278D4A32005E1BC4 /* fopen_utf8.h in Headers */,
+				832BEEE2278D4A32005E1BC4 /* strcasestr.h in Headers */,
+				832BEEEB278D4A32005E1BC4 /* file_path.h in Headers */,
+				832BEEA2278D464B005E1BC4 /* config.h in Headers */,
 				17D21CC50B8BE4BA00D1EBDE /* OutputCoreAudio.h in Headers */,
 				17D21CC70B8BE4BA00D1EBDE /* Status.h in Headers */,
+				832BEEF2278D4A32005E1BC4 /* retro_miscellaneous.h in Headers */,
+				832BEEE4278D4A32005E1BC4 /* posix_string.h in Headers */,
+				832BEEF1278D4A32005E1BC4 /* features_cpu.h in Headers */,
 				17D21CDF0B8BE5B400D1EBDE /* VirtualRingBuffer.h in Headers */,
+				832BEEE6278D4A32005E1BC4 /* retro_common_api.h in Headers */,
+				832BEEF3278D4A32005E1BC4 /* rtime.h in Headers */,
 				17D21CF30B8BE5EF00D1EBDE /* Semaphore.h in Headers */,
+				832BEEE9278D4A32005E1BC4 /* config_file.h in Headers */,
 				17D21DC70B8BE79700D1EBDE /* CoreAudioUtils.h in Headers */,
+				832BEEE8278D4A32005E1BC4 /* string_list.h in Headers */,
+				832BEEDE278D4A32005E1BC4 /* memalign.h in Headers */,
 				17D21EBD0B8BF44000D1EBDE /* AudioPlayer.h in Headers */,
 				17F94DD50B8D0F7000A34E87 /* PluginController.h in Headers */,
 				17F94DDD0B8D101100A34E87 /* Plugin.h in Headers */,
 				17A2D3C50B8D1D37000778C4 /* AudioDecoder.h in Headers */,
+				832BEEE1278D4A32005E1BC4 /* strl.h in Headers */,
+				832BEEE5278D4A32005E1BC4 /* msvc.h in Headers */,
+				832BEEF4278D4A32005E1BC4 /* boolean.h in Headers */,
+				832BEEF9278D4A32005E1BC4 /* retro_assert.h in Headers */,
+				832BEEEE278D4A32005E1BC4 /* retro_inline.h in Headers */,
 				17C940230B900909008627D6 /* AudioMetadataReader.h in Headers */,
+				832BEEF8278D4A32005E1BC4 /* libretro.h in Headers */,
 				17B619300B909BC300BC003F /* AudioPropertiesReader.h in Headers */,
+				832BEEEA278D4A32005E1BC4 /* config_file_userdata.h in Headers */,
 				839366671815923C006DD712 /* CogPluginMulti.h in Headers */,
 				17ADB13C0B97926D00257CA2 /* AudioSource.h in Headers */,
+				832BEEF6278D4A32005E1BC4 /* s16_to_float.h in Headers */,
+				832BEEDD278D4A32005E1BC4 /* utf.h in Headers */,
+				832BEEEC278D4A32005E1BC4 /* retro_environment.h in Headers */,
 				8EC1225F0B993BD500C5B3AD /* ConverterNode.h in Headers */,
+				832BEEF0278D4A32005E1BC4 /* file_stream.h in Headers */,
 				8384912718080FF100E7332D /* Logging.h in Headers */,
+				832BEEFB278D4A32005E1BC4 /* filters.h in Headers */,
 				8E8D3D2F0CBAEE6E00135C1B /* AudioContainer.h in Headers */,
+				832BEEED278D4A32005E1BC4 /* rhmap.h in Headers */,
+				832BEEEF278D4A32005E1BC4 /* retro_math.h in Headers */,
 				B0575F2D0D687A0800411D77 /* Helper.h in Headers */,
 				07DB5F3E0ED353A900C2E3EF /* AudioMetadataWriter.h in Headers */,
 			);
@@ -405,23 +694,39 @@
 			files = (
 				17D21CA20B8BE4BA00D1EBDE /* BufferChain.m in Sources */,
 				17D21CA60B8BE4BA00D1EBDE /* InputNode.m in Sources */,
+				832BEEAA278D47FB005E1BC4 /* file_path_io.c in Sources */,
 				17D21CA80B8BE4BA00D1EBDE /* Node.m in Sources */,
 				17D21CAA0B8BE4BA00D1EBDE /* OutputNode.m in Sources */,
+				832BEEB0278D48C1005E1BC4 /* s32_to_float.c in Sources */,
 				17D21CC60B8BE4BA00D1EBDE /* OutputCoreAudio.m in Sources */,
+				832BEEA8278D47F0005E1BC4 /* stdstring.c in Sources */,
+				832BEEA0278D460F005E1BC4 /* file_stream.c in Sources */,
 				17D21CE00B8BE5B400D1EBDE /* VirtualRingBuffer.m in Sources */,
 				17D21CF40B8BE5EF00D1EBDE /* Semaphore.m in Sources */,
+				832BEE9C278D451D005E1BC4 /* config_file.c in Sources */,
+				832BEEA6278D4755005E1BC4 /* vfs_implementation.c in Sources */,
 				17D21DC80B8BE79700D1EBDE /* CoreAudioUtils.m in Sources */,
 				839366681815923C006DD712 /* CogPluginMulti.m in Sources */,
+				832BEE90278D40F7005E1BC4 /* features_cpu.c in Sources */,
+				832BEE9E278D452C005E1BC4 /* string_list.c in Sources */,
+				832BEEAC278D4848005E1BC4 /* encoding_utf.c in Sources */,
+				832BEE9A278D4473005E1BC4 /* memalign.c in Sources */,
 				17D21EBE0B8BF44000D1EBDE /* AudioPlayer.m in Sources */,
 				17F94DD60B8D0F7000A34E87 /* PluginController.m in Sources */,
+				832BEEA4278D469D005E1BC4 /* file_path.c in Sources */,
 				17A2D3C60B8D1D37000778C4 /* AudioDecoder.m in Sources */,
 				17C940240B900909008627D6 /* AudioMetadataReader.m in Sources */,
 				17B619310B909BC300BC003F /* AudioPropertiesReader.m in Sources */,
 				17ADB13D0B97926D00257CA2 /* AudioSource.m in Sources */,
 				8EC122600B993BD500C5B3AD /* ConverterNode.m in Sources */,
 				8E8D3D300CBAEE6E00135C1B /* AudioContainer.m in Sources */,
+				832BEEAE278D4853005E1BC4 /* rtime.c in Sources */,
+				832BEE96278D414A005E1BC4 /* sinc_resampler.c in Sources */,
 				B0575F300D687A4000411D77 /* Helper.m in Sources */,
+				832BEE98278D4462005E1BC4 /* config_file_userdata.c in Sources */,
 				07DB5F3F0ED353A900C2E3EF /* AudioMetadataWriter.m in Sources */,
+				832BEE94278D412D005E1BC4 /* audio_resampler.c in Sources */,
+				832BEE92278D4109005E1BC4 /* s16_to_float.c in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -516,13 +821,21 @@
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
 				GCC_NO_COMMON_BLOCKS = YES;
-				GCC_PREPROCESSOR_DEFINITIONS = "DEBUG=1";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"RARCH_INTERNAL=1",
+					"HAVE_CONFIG_H=1",
+				);
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				HEADER_SEARCH_PATHS = (
+					"../ThirdParty/RetroArch/libretro-common/include",
+					../ThirdParty/RetroArch,
+				);
 				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
@@ -557,12 +870,20 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"RARCH_INTERNAL=1",
+					"HAVE_CONFIG_H=1",
+				);
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				HEADER_SEARCH_PATHS = (
+					"../ThirdParty/RetroArch/libretro-common/include",
+					../ThirdParty/RetroArch,
+				);
 				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				SDKROOT = macosx;
 				SYMROOT = ../build;
diff --git a/Preferences/Preferences/Base.lproj/Preferences.xib b/Preferences/Preferences/Base.lproj/Preferences.xib
index 4f42e34aa..9efbf779b 100644
--- a/Preferences/Preferences/Base.lproj/Preferences.xib
+++ b/Preferences/Preferences/Base.lproj/Preferences.xib
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="19455" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="19529" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
     <dependencies>
         <deployment identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="19455"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="19529"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
@@ -245,11 +245,11 @@
             </connections>
         </customObject>
         <customView id="58" userLabel="OutputView">
-            <rect key="frame" x="0.0" y="0.0" width="530" height="103"/>
+            <rect key="frame" x="0.0" y="0.0" width="530" height="139"/>
             <autoresizingMask key="autoresizingMask"/>
             <subviews>
                 <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" allowsCharacterPickerTouchBarItem="YES" translatesAutoresizingMaskIntoConstraints="NO" id="65">
-                    <rect key="frame" x="17" y="66" width="103" height="17"/>
+                    <rect key="frame" x="17" y="100" width="123" height="17"/>
                     <autoresizingMask key="autoresizingMask"/>
                     <textFieldCell key="cell" sendsActionOnEndEditing="YES" alignment="right" title="Output Device: " id="211">
                         <font key="font" metaFont="system"/>
@@ -257,8 +257,17 @@
                         <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
                     </textFieldCell>
                 </textField>
+                <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" allowsCharacterPickerTouchBarItem="YES" translatesAutoresizingMaskIntoConstraints="NO" id="8GG-SU-ZrX">
+                    <rect key="frame" x="5" y="26" width="135" height="17"/>
+                    <autoresizingMask key="autoresizingMask"/>
+                    <textFieldCell key="cell" sendsActionOnEndEditing="YES" alignment="right" title="Resampling Quality: " id="tgE-40-uus">
+                        <font key="font" metaFont="system"/>
+                        <color key="textColor" name="controlTextColor" catalog="System" colorSpace="catalog"/>
+                        <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
+                    </textFieldCell>
+                </textField>
                 <popUpButton verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="60">
-                    <rect key="frame" x="122" y="60" width="252" height="26"/>
+                    <rect key="frame" x="143" y="94" width="252" height="26"/>
                     <autoresizingMask key="autoresizingMask"/>
                     <popUpButtonCell key="cell" type="push" title="Item1" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" state="on" borderStyle="borderAndBezel" inset="2" arrowPosition="arrowAtCenter" preferredEdge="maxY" selectedItem="62" id="210">
                         <behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
@@ -279,7 +288,7 @@
                     </connections>
                 </popUpButton>
                 <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" allowsCharacterPickerTouchBarItem="YES" translatesAutoresizingMaskIntoConstraints="NO" id="zkP-2E-1Kc">
-                    <rect key="frame" x="17" y="29" width="103" height="17"/>
+                    <rect key="frame" x="17" y="63" width="123" height="17"/>
                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                     <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Volume Level:" id="wK4-EF-8Wa">
                         <font key="font" metaFont="system"/>
@@ -288,7 +297,7 @@
                     </textFieldCell>
                 </textField>
                 <popUpButton verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="2v7-Ef-ekr">
-                    <rect key="frame" x="123" y="24" width="251" height="26"/>
+                    <rect key="frame" x="144" y="58" width="251" height="26"/>
                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                     <popUpButtonCell key="cell" type="push" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" id="vmS-eb-zen">
                         <behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
@@ -308,8 +317,29 @@
                         <binding destination="52" name="selectedObject" keyPath="values.volumeScaling" previousBinding="6uG-yb-1C2" id="mQV-hu-vZC"/>
                     </connections>
                 </popUpButton>
+                <popUpButton verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="tW9-9e-FZx">
+                    <rect key="frame" x="144" y="20" width="251" height="26"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
+                    <popUpButtonCell key="cell" type="push" title="Item 1" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" state="on" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" selectedItem="Ara-An-Gkf" id="zFu-hG-VFE">
+                        <behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
+                        <font key="font" metaFont="menu"/>
+                        <menu key="menu" title="OtherViews" id="Fqi-au-3Rx">
+                            <items>
+                                <menuItem title="Item 1" state="on" id="Ara-An-Gkf"/>
+                                <menuItem title="Item 2" id="Yet-s2-7o3"/>
+                                <menuItem title="Item 3" id="MOu-Oy-HWV"/>
+                            </items>
+                        </menu>
+                    </popUpButtonCell>
+                    <connections>
+                        <binding destination="Yrc-8b-9dF" name="content" keyPath="arrangedObjects" id="AUP-bM-LUj"/>
+                        <binding destination="Yrc-8b-9dF" name="contentObjects" keyPath="arrangedObjects.preference" previousBinding="AUP-bM-LUj" id="JGE-12-MXt"/>
+                        <binding destination="Yrc-8b-9dF" name="contentValues" keyPath="arrangedObjects.name" previousBinding="JGE-12-MXt" id="lIz-gH-9kJ"/>
+                        <binding destination="52" name="selectedObject" keyPath="values.outputResampling" previousBinding="lIz-gH-9kJ" id="wcT-TT-yKh"/>
+                    </connections>
+                </popUpButton>
             </subviews>
-            <point key="canvasLocation" x="-151" y="322"/>
+            <point key="canvasLocation" x="-151" y="337.5"/>
         </customView>
         <customObject id="i5B-ga-Atm" userLabel="MIDIPane" customClass="MIDIPane">
             <connections>
@@ -601,5 +631,13 @@
             </declaredKeys>
             <classReference key="objectClass" className="NSDictionary"/>
         </arrayController>
+        <arrayController objectClassName="NSDictionary" editable="NO" id="Yrc-8b-9dF" customClass="OutputResamplerBehaviorArrayController">
+            <declaredKeys>
+                <string>name</string>
+                <string>slug</string>
+                <string>preference</string>
+            </declaredKeys>
+            <classReference key="objectClass" className="NSDictionary"/>
+        </arrayController>
     </objects>
 </document>
diff --git a/Preferences/Preferences/OutputResamplerBehaviorArrayController.h b/Preferences/Preferences/OutputResamplerBehaviorArrayController.h
new file mode 100644
index 000000000..ec020696f
--- /dev/null
+++ b/Preferences/Preferences/OutputResamplerBehaviorArrayController.h
@@ -0,0 +1,13 @@
+//
+//  OutputResamplerBehaviorArrayController.h
+//  General
+//
+//  Created by Christopher Snowhill on 01/11/22.
+//
+//
+
+#import <Cocoa/Cocoa.h>
+
+@interface OutputResamplerBehaviorArrayController : NSArrayController
+
+@end
diff --git a/Preferences/Preferences/OutputResamplerBehaviorArrayController.m b/Preferences/Preferences/OutputResamplerBehaviorArrayController.m
new file mode 100644
index 000000000..933dbc64e
--- /dev/null
+++ b/Preferences/Preferences/OutputResamplerBehaviorArrayController.m
@@ -0,0 +1,42 @@
+//
+//  OutputResamplerBehaviorArrayController.m
+//  General
+//
+//  Created by Christopher Snowhill on 01/11/22.
+//
+//
+
+#import "OutputResamplerBehaviorArrayController.h"
+
+@implementation OutputResamplerBehaviorArrayController
+- (void)awakeFromNib
+{
+	[self removeObjects:[self arrangedObjects]];
+    
+	[self addObject:
+     [NSDictionary dictionaryWithObjectsAndKeys:
+      NSLocalizedStringFromTableInBundle(@"Lowest", nil, [NSBundle bundleForClass:[self class]], @"") , @"name",
+      @"lowest", @"preference",nil]];
+    
+	[self addObject:
+     [NSDictionary dictionaryWithObjectsAndKeys:
+      NSLocalizedStringFromTableInBundle(@"Lower", nil, [NSBundle bundleForClass:[self class]], @"") , @"name",
+      @"lower", @"preference",nil]];
+    
+	[self addObject:
+     [NSDictionary dictionaryWithObjectsAndKeys:
+      NSLocalizedStringFromTableInBundle(@"Normal", nil, [NSBundle bundleForClass:[self class]], @"") , @"name",
+      @"normal", @"preference",nil]];
+    
+    [self addObject:
+     [NSDictionary dictionaryWithObjectsAndKeys:
+      NSLocalizedStringFromTableInBundle(@"Higher", nil, [NSBundle bundleForClass:[self class]], @"") , @"name",
+      @"higher", @"preference",nil]];
+    
+	[self addObject:
+     [NSDictionary dictionaryWithObjectsAndKeys:
+      NSLocalizedStringFromTableInBundle(@"Highest", nil, [NSBundle bundleForClass:[self class]], @"") , @"name",
+      @"highest", @"preference",nil]];
+}
+
+@end
diff --git a/Preferences/Preferences/Preferences.xcodeproj/project.pbxproj b/Preferences/Preferences/Preferences.xcodeproj/project.pbxproj
index 18bf4c55c..94126b5bf 100644
--- a/Preferences/Preferences/Preferences.xcodeproj/project.pbxproj
+++ b/Preferences/Preferences/Preferences.xcodeproj/project.pbxproj
@@ -18,6 +18,7 @@
 		17E41DB80C130AA500AC744D /* Localizable.strings in Resources */ = {isa = PBXBuildFile; fileRef = 17E41DB70C130AA500AC744D /* Localizable.strings */; };
 		17E78A7E0D68BE3C005C5A59 /* file_tree.png in Resources */ = {isa = PBXBuildFile; fileRef = 17E78A7D0D68BE3C005C5A59 /* file_tree.png */; };
 		17E78B6A0D68C1E3005C5A59 /* Preferences.xib in Resources */ = {isa = PBXBuildFile; fileRef = 17E78B680D68C1E3005C5A59 /* Preferences.xib */; };
+		832BEF00278D989E005E1BC4 /* OutputResamplerBehaviorArrayController.m in Sources */ = {isa = PBXBuildFile; fileRef = 832BEEFC278D989E005E1BC4 /* OutputResamplerBehaviorArrayController.m */; };
 		83651DA527322C8700A2C097 /* MIDIFlavorBehaviorArrayController.m in Sources */ = {isa = PBXBuildFile; fileRef = 83651DA327322C8700A2C097 /* MIDIFlavorBehaviorArrayController.m */; };
 		8372053718E3DEAF007EFAD4 /* ResamplerBehaviorArrayController.m in Sources */ = {isa = PBXBuildFile; fileRef = 8372053618E3DEAF007EFAD4 /* ResamplerBehaviorArrayController.m */; };
 		837C0D401C50954000CAE18F /* MIDIPluginBehaviorArrayController.m in Sources */ = {isa = PBXBuildFile; fileRef = 837C0D3F1C50954000CAE18F /* MIDIPluginBehaviorArrayController.m */; };
@@ -93,6 +94,8 @@
 		32DBCF630370AF2F00C91783 /* Preferences_Prefix.pch */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Preferences_Prefix.pch; sourceTree = "<group>"; };
 		3DFAC48E235B6B8100A29416 /* DEVELOPMENT_TEAM.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = DEVELOPMENT_TEAM.xcconfig; sourceTree = "<group>"; };
 		3DFAC48F235B6B8100A29416 /* Shared.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = Shared.xcconfig; sourceTree = "<group>"; };
+		832BEEFC278D989E005E1BC4 /* OutputResamplerBehaviorArrayController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = OutputResamplerBehaviorArrayController.m; sourceTree = "<group>"; };
+		832BEEFF278D989E005E1BC4 /* OutputResamplerBehaviorArrayController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = OutputResamplerBehaviorArrayController.h; sourceTree = "<group>"; };
 		833F681B1CDBCAA700AFB9F0 /* es */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.strings; name = es; path = es.lproj/InfoPlist.strings; sourceTree = "<group>"; };
 		833F681C1CDBCAA700AFB9F0 /* es */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = es; path = es.lproj/Localizable.strings; sourceTree = "<group>"; };
 		8347435D20E6D58800063D45 /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/Preferences.strings; sourceTree = "<group>"; };
@@ -245,6 +248,8 @@
 				83651DA327322C8700A2C097 /* MIDIFlavorBehaviorArrayController.m */,
 				837C0D3E1C50954000CAE18F /* MIDIPluginBehaviorArrayController.h */,
 				837C0D3F1C50954000CAE18F /* MIDIPluginBehaviorArrayController.m */,
+				832BEEFF278D989E005E1BC4 /* OutputResamplerBehaviorArrayController.h */,
+				832BEEFC278D989E005E1BC4 /* OutputResamplerBehaviorArrayController.m */,
 				17C643370B8A77CC00C53518 /* OutputsArrayController.h */,
 				17C643360B8A77CC00C53518 /* OutputsArrayController.m */,
 				99F1813D0DE01D7A00FD5FFB /* PlaylistBehaviorArrayController.h */,
@@ -457,6 +462,7 @@
 				8E07AA8A0AAC8EA200A4B32F /* GeneralPreferencesPlugin.m in Sources */,
 				83EF495F17FBC96A00642E3C /* VolumeBehaviorArrayController.m in Sources */,
 				17C643380B8A77CC00C53518 /* OutputsArrayController.m in Sources */,
+				832BEF00278D989E005E1BC4 /* OutputResamplerBehaviorArrayController.m in Sources */,
 				837C0D401C50954000CAE18F /* MIDIPluginBehaviorArrayController.m in Sources */,
 				17C6433F0B8A783F00C53518 /* OutputPane.m in Sources */,
 				170744AD0BFF3938002475C9 /* AppcastArrayController.m in Sources */,
diff --git a/ThirdParty/RetroArch/config.h b/ThirdParty/RetroArch/config.h
new file mode 100644
index 000000000..de12266c4
--- /dev/null
+++ b/ThirdParty/RetroArch/config.h
@@ -0,0 +1,22 @@
+#ifndef _RARCH_CONFIG_H
+#define _RARCH_CONFIG_H
+
+#include <TargetConditionals.h>
+
+#define HAVE_SSIZE_T 1
+#define HAVE_STRL 1
+
+#if TARGET_CPU_X86 || TARGET_CPU_X86_64
+#define HAVE_SSE 1
+#define __SSE__ 1
+#define __SSE2__ 1
+#define __AVX__ 1
+#endif
+
+#if TARGET_CPU_ARM || TARGET_CPU_ARM64
+#define HAVE_NEON 1
+#define __ARM_NEON__ 1
+#endif
+
+#endif
+
diff --git a/ThirdParty/RetroArch/libretro-common/audio/conversion/s16_to_float.c b/ThirdParty/RetroArch/libretro-common/audio/conversion/s16_to_float.c
new file mode 100644
index 000000000..0ee858b0f
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/audio/conversion/s16_to_float.c
@@ -0,0 +1,110 @@
+/* Copyright  (C) 2010-2021 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (s16_to_float.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if defined(__SSE2__)
+#include <emmintrin.h>
+#endif
+
+#include <boolean.h>
+#include <features/features_cpu.h>
+#include <audio/conversion/s16_to_float.h>
+
+#if (defined(__ARM_NEON__) || defined(HAVE_NEON))
+static bool s16_to_float_neon_enabled = false;
+
+#include <arm_neon.h>
+
+void convert_s16_to_float(float *out,
+      const int16_t *in, size_t samples, float gain)
+{
+   unsigned i      = 0;
+
+   if (s16_to_float_neon_enabled)
+   {
+      float        gf        = gain / (1 << 15);
+      float32x4_t vgf        = {gf, gf, gf, gf};
+      while (samples >= 8)
+      {
+         float32x4x2_t oreg;
+         int16x4x2_t inreg   = vld2_s16(in);
+         int32x4_t      p1   = vmovl_s16(inreg.val[0]);
+         int32x4_t      p2   = vmovl_s16(inreg.val[1]);
+         oreg.val[0]         = vmulq_f32(vcvtq_f32_s32(p1), vgf);
+         oreg.val[1]         = vmulq_f32(vcvtq_f32_s32(p2), vgf);
+         vst2q_f32(out, oreg);
+         in                 += 8;
+         out                += 8;
+         samples            -= 8;
+      }
+   }
+
+   gain /= 0x8000;
+
+   for (; i < samples; i++)
+      out[i] = (float)in[i] * gain;
+}
+
+void convert_s16_to_float_init_simd(void)
+{
+   uint64_t cpu = cpu_features_get();
+
+   if (cpu & RETRO_SIMD_NEON)
+      s16_to_float_neon_enabled = true;
+}
+#else
+void convert_s16_to_float(float *out,
+      const int16_t *in, size_t samples, float gain)
+{
+   unsigned i      = 0;
+
+#if defined(__SSE2__)
+   float fgain   = gain / UINT32_C(0x80000000);
+   __m128 factor = _mm_set1_ps(fgain);
+
+   for (i = 0; i + 8 <= samples; i += 8, in += 8, out += 8)
+   {
+      __m128i input    = _mm_loadu_si128((const __m128i *)in);
+      __m128i regs_l   = _mm_unpacklo_epi16(_mm_setzero_si128(), input);
+      __m128i regs_r   = _mm_unpackhi_epi16(_mm_setzero_si128(), input);
+      __m128 output_l  = _mm_mul_ps(_mm_cvtepi32_ps(regs_l), factor);
+      __m128 output_r  = _mm_mul_ps(_mm_cvtepi32_ps(regs_r), factor);
+
+      _mm_storeu_ps(out + 0, output_l);
+      _mm_storeu_ps(out + 4, output_r);
+   }
+
+   samples = samples - i;
+   i       = 0;
+#endif
+
+   gain   /= 0x8000;
+
+   for (; i < samples; i++)
+      out[i] = (float)in[i] * gain;
+}
+
+void convert_s16_to_float_init_simd(void) { }
+#endif
+
diff --git a/ThirdParty/RetroArch/libretro-common/audio/conversion/s32_to_float.c b/ThirdParty/RetroArch/libretro-common/audio/conversion/s32_to_float.c
new file mode 100644
index 000000000..2ad72ea82
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/audio/conversion/s32_to_float.c
@@ -0,0 +1,107 @@
+/* Copyright  (C) 2010-2021 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (s32_to_float.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if defined(__SSE2__)
+#include <emmintrin.h>
+#endif
+
+#include <boolean.h>
+#include <features/features_cpu.h>
+#include <audio/conversion/s32_to_float.h>
+
+#if (defined(__ARM_NEON__) || defined(HAVE_NEON))
+static bool s32_to_float_neon_enabled = false;
+
+#include <arm_neon.h>
+
+void convert_s32_to_float(float *out,
+      const int32_t *in, size_t samples, float gain)
+{
+   unsigned i      = 0;
+
+   if (s32_to_float_neon_enabled)
+   {
+      float        gf        = gain / (1 << 31);
+      float32x4_t vgf        = {gf, gf, gf, gf};
+      while (samples >= 8)
+      {
+         float32x4x2_t oreg;
+         int32x4x2_t inreg   = vld1q_s32_x2(in);
+         oreg.val[0]         = vmulq_f32(vcvtq_f32_s32(inreg.val[0]), vgf);
+         oreg.val[1]         = vmulq_f32(vcvtq_f32_s32(inreg.val[1]), vgf);
+         vst2q_f32(out, oreg);
+         in                 += 8;
+         out                += 8;
+         samples            -= 8;
+      }
+   }
+
+   gain /= 0x80000000L;
+
+   for (; i < samples; i++)
+      out[i] = (float)in[i] * gain;
+}
+
+void convert_s32_to_float_init_simd(void)
+{
+   uint64_t cpu = cpu_features_get();
+
+   if (cpu & RETRO_SIMD_NEON)
+      s32_to_float_neon_enabled = true;
+}
+#else
+void convert_s32_to_float(float *out,
+      const int32_t *in, size_t samples, float gain)
+{
+   unsigned i      = 0;
+
+#if defined(__SSE2__)
+   float fgain   = gain / UINT32_C(0x80000000);
+   __m128 factor = _mm_set1_ps(fgain);
+
+   for (i = 0; i + 8 <= samples; i += 8, in += 8, out += 8)
+   {
+      __m128i input    = _mm_loadu_si128((const __m128i *)in);
+      __m128i input2   = _mm_loadu_si128((const __m128i *)(in + 4));
+      __m128 output_l  = _mm_mul_ps(_mm_cvtepi32_ps(input), factor);
+      __m128 output_r  = _mm_mul_ps(_mm_cvtepi32_ps(input2), factor);
+
+      _mm_storeu_ps(out + 0, output_l);
+      _mm_storeu_ps(out + 4, output_r);
+   }
+
+   samples = samples - i;
+   i       = 0;
+#endif
+
+   gain   /= 0x80000000L;
+
+   for (; i < samples; i++)
+      out[i] = (float)in[i] * gain;
+}
+
+void convert_s32_to_float_init_simd(void) { }
+#endif
+
diff --git a/ThirdParty/RetroArch/libretro-common/audio/resampler/audio_resampler.c b/ThirdParty/RetroArch/libretro-common/audio/resampler/audio_resampler.c
new file mode 100644
index 000000000..fbb206d3c
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/audio/resampler/audio_resampler.c
@@ -0,0 +1,197 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (audio_resampler.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
+#include <string/stdstring.h>
+#include <features/features_cpu.h>
+#include <file/config_file_userdata.h>
+
+#include <audio/audio_resampler.h>
+
+static void resampler_null_process(void *a, struct resampler_data *b) { }
+static size_t resampler_null_latency(void *a) { return 0; }
+static void resampler_null_free(void *a) { }
+static void *resampler_null_init(const struct resampler_config *a, double b,
+      enum resampler_quality c, size_t d, resampler_simd_mask_t e) { return (void*)0; }
+
+retro_resampler_t null_resampler = {
+   resampler_null_init,
+   resampler_null_process,
+   resampler_null_free,
+   resampler_null_latency,
+   RESAMPLER_API_VERSION,
+   "null",
+   "null"
+};
+
+static const retro_resampler_t *resampler_drivers[] = {
+   &sinc_resampler,
+#ifdef HAVE_CC_RESAMPLER
+   &CC_resampler,
+#endif
+#ifdef HAVE_NEAREST_RESAMPLER
+   &nearest_resampler,
+#endif
+   &null_resampler,
+   NULL,
+};
+
+static const struct resampler_config resampler_config = {
+   config_userdata_get_float,
+   config_userdata_get_int,
+   config_userdata_get_float_array,
+   config_userdata_get_int_array,
+   config_userdata_get_string,
+   config_userdata_free,
+};
+
+/**
+ * find_resampler_driver_index:
+ * @ident                      : Identifier of resampler driver to find.
+ *
+ * Finds resampler driver index by @ident name.
+ *
+ * Returns: resampler driver index if resampler driver was found, otherwise
+ * -1.
+ **/
+static int find_resampler_driver_index(const char *ident)
+{
+   unsigned i;
+
+   for (i = 0; resampler_drivers[i]; i++)
+      if (string_is_equal_noncase(ident, resampler_drivers[i]->ident))
+         return i;
+   return -1;
+}
+
+/**
+ * find_resampler_driver:
+ * @ident                      : Identifier of resampler driver to find.
+ *
+ * Finds resampler by @ident name.
+ *
+ * Returns: resampler driver if resampler driver was found, otherwise
+ * NULL.
+ **/
+static const retro_resampler_t *find_resampler_driver(const char *ident)
+{
+   int i = find_resampler_driver_index(ident);
+
+   if (i >= 0)
+      return resampler_drivers[i];
+
+   return resampler_drivers[0];
+}
+
+/**
+ * resampler_append_plugs:
+ * @re                         : Resampler handle
+ * @backend                    : Resampler backend that is about to be set.
+ * @bw_ratio                   : Bandwidth ratio.
+ *
+ * Initializes resampler driver based on queried CPU features.
+ *
+ * Returns: true (1) if successfully initialized, otherwise false (0).
+ **/
+static bool resampler_append_plugs(void **re,
+      const retro_resampler_t **backend,
+      enum resampler_quality quality,
+      size_t channels,
+      double bw_ratio)
+{
+   resampler_simd_mask_t mask = (resampler_simd_mask_t)cpu_features_get();
+
+   if (*backend)
+      *re = (*backend)->init(&resampler_config, bw_ratio, quality, channels, mask);
+
+   if (!*re)
+      return false;
+   return true;
+}
+
+
+/**
+ * audio_resampler_driver_find_handle:
+ * @idx                : index of driver to get handle to.
+ *
+ * Returns: handle to audio resampler driver at index. Can be NULL
+ * if nothing found.
+ **/
+const void *audio_resampler_driver_find_handle(int idx)
+{
+   const void *drv = resampler_drivers[idx];
+   if (!drv)
+      return NULL;
+   return drv;
+}
+
+/**
+ * audio_resampler_driver_find_ident:
+ * @idx                : index of driver to get handle to.
+ *
+ * Returns: Human-readable identifier of audio resampler driver at index.
+ * Can be NULL if nothing found.
+ **/
+const char *audio_resampler_driver_find_ident(int idx)
+{
+   const retro_resampler_t *drv = resampler_drivers[idx];
+   if (!drv)
+      return NULL;
+   return drv->ident;
+}
+
+/**
+ * retro_resampler_realloc:
+ * @re                         : Resampler handle
+ * @backend                    : Resampler backend that is about to be set.
+ * @ident                      : Identifier name for resampler we want.
+ * @bw_ratio                   : Bandwidth ratio.
+ *
+ * Reallocates resampler. Will free previous handle before
+ * allocating a new one. If ident is NULL, first resampler will be used.
+ *
+ * Returns: true (1) if successful, otherwise false (0).
+ **/
+bool retro_resampler_realloc(void **re, const retro_resampler_t **backend,
+      const char *ident, enum resampler_quality quality, size_t channels,
+      double bw_ratio)
+{
+   if (*re && *backend)
+      (*backend)->free(*re);
+
+   *re      = NULL;
+   *backend = find_resampler_driver(ident);
+
+   if (!resampler_append_plugs(re, backend, quality, channels, bw_ratio))
+   {
+      if (!*re)
+         *backend = NULL;
+      return false;
+   }
+
+   return true;
+}
diff --git a/ThirdParty/RetroArch/libretro-common/audio/resampler/drivers/sinc_resampler.c b/ThirdParty/RetroArch/libretro-common/audio/resampler/drivers/sinc_resampler.c
new file mode 100644
index 000000000..32f59854e
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/audio/resampler/drivers/sinc_resampler.c
@@ -0,0 +1,1079 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (sinc_resampler.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/* Bog-standard windowed SINC implementation. */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+
+#include <retro_environment.h>
+#include <retro_inline.h>
+#include <filters.h>
+#include <memalign.h>
+
+#include <audio/audio_resampler.h>
+#include <filters.h>
+
+#ifdef __SSE__
+#include <xmmintrin.h>
+#endif
+
+#if defined(__AVX__)
+#include <immintrin.h>
+#endif
+
+/* Rough SNR values for upsampling:
+ * LOWEST: 40 dB
+ * LOWER: 55 dB
+ * NORMAL: 70 dB
+ * HIGHER: 110 dB
+ * HIGHEST: 140 dB
+ */
+
+/* TODO, make all this more configurable. */
+
+enum sinc_window
+{
+   SINC_WINDOW_NONE   = 0,
+   SINC_WINDOW_KAISER,
+   SINC_WINDOW_LANCZOS
+};
+
+/* For the little amount of taps we're using,
+ * SSE1 is faster than AVX for some reason.
+ * AVX code is kept here though as by increasing number
+ * of sinc taps, the AVX code is clearly faster than SSE1.
+ */
+
+typedef struct rarch_sinc_resampler
+{
+   /* A buffer for phase_table, buffer_l and buffer_r
+    * are created in a single calloc().
+    * Ensure that we get as good cache locality as we can hope for. */
+   float *main_buffer;
+   float *phase_table;
+   float **buffer;
+   unsigned phase_bits;
+   unsigned subphase_bits;
+   unsigned subphase_mask;
+   unsigned taps;
+   unsigned ptr;
+   size_t channels;
+   uint32_t time;
+   float subphase_mod;
+   float kaiser_beta;
+} rarch_sinc_resampler_t;
+
+#if (defined(__ARM_NEON__) || defined(HAVE_NEON))
+
+#include <arm_neon.h>
+
+/* Assumes that taps >= 8, and that taps is a multiple of 8.
+ * Not bothering to reimplement this one for the external .S
+ */
+static void resampler_sinc_process_neon_kaiser(void *re_, struct resampler_data *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)re_;
+   unsigned phases                = 1 << (resamp->phase_bits + resamp->subphase_bits);
+   uint32_t ratio                 = phases / data->ratio;
+   const float *input             = data->data_in;
+   float *output                  = data->data_out;
+   size_t frames                  = data->input_frames;
+   size_t out_frames              = 0;
+   size_t channel;
+   size_t channels                = resamp->channels;
+   while (frames)
+   {
+      while (frames && resamp->time >= phases)
+      {
+         /* Push in reverse to make filter more obvious. */
+         if (!resamp->ptr)
+            resamp->ptr = resamp->taps;
+         resamp->ptr--;
+
+         for (channel = 0; channel < channels; ++channel)
+         {
+            resamp->buffer[channel][resamp->ptr + resamp->taps] =
+               resamp->buffer[channel][resamp->ptr]             = *input++;
+         }
+
+         resamp->time                                -= phases;
+         frames--;
+      }
+
+      {
+         const float *buffer[channels];
+         
+         for (channel = 0; channel < channels; ++channel)
+         {
+            buffer[channel] = resamp->buffer[channel] + resamp->ptr;
+         }
+         unsigned taps = resamp->taps;
+         while (resamp->time < phases)
+         {
+            unsigned phase           = resamp->time >> resamp->subphase_bits;
+            const float *phase_table = resamp->phase_table + phase * taps * 2;
+            const float *delta_table = phase_table + taps;
+            float32x4_t delta        = vdupq_n_f32((resamp->time & resamp->subphase_mask) * resamp->subphase_mod);
+            unsigned i;
+            float32x4_t outp[channels];
+            for (channel = 0; channel < channels; channel++)
+            {
+               outp[channel] = vdupq_n_f32(0);
+            }
+
+            for (i = 0; i < taps; i += 8)
+            {
+               float32x4x2_t coeff8  = vld2q_f32(&phase_table[i]);
+               float32x4x2_t delta8  = vld2q_f32(&delta_table[i]);
+
+               coeff8.val[0] = vmlaq_f32(coeff8.val[0], delta8.val[0], delta);
+               coeff8.val[1] = vmlaq_f32(coeff8.val[1], delta8.val[1], delta);
+                
+               for (channel = 0; channel < channels; ++channel)
+               {
+                   float32x4x2_t samples = vld2q_f32(&buffer[channel][i]);
+                   outp[channel] = vmlaq_f32(outp[channel], samples.val[0], coeff8.val[0]);
+                   outp[channel] = vmlaq_f32(outp[channel], samples.val[1], coeff8.val[1]);
+               }
+            }
+
+            for (channel = 0; channel < channels; ++channel)
+            {
+               float32x2_t r = vadd_f32(vget_low_f32(outp[channel]), vget_high_f32(outp[channel]));
+               output[channel] = vget_lane_f32(vpadd_f32(r, r), 0);
+            }
+            output                 += channels;
+            out_frames++;
+            resamp->time           += ratio;
+         }
+      }
+   }
+
+   data->output_frames = out_frames;
+}
+
+/* Assumes that taps >= 8, and that taps is a multiple of 8. */
+static void resampler_sinc_process_neon(void *re_, struct resampler_data *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)re_;
+   unsigned phases                = 1 << (resamp->phase_bits + resamp->subphase_bits);
+   uint32_t ratio                 = phases / data->ratio;
+   const float *input             = data->data_in;
+   float *output                  = data->data_out;
+   size_t frames                  = data->input_frames;
+   size_t out_frames              = 0;
+   size_t channel;
+   size_t channels                = resamp->channels;
+   while (frames)
+   {
+      while (frames && resamp->time >= phases)
+      {
+         /* Push in reverse to make filter more obvious. */
+         if (!resamp->ptr)
+            resamp->ptr = resamp->taps;
+         resamp->ptr--;
+
+         for (channel = 0; channel < channels; ++channel)
+         {
+            resamp->buffer[channel][resamp->ptr + resamp->taps] =
+               resamp->buffer[channel][resamp->ptr]                = *input++;
+         }
+
+         resamp->time                                -= phases;
+         frames--;
+      }
+
+      {
+         const float *buffer[channels];
+         for (channel = 0; channel < channels; ++channel)
+         {
+            buffer[channel] = resamp->buffer[channel] + resamp->ptr;
+         }
+         unsigned taps            = resamp->taps;
+         while (resamp->time < phases)
+         {
+            unsigned phase           = resamp->time >> resamp->subphase_bits;
+            const float *phase_table = resamp->phase_table + phase * taps;
+            unsigned i;
+            float32x4_t outp[channels];
+            for (channel = 0; channel < channels; channel++)
+            {
+               outp[channel] = vdupq_n_f32(0);
+            }
+
+            for (i = 0; i < taps; i += 8)
+            {
+               float32x4x2_t coeff8  = vld2q_f32(&phase_table[i]);
+                
+               for (channel = 0; channel < channels; ++channel)
+               {
+                  float32x4x2_t sample  = vld2q_f32(&buffer[channel][i]);
+                   
+                  outp[channel] = vmlaq_f32(outp[channel], sample.val[0], coeff8.val[0]);
+                  outp[channel] = vmlaq_f32(outp[channel], sample.val[1], coeff8.val[1]);
+               }
+            }
+
+            for (channel = 0; channel < channels; ++channel)
+            {
+               float32x2_t sample = vadd_f32(vget_low_f32(outp[channel]), vget_high_f32(outp[channel]));
+               output[channel] = vget_lane_f32(vpadd_f32(sample, sample), 0);
+            }
+            output                 += channels;
+            out_frames++;
+            resamp->time           += ratio;
+         }
+      }
+   }
+
+   data->output_frames = out_frames;
+}
+#endif
+
+#if defined(__AVX__)
+#pragma clang attribute push (__attribute__((target("avx"))), apply_to=function)
+static void resampler_sinc_process_avx_kaiser(void *re_, struct resampler_data *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)re_;
+   unsigned phases                = 1 << (resamp->phase_bits + resamp->subphase_bits);
+
+   uint32_t ratio                 = phases / data->ratio;
+   const float *input             = data->data_in;
+   float *output                  = data->data_out;
+   size_t frames                  = data->input_frames;
+   size_t out_frames              = 0;
+   size_t channel;
+   size_t channels                = resamp->channels;
+
+   {
+      while (frames)
+      {
+         while (frames && resamp->time >= phases)
+         {
+            /* Push in reverse to make filter more obvious. */
+            if (!resamp->ptr)
+               resamp->ptr = resamp->taps;
+            resamp->ptr--;
+
+            for (channel = 0; channel < channels; ++channel)
+            {
+               resamp->buffer[channel][resamp->ptr + resamp->taps] =
+                  resamp->buffer[channel][resamp->ptr]             = *input++;
+            }
+
+            resamp->time                                -= phases;
+            frames--;
+         }
+
+         {
+            const float *buffer[channels];
+            for (channel = 0; channel < channels; ++channel)
+            {
+               buffer[channel] = resamp->buffer[channel] + resamp->ptr;
+            }
+            unsigned taps            = resamp->taps;
+            while (resamp->time < phases)
+            {
+               unsigned i;
+               unsigned phase           = resamp->time >> resamp->subphase_bits;
+
+               float *phase_table       = resamp->phase_table + phase * taps * 2;
+               float *delta_table       = phase_table + taps;
+               __m256 delta             = _mm256_set1_ps((float)
+                     (resamp->time & resamp->subphase_mask) * resamp->subphase_mod);
+
+               __m256 sums[channels];
+               for (channel = 0; channel < channels; channel++)
+               {
+                  sums[channel] = _mm256_setzero_ps();
+               }
+
+               for (i = 0; i < taps; i += 8)
+               {
+                  __m256 deltas = _mm256_load_ps(delta_table + i);
+                  __m256 sinc   = _mm256_add_ps(_mm256_load_ps((const float*)phase_table + i),
+                        _mm256_mul_ps(deltas, delta));
+
+                  for (channel = 0; channel < channels; ++channel)
+                  {
+                     __m256 buf = _mm256_loadu_ps(buffer[channel] + i);
+                     sums[channel] = _mm256_add_ps(sums[channel], _mm256_mul_ps(buf, sinc));
+                  }
+               }
+
+               /* hadd on AVX is weird, and acts on low-lanes
+                * and high-lanes separately. */
+               for (channel = 0; channel < channels; ++channel)
+               {
+                  __m256 res = _mm256_hadd_ps(sums[channel], sums[channel]);
+                  res        = _mm256_hadd_ps(res, res);
+                  res        = _mm256_add_ps(_mm256_permute2f128_ps(res, res, 1), res);
+
+                  /* This is optimized to mov %xmmN, [mem].
+                   * There doesn't seem to be any _mm256_store_ss intrinsic. */
+                  _mm_store_ss(output + channel, _mm256_extractf128_ps(res, 0));
+               }
+
+               output += channels;
+               out_frames++;
+               resamp->time += ratio;
+            }
+         }
+      }
+   }
+
+   data->output_frames = out_frames;
+}
+
+static void resampler_sinc_process_avx(void *re_, struct resampler_data *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)re_;
+   unsigned phases                = 1 << (resamp->phase_bits + resamp->subphase_bits);
+
+   uint32_t ratio                 = phases / data->ratio;
+   const float *input             = data->data_in;
+   float *output                  = data->data_out;
+   size_t frames                  = data->input_frames;
+   size_t out_frames              = 0;
+   size_t channel;
+   size_t channels                = resamp->channels;
+
+   {
+      while (frames)
+      {
+         while (frames && resamp->time >= phases)
+         {
+            /* Push in reverse to make filter more obvious. */
+            if (!resamp->ptr)
+               resamp->ptr = resamp->taps;
+            resamp->ptr--;
+
+            for (channel = 0; channel < channels; ++channel)
+            {
+               resamp->buffer[channel][resamp->ptr + resamp->taps] =
+                  resamp->buffer[channel][resamp->ptr]             = *input++;
+            }
+
+            resamp->time                                -= phases;
+            frames--;
+         }
+
+         {
+            const float *buffer[channels];
+            for (channel = 0; channel < channels; ++channel)
+            {
+               buffer[channel] = resamp->buffer[channel] + resamp->ptr;
+            }
+            unsigned taps            = resamp->taps;
+            while (resamp->time < phases)
+            {
+               unsigned i;
+               __m256 delta;
+               unsigned phase           = resamp->time >> resamp->subphase_bits;
+               float *phase_table       = resamp->phase_table + phase * taps;
+
+               __m256 sums[channels];
+               for (channel = 0; channel < channels; channel++)
+               {
+                  sums[channel] = _mm256_setzero_ps();
+               }
+
+               for (i = 0; i < taps; i += 8)
+               {
+                  __m256 sinc   = _mm256_load_ps((const float*)phase_table + i);
+
+                  for (channel = 0; channel < channels; ++channel)
+                  {
+                     __m256 buf = _mm256_loadu_ps(buffer[channel] + i);
+                     sums[channel] = _mm256_add_ps(sums[channel], _mm256_mul_ps(buf, sinc));
+                  }
+               }
+
+               /* hadd on AVX is weird, and acts on low-lanes
+                * and high-lanes separately. */
+               for (channel = 0; channel < channels; ++channel)
+               {
+                  __m256 res = _mm256_hadd_ps(sums[channel], sums[channel]);
+                  res        = _mm256_hadd_ps(res, res);
+                  res        = _mm256_add_ps(_mm256_permute2f128_ps(res, res, 1), res);
+
+                  /* This is optimized to mov %xmmN, [mem].
+                   * There doesn't seem to be any _mm256_store_ss intrinsic. */
+                  _mm_store_ss(output + channel, _mm256_extractf128_ps(res, 0));
+               }
+
+               output += channels;
+               out_frames++;
+               resamp->time += ratio;
+            }
+         }
+      }
+   }
+
+   data->output_frames = out_frames;
+}
+#pragma clang attribute pop
+#endif
+
+#if defined(__SSE__)
+static void resampler_sinc_process_sse_kaiser(void *re_, struct resampler_data *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)re_;
+   unsigned phases                = 1 << (resamp->phase_bits + resamp->subphase_bits);
+
+   uint32_t ratio                 = phases / data->ratio;
+   const float *input             = data->data_in;
+   float *output                  = data->data_out;
+   size_t frames                  = data->input_frames;
+   size_t out_frames              = 0;
+   size_t channel;
+   size_t channels                = resamp->channels;
+
+   {
+      while (frames)
+      {
+         while (frames && resamp->time >= phases)
+         {
+            /* Push in reverse to make filter more obvious. */
+            if (!resamp->ptr)
+               resamp->ptr = resamp->taps;
+            resamp->ptr--;
+
+            for (channel = 0; channel < channels; ++channel)
+            {
+               resamp->buffer[channel][resamp->ptr + resamp->taps] =
+                  resamp->buffer[channel][resamp->ptr]             = *input++;
+            }
+
+            resamp->time                                -= phases;
+            frames--;
+         }
+
+         {
+            const float *buffer[channels];
+            for (channel = 0; channel < channels; ++channel)
+            {
+               buffer[channel] = resamp->buffer[channel] + resamp->ptr;
+            }
+            unsigned taps            = resamp->taps;
+            while (resamp->time < phases)
+            {
+               unsigned i;
+               unsigned phase           = resamp->time >> resamp->subphase_bits;
+               float *phase_table       = resamp->phase_table + phase * taps * 2;
+               float *delta_table       = phase_table + taps;
+               __m128 delta             = _mm_set1_ps((float)
+                     (resamp->time & resamp->subphase_mask) * resamp->subphase_mod);
+
+               __m128 sums[channels];
+               for (channel = 0; channel < channels; channel++)
+               {
+                  sums[channel] = _mm_setzero_ps();
+               }
+
+               for (i = 0; i < taps; i += 4)
+               {
+                  __m128 deltas = _mm_load_ps(delta_table + i);
+                  __m128 _sinc  = _mm_add_ps(_mm_load_ps((const float*)phase_table + i),
+                        _mm_mul_ps(deltas, delta));
+                  for (channel = 0; channel < channels; ++channel)
+                  {
+                     __m128 buf = _mm_loadu_ps(buffer[channel] + i);
+                     sums[channel] = _mm_add_ps(sums[channel], _mm_mul_ps(buf, _sinc));
+                  }
+               }
+                
+               for (channel = 0; channel < channels; ++channel)
+               {
+                  __m128 v = sums[channel];
+                  __m128 shuf = _mm_shuffle_ps(v, v, _MM_SHUFFLE(2, 3, 0, 1));
+                  __m128 sums = _mm_add_ps(v, shuf);
+                  shuf = _mm_movehl_ps(shuf, sums);
+                  sums = _mm_add_ps(sums, shuf);
+                  output[channel] = _mm_cvtss_f32(sums);
+               }
+
+               output += channels;
+               out_frames++;
+               resamp->time += ratio;
+            }
+         }
+      }
+   }
+
+   data->output_frames = out_frames;
+}
+
+static void resampler_sinc_process_sse(void *re_, struct resampler_data *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)re_;
+   unsigned phases                = 1 << (resamp->phase_bits + resamp->subphase_bits);
+
+   uint32_t ratio                 = phases / data->ratio;
+   const float *input             = data->data_in;
+   float *output                  = data->data_out;
+   size_t frames                  = data->input_frames;
+   size_t out_frames              = 0;
+   size_t channel;
+   size_t channels                = resamp->channels;
+
+   {
+      while (frames)
+      {
+         while (frames && resamp->time >= phases)
+         {
+            /* Push in reverse to make filter more obvious. */
+            if (!resamp->ptr)
+               resamp->ptr = resamp->taps;
+            resamp->ptr--;
+
+            for (channel = 0; channel < channels; ++channel)
+            {
+               resamp->buffer[channel][resamp->ptr + resamp->taps] =
+                  resamp->buffer[channel][resamp->ptr]             = *input++;
+            }
+
+            resamp->time                                -= phases;
+            frames--;
+         }
+
+         {
+            const float *buffer[channels];
+            for (channel = 0; channel < channels; ++channel)
+            {
+               buffer[channel] = resamp->buffer[channel] + resamp->ptr;
+            }
+            unsigned taps            = resamp->taps;
+            while (resamp->time < phases)
+            {
+               unsigned i;
+               unsigned phase           = resamp->time >> resamp->subphase_bits;
+               float *phase_table       = resamp->phase_table + phase * taps;
+
+               __m128 sums[channels];
+               for (channel = 0; channel < channels; channel++)
+               {
+                  sums[channel] = _mm_setzero_ps();
+               }
+
+               for (i = 0; i < taps; i += 4)
+               {
+                  __m128 _sinc = _mm_load_ps((const float*)phase_table + i);
+                  for (channel = 0; channel < channels; ++channel)
+                  {
+                     __m128 buf = _mm_loadu_ps(buffer[channel] + i);
+                     sums[channel] = _mm_add_ps(sums[channel], _mm_mul_ps(buf, _sinc));
+                  }
+               }
+
+               for (channel = 0; channel < channels; ++channel)
+               {
+                  __m128 v = sums[channel];
+                  __m128 shuf = _mm_shuffle_ps(v, v, _MM_SHUFFLE(2, 3, 0, 1));
+                  __m128 sums = _mm_add_ps(v, shuf);
+                  shuf = _mm_movehl_ps(shuf, sums);
+                  sums = _mm_add_ps(sums, shuf);
+                  output[channel] = _mm_cvtss_f32(sums);
+               }
+
+               output += 2;
+               out_frames++;
+               resamp->time += ratio;
+            }
+         }
+      }
+   }
+
+   data->output_frames = out_frames;
+}
+#endif
+
+static void resampler_sinc_process_c_kaiser(void *re_, struct resampler_data *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)re_;
+   unsigned phases                = 1 << (resamp->phase_bits + resamp->subphase_bits);
+
+   uint32_t ratio                 = phases / data->ratio;
+   const float *input             = data->data_in;
+   float *output                  = data->data_out;
+   size_t frames                  = data->input_frames;
+   size_t out_frames              = 0;
+   size_t channel;
+   size_t channels                = resamp->channels;
+
+   {
+      while (frames)
+      {
+         while (frames && resamp->time >= phases)
+         {
+            /* Push in reverse to make filter more obvious. */
+            if (!resamp->ptr)
+               resamp->ptr = resamp->taps;
+            resamp->ptr--;
+
+            for (channel = 0; channel < channels; channel++)
+            {
+               resamp->buffer[channel][resamp->ptr + resamp->taps]    =
+                  resamp->buffer[channel][resamp->ptr]                = *input++;
+            }
+
+            resamp->time                                   -= phases;
+            frames--;
+         }
+
+         {
+            const float *buffer[channels];
+            for (channel = 0; channel < channels; channel++)
+            {
+               buffer[channel] = resamp->buffer[channel] + resamp->ptr;
+            }
+            unsigned taps            = resamp->taps;
+            while (resamp->time < phases)
+            {
+               unsigned i;
+               float sums[channels];
+               unsigned phase           = resamp->time >> resamp->subphase_bits;
+               float *phase_table       = resamp->phase_table + phase * taps * 2;
+               float *delta_table       = phase_table + taps;
+               float delta              = (float)
+                  (resamp->time & resamp->subphase_mask) * resamp->subphase_mod;
+                
+               for (channel = 0; channel < channels; channel++)
+               {
+                  sums[channel] = 0.0f;
+               }
+
+               for (i = 0; i < taps; i++)
+               {
+                  float sinc_val        = phase_table[i] + delta_table[i] * delta;
+
+                  for (channel = 0; channel < channels; channel++)
+                  {
+                     sums[channel]     += buffer[channel][i] * sinc_val;
+                  }
+               }
+
+               for (channel = 0; channel < channels; channel++)
+               {
+                  output[channel] = sums[channel];
+               }
+
+               output                  += channels;
+               out_frames++;
+               resamp->time            += ratio;
+            }
+         }
+
+      }
+   }
+
+   data->output_frames = out_frames;
+}
+
+static void resampler_sinc_process_c(void *re_, struct resampler_data *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)re_;
+   unsigned phases                = 1 << (resamp->phase_bits + resamp->subphase_bits);
+
+   uint32_t ratio                 = phases / data->ratio;
+   const float *input             = data->data_in;
+   float *output                  = data->data_out;
+   size_t frames                  = data->input_frames;
+   size_t out_frames              = 0;
+   size_t channel;
+   size_t channels                = resamp->channels;
+
+   {
+      while (frames)
+      {
+         while (frames && resamp->time >= phases)
+         {
+            /* Push in reverse to make filter more obvious. */
+            if (!resamp->ptr)
+               resamp->ptr = resamp->taps;
+            resamp->ptr--;
+
+            for (channel = 0; channel < channels; channel++)
+            {
+               resamp->buffer[channel][resamp->ptr + resamp->taps]    =
+                  resamp->buffer[channel][resamp->ptr]                = *input++;
+            }
+
+            resamp->time                                   -= phases;
+            frames--;
+         }
+
+         {
+            const float *buffer[channels];
+            for (channel = 0; channel < channels; channel++)
+            {
+               buffer[channel] = resamp->buffer[channel] + resamp->ptr;
+            }
+            unsigned taps            = resamp->taps;
+            while (resamp->time < phases)
+            {
+               unsigned i;
+               float sums[channels];
+               unsigned phase           = resamp->time >> resamp->subphase_bits;
+               float *phase_table       = resamp->phase_table + phase * taps;
+
+               for (channel = 0; channel < channels; channel++)
+               {
+                  sums[channel] = 0.0f;
+               }
+
+               for (i = 0; i < taps; i++)
+               {
+                  float sinc_val        = phase_table[i];
+
+                  for (channel = 0; channel < channels; channel++)
+                  {
+                     sums[channel]     += buffer[channel][i] * sinc_val;
+                  }
+               }
+
+               for (channel = 0; channel < channels; channel++)
+               {
+                  output[channel]       = sums[channel];
+               }
+
+               output                  += channels;
+               out_frames++;
+               resamp->time            += ratio;
+            }
+         }
+
+      }
+   }
+
+   data->output_frames = out_frames;
+}
+
+static size_t resampler_sinc_latency(void *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)data;
+   return resamp->taps / 2;
+}
+
+static void resampler_sinc_free(void *data)
+{
+   rarch_sinc_resampler_t *resamp = (rarch_sinc_resampler_t*)data;
+   if (resamp) {
+      memalign_free(resamp->main_buffer);
+      free(resamp->buffer);
+   }
+   free(resamp);
+}
+
+static void sinc_init_table_kaiser(rarch_sinc_resampler_t *resamp,
+      double cutoff,
+      float *phase_table, int phases, int taps, bool calculate_delta)
+{
+   int i, j;
+   double    window_mod = kaiser_window_function(0.0, resamp->kaiser_beta); /* Need to normalize w(0) to 1.0. */
+   int           stride = calculate_delta ? 2 : 1;
+   double     sidelobes = taps / 2.0;
+
+   for (i = 0; i < phases; i++)
+   {
+      for (j = 0; j < taps; j++)
+      {
+         double sinc_phase;
+         float val;
+         int               n = j * phases + i;
+         double window_phase = (double)n / (phases * taps); /* [0, 1). */
+         window_phase        = 2.0 * window_phase - 1.0; /* [-1, 1) */
+         sinc_phase          = sidelobes * window_phase;
+         val                 = cutoff * sinc(M_PI * sinc_phase * cutoff) *
+            kaiser_window_function(window_phase, resamp->kaiser_beta) / window_mod;
+         phase_table[i * stride * taps + j] = val;
+      }
+   }
+
+   if (calculate_delta)
+   {
+      int phase;
+      int p;
+
+      for (p = 0; p < phases - 1; p++)
+      {
+         for (j = 0; j < taps; j++)
+         {
+            float delta = phase_table[(p + 1) * stride * taps + j] -
+               phase_table[p * stride * taps + j];
+            phase_table[(p * stride + 1) * taps + j] = delta;
+         }
+      }
+
+      phase = phases - 1;
+      for (j = 0; j < taps; j++)
+      {
+         float val, delta;
+         double sinc_phase;
+         int n               = j * phases + (phase + 1);
+         double window_phase = (double)n / (phases * taps); /* (0, 1]. */
+         window_phase        = 2.0 * window_phase - 1.0; /* (-1, 1] */
+         sinc_phase          = sidelobes * window_phase;
+
+         val                 = cutoff * sinc(M_PI * sinc_phase * cutoff) *
+            kaiser_window_function(window_phase, resamp->kaiser_beta) / window_mod;
+         delta = (val - phase_table[phase * stride * taps + j]);
+         phase_table[(phase * stride + 1) * taps + j] = delta;
+      }
+   }
+}
+
+static void sinc_init_table_lanczos(
+      rarch_sinc_resampler_t *resamp, double cutoff,
+      float *phase_table, int phases, int taps, bool calculate_delta)
+{
+   int i, j;
+   double    window_mod = lanzcos_window_function(0.0); /* Need to normalize w(0) to 1.0. */
+   int           stride = calculate_delta ? 2 : 1;
+   double     sidelobes = taps / 2.0;
+
+   for (i = 0; i < phases; i++)
+   {
+      for (j = 0; j < taps; j++)
+      {
+         double sinc_phase;
+         float val;
+         int               n = j * phases + i;
+         double window_phase = (double)n / (phases * taps); /* [0, 1). */
+         window_phase        = 2.0 * window_phase - 1.0; /* [-1, 1) */
+         sinc_phase          = sidelobes * window_phase;
+         val                 = cutoff * sinc(M_PI * sinc_phase * cutoff) *
+            lanzcos_window_function(window_phase) / window_mod;
+         phase_table[i * stride * taps + j] = val;
+      }
+   }
+
+   if (calculate_delta)
+   {
+      int phase;
+      int p;
+
+      for (p = 0; p < phases - 1; p++)
+      {
+         for (j = 0; j < taps; j++)
+         {
+            float delta = phase_table[(p + 1) * stride * taps + j] -
+               phase_table[p * stride * taps + j];
+            phase_table[(p * stride + 1) * taps + j] = delta;
+         }
+      }
+
+      phase = phases - 1;
+      for (j = 0; j < taps; j++)
+      {
+         float val, delta;
+         double sinc_phase;
+         int n               = j * phases + (phase + 1);
+         double window_phase = (double)n / (phases * taps); /* (0, 1]. */
+         window_phase        = 2.0 * window_phase - 1.0; /* (-1, 1] */
+         sinc_phase          = sidelobes * window_phase;
+
+         val                 = cutoff * sinc(M_PI * sinc_phase * cutoff) *
+            lanzcos_window_function(window_phase) / window_mod;
+         delta = (val - phase_table[phase * stride * taps + j]);
+         phase_table[(phase * stride + 1) * taps + j] = delta;
+      }
+   }
+}
+
+static void *resampler_sinc_new(const struct resampler_config *config,
+      double bandwidth_mod, enum resampler_quality quality,
+      size_t channels, resampler_simd_mask_t mask)
+{
+   double cutoff                  = 0.0;
+   size_t phase_elems             = 0;
+   size_t elems                   = 0;
+   size_t channel;
+   unsigned enable_avx            = 0;
+   unsigned sidelobes             = 0;
+   enum sinc_window window_type   = SINC_WINDOW_NONE;
+   rarch_sinc_resampler_t *re     = (rarch_sinc_resampler_t*)
+      calloc(1, sizeof(*re));
+
+   if (!re)
+      return NULL;
+
+   switch (quality)
+   {
+      case RESAMPLER_QUALITY_LOWEST:
+         cutoff            = 0.98;
+         sidelobes         = 2;
+         re->phase_bits    = 12;
+         re->subphase_bits = 10;
+         window_type       = SINC_WINDOW_LANCZOS;
+         break;
+      case RESAMPLER_QUALITY_LOWER:
+         cutoff            = 0.98;
+         sidelobes         = 4;
+         re->phase_bits    = 12;
+         re->subphase_bits = 10;
+         window_type       = SINC_WINDOW_LANCZOS;
+         break;
+      case RESAMPLER_QUALITY_HIGHER:
+         cutoff            = 0.90;
+         sidelobes         = 32;
+         re->phase_bits    = 10;
+         re->subphase_bits = 14;
+         window_type       = SINC_WINDOW_KAISER;
+         re->kaiser_beta   = 10.5;
+         enable_avx        = 1;
+         break;
+      case RESAMPLER_QUALITY_HIGHEST:
+         cutoff            = 0.962;
+         sidelobes         = 128;
+         re->phase_bits    = 10;
+         re->subphase_bits = 14;
+         window_type       = SINC_WINDOW_KAISER;
+         re->kaiser_beta   = 14.5;
+         enable_avx        = 1;
+         break;
+      case RESAMPLER_QUALITY_NORMAL:
+      case RESAMPLER_QUALITY_DONTCARE:
+         cutoff            = 0.825;
+         sidelobes         = 8;
+         re->phase_bits    = 8;
+         re->subphase_bits = 16;
+         window_type       = SINC_WINDOW_KAISER;
+         re->kaiser_beta   = 5.5;
+         break;
+   }
+
+   re->subphase_mask = (1 << re->subphase_bits) - 1;
+   re->subphase_mod  = 1.0f / (1 << re->subphase_bits);
+   re->taps          = sidelobes * 2;
+   re->channels      = channels;
+
+   /* Downsampling, must lower cutoff, and extend number of
+    * taps accordingly to keep same stopband attenuation. */
+   if (bandwidth_mod < 1.0)
+   {
+      cutoff *= bandwidth_mod;
+      re->taps = (unsigned)ceil(re->taps / bandwidth_mod);
+   }
+
+   /* Be SIMD-friendly. */
+#if defined(__AVX__)
+   if (enable_avx)
+      re->taps  = (re->taps + 7) & ~7;
+   else
+#endif
+   {
+#if (defined(__ARM_NEON__) || defined(HAVE_NEON))
+      re->taps     = (re->taps + 7) & ~7;
+#else
+      re->taps     = (re->taps + 3) & ~3;
+#endif
+   }
+
+   phase_elems     = ((1 << re->phase_bits) * re->taps);
+   if (window_type == SINC_WINDOW_KAISER)
+      phase_elems  = phase_elems * 2;
+   elems           = phase_elems + 2 * re->taps * channels;
+
+   re->main_buffer = (float*)memalign_alloc(128, sizeof(float) * elems);
+   if (!re->main_buffer)
+      goto error;
+    
+   re->buffer      = (float**)malloc(sizeof(float*) * channels);
+   if (!re->buffer)
+      goto error;
+
+   memset(re->main_buffer, 0, sizeof(float) * elems);
+
+   re->phase_table     = re->main_buffer;
+   re->buffer[0]       = re->main_buffer + phase_elems;
+   for (channel = 1; channel < channels; ++channel)
+   {
+      re->buffer[channel] = re->buffer[channel - 1] + 2 * re->taps;
+   }
+
+   switch (window_type)
+   {
+      case SINC_WINDOW_LANCZOS:
+         sinc_init_table_lanczos(re, cutoff, re->phase_table,
+               1 << re->phase_bits, re->taps, false);
+         break;
+      case SINC_WINDOW_KAISER:
+         sinc_init_table_kaiser(re, cutoff, re->phase_table,
+               1 << re->phase_bits, re->taps, true);
+         break;
+      case SINC_WINDOW_NONE:
+         goto error;
+   }
+
+   sinc_resampler.process = resampler_sinc_process_c;
+   if (window_type == SINC_WINDOW_KAISER)
+      sinc_resampler.process    = resampler_sinc_process_c_kaiser;
+
+   if (mask & RESAMPLER_SIMD_AVX && enable_avx)
+   {
+#if defined(__AVX__)
+      sinc_resampler.process    = resampler_sinc_process_avx;
+      if (window_type == SINC_WINDOW_KAISER)
+         sinc_resampler.process = resampler_sinc_process_avx_kaiser;
+#endif
+   }
+   else if (mask & RESAMPLER_SIMD_SSE)
+   {
+#if defined(__SSE__)
+      sinc_resampler.process = resampler_sinc_process_sse;
+      if (window_type == SINC_WINDOW_KAISER)
+         sinc_resampler.process = resampler_sinc_process_sse_kaiser;
+#endif
+   }
+   else if (mask & RESAMPLER_SIMD_NEON)
+   {
+#if (defined(__ARM_NEON__) || defined(HAVE_NEON))
+      sinc_resampler.process = resampler_sinc_process_neon;
+      if (window_type == SINC_WINDOW_KAISER)
+         sinc_resampler.process = resampler_sinc_process_neon_kaiser;
+#endif
+   }
+
+   return re;
+
+error:
+   resampler_sinc_free(re);
+   return NULL;
+}
+
+retro_resampler_t sinc_resampler = {
+   resampler_sinc_new,
+   resampler_sinc_process_c,
+   resampler_sinc_free,
+   resampler_sinc_latency,
+   RESAMPLER_API_VERSION,
+   "sinc",
+   "sinc"
+};
diff --git a/ThirdParty/RetroArch/libretro-common/encodings/encoding_utf.c b/ThirdParty/RetroArch/libretro-common/encodings/encoding_utf.c
new file mode 100644
index 000000000..2760824d2
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/encodings/encoding_utf.c
@@ -0,0 +1,512 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (encoding_utf.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+
+#include <boolean.h>
+#include <compat/strl.h>
+#include <retro_inline.h>
+
+#include <encodings/utf.h>
+
+#if defined(_WIN32) && !defined(_XBOX)
+#include <windows.h>
+#elif defined(_XBOX)
+#include <xtl.h>
+#endif
+
+#define UTF8_WALKBYTE(string) (*((*(string))++))
+
+static unsigned leading_ones(uint8_t c)
+{
+   unsigned ones = 0;
+   while (c & 0x80)
+   {
+      ones++;
+      c <<= 1;
+   }
+
+   return ones;
+}
+
+/* Simple implementation. Assumes the sequence is
+ * properly synchronized and terminated. */
+
+size_t utf8_conv_utf32(uint32_t *out, size_t out_chars,
+      const char *in, size_t in_size)
+{
+   unsigned i;
+   size_t ret = 0;
+   while (in_size && out_chars)
+   {
+      unsigned extra, shift;
+      uint32_t c;
+      uint8_t first = *in++;
+      unsigned ones = leading_ones(first);
+
+      if (ones > 6 || ones == 1) /* Invalid or desync. */
+         break;
+
+      extra = ones ? ones - 1 : ones;
+      if (1 + extra > in_size) /* Overflow. */
+         break;
+
+      shift = (extra - 1) * 6;
+      c     = (first & ((1 << (7 - ones)) - 1)) << (6 * extra);
+
+      for (i = 0; i < extra; i++, in++, shift -= 6)
+         c |= (*in & 0x3f) << shift;
+
+      *out++ = c;
+      in_size -= 1 + extra;
+      out_chars--;
+      ret++;
+   }
+
+   return ret;
+}
+
+bool utf16_conv_utf8(uint8_t *out, size_t *out_chars,
+     const uint16_t *in, size_t in_size)
+{
+   size_t out_pos            = 0;
+   size_t in_pos             = 0;
+   static const 
+      uint8_t utf8_limits[5] = { 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
+
+   for (;;)
+   {
+      unsigned num_adds;
+      uint32_t value;
+
+      if (in_pos == in_size)
+      {
+         *out_chars = out_pos;
+         return true;
+      }
+      value = in[in_pos++];
+      if (value < 0x80)
+      {
+         if (out)
+            out[out_pos] = (char)value;
+         out_pos++;
+         continue;
+      }
+
+      if (value >= 0xD800 && value < 0xE000)
+      {
+         uint32_t c2;
+
+         if (value >= 0xDC00 || in_pos == in_size)
+            break;
+         c2 = in[in_pos++];
+         if (c2 < 0xDC00 || c2 >= 0xE000)
+            break;
+         value = (((value - 0xD800) << 10) | (c2 - 0xDC00)) + 0x10000;
+      }
+
+      for (num_adds = 1; num_adds < 5; num_adds++)
+         if (value < (((uint32_t)1) << (num_adds * 5 + 6)))
+            break;
+      if (out)
+         out[out_pos] = (char)(utf8_limits[num_adds - 1]
+               + (value >> (6 * num_adds)));
+      out_pos++;
+      do
+      {
+         num_adds--;
+         if (out)
+            out[out_pos] = (char)(0x80
+                  + ((value >> (6 * num_adds)) & 0x3F));
+         out_pos++;
+      }while (num_adds != 0);
+   }
+
+   *out_chars = out_pos;
+   return false;
+}
+
+/* Acts mostly like strlcpy.
+ *
+ * Copies the given number of UTF-8 characters,
+ * but at most d_len bytes.
+ *
+ * Always NULL terminates.
+ * Does not copy half a character.
+ *
+ * Returns number of bytes. 's' is assumed valid UTF-8.
+ * Use only if 'chars' is considerably less than 'd_len'. */
+size_t utf8cpy(char *d, size_t d_len, const char *s, size_t chars)
+{
+   const uint8_t *sb     = (const uint8_t*)s;
+   const uint8_t *sb_org = sb;
+
+   if (!s)
+      return 0;
+
+   while (*sb && chars-- > 0)
+   {
+      sb++;
+      while ((*sb & 0xC0) == 0x80)
+         sb++;
+   }
+
+   if ((size_t)(sb - sb_org) > d_len-1 /* NUL */)
+   {
+      sb = sb_org + d_len-1;
+      while ((*sb & 0xC0) == 0x80)
+         sb--;
+   }
+
+   memcpy(d, sb_org, sb-sb_org);
+   d[sb-sb_org] = '\0';
+
+   return sb-sb_org;
+}
+
+const char *utf8skip(const char *str, size_t chars)
+{
+   const uint8_t *strb = (const uint8_t*)str;
+
+   if (!chars)
+      return str;
+
+   do
+   {
+      strb++;
+      while ((*strb & 0xC0)==0x80)
+         strb++;
+      chars--;
+   }while (chars);
+
+   return (const char*)strb;
+}
+
+size_t utf8len(const char *string)
+{
+   size_t ret = 0;
+
+   if (!string)
+      return 0;
+
+   while (*string)
+   {
+      if ((*string & 0xC0) != 0x80)
+         ret++;
+      string++;
+   }
+   return ret;
+}
+
+/* Does not validate the input, returns garbage if it's not UTF-8. */
+uint32_t utf8_walk(const char **string)
+{
+   uint8_t first = UTF8_WALKBYTE(string);
+   uint32_t ret  = 0;
+
+   if (first < 128)
+      return first;
+
+   ret    = (ret << 6) | (UTF8_WALKBYTE(string) & 0x3F);
+   if (first >= 0xE0)
+   {
+      ret = (ret << 6) | (UTF8_WALKBYTE(string) & 0x3F);
+      if (first >= 0xF0)
+      {
+         ret = (ret << 6) | (UTF8_WALKBYTE(string) & 0x3F);
+         return ret | (first & 7) << 18;
+      }
+      return ret | (first & 15) << 12;
+   }
+
+   return ret | (first & 31) << 6;
+}
+
+static bool utf16_to_char(uint8_t **utf_data,
+      size_t *dest_len, const uint16_t *in)
+{
+   unsigned len    = 0;
+
+   while (in[len] != '\0')
+      len++;
+
+   utf16_conv_utf8(NULL, dest_len, in, len);
+   *dest_len  += 1;
+   *utf_data   = (uint8_t*)malloc(*dest_len);
+   if (*utf_data == 0)
+      return false;
+
+   return utf16_conv_utf8(*utf_data, dest_len, in, len);
+}
+
+bool utf16_to_char_string(const uint16_t *in, char *s, size_t len)
+{
+   size_t     dest_len  = 0;
+   uint8_t *utf16_data  = NULL;
+   bool            ret  = utf16_to_char(&utf16_data, &dest_len, in);
+
+   if (ret)
+   {
+      utf16_data[dest_len] = 0;
+      strlcpy(s, (const char*)utf16_data, len);
+   }
+
+   free(utf16_data);
+   utf16_data = NULL;
+
+   return ret;
+}
+
+#if defined(_WIN32) && !defined(_XBOX) && !defined(UNICODE)
+/* Returned pointer MUST be freed by the caller if non-NULL. */
+static char *mb_to_mb_string_alloc(const char *str,
+      enum CodePage cp_in, enum CodePage cp_out)
+{
+   wchar_t *path_buf_wide = NULL;
+   int path_buf_wide_len  = MultiByteToWideChar(cp_in, 0, str, -1, NULL, 0);
+
+   /* Windows 95 will return 0 from these functions with 
+    * a UTF8 codepage set without MSLU.
+    *
+    * From an unknown MSDN version (others omit this info):
+    *   - CP_UTF8 Windows 98/Me, Windows NT 4.0 and later: 
+    *   Translate using UTF-8. When this is set, dwFlags must be zero.
+    *   - Windows 95: Under the Microsoft Layer for Unicode, 
+    *   MultiByteToWideChar also supports CP_UTF7 and CP_UTF8.
+    */
+
+   if (!path_buf_wide_len)
+      return strdup(str);
+
+   path_buf_wide = (wchar_t*)
+      calloc(path_buf_wide_len + sizeof(wchar_t), sizeof(wchar_t));
+
+   if (path_buf_wide)
+   {
+      MultiByteToWideChar(cp_in, 0,
+            str, -1, path_buf_wide, path_buf_wide_len);
+
+      if (*path_buf_wide)
+      {
+         int path_buf_len = WideCharToMultiByte(cp_out, 0,
+               path_buf_wide, -1, NULL, 0, NULL, NULL);
+
+         if (path_buf_len)
+         {
+            char *path_buf = (char*)
+               calloc(path_buf_len + sizeof(char), sizeof(char));
+
+            if (path_buf)
+            {
+               WideCharToMultiByte(cp_out, 0,
+                     path_buf_wide, -1, path_buf,
+                     path_buf_len, NULL, NULL);
+
+               free(path_buf_wide);
+
+               if (*path_buf)
+                  return path_buf;
+
+               free(path_buf);
+               return NULL;
+            }
+         }
+         else
+         {
+            free(path_buf_wide);
+            return strdup(str);
+         }
+      }
+
+      free(path_buf_wide);
+   }
+
+   return NULL;
+}
+#endif
+
+/* Returned pointer MUST be freed by the caller if non-NULL. */
+char* utf8_to_local_string_alloc(const char *str)
+{
+   if (str && *str)
+   {
+#if defined(_WIN32) && !defined(_XBOX) && !defined(UNICODE)
+      return mb_to_mb_string_alloc(str, CODEPAGE_UTF8, CODEPAGE_LOCAL);
+#else
+      /* assume string needs no modification if not on Windows */
+      return strdup(str);
+#endif
+   }
+   return NULL;
+}
+
+/* Returned pointer MUST be freed by the caller if non-NULL. */
+char* local_to_utf8_string_alloc(const char *str)
+{
+   if (str && *str)
+   {
+#if defined(_WIN32) && !defined(_XBOX) && !defined(UNICODE)
+      return mb_to_mb_string_alloc(str, CODEPAGE_LOCAL, CODEPAGE_UTF8);
+#else
+      /* assume string needs no modification if not on Windows */
+      return strdup(str);
+#endif
+   }
+   return NULL;
+}
+
+/* Returned pointer MUST be freed by the caller if non-NULL. */
+wchar_t* utf8_to_utf16_string_alloc(const char *str)
+{
+#ifdef _WIN32
+   int len        = 0;
+   int out_len    = 0;
+#else
+   size_t len     = 0;
+   size_t out_len = 0;
+#endif
+   wchar_t *buf   = NULL;
+
+   if (!str || !*str)
+      return NULL;
+
+#ifdef _WIN32
+   len = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
+
+   if (len)
+   {
+      buf = (wchar_t*)calloc(len, sizeof(wchar_t));
+
+      if (!buf)
+         return NULL;
+
+      out_len = MultiByteToWideChar(CP_UTF8, 0, str, -1, buf, len);
+   }
+   else
+   {
+      /* fallback to ANSI codepage instead */
+      len = MultiByteToWideChar(CP_ACP, 0, str, -1, NULL, 0);
+
+      if (len)
+      {
+         buf = (wchar_t*)calloc(len, sizeof(wchar_t));
+
+         if (!buf)
+            return NULL;
+
+         out_len = MultiByteToWideChar(CP_ACP, 0, str, -1, buf, len);
+      }
+   }
+
+   if (out_len < 0)
+   {
+      free(buf);
+      return NULL;
+   }
+#else
+   /* NOTE: For now, assume non-Windows platforms' locale is already UTF-8. */
+   len = mbstowcs(NULL, str, 0) + 1;
+
+   if (len)
+   {
+      buf = (wchar_t*)calloc(len, sizeof(wchar_t));
+
+      if (!buf)
+         return NULL;
+
+      out_len = mbstowcs(buf, str, len);
+   }
+
+   if (out_len == (size_t)-1)
+   {
+      free(buf);
+      return NULL;
+   }
+#endif
+
+   return buf;
+}
+
+/* Returned pointer MUST be freed by the caller if non-NULL. */
+char* utf16_to_utf8_string_alloc(const wchar_t *str)
+{
+#ifdef _WIN32
+   int len        = 0;
+#else
+   size_t len     = 0;
+#endif
+   char *buf      = NULL;
+
+   if (!str || !*str)
+      return NULL;
+
+#ifdef _WIN32
+   {
+      UINT code_page = CP_UTF8;
+      len            = WideCharToMultiByte(code_page,
+            0, str, -1, NULL, 0, NULL, NULL);
+
+      /* fallback to ANSI codepage instead */
+      if (!len)
+      {
+         code_page   = CP_ACP;
+         len         = WideCharToMultiByte(code_page,
+               0, str, -1, NULL, 0, NULL, NULL);
+      }
+
+      buf = (char*)calloc(len, sizeof(char));
+
+      if (!buf)
+         return NULL;
+
+      if (WideCharToMultiByte(code_page,
+            0, str, -1, buf, len, NULL, NULL) < 0)
+      {
+         free(buf);
+         return NULL;
+      }
+   }
+#else
+   /* NOTE: For now, assume non-Windows platforms' 
+    * locale is already UTF-8. */
+   len = wcstombs(NULL, str, 0) + 1;
+
+   if (len)
+   {
+      buf = (char*)calloc(len, sizeof(char));
+
+      if (!buf)
+         return NULL;
+
+      if (wcstombs(buf, str, len) == (size_t)-1)
+      {
+         free(buf);
+         return NULL;
+      }
+   }
+#endif
+
+   return buf;
+}
diff --git a/ThirdParty/RetroArch/libretro-common/features/features_cpu.c b/ThirdParty/RetroArch/libretro-common/features/features_cpu.c
new file mode 100644
index 000000000..9bb11a29a
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/features/features_cpu.c
@@ -0,0 +1,877 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (features_cpu.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if defined(_WIN32)
+#include <direct.h>
+#else
+#include <unistd.h>
+#endif
+
+#include <compat/strl.h>
+#include <streams/file_stream.h>
+#include <libretro.h>
+#include <features/features_cpu.h>
+#include <retro_timers.h>
+
+#if defined(_WIN32) && !defined(_XBOX)
+#include <windows.h>
+#endif
+
+#ifdef __PSL1GHT__
+#include <lv2/systime.h>
+#endif
+
+#if defined(_XBOX360)
+#include <PPCIntrinsics.h>
+#elif !defined(__MACH__) && (defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__) || defined(__PPC64__) || defined(__powerpc64__))
+#ifndef _PPU_INTRINSICS_H	
+#include <ppu_intrinsics.h>	
+#endif
+#elif defined(_POSIX_MONOTONIC_CLOCK) || defined(ANDROID) || defined(__QNX__) || defined(DJGPP)
+/* POSIX_MONOTONIC_CLOCK is not being defined in Android headers despite support being present. */
+#include <time.h>
+#endif
+
+#if defined(__QNX__) && !defined(CLOCK_MONOTONIC)
+#define CLOCK_MONOTONIC 2
+#endif
+
+#if defined(PSP)
+#include <pspkernel.h>
+#endif
+
+#if defined(PSP) || defined(__PSL1GHT__)
+#include <sys/time.h>
+#endif
+
+#if defined(PSP)
+#include <psprtc.h>
+#endif
+
+#if defined(VITA)
+#include <psp2/kernel/processmgr.h>
+#include <psp2/rtc.h>
+#endif
+
+#if defined(PS2)
+#include <ps2sdkapi.h>
+#endif
+
+#if !defined(__PSL1GHT__) && defined(__PS3__)
+#include <sys/sys_time.h>
+#endif
+
+#ifdef GEKKO
+#include <ogc/lwp_watchdog.h>
+#endif
+
+#ifdef WIIU
+#include <wiiu/os/time.h>
+#endif
+
+#if defined(HAVE_LIBNX)
+#include <switch.h>
+#elif defined(SWITCH)
+#include <libtransistor/types.h>
+#include <libtransistor/svc.h>
+#endif
+
+#if defined(_3DS)
+#include <3ds/svc.h>
+#include <3ds/os.h>
+#include <3ds/services/cfgu.h>
+#endif
+
+/* iOS/OSX specific. Lacks clock_gettime(), so implement it. */
+#ifdef __MACH__
+#include <sys/time.h>
+
+#ifndef CLOCK_MONOTONIC
+#define CLOCK_MONOTONIC 0
+#endif
+
+#ifndef CLOCK_REALTIME
+#define CLOCK_REALTIME 0
+#endif
+
+/* this function is part of iOS 10 now */
+static int ra_clock_gettime(int clk_ik, struct timespec *t)
+{
+   struct timeval now;
+   int rv = gettimeofday(&now, NULL);
+   if (rv)
+      return rv;
+   t->tv_sec  = now.tv_sec;
+   t->tv_nsec = now.tv_usec * 1000;
+   return 0;
+}
+#endif
+
+#if defined(__MACH__) && __IPHONE_OS_VERSION_MIN_REQUIRED < 100000
+#else
+#define ra_clock_gettime clock_gettime
+#endif
+
+#ifdef EMSCRIPTEN
+#include <emscripten.h>
+#endif
+
+#if defined(BSD) || defined(__APPLE__)
+#include <sys/sysctl.h>
+#endif
+
+#include <string.h>
+
+/**
+ * cpu_features_get_perf_counter:
+ *
+ * Gets performance counter.
+ *
+ * Returns: performance counter.
+ **/
+retro_perf_tick_t cpu_features_get_perf_counter(void)
+{
+   retro_perf_tick_t time_ticks = 0;
+#if defined(_WIN32)
+   long tv_sec, tv_usec;
+#if defined(_MSC_VER) && _MSC_VER <= 1200
+   static const unsigned __int64 epoch = 11644473600000000;
+#else
+   static const unsigned __int64 epoch = 11644473600000000ULL;
+#endif
+   FILETIME file_time;
+   SYSTEMTIME system_time;
+   ULARGE_INTEGER ularge;
+
+   GetSystemTime(&system_time);
+   SystemTimeToFileTime(&system_time, &file_time);
+   ularge.LowPart  = file_time.dwLowDateTime;
+   ularge.HighPart = file_time.dwHighDateTime;
+
+   tv_sec     = (long)((ularge.QuadPart - epoch) / 10000000L);
+   tv_usec    = (long)(system_time.wMilliseconds * 1000);
+   time_ticks = (1000000 * tv_sec + tv_usec);
+#elif defined(GEKKO)
+   time_ticks = gettime();
+#elif !defined(__MACH__) && (defined(_XBOX360) || defined(__powerpc__) || defined(__ppc__) || defined(__POWERPC__) || defined(__PSL1GHT__) || defined(__PPC64__) || defined(__powerpc64__))
+   time_ticks = __mftb();
+#elif (defined(_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK > 0) || defined(__QNX__) || defined(ANDROID)
+   struct timespec tv = {0};
+   if (ra_clock_gettime(CLOCK_MONOTONIC, &tv) == 0)
+      time_ticks = (retro_perf_tick_t)tv.tv_sec * 1000000000 +
+         (retro_perf_tick_t)tv.tv_nsec;
+
+#elif defined(__GNUC__) && defined(__i386__) || defined(__i486__) || defined(__i686__) || defined(_M_X64) || defined(_M_AMD64)
+   __asm__ volatile ("rdtsc" : "=A" (time_ticks));
+#elif defined(__GNUC__) && defined(__x86_64__) || defined(_M_IX86)
+   unsigned a, d;
+   __asm__ volatile ("rdtsc" : "=a" (a), "=d" (d));
+   time_ticks = (retro_perf_tick_t)a | ((retro_perf_tick_t)d << 32);
+#elif defined(__ARM_ARCH_6__)
+   __asm__ volatile( "mrc p15, 0, %0, c9, c13, 0" : "=r"(time_ticks) );
+#elif defined(__aarch64__)
+   __asm__ volatile( "mrs %0, cntvct_el0" : "=r"(time_ticks) );
+#elif defined(PSP) || defined(VITA)
+   time_ticks = sceKernelGetSystemTimeWide();
+#elif defined(PS2)
+   time_ticks = ps2_clock();
+#elif defined(_3DS)
+   time_ticks = svcGetSystemTick();
+#elif defined(WIIU)
+   time_ticks = OSGetSystemTime();
+#elif defined(HAVE_LIBNX)
+   time_ticks = armGetSystemTick();
+#elif defined(EMSCRIPTEN)
+   time_ticks = emscripten_get_now() * 1000;
+#endif
+
+   return time_ticks;
+}
+
+/**
+ * cpu_features_get_time_usec:
+ *
+ * Gets time in microseconds.
+ *
+ * Returns: time in microseconds.
+ **/
+retro_time_t cpu_features_get_time_usec(void)
+{
+#if defined(_WIN32)
+   static LARGE_INTEGER freq;
+   LARGE_INTEGER count;
+
+   /* Frequency is guaranteed to not change. */
+   if (!freq.QuadPart && !QueryPerformanceFrequency(&freq))
+      return 0;
+
+   if (!QueryPerformanceCounter(&count))
+      return 0;
+   return (count.QuadPart / freq.QuadPart * 1000000) + (count.QuadPart % freq.QuadPart * 1000000 / freq.QuadPart);
+#elif defined(__PSL1GHT__)
+   return sysGetSystemTime();
+#elif !defined(__PSL1GHT__) && defined(__PS3__)
+   return sys_time_get_system_time();
+#elif defined(GEKKO)
+   return ticks_to_microsecs(gettime());
+#elif defined(WIIU)
+   return ticks_to_us(OSGetSystemTime());
+#elif defined(SWITCH) || defined(HAVE_LIBNX)
+   return (svcGetSystemTick() * 10) / 192;
+#elif defined(_3DS)
+   return osGetTime() * 1000;
+#elif defined(_POSIX_MONOTONIC_CLOCK) || defined(__QNX__) || defined(ANDROID) || defined(__MACH__) || defined(DJGPP)
+   struct timespec tv = {0};
+   if (ra_clock_gettime(CLOCK_MONOTONIC, &tv) < 0)
+      return 0;
+   return tv.tv_sec * INT64_C(1000000) + (tv.tv_nsec + 500) / 1000;
+#elif defined(EMSCRIPTEN)
+   return emscripten_get_now() * 1000;
+#elif defined(PS2)
+   return ps2_clock() / PS2_CLOCKS_PER_MSEC * 1000;
+#elif defined(VITA) || defined(PSP)
+   return sceKernelGetSystemTimeWide();
+#else
+#error "Your platform does not have a timer function implemented in cpu_features_get_time_usec(). Cannot continue."
+#endif
+}
+
+#if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i686__) || (defined(_M_X64) && _MSC_VER > 1310) || (defined(_M_IX86) && _MSC_VER > 1310)
+#define CPU_X86
+#endif
+
+#if defined(_MSC_VER) && !defined(_XBOX)
+#if (_MSC_VER > 1310)
+#include <intrin.h>
+#endif
+#endif
+
+#if defined(CPU_X86) && !defined(__MACH__)
+void x86_cpuid(int func, int flags[4])
+{
+   /* On Android, we compile RetroArch with PIC, and we
+    * are not allowed to clobber the ebx register. */
+#ifdef __x86_64__
+#define REG_b "rbx"
+#define REG_S "rsi"
+#else
+#define REG_b "ebx"
+#define REG_S "esi"
+#endif
+
+#if defined(__GNUC__)
+   __asm__ volatile (
+         "mov %%" REG_b ", %%" REG_S "\n"
+         "cpuid\n"
+         "xchg %%" REG_b ", %%" REG_S "\n"
+         : "=a"(flags[0]), "=S"(flags[1]), "=c"(flags[2]), "=d"(flags[3])
+         : "a"(func));
+#elif defined(_MSC_VER)
+   __cpuid(flags, func);
+#else
+#ifndef NDEBUG
+   printf("Unknown compiler. Cannot check CPUID with inline assembly.\n");
+#endif
+   memset(flags, 0, 4 * sizeof(int));
+#endif
+}
+
+/* Only runs on i686 and above. Needs to be conditionally run. */
+static uint64_t xgetbv_x86(uint32_t idx)
+{
+#if defined(__GNUC__)
+   uint32_t eax, edx;
+   __asm__ volatile (
+         /* Older GCC versions (Apple's GCC for example) do
+          * not understand xgetbv instruction.
+          * Stamp out the machine code directly.
+          */
+         ".byte 0x0f, 0x01, 0xd0\n"
+         : "=a"(eax), "=d"(edx) : "c"(idx));
+   return ((uint64_t)edx << 32) | eax;
+#elif _MSC_FULL_VER >= 160040219
+   /* Intrinsic only works on 2010 SP1 and above. */
+   return _xgetbv(idx);
+#else
+#ifndef NDEBUG
+   printf("Unknown compiler. Cannot check xgetbv bits.\n");
+#endif
+   return 0;
+#endif
+}
+#endif
+
+#if defined(__ARM_NEON__)
+#if defined(__arm__)
+static void arm_enable_runfast_mode(void)
+{
+   /* RunFast mode. Enables flush-to-zero and some
+    * floating point optimizations. */
+   static const unsigned x = 0x04086060;
+   static const unsigned y = 0x03000000;
+   int r;
+   __asm__ volatile(
+         "fmrx	%0, fpscr   \n\t" /* r0 = FPSCR */
+         "and	%0, %0, %1  \n\t" /* r0 = r0 & 0x04086060 */
+         "orr	%0, %0, %2  \n\t" /* r0 = r0 | 0x03000000 */
+         "fmxr	fpscr, %0   \n\t" /* FPSCR = r0 */
+         : "=r"(r)
+         : "r"(x), "r"(y)
+        );
+}
+#endif
+#endif
+
+#if defined(__linux__) && !defined(CPU_X86)
+static unsigned char check_arm_cpu_feature(const char* feature)
+{
+   char line[1024];
+   unsigned char status = 0;
+   RFILE *fp = filestream_open("/proc/cpuinfo",
+         RETRO_VFS_FILE_ACCESS_READ,
+         RETRO_VFS_FILE_ACCESS_HINT_NONE);
+
+   if (!fp)
+      return 0;
+
+   while (filestream_gets(fp, line, sizeof(line)))
+   {
+      if (strncmp(line, "Features\t: ", 11))
+         continue;
+
+      if (strstr(line + 11, feature))
+         status = 1;
+
+      break;
+   }
+
+   filestream_close(fp);
+
+   return status;
+}
+
+#if !defined(_SC_NPROCESSORS_ONLN)
+/* Parse an decimal integer starting from 'input', but not going further
+ * than 'limit'. Return the value into '*result'.
+ *
+ * NOTE: Does not skip over leading spaces, or deal with sign characters.
+ * NOTE: Ignores overflows.
+ *
+ * The function returns NULL in case of error (bad format), or the new
+ * position after the decimal number in case of success (which will always
+ * be <= 'limit').
+ */
+static const char *parse_decimal(const char* input,
+      const char* limit, int* result)
+{
+    const char* p = input;
+    int       val = 0;
+
+    while (p < limit)
+    {
+        int d = (*p - '0');
+        if ((unsigned)d >= 10U)
+            break;
+        val = val*10 + d;
+        p++;
+    }
+    if (p == input)
+        return NULL;
+
+    *result = val;
+    return p;
+}
+
+/* Parse a textual list of cpus and store the result inside a CpuList object.
+ * Input format is the following:
+ * - comma-separated list of items (no spaces)
+ * - each item is either a single decimal number (cpu index), or a range made
+ *   of two numbers separated by a single dash (-). Ranges are inclusive.
+ *
+ * Examples:   0
+ *             2,4-127,128-143
+ *             0-1
+ */
+static void cpulist_parse(CpuList* list, char **buf, ssize_t length)
+{
+   const char* p   = (const char*)buf;
+   const char* end = p + length;
+
+   /* NOTE: the input line coming from sysfs typically contains a
+    * trailing newline, so take care of it in the code below
+    */
+   while (p < end && *p != '\n')
+   {
+      int val, start_value, end_value;
+      /* Find the end of current item, and put it into 'q' */
+      const char *q = (const char*)memchr(p, ',', end-p);
+
+      if (!q)
+         q = end;
+
+      /* Get first value */
+      if (!(p = parse_decimal(p, q, &start_value)))
+         return;
+
+      end_value = start_value;
+
+      /* If we're not at the end of the item, expect a dash and
+       * and integer; extract end value.
+       */
+      if (p < q && *p == '-')
+      {
+         if (!(p = parse_decimal(p+1, q, &end_value)))
+            return;
+      }
+
+      /* Set bits CPU list bits */
+      for (val = start_value; val <= end_value; val++)
+      {
+         if ((unsigned)val < 32)
+            list->mask |= (uint32_t)(UINT32_C(1) << val);
+      }
+
+      /* Jump to next item */
+      p = q;
+      if (p < end)
+         p++;
+   }
+}
+
+/* Read a CPU list from one sysfs file */
+static void cpulist_read_from(CpuList* list, const char* filename)
+{
+   ssize_t length;
+   char *buf  = NULL;
+
+   list->mask = 0;
+
+   if (filestream_read_file(filename, (void**)&buf, &length) != 1)
+      return;
+
+   cpulist_parse(list, &buf, length);
+   if (buf)
+      free(buf);
+   buf = NULL;
+}
+#endif
+
+#endif
+
+/**
+ * cpu_features_get_core_amount:
+ *
+ * Gets the amount of available CPU cores.
+ *
+ * Returns: amount of CPU cores available.
+ **/
+unsigned cpu_features_get_core_amount(void)
+{
+#if defined(_WIN32) && !defined(_XBOX)
+   /* Win32 */
+   SYSTEM_INFO sysinfo;
+#if defined(__WINRT__) || defined(WINAPI_FAMILY) && WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
+   GetNativeSystemInfo(&sysinfo);
+#else
+   GetSystemInfo(&sysinfo);
+#endif
+   return sysinfo.dwNumberOfProcessors;
+#elif defined(GEKKO)
+   return 1;
+#elif defined(PSP) || defined(PS2)
+   return 1;
+#elif defined(__PSL1GHT__) || !defined(__PSL1GHT__) && defined(__PS3__)
+   return 1; /* Only one PPU, SPUs don't really count */
+#elif defined(VITA)
+   return 4;
+#elif defined(HAVE_LIBNX) || defined(SWITCH)
+   return 4;
+#elif defined(_3DS)
+   u8 device_model = 0xFF;
+   CFGU_GetSystemModel(&device_model);/*(0 = O3DS, 1 = O3DSXL, 2 = N3DS, 3 = 2DS, 4 = N3DSXL, 5 = N2DSXL)*/
+   switch (device_model)
+   {
+		case 0:
+		case 1:
+		case 3:
+			/*Old 3/2DS*/
+			return 2;
+
+		case 2:
+		case 4:
+		case 5:
+			/*New 3/2DS*/
+			return 4;
+
+		default:
+			/*Unknown Device Or Check Failed*/
+			break;
+   }
+   return 1;
+#elif defined(WIIU)
+   return 3;
+#elif defined(_SC_NPROCESSORS_ONLN)
+   /* Linux, most UNIX-likes. */
+   long ret = sysconf(_SC_NPROCESSORS_ONLN);
+   if (ret <= 0)
+      return (unsigned)1;
+   return (unsigned)ret;
+#elif defined(BSD) || defined(__APPLE__)
+   /* BSD */
+   /* Copypasta from stackoverflow, dunno if it works. */
+   int num_cpu = 0;
+   int mib[4];
+   size_t len = sizeof(num_cpu);
+
+   mib[0] = CTL_HW;
+   mib[1] = HW_AVAILCPU;
+   sysctl(mib, 2, &num_cpu, &len, NULL, 0);
+   if (num_cpu < 1)
+   {
+      mib[1] = HW_NCPU;
+      sysctl(mib, 2, &num_cpu, &len, NULL, 0);
+      if (num_cpu < 1)
+         num_cpu = 1;
+   }
+   return num_cpu;
+#elif defined(__linux__)
+   CpuList  cpus_present[1];
+   CpuList  cpus_possible[1];
+   int amount = 0;
+
+   cpulist_read_from(cpus_present, "/sys/devices/system/cpu/present");
+   cpulist_read_from(cpus_possible, "/sys/devices/system/cpu/possible");
+
+   /* Compute the intersection of both sets to get the actual number of
+    * CPU cores that can be used on this device by the kernel.
+    */
+   cpus_present->mask &= cpus_possible->mask;
+   amount              = __builtin_popcount(cpus_present->mask);
+
+   if (amount == 0)
+      return 1;
+   return amount;
+#elif defined(_XBOX360)
+   return 3;
+#else
+   /* No idea, assume single core. */
+   return 1;
+#endif
+}
+
+/* According to http://en.wikipedia.org/wiki/CPUID */
+#define VENDOR_INTEL_b  0x756e6547
+#define VENDOR_INTEL_c  0x6c65746e
+#define VENDOR_INTEL_d  0x49656e69
+
+/**
+ * cpu_features_get:
+ *
+ * Gets CPU features..
+ *
+ * Returns: bitmask of all CPU features available.
+ **/
+uint64_t cpu_features_get(void)
+{
+   uint64_t cpu        = 0;
+#if defined(CPU_X86) && !defined(__MACH__)
+   int vendor_is_intel = 0;
+   const int avx_flags = (1 << 27) | (1 << 28);
+#endif
+#if defined(__MACH__)
+   size_t len          = sizeof(size_t);
+
+   if (sysctlbyname("hw.optional.floatingpoint", NULL, &len, NULL, 0) == 0)
+   {
+      cpu |= RETRO_SIMD_CMOV;
+   }
+
+#if defined(CPU_X86)
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.mmx", NULL, &len, NULL, 0) == 0)
+   {
+      cpu |= RETRO_SIMD_MMX;
+      cpu |= RETRO_SIMD_MMXEXT;
+   }
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.sse", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_SSE;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.sse2", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_SSE2;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.sse3", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_SSE3;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.supplementalsse3", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_SSSE3;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.sse4_1", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_SSE4;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.sse4_2", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_SSE42;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.aes", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_AES;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.avx1_0", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_AVX;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.avx2_0", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_AVX2;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.altivec", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_VMX;
+
+#else
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.neon", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_NEON;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.neon_fp16", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_VFPV3;
+
+   len            = sizeof(size_t);
+   if (sysctlbyname("hw.optional.neon_hpfp", NULL, &len, NULL, 0) == 0)
+      cpu |= RETRO_SIMD_VFPV4;
+#endif
+#elif defined(_XBOX1)
+   cpu |= RETRO_SIMD_MMX;
+   cpu |= RETRO_SIMD_SSE;
+   cpu |= RETRO_SIMD_MMXEXT;
+#elif defined(CPU_X86)
+   unsigned max_flag   = 0;
+   int flags[4];
+   int vendor_shuffle[3];
+   char vendor[13];
+   uint64_t cpu_flags  = 0;
+   x86_cpuid(0, flags);
+   vendor_shuffle[0] = flags[1];
+   vendor_shuffle[1] = flags[3];
+   vendor_shuffle[2] = flags[2];
+
+   vendor[0]         = '\0';
+   memcpy(vendor, vendor_shuffle, sizeof(vendor_shuffle));
+
+   /* printf("[CPUID]: Vendor: %s\n", vendor); */
+
+   vendor_is_intel = (
+         flags[1] == VENDOR_INTEL_b &&
+         flags[2] == VENDOR_INTEL_c &&
+         flags[3] == VENDOR_INTEL_d);
+
+   max_flag = flags[0];
+   if (max_flag < 1) /* Does CPUID not support func = 1? (unlikely ...) */
+      return 0;
+
+   x86_cpuid(1, flags);
+
+   if (flags[3] & (1 << 15))
+      cpu |= RETRO_SIMD_CMOV;
+
+   if (flags[3] & (1 << 23))
+      cpu |= RETRO_SIMD_MMX;
+
+   if (flags[3] & (1 << 25))
+   {
+      /* SSE also implies MMXEXT (according to FFmpeg source). */
+      cpu |= RETRO_SIMD_SSE;
+      cpu |= RETRO_SIMD_MMXEXT;
+   }
+
+   if (flags[3] & (1 << 26))
+      cpu |= RETRO_SIMD_SSE2;
+
+   if (flags[2] & (1 << 0))
+      cpu |= RETRO_SIMD_SSE3;
+
+   if (flags[2] & (1 << 9))
+      cpu |= RETRO_SIMD_SSSE3;
+
+   if (flags[2] & (1 << 19))
+      cpu |= RETRO_SIMD_SSE4;
+
+   if (flags[2] & (1 << 20))
+      cpu |= RETRO_SIMD_SSE42;
+
+   if ((flags[2] & (1 << 23)))
+      cpu |= RETRO_SIMD_POPCNT;
+
+   if (vendor_is_intel && (flags[2] & (1 << 22)))
+      cpu |= RETRO_SIMD_MOVBE;
+
+   if (flags[2] & (1 << 25))
+      cpu |= RETRO_SIMD_AES;
+
+   /* Must only perform xgetbv check if we have
+    * AVX CPU support (guaranteed to have at least i686). */
+   if (((flags[2] & avx_flags) == avx_flags)
+         && ((xgetbv_x86(0) & 0x6) == 0x6))
+      cpu |= RETRO_SIMD_AVX;
+
+   if (max_flag >= 7)
+   {
+      x86_cpuid(7, flags);
+      if (flags[1] & (1 << 5))
+         cpu |= RETRO_SIMD_AVX2;
+   }
+
+   x86_cpuid(0x80000000, flags);
+   max_flag = flags[0];
+   if (max_flag >= 0x80000001u)
+   {
+      x86_cpuid(0x80000001, flags);
+      if (flags[3] & (1 << 23))
+         cpu |= RETRO_SIMD_MMX;
+      if (flags[3] & (1 << 22))
+         cpu |= RETRO_SIMD_MMXEXT;
+   }
+#elif defined(__linux__)
+   if (check_arm_cpu_feature("neon"))
+   {
+      cpu |= RETRO_SIMD_NEON;
+#if defined(__ARM_NEON__) && defined(__arm__)
+      arm_enable_runfast_mode();
+#endif
+   }
+
+   if (check_arm_cpu_feature("vfpv3"))
+      cpu |= RETRO_SIMD_VFPV3;
+
+   if (check_arm_cpu_feature("vfpv4"))
+      cpu |= RETRO_SIMD_VFPV4;
+
+   if (check_arm_cpu_feature("asimd"))
+   {
+      cpu |= RETRO_SIMD_ASIMD;
+#ifdef __ARM_NEON__
+      cpu |= RETRO_SIMD_NEON;
+#if defined(__arm__)
+      arm_enable_runfast_mode();
+#endif
+#endif
+   }
+
+#if 0
+    check_arm_cpu_feature("swp");
+    check_arm_cpu_feature("half");
+    check_arm_cpu_feature("thumb");
+    check_arm_cpu_feature("fastmult");
+    check_arm_cpu_feature("vfp");
+    check_arm_cpu_feature("edsp");
+    check_arm_cpu_feature("thumbee");
+    check_arm_cpu_feature("tls");
+    check_arm_cpu_feature("idiva");
+    check_arm_cpu_feature("idivt");
+#endif
+
+#elif defined(__ARM_NEON__)
+   cpu |= RETRO_SIMD_NEON;
+#if defined(__arm__)
+   arm_enable_runfast_mode();
+#endif
+#elif defined(__ALTIVEC__)
+   cpu |= RETRO_SIMD_VMX;
+#elif defined(XBOX360)
+   cpu |= RETRO_SIMD_VMX128;
+#elif defined(PSP) || defined(PS2)
+   cpu |= RETRO_SIMD_VFPU;
+#elif defined(GEKKO)
+   cpu |= RETRO_SIMD_PS;
+#endif
+
+   return cpu;
+}
+
+void cpu_features_get_model_name(char *name, int len)
+{
+#if defined(CPU_X86) && !defined(__MACH__)
+   union {
+      int i[4];
+      unsigned char s[16];
+   } flags;
+   int i, j;
+   size_t pos = 0;
+   bool start = false;
+
+   if (!name)
+      return;
+
+   x86_cpuid(0x80000000, flags.i);
+
+   if (flags.i[0] < 0x80000004)
+      return;
+
+   for (i = 0; i < 3; i++)
+   {
+      memset(flags.i, 0, sizeof(flags.i));
+      x86_cpuid(0x80000002 + i, flags.i);
+
+      for (j = 0; j < sizeof(flags.s); j++)
+      {
+         if (!start && flags.s[j] == ' ')
+            continue;
+         else
+            start = true;
+
+         if (pos == len - 1)
+         {
+            /* truncate if we ran out of room */
+            name[pos] = '\0';
+            goto end;
+         }
+
+         name[pos++] = flags.s[j];
+      }
+   }
+end:
+   /* terminate our string */
+   if (pos < (size_t)len)
+      name[pos] = '\0';
+#elif defined(__MACH__)
+   if (!name)
+      return;
+   {
+      size_t len_size = len;
+      sysctlbyname("machdep.cpu.brand_string", name, &len_size, NULL, 0);
+   }
+#else
+   if (!name)
+      return;
+   return;
+#endif
+}
diff --git a/ThirdParty/RetroArch/libretro-common/file/config_file.c b/ThirdParty/RetroArch/libretro-common/file/config_file.c
new file mode 100644
index 000000000..8660cfa81
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/file/config_file.c
@@ -0,0 +1,1505 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (config_file.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+
+#ifdef ORBIS
+#include <sys/fcntl.h>
+#include <orbisFile.h>
+#endif
+#include <retro_miscellaneous.h>
+#include <compat/strl.h>
+#include <compat/posix_string.h>
+#include <compat/fopen_utf8.h>
+#include <compat/msvc.h>
+#include <file/config_file.h>
+#include <file/file_path.h>
+#include <string/stdstring.h>
+#include <streams/file_stream.h>
+#include <array/rhmap.h>
+
+#define MAX_INCLUDE_DEPTH 16
+
+struct config_include_list
+{
+   char *path;
+   struct config_include_list *next;
+};
+
+/* Forward declaration */
+static bool config_file_parse_line(config_file_t *conf,
+      struct config_entry_list *list, char *line, config_file_cb_t *cb);
+
+static int config_file_sort_compare_func(struct config_entry_list *a,
+      struct config_entry_list *b)
+{
+   if (a && b)
+   {
+      if (a->key)
+      {
+         if (b->key)
+            return strcasecmp(a->key, b->key);
+         return 1;
+      }
+      else if (b->key)
+         return -1;
+   }
+
+   return 0;
+}
+
+/* https://stackoverflow.com/questions/7685/merge-sort-a-linked-list */
+static struct config_entry_list* config_file_merge_sort_linked_list(
+         struct config_entry_list *list, int (*compare)(
+         struct config_entry_list *one,struct config_entry_list *two))
+{
+   struct config_entry_list
+         *right  = list,
+         *temp   = list,
+         *last   = list,
+         *result = 0,
+         *next   = 0,
+         *tail   = 0;
+
+   /* Trivial case. */
+   if (!list || !list->next)
+      return list;
+
+   /* Find halfway through the list (by running two pointers,
+    * one at twice the speed of the other). */
+   while (temp && temp->next)
+   {
+      last     = right;
+      right    = right->next;
+      temp     = temp->next->next;
+   }
+
+   /* Break the list in two. (prev pointers are broken here,
+    * but we fix later) */
+   last->next  = 0;
+
+   /* Recurse on the two smaller lists: */
+   list        = config_file_merge_sort_linked_list(list, compare);
+   right       = config_file_merge_sort_linked_list(right, compare);
+
+   /* Merge: */
+   while (list || right)
+   {
+      /* Take from empty lists, or compare: */
+      if (!right)
+      {
+         next  = list;
+         list  = list->next;
+      }
+      else if (!list)
+      {
+         next  = right;
+         right = right->next;
+      }
+      else if (compare(list, right) < 0)
+      {
+         next  = list;
+         list  = list->next;
+      }
+      else
+      {
+         next  = right;
+         right = right->next;
+      }
+
+      if (!result)
+         result     = next;
+      else
+         tail->next = next;
+
+      tail          = next;
+   }
+
+   return result;
+}
+
+/* Searches input string for a comment ('#') entry
+ * > If first character is '#', then entire line is
+ *   a comment and may correspond to a directive
+ *   (command action - e.g. include sub-config file).
+ *   In this case, 'str' is set to NUL and the comment
+ *   itself (everything after the '#' character) is
+ *   returned
+ * > If a '#' character is found inside a string literal
+ *   value, then it does not correspond to a comment and
+ *   is ignored. In this case, 'str' is left untouched
+ *   and NULL is returned
+ * > If a '#' character is found anywhere else, then the
+ *   comment text is a suffix of the input string and
+ *   has no programmatic value. In this case, the comment
+ *   is removed from the end of 'str' and NULL is returned */
+static char *config_file_strip_comment(char *str)
+{
+   /* Search for a comment (#) character */
+   char *comment = strchr(str, '#');
+
+   if (comment)
+   {
+      char *literal_start = NULL;
+
+      /* Check whether entire line is a comment
+       * > First character == '#' */
+      if (str == comment)
+      {
+         /* Set 'str' to NUL and return comment
+          * for processing at a higher level */
+         *str = '\0';
+         return ++comment;
+      }
+
+      /* Comment character occurs at an offset:
+       * Search for the start of a string literal value */
+      literal_start = strchr(str, '\"');
+
+      /* Check whether string literal start occurs
+       * *before* the comment character */
+      if (literal_start && (literal_start < comment))
+      {
+         /* Search for the end of the string literal
+          * value */
+         char *literal_end = strchr(literal_start + 1, '\"');
+
+         /* Check whether string literal end occurs
+          * *after* the comment character
+          * > If this is the case, ignore the comment
+          * > Leave 'str' untouched and return NULL */
+         if (literal_end && (literal_end > comment))
+            return NULL;
+      }
+
+      /* If we reach this point, then a comment
+       * exists outside of a string literal
+       * > Trim the entire comment from the end
+       *   of 'str' */
+      *comment = '\0';
+   }
+
+   return NULL;
+}
+
+static char *config_file_extract_value(char *line, bool is_value)
+{
+   size_t idx  = 0;
+   char *value = NULL;
+
+   if (is_value)
+   {
+      while (ISSPACE((int)*line))
+         line++;
+
+      /* If we don't have an equal sign here,
+       * we've got an invalid string. */
+      if (*line != '=')
+         return NULL;
+
+      line++;
+   }
+
+   while (ISSPACE((int)*line))
+      line++;
+
+   /* Note: From this point on, an empty value
+    * string is valid - and in this case, strdup("")
+    * will be returned
+    * > If we instead return NULL, the the entry
+    *   is ignored completely - which means we cannot
+    *   track *changes* in entry value */
+
+   /* If first character is ("), we have a full string
+    * literal */
+   if (*line == '"')
+   {
+      /* Skip to next character */
+      line++;
+
+      /* If this a ("), then value string is empty */
+      if (*line == '"')
+         return strdup("");
+
+      /* Find the next (") character */
+      while (line[idx] && (line[idx] != '\"'))
+         idx++;
+
+      line[idx] = '\0';
+      value     = line;
+   }
+   /* This is not a string literal - just read
+    * until the next space is found
+    * > Note: Skip this if line is empty */
+   else if (*line != '\0')
+   {
+      /* Find next space character */
+      while (line[idx] && isgraph((int)line[idx]))
+         idx++;
+
+      line[idx] = '\0';
+      value     = line;
+   }
+
+   if (value && *value)
+      return strdup(value);
+
+   return strdup("");
+}
+
+/* Move semantics? */
+static void config_file_add_child_list(config_file_t *parent, config_file_t *child)
+{
+   struct config_entry_list *list = child->entries;
+   bool merge_hash_map            = false;
+
+   if (parent->entries)
+   {
+      struct config_entry_list *head = parent->entries;
+      while (head->next)
+         head = head->next;
+
+      /* set list readonly */
+      while (list)
+      {
+         list->readonly = true;
+         list           = list->next;
+      }
+      head->next        = child->entries;
+
+      merge_hash_map    = true;
+   }
+   else
+   {
+      /* set list readonly */
+      while (list)
+      {
+         list->readonly = true;
+         list           = list->next;
+      }
+      parent->entries   = child->entries;
+   }
+
+   /* Rebase tail. */
+   if (parent->entries)
+   {
+      struct config_entry_list *head =
+         (struct config_entry_list*)parent->entries;
+
+      while (head->next)
+         head = head->next;
+      parent->tail = head;
+   }
+   else
+      parent->tail = NULL;
+
+   /* Update hash map */
+   if (merge_hash_map)
+   {
+      size_t i;
+      size_t cap;
+
+      /* We are merging two lists - if any child entry
+       * (key) is not present in the parent list, add it
+       * to the parent hash map */
+      for (i = 0, cap = RHMAP_CAP(child->entries_map); i != cap; i++)
+      {
+         uint32_t child_hash   = RHMAP_KEY(child->entries_map, i);
+         const char *child_key = RHMAP_KEY_STR(child->entries_map, i);
+
+         if (child_hash &&
+             child_key &&
+             !RHMAP_HAS_FULL(parent->entries_map, child_hash, child_key))
+         {
+            struct config_entry_list *entry = child->entries_map[i];
+
+            if (entry)
+               RHMAP_SET_FULL(parent->entries_map, child_hash, child_key, entry);
+         }
+      }
+
+      /* Child entries map is no longer required,
+       * so free it now */
+      RHMAP_FREE(child->entries_map);
+   }
+   else
+   {
+      /* If parent list was originally empty,
+       * take map from child list */
+      RHMAP_FREE(parent->entries_map);
+      parent->entries_map = child->entries_map;
+      child->entries_map  = NULL;
+   }
+
+   child->entries = NULL;
+}
+
+static void config_file_get_realpath(char *s, size_t len,
+      char *path, const char *config_path)
+{
+#ifdef _WIN32
+   if (!string_is_empty(config_path))
+      fill_pathname_resolve_relative(s, config_path,
+            path, len);
+#else
+#if !defined(__PSL1GHT__) && !defined(__PS3__)
+   if (*path == '~')
+   {
+      const char *home = getenv("HOME");
+      if (home)
+      {
+         strlcpy(s, home,     len);
+         strlcat(s, path + 1, len);
+      }
+      else
+         strlcpy(s, path + 1, len);
+   }
+   else
+#endif
+      if (!string_is_empty(config_path))
+         fill_pathname_resolve_relative(s, config_path, path, len);
+#endif
+}
+
+static void config_file_add_sub_conf(config_file_t *conf, char *path,
+      char *real_path, size_t len, config_file_cb_t *cb)
+{
+   struct config_include_list *head = conf->includes;
+   struct config_include_list *node = (struct config_include_list*)
+      malloc(sizeof(*node));
+
+   if (node)
+   {
+      node->next        = NULL;
+      /* Add include list */
+      node->path        = strdup(path);
+
+      if (head)
+      {
+         while (head->next)
+            head        = head->next;
+
+         head->next     = node;
+      }
+      else
+         conf->includes = node;
+   }
+
+   config_file_get_realpath(real_path, len, path,
+         conf->path);
+}
+
+static int config_file_load_internal(
+      struct config_file *conf,
+      const char *path, unsigned depth, config_file_cb_t *cb)
+{
+   RFILE         *file = NULL;
+   char      *new_path = strdup(path);
+   if (!new_path)
+      return 1;
+
+   conf->path          = new_path;
+   conf->include_depth = depth;
+   file                = filestream_open(path,
+         RETRO_VFS_FILE_ACCESS_READ,
+         RETRO_VFS_FILE_ACCESS_HINT_NONE);
+
+   if (!file)
+   {
+      free(conf->path);
+      return 1;
+   }
+
+   while (!filestream_eof(file))
+   {
+      char *line                     = NULL;
+      struct config_entry_list *list = (struct config_entry_list*)
+         malloc(sizeof(*list));
+
+      if (!list)
+      {
+         filestream_close(file);
+         return -1;
+      }
+
+      list->readonly  = false;
+      list->key       = NULL;
+      list->value     = NULL;
+      list->next      = NULL;
+
+      line            = filestream_getline(file);
+
+      if (!line)
+      {
+         free(list);
+         continue;
+      }
+
+      if ( 
+              !string_is_empty(line) 
+            && config_file_parse_line(conf, list, line, cb))
+      {
+         if (conf->entries)
+            conf->tail->next = list;
+         else
+            conf->entries    = list;
+
+         conf->tail = list;
+
+         if (list->key)
+         {
+            /* Only add entry to the map if an entry
+             * with the specified value does not
+             * already exist */
+            uint32_t hash = rhmap_hash_string(list->key);
+
+            if (!RHMAP_HAS_FULL(conf->entries_map, hash, list->key))
+            {
+               RHMAP_SET_FULL(conf->entries_map, hash, list->key, list);
+
+               if (cb && list->value)
+                  cb->config_file_new_entry_cb(list->key, list->value);
+            }
+         }
+      }
+
+      free(line);
+
+      if (list != conf->tail)
+         free(list);
+   }
+
+   filestream_close(file);
+
+   return 0;
+}
+
+static bool config_file_parse_line(config_file_t *conf,
+      struct config_entry_list *list, char *line, config_file_cb_t *cb)
+{
+   size_t cur_size       = 32;
+   size_t idx            = 0;
+   char *key             = NULL;
+   char *key_tmp         = NULL;
+   /* Remove any comment text */
+   char *comment         = config_file_strip_comment(line);
+
+   /* Check whether entire line is a comment */
+   if (comment)
+   {
+      config_file_t sub_conf;
+      bool include_found       = false;
+      bool reference_found     = false;
+      char real_path[PATH_MAX_LENGTH];
+      char *path               = NULL;
+      char *include_line       = NULL;
+      char *reference_line     = NULL;
+
+      include_found = string_starts_with_size(comment, "include ",
+                                          STRLEN_CONST("include "));
+      reference_found = string_starts_with_size(comment, "reference ",
+                                          STRLEN_CONST("reference "));
+
+      /* All comments except those starting with the include or 
+       * reference directive are ignored */
+      if (!include_found && !reference_found)
+         return false;
+
+      /* Starting a line with an 'include' directive
+       * appends a sub-config file */
+      if (include_found)
+      {
+         include_line = comment + STRLEN_CONST("include ");
+
+         if (string_is_empty(include_line))
+            return false;
+
+         path = config_file_extract_value(include_line, false);
+
+         if (!path)
+            return false;
+
+         if (     string_is_empty(path)
+               || conf->include_depth >= MAX_INCLUDE_DEPTH)
+         {
+            free(path);
+            return false;
+         }
+
+         real_path[0]         = '\0';
+         config_file_add_sub_conf(conf, path,
+            real_path, sizeof(real_path), cb);
+
+         config_file_initialize(&sub_conf);
+
+         switch (config_file_load_internal(&sub_conf, real_path,
+            conf->include_depth + 1, cb))
+         {
+            case 0:
+               /* Pilfer internal list. */
+               config_file_add_child_list(conf, &sub_conf);
+               /* fall-through to deinitialize */
+            case -1:
+               config_file_deinitialize(&sub_conf);
+               break;
+            case 1:
+            default:
+               break;
+         }
+      }
+
+      /* Starting a line with an 'reference' directive
+       * sets the reference path */
+      if (reference_found)
+      {
+         reference_line = comment + STRLEN_CONST("reference ");
+
+         if (string_is_empty(reference_line))
+            return false;
+
+         path = config_file_extract_value(reference_line, false);
+
+         if (!path)
+            return false;
+
+         config_file_set_reference_path(conf, path);
+
+         if (!path)
+            return false;
+      }
+
+      free(path);
+      return true;
+   }
+
+   /* Skip to first non-space character */
+   while (ISSPACE((int)*line))
+      line++;
+
+   /* Allocate storage for key */
+   key = (char*)malloc(cur_size + 1);
+   if (!key)
+      return false;
+
+   /* Copy line contents into key until we
+    * reach the next space character */
+   while (isgraph((int)*line))
+   {
+      /* If current key storage is too small,
+       * double its size */
+      if (idx == cur_size)
+      {
+         cur_size *= 2;
+         key_tmp   = (char*)realloc(key, cur_size + 1);
+
+         if (!key_tmp)
+         {
+            free(key);
+            return false;
+         }
+
+         key = key_tmp;
+      }
+
+      key[idx++] = *line++;
+   }
+   key[idx]      = '\0';
+
+   /* Add key and value entries to list */
+   list->key     = key;
+   list->value   = config_file_extract_value(line, true);
+
+   /* An entry without a value is invalid */
+   if (!list->value)
+   {
+      list->key = NULL;
+      free(key);
+      return false;
+   }
+
+   return true;
+}
+
+static int config_file_from_string_internal(
+      struct config_file *conf,
+      char *from_string,
+      const char *path)
+{
+   char *lines                    = from_string;
+   char *save_ptr                 = NULL;
+   char *line                     = NULL;
+
+   if (!string_is_empty(path))
+      conf->path                  = strdup(path);
+   if (string_is_empty(lines))
+      return 0;
+
+   /* Get first line of config file */
+   line = strtok_r(lines, "\n", &save_ptr);
+
+   while (line)
+   {
+      struct config_entry_list *list = (struct config_entry_list*)
+            malloc(sizeof(*list));
+
+      if (!list)
+         return -1;
+
+      list->readonly  = false;
+      list->key       = NULL;
+      list->value     = NULL;
+      list->next      = NULL;
+
+      /* Parse current line */
+      if (
+              !string_is_empty(line)
+            && config_file_parse_line(conf, list, line, NULL))
+      {
+         if (conf->entries)
+            conf->tail->next = list;
+         else
+            conf->entries    = list;
+
+         conf->tail          = list;
+
+         if (list->key)
+         {
+            /* Only add entry to the map if an entry
+             * with the specified value does not
+             * already exist */
+            uint32_t hash = rhmap_hash_string(list->key);
+            if (!RHMAP_HAS_FULL(conf->entries_map, hash, list->key))
+               RHMAP_SET_FULL(conf->entries_map, hash, list->key, list);
+         }
+      }
+
+      if (list != conf->tail)
+         free(list);
+
+      /* Get next line of config file */
+      line = strtok_r(NULL, "\n", &save_ptr);
+   }
+   
+   return 0;
+}
+
+void config_file_set_reference_path(config_file_t *conf, char *path)
+{
+   /* It is expected that the conf has it's path already set */
+   
+   char short_path[PATH_MAX_LENGTH];
+   
+   short_path[0] = '\0';
+
+   if (!conf)
+      return;
+
+   if (conf->reference)
+   {
+      free(conf->reference);
+      conf->reference = NULL;
+   }
+
+   fill_pathname_abbreviated_or_relative(short_path, conf->path, path, sizeof(short_path));
+   
+   conf->reference = strdup(short_path);
+}
+
+bool config_file_deinitialize(config_file_t *conf)
+{
+   struct config_include_list *inc_tmp = NULL;
+   struct config_entry_list *tmp       = NULL;
+   if (!conf)
+      return false;
+
+   tmp = conf->entries;
+   while (tmp)
+   {
+      struct config_entry_list *hold = NULL;
+      if (tmp->key)
+         free(tmp->key);
+      if (tmp->value)
+         free(tmp->value);
+
+      tmp->value = NULL;
+      tmp->key   = NULL;
+
+      hold       = tmp;
+      tmp        = tmp->next;
+
+      if (hold)
+         free(hold);
+   }
+
+   inc_tmp = (struct config_include_list*)conf->includes;
+   while (inc_tmp)
+   {
+      struct config_include_list *hold = NULL;
+      if (inc_tmp->path)
+         free(inc_tmp->path);
+      hold    = (struct config_include_list*)inc_tmp;
+      inc_tmp = inc_tmp->next;
+      if (hold)
+         free(hold);
+   }
+
+   if (conf->reference)
+      free(conf->reference);
+
+   if (conf->path)
+      free(conf->path);
+
+   RHMAP_FREE(conf->entries_map);
+
+   return true;
+}
+
+void config_file_free(config_file_t *conf)
+{
+   if (!config_file_deinitialize(conf))
+      return;
+   free(conf);
+}
+
+bool config_append_file(config_file_t *conf, const char *path)
+{
+   config_file_t *new_conf = config_file_new_from_path_to_string(path);
+   size_t i;
+   size_t cap;
+
+   if (!new_conf)
+      return false;
+
+   /* Update hash map */
+   for (i = 0, cap = RHMAP_CAP(new_conf->entries_map); i != cap; i++)
+   {
+      uint32_t new_hash   = RHMAP_KEY(new_conf->entries_map, i);
+      const char *new_key = RHMAP_KEY_STR(new_conf->entries_map, i);
+
+      if (new_hash && new_key)
+      {
+         struct config_entry_list *entry = new_conf->entries_map[i];
+
+         if (entry)
+            RHMAP_SET_FULL(conf->entries_map, new_hash, new_key, entry);
+      }
+   }
+
+   if (new_conf->tail)
+   {
+      new_conf->tail->next = conf->entries;
+      conf->entries        = new_conf->entries; /* Pilfer. */
+      new_conf->entries    = NULL;
+   }
+
+   config_file_free(new_conf);
+   return true;
+}
+
+config_file_t *config_file_new_from_string(char *from_string,
+      const char *path)
+{
+   struct config_file *conf      = config_file_new_alloc();
+
+   if (!conf)
+      return NULL;
+   if (config_file_from_string_internal(conf, from_string, path) == -1)
+   {
+      config_file_free(conf);
+      return NULL;
+   }
+   return conf;
+}
+
+config_file_t *config_file_new_from_path_to_string(const char *path)
+{
+   int64_t length                = 0;
+   uint8_t *ret_buf              = NULL;
+   config_file_t *conf           = NULL;
+
+   if (path_is_valid(path))
+   {
+      if (filestream_read_file(path, (void**)&ret_buf, &length))
+      {
+         /* Note: 'ret_buf' is not used outside this
+          * function - we do not care that it will be
+          * modified by config_file_new_from_string() */
+         if (length >= 0)
+            conf = config_file_new_from_string((char*)ret_buf, path);
+
+         if ((void*)ret_buf)
+            free((void*)ret_buf);
+      }
+   }
+
+   return conf;
+}
+
+config_file_t *config_file_new_with_callback(
+      const char *path, config_file_cb_t *cb)
+{
+   int ret                  = 0;
+   struct config_file *conf = config_file_new_alloc();
+   if (!path || !*path)
+      return conf;
+   ret = config_file_load_internal(conf, path, 0, cb);
+   if (ret == -1)
+   {
+      config_file_free(conf);
+      return NULL;
+   }
+   else if (ret == 1)
+   {
+      free(conf);
+      return NULL;
+   }
+   return conf;
+}
+
+config_file_t *config_file_new(const char *path)
+{
+   int ret                  = 0;
+   struct config_file *conf = config_file_new_alloc();
+   if (!path || !*path)
+      return conf;
+   ret = config_file_load_internal(conf, path, 0, NULL);
+   if (ret == -1)
+   {
+      config_file_free(conf);
+      return NULL;
+   }
+   else if (ret == 1)
+   {
+      free(conf);
+      return NULL;
+   }
+   return conf;
+}
+
+void config_file_initialize(struct config_file *conf)
+{
+   if (!conf)
+      return;
+
+   conf->path                     = NULL;
+   conf->entries_map              = NULL;
+   conf->entries                  = NULL;
+   conf->tail                     = NULL;
+   conf->last                     = NULL;
+   conf->reference                = NULL;
+   conf->includes                 = NULL;
+   conf->include_depth            = 0;
+   conf->guaranteed_no_duplicates = false;
+   conf->modified                 = false;
+}
+
+config_file_t *config_file_new_alloc(void)
+{
+   struct config_file *conf = (struct config_file*)malloc(sizeof(*conf));
+   if (!conf)
+      return NULL;
+   config_file_initialize(conf);
+   return conf;
+}
+
+static struct config_entry_list *config_get_entry_internal(
+      const config_file_t *conf,
+      const char *key, struct config_entry_list **prev)
+{
+   struct config_entry_list *entry    = NULL;
+   struct config_entry_list *previous = prev ? *prev : NULL;
+
+   entry = RHMAP_GET_STR(conf->entries_map, key);
+
+   if (entry)
+      return entry;
+
+   if (prev)
+   {
+      for (entry = conf->entries; entry; entry = entry->next)
+         previous = entry;
+
+      *prev = previous;
+   }
+
+   return NULL;
+}
+
+struct config_entry_list *config_get_entry(
+      const config_file_t *conf, const char *key)
+{
+   return RHMAP_GET_STR(conf->entries_map, key);
+}
+
+bool config_get_double(config_file_t *conf, const char *key, double *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+
+   if (!entry)
+      return false;
+
+   *in = strtod(entry->value, NULL);
+   return true;
+}
+
+bool config_get_float(config_file_t *conf, const char *key, float *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+
+   if (!entry)
+      return false;
+
+   /* strtof() is C99/POSIX. Just use the more portable kind. */
+   *in = (float)strtod(entry->value, NULL);
+   return true;
+}
+
+bool config_get_int(config_file_t *conf, const char *key, int *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+   errno = 0;
+
+   if (entry)
+   {
+      int val = (int)strtol(entry->value, NULL, 0);
+
+      if (errno == 0)
+      {
+         *in = val;
+         return true;
+      }
+   }
+
+   return false;
+}
+
+bool config_get_size_t(config_file_t *conf, const char *key, size_t *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+   errno = 0;
+
+   if (entry)
+   {
+      size_t val = 0;
+      if (sscanf(entry->value, "%" PRI_SIZET, &val) == 1)
+      {
+         *in = val;
+         return true;
+      }
+   }
+
+   return false;
+}
+
+#if defined(__STDC_VERSION__) && __STDC_VERSION__>=199901L
+bool config_get_uint64(config_file_t *conf, const char *key, uint64_t *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+   errno = 0;
+
+   if (entry)
+   {
+      uint64_t val = strtoull(entry->value, NULL, 0);
+
+      if (errno == 0)
+      {
+         *in = val;
+         return true;
+      }
+   }
+   return false;
+}
+#endif
+
+bool config_get_uint(config_file_t *conf, const char *key, unsigned *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+   errno = 0;
+
+   if (entry)
+   {
+      unsigned val = (unsigned)strtoul(entry->value, NULL, 0);
+
+      if (errno == 0)
+      {
+         *in = val;
+         return true;
+      }
+   }
+
+   return false;
+}
+
+bool config_get_hex(config_file_t *conf, const char *key, unsigned *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+   errno = 0;
+
+   if (entry)
+   {
+      unsigned val = (unsigned)strtoul(entry->value, NULL, 16);
+
+      if (errno == 0)
+      {
+         *in = val;
+         return true;
+      }
+   }
+
+   return false;
+}
+
+bool config_get_char(config_file_t *conf, const char *key, char *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+
+   if (entry)
+   {
+      if (entry->value[0] && entry->value[1])
+         return false;
+
+      *in = *entry->value;
+      return true;
+   }
+
+   return false;
+}
+
+bool config_get_string(config_file_t *conf, const char *key, char **str)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+
+   if (!entry || !entry->value)
+      return false;
+
+   *str = strdup(entry->value);
+   return true;
+}
+
+bool config_get_config_path(config_file_t *conf, char *s, size_t len)
+{
+   if (!conf)
+      return false;
+   return strlcpy(s, conf->path, len);
+}
+
+bool config_get_array(config_file_t *conf, const char *key,
+      char *buf, size_t size)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+   if (entry)
+      return strlcpy(buf, entry->value, size) < size;
+   return false;
+}
+
+bool config_get_path(config_file_t *conf, const char *key,
+      char *buf, size_t size)
+{
+#if defined(RARCH_CONSOLE) || !defined(RARCH_INTERNAL)
+   if (config_get_array(conf, key, buf, size))
+      return true;
+#else
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+
+   if (entry)
+   {
+      fill_pathname_expand_special(buf, entry->value, size);
+      return true;
+   }
+#endif
+   return false;
+}
+
+bool config_get_bool(config_file_t *conf, const char *key, bool *in)
+{
+   const struct config_entry_list *entry = config_get_entry(conf, key);
+
+   if (!entry)
+      return false;
+
+   if      (
+         (
+            entry->value[0] == '1'
+         && entry->value[1] == '\0'
+         )
+         || string_is_equal(entry->value, "true")
+         )
+      *in = true;
+   else if (
+         (
+            entry->value[0] == '0'
+         && entry->value[1] == '\0'
+         )
+         || string_is_equal(entry->value, "false")
+         )
+      *in = false;
+   else
+      return false;
+
+   return true;
+}
+
+void config_set_string(config_file_t *conf, const char *key, const char *val)
+{
+   struct config_entry_list *last  = NULL;
+   struct config_entry_list *entry = NULL;
+
+   if (!conf || !key || !val)
+      return;
+
+   last                            = conf->entries;
+
+   if (conf->guaranteed_no_duplicates)
+   {
+      if (conf->last)
+         last                      = conf->last;
+   }
+   else
+   {
+      entry                        = config_get_entry_internal(
+            conf, key, &last);
+      if (entry)
+      {
+         /* An entry corresponding to 'key' already exists
+          * > Check whether value is currently set */
+         if (entry->value)
+         {
+            /* Do nothing if value is unchanged */
+            if (string_is_equal(entry->value, val))
+               return;
+
+            /* Value is to be updated
+             * > Free existing */
+            free(entry->value);
+         }
+
+         /* Update value
+          * > Note that once a value is set, it
+          *   is no longer considered 'read only' */
+         entry->value    = strdup(val);
+         entry->readonly = false;
+         conf->modified  = true;
+         return;
+      }
+   }
+
+   /* Entry corresponding to 'key' does not exist
+    * > Create new entry */
+   entry = (struct config_entry_list*)malloc(sizeof(*entry));
+   if (!entry)
+      return;
+
+   entry->readonly  = false;
+   entry->key       = strdup(key);
+   entry->value     = strdup(val);
+   entry->next      = NULL;
+   conf->modified   = true;
+
+   if (last)
+      last->next    = entry;
+   else
+      conf->entries = entry;
+
+   conf->last       = entry;
+
+   RHMAP_SET_STR(conf->entries_map, entry->key, entry);
+}
+
+void config_unset(config_file_t *conf, const char *key)
+{
+   struct config_entry_list *last  = NULL;
+   struct config_entry_list *entry = NULL;
+
+   if (!conf || !key)
+      return;
+
+   last  = conf->entries;
+   entry = config_get_entry_internal(conf, key, &last);
+
+   if (!entry)
+      return;
+
+   (void)RHMAP_DEL_STR(conf->entries_map, entry->key);
+
+   if (entry->key)
+      free(entry->key);
+
+   if (entry->value)
+      free(entry->value);
+
+   entry->key     = NULL;
+   entry->value   = NULL;
+   conf->modified = true;
+}
+
+void config_set_path(config_file_t *conf, const char *entry, const char *val)
+{
+#if defined(RARCH_CONSOLE) || !defined(RARCH_INTERNAL)
+   config_set_string(conf, entry, val);
+#else
+   char buf[PATH_MAX_LENGTH];
+
+   buf[0] = '\0';
+   fill_pathname_abbreviate_special(buf, val, sizeof(buf));
+   config_set_string(conf, entry, buf);
+#endif
+}
+
+void config_set_double(config_file_t *conf, const char *key, double val)
+{
+   char buf[320];
+#ifdef __cplusplus
+   snprintf(buf, sizeof(buf), "%f", (float)val);
+#elif defined(__STDC_VERSION__) && __STDC_VERSION__>=199901L
+   snprintf(buf, sizeof(buf), "%lf", val);
+#else
+   snprintf(buf, sizeof(buf), "%f", (float)val);
+#endif
+   config_set_string(conf, key, buf);
+}
+
+void config_set_float(config_file_t *conf, const char *key, float val)
+{
+   char buf[64];
+   snprintf(buf, sizeof(buf), "%f", val);
+   config_set_string(conf, key, buf);
+}
+
+void config_set_int(config_file_t *conf, const char *key, int val)
+{
+   char buf[16];
+   snprintf(buf, sizeof(buf), "%d", val);
+   config_set_string(conf, key, buf);
+}
+
+void config_set_uint(config_file_t *conf, const char *key, unsigned int val)
+{
+   char buf[16];
+   snprintf(buf, sizeof(buf), "%u", val);
+   config_set_string(conf, key, buf);
+}
+
+void config_set_hex(config_file_t *conf, const char *key, unsigned val)
+{
+   char buf[16];
+   snprintf(buf, sizeof(buf), "%x", val);
+   config_set_string(conf, key, buf);
+}
+
+void config_set_uint64(config_file_t *conf, const char *key, uint64_t val)
+{
+   char buf[32];
+   snprintf(buf, sizeof(buf), "%" PRIu64, val);
+   config_set_string(conf, key, buf);
+}
+
+void config_set_char(config_file_t *conf, const char *key, char val)
+{
+   char buf[2];
+   snprintf(buf, sizeof(buf), "%c", val);
+   config_set_string(conf, key, buf);
+}
+
+void config_set_bool(config_file_t *conf, const char *key, bool val)
+{
+   config_set_string(conf, key, val ? "true" : "false");
+}
+
+bool config_file_write(config_file_t *conf, const char *path, bool sort)
+{
+   if (!conf)
+      return false;
+
+   if (!conf->modified)
+      return true;
+
+   if (!string_is_empty(path))
+   {
+#ifdef ORBIS
+      int fd     = orbisOpen(path,O_RDWR|O_CREAT,0644);
+      if (fd < 0)
+         return false;
+      config_file_dump_orbis(conf,fd);
+      orbisClose(fd);
+#else
+      void* buf  = NULL;
+      FILE *file = (FILE*)fopen_utf8(path, "wb");
+      if (!file)
+         return false;
+
+      /* TODO: this is only useful for a few platforms, find which and add ifdef */
+#if !defined(PSP)
+      buf = calloc(1, 0x4000);
+      setvbuf(file, (char*)buf, _IOFBF, 0x4000);
+#endif
+
+      config_file_dump(conf, file, sort);
+
+      if (file != stdout)
+         fclose(file);
+      if (buf)
+         free(buf);
+#endif
+
+      /* Only update modified flag if config file
+       * is actually written to disk */
+      conf->modified = false;
+   }
+   else
+      config_file_dump(conf, stdout, sort);
+
+   return true;
+}
+
+#ifdef ORBIS
+void config_file_dump_orbis(config_file_t *conf, int fd)
+{
+   struct config_entry_list       *list = NULL;
+   struct config_include_list *includes = conf->includes;
+  
+   if (conf->reference)
+   {
+      pathname_make_slashes_portable(conf->reference);
+      fprintf(file, "#reference \"%s\"\n", conf->reference);
+   }
+
+
+   list          = config_file_merge_sort_linked_list(
+         (struct config_entry_list*)conf->entries,
+         config_file_sort_compare_func);
+   conf->entries = list;
+
+   while (list)
+   {
+      if (!list->readonly && list->key)
+      {
+         char newlist[256];
+         snprintf(newlist, sizeof(newlist),
+               "%s = %s\n", list->key, list->value);
+         orbisWrite(fd, newlist, strlen(newlist));
+      }
+      list = list->next;
+   }
+
+   /* Config files are read from the top down - if
+    * duplicate entries are found then the topmost
+    * one in the list takes precedence. This means
+    * '#include' directives must go *after* individual
+    * config entries, otherwise they will override
+    * any custom-set values */
+   while (includes)
+   {
+      char cad[256];
+      snprintf(cad, sizeof(cad),
+            "#include %s\n", includes->path);
+      orbisWrite(fd, cad, strlen(cad));
+      includes = includes->next;
+   }
+}
+#endif
+
+void config_file_dump(config_file_t *conf, FILE *file, bool sort)
+{
+   struct config_entry_list       *list = NULL;
+   struct config_include_list *includes = conf->includes;
+
+   if (conf->reference)
+   {
+      pathname_make_slashes_portable(conf->reference);
+      fprintf(file, "#reference \"%s\"\n", conf->reference);
+   }
+
+   if (sort)
+      list = config_file_merge_sort_linked_list(
+            (struct config_entry_list*)conf->entries,
+            config_file_sort_compare_func);
+   else
+      list = (struct config_entry_list*)conf->entries;
+
+   conf->entries = list;
+
+   while (list)
+   {
+      if (!list->readonly && list->key)
+         fprintf(file, "%s = \"%s\"\n", list->key, list->value);
+      list = list->next;
+   }
+
+   /* Config files are read from the top down - if
+    * duplicate entries are found then the topmost
+    * one in the list takes precedence. This means
+    * '#include' directives must go *after* individual
+    * config entries, otherwise they will override
+    * any custom-set values */
+   while (includes)
+   {
+      fprintf(file, "#include \"%s\"\n", includes->path);
+      includes = includes->next;
+   }
+}
+
+bool config_entry_exists(config_file_t *conf, const char *entry)
+{
+   return (bool)RHMAP_HAS_STR(conf->entries_map, entry);
+}
+
+bool config_get_entry_list_head(config_file_t *conf,
+      struct config_file_entry *entry)
+{
+   const struct config_entry_list *head = conf->entries;
+
+   if (!head)
+      return false;
+
+   entry->key   = head->key;
+   entry->value = head->value;
+   entry->next  = head->next;
+   return true;
+}
+
+bool config_get_entry_list_next(struct config_file_entry *entry)
+{
+   const struct config_entry_list *next = entry->next;
+
+   if (!next)
+      return false;
+
+   entry->key   = next->key;
+   entry->value = next->value;
+   entry->next  = next->next;
+   return true;
+}
+
+bool config_file_exists(const char *path)
+{
+   config_file_t conf;
+   config_file_initialize(&conf);
+   if (config_file_load_internal(&conf, path, 0, NULL) == 1)
+      return false;
+
+   config_file_deinitialize(&conf);
+   return true;
+}
diff --git a/ThirdParty/RetroArch/libretro-common/file/config_file_userdata.c b/ThirdParty/RetroArch/libretro-common/file/config_file_userdata.c
new file mode 100644
index 000000000..799ce5f2a
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/file/config_file_userdata.c
@@ -0,0 +1,171 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (config_file_userdata.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <file/file_path.h>
+#include <lists/string_list.h>
+
+#include <file/config_file_userdata.h>
+
+int config_userdata_get_float(void *userdata, const char *key_str,
+      float *value, float default_value)
+{
+   bool got;
+   char key[2][256];
+   struct config_file_userdata *usr = (struct config_file_userdata*)userdata;
+
+   fill_pathname_join_delim(key[0], usr->prefix[0], key_str, '_', sizeof(key[0]));
+   fill_pathname_join_delim(key[1], usr->prefix[1], key_str, '_', sizeof(key[1]));
+
+   got = config_get_float  (usr->conf, key[0], value);
+   got = got || config_get_float(usr->conf, key[1], value);
+
+   if (!got)
+      *value = default_value;
+   return got;
+}
+
+int config_userdata_get_int(void *userdata, const char *key_str,
+      int *value, int default_value)
+{
+   bool got;
+   char key[2][256];
+   struct config_file_userdata *usr = (struct config_file_userdata*)userdata;
+
+   fill_pathname_join_delim(key[0], usr->prefix[0], key_str, '_', sizeof(key[0]));
+   fill_pathname_join_delim(key[1], usr->prefix[1], key_str, '_', sizeof(key[1]));
+
+   got = config_get_int  (usr->conf, key[0], value);
+   got = got || config_get_int(usr->conf, key[1], value);
+
+   if (!got)
+      *value = default_value;
+   return got;
+}
+
+int config_userdata_get_hex(void *userdata, const char *key_str,
+      unsigned *value, unsigned default_value)
+{
+   bool got;
+   char key[2][256];
+   struct config_file_userdata *usr = (struct config_file_userdata*)userdata;
+
+   fill_pathname_join_delim(key[0], usr->prefix[0], key_str, '_', sizeof(key[0]));
+   fill_pathname_join_delim(key[1], usr->prefix[1], key_str, '_', sizeof(key[1]));
+
+   got = config_get_hex(usr->conf, key[0], value);
+   got = got || config_get_hex(usr->conf, key[1], value);
+
+   if (!got)
+      *value = default_value;
+   return got;
+}
+
+int config_userdata_get_float_array(void *userdata, const char *key_str,
+      float **values, unsigned *out_num_values,
+      const float *default_values, unsigned num_default_values)
+{
+   char key[2][256];
+   struct config_file_userdata *usr = (struct config_file_userdata*)userdata;
+   char *str = NULL;
+
+   fill_pathname_join_delim(key[0], usr->prefix[0], key_str, '_', sizeof(key[0]));
+   fill_pathname_join_delim(key[1], usr->prefix[1], key_str, '_', sizeof(key[1]));
+
+   if (  config_get_string(usr->conf, key[0], &str) ||
+         config_get_string(usr->conf, key[1], &str))
+   {
+      unsigned i;
+      struct string_list list = {0};
+      string_list_initialize(&list);
+      string_split_noalloc(&list, str, " ");
+      *values = (float*)calloc(list.size, sizeof(float));
+      for (i = 0; i < list.size; i++)
+         (*values)[i] = (float)strtod(list.elems[i].data, NULL);
+      *out_num_values = (unsigned)list.size;
+      string_list_deinitialize(&list);
+      free(str);
+      return true;
+   }
+
+   *values = (float*)calloc(num_default_values, sizeof(float));
+   memcpy(*values, default_values, sizeof(float) * num_default_values);
+   *out_num_values = num_default_values;
+   return false;
+}
+
+int config_userdata_get_int_array(void *userdata, const char *key_str,
+      int **values, unsigned *out_num_values,
+      const int *default_values, unsigned num_default_values)
+{
+   char key[2][256];
+   struct config_file_userdata *usr = (struct config_file_userdata*)userdata;
+   char *str = NULL;
+   fill_pathname_join_delim(key[0], usr->prefix[0], key_str, '_', sizeof(key[0]));
+   fill_pathname_join_delim(key[1], usr->prefix[1], key_str, '_', sizeof(key[1]));
+
+   if (  config_get_string(usr->conf, key[0], &str) ||
+         config_get_string(usr->conf, key[1], &str))
+   {
+      unsigned i;
+      struct string_list list = {0};
+      string_list_initialize(&list);
+      string_split_noalloc(&list, str, " ");
+      *values = (int*)calloc(list.size, sizeof(int));
+      for (i = 0; i < list.size; i++)
+         (*values)[i] = (int)strtod(list.elems[i].data, NULL);
+      *out_num_values = (unsigned)list.size;
+      string_list_deinitialize(&list);
+      free(str);
+      return true;
+   }
+
+   *values = (int*)calloc(num_default_values, sizeof(int));
+   memcpy(*values, default_values, sizeof(int) * num_default_values);
+   *out_num_values = num_default_values;
+   return false;
+}
+
+int config_userdata_get_string(void *userdata, const char *key_str,
+      char **output, const char *default_output)
+{
+   char key[2][256];
+   struct config_file_userdata *usr = (struct config_file_userdata*)userdata;
+   char *str = NULL;
+   fill_pathname_join_delim(key[0], usr->prefix[0], key_str, '_', sizeof(key[0]));
+   fill_pathname_join_delim(key[1], usr->prefix[1], key_str, '_', sizeof(key[1]));
+
+   if (  config_get_string(usr->conf, key[0], &str) ||
+         config_get_string(usr->conf, key[1], &str))
+   {
+      *output = str;
+      return true;
+   }
+
+   *output = strdup(default_output);
+   return false;
+}
+
+void config_userdata_free(void *ptr)
+{
+   if (ptr)
+      free(ptr);
+}
diff --git a/ThirdParty/RetroArch/libretro-common/file/file_path.c b/ThirdParty/RetroArch/libretro-common/file/file_path.c
new file mode 100644
index 000000000..926e837ad
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/file/file_path.c
@@ -0,0 +1,1391 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (file_path.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <errno.h>
+
+#include <sys/stat.h>
+
+#include <boolean.h>
+#include <file/file_path.h>
+#include <retro_assert.h>
+#include <retro_miscellaneous.h>
+#include <string/stdstring.h>
+#include <time/rtime.h>
+
+/* TODO: There are probably some unnecessary things on this huge include list now but I'm too afraid to touch it */
+#ifdef __APPLE__
+#include <CoreFoundation/CoreFoundation.h>
+#endif
+#ifdef __HAIKU__
+#include <kernel/image.h>
+#endif
+#ifndef __MACH__
+#include <compat/strl.h>
+#include <compat/posix_string.h>
+#endif
+#include <retro_miscellaneous.h>
+#include <encodings/utf.h>
+
+#ifdef _WIN32
+#include <direct.h>
+#else
+#include <unistd.h> /* stat() is defined here */
+#endif
+
+#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
+#ifdef __WINRT__
+#include <uwp/uwp_func.h>
+#endif
+#endif
+
+/* Assume W-functions do not work below Win2K and Xbox platforms */
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500 || defined(_XBOX)
+
+#ifndef LEGACY_WIN32
+#define LEGACY_WIN32
+#endif
+
+#endif
+
+/**
+ * path_get_archive_delim:
+ * @path               : path
+ *
+ * Find delimiter of an archive file. Only the first '#'
+ * after a compression extension is considered.
+ *
+ * Returns: pointer to the delimiter in the path if it contains
+ * a path inside a compressed file, otherwise NULL.
+ */
+const char *path_get_archive_delim(const char *path)
+{
+   const char *last_slash = find_last_slash(path);
+   const char *delim      = NULL;
+   char buf[5];
+
+   buf[0] = '\0';
+
+   /* We search for delimiters after the last slash
+    * in the file path to avoid capturing delimiter
+    * characters in any parent directory names.
+    * If there are no slashes in the file name, then
+    * the path is just the file basename - in this
+    * case we search the path in its entirety */
+   if (!last_slash)
+      last_slash = path;
+
+   /* Find delimiter position
+    * > Since filenames may contain '#' characters,
+    *   must loop until we find the first '#' that
+    *   is directly *after* a compression extension */
+   delim = strchr(last_slash, '#');
+
+   while (delim)
+   {
+      /* Check whether this is a known archive type
+       * > Note: The code duplication here is
+       *   deliberate, to maximise performance */
+      if (delim - last_slash > 4)
+      {
+         strlcpy(buf, delim - 4, sizeof(buf));
+         buf[4] = '\0';
+
+         string_to_lower(buf);
+
+         /* Check if this is a '.zip', '.apk' or '.7z' file */
+         if (string_is_equal(buf,     ".zip") ||
+             string_is_equal(buf,     ".apk") ||
+             string_is_equal(buf + 1, ".7z"))
+            return delim;
+      }
+      else if (delim - last_slash > 3)
+      {
+         strlcpy(buf, delim - 3, sizeof(buf));
+         buf[3] = '\0';
+
+         string_to_lower(buf);
+
+         /* Check if this is a '.7z' file */
+         if (string_is_equal(buf, ".7z"))
+            return delim;
+      }
+
+      delim++;
+      delim = strchr(delim, '#');
+   }
+
+   return NULL;
+}
+
+/**
+ * path_get_extension:
+ * @path               : path
+ *
+ * Gets extension of file. Only '.'s
+ * after the last slash are considered.
+ *
+ * Returns: extension part from the path.
+ */
+const char *path_get_extension(const char *path)
+{
+   const char *ext;
+   if (!string_is_empty(path) && ((ext = strrchr(path_basename(path), '.'))))
+      return ext + 1;
+   return "";
+}
+
+/**
+ * path_remove_extension:
+ * @path               : path
+ *
+ * Mutates path by removing its extension. Removes all
+ * text after and including the last '.'.
+ * Only '.'s after the last slash are considered.
+ *
+ * Returns:
+ * 1) If path has an extension, returns path with the
+ *    extension removed.
+ * 2) If there is no extension, returns NULL.
+ * 3) If path is empty or NULL, returns NULL
+ */
+char *path_remove_extension(char *path)
+{
+   char *last = !string_is_empty(path)
+      ? (char*)strrchr(path_basename(path), '.') : NULL;
+   if (!last)
+      return NULL;
+   if (*last)
+      *last = '\0';
+   return path;
+}
+
+/**
+ * path_is_compressed_file:
+ * @path               : path
+ *
+ * Checks if path is a compressed file.
+ *
+ * Returns: true (1) if path is a compressed file, otherwise false (0).
+ **/
+bool path_is_compressed_file(const char* path)
+{
+   const char *ext = path_get_extension(path);
+   if (!string_is_empty(ext))
+      if (  string_is_equal_noncase(ext, "zip") ||
+            string_is_equal_noncase(ext, "apk") ||
+            string_is_equal_noncase(ext, "7z"))
+         return true;
+   return false;
+}
+
+/**
+ * fill_pathname:
+ * @out_path           : output path
+ * @in_path            : input  path
+ * @replace            : what to replace
+ * @size               : buffer size of output path
+ *
+ * FIXME: Verify
+ *
+ * Replaces filename extension with 'replace' and outputs result to out_path.
+ * The extension here is considered to be the string from the last '.'
+ * to the end.
+ *
+ * Only '.'s after the last slash are considered as extensions.
+ * If no '.' is present, in_path and replace will simply be concatenated.
+ * 'size' is buffer size of 'out_path'.
+ * E.g.: in_path = "/foo/bar/baz/boo.c", replace = ".asm" =>
+ * out_path = "/foo/bar/baz/boo.asm"
+ * E.g.: in_path = "/foo/bar/baz/boo.c", replace = ""     =>
+ * out_path = "/foo/bar/baz/boo"
+ */
+void fill_pathname(char *out_path, const char *in_path,
+      const char *replace, size_t size)
+{
+   char tmp_path[PATH_MAX_LENGTH];
+   char *tok                      = NULL;
+
+   tmp_path[0] = '\0';
+
+   strlcpy(tmp_path, in_path, sizeof(tmp_path));
+   if ((tok = (char*)strrchr(path_basename(tmp_path), '.')))
+      *tok = '\0';
+
+   fill_pathname_noext(out_path, tmp_path, replace, size);
+}
+
+/**
+ * fill_pathname_noext:
+ * @out_path           : output path
+ * @in_path            : input  path
+ * @replace            : what to replace
+ * @size               : buffer size of output path
+ *
+ * Appends a filename extension 'replace' to 'in_path', and outputs
+ * result in 'out_path'.
+ *
+ * Assumes in_path has no extension. If an extension is still
+ * present in 'in_path', it will be ignored.
+ *
+ */
+size_t fill_pathname_noext(char *out_path, const char *in_path,
+      const char *replace, size_t size)
+{
+   strlcpy(out_path, in_path, size);
+   return strlcat(out_path, replace, size);
+}
+
+char *find_last_slash(const char *str)
+{
+   const char *slash     = strrchr(str, '/');
+#ifdef _WIN32
+   const char *backslash = strrchr(str, '\\');
+
+   if (!slash || (backslash > slash))
+      return (char*)backslash;
+#endif
+   return (char*)slash;
+}
+
+/**
+ * fill_pathname_slash:
+ * @path               : path
+ * @size               : size of path
+ *
+ * Assumes path is a directory. Appends a slash
+ * if not already there.
+ **/
+void fill_pathname_slash(char *path, size_t size)
+{
+   size_t path_len;
+   const char *last_slash = find_last_slash(path);
+
+   if (!last_slash)
+   {
+      strlcat(path, PATH_DEFAULT_SLASH(), size);
+      return;
+   }
+
+   path_len               = strlen(path);
+   /* Try to preserve slash type. */
+   if (last_slash != (path + path_len - 1))
+   {
+      path[path_len]   = last_slash[0];
+      path[path_len+1] = '\0';
+   }
+}
+
+/**
+ * fill_pathname_dir:
+ * @in_dir             : input directory path
+ * @in_basename        : input basename to be appended to @in_dir
+ * @replace            : replacement to be appended to @in_basename
+ * @size               : size of buffer
+ *
+ * Appends basename of 'in_basename', to 'in_dir', along with 'replace'.
+ * Basename of in_basename is the string after the last '/' or '\\',
+ * i.e the filename without directories.
+ *
+ * If in_basename has no '/' or '\\', the whole 'in_basename' will be used.
+ * 'size' is buffer size of 'in_dir'.
+ *
+ * E.g..: in_dir = "/tmp/some_dir", in_basename = "/some_content/foo.c",
+ * replace = ".asm" => in_dir = "/tmp/some_dir/foo.c.asm"
+ **/
+size_t fill_pathname_dir(char *in_dir, const char *in_basename,
+      const char *replace, size_t size)
+{
+   const char *base = NULL;
+
+   fill_pathname_slash(in_dir, size);
+   base = path_basename(in_basename);
+   strlcat(in_dir, base, size);
+   return strlcat(in_dir, replace, size);
+}
+
+/**
+ * fill_pathname_base:
+ * @out                : output path
+ * @in_path            : input path
+ * @size               : size of output path
+ *
+ * Copies basename of @in_path into @out_path.
+ **/
+size_t fill_pathname_base(char *out, const char *in_path, size_t size)
+{
+   const char     *ptr = path_basename(in_path);
+
+   if (!ptr)
+      ptr = in_path;
+
+   return strlcpy(out, ptr, size);
+}
+
+void fill_pathname_base_noext(char *out,
+      const char *in_path, size_t size)
+{
+   fill_pathname_base(out, in_path, size);
+   path_remove_extension(out);
+}
+
+size_t fill_pathname_base_ext(char *out,
+      const char *in_path, const char *ext,
+      size_t size)
+{
+   fill_pathname_base_noext(out, in_path, size);
+   return strlcat(out, ext, size);
+}
+
+/**
+ * fill_pathname_basedir:
+ * @out_dir            : output directory
+ * @in_path            : input path
+ * @size               : size of output directory
+ *
+ * Copies base directory of @in_path into @out_path.
+ * If in_path is a path without any slashes (relative current directory),
+ * @out_path will get path "./".
+ **/
+void fill_pathname_basedir(char *out_dir,
+      const char *in_path, size_t size)
+{
+   if (out_dir != in_path)
+      strlcpy(out_dir, in_path, size);
+   path_basedir(out_dir);
+}
+
+void fill_pathname_basedir_noext(char *out_dir,
+      const char *in_path, size_t size)
+{
+   fill_pathname_basedir(out_dir, in_path, size);
+   path_remove_extension(out_dir);
+}
+
+/**
+ * fill_pathname_parent_dir_name:
+ * @out_dir            : output directory
+ * @in_dir             : input directory
+ * @size               : size of output directory
+ *
+ * Copies only the parent directory name of @in_dir into @out_dir.
+ * The two buffers must not overlap. Removes trailing '/'.
+ * Returns true on success, false if a slash was not found in the path.
+ **/
+bool fill_pathname_parent_dir_name(char *out_dir,
+      const char *in_dir, size_t size)
+{
+   bool success = false;
+   char *temp   = strdup(in_dir);
+   char *last   = find_last_slash(temp);
+
+   if (last && last[1] == 0)
+   {
+      *last     = '\0';
+      last      = find_last_slash(temp);
+   }
+
+   /* Cut the last part of the string (the filename) after the slash,
+      leaving the directory name (or nested directory names) only. */
+   if (last)
+      *last     = '\0';
+
+   /* Point in_dir to the address of the last slash. */
+   in_dir       = find_last_slash(temp);
+
+   /* If find_last_slash returns NULL, it means there was no slash in temp,
+      so use temp as-is. */
+   if (!in_dir)
+       in_dir   = temp;
+
+   success      = in_dir && in_dir[1];
+
+   if (success)
+   {
+       /* If path starts with an slash, eliminate it. */
+       if (path_is_absolute(in_dir))
+           strlcpy(out_dir, in_dir + 1, size);
+       else
+           strlcpy(out_dir, in_dir, size);
+   }
+
+   free(temp);
+   return success;
+}
+
+/**
+ * fill_pathname_parent_dir:
+ * @out_dir            : output directory
+ * @in_dir             : input directory
+ * @size               : size of output directory
+ *
+ * Copies parent directory of @in_dir into @out_dir.
+ * Assumes @in_dir is a directory. Keeps trailing '/'.
+ * If the path was already at the root directory, @out_dir will be an empty string.
+ **/
+void fill_pathname_parent_dir(char *out_dir,
+      const char *in_dir, size_t size)
+{
+   if (out_dir != in_dir)
+      strlcpy(out_dir, in_dir, size);
+   path_parent_dir(out_dir);
+}
+
+/**
+ * fill_dated_filename:
+ * @out_filename       : output filename
+ * @ext                : extension of output filename
+ * @size               : buffer size of output filename
+ *
+ * Creates a 'dated' filename prefixed by 'RetroArch', and
+ * concatenates extension (@ext) to it.
+ *
+ * E.g.:
+ * out_filename = "RetroArch-{month}{day}-{Hours}{Minutes}.{@ext}"
+ **/
+size_t fill_dated_filename(char *out_filename,
+      const char *ext, size_t size)
+{
+   time_t cur_time = time(NULL);
+   struct tm tm_;
+
+   rtime_localtime(&cur_time, &tm_);
+
+   strftime(out_filename, size,
+         "RetroArch-%m%d-%H%M%S", &tm_);
+   return strlcat(out_filename, ext, size);
+}
+
+/**
+ * fill_str_dated_filename:
+ * @out_filename       : output filename
+ * @in_str             : input string
+ * @ext                : extension of output filename
+ * @size               : buffer size of output filename
+ *
+ * Creates a 'dated' filename prefixed by the string @in_str, and
+ * concatenates extension (@ext) to it.
+ *
+ * E.g.:
+ * out_filename = "RetroArch-{year}{month}{day}-{Hour}{Minute}{Second}.{@ext}"
+ **/
+void fill_str_dated_filename(char *out_filename,
+      const char *in_str, const char *ext, size_t size)
+{
+   char format[256];
+   struct tm tm_;
+   time_t cur_time = time(NULL);
+
+   format[0]       = '\0';
+
+   rtime_localtime(&cur_time, &tm_);
+
+   if (string_is_empty(ext))
+   {
+      strftime(format, sizeof(format), "-%y%m%d-%H%M%S", &tm_);
+      fill_pathname_noext(out_filename, in_str, format, size);
+   }
+   else
+   {
+      strftime(format, sizeof(format), "-%y%m%d-%H%M%S.", &tm_);
+
+      fill_pathname_join_concat_noext(out_filename,
+            in_str, format, ext,
+            size);
+   }
+}
+
+/**
+ * path_basedir:
+ * @path               : path
+ *
+ * Extracts base directory by mutating path.
+ * Keeps trailing '/'.
+ **/
+void path_basedir(char *path)
+{
+   char *last = NULL;
+
+   if (strlen(path) < 2)
+      return;
+
+   last = find_last_slash(path);
+
+   if (last)
+      last[1] = '\0';
+   else
+      strlcpy(path, "." PATH_DEFAULT_SLASH(), 3);
+}
+
+/**
+ * path_parent_dir:
+ * @path               : path
+ *
+ * Extracts parent directory by mutating path.
+ * Assumes that path is a directory. Keeps trailing '/'.
+ * If the path was already at the root directory, returns empty string
+ **/
+void path_parent_dir(char *path)
+{
+   size_t len = 0;
+
+   if (!path)
+      return;
+   
+   len = strlen(path);
+
+   if (len && PATH_CHAR_IS_SLASH(path[len - 1]))
+   {
+      bool path_was_absolute = path_is_absolute(path);
+
+      path[len - 1] = '\0';
+
+      if (path_was_absolute && !find_last_slash(path))
+      {
+         /* We removed the only slash from what used to be an absolute path.
+          * On Linux, this goes from "/" to an empty string and everything works fine,
+          * but on Windows, we went from C:\ to C:, which is not a valid path and that later
+          * gets errornously treated as a relative one by path_basedir and returns "./".
+          * What we really wanted is an empty string. */
+         path[0] = '\0';
+         return;
+      }
+   }
+   path_basedir(path);
+}
+
+/**
+ * path_basename:
+ * @path               : path
+ *
+ * Get basename from @path.
+ *
+ * Returns: basename from path.
+ **/
+const char *path_basename(const char *path)
+{
+   /* We cut at the first compression-related hash */
+   const char *delim = path_get_archive_delim(path);
+   if (delim)
+      return delim + 1;
+
+   {
+      /* We cut at the last slash */
+      const char *last  = find_last_slash(path);
+      if (last)
+         return last + 1;
+   }
+
+   return path;
+}
+
+/* Specialized version */
+const char *path_basename_nocompression(const char *path)
+{
+   /* We cut at the last slash */
+   const char *last  = find_last_slash(path);
+   if (last)
+      return last + 1;
+   return path;
+}
+
+/**
+ * path_is_absolute:
+ * @path               : path
+ *
+ * Checks if @path is an absolute path or a relative path.
+ *
+ * Returns: true if path is absolute, false if path is relative.
+ **/
+bool path_is_absolute(const char *path)
+{
+   if (string_is_empty(path))
+      return false;
+
+   if (path[0] == '/')
+      return true;
+
+#if defined(_WIN32)
+   /* Many roads lead to Rome...
+    * Note: Drive letter can only be 1 character long */
+   if (string_starts_with_size(path,     "\\\\", STRLEN_CONST("\\\\")) ||
+       string_starts_with_size(path + 1, ":/",   STRLEN_CONST(":/"))   ||
+       string_starts_with_size(path + 1, ":\\",  STRLEN_CONST(":\\")))
+      return true;
+#elif defined(__wiiu__) || defined(VITA)
+   {
+      const char *seperator = strchr(path, ':');
+      if (seperator && (seperator[1] == '/'))
+         return true;
+   }
+#endif
+
+   return false;
+}
+
+/**
+ * path_resolve_realpath:
+ * @buf                : input and output buffer for path
+ * @size               : size of buffer
+ * @resolve_symlinks   : whether to resolve symlinks or not
+ *
+ * Resolves use of ".", "..", multiple slashes etc in absolute paths.
+ *
+ * Relative paths are rebased on the current working dir.
+ *
+ * Returns: @buf if successful, NULL otherwise.
+ * Note: Not implemented on consoles
+ * Note: Symlinks are only resolved on Unix-likes
+ * Note: The current working dir might not be what you expect,
+ *       e.g. on Android it is "/"
+ *       Use of fill_pathname_resolve_relative() should be prefered
+ **/
+char *path_resolve_realpath(char *buf, size_t size, bool resolve_symlinks)
+{
+#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
+#ifdef _WIN32
+   char *ret = NULL;
+   wchar_t abs_path[PATH_MAX_LENGTH];
+   wchar_t *rel_path = utf8_to_utf16_string_alloc(buf);
+
+   if (rel_path)
+   {
+      if (_wfullpath(abs_path, rel_path, PATH_MAX_LENGTH))
+      {
+         char *tmp = utf16_to_utf8_string_alloc(abs_path);
+
+         if (tmp)
+         {
+            strlcpy(buf, tmp, size);
+            free(tmp);
+            ret = buf;
+         }
+      }
+
+      free(rel_path);
+   }
+
+   return ret;
+#else
+   char tmp[PATH_MAX_LENGTH];
+   size_t t;
+   char *p;
+   const char *next;
+   const char *buf_end;
+
+   if (resolve_symlinks)
+   {
+      strlcpy(tmp, buf, sizeof(tmp));
+
+      /* NOTE: realpath() expects at least PATH_MAX_LENGTH bytes in buf.
+       * Technically, PATH_MAX_LENGTH needn't be defined, but we rely on it anyways.
+       * POSIX 2008 can automatically allocate for you,
+       * but don't rely on that. */
+      if (!realpath(tmp, buf))
+      {
+         strlcpy(buf, tmp, size);
+         return NULL;
+      }
+
+      return buf;
+   }
+
+   t = 0; /* length of output */
+   buf_end = buf + strlen(buf);
+
+   if (!path_is_absolute(buf))
+   {
+      size_t len;
+      /* rebase on working directory */
+      if (!getcwd(tmp, PATH_MAX_LENGTH-1))
+         return NULL;
+
+      len = strlen(tmp);
+      t += len;
+
+      if (tmp[len-1] != '/')
+         tmp[t++] = '/';
+
+      if (string_is_empty(buf))
+         goto end;
+
+      p = buf;
+   }
+   else
+   {
+      /* UNIX paths can start with multiple '/', copy those */
+      for (p = buf; *p == '/'; p++)
+         tmp[t++] = '/';
+   }
+
+   /* p points to just after a slash while 'next' points to the next slash
+    * if there are no slashes, they point relative to where one would be */
+   do
+   {
+      next = strchr(p, '/');
+      if (!next)
+         next = buf_end;
+
+      if ((next - p == 2 && p[0] == '.' && p[1] == '.'))
+      {
+         p += 3;
+
+         /* fail for illegal /.., //.. etc */
+         if (t == 1 || tmp[t-2] == '/')
+            return NULL;
+
+         /* delete previous segment in tmp by adjusting size t
+          * tmp[t-1] == '/', find '/' before that */
+         t = t-2;
+         while (tmp[t] != '/')
+            t--;
+         t++;
+      }
+      else if (next - p == 1 && p[0] == '.')
+         p += 2;
+      else if (next - p == 0)
+         p += 1;
+      else
+      {
+         /* fail when truncating */
+         if (t + next-p+1 > PATH_MAX_LENGTH-1)
+            return NULL;
+
+         while (p <= next)
+            tmp[t++] = *p++;
+      }
+
+   }
+   while (next < buf_end);
+
+end:
+   tmp[t] = '\0';
+   strlcpy(buf, tmp, size);
+   return buf;
+#endif
+#endif
+   return NULL;
+}
+
+/**
+ * path_relative_to:
+ * @out                : buffer to write the relative path to
+ * @path               : path to be expressed relatively
+ * @base               : base directory to start out on
+ * @size               : size of output buffer
+ *
+ * Turns @path into a path relative to @base and writes it to @out.
+ *
+ * @base is assumed to be a base directory, i.e. a path ending with '/' or '\'.
+ * Both @path and @base are assumed to be absolute paths without "." or "..".
+ *
+ * E.g. path /a/b/e/f.cg with base /a/b/c/d/ turns into ../../e/f.cg
+ **/
+size_t path_relative_to(char *out,
+      const char *path, const char *base, size_t size)
+{
+   size_t i, j;
+   const char *trimmed_path, *trimmed_base;
+
+#ifdef _WIN32
+   /* For different drives, return absolute path */
+   if (strlen(path) >= 2 && strlen(base) >= 2
+         && path[1] == ':' && base[1] == ':'
+         && path[0] != base[0])
+      return strlcpy(out, path, size);
+#endif
+
+   /* Trim common beginning */
+   for (i = 0, j = 0; path[i] && base[i] && path[i] == base[i]; i++)
+      if (path[i] == PATH_DEFAULT_SLASH_C())
+         j = i + 1;
+
+   trimmed_path = path+j;
+   trimmed_base = base+i;
+
+   /* Each segment of base turns into ".." */
+   out[0] = '\0';
+   for (i = 0; trimmed_base[i]; i++)
+      if (trimmed_base[i] == PATH_DEFAULT_SLASH_C())
+         strlcat(out, ".." PATH_DEFAULT_SLASH(), size);
+
+   return strlcat(out, trimmed_path, size);
+}
+
+/**
+ * fill_pathname_resolve_relative:
+ * @out_path           : output path
+ * @in_refpath         : input reference path
+ * @in_path            : input path
+ * @size               : size of @out_path
+ *
+ * Joins basedir of @in_refpath together with @in_path.
+ * If @in_path is an absolute path, out_path = in_path.
+ * E.g.: in_refpath = "/foo/bar/baz.a", in_path = "foobar.cg",
+ * out_path = "/foo/bar/foobar.cg".
+ **/
+void fill_pathname_resolve_relative(char *out_path,
+      const char *in_refpath, const char *in_path, size_t size)
+{
+   if (path_is_absolute(in_path))
+   {
+      strlcpy(out_path, in_path, size);
+      return;
+   }
+
+   fill_pathname_basedir(out_path, in_refpath, size);
+   strlcat(out_path, in_path, size);
+   path_resolve_realpath(out_path, size, false);
+}
+
+/**
+ * fill_pathname_join:
+ * @out_path           : output path
+ * @dir                : directory
+ * @path               : path
+ * @size               : size of output path
+ *
+ * Joins a directory (@dir) and path (@path) together.
+ * Makes sure not to get  two consecutive slashes
+ * between directory and path.
+ **/
+size_t fill_pathname_join(char *out_path,
+      const char *dir, const char *path, size_t size)
+{
+   if (out_path != dir)
+      strlcpy(out_path, dir, size);
+
+   if (*out_path)
+      fill_pathname_slash(out_path, size);
+
+   return strlcat(out_path, path, size);
+}
+
+size_t fill_pathname_join_special_ext(char *out_path,
+      const char *dir,  const char *path,
+      const char *last, const char *ext,
+      size_t size)
+{
+   fill_pathname_join(out_path, dir, path, size);
+   if (*out_path)
+      fill_pathname_slash(out_path, size);
+
+   strlcat(out_path, last, size);
+   return strlcat(out_path, ext, size);
+}
+
+size_t fill_pathname_join_concat_noext(char *out_path,
+      const char *dir, const char *path,
+      const char *concat,
+      size_t size)
+{
+   fill_pathname_noext(out_path, dir, path, size);
+   return strlcat(out_path, concat, size);
+}
+
+size_t fill_pathname_join_concat(char *out_path,
+      const char *dir, const char *path,
+      const char *concat,
+      size_t size)
+{
+   fill_pathname_join(out_path, dir, path, size);
+   return strlcat(out_path, concat, size);
+}
+
+void fill_pathname_join_noext(char *out_path,
+      const char *dir, const char *path, size_t size)
+{
+   fill_pathname_join(out_path, dir, path, size);
+   path_remove_extension(out_path);
+}
+
+/**
+ * fill_pathname_join_delim:
+ * @out_path           : output path
+ * @dir                : directory
+ * @path               : path
+ * @delim              : delimiter
+ * @size               : size of output path
+ *
+ * Joins a directory (@dir) and path (@path) together
+ * using the given delimiter (@delim).
+ **/
+size_t fill_pathname_join_delim(char *out_path, const char *dir,
+      const char *path, const char delim, size_t size)
+{
+   size_t copied;
+   /* behavior of strlcpy is undefined if dst and src overlap */
+   if (out_path == dir)
+      copied = strlen(dir);
+   else
+      copied = strlcpy(out_path, dir, size);
+
+   out_path[copied]   = delim;
+   out_path[copied+1] = '\0';
+
+   if (path)
+      copied = strlcat(out_path, path, size);
+   return copied;
+}
+
+size_t fill_pathname_join_delim_concat(char *out_path, const char *dir,
+      const char *path, const char delim, const char *concat,
+      size_t size)
+{
+   fill_pathname_join_delim(out_path, dir, path, delim, size);
+   return strlcat(out_path, concat, size);
+}
+
+/**
+ * fill_short_pathname_representation:
+ * @out_rep            : output representation
+ * @in_path            : input path
+ * @size               : size of output representation
+ *
+ * Generates a short representation of path. It should only
+ * be used for displaying the result; the output representation is not
+ * binding in any meaningful way (for a normal path, this is the same as basename)
+ * In case of more complex URLs, this should cut everything except for
+ * the main image file.
+ *
+ * E.g.: "/path/to/game.img" -> game.img
+ *       "/path/to/myarchive.7z#folder/to/game.img" -> game.img
+ */
+size_t fill_short_pathname_representation(char* out_rep,
+      const char *in_path, size_t size)
+{
+   char path_short[NAME_MAX_LENGTH];
+
+   path_short[0] = '\0';
+
+   fill_pathname(path_short, path_basename(in_path), "",
+            sizeof(path_short));
+
+   return strlcpy(out_rep, path_short, size);
+}
+
+void fill_short_pathname_representation_noext(char* out_rep,
+      const char *in_path, size_t size)
+{
+   fill_short_pathname_representation(out_rep, in_path, size);
+   path_remove_extension(out_rep);
+}
+
+void fill_pathname_expand_special(char *out_path,
+      const char *in_path, size_t size)
+{
+#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
+   if (in_path[0] == '~')
+   {
+      char *home_dir = (char*)malloc(PATH_MAX_LENGTH * sizeof(char));
+
+      home_dir[0] = '\0';
+
+      fill_pathname_home_dir(home_dir,
+         PATH_MAX_LENGTH * sizeof(char));
+
+      if (*home_dir)
+      {
+         size_t src_size = strlcpy(out_path, home_dir, size);
+         retro_assert(src_size < size);
+
+         out_path  += src_size;
+         size      -= src_size;
+
+         if (!PATH_CHAR_IS_SLASH(out_path[-1]))
+         {
+            src_size = strlcpy(out_path, PATH_DEFAULT_SLASH(), size);
+            retro_assert(src_size < size);
+
+            out_path += src_size;
+            size     -= src_size;
+         }
+
+         in_path += 2;
+      }
+
+      free(home_dir);
+   }
+   else if (in_path[0] == ':')
+   {
+      char *application_dir = (char*)malloc(PATH_MAX_LENGTH * sizeof(char));
+
+      application_dir[0]    = '\0';
+
+      fill_pathname_application_dir(application_dir,
+            PATH_MAX_LENGTH * sizeof(char));
+
+      if (*application_dir)
+      {
+         size_t src_size   = strlcpy(out_path, application_dir, size);
+         retro_assert(src_size < size);
+
+         out_path  += src_size;
+         size      -= src_size;
+
+         if (!PATH_CHAR_IS_SLASH(out_path[-1]))
+         {
+            src_size = strlcpy(out_path, PATH_DEFAULT_SLASH(), size);
+            retro_assert(src_size < size);
+
+            out_path += src_size;
+            size     -= src_size;
+         }
+
+         in_path += 2;
+      }
+
+      free(application_dir);
+   }
+#endif
+
+   retro_assert(strlcpy(out_path, in_path, size) < size);
+}
+
+void fill_pathname_abbreviate_special(char *out_path,
+      const char *in_path, size_t size)
+{
+#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
+   unsigned i;
+   const char *candidates[3];
+   const char *notations[3];
+   char application_dir[PATH_MAX_LENGTH];
+   char home_dir[PATH_MAX_LENGTH];
+
+   application_dir[0] = '\0';
+   home_dir[0]        = '\0';
+
+   /* application_dir could be zero-string. Safeguard against this.
+    *
+    * Keep application dir in front of home, moving app dir to a
+    * new location inside home would break otherwise. */
+
+   /* ugly hack - use application_dir pointer
+    * before filling it in. C89 reasons */
+   candidates[0] = application_dir;
+   candidates[1] = home_dir;
+   candidates[2] = NULL;
+
+   notations [0] = ":";
+   notations [1] = "~";
+   notations [2] = NULL;
+
+   fill_pathname_application_dir(application_dir, sizeof(application_dir));
+   fill_pathname_home_dir(home_dir, sizeof(home_dir));
+
+   for (i = 0; candidates[i]; i++)
+   {
+      if (!string_is_empty(candidates[i]) &&
+          string_starts_with(in_path, candidates[i]))
+      {
+         size_t src_size  = strlcpy(out_path, notations[i], size);
+
+         retro_assert(src_size < size);
+
+         out_path        += src_size;
+         size            -= src_size;
+         in_path         += strlen(candidates[i]);
+
+         if (!PATH_CHAR_IS_SLASH(*in_path))
+         {
+            strcpy_literal(out_path, PATH_DEFAULT_SLASH());
+            out_path++;
+            size--;
+         }
+
+         break; /* Don't allow more abbrevs to take place. */
+      }
+   }
+
+#endif
+
+   retro_assert(strlcpy(out_path, in_path, size) < size);
+}
+
+/* Changes the slashes to the correct kind for the os 
+ * So forward slash on linux and backslash on Windows */
+void pathname_conform_slashes_to_os(char *path)
+{
+   /* Conform slashes to os standard so we get proper matching */
+   char* p;
+   for (p = path; *p; p++)
+      if (*p == '/' || *p == '\\')
+         *p = PATH_DEFAULT_SLASH_C();
+}
+
+/* Change all shashes to forward so they are more portable between windows and linux */
+void pathname_make_slashes_portable(char *path)
+{
+   /* Conform slashes to os standard so we get proper matching */
+   char* p;
+   for (p = path; *p; p++)
+      if (*p == '/' || *p == '\\')
+         *p = '/';
+}
+
+/* Get the number of slashes in a path, returns an integer */
+int get_pathname_num_slashes(const char *in_path)
+{
+   int num_slashes = 0;
+   int i = 0;
+
+   for (i = 0; i < PATH_MAX_LENGTH; i++)
+   {
+      if (PATH_CHAR_IS_SLASH(in_path[i]))
+         num_slashes++;
+      if (in_path[i] == '\0')
+         break;
+   }
+
+   return num_slashes;
+}
+
+/* Fills the supplied path with either the abbreviated path or the relative path, which ever
+ * one is has less depth / number of slashes
+ * If lengths of abbreviated and relative paths are the same the relative path will be used
+ * in_path can be an absolute, relative or abbreviated path */
+void fill_pathname_abbreviated_or_relative(char *out_path, const char *in_refpath, const char *in_path, size_t size)
+{
+   char in_path_conformed[PATH_MAX_LENGTH];
+   char in_refpath_conformed[PATH_MAX_LENGTH];
+   char expanded_path[PATH_MAX_LENGTH];
+   char absolute_path[PATH_MAX_LENGTH];
+   char relative_path[PATH_MAX_LENGTH];
+   char abbreviated_path[PATH_MAX_LENGTH];
+   
+   in_path_conformed[0]    = '\0';
+   in_refpath_conformed[0] = '\0';
+   expanded_path[0]        = '\0';
+   absolute_path[0]        = '\0';
+   relative_path[0]        = '\0';
+   abbreviated_path[0]     = '\0';
+
+   strcpy_literal(in_path_conformed, in_path);
+   strcpy_literal(in_refpath_conformed, in_refpath);
+
+   pathname_conform_slashes_to_os(in_path_conformed);
+   pathname_conform_slashes_to_os(in_refpath_conformed);
+
+   /* Expand paths which start with :\ to an absolute path */
+   fill_pathname_expand_special(expanded_path,
+         in_path_conformed, sizeof(expanded_path));
+
+   /* Get the absolute path if it is not already */
+   if (path_is_absolute(expanded_path))
+      strlcpy(absolute_path, expanded_path, PATH_MAX_LENGTH);
+   else
+      fill_pathname_resolve_relative(absolute_path,
+            in_refpath_conformed, in_path_conformed, PATH_MAX_LENGTH);
+
+   pathname_conform_slashes_to_os(absolute_path);
+
+   /* Get the relative path and see how many directories long it is */
+   path_relative_to(relative_path, absolute_path,
+         in_refpath_conformed, sizeof(relative_path));
+
+   /* Get the abbreviated path and see how many directories long it is */
+   fill_pathname_abbreviate_special(abbreviated_path,
+         absolute_path, sizeof(abbreviated_path));
+
+   /* Use the shortest path, preferring the relative path*/
+   if (  get_pathname_num_slashes(relative_path) <= 
+         get_pathname_num_slashes(abbreviated_path))
+      retro_assert(strlcpy(out_path, relative_path, size) < size);
+   else
+      retro_assert(strlcpy(out_path, abbreviated_path, size) < size);
+}
+
+/**
+ * path_basedir:
+ * @path               : path
+ *
+ * Extracts base directory by mutating path.
+ * Keeps trailing '/'.
+ **/
+void path_basedir_wrapper(char *path)
+{
+   char *last = NULL;
+   if (strlen(path) < 2)
+      return;
+
+#ifdef HAVE_COMPRESSION
+   /* We want to find the directory with the archive in basedir. */
+   last = (char*)path_get_archive_delim(path);
+   if (last)
+      *last = '\0';
+#endif
+
+   last = find_last_slash(path);
+
+   if (last)
+      last[1] = '\0';
+   else
+      strlcpy(path, "." PATH_DEFAULT_SLASH(), 3);
+}
+
+#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
+void fill_pathname_application_path(char *s, size_t len)
+{
+   size_t i;
+#ifdef __APPLE__
+  CFBundleRef bundle = CFBundleGetMainBundle();
+#endif
+#ifdef _WIN32
+   DWORD ret = 0;
+   wchar_t wstr[PATH_MAX_LENGTH] = {0};
+#endif
+#ifdef __HAIKU__
+   image_info info;
+   int32_t cookie = 0;
+#endif
+   (void)i;
+
+   if (!len)
+      return;
+
+#if defined(_WIN32)
+#ifdef LEGACY_WIN32
+   ret    = GetModuleFileNameA(NULL, s, len);
+#else
+   ret    = GetModuleFileNameW(NULL, wstr, ARRAY_SIZE(wstr));
+
+   if (*wstr)
+   {
+      char *str = utf16_to_utf8_string_alloc(wstr);
+
+      if (str)
+      {
+         strlcpy(s, str, len);
+         free(str);
+      }
+   }
+#endif
+   s[ret] = '\0';
+#elif defined(__APPLE__)
+   if (bundle)
+   {
+      CFURLRef bundle_url     = CFBundleCopyBundleURL(bundle);
+      CFStringRef bundle_path = CFURLCopyPath(bundle_url);
+      CFStringGetCString(bundle_path, s, len, kCFStringEncodingUTF8);
+#ifdef HAVE_COCOATOUCH
+      {
+         /* This needs to be done so that the path becomes 
+          * /private/var/... and this
+          * is used consistently throughout for the iOS bundle path */
+         char resolved_bundle_dir_buf[PATH_MAX_LENGTH] = {0};
+         if (realpath(s, resolved_bundle_dir_buf))
+         {
+            strlcpy(s, resolved_bundle_dir_buf, len - 1);
+            strlcat(s, "/", len);
+         }
+      }
+#endif
+
+      CFRelease(bundle_path);
+      CFRelease(bundle_url);
+#ifndef HAVE_COCOATOUCH
+      /* Not sure what this does but it breaks 
+       * stuff for iOS, so skipping */
+      retro_assert(strlcat(s, "nobin", len) < len);
+#endif
+      return;
+   }
+#elif defined(__HAIKU__)
+   while (get_next_image_info(0, &cookie, &info) == B_OK)
+   {
+      if (info.type == B_APP_IMAGE)
+      {
+         strlcpy(s, info.name, len);
+         return;
+      }
+   }
+#elif defined(__QNX__)
+   char *buff = malloc(len);
+
+   if (_cmdname(buff))
+      strlcpy(s, buff, len);
+
+   free(buff);
+#else
+   {
+      pid_t pid;
+      static const char *exts[] = { "exe", "file", "path/a.out" };
+      char link_path[255];
+
+      link_path[0] = *s = '\0';
+      pid       = getpid();
+
+      /* Linux, BSD and Solaris paths. Not standardized. */
+      for (i = 0; i < ARRAY_SIZE(exts); i++)
+      {
+         ssize_t ret;
+
+         snprintf(link_path, sizeof(link_path), "/proc/%u/%s",
+               (unsigned)pid, exts[i]);
+         ret = readlink(link_path, s, len - 1);
+
+         if (ret >= 0)
+         {
+            s[ret] = '\0';
+            return;
+         }
+      }
+   }
+#endif
+}
+
+void fill_pathname_application_dir(char *s, size_t len)
+{
+#ifdef __WINRT__
+   strlcpy(s, uwp_dir_install, len);
+#else
+   fill_pathname_application_path(s, len);
+   path_basedir_wrapper(s);
+#endif
+}
+
+void fill_pathname_home_dir(char *s, size_t len)
+{
+#ifdef __WINRT__
+   const char *home = uwp_dir_data;
+#else
+   const char *home = getenv("HOME");
+#endif
+   if (home)
+      strlcpy(s, home, len);
+   else
+      *s = 0;
+}
+#endif
+
+bool is_path_accessible_using_standard_io(const char *path)
+{
+#ifdef __WINRT__
+   DWORD trygetattrbs = GetFileAttributesA(path);
+   return trygetattrbs != INVALID_FILE_ATTRIBUTES;
+#else
+   return true;
+#endif
+}
diff --git a/ThirdParty/RetroArch/libretro-common/file/file_path_io.c b/ThirdParty/RetroArch/libretro-common/file/file_path_io.c
new file mode 100644
index 000000000..63587e392
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/file/file_path_io.c
@@ -0,0 +1,151 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (file_path_io.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <errno.h>
+
+#include <sys/stat.h>
+
+#include <boolean.h>
+#include <file/file_path.h>
+#include <retro_assert.h>
+#include <compat/strl.h>
+#include <compat/posix_string.h>
+#include <retro_miscellaneous.h>
+#include <string/stdstring.h>
+#define VFS_FRONTEND
+#include <vfs/vfs_implementation.h>
+
+#ifdef _WIN32
+#include <direct.h>
+#else
+#include <unistd.h> /* stat() is defined here */
+#endif
+
+/* TODO/FIXME - globals */
+static retro_vfs_stat_t path_stat_cb   = retro_vfs_stat_impl;
+static retro_vfs_mkdir_t path_mkdir_cb = retro_vfs_mkdir_impl;
+
+void path_vfs_init(const struct retro_vfs_interface_info* vfs_info)
+{
+   const struct retro_vfs_interface* 
+      vfs_iface           = vfs_info->iface;
+
+   path_stat_cb           = retro_vfs_stat_impl;
+   path_mkdir_cb          = retro_vfs_mkdir_impl;
+
+   if (vfs_info->required_interface_version < PATH_REQUIRED_VFS_VERSION || !vfs_iface)
+      return;
+
+   path_stat_cb           = vfs_iface->stat;
+   path_mkdir_cb          = vfs_iface->mkdir;
+}
+
+int path_stat(const char *path)
+{
+   return path_stat_cb(path, NULL);
+}
+
+/**
+ * path_is_directory:
+ * @path               : path
+ *
+ * Checks if path is a directory.
+ *
+ * Returns: true (1) if path is a directory, otherwise false (0).
+ */
+bool path_is_directory(const char *path)
+{
+   return (path_stat_cb(path, NULL) & RETRO_VFS_STAT_IS_DIRECTORY) != 0;
+}
+
+bool path_is_character_special(const char *path)
+{
+   return (path_stat_cb(path, NULL) & RETRO_VFS_STAT_IS_CHARACTER_SPECIAL) != 0;
+}
+
+bool path_is_valid(const char *path)
+{
+   return (path_stat_cb(path, NULL) & RETRO_VFS_STAT_IS_VALID) != 0;
+}
+
+int32_t path_get_size(const char *path)
+{
+   int32_t filesize = 0;
+   if (path_stat_cb(path, &filesize) != 0)
+      return filesize;
+
+   return -1;
+}
+
+/**
+ * path_mkdir:
+ * @dir                : directory
+ *
+ * Create directory on filesystem.
+ *
+ * Returns: true (1) if directory could be created, otherwise false (0).
+ **/
+bool path_mkdir(const char *dir)
+{
+   bool norecurse     = false;
+   char     *basedir  = NULL;
+
+   if (!(dir && *dir))
+      return false;
+
+   /* Use heap. Real chance of stack 
+    * overflow if we recurse too hard. */
+   basedir            = strdup(dir);
+
+   if (!basedir)
+	   return false;
+
+   path_parent_dir(basedir);
+
+   if (!*basedir || !strcmp(basedir, dir))
+   {
+      free(basedir);
+      return false;
+   }
+
+   if (     path_is_directory(basedir)
+         || path_mkdir(basedir))
+      norecurse = true;
+
+   free(basedir);
+
+   if (norecurse)
+   {
+      int ret = path_mkdir_cb(dir);
+
+      /* Don't treat this as an error. */
+      if (ret == -2 && path_is_directory(dir))
+         return true;
+      else if (ret == 0)
+         return true;
+   }
+   return false;
+}
diff --git a/ThirdParty/RetroArch/libretro-common/include/array/rhmap.h b/ThirdParty/RetroArch/libretro-common/include/array/rhmap.h
new file mode 100644
index 000000000..20558f784
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/array/rhmap.h
@@ -0,0 +1,284 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (rhmap.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_ARRAY_RHMAP_H__
+#define __LIBRETRO_SDK_ARRAY_RHMAP_H__
+
+/*
+ * This file implements a hash map with 32-bit keys.
+ * Based on the implementation from the public domain Bitwise project
+ * by Per Vognsen - https://github.com/pervognsen/bitwise
+ *
+ * It's a super simple type safe hash map for C with no need
+ * to predeclare any type or anything.
+ * Will always allocate memory for twice the amount of max elements
+ * so larger structs should be stored as pointers or indices to an array.
+ * Can be used in C++ with POD types (without any constructor/destructor).
+ *
+ * Be careful not to supply modifying statements to the macro arguments.
+ * Something like RHMAP_FIT(map, i++); would have unintended results.
+ *
+ * Sample usage:
+ *
+ * -- Set 2 elements with string keys and mytype_t values:
+ * mytype_t* map = NULL;
+ * RHMAP_SET_STR(map, "foo", foo_element);
+ * RHMAP_SET_STR(map, "bar", bar_element);
+ * -- now RHMAP_LEN(map) == 2, RHMAP_GET_STR(map, "foo") == foo_element
+ *
+ * -- Check if keys exist:
+ * bool has_foo = RHMAP_HAS_STR(map, "foo");
+ * bool has_baz = RHMAP_HAS_STR(map, "baz");
+ * -- now has_foo == true, has_baz == false
+ *
+ * -- Removing a key:
+ * bool removed = RHMAP_DEL_STR(map, "bar");
+ * bool removed_again = RHMAP_DEL_STR(map, "bar");
+ * -- now RHMAP_LEN(map) == 1, removed == true, removed_again == false
+ *
+ * -- Add/modify via pointer:
+ * mytype_t* p_elem = RHMAP_PTR_STR(map, "qux");
+ * p_elem->a = 123;
+ * -- New keys initially have memory uninitialized
+ * -- Pointers can get invalidated when a key is added/removed
+ *
+ * -- Looking up the index for a given key:
+ * ptrdiff_t idx_foo = RHMAP_IDX_STR(map, "foo");
+ * ptrdiff_t idx_invalid = RHMAP_IDX_STR(map, "invalid");
+ * -- now idx_foo >= 0, idx_invalid == -1, map[idx_foo] == foo_element
+ * -- Indices can change when a key is added/removed
+ *
+ * -- Clear all elements (keep memory allocated):
+ * RHMAP_CLEAR(map);
+ * -- now RHMAP_LEN(map) == 0, RHMAP_CAP(map) == 16
+ *
+ * -- Reserve memory for at least N elements:
+ * RHMAP_FIT(map, 30);
+ * -- now RHMAP_LEN(map) == 0, RHMAP_CAP(map) == 64
+ *
+ * -- Add elements with custom hash keys:
+ * RHMAP_SET(map, my_uint32_hash(key1), some_element);
+ * RHMAP_SET(map, my_uint32_hash(key2), other_element);
+ * -- now RHMAP_LEN(map) == 2, _GET/_HAS/_DEL/_PTR/_IDX also exist
+ *
+ * -- Iterate elements (random order, order can change on insert):
+ * for (size_t i = 0, cap = RHMAP_CAP(map); i != cap, i++)
+ *   if (RHMAP_KEY(map, i))
+ * ------ here map[i] is the value of key RHMAP_KEY(map, i)
+ *
+ * -- Set a custom null value (is zeroed by default):
+ * RHMAP_SETNULLVAL(map, map_null);
+ * -- now RHMAP_GET_STR(map, "invalid") == map_null
+ *
+ * -- Free allocated memory:
+ * RHMAP_FREE(map);
+ * -- now map == NULL, RHMAP_LEN(map) == 0, RHMAP_CAP(map) == 0
+ *
+ * -- To handle running out of memory:
+ * bool ran_out_of_memory = !RHMAP_TRYFIT(map, 1000);
+ * -- before setting an element (with SET, PTR or NULLVAL).
+ * -- When out of memory, map will stay unmodified.
+ *
+ */
+
+#include <stdlib.h> /* for malloc, realloc */
+#include <string.h> /* for memcpy, memset */
+#include <stddef.h> /* for ptrdiff_t, size_t */
+#include <stdint.h> /* for uint32_t */
+
+#define RHMAP_LEN(b) ((b) ? RHMAP__HDR(b)->len : 0)
+#define RHMAP_MAX(b) ((b) ? RHMAP__HDR(b)->maxlen : 0)
+#define RHMAP_CAP(b) ((b) ? RHMAP__HDR(b)->maxlen + 1 : 0)
+#define RHMAP_KEY(b, idx) (RHMAP__HDR(b)->keys[idx])
+#define RHMAP_KEY_STR(b, idx) (RHMAP__HDR(b)->key_strs[idx])
+#define RHMAP_SETNULLVAL(b, val) (RHMAP__FIT1(b), b[-1] = (val))
+#define RHMAP_CLEAR(b) ((b) ? (memset(RHMAP__HDR(b)->keys, 0, RHMAP_CAP(b) * sizeof(uint32_t)), RHMAP__HDR(b)->len = 0) : 0)
+#define RHMAP_FREE(b) ((b) ? (rhmap__free(RHMAP__HDR(b)), (b) = NULL) : 0)
+#define RHMAP_FIT(b, n) ((!(n) || ((b) && (size_t)(n) * 2 <= RHMAP_MAX(b))) ? 0 : RHMAP__GROW(b, n))
+#define RHMAP_TRYFIT(b, n) (RHMAP_FIT((b), (n)), (!(n) || ((b) && (size_t)(n) * 2 <= RHMAP_MAX(b))))
+
+#define RHMAP_SET(b, key, val) RHMAP_SET_FULL(b, key, NULL, val)
+#define RHMAP_GET(b, key)      RHMAP_GET_FULL(b, key, NULL)
+#define RHMAP_HAS(b, key)      RHMAP_HAS_FULL(b, key, NULL)
+#define RHMAP_DEL(b, key)      RHMAP_DEL_FULL(b, key, NULL)
+#define RHMAP_PTR(b, key)      RHMAP_PTR_FULL(b, key, NULL)
+#define RHMAP_IDX(b, key)      RHMAP_IDX_FULL(b, key, NULL)
+
+#ifdef __GNUC__
+#define RHMAP__UNUSED __attribute__((__unused__))
+#else
+#define RHMAP__UNUSED
+#endif
+
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable:4505) //unreferenced local function has been removed
+#endif
+
+#define RHMAP_SET_FULL(b, key, str, val) (RHMAP__FIT1(b), b[rhmap__idx(RHMAP__HDR(b), (key), (str), 1, 0)] = (val))
+#define RHMAP_GET_FULL(b, key, str) (RHMAP__FIT1(b), b[rhmap__idx(RHMAP__HDR(b), (key), (str), 0, 0)])
+#define RHMAP_HAS_FULL(b, key, str) ((b) ? rhmap__idx(RHMAP__HDR(b), (key), (str), 0, 0) != -1 : 0)
+#define RHMAP_DEL_FULL(b, key, str) ((b) ? rhmap__idx(RHMAP__HDR(b), (key), (str), 0, sizeof(*(b))) != -1 : 0)
+#define RHMAP_PTR_FULL(b, key, str) (RHMAP__FIT1(b), &b[rhmap__idx(RHMAP__HDR(b), (key), (str), 1, 0)])
+#define RHMAP_IDX_FULL(b, key, str) ((b) ? rhmap__idx(RHMAP__HDR(b), (key), (str), 0, 0) : -1)
+
+#define RHMAP_SET_STR(b, string_key, val) RHMAP_SET_FULL(b, rhmap_hash_string(string_key), string_key, val)
+#define RHMAP_GET_STR(b, string_key)      RHMAP_GET_FULL(b, rhmap_hash_string(string_key), string_key)
+#define RHMAP_HAS_STR(b, string_key)      RHMAP_HAS_FULL(b, rhmap_hash_string(string_key), string_key)
+#define RHMAP_DEL_STR(b, string_key)      RHMAP_DEL_FULL(b, rhmap_hash_string(string_key), string_key)
+#define RHMAP_PTR_STR(b, string_key)      RHMAP_PTR_FULL(b, rhmap_hash_string(string_key), string_key)
+#define RHMAP_IDX_STR(b, string_key)      RHMAP_IDX_FULL(b, rhmap_hash_string(string_key), string_key)
+
+RHMAP__UNUSED static uint32_t rhmap_hash_string(const char* str)
+{
+   unsigned char c;
+   uint32_t hash = (uint32_t)0x811c9dc5;
+   while ((c = (unsigned char)*(str++)) != '\0')
+      hash = ((hash * (uint32_t)0x01000193) ^ (uint32_t)c);
+   return (hash ? hash : 1);
+}
+
+struct rhmap__hdr { size_t len, maxlen; uint32_t *keys; char** key_strs; };
+#define RHMAP__HDR(b) (((struct rhmap__hdr *)&(b)[-1])-1)
+#define RHMAP__GROW(b, n) (*(void**)(&(b)) = rhmap__grow(RHMAP__HDR(b), (void*)(b), sizeof(*(b)), (size_t)(n)))
+#define RHMAP__FIT1(b) ((b) && RHMAP_LEN(b) * 2 <= RHMAP_MAX(b) ? 0 : RHMAP__GROW(b, 0))
+
+RHMAP__UNUSED static void* rhmap__grow(struct rhmap__hdr *old_hdr, void* old_ptr, size_t elem_size, size_t reserve)
+{
+   struct rhmap__hdr *new_hdr;
+   char *new_vals;
+   size_t new_max = (old_ptr ? old_hdr->maxlen * 2 + 1 : 15);
+   while (new_max && new_max / 2 <= reserve)
+      if (!(new_max = new_max * 2 + 1))
+         return old_ptr; /* overflow */
+
+   new_hdr = (struct rhmap__hdr *)malloc(sizeof(struct rhmap__hdr) + (new_max + 2) * elem_size);
+   if (!new_hdr)
+      return old_ptr; /* out of memory */
+
+   new_hdr->maxlen = new_max;
+   new_hdr->keys = (uint32_t *)calloc(new_max + 1, sizeof(uint32_t));
+   if (!new_hdr->keys)
+   {
+      /* out of memory */
+      free(new_hdr);
+      return old_ptr;
+   }
+   new_hdr->key_strs = (char**)calloc(new_max + 1, sizeof(char*));
+   if (!new_hdr->key_strs)
+   {
+      /* out of memory */
+      free(new_hdr->keys);
+      free(new_hdr);
+      return old_ptr;
+   }
+
+   new_vals = ((char*)(new_hdr + 1)) + elem_size;
+   if (old_ptr)
+   {
+      size_t i;
+      char* old_vals = ((char*)(old_hdr + 1)) + elem_size;
+      for (i = 0; i <= old_hdr->maxlen; i++)
+      {
+         uint32_t key, j;
+         if (!old_hdr->keys[i])
+            continue;
+         for (key = old_hdr->keys[i], j = key;; j++)
+         {
+            if (!new_hdr->keys[j &= new_hdr->maxlen])
+            {
+               new_hdr->keys[j] = key;
+               new_hdr->key_strs[j] = old_hdr->key_strs[i];
+               memcpy(new_vals + j * elem_size, old_vals + i * elem_size, elem_size);
+               break;
+            }
+         }
+      }
+      memcpy(new_vals - elem_size, old_vals - elem_size, elem_size);
+      new_hdr->len = old_hdr->len;
+      free(old_hdr->keys);
+      free(old_hdr->key_strs);
+      free(old_hdr);
+   }
+   else
+   {
+      memset(new_vals - elem_size, 0, elem_size);
+      new_hdr->len = 0;
+   }
+   return new_vals;
+}
+
+RHMAP__UNUSED static ptrdiff_t rhmap__idx(struct rhmap__hdr* hdr, uint32_t key, const char * str, int add, size_t del)
+{
+   uint32_t i;
+
+   if (!key)
+      return (ptrdiff_t)-1;
+
+   for (i = key;; i++)
+   {
+      if (hdr->keys[i &= hdr->maxlen] == key && (!hdr->key_strs[i] || !str || !strcmp(hdr->key_strs[i], str)))
+      {
+         if (del)
+         {
+            hdr->len--;
+            hdr->keys[i] = 0;
+            free(hdr->key_strs[i]);
+            hdr->key_strs[i] = NULL;
+            while ((key = hdr->keys[i = (i + 1) & hdr->maxlen]) != 0)
+            {
+               if ((key = (uint32_t)rhmap__idx(hdr, key, str, 1, 0)) == i) continue;
+               hdr->len--;
+               hdr->keys[i] = 0;
+               free(hdr->key_strs[i]);
+               hdr->key_strs[i] = NULL;
+               memcpy(((char*)(hdr + 1)) + (key + 1) * del,
+                     ((char*)(hdr + 1)) + (i + 1) * del, del);
+            }
+         }
+         return (ptrdiff_t)i;
+      }
+      if (!hdr->keys[i])
+      {
+         if (add) { hdr->len++; hdr->keys[i] = key; if (str) hdr->key_strs[i] = strdup(str); return (ptrdiff_t)i; }
+         return (ptrdiff_t)-1;
+      }
+   }
+}
+
+RHMAP__UNUSED static void rhmap__free(struct rhmap__hdr* hdr)
+{
+   size_t i;
+   for (i=0;i<hdr->maxlen+1;i++)
+   {
+      free(hdr->key_strs[i]);
+   }
+   free(hdr->key_strs);
+   free(hdr->keys);
+   free(hdr);
+}
+
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/audio/audio_resampler.h b/ThirdParty/RetroArch/libretro-common/include/audio/audio_resampler.h
new file mode 100644
index 000000000..605b6512f
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/audio/audio_resampler.h
@@ -0,0 +1,198 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (audio_resampler.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_AUDIO_RESAMPLER_DRIVER_H
+#define __LIBRETRO_SDK_AUDIO_RESAMPLER_DRIVER_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include <boolean.h>
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+#define RESAMPLER_SIMD_SSE      (1 << 0)
+#define RESAMPLER_SIMD_SSE2     (1 << 1)
+#define RESAMPLER_SIMD_VMX      (1 << 2)
+#define RESAMPLER_SIMD_VMX128   (1 << 3)
+#define RESAMPLER_SIMD_AVX      (1 << 4)
+#define RESAMPLER_SIMD_NEON     (1 << 5)
+#define RESAMPLER_SIMD_SSE3     (1 << 6)
+#define RESAMPLER_SIMD_SSSE3    (1 << 7)
+#define RESAMPLER_SIMD_MMX      (1 << 8)
+#define RESAMPLER_SIMD_MMXEXT   (1 << 9)
+#define RESAMPLER_SIMD_SSE4     (1 << 10)
+#define RESAMPLER_SIMD_SSE42    (1 << 11)
+#define RESAMPLER_SIMD_AVX2     (1 << 12)
+#define RESAMPLER_SIMD_VFPU     (1 << 13)
+#define RESAMPLER_SIMD_PS       (1 << 14)
+
+enum resampler_quality
+{
+   RESAMPLER_QUALITY_DONTCARE = 0,
+   RESAMPLER_QUALITY_LOWEST,
+   RESAMPLER_QUALITY_LOWER,
+   RESAMPLER_QUALITY_NORMAL,
+   RESAMPLER_QUALITY_HIGHER,
+   RESAMPLER_QUALITY_HIGHEST
+};
+
+/* A bit-mask of all supported SIMD instruction sets.
+ * Allows an implementation to pick different
+ * resampler_implementation structs.
+ */
+typedef unsigned resampler_simd_mask_t;
+
+#define RESAMPLER_API_VERSION 1
+
+struct resampler_data
+{
+   const float *data_in;
+   float *data_out;
+
+   size_t input_frames;
+   size_t output_frames;
+
+   double ratio;
+};
+
+/* Returns true if config key was found. Otherwise,
+ * returns false, and sets value to default value.
+ */
+typedef int (*resampler_config_get_float_t)(void *userdata,
+      const char *key, float *value, float default_value);
+
+typedef int (*resampler_config_get_int_t)(void *userdata,
+      const char *key, int *value, int default_value);
+
+/* Allocates an array with values. free() with resampler_config_free_t. */
+typedef int (*resampler_config_get_float_array_t)(void *userdata,
+      const char *key, float **values, unsigned *out_num_values,
+      const float *default_values, unsigned num_default_values);
+
+typedef int (*resampler_config_get_int_array_t)(void *userdata,
+      const char *key, int **values, unsigned *out_num_values,
+      const int *default_values, unsigned num_default_values);
+
+typedef int (*resampler_config_get_string_t)(void *userdata,
+      const char *key, char **output, const char *default_output);
+
+/* Calls free() in host runtime. Sometimes needed on Windows.
+ * free() on NULL is fine. */
+typedef void (*resampler_config_free_t)(void *ptr);
+
+struct resampler_config
+{
+   resampler_config_get_float_t get_float;
+   resampler_config_get_int_t get_int;
+
+   resampler_config_get_float_array_t get_float_array;
+   resampler_config_get_int_array_t get_int_array;
+
+   resampler_config_get_string_t get_string;
+   /* Avoid problems where resampler plug and host are
+    * linked against different C runtimes. */
+   resampler_config_free_t free;
+};
+
+/* Bandwidth factor. Will be < 1.0 for downsampling, > 1.0 for upsampling.
+ * Corresponds to expected resampling ratio. */
+typedef void *(*resampler_init_t)(const struct resampler_config *config,
+      double bandwidth_mod, enum resampler_quality quality,
+      size_t channels, resampler_simd_mask_t mask);
+
+/* Frees the handle. */
+typedef void (*resampler_free_t)(void *data);
+
+/* Processes input data. */
+typedef void (*resampler_process_t)(void *_data, struct resampler_data *data);
+
+typedef size_t (*resampler_latency_t)(void *_data);
+
+typedef struct retro_resampler
+{
+   resampler_init_t     init;
+   resampler_process_t  process;
+   resampler_free_t     free;
+   resampler_latency_t  latency;
+
+   /* Must be RESAMPLER_API_VERSION */
+   unsigned api_version;
+
+   /* Human readable identifier of implementation. */
+   const char *ident;
+
+   /* Computer-friendly short version of ident.
+    * Lower case, no spaces and special characters, etc. */
+   const char *short_ident;
+} retro_resampler_t;
+
+typedef struct audio_frame_float
+{
+   float l;
+   float r;
+} audio_frame_float_t;
+
+extern retro_resampler_t sinc_resampler;
+#ifdef HAVE_CC_RESAMPLER
+extern retro_resampler_t CC_resampler;
+#endif
+extern retro_resampler_t nearest_resampler;
+
+/**
+ * audio_resampler_driver_find_handle:
+ * @index              : index of driver to get handle to.
+ *
+ * Returns: handle to audio resampler driver at index. Can be NULL
+ * if nothing found.
+ **/
+const void *audio_resampler_driver_find_handle(int index);
+
+/**
+ * audio_resampler_driver_find_ident:
+ * @index              : index of driver to get handle to.
+ *
+ * Returns: Human-readable identifier of audio resampler driver at index.
+ * Can be NULL if nothing found.
+ **/
+const char *audio_resampler_driver_find_ident(int index);
+
+/**
+ * retro_resampler_realloc:
+ * @re                         : Resampler handle
+ * @backend                    : Resampler backend that is about to be set.
+ * @ident                      : Identifier name for resampler we want.
+ * @bw_ratio                   : Bandwidth ratio.
+ *
+ * Reallocates resampler. Will free previous handle before
+ * allocating a new one. If ident is NULL, first resampler will be used.
+ *
+ * Returns: true (1) if successful, otherwise false (0).
+ **/
+bool retro_resampler_realloc(void **re, const retro_resampler_t **backend,
+      const char *ident, enum resampler_quality quality, size_t channels,
+      double bw_ratio);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/audio/conversion/s16_to_float.h b/ThirdParty/RetroArch/libretro-common/include/audio/conversion/s16_to_float.h
new file mode 100644
index 000000000..188296e07
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/audio/conversion/s16_to_float.h
@@ -0,0 +1,55 @@
+/* Copyright  (C) 2010-2021 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (s16_to_float.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef __LIBRETRO_SDK_CONVERSION_S16_TO_FLOAT_H__
+#define __LIBRETRO_SDK_CONVERSION_S16_TO_FLOAT_H__
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+/**
+ * convert_s16_to_float:
+ * @out               : output buffer
+ * @in                : input buffer
+ * @samples           : size of samples to be converted
+ * @gain              : gain applied (.e.g. audio volume)
+ *
+ * Converts from signed integer 16-bit
+ * to floating point.
+ **/
+void convert_s16_to_float(float *out,
+      const int16_t *in, size_t samples, float gain);
+
+/**
+ * convert_s16_to_float_init_simd:
+ *
+ * Sets up function pointers for conversion
+ * functions based on CPU features.
+ **/
+void convert_s16_to_float_init_simd(void);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/audio/conversion/s32_to_float.h b/ThirdParty/RetroArch/libretro-common/include/audio/conversion/s32_to_float.h
new file mode 100644
index 000000000..6b6e46701
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/audio/conversion/s32_to_float.h
@@ -0,0 +1,55 @@
+/* Copyright  (C) 2010-2021 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (s32_to_float.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef __LIBRETRO_SDK_CONVERSION_S32_TO_FLOAT_H__
+#define __LIBRETRO_SDK_CONVERSION_S32_TO_FLOAT_H__
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+/**
+ * convert_s32_to_float:
+ * @out               : output buffer
+ * @in                : input buffer
+ * @samples           : size of samples to be converted
+ * @gain              : gain applied (.e.g. audio volume)
+ *
+ * Converts from signed integer 16-bit
+ * to floating point.
+ **/
+void convert_s32_to_float(float *out,
+      const int32_t *in, size_t samples, float gain);
+
+/**
+ * convert_s32_to_float_init_simd:
+ *
+ * Sets up function pointers for conversion
+ * functions based on CPU features.
+ **/
+void convert_s32_to_float_init_simd(void);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/boolean.h b/ThirdParty/RetroArch/libretro-common/include/boolean.h
new file mode 100644
index 000000000..9d0d7c129
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/boolean.h
@@ -0,0 +1,39 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (boolean.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_BOOLEAN_H
+#define __LIBRETRO_SDK_BOOLEAN_H
+
+#ifndef __cplusplus
+
+#if defined(_MSC_VER) && _MSC_VER < 1800 && !defined(SN_TARGET_PS3)
+/* Hack applied for MSVC when compiling in C89 mode as it isn't C99 compliant. */
+#define bool unsigned char
+#define true 1
+#define false 0
+#else
+#include <stdbool.h>
+#endif
+
+#endif
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/compat/fopen_utf8.h b/ThirdParty/RetroArch/libretro-common/include/compat/fopen_utf8.h
new file mode 100644
index 000000000..97d4404e2
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/compat/fopen_utf8.h
@@ -0,0 +1,34 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (fopen_utf8.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_COMPAT_FOPEN_UTF8_H
+#define __LIBRETRO_SDK_COMPAT_FOPEN_UTF8_H
+
+#ifdef _WIN32
+/* Defined to error rather than fopen_utf8, to make it clear to everyone reading the code that not worrying about utf16 is fine */
+/* TODO: enable */
+/* #define fopen (use fopen_utf8 instead) */
+void *fopen_utf8(const char * filename, const char * mode);
+#else
+#define fopen_utf8 fopen
+#endif
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/compat/msvc.h b/ThirdParty/RetroArch/libretro-common/include/compat/msvc.h
new file mode 100644
index 000000000..a4c93a59a
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/compat/msvc.h
@@ -0,0 +1,126 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (msvc.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_COMPAT_MSVC_H
+#define __LIBRETRO_SDK_COMPAT_MSVC_H
+
+#ifdef _MSC_VER
+
+#ifdef __cplusplus
+extern "C"  {
+#endif
+
+/* Pre-MSVC 2015 compilers don't implement snprintf, vsnprintf in a cross-platform manner. */
+#if _MSC_VER < 1900
+   #include <stdio.h>
+   #include <stdarg.h>
+   #include <stdlib.h>
+
+   #ifndef snprintf
+      #define snprintf c99_snprintf_retro__
+   #endif
+   int c99_snprintf_retro__(char *outBuf, size_t size, const char *format, ...);
+
+   #ifndef vsnprintf
+      #define vsnprintf c99_vsnprintf_retro__
+   #endif
+   int c99_vsnprintf_retro__(char *outBuf, size_t size, const char *format, va_list ap);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#undef UNICODE /* Do not bother with UNICODE at this time. */
+#include <direct.h>
+#include <stddef.h>
+
+#define _USE_MATH_DEFINES
+#include <math.h>
+
+/* Python headers defines ssize_t and sets HAVE_SSIZE_T.
+ * Cannot duplicate these efforts.
+ */
+#ifndef HAVE_SSIZE_T
+#if defined(_WIN64)
+typedef __int64 ssize_t;
+#elif defined(_WIN32)
+typedef int ssize_t;
+#endif
+#endif
+
+#define mkdir(dirname, unused) _mkdir(dirname)
+#define strtoull _strtoui64
+#undef strcasecmp
+#define strcasecmp _stricmp
+#undef strncasecmp
+#define strncasecmp _strnicmp
+
+/* Disable some of the annoying warnings. */
+#pragma warning(disable : 4800)
+#pragma warning(disable : 4805)
+#pragma warning(disable : 4244)
+#pragma warning(disable : 4305)
+#pragma warning(disable : 4146)
+#pragma warning(disable : 4267)
+#pragma warning(disable : 4723)
+#pragma warning(disable : 4996)
+
+/* roundf and va_copy is available since MSVC 2013 */
+#if _MSC_VER < 1800
+#define roundf(in) (in >= 0.0f ? floorf(in + 0.5f) : ceilf(in - 0.5f))
+#define va_copy(x, y) ((x) = (y))
+#endif
+
+#if _MSC_VER <= 1310
+   #ifndef __cplusplus
+      /* VC6 math.h doesn't define some functions when in C mode.
+       * Trying to define a prototype gives "undefined reference".
+       * But providing an implementation then gives "function already has body".
+       * So the equivalent of the implementations from math.h are used as
+       * defines here instead, and it seems to work.
+       */
+      #define cosf(x) ((float)cos((double)x))
+      #define powf(x, y) ((float)pow((double)x, (double)y))
+      #define sinf(x) ((float)sin((double)x))
+      #define ceilf(x) ((float)ceil((double)x))
+      #define floorf(x) ((float)floor((double)x))
+      #define sqrtf(x) ((float)sqrt((double)x))
+      #define fabsf(x)    ((float)fabs((double)(x)))
+   #endif
+
+   #ifndef _strtoui64
+      #define _strtoui64(x, y, z) (_atoi64(x))
+   #endif
+
+#endif
+
+#ifndef PATH_MAX
+#define PATH_MAX _MAX_PATH
+#endif
+
+#ifndef SIZE_MAX
+#define SIZE_MAX _UI32_MAX
+#endif
+
+#endif
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/compat/posix_string.h b/ThirdParty/RetroArch/libretro-common/include/compat/posix_string.h
new file mode 100644
index 000000000..47964b2a0
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/compat/posix_string.h
@@ -0,0 +1,60 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (posix_string.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_COMPAT_POSIX_STRING_H
+#define __LIBRETRO_SDK_COMPAT_POSIX_STRING_H
+
+#include <retro_common_api.h>
+
+#ifdef _MSC_VER
+#include <compat/msvc.h>
+#endif
+
+RETRO_BEGIN_DECLS
+
+#ifdef _WIN32
+#undef strtok_r
+#define strtok_r(str, delim, saveptr) retro_strtok_r__(str, delim, saveptr)
+
+char *strtok_r(char *str, const char *delim, char **saveptr);
+#endif
+
+#ifdef _MSC_VER
+#undef strcasecmp
+#undef strdup
+#define strcasecmp(a, b) retro_strcasecmp__(a, b)
+#define strdup(orig)     retro_strdup__(orig)
+int strcasecmp(const char *a, const char *b);
+char *strdup(const char *orig);
+
+/* isblank is available since MSVC 2013 */
+#if _MSC_VER < 1800
+#undef isblank
+#define isblank(c)       retro_isblank__(c)
+int isblank(int c);
+#endif
+
+#endif
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/compat/strcasestr.h b/ThirdParty/RetroArch/libretro-common/include/compat/strcasestr.h
new file mode 100644
index 000000000..227e253e7
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/compat/strcasestr.h
@@ -0,0 +1,48 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (strcasestr.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_COMPAT_STRCASESTR_H
+#define __LIBRETRO_SDK_COMPAT_STRCASESTR_H
+
+#include <string.h>
+
+#if defined(RARCH_INTERNAL) && defined(HAVE_CONFIG_H)
+#include "../../../config.h"
+#endif
+
+#ifndef HAVE_STRCASESTR
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+/* Avoid possible naming collisions during link
+ * since we prefer to use the actual name. */
+#define strcasestr(haystack, needle) strcasestr_retro__(haystack, needle)
+
+char *strcasestr(const char *haystack, const char *needle);
+
+RETRO_END_DECLS
+
+#endif
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/compat/strl.h b/ThirdParty/RetroArch/libretro-common/include/compat/strl.h
new file mode 100644
index 000000000..5e7a892fc
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/compat/strl.h
@@ -0,0 +1,59 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (strl.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_COMPAT_STRL_H
+#define __LIBRETRO_SDK_COMPAT_STRL_H
+
+#include <string.h>
+#include <stddef.h>
+
+#if defined(RARCH_INTERNAL) && defined(HAVE_CONFIG_H)
+#include "../../../config.h"
+#endif
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+#ifdef __MACH__
+#ifndef HAVE_STRL
+#define HAVE_STRL
+#endif
+#endif
+
+#ifndef HAVE_STRL
+/* Avoid possible naming collisions during link since
+ * we prefer to use the actual name. */
+#define strlcpy(dst, src, size) strlcpy_retro__(dst, src, size)
+
+#define strlcat(dst, src, size) strlcat_retro__(dst, src, size)
+
+size_t strlcpy(char *dest, const char *source, size_t size);
+size_t strlcat(char *dest, const char *source, size_t size);
+
+#endif
+
+char *strldup(const char *s, size_t n);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/encodings/utf.h b/ThirdParty/RetroArch/libretro-common/include/encodings/utf.h
new file mode 100644
index 000000000..bea4e145d
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/encodings/utf.h
@@ -0,0 +1,67 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (utf.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_ENCODINGS_UTF_H
+#define _LIBRETRO_ENCODINGS_UTF_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include <boolean.h>
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+enum CodePage
+{
+   CODEPAGE_LOCAL = 0, /* CP_ACP */
+   CODEPAGE_UTF8  = 65001 /* CP_UTF8 */
+};
+
+size_t utf8_conv_utf32(uint32_t *out, size_t out_chars,
+      const char *in, size_t in_size);
+
+bool utf16_conv_utf8(uint8_t *out, size_t *out_chars,
+      const uint16_t *in, size_t in_size);
+
+size_t utf8len(const char *string);
+
+size_t utf8cpy(char *d, size_t d_len, const char *s, size_t chars);
+
+const char *utf8skip(const char *str, size_t chars);
+
+uint32_t utf8_walk(const char **string);
+
+bool utf16_to_char_string(const uint16_t *in, char *s, size_t len);
+
+char* utf8_to_local_string_alloc(const char *str);
+
+char* local_to_utf8_string_alloc(const char *str);
+
+wchar_t* utf8_to_utf16_string_alloc(const char *str);
+
+char* utf16_to_utf8_string_alloc(const wchar_t *str);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/features/features_cpu.h b/ThirdParty/RetroArch/libretro-common/include/features/features_cpu.h
new file mode 100644
index 000000000..7ce92091c
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/features/features_cpu.h
@@ -0,0 +1,75 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (features_cpu.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_SDK_CPU_INFO_H
+#define _LIBRETRO_SDK_CPU_INFO_H
+
+#include <retro_common_api.h>
+
+#include <stdint.h>
+
+#include <libretro.h>
+
+RETRO_BEGIN_DECLS
+
+/**
+ * cpu_features_get_perf_counter:
+ *
+ * Gets performance counter.
+ *
+ * Returns: performance counter.
+ **/
+retro_perf_tick_t cpu_features_get_perf_counter(void);
+
+/**
+ * cpu_features_get_time_usec:
+ *
+ * Gets time in microseconds, from an undefined epoch.
+ * The epoch may change between computers or across reboots.
+ *
+ * Returns: time in microseconds
+ **/
+retro_time_t cpu_features_get_time_usec(void);
+
+/**
+ * cpu_features_get:
+ *
+ * Gets CPU features.
+ *
+ * Returns: bitmask of all CPU features available.
+ **/
+uint64_t cpu_features_get(void);
+
+/**
+ * cpu_features_get_core_amount:
+ *
+ * Gets the amount of available CPU cores.
+ *
+ * Returns: amount of CPU cores available.
+ **/
+unsigned cpu_features_get_core_amount(void);
+
+void cpu_features_get_model_name(char *name, int len);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/file/config_file.h b/ThirdParty/RetroArch/libretro-common/include/file/config_file.h
new file mode 100644
index 000000000..87e4b32b4
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/file/config_file.h
@@ -0,0 +1,225 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (config_file.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_CONFIG_FILE_H
+#define __LIBRETRO_SDK_CONFIG_FILE_H
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stddef.h>
+
+#include <boolean.h>
+
+#define CONFIG_GET_BOOL_BASE(conf, base, var, key) do { \
+   bool tmp = false; \
+   if (config_get_bool(conf, key, &tmp)) \
+      base->var = tmp; \
+} while(0)
+
+#define CONFIG_GET_INT_BASE(conf, base, var, key) do { \
+   int tmp = 0; \
+   if (config_get_int(conf, key, &tmp)) \
+      base->var = tmp; \
+} while(0)
+
+#define CONFIG_GET_FLOAT_BASE(conf, base, var, key) do { \
+   float tmp = 0.0f; \
+   if (config_get_float(conf, key, &tmp)) \
+      base->var = tmp; \
+} while(0)
+
+struct config_file
+{
+   char *path;
+   char *reference;
+   struct config_entry_list **entries_map;
+   struct config_entry_list *entries;
+   struct config_entry_list *tail;
+   struct config_entry_list *last;
+   struct config_include_list *includes;
+   unsigned include_depth;
+   bool guaranteed_no_duplicates;
+   bool modified;
+};
+
+typedef struct config_file config_file_t;
+
+struct config_file_cb
+{
+   void (*config_file_new_entry_cb)(char*, char*);
+};
+
+typedef struct config_file_cb config_file_cb_t ;
+
+/* Config file format
+ * - # are treated as comments. Rest of the line is ignored.
+ * - Format is: key = value. There can be as many spaces as you like in-between.
+ * - Value can be wrapped inside "" for multiword strings. (foo = "hai u")
+ * - #include includes a config file in-place.
+ *
+ * Path is relative to where config file was loaded unless an absolute path is chosen.
+ * Key/value pairs from an #include are read-only, and cannot be modified.
+ */
+
+/* Loads a config file. Returns NULL if file doesn't exist.
+ * NULL path will create an empty config file. */
+config_file_t *config_file_new(const char *path);
+
+config_file_t *config_file_new_alloc(void);
+
+void config_file_initialize(struct config_file *conf);
+
+/* Loads a config file. Returns NULL if file doesn't exist.
+ * NULL path will create an empty config file.
+ * Includes cb callbacks to run custom code during config file processing.*/
+config_file_t *config_file_new_with_callback(const char *path, config_file_cb_t *cb);
+
+/* Load a config file from a string.
+ * > WARNING: This will modify 'from_string'.
+ *   Pass a copy of source string if original
+ *   contents must be preserved */
+config_file_t *config_file_new_from_string(char *from_string,
+      const char *path);
+
+config_file_t *config_file_new_from_path_to_string(const char *path);
+
+/* Frees config file. */
+void config_file_free(config_file_t *conf);
+
+void config_file_set_reference_path(config_file_t *conf, char *path);
+
+bool config_file_deinitialize(config_file_t *conf);
+
+/* Loads a new config, and appends its data to conf.
+ * The key-value pairs of the new config file takes priority over the old. */
+bool config_append_file(config_file_t *conf, const char *path);
+
+/* All extract functions return true when value is valid and exists.
+ * Returns false otherwise. */
+
+bool config_entry_exists(config_file_t *conf, const char *entry);
+
+struct config_entry_list
+{
+   char *key;
+   char *value;
+   struct config_entry_list *next;
+   /* If we got this from an #include,
+    * do not allow overwrite. */
+   bool readonly;
+};
+
+
+struct config_file_entry
+{
+   const char *key;
+   const char *value;
+   /* Used intentionally. Opaque here. */
+   const struct config_entry_list *next;
+};
+
+struct config_entry_list *config_get_entry(
+      const config_file_t *conf, const char *key);
+
+bool config_get_entry_list_head(config_file_t *conf, struct config_file_entry *entry);
+bool config_get_entry_list_next(struct config_file_entry *entry);
+
+/* Extracts a double from config file. */
+bool config_get_double(config_file_t *conf, const char *entry, double *in);
+
+/* Extracts a float from config file. */
+bool config_get_float(config_file_t *conf, const char *entry, float *in);
+
+/* Extracts an int from config file. */
+bool config_get_int(config_file_t *conf, const char *entry, int *in);
+
+/* Extracts an uint from config file. */
+bool config_get_uint(config_file_t *conf, const char *entry, unsigned *in);
+
+/* Extracts an size_t from config file. */
+bool config_get_size_t(config_file_t *conf, const char *key, size_t *in);
+
+#if defined(__STDC_VERSION__) && __STDC_VERSION__>=199901L
+/* Extracts an uint64 from config file. */
+bool config_get_uint64(config_file_t *conf, const char *entry, uint64_t *in);
+#endif
+
+/* Extracts an unsigned int from config file treating input as hex. */
+bool config_get_hex(config_file_t *conf, const char *entry, unsigned *in);
+
+/* Extracts a single char. If value consists of several chars,
+ * this is an error. */
+bool config_get_char(config_file_t *conf, const char *entry, char *in);
+
+/* Extracts an allocated string in *in. This must be free()-d if
+ * this function succeeds. */
+bool config_get_string(config_file_t *conf, const char *entry, char **in);
+
+/* Extracts a string to a preallocated buffer. Avoid memory allocation. */
+bool config_get_array(config_file_t *conf, const char *entry, char *s, size_t len);
+
+/* Extracts a string to a preallocated buffer. Avoid memory allocation.
+ * Recognized magic like ~/. Similar to config_get_array() otherwise. */
+bool config_get_path(config_file_t *conf, const char *entry, char *s, size_t len);
+
+/* Extracts a string to a preallocated buffer. Avoid memory allocation. */
+bool config_get_config_path(config_file_t *conf, char *s, size_t len);
+
+/* Extracts a boolean from config.
+ * Valid boolean true are "true" and "1". Valid false are "false" and "0".
+ * Other values will be treated as an error. */
+bool config_get_bool(config_file_t *conf, const char *entry, bool *in);
+
+/* Setters. Similar to the getters.
+ * Will not write to entry if the entry was obtained from an #include. */
+void config_set_double(config_file_t *conf, const char *entry, double value);
+void config_set_float(config_file_t *conf, const char *entry, float value);
+void config_set_int(config_file_t *conf, const char *entry, int val);
+void config_set_hex(config_file_t *conf, const char *entry, unsigned val);
+void config_set_uint64(config_file_t *conf, const char *entry, uint64_t val);
+void config_set_char(config_file_t *conf, const char *entry, char val);
+void config_set_string(config_file_t *conf, const char *entry, const char *val);
+void config_unset(config_file_t *conf, const char *key);
+void config_set_path(config_file_t *conf, const char *entry, const char *val);
+void config_set_bool(config_file_t *conf, const char *entry, bool val);
+void config_set_uint(config_file_t *conf, const char *key, unsigned int val);
+
+/* Write the current config to a file. */
+bool config_file_write(config_file_t *conf, const char *path, bool val);
+
+/* Dump the current config to an already opened file.
+ * Does not close the file. */
+void config_file_dump(config_file_t *conf, FILE *file, bool val);
+
+#ifdef ORBIS
+void config_file_dump_orbis(config_file_t *conf, int fd);
+#endif
+
+bool config_file_exists(const char *path);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/file/config_file_userdata.h b/ThirdParty/RetroArch/libretro-common/include/file/config_file_userdata.h
new file mode 100644
index 000000000..0490da248
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/file/config_file_userdata.h
@@ -0,0 +1,64 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (config_file_userdata.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_SDK_CONFIG_FILE_USERDATA_H
+#define _LIBRETRO_SDK_CONFIG_FILE_USERDATA_H
+
+#include <string.h>
+
+#include <file/config_file.h>
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+struct config_file_userdata
+{
+   config_file_t *conf;
+   const char *prefix[2];
+};
+
+int config_userdata_get_float(void *userdata, const char *key_str,
+      float *value, float default_value);
+
+int config_userdata_get_int(void *userdata, const char *key_str,
+      int *value, int default_value);
+
+int config_userdata_get_hex(void *userdata, const char *key_str,
+      unsigned *value, unsigned default_value);
+
+int config_userdata_get_float_array(void *userdata, const char *key_str,
+      float **values, unsigned *out_num_values,
+      const float *default_values, unsigned num_default_values);
+
+int config_userdata_get_int_array(void *userdata, const char *key_str,
+      int **values, unsigned *out_num_values,
+      const int *default_values, unsigned num_default_values);
+
+int config_userdata_get_string(void *userdata, const char *key_str,
+      char **output, const char *default_output);
+
+void config_userdata_free(void *ptr);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/file/file_path.h b/ThirdParty/RetroArch/libretro-common/include/file/file_path.h
new file mode 100644
index 000000000..452763fed
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/file/file_path.h
@@ -0,0 +1,538 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (file_path.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_FILE_PATH_H
+#define __LIBRETRO_SDK_FILE_PATH_H
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <sys/types.h>
+
+#include <libretro.h>
+#include <retro_common_api.h>
+
+#include <boolean.h>
+
+RETRO_BEGIN_DECLS
+
+#define PATH_REQUIRED_VFS_VERSION 3
+
+void path_vfs_init(const struct retro_vfs_interface_info* vfs_info);
+
+/* Order in this enum is equivalent to negative sort order in filelist
+ *  (i.e. DIRECTORY is on top of PLAIN_FILE) */
+enum
+{
+   RARCH_FILETYPE_UNSET,
+   RARCH_PLAIN_FILE,
+   RARCH_COMPRESSED_FILE_IN_ARCHIVE,
+   RARCH_COMPRESSED_ARCHIVE,
+   RARCH_DIRECTORY,
+   RARCH_FILE_UNSUPPORTED
+};
+
+/**
+ * path_is_compressed_file:
+ * @path               : path
+ *
+ * Checks if path is a compressed file.
+ *
+ * Returns: true (1) if path is a compressed file, otherwise false (0).
+ **/
+bool path_is_compressed_file(const char *path);
+
+/**
+ * path_contains_compressed_file:
+ * @path               : path
+ *
+ * Checks if path contains a compressed file.
+ *
+ * Currently we only check for hash symbol (#) inside the pathname.
+ * If path is ever expanded to a general URI, we should check for that here.
+ *
+ * Example:  Somewhere in the path there might be a compressed file
+ * E.g.: /path/to/file.7z#mygame.img
+ *
+ * Returns: true (1) if path contains compressed file, otherwise false (0).
+ **/
+#define path_contains_compressed_file(path) (path_get_archive_delim((path)) != NULL)
+
+/**
+ * path_get_archive_delim:
+ * @path               : path
+ *
+ * Gets delimiter of an archive file. Only the first '#'
+ * after a compression extension is considered.
+ *
+ * Returns: pointer to the delimiter in the path if it contains
+ * a compressed file, otherwise NULL.
+ */
+const char *path_get_archive_delim(const char *path);
+
+/**
+ * path_get_extension:
+ * @path               : path
+ *
+ * Gets extension of file. Only '.'s
+ * after the last slash are considered.
+ *
+ * Returns: extension part from the path.
+ */
+const char *path_get_extension(const char *path);
+
+/**
+ * path_remove_extension:
+ * @path               : path
+ *
+ * Mutates path by removing its extension. Removes all
+ * text after and including the last '.'.
+ * Only '.'s after the last slash are considered.
+ *
+ * Returns:
+ * 1) If path has an extension, returns path with the
+ *    extension removed.
+ * 2) If there is no extension, returns NULL.
+ * 3) If path is empty or NULL, returns NULL
+ */
+char *path_remove_extension(char *path);
+
+/**
+ * path_basename:
+ * @path               : path
+ *
+ * Get basename from @path.
+ *
+ * Returns: basename from path.
+ **/
+const char *path_basename(const char *path);
+const char *path_basename_nocompression(const char *path);
+
+/**
+ * path_basedir:
+ * @path               : path
+ *
+ * Extracts base directory by mutating path.
+ * Keeps trailing '/'.
+ **/
+void path_basedir(char *path);
+
+/**
+ * path_parent_dir:
+ * @path               : path
+ *
+ * Extracts parent directory by mutating path.
+ * Assumes that path is a directory. Keeps trailing '/'.
+ * If the path was already at the root directory, returns empty string
+ **/
+void path_parent_dir(char *path);
+
+/**
+ * path_resolve_realpath:
+ * @buf                : input and output buffer for path
+ * @size               : size of buffer
+ * @resolve_symlinks   : whether to resolve symlinks or not
+ *
+ * Resolves use of ".", "..", multiple slashes etc in absolute paths.
+ *
+ * Relative paths are rebased on the current working dir.
+ *
+ * Returns: @buf if successful, NULL otherwise.
+ * Note: Not implemented on consoles
+ * Note: Symlinks are only resolved on Unix-likes
+ * Note: The current working dir might not be what you expect,
+ *       e.g. on Android it is "/"
+ *       Use of fill_pathname_resolve_relative() should be prefered
+ **/
+char *path_resolve_realpath(char *buf, size_t size, bool resolve_symlinks);
+
+/**
+ * path_relative_to:
+ * @out                : buffer to write the relative path to
+ * @path               : path to be expressed relatively
+ * @base               : relative to this
+ * @size               : size of output buffer
+ *
+ * Turns @path into a path relative to @base and writes it to @out.
+ *
+ * @base is assumed to be a base directory, i.e. a path ending with '/' or '\'.
+ * Both @path and @base are assumed to be absolute paths without "." or "..".
+ *
+ * E.g. path /a/b/e/f.cgp with base /a/b/c/d/ turns into ../../e/f.cgp
+ **/
+size_t path_relative_to(char *out, const char *path, const char *base, size_t size);
+
+/**
+ * path_is_absolute:
+ * @path               : path
+ *
+ * Checks if @path is an absolute path or a relative path.
+ *
+ * Returns: true if path is absolute, false if path is relative.
+ **/
+bool path_is_absolute(const char *path);
+
+/**
+ * fill_pathname:
+ * @out_path           : output path
+ * @in_path            : input  path
+ * @replace            : what to replace
+ * @size               : buffer size of output path
+ *
+ * FIXME: Verify
+ *
+ * Replaces filename extension with 'replace' and outputs result to out_path.
+ * The extension here is considered to be the string from the last '.'
+ * to the end.
+ *
+ * Only '.'s after the last slash are considered as extensions.
+ * If no '.' is present, in_path and replace will simply be concatenated.
+ * 'size' is buffer size of 'out_path'.
+ * E.g.: in_path = "/foo/bar/baz/boo.c", replace = ".asm" =>
+ * out_path = "/foo/bar/baz/boo.asm"
+ * E.g.: in_path = "/foo/bar/baz/boo.c", replace = ""     =>
+ * out_path = "/foo/bar/baz/boo"
+ */
+void fill_pathname(char *out_path, const char *in_path,
+      const char *replace, size_t size);
+
+/**
+ * fill_dated_filename:
+ * @out_filename       : output filename
+ * @ext                : extension of output filename
+ * @size               : buffer size of output filename
+ *
+ * Creates a 'dated' filename prefixed by 'RetroArch', and
+ * concatenates extension (@ext) to it.
+ *
+ * E.g.:
+ * out_filename = "RetroArch-{month}{day}-{Hours}{Minutes}.{@ext}"
+ **/
+size_t fill_dated_filename(char *out_filename,
+      const char *ext, size_t size);
+
+/**
+ * fill_str_dated_filename:
+ * @out_filename       : output filename
+ * @in_str             : input string
+ * @ext                : extension of output filename
+ * @size               : buffer size of output filename
+ *
+ * Creates a 'dated' filename prefixed by the string @in_str, and
+ * concatenates extension (@ext) to it.
+ *
+ * E.g.:
+ * out_filename = "RetroArch-{year}{month}{day}-{Hour}{Minute}{Second}.{@ext}"
+ **/
+void fill_str_dated_filename(char *out_filename,
+      const char *in_str, const char *ext, size_t size);
+
+/**
+ * fill_pathname_noext:
+ * @out_path           : output path
+ * @in_path            : input  path
+ * @replace            : what to replace
+ * @size               : buffer size of output path
+ *
+ * Appends a filename extension 'replace' to 'in_path', and outputs
+ * result in 'out_path'.
+ *
+ * Assumes in_path has no extension. If an extension is still
+ * present in 'in_path', it will be ignored.
+ *
+ */
+size_t fill_pathname_noext(char *out_path, const char *in_path,
+      const char *replace, size_t size);
+
+/**
+ * find_last_slash:
+ * @str : input path
+ *
+ * Gets a pointer to the last slash in the input path.
+ *
+ * Returns: a pointer to the last slash in the input path.
+ **/
+char *find_last_slash(const char *str);
+
+/**
+ * fill_pathname_dir:
+ * @in_dir             : input directory path
+ * @in_basename        : input basename to be appended to @in_dir
+ * @replace            : replacement to be appended to @in_basename
+ * @size               : size of buffer
+ *
+ * Appends basename of 'in_basename', to 'in_dir', along with 'replace'.
+ * Basename of in_basename is the string after the last '/' or '\\',
+ * i.e the filename without directories.
+ *
+ * If in_basename has no '/' or '\\', the whole 'in_basename' will be used.
+ * 'size' is buffer size of 'in_dir'.
+ *
+ * E.g..: in_dir = "/tmp/some_dir", in_basename = "/some_content/foo.c",
+ * replace = ".asm" => in_dir = "/tmp/some_dir/foo.c.asm"
+ **/
+size_t fill_pathname_dir(char *in_dir, const char *in_basename,
+      const char *replace, size_t size);
+
+/**
+ * fill_pathname_base:
+ * @out                : output path
+ * @in_path            : input path
+ * @size               : size of output path
+ *
+ * Copies basename of @in_path into @out_path.
+ **/
+size_t fill_pathname_base(char *out_path, const char *in_path, size_t size);
+
+void fill_pathname_base_noext(char *out_dir,
+      const char *in_path, size_t size);
+
+size_t fill_pathname_base_ext(char *out,
+      const char *in_path, const char *ext,
+      size_t size);
+
+/**
+ * fill_pathname_basedir:
+ * @out_dir            : output directory
+ * @in_path            : input path
+ * @size               : size of output directory
+ *
+ * Copies base directory of @in_path into @out_path.
+ * If in_path is a path without any slashes (relative current directory),
+ * @out_path will get path "./".
+ **/
+void fill_pathname_basedir(char *out_path, const char *in_path, size_t size);
+
+void fill_pathname_basedir_noext(char *out_dir,
+      const char *in_path, size_t size);
+
+/**
+ * fill_pathname_parent_dir_name:
+ * @out_dir            : output directory
+ * @in_dir             : input directory
+ * @size               : size of output directory
+ *
+ * Copies only the parent directory name of @in_dir into @out_dir.
+ * The two buffers must not overlap. Removes trailing '/'.
+ * Returns true on success, false if a slash was not found in the path.
+ **/
+bool fill_pathname_parent_dir_name(char *out_dir,
+      const char *in_dir, size_t size);
+
+/**
+ * fill_pathname_parent_dir:
+ * @out_dir            : output directory
+ * @in_dir             : input directory
+ * @size               : size of output directory
+ *
+ * Copies parent directory of @in_dir into @out_dir.
+ * Assumes @in_dir is a directory. Keeps trailing '/'.
+ * If the path was already at the root directory, @out_dir will be an empty string.
+ **/
+void fill_pathname_parent_dir(char *out_dir,
+      const char *in_dir, size_t size);
+
+/**
+ * fill_pathname_resolve_relative:
+ * @out_path           : output path
+ * @in_refpath         : input reference path
+ * @in_path            : input path
+ * @size               : size of @out_path
+ *
+ * Joins basedir of @in_refpath together with @in_path.
+ * If @in_path is an absolute path, out_path = in_path.
+ * E.g.: in_refpath = "/foo/bar/baz.a", in_path = "foobar.cg",
+ * out_path = "/foo/bar/foobar.cg".
+ **/
+void fill_pathname_resolve_relative(char *out_path, const char *in_refpath,
+      const char *in_path, size_t size);
+
+/**
+ * fill_pathname_join:
+ * @out_path           : output path
+ * @dir                : directory
+ * @path               : path
+ * @size               : size of output path
+ *
+ * Joins a directory (@dir) and path (@path) together.
+ * Makes sure not to get  two consecutive slashes
+ * between directory and path.
+ **/
+size_t fill_pathname_join(char *out_path, const char *dir,
+      const char *path, size_t size);
+
+size_t fill_pathname_join_special_ext(char *out_path,
+      const char *dir,  const char *path,
+      const char *last, const char *ext,
+      size_t size);
+
+size_t fill_pathname_join_concat_noext(char *out_path,
+      const char *dir, const char *path,
+      const char *concat,
+      size_t size);
+
+size_t fill_pathname_join_concat(char *out_path,
+      const char *dir, const char *path,
+      const char *concat,
+      size_t size);
+
+void fill_pathname_join_noext(char *out_path,
+      const char *dir, const char *path, size_t size);
+
+/**
+ * fill_pathname_join_delim:
+ * @out_path           : output path
+ * @dir                : directory
+ * @path               : path
+ * @delim              : delimiter
+ * @size               : size of output path
+ *
+ * Joins a directory (@dir) and path (@path) together
+ * using the given delimiter (@delim).
+ **/
+size_t fill_pathname_join_delim(char *out_path, const char *dir,
+      const char *path, const char delim, size_t size);
+
+size_t fill_pathname_join_delim_concat(char *out_path, const char *dir,
+      const char *path, const char delim, const char *concat,
+      size_t size);
+
+/**
+ * fill_short_pathname_representation:
+ * @out_rep            : output representation
+ * @in_path            : input path
+ * @size               : size of output representation
+ *
+ * Generates a short representation of path. It should only
+ * be used for displaying the result; the output representation is not
+ * binding in any meaningful way (for a normal path, this is the same as basename)
+ * In case of more complex URLs, this should cut everything except for
+ * the main image file.
+ *
+ * E.g.: "/path/to/game.img" -> game.img
+ *       "/path/to/myarchive.7z#folder/to/game.img" -> game.img
+ */
+size_t fill_short_pathname_representation(char* out_rep,
+      const char *in_path, size_t size);
+
+void fill_short_pathname_representation_noext(char* out_rep,
+      const char *in_path, size_t size);
+
+void fill_pathname_expand_special(char *out_path,
+      const char *in_path, size_t size);
+
+void fill_pathname_abbreviate_special(char *out_path,
+      const char *in_path, size_t size);
+
+void fill_pathname_abbreviated_or_relative(char *out_path, const char *in_refpath, const char *in_path, size_t size);
+
+void pathname_conform_slashes_to_os(char *path);
+
+void pathname_make_slashes_portable(char *path);
+
+/**
+ * path_basedir:
+ * @path               : path
+ *
+ * Extracts base directory by mutating path.
+ * Keeps trailing '/'.
+ **/
+void path_basedir_wrapper(char *path);
+
+/**
+ * path_char_is_slash:
+ * @c                  : character
+ *
+ * Checks if character (@c) is a slash.
+ *
+ * Returns: true (1) if character is a slash, otherwise false (0).
+ */
+#ifdef _WIN32
+#define PATH_CHAR_IS_SLASH(c) (((c) == '/') || ((c) == '\\'))
+#else
+#define PATH_CHAR_IS_SLASH(c) ((c) == '/')
+#endif
+
+/**
+ * path_default_slash and path_default_slash_c:
+ *
+ * Gets the default slash separator.
+ *
+ * Returns: default slash separator.
+ */
+#ifdef _WIN32
+#define PATH_DEFAULT_SLASH() "\\"
+#define PATH_DEFAULT_SLASH_C() '\\'
+#else
+#define PATH_DEFAULT_SLASH() "/"
+#define PATH_DEFAULT_SLASH_C() '/'
+#endif
+
+/**
+ * fill_pathname_slash:
+ * @path               : path
+ * @size               : size of path
+ *
+ * Assumes path is a directory. Appends a slash
+ * if not already there.
+ **/
+void fill_pathname_slash(char *path, size_t size);
+
+#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
+void fill_pathname_application_path(char *buf, size_t size);
+void fill_pathname_application_dir(char *buf, size_t size);
+void fill_pathname_home_dir(char *buf, size_t size);
+#endif
+
+/**
+ * path_mkdir:
+ * @dir                : directory
+ *
+ * Create directory on filesystem.
+ *
+ * Returns: true (1) if directory could be created, otherwise false (0).
+ **/
+bool path_mkdir(const char *dir);
+
+/**
+ * path_is_directory:
+ * @path               : path
+ *
+ * Checks if path is a directory.
+ *
+ * Returns: true (1) if path is a directory, otherwise false (0).
+ */
+bool path_is_directory(const char *path);
+
+bool path_is_character_special(const char *path);
+
+int path_stat(const char *path);
+
+bool path_is_valid(const char *path);
+
+int32_t path_get_size(const char *path);
+
+bool is_path_accessible_using_standard_io(const char *path);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/filters.h b/ThirdParty/RetroArch/libretro-common/include/filters.h
new file mode 100644
index 000000000..be186acf9
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/filters.h
@@ -0,0 +1,93 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (filters.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_SDK_FILTERS_H
+#define _LIBRETRO_SDK_FILTERS_H
+
+/* for MSVC; should be benign under any circumstances */
+#define _USE_MATH_DEFINES
+
+#include <stdlib.h>
+#include <math.h>
+#include <retro_inline.h>
+#include <retro_math.h>
+
+static INLINE double sinc(double val)
+{
+   if (fabs(val) < 0.00001)
+      return 1.0;
+   return sin(val) / val;
+}
+
+/* Paeth prediction filter. */
+static INLINE int paeth(int a, int b, int c)
+{
+   int p  = a + b - c;
+   int pa = abs(p - a);
+   int pb = abs(p - b);
+   int pc = abs(p - c);
+
+   if (pa <= pb && pa <= pc)
+      return a;
+   else if (pb <= pc)
+      return b;
+   return c;
+}
+
+/* Modified Bessel function of first order.
+ * Check Wiki for mathematical definition ... */
+static INLINE double besseli0(double x)
+{
+   unsigned i;
+   double sum            = 0.0;
+   double factorial      = 1.0;
+   double factorial_mult = 0.0;
+   double x_pow          = 1.0;
+   double two_div_pow    = 1.0;
+   double x_sqr          = x * x;
+
+   /* Approximate. This is an infinite sum.
+    * Luckily, it converges rather fast. */
+   for (i = 0; i < 18; i++)
+   {
+      sum += x_pow * two_div_pow / (factorial * factorial);
+
+      factorial_mult += 1.0;
+      x_pow *= x_sqr;
+      two_div_pow *= 0.25;
+      factorial *= factorial_mult;
+   }
+
+   return sum;
+}
+
+static INLINE double kaiser_window_function(double index, double beta)
+{
+   return besseli0(beta * sqrtf(1 - index * index));
+}
+
+static INLINE double lanzcos_window_function(double index)
+{
+   return sinc(M_PI * index);
+}
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/libretro.h b/ThirdParty/RetroArch/libretro-common/include/libretro.h
new file mode 100644
index 000000000..755279e0a
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/libretro.h
@@ -0,0 +1,3894 @@
+/* Copyright (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this libretro API header (libretro.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef LIBRETRO_H__
+#define LIBRETRO_H__
+
+#include <stdint.h>
+#include <stddef.h>
+#include <limits.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef __cplusplus
+#if defined(_MSC_VER) && _MSC_VER < 1800 && !defined(SN_TARGET_PS3)
+/* Hack applied for MSVC when compiling in C89 mode
+ * as it isn't C99-compliant. */
+#define bool unsigned char
+#define true 1
+#define false 0
+#else
+#include <stdbool.h>
+#endif
+#endif
+
+#ifndef RETRO_CALLCONV
+#  if defined(__GNUC__) && defined(__i386__) && !defined(__x86_64__)
+#    define RETRO_CALLCONV __attribute__((cdecl))
+#  elif defined(_MSC_VER) && defined(_M_X86) && !defined(_M_X64)
+#    define RETRO_CALLCONV __cdecl
+#  else
+#    define RETRO_CALLCONV /* all other platforms only have one calling convention each */
+#  endif
+#endif
+
+#ifndef RETRO_API
+#  if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
+#    ifdef RETRO_IMPORT_SYMBOLS
+#      ifdef __GNUC__
+#        define RETRO_API RETRO_CALLCONV __attribute__((__dllimport__))
+#      else
+#        define RETRO_API RETRO_CALLCONV __declspec(dllimport)
+#      endif
+#    else
+#      ifdef __GNUC__
+#        define RETRO_API RETRO_CALLCONV __attribute__((__dllexport__))
+#      else
+#        define RETRO_API RETRO_CALLCONV __declspec(dllexport)
+#      endif
+#    endif
+#  else
+#      if defined(__GNUC__) && __GNUC__ >= 4
+#        define RETRO_API RETRO_CALLCONV __attribute__((__visibility__("default")))
+#      else
+#        define RETRO_API RETRO_CALLCONV
+#      endif
+#  endif
+#endif
+
+/* Used for checking API/ABI mismatches that can break libretro
+ * implementations.
+ * It is not incremented for compatible changes to the API.
+ */
+#define RETRO_API_VERSION         1
+
+/*
+ * Libretro's fundamental device abstractions.
+ *
+ * Libretro's input system consists of some standardized device types,
+ * such as a joypad (with/without analog), mouse, keyboard, lightgun
+ * and a pointer.
+ *
+ * The functionality of these devices are fixed, and individual cores
+ * map their own concept of a controller to libretro's abstractions.
+ * This makes it possible for frontends to map the abstract types to a
+ * real input device, and not having to worry about binding input
+ * correctly to arbitrary controller layouts.
+ */
+
+#define RETRO_DEVICE_TYPE_SHIFT         8
+#define RETRO_DEVICE_MASK               ((1 << RETRO_DEVICE_TYPE_SHIFT) - 1)
+#define RETRO_DEVICE_SUBCLASS(base, id) (((id + 1) << RETRO_DEVICE_TYPE_SHIFT) | base)
+
+/* Input disabled. */
+#define RETRO_DEVICE_NONE         0
+
+/* The JOYPAD is called RetroPad. It is essentially a Super Nintendo
+ * controller, but with additional L2/R2/L3/R3 buttons, similar to a
+ * PS1 DualShock. */
+#define RETRO_DEVICE_JOYPAD       1
+
+/* The mouse is a simple mouse, similar to Super Nintendo's mouse.
+ * X and Y coordinates are reported relatively to last poll (poll callback).
+ * It is up to the libretro implementation to keep track of where the mouse
+ * pointer is supposed to be on the screen.
+ * The frontend must make sure not to interfere with its own hardware
+ * mouse pointer.
+ */
+#define RETRO_DEVICE_MOUSE        2
+
+/* KEYBOARD device lets one poll for raw key pressed.
+ * It is poll based, so input callback will return with the current
+ * pressed state.
+ * For event/text based keyboard input, see
+ * RETRO_ENVIRONMENT_SET_KEYBOARD_CALLBACK.
+ */
+#define RETRO_DEVICE_KEYBOARD     3
+
+/* LIGHTGUN device is similar to Guncon-2 for PlayStation 2.
+ * It reports X/Y coordinates in screen space (similar to the pointer)
+ * in the range [-0x8000, 0x7fff] in both axes, with zero being center and
+ * -0x8000 being out of bounds.
+ * As well as reporting on/off screen state. It features a trigger,
+ * start/select buttons, auxiliary action buttons and a
+ * directional pad. A forced off-screen shot can be requested for
+ * auto-reloading function in some games.
+ */
+#define RETRO_DEVICE_LIGHTGUN     4
+
+/* The ANALOG device is an extension to JOYPAD (RetroPad).
+ * Similar to DualShock2 it adds two analog sticks and all buttons can
+ * be analog. This is treated as a separate device type as it returns
+ * axis values in the full analog range of [-0x7fff, 0x7fff],
+ * although some devices may return -0x8000.
+ * Positive X axis is right. Positive Y axis is down.
+ * Buttons are returned in the range [0, 0x7fff].
+ * Only use ANALOG type when polling for analog values.
+ */
+#define RETRO_DEVICE_ANALOG       5
+
+/* Abstracts the concept of a pointing mechanism, e.g. touch.
+ * This allows libretro to query in absolute coordinates where on the
+ * screen a mouse (or something similar) is being placed.
+ * For a touch centric device, coordinates reported are the coordinates
+ * of the press.
+ *
+ * Coordinates in X and Y are reported as:
+ * [-0x7fff, 0x7fff]: -0x7fff corresponds to the far left/top of the screen,
+ * and 0x7fff corresponds to the far right/bottom of the screen.
+ * The "screen" is here defined as area that is passed to the frontend and
+ * later displayed on the monitor.
+ *
+ * The frontend is free to scale/resize this screen as it sees fit, however,
+ * (X, Y) = (-0x7fff, -0x7fff) will correspond to the top-left pixel of the
+ * game image, etc.
+ *
+ * To check if the pointer coordinates are valid (e.g. a touch display
+ * actually being touched), PRESSED returns 1 or 0.
+ *
+ * If using a mouse on a desktop, PRESSED will usually correspond to the
+ * left mouse button, but this is a frontend decision.
+ * PRESSED will only return 1 if the pointer is inside the game screen.
+ *
+ * For multi-touch, the index variable can be used to successively query
+ * more presses.
+ * If index = 0 returns true for _PRESSED, coordinates can be extracted
+ * with _X, _Y for index = 0. One can then query _PRESSED, _X, _Y with
+ * index = 1, and so on.
+ * Eventually _PRESSED will return false for an index. No further presses
+ * are registered at this point. */
+#define RETRO_DEVICE_POINTER      6
+
+/* Buttons for the RetroPad (JOYPAD).
+ * The placement of these is equivalent to placements on the
+ * Super Nintendo controller.
+ * L2/R2/L3/R3 buttons correspond to the PS1 DualShock.
+ * Also used as id values for RETRO_DEVICE_INDEX_ANALOG_BUTTON */
+#define RETRO_DEVICE_ID_JOYPAD_B        0
+#define RETRO_DEVICE_ID_JOYPAD_Y        1
+#define RETRO_DEVICE_ID_JOYPAD_SELECT   2
+#define RETRO_DEVICE_ID_JOYPAD_START    3
+#define RETRO_DEVICE_ID_JOYPAD_UP       4
+#define RETRO_DEVICE_ID_JOYPAD_DOWN     5
+#define RETRO_DEVICE_ID_JOYPAD_LEFT     6
+#define RETRO_DEVICE_ID_JOYPAD_RIGHT    7
+#define RETRO_DEVICE_ID_JOYPAD_A        8
+#define RETRO_DEVICE_ID_JOYPAD_X        9
+#define RETRO_DEVICE_ID_JOYPAD_L       10
+#define RETRO_DEVICE_ID_JOYPAD_R       11
+#define RETRO_DEVICE_ID_JOYPAD_L2      12
+#define RETRO_DEVICE_ID_JOYPAD_R2      13
+#define RETRO_DEVICE_ID_JOYPAD_L3      14
+#define RETRO_DEVICE_ID_JOYPAD_R3      15
+
+#define RETRO_DEVICE_ID_JOYPAD_MASK    256
+
+/* Index / Id values for ANALOG device. */
+#define RETRO_DEVICE_INDEX_ANALOG_LEFT       0
+#define RETRO_DEVICE_INDEX_ANALOG_RIGHT      1
+#define RETRO_DEVICE_INDEX_ANALOG_BUTTON     2
+#define RETRO_DEVICE_ID_ANALOG_X             0
+#define RETRO_DEVICE_ID_ANALOG_Y             1
+
+/* Id values for MOUSE. */
+#define RETRO_DEVICE_ID_MOUSE_X                0
+#define RETRO_DEVICE_ID_MOUSE_Y                1
+#define RETRO_DEVICE_ID_MOUSE_LEFT             2
+#define RETRO_DEVICE_ID_MOUSE_RIGHT            3
+#define RETRO_DEVICE_ID_MOUSE_WHEELUP          4
+#define RETRO_DEVICE_ID_MOUSE_WHEELDOWN        5
+#define RETRO_DEVICE_ID_MOUSE_MIDDLE           6
+#define RETRO_DEVICE_ID_MOUSE_HORIZ_WHEELUP    7
+#define RETRO_DEVICE_ID_MOUSE_HORIZ_WHEELDOWN  8
+#define RETRO_DEVICE_ID_MOUSE_BUTTON_4         9
+#define RETRO_DEVICE_ID_MOUSE_BUTTON_5         10
+
+/* Id values for LIGHTGUN. */
+#define RETRO_DEVICE_ID_LIGHTGUN_SCREEN_X        13 /*Absolute Position*/
+#define RETRO_DEVICE_ID_LIGHTGUN_SCREEN_Y        14 /*Absolute*/
+#define RETRO_DEVICE_ID_LIGHTGUN_IS_OFFSCREEN    15 /*Status Check*/
+#define RETRO_DEVICE_ID_LIGHTGUN_TRIGGER          2
+#define RETRO_DEVICE_ID_LIGHTGUN_RELOAD          16 /*Forced off-screen shot*/
+#define RETRO_DEVICE_ID_LIGHTGUN_AUX_A            3
+#define RETRO_DEVICE_ID_LIGHTGUN_AUX_B            4
+#define RETRO_DEVICE_ID_LIGHTGUN_START            6
+#define RETRO_DEVICE_ID_LIGHTGUN_SELECT           7
+#define RETRO_DEVICE_ID_LIGHTGUN_AUX_C            8
+#define RETRO_DEVICE_ID_LIGHTGUN_DPAD_UP          9
+#define RETRO_DEVICE_ID_LIGHTGUN_DPAD_DOWN       10
+#define RETRO_DEVICE_ID_LIGHTGUN_DPAD_LEFT       11
+#define RETRO_DEVICE_ID_LIGHTGUN_DPAD_RIGHT      12
+/* deprecated */
+#define RETRO_DEVICE_ID_LIGHTGUN_X                0 /*Relative Position*/
+#define RETRO_DEVICE_ID_LIGHTGUN_Y                1 /*Relative*/
+#define RETRO_DEVICE_ID_LIGHTGUN_CURSOR           3 /*Use Aux:A*/
+#define RETRO_DEVICE_ID_LIGHTGUN_TURBO            4 /*Use Aux:B*/
+#define RETRO_DEVICE_ID_LIGHTGUN_PAUSE            5 /*Use Start*/
+
+/* Id values for POINTER. */
+#define RETRO_DEVICE_ID_POINTER_X         0
+#define RETRO_DEVICE_ID_POINTER_Y         1
+#define RETRO_DEVICE_ID_POINTER_PRESSED   2
+#define RETRO_DEVICE_ID_POINTER_COUNT     3
+
+/* Returned from retro_get_region(). */
+#define RETRO_REGION_NTSC  0
+#define RETRO_REGION_PAL   1
+
+/* Id values for LANGUAGE */
+enum retro_language
+{
+   RETRO_LANGUAGE_ENGLISH             = 0,
+   RETRO_LANGUAGE_JAPANESE            = 1,
+   RETRO_LANGUAGE_FRENCH              = 2,
+   RETRO_LANGUAGE_SPANISH             = 3,
+   RETRO_LANGUAGE_GERMAN              = 4,
+   RETRO_LANGUAGE_ITALIAN             = 5,
+   RETRO_LANGUAGE_DUTCH               = 6,
+   RETRO_LANGUAGE_PORTUGUESE_BRAZIL   = 7,
+   RETRO_LANGUAGE_PORTUGUESE_PORTUGAL = 8,
+   RETRO_LANGUAGE_RUSSIAN             = 9,
+   RETRO_LANGUAGE_KOREAN              = 10,
+   RETRO_LANGUAGE_CHINESE_TRADITIONAL = 11,
+   RETRO_LANGUAGE_CHINESE_SIMPLIFIED  = 12,
+   RETRO_LANGUAGE_ESPERANTO           = 13,
+   RETRO_LANGUAGE_POLISH              = 14,
+   RETRO_LANGUAGE_VIETNAMESE          = 15,
+   RETRO_LANGUAGE_ARABIC              = 16,
+   RETRO_LANGUAGE_GREEK               = 17,
+   RETRO_LANGUAGE_TURKISH             = 18,
+   RETRO_LANGUAGE_SLOVAK              = 19,
+   RETRO_LANGUAGE_PERSIAN             = 20,
+   RETRO_LANGUAGE_HEBREW              = 21,
+   RETRO_LANGUAGE_ASTURIAN            = 22,
+   RETRO_LANGUAGE_FINNISH             = 23,
+   RETRO_LANGUAGE_LAST,
+
+   /* Ensure sizeof(enum) == sizeof(int) */
+   RETRO_LANGUAGE_DUMMY          = INT_MAX
+};
+
+/* Passed to retro_get_memory_data/size().
+ * If the memory type doesn't apply to the
+ * implementation NULL/0 can be returned.
+ */
+#define RETRO_MEMORY_MASK        0xff
+
+/* Regular save RAM. This RAM is usually found on a game cartridge,
+ * backed up by a battery.
+ * If save game data is too complex for a single memory buffer,
+ * the SAVE_DIRECTORY (preferably) or SYSTEM_DIRECTORY environment
+ * callback can be used. */
+#define RETRO_MEMORY_SAVE_RAM    0
+
+/* Some games have a built-in clock to keep track of time.
+ * This memory is usually just a couple of bytes to keep track of time.
+ */
+#define RETRO_MEMORY_RTC         1
+
+/* System ram lets a frontend peek into a game systems main RAM. */
+#define RETRO_MEMORY_SYSTEM_RAM  2
+
+/* Video ram lets a frontend peek into a game systems video RAM (VRAM). */
+#define RETRO_MEMORY_VIDEO_RAM   3
+
+/* Keysyms used for ID in input state callback when polling RETRO_KEYBOARD. */
+enum retro_key
+{
+   RETROK_UNKNOWN        = 0,
+   RETROK_FIRST          = 0,
+   RETROK_BACKSPACE      = 8,
+   RETROK_TAB            = 9,
+   RETROK_CLEAR          = 12,
+   RETROK_RETURN         = 13,
+   RETROK_PAUSE          = 19,
+   RETROK_ESCAPE         = 27,
+   RETROK_SPACE          = 32,
+   RETROK_EXCLAIM        = 33,
+   RETROK_QUOTEDBL       = 34,
+   RETROK_HASH           = 35,
+   RETROK_DOLLAR         = 36,
+   RETROK_AMPERSAND      = 38,
+   RETROK_QUOTE          = 39,
+   RETROK_LEFTPAREN      = 40,
+   RETROK_RIGHTPAREN     = 41,
+   RETROK_ASTERISK       = 42,
+   RETROK_PLUS           = 43,
+   RETROK_COMMA          = 44,
+   RETROK_MINUS          = 45,
+   RETROK_PERIOD         = 46,
+   RETROK_SLASH          = 47,
+   RETROK_0              = 48,
+   RETROK_1              = 49,
+   RETROK_2              = 50,
+   RETROK_3              = 51,
+   RETROK_4              = 52,
+   RETROK_5              = 53,
+   RETROK_6              = 54,
+   RETROK_7              = 55,
+   RETROK_8              = 56,
+   RETROK_9              = 57,
+   RETROK_COLON          = 58,
+   RETROK_SEMICOLON      = 59,
+   RETROK_LESS           = 60,
+   RETROK_EQUALS         = 61,
+   RETROK_GREATER        = 62,
+   RETROK_QUESTION       = 63,
+   RETROK_AT             = 64,
+   RETROK_LEFTBRACKET    = 91,
+   RETROK_BACKSLASH      = 92,
+   RETROK_RIGHTBRACKET   = 93,
+   RETROK_CARET          = 94,
+   RETROK_UNDERSCORE     = 95,
+   RETROK_BACKQUOTE      = 96,
+   RETROK_a              = 97,
+   RETROK_b              = 98,
+   RETROK_c              = 99,
+   RETROK_d              = 100,
+   RETROK_e              = 101,
+   RETROK_f              = 102,
+   RETROK_g              = 103,
+   RETROK_h              = 104,
+   RETROK_i              = 105,
+   RETROK_j              = 106,
+   RETROK_k              = 107,
+   RETROK_l              = 108,
+   RETROK_m              = 109,
+   RETROK_n              = 110,
+   RETROK_o              = 111,
+   RETROK_p              = 112,
+   RETROK_q              = 113,
+   RETROK_r              = 114,
+   RETROK_s              = 115,
+   RETROK_t              = 116,
+   RETROK_u              = 117,
+   RETROK_v              = 118,
+   RETROK_w              = 119,
+   RETROK_x              = 120,
+   RETROK_y              = 121,
+   RETROK_z              = 122,
+   RETROK_LEFTBRACE      = 123,
+   RETROK_BAR            = 124,
+   RETROK_RIGHTBRACE     = 125,
+   RETROK_TILDE          = 126,
+   RETROK_DELETE         = 127,
+
+   RETROK_KP0            = 256,
+   RETROK_KP1            = 257,
+   RETROK_KP2            = 258,
+   RETROK_KP3            = 259,
+   RETROK_KP4            = 260,
+   RETROK_KP5            = 261,
+   RETROK_KP6            = 262,
+   RETROK_KP7            = 263,
+   RETROK_KP8            = 264,
+   RETROK_KP9            = 265,
+   RETROK_KP_PERIOD      = 266,
+   RETROK_KP_DIVIDE      = 267,
+   RETROK_KP_MULTIPLY    = 268,
+   RETROK_KP_MINUS       = 269,
+   RETROK_KP_PLUS        = 270,
+   RETROK_KP_ENTER       = 271,
+   RETROK_KP_EQUALS      = 272,
+
+   RETROK_UP             = 273,
+   RETROK_DOWN           = 274,
+   RETROK_RIGHT          = 275,
+   RETROK_LEFT           = 276,
+   RETROK_INSERT         = 277,
+   RETROK_HOME           = 278,
+   RETROK_END            = 279,
+   RETROK_PAGEUP         = 280,
+   RETROK_PAGEDOWN       = 281,
+
+   RETROK_F1             = 282,
+   RETROK_F2             = 283,
+   RETROK_F3             = 284,
+   RETROK_F4             = 285,
+   RETROK_F5             = 286,
+   RETROK_F6             = 287,
+   RETROK_F7             = 288,
+   RETROK_F8             = 289,
+   RETROK_F9             = 290,
+   RETROK_F10            = 291,
+   RETROK_F11            = 292,
+   RETROK_F12            = 293,
+   RETROK_F13            = 294,
+   RETROK_F14            = 295,
+   RETROK_F15            = 296,
+
+   RETROK_NUMLOCK        = 300,
+   RETROK_CAPSLOCK       = 301,
+   RETROK_SCROLLOCK      = 302,
+   RETROK_RSHIFT         = 303,
+   RETROK_LSHIFT         = 304,
+   RETROK_RCTRL          = 305,
+   RETROK_LCTRL          = 306,
+   RETROK_RALT           = 307,
+   RETROK_LALT           = 308,
+   RETROK_RMETA          = 309,
+   RETROK_LMETA          = 310,
+   RETROK_LSUPER         = 311,
+   RETROK_RSUPER         = 312,
+   RETROK_MODE           = 313,
+   RETROK_COMPOSE        = 314,
+
+   RETROK_HELP           = 315,
+   RETROK_PRINT          = 316,
+   RETROK_SYSREQ         = 317,
+   RETROK_BREAK          = 318,
+   RETROK_MENU           = 319,
+   RETROK_POWER          = 320,
+   RETROK_EURO           = 321,
+   RETROK_UNDO           = 322,
+   RETROK_OEM_102        = 323,
+
+   RETROK_LAST,
+
+   RETROK_DUMMY          = INT_MAX /* Ensure sizeof(enum) == sizeof(int) */
+};
+
+enum retro_mod
+{
+   RETROKMOD_NONE       = 0x0000,
+
+   RETROKMOD_SHIFT      = 0x01,
+   RETROKMOD_CTRL       = 0x02,
+   RETROKMOD_ALT        = 0x04,
+   RETROKMOD_META       = 0x08,
+
+   RETROKMOD_NUMLOCK    = 0x10,
+   RETROKMOD_CAPSLOCK   = 0x20,
+   RETROKMOD_SCROLLOCK  = 0x40,
+
+   RETROKMOD_DUMMY = INT_MAX /* Ensure sizeof(enum) == sizeof(int) */
+};
+
+/* If set, this call is not part of the public libretro API yet. It can
+ * change or be removed at any time. */
+#define RETRO_ENVIRONMENT_EXPERIMENTAL 0x10000
+/* Environment callback to be used internally in frontend. */
+#define RETRO_ENVIRONMENT_PRIVATE 0x20000
+
+/* Environment commands. */
+#define RETRO_ENVIRONMENT_SET_ROTATION  1  /* const unsigned * --
+                                            * Sets screen rotation of graphics.
+                                            * Valid values are 0, 1, 2, 3, which rotates screen by 0, 90, 180,
+                                            * 270 degrees counter-clockwise respectively.
+                                            */
+#define RETRO_ENVIRONMENT_GET_OVERSCAN  2  /* bool * --
+                                            * NOTE: As of 2019 this callback is considered deprecated in favor of
+                                            * using core options to manage overscan in a more nuanced, core-specific way.
+                                            *
+                                            * Boolean value whether or not the implementation should use overscan,
+                                            * or crop away overscan.
+                                            */
+#define RETRO_ENVIRONMENT_GET_CAN_DUPE  3  /* bool * --
+                                            * Boolean value whether or not frontend supports frame duping,
+                                            * passing NULL to video frame callback.
+                                            */
+
+                                           /* Environ 4, 5 are no longer supported (GET_VARIABLE / SET_VARIABLES),
+                                            * and reserved to avoid possible ABI clash.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_MESSAGE   6  /* const struct retro_message * --
+                                            * Sets a message to be displayed in implementation-specific manner
+                                            * for a certain amount of 'frames'.
+                                            * Should not be used for trivial messages, which should simply be
+                                            * logged via RETRO_ENVIRONMENT_GET_LOG_INTERFACE (or as a
+                                            * fallback, stderr).
+                                            */
+#define RETRO_ENVIRONMENT_SHUTDOWN      7  /* N/A (NULL) --
+                                            * Requests the frontend to shutdown.
+                                            * Should only be used if game has a specific
+                                            * way to shutdown the game from a menu item or similar.
+                                            */
+#define RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL 8
+                                           /* const unsigned * --
+                                            * Gives a hint to the frontend how demanding this implementation
+                                            * is on a system. E.g. reporting a level of 2 means
+                                            * this implementation should run decently on all frontends
+                                            * of level 2 and up.
+                                            *
+                                            * It can be used by the frontend to potentially warn
+                                            * about too demanding implementations.
+                                            *
+                                            * The levels are "floating".
+                                            *
+                                            * This function can be called on a per-game basis,
+                                            * as certain games an implementation can play might be
+                                            * particularly demanding.
+                                            * If called, it should be called in retro_load_game().
+                                            */
+#define RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY 9
+                                           /* const char ** --
+                                            * Returns the "system" directory of the frontend.
+                                            * This directory can be used to store system specific
+                                            * content such as BIOSes, configuration data, etc.
+                                            * The returned value can be NULL.
+                                            * If so, no such directory is defined,
+                                            * and it's up to the implementation to find a suitable directory.
+                                            *
+                                            * NOTE: Some cores used this folder also for "save" data such as
+                                            * memory cards, etc, for lack of a better place to put it.
+                                            * This is now discouraged, and if possible, cores should try to
+                                            * use the new GET_SAVE_DIRECTORY.
+                                            */
+#define RETRO_ENVIRONMENT_SET_PIXEL_FORMAT 10
+                                           /* const enum retro_pixel_format * --
+                                            * Sets the internal pixel format used by the implementation.
+                                            * The default pixel format is RETRO_PIXEL_FORMAT_0RGB1555.
+                                            * This pixel format however, is deprecated (see enum retro_pixel_format).
+                                            * If the call returns false, the frontend does not support this pixel
+                                            * format.
+                                            *
+                                            * This function should be called inside retro_load_game() or
+                                            * retro_get_system_av_info().
+                                            */
+#define RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS 11
+                                           /* const struct retro_input_descriptor * --
+                                            * Sets an array of retro_input_descriptors.
+                                            * It is up to the frontend to present this in a usable way.
+                                            * The array is terminated by retro_input_descriptor::description
+                                            * being set to NULL.
+                                            * This function can be called at any time, but it is recommended
+                                            * to call it as early as possible.
+                                            */
+#define RETRO_ENVIRONMENT_SET_KEYBOARD_CALLBACK 12
+                                           /* const struct retro_keyboard_callback * --
+                                            * Sets a callback function used to notify core about keyboard events.
+                                            */
+#define RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE 13
+                                           /* const struct retro_disk_control_callback * --
+                                            * Sets an interface which frontend can use to eject and insert
+                                            * disk images.
+                                            * This is used for games which consist of multiple images and
+                                            * must be manually swapped out by the user (e.g. PSX).
+                                            */
+#define RETRO_ENVIRONMENT_SET_HW_RENDER 14
+                                           /* struct retro_hw_render_callback * --
+                                            * Sets an interface to let a libretro core render with
+                                            * hardware acceleration.
+                                            * Should be called in retro_load_game().
+                                            * If successful, libretro cores will be able to render to a
+                                            * frontend-provided framebuffer.
+                                            * The size of this framebuffer will be at least as large as
+                                            * max_width/max_height provided in get_av_info().
+                                            * If HW rendering is used, pass only RETRO_HW_FRAME_BUFFER_VALID or
+                                            * NULL to retro_video_refresh_t.
+                                            */
+#define RETRO_ENVIRONMENT_GET_VARIABLE 15
+                                           /* struct retro_variable * --
+                                            * Interface to acquire user-defined information from environment
+                                            * that cannot feasibly be supported in a multi-system way.
+                                            * 'key' should be set to a key which has already been set by
+                                            * SET_VARIABLES.
+                                            * 'data' will be set to a value or NULL.
+                                            */
+#define RETRO_ENVIRONMENT_SET_VARIABLES 16
+                                           /* const struct retro_variable * --
+                                            * Allows an implementation to signal the environment
+                                            * which variables it might want to check for later using
+                                            * GET_VARIABLE.
+                                            * This allows the frontend to present these variables to
+                                            * a user dynamically.
+                                            * This should be called the first time as early as
+                                            * possible (ideally in retro_set_environment).
+                                            * Afterward it may be called again for the core to communicate
+                                            * updated options to the frontend, but the number of core
+                                            * options must not change from the number in the initial call.
+                                            *
+                                            * 'data' points to an array of retro_variable structs
+                                            * terminated by a { NULL, NULL } element.
+                                            * retro_variable::key should be namespaced to not collide
+                                            * with other implementations' keys. E.g. A core called
+                                            * 'foo' should use keys named as 'foo_option'.
+                                            * retro_variable::value should contain a human readable
+                                            * description of the key as well as a '|' delimited list
+                                            * of expected values.
+                                            *
+                                            * The number of possible options should be very limited,
+                                            * i.e. it should be feasible to cycle through options
+                                            * without a keyboard.
+                                            *
+                                            * First entry should be treated as a default.
+                                            *
+                                            * Example entry:
+                                            * { "foo_option", "Speed hack coprocessor X; false|true" }
+                                            *
+                                            * Text before first ';' is description. This ';' must be
+                                            * followed by a space, and followed by a list of possible
+                                            * values split up with '|'.
+                                            *
+                                            * Only strings are operated on. The possible values will
+                                            * generally be displayed and stored as-is by the frontend.
+                                            */
+#define RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE 17
+                                           /* bool * --
+                                            * Result is set to true if some variables are updated by
+                                            * frontend since last call to RETRO_ENVIRONMENT_GET_VARIABLE.
+                                            * Variables should be queried with GET_VARIABLE.
+                                            */
+#define RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME 18
+                                           /* const bool * --
+                                            * If true, the libretro implementation supports calls to
+                                            * retro_load_game() with NULL as argument.
+                                            * Used by cores which can run without particular game data.
+                                            * This should be called within retro_set_environment() only.
+                                            */
+#define RETRO_ENVIRONMENT_GET_LIBRETRO_PATH 19
+                                           /* const char ** --
+                                            * Retrieves the absolute path from where this libretro
+                                            * implementation was loaded.
+                                            * NULL is returned if the libretro was loaded statically
+                                            * (i.e. linked statically to frontend), or if the path cannot be
+                                            * determined.
+                                            * Mostly useful in cooperation with SET_SUPPORT_NO_GAME as assets can
+                                            * be loaded without ugly hacks.
+                                            */
+
+                                           /* Environment 20 was an obsolete version of SET_AUDIO_CALLBACK.
+                                            * It was not used by any known core at the time,
+                                            * and was removed from the API. */
+#define RETRO_ENVIRONMENT_SET_FRAME_TIME_CALLBACK 21
+                                           /* const struct retro_frame_time_callback * --
+                                            * Lets the core know how much time has passed since last
+                                            * invocation of retro_run().
+                                            * The frontend can tamper with the timing to fake fast-forward,
+                                            * slow-motion, frame stepping, etc.
+                                            * In this case the delta time will use the reference value
+                                            * in frame_time_callback..
+                                            */
+#define RETRO_ENVIRONMENT_SET_AUDIO_CALLBACK 22
+                                           /* const struct retro_audio_callback * --
+                                            * Sets an interface which is used to notify a libretro core about audio
+                                            * being available for writing.
+                                            * The callback can be called from any thread, so a core using this must
+                                            * have a thread safe audio implementation.
+                                            * It is intended for games where audio and video are completely
+                                            * asynchronous and audio can be generated on the fly.
+                                            * This interface is not recommended for use with emulators which have
+                                            * highly synchronous audio.
+                                            *
+                                            * The callback only notifies about writability; the libretro core still
+                                            * has to call the normal audio callbacks
+                                            * to write audio. The audio callbacks must be called from within the
+                                            * notification callback.
+                                            * The amount of audio data to write is up to the implementation.
+                                            * Generally, the audio callback will be called continously in a loop.
+                                            *
+                                            * Due to thread safety guarantees and lack of sync between audio and
+                                            * video, a frontend  can selectively disallow this interface based on
+                                            * internal configuration. A core using this interface must also
+                                            * implement the "normal" audio interface.
+                                            *
+                                            * A libretro core using SET_AUDIO_CALLBACK should also make use of
+                                            * SET_FRAME_TIME_CALLBACK.
+                                            */
+#define RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE 23
+                                           /* struct retro_rumble_interface * --
+                                            * Gets an interface which is used by a libretro core to set
+                                            * state of rumble motors in controllers.
+                                            * A strong and weak motor is supported, and they can be
+                                            * controlled indepedently.
+                                            * Should be called from either retro_init() or retro_load_game().
+                                            * Should not be called from retro_set_environment().
+                                            * Returns false if rumble functionality is unavailable.
+                                            */
+#define RETRO_ENVIRONMENT_GET_INPUT_DEVICE_CAPABILITIES 24
+                                           /* uint64_t * --
+                                            * Gets a bitmask telling which device type are expected to be
+                                            * handled properly in a call to retro_input_state_t.
+                                            * Devices which are not handled or recognized always return
+                                            * 0 in retro_input_state_t.
+                                            * Example bitmask: caps = (1 << RETRO_DEVICE_JOYPAD) | (1 << RETRO_DEVICE_ANALOG).
+                                            * Should only be called in retro_run().
+                                            */
+#define RETRO_ENVIRONMENT_GET_SENSOR_INTERFACE (25 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* struct retro_sensor_interface * --
+                                            * Gets access to the sensor interface.
+                                            * The purpose of this interface is to allow
+                                            * setting state related to sensors such as polling rate,
+                                            * enabling/disable it entirely, etc.
+                                            * Reading sensor state is done via the normal
+                                            * input_state_callback API.
+                                            */
+#define RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE (26 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* struct retro_camera_callback * --
+                                            * Gets an interface to a video camera driver.
+                                            * A libretro core can use this interface to get access to a
+                                            * video camera.
+                                            * New video frames are delivered in a callback in same
+                                            * thread as retro_run().
+                                            *
+                                            * GET_CAMERA_INTERFACE should be called in retro_load_game().
+                                            *
+                                            * Depending on the camera implementation used, camera frames
+                                            * will be delivered as a raw framebuffer,
+                                            * or as an OpenGL texture directly.
+                                            *
+                                            * The core has to tell the frontend here which types of
+                                            * buffers can be handled properly.
+                                            * An OpenGL texture can only be handled when using a
+                                            * libretro GL core (SET_HW_RENDER).
+                                            * It is recommended to use a libretro GL core when
+                                            * using camera interface.
+                                            *
+                                            * The camera is not started automatically. The retrieved start/stop
+                                            * functions must be used to explicitly
+                                            * start and stop the camera driver.
+                                            */
+#define RETRO_ENVIRONMENT_GET_LOG_INTERFACE 27
+                                           /* struct retro_log_callback * --
+                                            * Gets an interface for logging. This is useful for
+                                            * logging in a cross-platform way
+                                            * as certain platforms cannot use stderr for logging.
+                                            * It also allows the frontend to
+                                            * show logging information in a more suitable way.
+                                            * If this interface is not used, libretro cores should
+                                            * log to stderr as desired.
+                                            */
+#define RETRO_ENVIRONMENT_GET_PERF_INTERFACE 28
+                                           /* struct retro_perf_callback * --
+                                            * Gets an interface for performance counters. This is useful
+                                            * for performance logging in a cross-platform way and for detecting
+                                            * architecture-specific features, such as SIMD support.
+                                            */
+#define RETRO_ENVIRONMENT_GET_LOCATION_INTERFACE 29
+                                           /* struct retro_location_callback * --
+                                            * Gets access to the location interface.
+                                            * The purpose of this interface is to be able to retrieve
+                                            * location-based information from the host device,
+                                            * such as current latitude / longitude.
+                                            */
+#define RETRO_ENVIRONMENT_GET_CONTENT_DIRECTORY 30 /* Old name, kept for compatibility. */
+#define RETRO_ENVIRONMENT_GET_CORE_ASSETS_DIRECTORY 30
+                                           /* const char ** --
+                                            * Returns the "core assets" directory of the frontend.
+                                            * This directory can be used to store specific assets that the
+                                            * core relies upon, such as art assets,
+                                            * input data, etc etc.
+                                            * The returned value can be NULL.
+                                            * If so, no such directory is defined,
+                                            * and it's up to the implementation to find a suitable directory.
+                                            */
+#define RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY 31
+                                           /* const char ** --
+                                            * Returns the "save" directory of the frontend, unless there is no
+                                            * save directory available. The save directory should be used to
+                                            * store SRAM, memory cards, high scores, etc, if the libretro core
+                                            * cannot use the regular memory interface (retro_get_memory_data()).
+                                            *
+                                            * If the frontend cannot designate a save directory, it will return
+                                            * NULL to indicate that the core should attempt to operate without a
+                                            * save directory set.
+                                            *
+                                            * NOTE: early libretro cores used the system directory for save
+                                            * files. Cores that need to be backwards-compatible can still check
+                                            * GET_SYSTEM_DIRECTORY.
+                                            */
+#define RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO 32
+                                           /* const struct retro_system_av_info * --
+                                            * Sets a new av_info structure. This can only be called from
+                                            * within retro_run().
+                                            * This should *only* be used if the core is completely altering the
+                                            * internal resolutions, aspect ratios, timings, sampling rate, etc.
+                                            * Calling this can require a full reinitialization of video/audio
+                                            * drivers in the frontend,
+                                            *
+                                            * so it is important to call it very sparingly, and usually only with
+                                            * the users explicit consent.
+                                            * An eventual driver reinitialize will happen so that video and
+                                            * audio callbacks
+                                            * happening after this call within the same retro_run() call will
+                                            * target the newly initialized driver.
+                                            *
+                                            * This callback makes it possible to support configurable resolutions
+                                            * in games, which can be useful to
+                                            * avoid setting the "worst case" in max_width/max_height.
+                                            *
+                                            * ***HIGHLY RECOMMENDED*** Do not call this callback every time
+                                            * resolution changes in an emulator core if it's
+                                            * expected to be a temporary change, for the reasons of possible
+                                            * driver reinitialization.
+                                            * This call is not a free pass for not trying to provide
+                                            * correct values in retro_get_system_av_info(). If you need to change
+                                            * things like aspect ratio or nominal width/height,
+                                            * use RETRO_ENVIRONMENT_SET_GEOMETRY, which is a softer variant
+                                            * of SET_SYSTEM_AV_INFO.
+                                            *
+                                            * If this returns false, the frontend does not acknowledge a
+                                            * changed av_info struct.
+                                            */
+#define RETRO_ENVIRONMENT_SET_PROC_ADDRESS_CALLBACK 33
+                                           /* const struct retro_get_proc_address_interface * --
+                                            * Allows a libretro core to announce support for the
+                                            * get_proc_address() interface.
+                                            * This interface allows for a standard way to extend libretro where
+                                            * use of environment calls are too indirect,
+                                            * e.g. for cases where the frontend wants to call directly into the core.
+                                            *
+                                            * If a core wants to expose this interface, SET_PROC_ADDRESS_CALLBACK
+                                            * **MUST** be called from within retro_set_environment().
+                                            */
+#define RETRO_ENVIRONMENT_SET_SUBSYSTEM_INFO 34
+                                           /* const struct retro_subsystem_info * --
+                                            * This environment call introduces the concept of libretro "subsystems".
+                                            * A subsystem is a variant of a libretro core which supports
+                                            * different kinds of games.
+                                            * The purpose of this is to support e.g. emulators which might
+                                            * have special needs, e.g. Super Nintendo's Super GameBoy, Sufami Turbo.
+                                            * It can also be used to pick among subsystems in an explicit way
+                                            * if the libretro implementation is a multi-system emulator itself.
+                                            *
+                                            * Loading a game via a subsystem is done with retro_load_game_special(),
+                                            * and this environment call allows a libretro core to expose which
+                                            * subsystems are supported for use with retro_load_game_special().
+                                            * A core passes an array of retro_game_special_info which is terminated
+                                            * with a zeroed out retro_game_special_info struct.
+                                            *
+                                            * If a core wants to use this functionality, SET_SUBSYSTEM_INFO
+                                            * **MUST** be called from within retro_set_environment().
+                                            */
+#define RETRO_ENVIRONMENT_SET_CONTROLLER_INFO 35
+                                           /* const struct retro_controller_info * --
+                                            * This environment call lets a libretro core tell the frontend
+                                            * which controller subclasses are recognized in calls to
+                                            * retro_set_controller_port_device().
+                                            *
+                                            * Some emulators such as Super Nintendo support multiple lightgun
+                                            * types which must be specifically selected from. It is therefore
+                                            * sometimes necessary for a frontend to be able to tell the core
+                                            * about a special kind of input device which is not specifcally
+                                            * provided by the Libretro API.
+                                            *
+                                            * In order for a frontend to understand the workings of those devices,
+                                            * they must be defined as a specialized subclass of the generic device
+                                            * types already defined in the libretro API.
+                                            *
+                                            * The core must pass an array of const struct retro_controller_info which
+                                            * is terminated with a blanked out struct. Each element of the
+                                            * retro_controller_info struct corresponds to the ascending port index
+                                            * that is passed to retro_set_controller_port_device() when that function
+                                            * is called to indicate to the core that the frontend has changed the
+                                            * active device subclass. SEE ALSO: retro_set_controller_port_device()
+                                            *
+                                            * The ascending input port indexes provided by the core in the struct
+                                            * are generally presented by frontends as ascending User # or Player #,
+                                            * such as Player 1, Player 2, Player 3, etc. Which device subclasses are
+                                            * supported can vary per input port.
+                                            *
+                                            * The first inner element of each entry in the retro_controller_info array
+                                            * is a retro_controller_description struct that specifies the names and
+                                            * codes of all device subclasses that are available for the corresponding
+                                            * User or Player, beginning with the generic Libretro device that the
+                                            * subclasses are derived from. The second inner element of each entry is the
+                                            * total number of subclasses that are listed in the retro_controller_description.
+                                            *
+                                            * NOTE: Even if special device types are set in the libretro core,
+                                            * libretro should only poll input based on the base input device types.
+                                            */
+#define RETRO_ENVIRONMENT_SET_MEMORY_MAPS (36 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* const struct retro_memory_map * --
+                                            * This environment call lets a libretro core tell the frontend
+                                            * about the memory maps this core emulates.
+                                            * This can be used to implement, for example, cheats in a core-agnostic way.
+                                            *
+                                            * Should only be used by emulators; it doesn't make much sense for
+                                            * anything else.
+                                            * It is recommended to expose all relevant pointers through
+                                            * retro_get_memory_* as well.
+                                            *
+                                            * Can be called from retro_init and retro_load_game.
+                                            */
+#define RETRO_ENVIRONMENT_SET_GEOMETRY 37
+                                           /* const struct retro_game_geometry * --
+                                            * This environment call is similar to SET_SYSTEM_AV_INFO for changing
+                                            * video parameters, but provides a guarantee that drivers will not be
+                                            * reinitialized.
+                                            * This can only be called from within retro_run().
+                                            *
+                                            * The purpose of this call is to allow a core to alter nominal
+                                            * width/heights as well as aspect ratios on-the-fly, which can be
+                                            * useful for some emulators to change in run-time.
+                                            *
+                                            * max_width/max_height arguments are ignored and cannot be changed
+                                            * with this call as this could potentially require a reinitialization or a
+                                            * non-constant time operation.
+                                            * If max_width/max_height are to be changed, SET_SYSTEM_AV_INFO is required.
+                                            *
+                                            * A frontend must guarantee that this environment call completes in
+                                            * constant time.
+                                            */
+#define RETRO_ENVIRONMENT_GET_USERNAME 38
+                                           /* const char **
+                                            * Returns the specified username of the frontend, if specified by the user.
+                                            * This username can be used as a nickname for a core that has online facilities
+                                            * or any other mode where personalization of the user is desirable.
+                                            * The returned value can be NULL.
+                                            * If this environ callback is used by a core that requires a valid username,
+                                            * a default username should be specified by the core.
+                                            */
+#define RETRO_ENVIRONMENT_GET_LANGUAGE 39
+                                           /* unsigned * --
+                                            * Returns the specified language of the frontend, if specified by the user.
+                                            * It can be used by the core for localization purposes.
+                                            */
+#define RETRO_ENVIRONMENT_GET_CURRENT_SOFTWARE_FRAMEBUFFER (40 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* struct retro_framebuffer * --
+                                            * Returns a preallocated framebuffer which the core can use for rendering
+                                            * the frame into when not using SET_HW_RENDER.
+                                            * The framebuffer returned from this call must not be used
+                                            * after the current call to retro_run() returns.
+                                            *
+                                            * The goal of this call is to allow zero-copy behavior where a core
+                                            * can render directly into video memory, avoiding extra bandwidth cost by copying
+                                            * memory from core to video memory.
+                                            *
+                                            * If this call succeeds and the core renders into it,
+                                            * the framebuffer pointer and pitch can be passed to retro_video_refresh_t.
+                                            * If the buffer from GET_CURRENT_SOFTWARE_FRAMEBUFFER is to be used,
+                                            * the core must pass the exact
+                                            * same pointer as returned by GET_CURRENT_SOFTWARE_FRAMEBUFFER;
+                                            * i.e. passing a pointer which is offset from the
+                                            * buffer is undefined. The width, height and pitch parameters
+                                            * must also match exactly to the values obtained from GET_CURRENT_SOFTWARE_FRAMEBUFFER.
+                                            *
+                                            * It is possible for a frontend to return a different pixel format
+                                            * than the one used in SET_PIXEL_FORMAT. This can happen if the frontend
+                                            * needs to perform conversion.
+                                            *
+                                            * It is still valid for a core to render to a different buffer
+                                            * even if GET_CURRENT_SOFTWARE_FRAMEBUFFER succeeds.
+                                            *
+                                            * A frontend must make sure that the pointer obtained from this function is
+                                            * writeable (and readable).
+                                            */
+#define RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE (41 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* const struct retro_hw_render_interface ** --
+                                            * Returns an API specific rendering interface for accessing API specific data.
+                                            * Not all HW rendering APIs support or need this.
+                                            * The contents of the returned pointer is specific to the rendering API
+                                            * being used. See the various headers like libretro_vulkan.h, etc.
+                                            *
+                                            * GET_HW_RENDER_INTERFACE cannot be called before context_reset has been called.
+                                            * Similarly, after context_destroyed callback returns,
+                                            * the contents of the HW_RENDER_INTERFACE are invalidated.
+                                            */
+#define RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS (42 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* const bool * --
+                                            * If true, the libretro implementation supports achievements
+                                            * either via memory descriptors set with RETRO_ENVIRONMENT_SET_MEMORY_MAPS
+                                            * or via retro_get_memory_data/retro_get_memory_size.
+                                            *
+                                            * This must be called before the first call to retro_run.
+                                            */
+#define RETRO_ENVIRONMENT_SET_HW_RENDER_CONTEXT_NEGOTIATION_INTERFACE (43 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* const struct retro_hw_render_context_negotiation_interface * --
+                                            * Sets an interface which lets the libretro core negotiate with frontend how a context is created.
+                                            * The semantics of this interface depends on which API is used in SET_HW_RENDER earlier.
+                                            * This interface will be used when the frontend is trying to create a HW rendering context,
+                                            * so it will be used after SET_HW_RENDER, but before the context_reset callback.
+                                            */
+#define RETRO_ENVIRONMENT_SET_SERIALIZATION_QUIRKS 44
+                                           /* uint64_t * --
+                                            * Sets quirk flags associated with serialization. The frontend will zero any flags it doesn't
+                                            * recognize or support. Should be set in either retro_init or retro_load_game, but not both.
+                                            */
+#define RETRO_ENVIRONMENT_SET_HW_SHARED_CONTEXT (44 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* N/A (null) * --
+                                            * The frontend will try to use a 'shared' hardware context (mostly applicable
+                                            * to OpenGL) when a hardware context is being set up.
+                                            *
+                                            * Returns true if the frontend supports shared hardware contexts and false
+                                            * if the frontend does not support shared hardware contexts.
+                                            *
+                                            * This will do nothing on its own until SET_HW_RENDER env callbacks are
+                                            * being used.
+                                            */
+#define RETRO_ENVIRONMENT_GET_VFS_INTERFACE (45 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* struct retro_vfs_interface_info * --
+                                            * Gets access to the VFS interface.
+                                            * VFS presence needs to be queried prior to load_game or any
+                                            * get_system/save/other_directory being called to let front end know
+                                            * core supports VFS before it starts handing out paths.
+                                            * It is recomended to do so in retro_set_environment
+                                            */
+#define RETRO_ENVIRONMENT_GET_LED_INTERFACE (46 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* struct retro_led_interface * --
+                                            * Gets an interface which is used by a libretro core to set
+                                            * state of LEDs.
+                                            */
+#define RETRO_ENVIRONMENT_GET_AUDIO_VIDEO_ENABLE (47 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* int * --
+                                            * Tells the core if the frontend wants audio or video.
+                                            * If disabled, the frontend will discard the audio or video,
+                                            * so the core may decide to skip generating a frame or generating audio.
+                                            * This is mainly used for increasing performance.
+                                            * Bit 0 (value 1): Enable Video
+                                            * Bit 1 (value 2): Enable Audio
+                                            * Bit 2 (value 4): Use Fast Savestates.
+                                            * Bit 3 (value 8): Hard Disable Audio
+                                            * Other bits are reserved for future use and will default to zero.
+                                            * If video is disabled:
+                                            * * The frontend wants the core to not generate any video,
+                                            *   including presenting frames via hardware acceleration.
+                                            * * The frontend's video frame callback will do nothing.
+                                            * * After running the frame, the video output of the next frame should be
+                                            *   no different than if video was enabled, and saving and loading state
+                                            *   should have no issues.
+                                            * If audio is disabled:
+                                            * * The frontend wants the core to not generate any audio.
+                                            * * The frontend's audio callbacks will do nothing.
+                                            * * After running the frame, the audio output of the next frame should be
+                                            *   no different than if audio was enabled, and saving and loading state
+                                            *   should have no issues.
+                                            * Fast Savestates:
+                                            * * Guaranteed to be created by the same binary that will load them.
+                                            * * Will not be written to or read from the disk.
+                                            * * Suggest that the core assumes loading state will succeed.
+                                            * * Suggest that the core updates its memory buffers in-place if possible.
+                                            * * Suggest that the core skips clearing memory.
+                                            * * Suggest that the core skips resetting the system.
+                                            * * Suggest that the core may skip validation steps.
+                                            * Hard Disable Audio:
+                                            * * Used for a secondary core when running ahead.
+                                            * * Indicates that the frontend will never need audio from the core.
+                                            * * Suggests that the core may stop synthesizing audio, but this should not
+                                            *   compromise emulation accuracy.
+                                            * * Audio output for the next frame does not matter, and the frontend will
+                                            *   never need an accurate audio state in the future.
+                                            * * State will never be saved when using Hard Disable Audio.
+                                            */
+#define RETRO_ENVIRONMENT_GET_MIDI_INTERFACE (48 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* struct retro_midi_interface ** --
+                                            * Returns a MIDI interface that can be used for raw data I/O.
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_FASTFORWARDING (49 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                            /* bool * --
+                                            * Boolean value that indicates whether or not the frontend is in
+                                            * fastforwarding mode.
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_TARGET_REFRESH_RATE (50 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                            /* float * --
+                                            * Float value that lets us know what target refresh rate
+                                            * is curently in use by the frontend.
+                                            *
+                                            * The core can use the returned value to set an ideal
+                                            * refresh rate/framerate.
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_INPUT_BITMASKS (51 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                            /* bool * --
+                                            * Boolean value that indicates whether or not the frontend supports
+                                            * input bitmasks being returned by retro_input_state_t. The advantage
+                                            * of this is that retro_input_state_t has to be only called once to
+                                            * grab all button states instead of multiple times.
+                                            *
+                                            * If it returns true, you can pass RETRO_DEVICE_ID_JOYPAD_MASK as 'id'
+                                            * to retro_input_state_t (make sure 'device' is set to RETRO_DEVICE_JOYPAD).
+                                            * It will return a bitmask of all the digital buttons.
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION 52
+                                           /* unsigned * --
+                                            * Unsigned value is the API version number of the core options
+                                            * interface supported by the frontend. If callback return false,
+                                            * API version is assumed to be 0.
+                                            *
+                                            * In legacy code, core options are set by passing an array of
+                                            * retro_variable structs to RETRO_ENVIRONMENT_SET_VARIABLES.
+                                            * This may be still be done regardless of the core options
+                                            * interface version.
+                                            *
+                                            * If version is >= 1 however, core options may instead be set by
+                                            * passing an array of retro_core_option_definition structs to
+                                            * RETRO_ENVIRONMENT_SET_CORE_OPTIONS, or a 2D array of
+                                            * retro_core_option_definition structs to RETRO_ENVIRONMENT_SET_CORE_OPTIONS_INTL.
+                                            * This allows the core to additionally set option sublabel information
+                                            * and/or provide localisation support.
+                                            *
+                                            * If version is >= 2, core options may instead be set by passing
+                                            * a retro_core_options_v2 struct to RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2,
+                                            * or an array of retro_core_options_v2 structs to
+                                            * RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2_INTL. This allows the core
+                                            * to additionally set optional core option category information
+                                            * for frontends with core option category support.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_CORE_OPTIONS 53
+                                           /* const struct retro_core_option_definition ** --
+                                            * Allows an implementation to signal the environment
+                                            * which variables it might want to check for later using
+                                            * GET_VARIABLE.
+                                            * This allows the frontend to present these variables to
+                                            * a user dynamically.
+                                            * This should only be called if RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION
+                                            * returns an API version of >= 1.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_VARIABLES.
+                                            * This should be called the first time as early as
+                                            * possible (ideally in retro_set_environment).
+                                            * Afterwards it may be called again for the core to communicate
+                                            * updated options to the frontend, but the number of core
+                                            * options must not change from the number in the initial call.
+                                            *
+                                            * 'data' points to an array of retro_core_option_definition structs
+                                            * terminated by a { NULL, NULL, NULL, {{0}}, NULL } element.
+                                            * retro_core_option_definition::key should be namespaced to not collide
+                                            * with other implementations' keys. e.g. A core called
+                                            * 'foo' should use keys named as 'foo_option'.
+                                            * retro_core_option_definition::desc should contain a human readable
+                                            * description of the key.
+                                            * retro_core_option_definition::info should contain any additional human
+                                            * readable information text that a typical user may need to
+                                            * understand the functionality of the option.
+                                            * retro_core_option_definition::values is an array of retro_core_option_value
+                                            * structs terminated by a { NULL, NULL } element.
+                                            * > retro_core_option_definition::values[index].value is an expected option
+                                            *   value.
+                                            * > retro_core_option_definition::values[index].label is a human readable
+                                            *   label used when displaying the value on screen. If NULL,
+                                            *   the value itself is used.
+                                            * retro_core_option_definition::default_value is the default core option
+                                            * setting. It must match one of the expected option values in the
+                                            * retro_core_option_definition::values array. If it does not, or the
+                                            * default value is NULL, the first entry in the
+                                            * retro_core_option_definition::values array is treated as the default.
+                                            *
+                                            * The number of possible option values should be very limited,
+                                            * and must be less than RETRO_NUM_CORE_OPTION_VALUES_MAX.
+                                            * i.e. it should be feasible to cycle through options
+                                            * without a keyboard.
+                                            *
+                                            * Example entry:
+                                            * {
+                                            *     "foo_option",
+                                            *     "Speed hack coprocessor X",
+                                            *     "Provides increased performance at the expense of reduced accuracy",
+                                            * 	  {
+                                            *         { "false",    NULL },
+                                            *         { "true",     NULL },
+                                            *         { "unstable", "Turbo (Unstable)" },
+                                            *         { NULL, NULL },
+                                            *     },
+                                            *     "false"
+                                            * }
+                                            *
+                                            * Only strings are operated on. The possible values will
+                                            * generally be displayed and stored as-is by the frontend.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_CORE_OPTIONS_INTL 54
+                                           /* const struct retro_core_options_intl * --
+                                            * Allows an implementation to signal the environment
+                                            * which variables it might want to check for later using
+                                            * GET_VARIABLE.
+                                            * This allows the frontend to present these variables to
+                                            * a user dynamically.
+                                            * This should only be called if RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION
+                                            * returns an API version of >= 1.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_VARIABLES.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_CORE_OPTIONS.
+                                            * This should be called the first time as early as
+                                            * possible (ideally in retro_set_environment).
+                                            * Afterwards it may be called again for the core to communicate
+                                            * updated options to the frontend, but the number of core
+                                            * options must not change from the number in the initial call.
+                                            *
+                                            * This is fundamentally the same as RETRO_ENVIRONMENT_SET_CORE_OPTIONS,
+                                            * with the addition of localisation support. The description of the
+                                            * RETRO_ENVIRONMENT_SET_CORE_OPTIONS callback should be consulted
+                                            * for further details.
+                                            *
+                                            * 'data' points to a retro_core_options_intl struct.
+                                            *
+                                            * retro_core_options_intl::us is a pointer to an array of
+                                            * retro_core_option_definition structs defining the US English
+                                            * core options implementation. It must point to a valid array.
+                                            *
+                                            * retro_core_options_intl::local is a pointer to an array of
+                                            * retro_core_option_definition structs defining core options for
+                                            * the current frontend language. It may be NULL (in which case
+                                            * retro_core_options_intl::us is used by the frontend). Any items
+                                            * missing from this array will be read from retro_core_options_intl::us
+                                            * instead.
+                                            *
+                                            * NOTE: Default core option values are always taken from the
+                                            * retro_core_options_intl::us array. Any default values in
+                                            * retro_core_options_intl::local array will be ignored.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_CORE_OPTIONS_DISPLAY 55
+                                           /* struct retro_core_option_display * --
+                                            *
+                                            * Allows an implementation to signal the environment to show
+                                            * or hide a variable when displaying core options. This is
+                                            * considered a *suggestion*. The frontend is free to ignore
+                                            * this callback, and its implementation not considered mandatory.
+                                            *
+                                            * 'data' points to a retro_core_option_display struct
+                                            *
+                                            * retro_core_option_display::key is a variable identifier
+                                            * which has already been set by SET_VARIABLES/SET_CORE_OPTIONS.
+                                            *
+                                            * retro_core_option_display::visible is a boolean, specifying
+                                            * whether variable should be displayed
+                                            *
+                                            * Note that all core option variables will be set visible by
+                                            * default when calling SET_VARIABLES/SET_CORE_OPTIONS.
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_PREFERRED_HW_RENDER 56
+                                           /* unsigned * --
+                                            *
+                                            * Allows an implementation to ask frontend preferred hardware
+                                            * context to use. Core should use this information to deal
+                                            * with what specific context to request with SET_HW_RENDER.
+                                            *
+                                            * 'data' points to an unsigned variable
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_DISK_CONTROL_INTERFACE_VERSION 57
+                                           /* unsigned * --
+                                            * Unsigned value is the API version number of the disk control
+                                            * interface supported by the frontend. If callback return false,
+                                            * API version is assumed to be 0.
+                                            *
+                                            * In legacy code, the disk control interface is defined by passing
+                                            * a struct of type retro_disk_control_callback to
+                                            * RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE.
+                                            * This may be still be done regardless of the disk control
+                                            * interface version.
+                                            *
+                                            * If version is >= 1 however, the disk control interface may
+                                            * instead be defined by passing a struct of type
+                                            * retro_disk_control_ext_callback to
+                                            * RETRO_ENVIRONMENT_SET_DISK_CONTROL_EXT_INTERFACE.
+                                            * This allows the core to provide additional information about
+                                            * disk images to the frontend and/or enables extra
+                                            * disk control functionality by the frontend.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_DISK_CONTROL_EXT_INTERFACE 58
+                                           /* const struct retro_disk_control_ext_callback * --
+                                            * Sets an interface which frontend can use to eject and insert
+                                            * disk images, and also obtain information about individual
+                                            * disk image files registered by the core.
+                                            * This is used for games which consist of multiple images and
+                                            * must be manually swapped out by the user (e.g. PSX, floppy disk
+                                            * based systems).
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_MESSAGE_INTERFACE_VERSION 59
+                                           /* unsigned * --
+                                            * Unsigned value is the API version number of the message
+                                            * interface supported by the frontend. If callback returns
+                                            * false, API version is assumed to be 0.
+                                            *
+                                            * In legacy code, messages may be displayed in an
+                                            * implementation-specific manner by passing a struct
+                                            * of type retro_message to RETRO_ENVIRONMENT_SET_MESSAGE.
+                                            * This may be still be done regardless of the message
+                                            * interface version.
+                                            *
+                                            * If version is >= 1 however, messages may instead be
+                                            * displayed by passing a struct of type retro_message_ext
+                                            * to RETRO_ENVIRONMENT_SET_MESSAGE_EXT. This allows the
+                                            * core to specify message logging level, priority and
+                                            * destination (OSD, logging interface or both).
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_MESSAGE_EXT 60
+                                           /* const struct retro_message_ext * --
+                                            * Sets a message to be displayed in an implementation-specific
+                                            * manner for a certain amount of 'frames'. Additionally allows
+                                            * the core to specify message logging level, priority and
+                                            * destination (OSD, logging interface or both).
+                                            * Should not be used for trivial messages, which should simply be
+                                            * logged via RETRO_ENVIRONMENT_GET_LOG_INTERFACE (or as a
+                                            * fallback, stderr).
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_INPUT_MAX_USERS 61
+                                           /* unsigned * --
+                                            * Unsigned value is the number of active input devices
+                                            * provided by the frontend. This may change between
+                                            * frames, but will remain constant for the duration
+                                            * of each frame.
+                                            * If callback returns true, a core need not poll any
+                                            * input device with an index greater than or equal to
+                                            * the number of active devices.
+                                            * If callback returns false, the number of active input
+                                            * devices is unknown. In this case, all input devices
+                                            * should be considered active.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK 62
+                                           /* const struct retro_audio_buffer_status_callback * --
+                                            * Lets the core know the occupancy level of the frontend
+                                            * audio buffer. Can be used by a core to attempt frame
+                                            * skipping in order to avoid buffer under-runs.
+                                            * A core may pass NULL to disable buffer status reporting
+                                            * in the frontend.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY 63
+                                           /* const unsigned * --
+                                            * Sets minimum frontend audio latency in milliseconds.
+                                            * Resultant audio latency may be larger than set value,
+                                            * or smaller if a hardware limit is encountered. A frontend
+                                            * is expected to honour requests up to 512 ms.
+                                            *
+                                            * - If value is less than current frontend
+                                            *   audio latency, callback has no effect
+                                            * - If value is zero, default frontend audio
+                                            *   latency is set
+                                            *
+                                            * May be used by a core to increase audio latency and
+                                            * therefore decrease the probability of buffer under-runs
+                                            * (crackling) when performing 'intensive' operations.
+                                            * A core utilising RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK
+                                            * to implement audio-buffer-based frame skipping may achieve
+                                            * optimal results by setting the audio latency to a 'high'
+                                            * (typically 6x or 8x) integer multiple of the expected
+                                            * frame time.
+                                            *
+                                            * WARNING: This can only be called from within retro_run().
+                                            * Calling this can require a full reinitialization of audio
+                                            * drivers in the frontend, so it is important to call it very
+                                            * sparingly, and usually only with the users explicit consent.
+                                            * An eventual driver reinitialize will happen so that audio
+                                            * callbacks happening after this call within the same retro_run()
+                                            * call will target the newly initialized driver.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_FASTFORWARDING_OVERRIDE 64
+                                           /* const struct retro_fastforwarding_override * --
+                                            * Used by a libretro core to override the current
+                                            * fastforwarding mode of the frontend.
+                                            * If NULL is passed to this function, the frontend
+                                            * will return true if fastforwarding override
+                                            * functionality is supported (no change in
+                                            * fastforwarding state will occur in this case).
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_CONTENT_INFO_OVERRIDE 65
+                                           /* const struct retro_system_content_info_override * --
+                                            * Allows an implementation to override 'global' content
+                                            * info parameters reported by retro_get_system_info().
+                                            * Overrides also affect subsystem content info parameters
+                                            * set via RETRO_ENVIRONMENT_SET_SUBSYSTEM_INFO.
+                                            * This function must be called inside retro_set_environment().
+                                            * If callback returns false, content info overrides
+                                            * are unsupported by the frontend, and will be ignored.
+                                            * If callback returns true, extended game info may be
+                                            * retrieved by calling RETRO_ENVIRONMENT_GET_GAME_INFO_EXT
+                                            * in retro_load_game() or retro_load_game_special().
+                                            *
+                                            * 'data' points to an array of retro_system_content_info_override
+                                            * structs terminated by a { NULL, false, false } element.
+                                            * If 'data' is NULL, no changes will be made to the frontend;
+                                            * a core may therefore pass NULL in order to test whether
+                                            * the RETRO_ENVIRONMENT_SET_CONTENT_INFO_OVERRIDE and
+                                            * RETRO_ENVIRONMENT_GET_GAME_INFO_EXT callbacks are supported
+                                            * by the frontend.
+                                            *
+                                            * For struct member descriptions, see the definition of
+                                            * struct retro_system_content_info_override.
+                                            *
+                                            * Example:
+                                            *
+                                            * - struct retro_system_info:
+                                            * {
+                                            *    "My Core",                      // library_name
+                                            *    "v1.0",                         // library_version
+                                            *    "m3u|md|cue|iso|chd|sms|gg|sg", // valid_extensions
+                                            *    true,                           // need_fullpath
+                                            *    false                           // block_extract
+                                            * }
+                                            *
+                                            * - Array of struct retro_system_content_info_override:
+                                            * {
+                                            *    {
+                                            *       "md|sms|gg", // extensions
+                                            *       false,       // need_fullpath
+                                            *       true         // persistent_data
+                                            *    },
+                                            *    {
+                                            *       "sg",        // extensions
+                                            *       false,       // need_fullpath
+                                            *       false        // persistent_data
+                                            *    },
+                                            *    { NULL, false, false }
+                                            * }
+                                            *
+                                            * Result:
+                                            * - Files of type m3u, cue, iso, chd will not be
+                                            *   loaded by the frontend. Frontend will pass a
+                                            *   valid path to the core, and core will handle
+                                            *   loading internally
+                                            * - Files of type md, sms, gg will be loaded by
+                                            *   the frontend. A valid memory buffer will be
+                                            *   passed to the core. This memory buffer will
+                                            *   remain valid until retro_deinit() returns
+                                            * - Files of type sg will be loaded by the frontend.
+                                            *   A valid memory buffer will be passed to the core.
+                                            *   This memory buffer will remain valid until
+                                            *   retro_load_game() (or retro_load_game_special())
+                                            *   returns
+                                            *
+                                            * NOTE: If an extension is listed multiple times in
+                                            * an array of retro_system_content_info_override
+                                            * structs, only the first instance will be registered
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_GAME_INFO_EXT 66
+                                           /* const struct retro_game_info_ext ** --
+                                            * Allows an implementation to fetch extended game
+                                            * information, providing additional content path
+                                            * and memory buffer status details.
+                                            * This function may only be called inside
+                                            * retro_load_game() or retro_load_game_special().
+                                            * If callback returns false, extended game information
+                                            * is unsupported by the frontend. In this case, only
+                                            * regular retro_game_info will be available.
+                                            * RETRO_ENVIRONMENT_GET_GAME_INFO_EXT is guaranteed
+                                            * to return true if RETRO_ENVIRONMENT_SET_CONTENT_INFO_OVERRIDE
+                                            * returns true.
+                                            *
+                                            * 'data' points to an array of retro_game_info_ext structs.
+                                            *
+                                            * For struct member descriptions, see the definition of
+                                            * struct retro_game_info_ext.
+                                            *
+                                            * - If function is called inside retro_load_game(),
+                                            *   the retro_game_info_ext array is guaranteed to
+                                            *   have a size of 1 - i.e. the returned pointer may
+                                            *   be used to access directly the members of the
+                                            *   first retro_game_info_ext struct, for example:
+                                            *
+                                            *      struct retro_game_info_ext *game_info_ext;
+                                            *      if (environ_cb(RETRO_ENVIRONMENT_GET_GAME_INFO_EXT, &game_info_ext))
+                                            *         printf("Content Directory: %s\n", game_info_ext->dir);
+                                            *
+                                            * - If the function is called inside retro_load_game_special(),
+                                            *   the retro_game_info_ext array is guaranteed to have a
+                                            *   size equal to the num_info argument passed to
+                                            *   retro_load_game_special()
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2 67
+                                           /* const struct retro_core_options_v2 * --
+                                            * Allows an implementation to signal the environment
+                                            * which variables it might want to check for later using
+                                            * GET_VARIABLE.
+                                            * This allows the frontend to present these variables to
+                                            * a user dynamically.
+                                            * This should only be called if RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION
+                                            * returns an API version of >= 2.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_VARIABLES.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_CORE_OPTIONS.
+                                            * This should be called the first time as early as
+                                            * possible (ideally in retro_set_environment).
+                                            * Afterwards it may be called again for the core to communicate
+                                            * updated options to the frontend, but the number of core
+                                            * options must not change from the number in the initial call.
+                                            * If RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION returns an API
+                                            * version of >= 2, this callback is guaranteed to succeed
+                                            * (i.e. callback return value does not indicate success)
+                                            * If callback returns true, frontend has core option category
+                                            * support.
+                                            * If callback returns false, frontend does not have core option
+                                            * category support.
+                                            *
+                                            * 'data' points to a retro_core_options_v2 struct, containing
+                                            * of two pointers:
+                                            * - retro_core_options_v2::categories is an array of
+                                            *   retro_core_option_v2_category structs terminated by a
+                                            *   { NULL, NULL, NULL } element. If retro_core_options_v2::categories
+                                            *   is NULL, all core options will have no category and will be shown
+                                            *   at the top level of the frontend core option interface. If frontend
+                                            *   does not have core option category support, categories array will
+                                            *   be ignored.
+                                            * - retro_core_options_v2::definitions is an array of
+                                            *   retro_core_option_v2_definition structs terminated by a
+                                            *   { NULL, NULL, NULL, NULL, NULL, NULL, {{0}}, NULL }
+                                            *   element.
+                                            *
+                                            * >> retro_core_option_v2_category notes:
+                                            *
+                                            * - retro_core_option_v2_category::key should contain string
+                                            *   that uniquely identifies the core option category. Valid
+                                            *   key characters are [a-z, A-Z, 0-9, _, -]
+                                            *   Namespace collisions with other implementations' category
+                                            *   keys are permitted.
+                                            * - retro_core_option_v2_category::desc should contain a human
+                                            *   readable description of the category key.
+                                            * - retro_core_option_v2_category::info should contain any
+                                            *   additional human readable information text that a typical
+                                            *   user may need to understand the nature of the core option
+                                            *   category.
+                                            *
+                                            * Example entry:
+                                            * {
+                                            *     "advanced_settings",
+                                            *     "Advanced",
+                                            *     "Options affecting low-level emulation performance and accuracy."
+                                            * }
+                                            *
+                                            * >> retro_core_option_v2_definition notes:
+                                            *
+                                            * - retro_core_option_v2_definition::key should be namespaced to not
+                                            *   collide with other implementations' keys. e.g. A core called
+                                            *   'foo' should use keys named as 'foo_option'. Valid key characters
+                                            *   are [a-z, A-Z, 0-9, _, -].
+                                            * - retro_core_option_v2_definition::desc should contain a human readable
+                                            *   description of the key. Will be used when the frontend does not
+                                            *   have core option category support. Examples: "Aspect Ratio" or
+                                            *   "Video > Aspect Ratio".
+                                            * - retro_core_option_v2_definition::desc_categorized should contain a
+                                            *   human readable description of the key, which will be used when
+                                            *   frontend has core option category support. Example: "Aspect Ratio",
+                                            *   where associated retro_core_option_v2_category::desc is "Video".
+                                            *   If empty or NULL, the string specified by
+                                            *   retro_core_option_v2_definition::desc will be used instead.
+                                            *   retro_core_option_v2_definition::desc_categorized will be ignored
+                                            *   if retro_core_option_v2_definition::category_key is empty or NULL.
+                                            * - retro_core_option_v2_definition::info should contain any additional
+                                            *   human readable information text that a typical user may need to
+                                            *   understand the functionality of the option.
+                                            * - retro_core_option_v2_definition::info_categorized should contain
+                                            *   any additional human readable information text that a typical user
+                                            *   may need to understand the functionality of the option, and will be
+                                            *   used when frontend has core option category support. This is provided
+                                            *   to accommodate the case where info text references an option by
+                                            *   name/desc, and the desc/desc_categorized text for that option differ.
+                                            *   If empty or NULL, the string specified by
+                                            *   retro_core_option_v2_definition::info will be used instead.
+                                            *   retro_core_option_v2_definition::info_categorized will be ignored
+                                            *   if retro_core_option_v2_definition::category_key is empty or NULL.
+                                            * - retro_core_option_v2_definition::category_key should contain a
+                                            *   category identifier (e.g. "video" or "audio") that will be
+                                            *   assigned to the core option if frontend has core option category
+                                            *   support. A categorized option will be shown in a subsection/
+                                            *   submenu of the frontend core option interface. If key is empty
+                                            *   or NULL, or if key does not match one of the
+                                            *   retro_core_option_v2_category::key values in the associated
+                                            *   retro_core_option_v2_category array, option will have no category
+                                            *   and will be shown at the top level of the frontend core option
+                                            *   interface.
+                                            * - retro_core_option_v2_definition::values is an array of
+                                            *   retro_core_option_value structs terminated by a { NULL, NULL }
+                                            *   element.
+                                            * --> retro_core_option_v2_definition::values[index].value is an
+                                            *     expected option value.
+                                            * --> retro_core_option_v2_definition::values[index].label is a
+                                            *     human readable label used when displaying the value on screen.
+                                            *     If NULL, the value itself is used.
+                                            * - retro_core_option_v2_definition::default_value is the default
+                                            *   core option setting. It must match one of the expected option
+                                            *   values in the retro_core_option_v2_definition::values array. If
+                                            *   it does not, or the default value is NULL, the first entry in the
+                                            *   retro_core_option_v2_definition::values array is treated as the
+                                            *   default.
+                                            *
+                                            * The number of possible option values should be very limited,
+                                            * and must be less than RETRO_NUM_CORE_OPTION_VALUES_MAX.
+                                            * i.e. it should be feasible to cycle through options
+                                            * without a keyboard.
+                                            *
+                                            * Example entries:
+                                            *
+                                            * - Uncategorized:
+                                            *
+                                            * {
+                                            *     "foo_option",
+                                            *     "Speed hack coprocessor X",
+                                            *     NULL,
+                                            *     "Provides increased performance at the expense of reduced accuracy.",
+                                            *     NULL,
+                                            *     NULL,
+                                            * 	  {
+                                            *         { "false",    NULL },
+                                            *         { "true",     NULL },
+                                            *         { "unstable", "Turbo (Unstable)" },
+                                            *         { NULL, NULL },
+                                            *     },
+                                            *     "false"
+                                            * }
+                                            *
+                                            * - Categorized:
+                                            *
+                                            * {
+                                            *     "foo_option",
+                                            *     "Advanced > Speed hack coprocessor X",
+                                            *     "Speed hack coprocessor X",
+                                            *     "Setting 'Advanced > Speed hack coprocessor X' to 'true' or 'Turbo' provides increased performance at the expense of reduced accuracy",
+                                            *     "Setting 'Speed hack coprocessor X' to 'true' or 'Turbo' provides increased performance at the expense of reduced accuracy",
+                                            *     "advanced_settings",
+                                            * 	  {
+                                            *         { "false",    NULL },
+                                            *         { "true",     NULL },
+                                            *         { "unstable", "Turbo (Unstable)" },
+                                            *         { NULL, NULL },
+                                            *     },
+                                            *     "false"
+                                            * }
+                                            *
+                                            * Only strings are operated on. The possible values will
+                                            * generally be displayed and stored as-is by the frontend.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2_INTL 68
+                                           /* const struct retro_core_options_v2_intl * --
+                                            * Allows an implementation to signal the environment
+                                            * which variables it might want to check for later using
+                                            * GET_VARIABLE.
+                                            * This allows the frontend to present these variables to
+                                            * a user dynamically.
+                                            * This should only be called if RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION
+                                            * returns an API version of >= 2.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_VARIABLES.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_CORE_OPTIONS.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_CORE_OPTIONS_INTL.
+                                            * This should be called instead of RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2.
+                                            * This should be called the first time as early as
+                                            * possible (ideally in retro_set_environment).
+                                            * Afterwards it may be called again for the core to communicate
+                                            * updated options to the frontend, but the number of core
+                                            * options must not change from the number in the initial call.
+                                            * If RETRO_ENVIRONMENT_GET_CORE_OPTIONS_VERSION returns an API
+                                            * version of >= 2, this callback is guaranteed to succeed
+                                            * (i.e. callback return value does not indicate success)
+                                            * If callback returns true, frontend has core option category
+                                            * support.
+                                            * If callback returns false, frontend does not have core option
+                                            * category support.
+                                            *
+                                            * This is fundamentally the same as RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2,
+                                            * with the addition of localisation support. The description of the
+                                            * RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2 callback should be consulted
+                                            * for further details.
+                                            *
+                                            * 'data' points to a retro_core_options_v2_intl struct.
+                                            *
+                                            * - retro_core_options_v2_intl::us is a pointer to a
+                                            *   retro_core_options_v2 struct defining the US English
+                                            *   core options implementation. It must point to a valid struct.
+                                            *
+                                            * - retro_core_options_v2_intl::local is a pointer to a
+                                            *   retro_core_options_v2 struct defining core options for
+                                            *   the current frontend language. It may be NULL (in which case
+                                            *   retro_core_options_v2_intl::us is used by the frontend). Any items
+                                            *   missing from this struct will be read from
+                                            *   retro_core_options_v2_intl::us instead.
+                                            *
+                                            * NOTE: Default core option values are always taken from the
+                                            * retro_core_options_v2_intl::us struct. Any default values in
+                                            * the retro_core_options_v2_intl::local struct will be ignored.
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_CORE_OPTIONS_UPDATE_DISPLAY_CALLBACK 69
+                                           /* const struct retro_core_options_update_display_callback * --
+                                            * Allows a frontend to signal that a core must update
+                                            * the visibility of any dynamically hidden core options,
+                                            * and enables the frontend to detect visibility changes.
+                                            * Used by the frontend to update the menu display status
+                                            * of core options without requiring a call of retro_run().
+                                            * Must be called in retro_set_environment().
+                                            */
+
+#define RETRO_ENVIRONMENT_SET_VARIABLE 70
+                                           /* const struct retro_variable * --
+                                            * Allows an implementation to notify the frontend
+                                            * that a core option value has changed.
+                                            *
+                                            * retro_variable::key and retro_variable::value
+                                            * must match strings that have been set previously
+                                            * via one of the following:
+                                            *
+                                            * - RETRO_ENVIRONMENT_SET_VARIABLES
+                                            * - RETRO_ENVIRONMENT_SET_CORE_OPTIONS
+                                            * - RETRO_ENVIRONMENT_SET_CORE_OPTIONS_INTL
+                                            * - RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2
+                                            * - RETRO_ENVIRONMENT_SET_CORE_OPTIONS_V2_INTL
+                                            *
+                                            * After changing a core option value via this
+                                            * callback, RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE
+                                            * will return true.
+                                            *
+                                            * If data is NULL, no changes will be registered
+                                            * and the callback will return true; an
+                                            * implementation may therefore pass NULL in order
+                                            * to test whether the callback is supported.
+                                            */
+
+#define RETRO_ENVIRONMENT_GET_THROTTLE_STATE (71 | RETRO_ENVIRONMENT_EXPERIMENTAL)
+                                           /* struct retro_throttle_state * --
+                                            * Allows an implementation to get details on the actual rate
+                                            * the frontend is attempting to call retro_run().
+                                            */
+
+/* VFS functionality */
+
+/* File paths:
+ * File paths passed as parameters when using this API shall be well formed UNIX-style,
+ * using "/" (unquoted forward slash) as directory separator regardless of the platform's native separator.
+ * Paths shall also include at least one forward slash ("game.bin" is an invalid path, use "./game.bin" instead).
+ * Other than the directory separator, cores shall not make assumptions about path format:
+ * "C:/path/game.bin", "http://example.com/game.bin", "#game/game.bin", "./game.bin" (without quotes) are all valid paths.
+ * Cores may replace the basename or remove path components from the end, and/or add new components;
+ * however, cores shall not append "./", "../" or multiple consecutive forward slashes ("//") to paths they request to front end.
+ * The frontend is encouraged to make such paths work as well as it can, but is allowed to give up if the core alters paths too much.
+ * Frontends are encouraged, but not required, to support native file system paths (modulo replacing the directory separator, if applicable).
+ * Cores are allowed to try using them, but must remain functional if the front rejects such requests.
+ * Cores are encouraged to use the libretro-common filestream functions for file I/O,
+ * as they seamlessly integrate with VFS, deal with directory separator replacement as appropriate
+ * and provide platform-specific fallbacks in cases where front ends do not support VFS. */
+
+/* Opaque file handle
+ * Introduced in VFS API v1 */
+struct retro_vfs_file_handle;
+
+/* Opaque directory handle
+ * Introduced in VFS API v3 */
+struct retro_vfs_dir_handle;
+
+/* File open flags
+ * Introduced in VFS API v1 */
+#define RETRO_VFS_FILE_ACCESS_READ            (1 << 0) /* Read only mode */
+#define RETRO_VFS_FILE_ACCESS_WRITE           (1 << 1) /* Write only mode, discard contents and overwrites existing file unless RETRO_VFS_FILE_ACCESS_UPDATE is also specified */
+#define RETRO_VFS_FILE_ACCESS_READ_WRITE      (RETRO_VFS_FILE_ACCESS_READ | RETRO_VFS_FILE_ACCESS_WRITE) /* Read-write mode, discard contents and overwrites existing file unless RETRO_VFS_FILE_ACCESS_UPDATE is also specified*/
+#define RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING (1 << 2) /* Prevents discarding content of existing files opened for writing */
+
+/* These are only hints. The frontend may choose to ignore them. Other than RAM/CPU/etc use,
+   and how they react to unlikely external interference (for example someone else writing to that file,
+   or the file's server going down), behavior will not change. */
+#define RETRO_VFS_FILE_ACCESS_HINT_NONE              (0)
+/* Indicate that the file will be accessed many times. The frontend should aggressively cache everything. */
+#define RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS   (1 << 0)
+
+/* Seek positions */
+#define RETRO_VFS_SEEK_POSITION_START    0
+#define RETRO_VFS_SEEK_POSITION_CURRENT  1
+#define RETRO_VFS_SEEK_POSITION_END      2
+
+/* stat() result flags
+ * Introduced in VFS API v3 */
+#define RETRO_VFS_STAT_IS_VALID               (1 << 0)
+#define RETRO_VFS_STAT_IS_DIRECTORY           (1 << 1)
+#define RETRO_VFS_STAT_IS_CHARACTER_SPECIAL   (1 << 2)
+
+/* Get path from opaque handle. Returns the exact same path passed to file_open when getting the handle
+ * Introduced in VFS API v1 */
+typedef const char *(RETRO_CALLCONV *retro_vfs_get_path_t)(struct retro_vfs_file_handle *stream);
+
+/* Open a file for reading or writing. If path points to a directory, this will
+ * fail. Returns the opaque file handle, or NULL for error.
+ * Introduced in VFS API v1 */
+typedef struct retro_vfs_file_handle *(RETRO_CALLCONV *retro_vfs_open_t)(const char *path, unsigned mode, unsigned hints);
+
+/* Close the file and release its resources. Must be called if open_file returns non-NULL. Returns 0 on success, -1 on failure.
+ * Whether the call succeeds ot not, the handle passed as parameter becomes invalid and should no longer be used.
+ * Introduced in VFS API v1 */
+typedef int (RETRO_CALLCONV *retro_vfs_close_t)(struct retro_vfs_file_handle *stream);
+
+/* Return the size of the file in bytes, or -1 for error.
+ * Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_size_t)(struct retro_vfs_file_handle *stream);
+
+/* Truncate file to specified size. Returns 0 on success or -1 on error
+ * Introduced in VFS API v2 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_truncate_t)(struct retro_vfs_file_handle *stream, int64_t length);
+
+/* Get the current read / write position for the file. Returns -1 for error.
+ * Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_tell_t)(struct retro_vfs_file_handle *stream);
+
+/* Set the current read/write position for the file. Returns the new position, -1 for error.
+ * Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_seek_t)(struct retro_vfs_file_handle *stream, int64_t offset, int seek_position);
+
+/* Read data from a file. Returns the number of bytes read, or -1 for error.
+ * Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_read_t)(struct retro_vfs_file_handle *stream, void *s, uint64_t len);
+
+/* Write data to a file. Returns the number of bytes written, or -1 for error.
+ * Introduced in VFS API v1 */
+typedef int64_t (RETRO_CALLCONV *retro_vfs_write_t)(struct retro_vfs_file_handle *stream, const void *s, uint64_t len);
+
+/* Flush pending writes to file, if using buffered IO. Returns 0 on sucess, or -1 on failure.
+ * Introduced in VFS API v1 */
+typedef int (RETRO_CALLCONV *retro_vfs_flush_t)(struct retro_vfs_file_handle *stream);
+
+/* Delete the specified file. Returns 0 on success, -1 on failure
+ * Introduced in VFS API v1 */
+typedef int (RETRO_CALLCONV *retro_vfs_remove_t)(const char *path);
+
+/* Rename the specified file. Returns 0 on success, -1 on failure
+ * Introduced in VFS API v1 */
+typedef int (RETRO_CALLCONV *retro_vfs_rename_t)(const char *old_path, const char *new_path);
+
+/* Stat the specified file. Retruns a bitmask of RETRO_VFS_STAT_* flags, none are set if path was not valid.
+ * Additionally stores file size in given variable, unless NULL is given.
+ * Introduced in VFS API v3 */
+typedef int (RETRO_CALLCONV *retro_vfs_stat_t)(const char *path, int32_t *size);
+
+/* Create the specified directory. Returns 0 on success, -1 on unknown failure, -2 if already exists.
+ * Introduced in VFS API v3 */
+typedef int (RETRO_CALLCONV *retro_vfs_mkdir_t)(const char *dir);
+
+/* Open the specified directory for listing. Returns the opaque dir handle, or NULL for error.
+ * Support for the include_hidden argument may vary depending on the platform.
+ * Introduced in VFS API v3 */
+typedef struct retro_vfs_dir_handle *(RETRO_CALLCONV *retro_vfs_opendir_t)(const char *dir, bool include_hidden);
+
+/* Read the directory entry at the current position, and move the read pointer to the next position.
+ * Returns true on success, false if already on the last entry.
+ * Introduced in VFS API v3 */
+typedef bool (RETRO_CALLCONV *retro_vfs_readdir_t)(struct retro_vfs_dir_handle *dirstream);
+
+/* Get the name of the last entry read. Returns a string on success, or NULL for error.
+ * The returned string pointer is valid until the next call to readdir or closedir.
+ * Introduced in VFS API v3 */
+typedef const char *(RETRO_CALLCONV *retro_vfs_dirent_get_name_t)(struct retro_vfs_dir_handle *dirstream);
+
+/* Check if the last entry read was a directory. Returns true if it was, false otherwise (or on error).
+ * Introduced in VFS API v3 */
+typedef bool (RETRO_CALLCONV *retro_vfs_dirent_is_dir_t)(struct retro_vfs_dir_handle *dirstream);
+
+/* Close the directory and release its resources. Must be called if opendir returns non-NULL. Returns 0 on success, -1 on failure.
+ * Whether the call succeeds ot not, the handle passed as parameter becomes invalid and should no longer be used.
+ * Introduced in VFS API v3 */
+typedef int (RETRO_CALLCONV *retro_vfs_closedir_t)(struct retro_vfs_dir_handle *dirstream);
+
+struct retro_vfs_interface
+{
+   /* VFS API v1 */
+	retro_vfs_get_path_t get_path;
+	retro_vfs_open_t open;
+	retro_vfs_close_t close;
+	retro_vfs_size_t size;
+	retro_vfs_tell_t tell;
+	retro_vfs_seek_t seek;
+	retro_vfs_read_t read;
+	retro_vfs_write_t write;
+	retro_vfs_flush_t flush;
+	retro_vfs_remove_t remove;
+	retro_vfs_rename_t rename;
+   /* VFS API v2 */
+   retro_vfs_truncate_t truncate;
+   /* VFS API v3 */
+   retro_vfs_stat_t stat;
+   retro_vfs_mkdir_t mkdir;
+   retro_vfs_opendir_t opendir;
+   retro_vfs_readdir_t readdir;
+   retro_vfs_dirent_get_name_t dirent_get_name;
+   retro_vfs_dirent_is_dir_t dirent_is_dir;
+   retro_vfs_closedir_t closedir;
+};
+
+struct retro_vfs_interface_info
+{
+   /* Set by core: should this be higher than the version the front end supports,
+    * front end will return false in the RETRO_ENVIRONMENT_GET_VFS_INTERFACE call
+    * Introduced in VFS API v1 */
+   uint32_t required_interface_version;
+
+   /* Frontend writes interface pointer here. The frontend also sets the actual
+    * version, must be at least required_interface_version.
+    * Introduced in VFS API v1 */
+   struct retro_vfs_interface *iface;
+};
+
+enum retro_hw_render_interface_type
+{
+	RETRO_HW_RENDER_INTERFACE_VULKAN = 0,
+	RETRO_HW_RENDER_INTERFACE_D3D9   = 1,
+	RETRO_HW_RENDER_INTERFACE_D3D10  = 2,
+	RETRO_HW_RENDER_INTERFACE_D3D11  = 3,
+	RETRO_HW_RENDER_INTERFACE_D3D12  = 4,
+   RETRO_HW_RENDER_INTERFACE_GSKIT_PS2  = 5,
+   RETRO_HW_RENDER_INTERFACE_DUMMY  = INT_MAX
+};
+
+/* Base struct. All retro_hw_render_interface_* types
+ * contain at least these fields. */
+struct retro_hw_render_interface
+{
+   enum retro_hw_render_interface_type interface_type;
+   unsigned interface_version;
+};
+
+typedef void (RETRO_CALLCONV *retro_set_led_state_t)(int led, int state);
+struct retro_led_interface
+{
+    retro_set_led_state_t set_led_state;
+};
+
+/* Retrieves the current state of the MIDI input.
+ * Returns true if it's enabled, false otherwise. */
+typedef bool (RETRO_CALLCONV *retro_midi_input_enabled_t)(void);
+
+/* Retrieves the current state of the MIDI output.
+ * Returns true if it's enabled, false otherwise */
+typedef bool (RETRO_CALLCONV *retro_midi_output_enabled_t)(void);
+
+/* Reads next byte from the input stream.
+ * Returns true if byte is read, false otherwise. */
+typedef bool (RETRO_CALLCONV *retro_midi_read_t)(uint8_t *byte);
+
+/* Writes byte to the output stream.
+ * 'delta_time' is in microseconds and represent time elapsed since previous write.
+ * Returns true if byte is written, false otherwise. */
+typedef bool (RETRO_CALLCONV *retro_midi_write_t)(uint8_t byte, uint32_t delta_time);
+
+/* Flushes previously written data.
+ * Returns true if successful, false otherwise. */
+typedef bool (RETRO_CALLCONV *retro_midi_flush_t)(void);
+
+struct retro_midi_interface
+{
+   retro_midi_input_enabled_t input_enabled;
+   retro_midi_output_enabled_t output_enabled;
+   retro_midi_read_t read;
+   retro_midi_write_t write;
+   retro_midi_flush_t flush;
+};
+
+enum retro_hw_render_context_negotiation_interface_type
+{
+   RETRO_HW_RENDER_CONTEXT_NEGOTIATION_INTERFACE_VULKAN = 0,
+   RETRO_HW_RENDER_CONTEXT_NEGOTIATION_INTERFACE_DUMMY = INT_MAX
+};
+
+/* Base struct. All retro_hw_render_context_negotiation_interface_* types
+ * contain at least these fields. */
+struct retro_hw_render_context_negotiation_interface
+{
+   enum retro_hw_render_context_negotiation_interface_type interface_type;
+   unsigned interface_version;
+};
+
+/* Serialized state is incomplete in some way. Set if serialization is
+ * usable in typical end-user cases but should not be relied upon to
+ * implement frame-sensitive frontend features such as netplay or
+ * rerecording. */
+#define RETRO_SERIALIZATION_QUIRK_INCOMPLETE (1 << 0)
+/* The core must spend some time initializing before serialization is
+ * supported. retro_serialize() will initially fail; retro_unserialize()
+ * and retro_serialize_size() may or may not work correctly either. */
+#define RETRO_SERIALIZATION_QUIRK_MUST_INITIALIZE (1 << 1)
+/* Serialization size may change within a session. */
+#define RETRO_SERIALIZATION_QUIRK_CORE_VARIABLE_SIZE (1 << 2)
+/* Set by the frontend to acknowledge that it supports variable-sized
+ * states. */
+#define RETRO_SERIALIZATION_QUIRK_FRONT_VARIABLE_SIZE (1 << 3)
+/* Serialized state can only be loaded during the same session. */
+#define RETRO_SERIALIZATION_QUIRK_SINGLE_SESSION (1 << 4)
+/* Serialized state cannot be loaded on an architecture with a different
+ * endianness from the one it was saved on. */
+#define RETRO_SERIALIZATION_QUIRK_ENDIAN_DEPENDENT (1 << 5)
+/* Serialized state cannot be loaded on a different platform from the one it
+ * was saved on for reasons other than endianness, such as word size
+ * dependence */
+#define RETRO_SERIALIZATION_QUIRK_PLATFORM_DEPENDENT (1 << 6)
+
+#define RETRO_MEMDESC_CONST      (1 << 0)   /* The frontend will never change this memory area once retro_load_game has returned. */
+#define RETRO_MEMDESC_BIGENDIAN  (1 << 1)   /* The memory area contains big endian data. Default is little endian. */
+#define RETRO_MEMDESC_SYSTEM_RAM (1 << 2)   /* The memory area is system RAM.  This is main RAM of the gaming system. */
+#define RETRO_MEMDESC_SAVE_RAM   (1 << 3)   /* The memory area is save RAM. This RAM is usually found on a game cartridge, backed up by a battery. */
+#define RETRO_MEMDESC_VIDEO_RAM  (1 << 4)   /* The memory area is video RAM (VRAM) */
+#define RETRO_MEMDESC_ALIGN_2    (1 << 16)  /* All memory access in this area is aligned to their own size, or 2, whichever is smaller. */
+#define RETRO_MEMDESC_ALIGN_4    (2 << 16)
+#define RETRO_MEMDESC_ALIGN_8    (3 << 16)
+#define RETRO_MEMDESC_MINSIZE_2  (1 << 24)  /* All memory in this region is accessed at least 2 bytes at the time. */
+#define RETRO_MEMDESC_MINSIZE_4  (2 << 24)
+#define RETRO_MEMDESC_MINSIZE_8  (3 << 24)
+struct retro_memory_descriptor
+{
+   uint64_t flags;
+
+   /* Pointer to the start of the relevant ROM or RAM chip.
+    * It's strongly recommended to use 'offset' if possible, rather than
+    * doing math on the pointer.
+    *
+    * If the same byte is mapped my multiple descriptors, their descriptors
+    * must have the same pointer.
+    * If 'start' does not point to the first byte in the pointer, put the
+    * difference in 'offset' instead.
+    *
+    * May be NULL if there's nothing usable here (e.g. hardware registers and
+    * open bus). No flags should be set if the pointer is NULL.
+    * It's recommended to minimize the number of descriptors if possible,
+    * but not mandatory. */
+   void *ptr;
+   size_t offset;
+
+   /* This is the location in the emulated address space
+    * where the mapping starts. */
+   size_t start;
+
+   /* Which bits must be same as in 'start' for this mapping to apply.
+    * The first memory descriptor to claim a certain byte is the one
+    * that applies.
+    * A bit which is set in 'start' must also be set in this.
+    * Can be zero, in which case each byte is assumed mapped exactly once.
+    * In this case, 'len' must be a power of two. */
+   size_t select;
+
+   /* If this is nonzero, the set bits are assumed not connected to the
+    * memory chip's address pins. */
+   size_t disconnect;
+
+   /* This one tells the size of the current memory area.
+    * If, after start+disconnect are applied, the address is higher than
+    * this, the highest bit of the address is cleared.
+    *
+    * If the address is still too high, the next highest bit is cleared.
+    * Can be zero, in which case it's assumed to be infinite (as limited
+    * by 'select' and 'disconnect'). */
+   size_t len;
+
+   /* To go from emulated address to physical address, the following
+    * order applies:
+    * Subtract 'start', pick off 'disconnect', apply 'len', add 'offset'. */
+
+   /* The address space name must consist of only a-zA-Z0-9_-,
+    * should be as short as feasible (maximum length is 8 plus the NUL),
+    * and may not be any other address space plus one or more 0-9A-F
+    * at the end.
+    * However, multiple memory descriptors for the same address space is
+    * allowed, and the address space name can be empty. NULL is treated
+    * as empty.
+    *
+    * Address space names are case sensitive, but avoid lowercase if possible.
+    * The same pointer may exist in multiple address spaces.
+    *
+    * Examples:
+    * blank+blank - valid (multiple things may be mapped in the same namespace)
+    * 'Sp'+'Sp' - valid (multiple things may be mapped in the same namespace)
+    * 'A'+'B' - valid (neither is a prefix of each other)
+    * 'S'+blank - valid ('S' is not in 0-9A-F)
+    * 'a'+blank - valid ('a' is not in 0-9A-F)
+    * 'a'+'A' - valid (neither is a prefix of each other)
+    * 'AR'+blank - valid ('R' is not in 0-9A-F)
+    * 'ARB'+blank - valid (the B can't be part of the address either, because
+    *                      there is no namespace 'AR')
+    * blank+'B' - not valid, because it's ambigous which address space B1234
+    *             would refer to.
+    * The length can't be used for that purpose; the frontend may want
+    * to append arbitrary data to an address, without a separator. */
+   const char *addrspace;
+
+   /* TODO: When finalizing this one, add a description field, which should be
+    * "WRAM" or something roughly equally long. */
+
+   /* TODO: When finalizing this one, replace 'select' with 'limit', which tells
+    * which bits can vary and still refer to the same address (limit = ~select).
+    * TODO: limit? range? vary? something else? */
+
+   /* TODO: When finalizing this one, if 'len' is above what 'select' (or
+    * 'limit') allows, it's bankswitched. Bankswitched data must have both 'len'
+    * and 'select' != 0, and the mappings don't tell how the system switches the
+    * banks. */
+
+   /* TODO: When finalizing this one, fix the 'len' bit removal order.
+    * For len=0x1800, pointer 0x1C00 should go to 0x1400, not 0x0C00.
+    * Algorithm: Take bits highest to lowest, but if it goes above len, clear
+    * the most recent addition and continue on the next bit.
+    * TODO: Can the above be optimized? Is "remove the lowest bit set in both
+    * pointer and 'len'" equivalent? */
+
+   /* TODO: Some emulators (MAME?) emulate big endian systems by only accessing
+    * the emulated memory in 32-bit chunks, native endian. But that's nothing
+    * compared to Darek Mihocka <http://www.emulators.com/docs/nx07_vm101.htm>
+    * (section Emulation 103 - Nearly Free Byte Reversal) - he flips the ENTIRE
+    * RAM backwards! I'll want to represent both of those, via some flags.
+    *
+    * I suspect MAME either didn't think of that idea, or don't want the #ifdef.
+    * Not sure which, nor do I really care. */
+
+   /* TODO: Some of those flags are unused and/or don't really make sense. Clean
+    * them up. */
+};
+
+/* The frontend may use the largest value of 'start'+'select' in a
+ * certain namespace to infer the size of the address space.
+ *
+ * If the address space is larger than that, a mapping with .ptr=NULL
+ * should be at the end of the array, with .select set to all ones for
+ * as long as the address space is big.
+ *
+ * Sample descriptors (minus .ptr, and RETRO_MEMFLAG_ on the flags):
+ * SNES WRAM:
+ * .start=0x7E0000, .len=0x20000
+ * (Note that this must be mapped before the ROM in most cases; some of the
+ * ROM mappers
+ * try to claim $7E0000, or at least $7E8000.)
+ * SNES SPC700 RAM:
+ * .addrspace="S", .len=0x10000
+ * SNES WRAM mirrors:
+ * .flags=MIRROR, .start=0x000000, .select=0xC0E000, .len=0x2000
+ * .flags=MIRROR, .start=0x800000, .select=0xC0E000, .len=0x2000
+ * SNES WRAM mirrors, alternate equivalent descriptor:
+ * .flags=MIRROR, .select=0x40E000, .disconnect=~0x1FFF
+ * (Various similar constructions can be created by combining parts of
+ * the above two.)
+ * SNES LoROM (512KB, mirrored a couple of times):
+ * .flags=CONST, .start=0x008000, .select=0x408000, .disconnect=0x8000, .len=512*1024
+ * .flags=CONST, .start=0x400000, .select=0x400000, .disconnect=0x8000, .len=512*1024
+ * SNES HiROM (4MB):
+ * .flags=CONST,                 .start=0x400000, .select=0x400000, .len=4*1024*1024
+ * .flags=CONST, .offset=0x8000, .start=0x008000, .select=0x408000, .len=4*1024*1024
+ * SNES ExHiROM (8MB):
+ * .flags=CONST, .offset=0,                  .start=0xC00000, .select=0xC00000, .len=4*1024*1024
+ * .flags=CONST, .offset=4*1024*1024,        .start=0x400000, .select=0xC00000, .len=4*1024*1024
+ * .flags=CONST, .offset=0x8000,             .start=0x808000, .select=0xC08000, .len=4*1024*1024
+ * .flags=CONST, .offset=4*1024*1024+0x8000, .start=0x008000, .select=0xC08000, .len=4*1024*1024
+ * Clarify the size of the address space:
+ * .ptr=NULL, .select=0xFFFFFF
+ * .len can be implied by .select in many of them, but was included for clarity.
+ */
+
+struct retro_memory_map
+{
+   const struct retro_memory_descriptor *descriptors;
+   unsigned num_descriptors;
+};
+
+struct retro_controller_description
+{
+   /* Human-readable description of the controller. Even if using a generic
+    * input device type, this can be set to the particular device type the
+    * core uses. */
+   const char *desc;
+
+   /* Device type passed to retro_set_controller_port_device(). If the device
+    * type is a sub-class of a generic input device type, use the
+    * RETRO_DEVICE_SUBCLASS macro to create an ID.
+    *
+    * E.g. RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 1). */
+   unsigned id;
+};
+
+struct retro_controller_info
+{
+   const struct retro_controller_description *types;
+   unsigned num_types;
+};
+
+struct retro_subsystem_memory_info
+{
+   /* The extension associated with a memory type, e.g. "psram". */
+   const char *extension;
+
+   /* The memory type for retro_get_memory(). This should be at
+    * least 0x100 to avoid conflict with standardized
+    * libretro memory types. */
+   unsigned type;
+};
+
+struct retro_subsystem_rom_info
+{
+   /* Describes what the content is (SGB BIOS, GB ROM, etc). */
+   const char *desc;
+
+   /* Same definition as retro_get_system_info(). */
+   const char *valid_extensions;
+
+   /* Same definition as retro_get_system_info(). */
+   bool need_fullpath;
+
+   /* Same definition as retro_get_system_info(). */
+   bool block_extract;
+
+   /* This is set if the content is required to load a game.
+    * If this is set to false, a zeroed-out retro_game_info can be passed. */
+   bool required;
+
+   /* Content can have multiple associated persistent
+    * memory types (retro_get_memory()). */
+   const struct retro_subsystem_memory_info *memory;
+   unsigned num_memory;
+};
+
+struct retro_subsystem_info
+{
+   /* Human-readable string of the subsystem type, e.g. "Super GameBoy" */
+   const char *desc;
+
+   /* A computer friendly short string identifier for the subsystem type.
+    * This name must be [a-z].
+    * E.g. if desc is "Super GameBoy", this can be "sgb".
+    * This identifier can be used for command-line interfaces, etc.
+    */
+   const char *ident;
+
+   /* Infos for each content file. The first entry is assumed to be the
+    * "most significant" content for frontend purposes.
+    * E.g. with Super GameBoy, the first content should be the GameBoy ROM,
+    * as it is the most "significant" content to a user.
+    * If a frontend creates new file paths based on the content used
+    * (e.g. savestates), it should use the path for the first ROM to do so. */
+   const struct retro_subsystem_rom_info *roms;
+
+   /* Number of content files associated with a subsystem. */
+   unsigned num_roms;
+
+   /* The type passed to retro_load_game_special(). */
+   unsigned id;
+};
+
+typedef void (RETRO_CALLCONV *retro_proc_address_t)(void);
+
+/* libretro API extension functions:
+ * (None here so far).
+ *
+ * Get a symbol from a libretro core.
+ * Cores should only return symbols which are actual
+ * extensions to the libretro API.
+ *
+ * Frontends should not use this to obtain symbols to standard
+ * libretro entry points (static linking or dlsym).
+ *
+ * The symbol name must be equal to the function name,
+ * e.g. if void retro_foo(void); exists, the symbol must be called "retro_foo".
+ * The returned function pointer must be cast to the corresponding type.
+ */
+typedef retro_proc_address_t (RETRO_CALLCONV *retro_get_proc_address_t)(const char *sym);
+
+struct retro_get_proc_address_interface
+{
+   retro_get_proc_address_t get_proc_address;
+};
+
+enum retro_log_level
+{
+   RETRO_LOG_DEBUG = 0,
+   RETRO_LOG_INFO,
+   RETRO_LOG_WARN,
+   RETRO_LOG_ERROR,
+
+   RETRO_LOG_DUMMY = INT_MAX
+};
+
+/* Logging function. Takes log level argument as well. */
+typedef void (RETRO_CALLCONV *retro_log_printf_t)(enum retro_log_level level,
+      const char *fmt, ...);
+
+struct retro_log_callback
+{
+   retro_log_printf_t log;
+};
+
+/* Performance related functions */
+
+/* ID values for SIMD CPU features */
+#define RETRO_SIMD_SSE      (1 << 0)
+#define RETRO_SIMD_SSE2     (1 << 1)
+#define RETRO_SIMD_VMX      (1 << 2)
+#define RETRO_SIMD_VMX128   (1 << 3)
+#define RETRO_SIMD_AVX      (1 << 4)
+#define RETRO_SIMD_NEON     (1 << 5)
+#define RETRO_SIMD_SSE3     (1 << 6)
+#define RETRO_SIMD_SSSE3    (1 << 7)
+#define RETRO_SIMD_MMX      (1 << 8)
+#define RETRO_SIMD_MMXEXT   (1 << 9)
+#define RETRO_SIMD_SSE4     (1 << 10)
+#define RETRO_SIMD_SSE42    (1 << 11)
+#define RETRO_SIMD_AVX2     (1 << 12)
+#define RETRO_SIMD_VFPU     (1 << 13)
+#define RETRO_SIMD_PS       (1 << 14)
+#define RETRO_SIMD_AES      (1 << 15)
+#define RETRO_SIMD_VFPV3    (1 << 16)
+#define RETRO_SIMD_VFPV4    (1 << 17)
+#define RETRO_SIMD_POPCNT   (1 << 18)
+#define RETRO_SIMD_MOVBE    (1 << 19)
+#define RETRO_SIMD_CMOV     (1 << 20)
+#define RETRO_SIMD_ASIMD    (1 << 21)
+
+typedef uint64_t retro_perf_tick_t;
+typedef int64_t retro_time_t;
+
+struct retro_perf_counter
+{
+   const char *ident;
+   retro_perf_tick_t start;
+   retro_perf_tick_t total;
+   retro_perf_tick_t call_cnt;
+
+   bool registered;
+};
+
+/* Returns current time in microseconds.
+ * Tries to use the most accurate timer available.
+ */
+typedef retro_time_t (RETRO_CALLCONV *retro_perf_get_time_usec_t)(void);
+
+/* A simple counter. Usually nanoseconds, but can also be CPU cycles.
+ * Can be used directly if desired (when creating a more sophisticated
+ * performance counter system).
+ * */
+typedef retro_perf_tick_t (RETRO_CALLCONV *retro_perf_get_counter_t)(void);
+
+/* Returns a bit-mask of detected CPU features (RETRO_SIMD_*). */
+typedef uint64_t (RETRO_CALLCONV *retro_get_cpu_features_t)(void);
+
+/* Asks frontend to log and/or display the state of performance counters.
+ * Performance counters can always be poked into manually as well.
+ */
+typedef void (RETRO_CALLCONV *retro_perf_log_t)(void);
+
+/* Register a performance counter.
+ * ident field must be set with a discrete value and other values in
+ * retro_perf_counter must be 0.
+ * Registering can be called multiple times. To avoid calling to
+ * frontend redundantly, you can check registered field first. */
+typedef void (RETRO_CALLCONV *retro_perf_register_t)(struct retro_perf_counter *counter);
+
+/* Starts a registered counter. */
+typedef void (RETRO_CALLCONV *retro_perf_start_t)(struct retro_perf_counter *counter);
+
+/* Stops a registered counter. */
+typedef void (RETRO_CALLCONV *retro_perf_stop_t)(struct retro_perf_counter *counter);
+
+/* For convenience it can be useful to wrap register, start and stop in macros.
+ * E.g.:
+ * #ifdef LOG_PERFORMANCE
+ * #define RETRO_PERFORMANCE_INIT(perf_cb, name) static struct retro_perf_counter name = {#name}; if (!name.registered) perf_cb.perf_register(&(name))
+ * #define RETRO_PERFORMANCE_START(perf_cb, name) perf_cb.perf_start(&(name))
+ * #define RETRO_PERFORMANCE_STOP(perf_cb, name) perf_cb.perf_stop(&(name))
+ * #else
+ * ... Blank macros ...
+ * #endif
+ *
+ * These can then be used mid-functions around code snippets.
+ *
+ * extern struct retro_perf_callback perf_cb;  * Somewhere in the core.
+ *
+ * void do_some_heavy_work(void)
+ * {
+ *    RETRO_PERFORMANCE_INIT(cb, work_1;
+ *    RETRO_PERFORMANCE_START(cb, work_1);
+ *    heavy_work_1();
+ *    RETRO_PERFORMANCE_STOP(cb, work_1);
+ *
+ *    RETRO_PERFORMANCE_INIT(cb, work_2);
+ *    RETRO_PERFORMANCE_START(cb, work_2);
+ *    heavy_work_2();
+ *    RETRO_PERFORMANCE_STOP(cb, work_2);
+ * }
+ *
+ * void retro_deinit(void)
+ * {
+ *    perf_cb.perf_log();  * Log all perf counters here for example.
+ * }
+ */
+
+struct retro_perf_callback
+{
+   retro_perf_get_time_usec_t    get_time_usec;
+   retro_get_cpu_features_t      get_cpu_features;
+
+   retro_perf_get_counter_t      get_perf_counter;
+   retro_perf_register_t         perf_register;
+   retro_perf_start_t            perf_start;
+   retro_perf_stop_t             perf_stop;
+   retro_perf_log_t              perf_log;
+};
+
+/* FIXME: Document the sensor API and work out behavior.
+ * It will be marked as experimental until then.
+ */
+enum retro_sensor_action
+{
+   RETRO_SENSOR_ACCELEROMETER_ENABLE = 0,
+   RETRO_SENSOR_ACCELEROMETER_DISABLE,
+   RETRO_SENSOR_GYROSCOPE_ENABLE,
+   RETRO_SENSOR_GYROSCOPE_DISABLE,
+   RETRO_SENSOR_ILLUMINANCE_ENABLE,
+   RETRO_SENSOR_ILLUMINANCE_DISABLE,
+
+   RETRO_SENSOR_DUMMY = INT_MAX
+};
+
+/* Id values for SENSOR types. */
+#define RETRO_SENSOR_ACCELEROMETER_X 0
+#define RETRO_SENSOR_ACCELEROMETER_Y 1
+#define RETRO_SENSOR_ACCELEROMETER_Z 2
+#define RETRO_SENSOR_GYROSCOPE_X 3
+#define RETRO_SENSOR_GYROSCOPE_Y 4
+#define RETRO_SENSOR_GYROSCOPE_Z 5
+#define RETRO_SENSOR_ILLUMINANCE 6
+
+typedef bool (RETRO_CALLCONV *retro_set_sensor_state_t)(unsigned port,
+      enum retro_sensor_action action, unsigned rate);
+
+typedef float (RETRO_CALLCONV *retro_sensor_get_input_t)(unsigned port, unsigned id);
+
+struct retro_sensor_interface
+{
+   retro_set_sensor_state_t set_sensor_state;
+   retro_sensor_get_input_t get_sensor_input;
+};
+
+enum retro_camera_buffer
+{
+   RETRO_CAMERA_BUFFER_OPENGL_TEXTURE = 0,
+   RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER,
+
+   RETRO_CAMERA_BUFFER_DUMMY = INT_MAX
+};
+
+/* Starts the camera driver. Can only be called in retro_run(). */
+typedef bool (RETRO_CALLCONV *retro_camera_start_t)(void);
+
+/* Stops the camera driver. Can only be called in retro_run(). */
+typedef void (RETRO_CALLCONV *retro_camera_stop_t)(void);
+
+/* Callback which signals when the camera driver is initialized
+ * and/or deinitialized.
+ * retro_camera_start_t can be called in initialized callback.
+ */
+typedef void (RETRO_CALLCONV *retro_camera_lifetime_status_t)(void);
+
+/* A callback for raw framebuffer data. buffer points to an XRGB8888 buffer.
+ * Width, height and pitch are similar to retro_video_refresh_t.
+ * First pixel is top-left origin.
+ */
+typedef void (RETRO_CALLCONV *retro_camera_frame_raw_framebuffer_t)(const uint32_t *buffer,
+      unsigned width, unsigned height, size_t pitch);
+
+/* A callback for when OpenGL textures are used.
+ *
+ * texture_id is a texture owned by camera driver.
+ * Its state or content should be considered immutable, except for things like
+ * texture filtering and clamping.
+ *
+ * texture_target is the texture target for the GL texture.
+ * These can include e.g. GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE, and possibly
+ * more depending on extensions.
+ *
+ * affine points to a packed 3x3 column-major matrix used to apply an affine
+ * transform to texture coordinates. (affine_matrix * vec3(coord_x, coord_y, 1.0))
+ * After transform, normalized texture coord (0, 0) should be bottom-left
+ * and (1, 1) should be top-right (or (width, height) for RECTANGLE).
+ *
+ * GL-specific typedefs are avoided here to avoid relying on gl.h in
+ * the API definition.
+ */
+typedef void (RETRO_CALLCONV *retro_camera_frame_opengl_texture_t)(unsigned texture_id,
+      unsigned texture_target, const float *affine);
+
+struct retro_camera_callback
+{
+   /* Set by libretro core.
+    * Example bitmask: caps = (1 << RETRO_CAMERA_BUFFER_OPENGL_TEXTURE) | (1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER).
+    */
+   uint64_t caps;
+
+   /* Desired resolution for camera. Is only used as a hint. */
+   unsigned width;
+   unsigned height;
+
+   /* Set by frontend. */
+   retro_camera_start_t start;
+   retro_camera_stop_t stop;
+
+   /* Set by libretro core if raw framebuffer callbacks will be used. */
+   retro_camera_frame_raw_framebuffer_t frame_raw_framebuffer;
+
+   /* Set by libretro core if OpenGL texture callbacks will be used. */
+   retro_camera_frame_opengl_texture_t frame_opengl_texture;
+
+   /* Set by libretro core. Called after camera driver is initialized and
+    * ready to be started.
+    * Can be NULL, in which this callback is not called.
+    */
+   retro_camera_lifetime_status_t initialized;
+
+   /* Set by libretro core. Called right before camera driver is
+    * deinitialized.
+    * Can be NULL, in which this callback is not called.
+    */
+   retro_camera_lifetime_status_t deinitialized;
+};
+
+/* Sets the interval of time and/or distance at which to update/poll
+ * location-based data.
+ *
+ * To ensure compatibility with all location-based implementations,
+ * values for both interval_ms and interval_distance should be provided.
+ *
+ * interval_ms is the interval expressed in milliseconds.
+ * interval_distance is the distance interval expressed in meters.
+ */
+typedef void (RETRO_CALLCONV *retro_location_set_interval_t)(unsigned interval_ms,
+      unsigned interval_distance);
+
+/* Start location services. The device will start listening for changes to the
+ * current location at regular intervals (which are defined with
+ * retro_location_set_interval_t). */
+typedef bool (RETRO_CALLCONV *retro_location_start_t)(void);
+
+/* Stop location services. The device will stop listening for changes
+ * to the current location. */
+typedef void (RETRO_CALLCONV *retro_location_stop_t)(void);
+
+/* Get the position of the current location. Will set parameters to
+ * 0 if no new  location update has happened since the last time. */
+typedef bool (RETRO_CALLCONV *retro_location_get_position_t)(double *lat, double *lon,
+      double *horiz_accuracy, double *vert_accuracy);
+
+/* Callback which signals when the location driver is initialized
+ * and/or deinitialized.
+ * retro_location_start_t can be called in initialized callback.
+ */
+typedef void (RETRO_CALLCONV *retro_location_lifetime_status_t)(void);
+
+struct retro_location_callback
+{
+   retro_location_start_t         start;
+   retro_location_stop_t          stop;
+   retro_location_get_position_t  get_position;
+   retro_location_set_interval_t  set_interval;
+
+   retro_location_lifetime_status_t initialized;
+   retro_location_lifetime_status_t deinitialized;
+};
+
+enum retro_rumble_effect
+{
+   RETRO_RUMBLE_STRONG = 0,
+   RETRO_RUMBLE_WEAK = 1,
+
+   RETRO_RUMBLE_DUMMY = INT_MAX
+};
+
+/* Sets rumble state for joypad plugged in port 'port'.
+ * Rumble effects are controlled independently,
+ * and setting e.g. strong rumble does not override weak rumble.
+ * Strength has a range of [0, 0xffff].
+ *
+ * Returns true if rumble state request was honored.
+ * Calling this before first retro_run() is likely to return false. */
+typedef bool (RETRO_CALLCONV *retro_set_rumble_state_t)(unsigned port,
+      enum retro_rumble_effect effect, uint16_t strength);
+
+struct retro_rumble_interface
+{
+   retro_set_rumble_state_t set_rumble_state;
+};
+
+/* Notifies libretro that audio data should be written. */
+typedef void (RETRO_CALLCONV *retro_audio_callback_t)(void);
+
+/* True: Audio driver in frontend is active, and callback is
+ * expected to be called regularily.
+ * False: Audio driver in frontend is paused or inactive.
+ * Audio callback will not be called until set_state has been
+ * called with true.
+ * Initial state is false (inactive).
+ */
+typedef void (RETRO_CALLCONV *retro_audio_set_state_callback_t)(bool enabled);
+
+struct retro_audio_callback
+{
+   retro_audio_callback_t callback;
+   retro_audio_set_state_callback_t set_state;
+};
+
+/* Notifies a libretro core of time spent since last invocation
+ * of retro_run() in microseconds.
+ *
+ * It will be called right before retro_run() every frame.
+ * The frontend can tamper with timing to support cases like
+ * fast-forward, slow-motion and framestepping.
+ *
+ * In those scenarios the reference frame time value will be used. */
+typedef int64_t retro_usec_t;
+typedef void (RETRO_CALLCONV *retro_frame_time_callback_t)(retro_usec_t usec);
+struct retro_frame_time_callback
+{
+   retro_frame_time_callback_t callback;
+   /* Represents the time of one frame. It is computed as
+    * 1000000 / fps, but the implementation will resolve the
+    * rounding to ensure that framestepping, etc is exact. */
+   retro_usec_t reference;
+};
+
+/* Notifies a libretro core of the current occupancy
+ * level of the frontend audio buffer.
+ *
+ * - active: 'true' if audio buffer is currently
+ *           in use. Will be 'false' if audio is
+ *           disabled in the frontend
+ *
+ * - occupancy: Given as a value in the range [0,100],
+ *              corresponding to the occupancy percentage
+ *              of the audio buffer
+ *
+ * - underrun_likely: 'true' if the frontend expects an
+ *                    audio buffer underrun during the
+ *                    next frame (indicates that a core
+ *                    should attempt frame skipping)
+ *
+ * It will be called right before retro_run() every frame. */
+typedef void (RETRO_CALLCONV *retro_audio_buffer_status_callback_t)(
+      bool active, unsigned occupancy, bool underrun_likely);
+struct retro_audio_buffer_status_callback
+{
+   retro_audio_buffer_status_callback_t callback;
+};
+
+/* Pass this to retro_video_refresh_t if rendering to hardware.
+ * Passing NULL to retro_video_refresh_t is still a frame dupe as normal.
+ * */
+#define RETRO_HW_FRAME_BUFFER_VALID ((void*)-1)
+
+/* Invalidates the current HW context.
+ * Any GL state is lost, and must not be deinitialized explicitly.
+ * If explicit deinitialization is desired by the libretro core,
+ * it should implement context_destroy callback.
+ * If called, all GPU resources must be reinitialized.
+ * Usually called when frontend reinits video driver.
+ * Also called first time video driver is initialized,
+ * allowing libretro core to initialize resources.
+ */
+typedef void (RETRO_CALLCONV *retro_hw_context_reset_t)(void);
+
+/* Gets current framebuffer which is to be rendered to.
+ * Could change every frame potentially.
+ */
+typedef uintptr_t (RETRO_CALLCONV *retro_hw_get_current_framebuffer_t)(void);
+
+/* Get a symbol from HW context. */
+typedef retro_proc_address_t (RETRO_CALLCONV *retro_hw_get_proc_address_t)(const char *sym);
+
+enum retro_hw_context_type
+{
+   RETRO_HW_CONTEXT_NONE             = 0,
+   /* OpenGL 2.x. Driver can choose to use latest compatibility context. */
+   RETRO_HW_CONTEXT_OPENGL           = 1,
+   /* OpenGL ES 2.0. */
+   RETRO_HW_CONTEXT_OPENGLES2        = 2,
+   /* Modern desktop core GL context. Use version_major/
+    * version_minor fields to set GL version. */
+   RETRO_HW_CONTEXT_OPENGL_CORE      = 3,
+   /* OpenGL ES 3.0 */
+   RETRO_HW_CONTEXT_OPENGLES3        = 4,
+   /* OpenGL ES 3.1+. Set version_major/version_minor. For GLES2 and GLES3,
+    * use the corresponding enums directly. */
+   RETRO_HW_CONTEXT_OPENGLES_VERSION = 5,
+
+   /* Vulkan, see RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE. */
+   RETRO_HW_CONTEXT_VULKAN           = 6,
+
+   /* Direct3D, set version_major to select the type of interface
+    * returned by RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE */
+   RETRO_HW_CONTEXT_DIRECT3D         = 7,
+
+   RETRO_HW_CONTEXT_DUMMY = INT_MAX
+};
+
+struct retro_hw_render_callback
+{
+   /* Which API to use. Set by libretro core. */
+   enum retro_hw_context_type context_type;
+
+   /* Called when a context has been created or when it has been reset.
+    * An OpenGL context is only valid after context_reset() has been called.
+    *
+    * When context_reset is called, OpenGL resources in the libretro
+    * implementation are guaranteed to be invalid.
+    *
+    * It is possible that context_reset is called multiple times during an
+    * application lifecycle.
+    * If context_reset is called without any notification (context_destroy),
+    * the OpenGL context was lost and resources should just be recreated
+    * without any attempt to "free" old resources.
+    */
+   retro_hw_context_reset_t context_reset;
+
+   /* Set by frontend.
+    * TODO: This is rather obsolete. The frontend should not
+    * be providing preallocated framebuffers. */
+   retro_hw_get_current_framebuffer_t get_current_framebuffer;
+
+   /* Set by frontend.
+    * Can return all relevant functions, including glClear on Windows. */
+   retro_hw_get_proc_address_t get_proc_address;
+
+   /* Set if render buffers should have depth component attached.
+    * TODO: Obsolete. */
+   bool depth;
+
+   /* Set if stencil buffers should be attached.
+    * TODO: Obsolete. */
+   bool stencil;
+
+   /* If depth and stencil are true, a packed 24/8 buffer will be added.
+    * Only attaching stencil is invalid and will be ignored. */
+
+   /* Use conventional bottom-left origin convention. If false,
+    * standard libretro top-left origin semantics are used.
+    * TODO: Move to GL specific interface. */
+   bool bottom_left_origin;
+
+   /* Major version number for core GL context or GLES 3.1+. */
+   unsigned version_major;
+
+   /* Minor version number for core GL context or GLES 3.1+. */
+   unsigned version_minor;
+
+   /* If this is true, the frontend will go very far to avoid
+    * resetting context in scenarios like toggling fullscreen, etc.
+    * TODO: Obsolete? Maybe frontend should just always assume this ...
+    */
+   bool cache_context;
+
+   /* The reset callback might still be called in extreme situations
+    * such as if the context is lost beyond recovery.
+    *
+    * For optimal stability, set this to false, and allow context to be
+    * reset at any time.
+    */
+
+   /* A callback to be called before the context is destroyed in a
+    * controlled way by the frontend. */
+   retro_hw_context_reset_t context_destroy;
+
+   /* OpenGL resources can be deinitialized cleanly at this step.
+    * context_destroy can be set to NULL, in which resources will
+    * just be destroyed without any notification.
+    *
+    * Even when context_destroy is non-NULL, it is possible that
+    * context_reset is called without any destroy notification.
+    * This happens if context is lost by external factors (such as
+    * notified by GL_ARB_robustness).
+    *
+    * In this case, the context is assumed to be already dead,
+    * and the libretro implementation must not try to free any OpenGL
+    * resources in the subsequent context_reset.
+    */
+
+   /* Creates a debug context. */
+   bool debug_context;
+};
+
+/* Callback type passed in RETRO_ENVIRONMENT_SET_KEYBOARD_CALLBACK.
+ * Called by the frontend in response to keyboard events.
+ * down is set if the key is being pressed, or false if it is being released.
+ * keycode is the RETROK value of the char.
+ * character is the text character of the pressed key. (UTF-32).
+ * key_modifiers is a set of RETROKMOD values or'ed together.
+ *
+ * The pressed/keycode state can be indepedent of the character.
+ * It is also possible that multiple characters are generated from a
+ * single keypress.
+ * Keycode events should be treated separately from character events.
+ * However, when possible, the frontend should try to synchronize these.
+ * If only a character is posted, keycode should be RETROK_UNKNOWN.
+ *
+ * Similarily if only a keycode event is generated with no corresponding
+ * character, character should be 0.
+ */
+typedef void (RETRO_CALLCONV *retro_keyboard_event_t)(bool down, unsigned keycode,
+      uint32_t character, uint16_t key_modifiers);
+
+struct retro_keyboard_callback
+{
+   retro_keyboard_event_t callback;
+};
+
+/* Callbacks for RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE &
+ * RETRO_ENVIRONMENT_SET_DISK_CONTROL_EXT_INTERFACE.
+ * Should be set for implementations which can swap out multiple disk
+ * images in runtime.
+ *
+ * If the implementation can do this automatically, it should strive to do so.
+ * However, there are cases where the user must manually do so.
+ *
+ * Overview: To swap a disk image, eject the disk image with
+ * set_eject_state(true).
+ * Set the disk index with set_image_index(index). Insert the disk again
+ * with set_eject_state(false).
+ */
+
+/* If ejected is true, "ejects" the virtual disk tray.
+ * When ejected, the disk image index can be set.
+ */
+typedef bool (RETRO_CALLCONV *retro_set_eject_state_t)(bool ejected);
+
+/* Gets current eject state. The initial state is 'not ejected'. */
+typedef bool (RETRO_CALLCONV *retro_get_eject_state_t)(void);
+
+/* Gets current disk index. First disk is index 0.
+ * If return value is >= get_num_images(), no disk is currently inserted.
+ */
+typedef unsigned (RETRO_CALLCONV *retro_get_image_index_t)(void);
+
+/* Sets image index. Can only be called when disk is ejected.
+ * The implementation supports setting "no disk" by using an
+ * index >= get_num_images().
+ */
+typedef bool (RETRO_CALLCONV *retro_set_image_index_t)(unsigned index);
+
+/* Gets total number of images which are available to use. */
+typedef unsigned (RETRO_CALLCONV *retro_get_num_images_t)(void);
+
+struct retro_game_info;
+
+/* Replaces the disk image associated with index.
+ * Arguments to pass in info have same requirements as retro_load_game().
+ * Virtual disk tray must be ejected when calling this.
+ *
+ * Replacing a disk image with info = NULL will remove the disk image
+ * from the internal list.
+ * As a result, calls to get_image_index() can change.
+ *
+ * E.g. replace_image_index(1, NULL), and previous get_image_index()
+ * returned 4 before.
+ * Index 1 will be removed, and the new index is 3.
+ */
+typedef bool (RETRO_CALLCONV *retro_replace_image_index_t)(unsigned index,
+      const struct retro_game_info *info);
+
+/* Adds a new valid index (get_num_images()) to the internal disk list.
+ * This will increment subsequent return values from get_num_images() by 1.
+ * This image index cannot be used until a disk image has been set
+ * with replace_image_index. */
+typedef bool (RETRO_CALLCONV *retro_add_image_index_t)(void);
+
+/* Sets initial image to insert in drive when calling
+ * core_load_game().
+ * Since we cannot pass the initial index when loading
+ * content (this would require a major API change), this
+ * is set by the frontend *before* calling the core's
+ * retro_load_game()/retro_load_game_special() implementation.
+ * A core should therefore cache the index/path values and handle
+ * them inside retro_load_game()/retro_load_game_special().
+ * - If 'index' is invalid (index >= get_num_images()), the
+ *   core should ignore the set value and instead use 0
+ * - 'path' is used purely for error checking - i.e. when
+ *   content is loaded, the core should verify that the
+ *   disk specified by 'index' has the specified file path.
+ *   This is to guard against auto selecting the wrong image
+ *   if (for example) the user should modify an existing M3U
+ *   playlist. We have to let the core handle this because
+ *   set_initial_image() must be called before loading content,
+ *   i.e. the frontend cannot access image paths in advance
+ *   and thus cannot perform the error check itself.
+ *   If set path and content path do not match, the core should
+ *   ignore the set 'index' value and instead use 0
+ * Returns 'false' if index or 'path' are invalid, or core
+ * does not support this functionality
+ */
+typedef bool (RETRO_CALLCONV *retro_set_initial_image_t)(unsigned index, const char *path);
+
+/* Fetches the path of the specified disk image file.
+ * Returns 'false' if index is invalid (index >= get_num_images())
+ * or path is otherwise unavailable.
+ */
+typedef bool (RETRO_CALLCONV *retro_get_image_path_t)(unsigned index, char *path, size_t len);
+
+/* Fetches a core-provided 'label' for the specified disk
+ * image file. In the simplest case this may be a file name
+ * (without extension), but for cores with more complex
+ * content requirements information may be provided to
+ * facilitate user disk swapping - for example, a core
+ * running floppy-disk-based content may uniquely label
+ * save disks, data disks, level disks, etc. with names
+ * corresponding to in-game disk change prompts (so the
+ * frontend can provide better user guidance than a 'dumb'
+ * disk index value).
+ * Returns 'false' if index is invalid (index >= get_num_images())
+ * or label is otherwise unavailable.
+ */
+typedef bool (RETRO_CALLCONV *retro_get_image_label_t)(unsigned index, char *label, size_t len);
+
+struct retro_disk_control_callback
+{
+   retro_set_eject_state_t set_eject_state;
+   retro_get_eject_state_t get_eject_state;
+
+   retro_get_image_index_t get_image_index;
+   retro_set_image_index_t set_image_index;
+   retro_get_num_images_t  get_num_images;
+
+   retro_replace_image_index_t replace_image_index;
+   retro_add_image_index_t add_image_index;
+};
+
+struct retro_disk_control_ext_callback
+{
+   retro_set_eject_state_t set_eject_state;
+   retro_get_eject_state_t get_eject_state;
+
+   retro_get_image_index_t get_image_index;
+   retro_set_image_index_t set_image_index;
+   retro_get_num_images_t  get_num_images;
+
+   retro_replace_image_index_t replace_image_index;
+   retro_add_image_index_t add_image_index;
+
+   /* NOTE: Frontend will only attempt to record/restore
+    * last used disk index if both set_initial_image()
+    * and get_image_path() are implemented */
+   retro_set_initial_image_t set_initial_image; /* Optional - may be NULL */
+
+   retro_get_image_path_t get_image_path;       /* Optional - may be NULL */
+   retro_get_image_label_t get_image_label;     /* Optional - may be NULL */
+};
+
+enum retro_pixel_format
+{
+   /* 0RGB1555, native endian.
+    * 0 bit must be set to 0.
+    * This pixel format is default for compatibility concerns only.
+    * If a 15/16-bit pixel format is desired, consider using RGB565. */
+   RETRO_PIXEL_FORMAT_0RGB1555 = 0,
+
+   /* XRGB8888, native endian.
+    * X bits are ignored. */
+   RETRO_PIXEL_FORMAT_XRGB8888 = 1,
+
+   /* RGB565, native endian.
+    * This pixel format is the recommended format to use if a 15/16-bit
+    * format is desired as it is the pixel format that is typically
+    * available on a wide range of low-power devices.
+    *
+    * It is also natively supported in APIs like OpenGL ES. */
+   RETRO_PIXEL_FORMAT_RGB565   = 2,
+
+   /* Ensure sizeof() == sizeof(int). */
+   RETRO_PIXEL_FORMAT_UNKNOWN  = INT_MAX
+};
+
+struct retro_message
+{
+   const char *msg;        /* Message to be displayed. */
+   unsigned    frames;     /* Duration in frames of message. */
+};
+
+enum retro_message_target
+{
+   RETRO_MESSAGE_TARGET_ALL = 0,
+   RETRO_MESSAGE_TARGET_OSD,
+   RETRO_MESSAGE_TARGET_LOG
+};
+
+enum retro_message_type
+{
+   RETRO_MESSAGE_TYPE_NOTIFICATION = 0,
+   RETRO_MESSAGE_TYPE_NOTIFICATION_ALT,
+   RETRO_MESSAGE_TYPE_STATUS,
+   RETRO_MESSAGE_TYPE_PROGRESS
+};
+
+struct retro_message_ext
+{
+   /* Message string to be displayed/logged */
+   const char *msg;
+   /* Duration (in ms) of message when targeting the OSD */
+   unsigned duration;
+   /* Message priority when targeting the OSD
+    * > When multiple concurrent messages are sent to
+    *   the frontend and the frontend does not have the
+    *   capacity to display them all, messages with the
+    *   *highest* priority value should be shown
+    * > There is no upper limit to a message priority
+    *   value (within the bounds of the unsigned data type)
+    * > In the reference frontend (RetroArch), the same
+    *   priority values are used for frontend-generated
+    *   notifications, which are typically assigned values
+    *   between 0 and 3 depending upon importance */
+   unsigned priority;
+   /* Message logging level (info, warn, error, etc.) */
+   enum retro_log_level level;
+   /* Message destination: OSD, logging interface or both */
+   enum retro_message_target target;
+   /* Message 'type' when targeting the OSD
+    * > RETRO_MESSAGE_TYPE_NOTIFICATION: Specifies that a
+    *   message should be handled in identical fashion to
+    *   a standard frontend-generated notification
+    * > RETRO_MESSAGE_TYPE_NOTIFICATION_ALT: Specifies that
+    *   message is a notification that requires user attention
+    *   or action, but that it should be displayed in a manner
+    *   that differs from standard frontend-generated notifications.
+    *   This would typically correspond to messages that should be
+    *   displayed immediately (independently from any internal
+    *   frontend message queue), and/or which should be visually
+    *   distinguishable from frontend-generated notifications.
+    *   For example, a core may wish to inform the user of
+    *   information related to a disk-change event. It is
+    *   expected that the frontend itself may provide a
+    *   notification in this case; if the core sends a
+    *   message of type RETRO_MESSAGE_TYPE_NOTIFICATION, an
+    *   uncomfortable 'double-notification' may occur. A message
+    *   of RETRO_MESSAGE_TYPE_NOTIFICATION_ALT should therefore
+    *   be presented such that visual conflict with regular
+    *   notifications does not occur
+    * > RETRO_MESSAGE_TYPE_STATUS: Indicates that message
+    *   is not a standard notification. This typically
+    *   corresponds to 'status' indicators, such as a core's
+    *   internal FPS, which are intended to be displayed
+    *   either permanently while a core is running, or in
+    *   a manner that does not suggest user attention or action
+    *   is required. 'Status' type messages should therefore be
+    *   displayed in a different on-screen location and in a manner
+    *   easily distinguishable from both standard frontend-generated
+    *   notifications and messages of type RETRO_MESSAGE_TYPE_NOTIFICATION_ALT
+    * > RETRO_MESSAGE_TYPE_PROGRESS: Indicates that message reports
+    *   the progress of an internal core task. For example, in cases
+    *   where a core itself handles the loading of content from a file,
+    *   this may correspond to the percentage of the file that has been
+    *   read. Alternatively, an audio/video playback core may use a
+    *   message of type RETRO_MESSAGE_TYPE_PROGRESS to display the current
+    *   playback position as a percentage of the runtime. 'Progress' type
+    *   messages should therefore be displayed as a literal progress bar,
+    *   where:
+    *   - 'retro_message_ext.msg' is the progress bar title/label
+    *   - 'retro_message_ext.progress' determines the length of
+    *     the progress bar
+    * NOTE: Message type is a *hint*, and may be ignored
+    * by the frontend. If a frontend lacks support for
+    * displaying messages via alternate means than standard
+    * frontend-generated notifications, it will treat *all*
+    * messages as having the type RETRO_MESSAGE_TYPE_NOTIFICATION */
+   enum retro_message_type type;
+   /* Task progress when targeting the OSD and message is
+    * of type RETRO_MESSAGE_TYPE_PROGRESS
+    * > -1:    Unmetered/indeterminate
+    * > 0-100: Current progress percentage
+    * NOTE: Since message type is a hint, a frontend may ignore
+    * progress values. Where relevant, a core should therefore
+    * include progress percentage within the message string,
+    * such that the message intent remains clear when displayed
+    * as a standard frontend-generated notification */
+   int8_t progress;
+};
+
+/* Describes how the libretro implementation maps a libretro input bind
+ * to its internal input system through a human readable string.
+ * This string can be used to better let a user configure input. */
+struct retro_input_descriptor
+{
+   /* Associates given parameters with a description. */
+   unsigned port;
+   unsigned device;
+   unsigned index;
+   unsigned id;
+
+   /* Human readable description for parameters.
+    * The pointer must remain valid until
+    * retro_unload_game() is called. */
+   const char *description;
+};
+
+struct retro_system_info
+{
+   /* All pointers are owned by libretro implementation, and pointers must
+    * remain valid until it is unloaded. */
+
+   const char *library_name;      /* Descriptive name of library. Should not
+                                   * contain any version numbers, etc. */
+   const char *library_version;   /* Descriptive version of core. */
+
+   const char *valid_extensions;  /* A string listing probably content
+                                   * extensions the core will be able to
+                                   * load, separated with pipe.
+                                   * I.e. "bin|rom|iso".
+                                   * Typically used for a GUI to filter
+                                   * out extensions. */
+
+   /* Libretro cores that need to have direct access to their content
+    * files, including cores which use the path of the content files to
+    * determine the paths of other files, should set need_fullpath to true.
+    *
+    * Cores should strive for setting need_fullpath to false,
+    * as it allows the frontend to perform patching, etc.
+    *
+    * If need_fullpath is true and retro_load_game() is called:
+    *    - retro_game_info::path is guaranteed to have a valid path
+    *    - retro_game_info::data and retro_game_info::size are invalid
+    *
+    * If need_fullpath is false and retro_load_game() is called:
+    *    - retro_game_info::path may be NULL
+    *    - retro_game_info::data and retro_game_info::size are guaranteed
+    *      to be valid
+    *
+    * See also:
+    *    - RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY
+    *    - RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY
+    */
+   bool        need_fullpath;
+
+   /* If true, the frontend is not allowed to extract any archives before
+    * loading the real content.
+    * Necessary for certain libretro implementations that load games
+    * from zipped archives. */
+   bool        block_extract;
+};
+
+/* Defines overrides which modify frontend handling of
+ * specific content file types.
+ * An array of retro_system_content_info_override is
+ * passed to RETRO_ENVIRONMENT_SET_CONTENT_INFO_OVERRIDE
+ * NOTE: In the following descriptions, references to
+ *       retro_load_game() may be replaced with
+ *       retro_load_game_special() */
+struct retro_system_content_info_override
+{
+   /* A list of file extensions for which the override
+    * should apply, delimited by a 'pipe' character
+    * (e.g. "md|sms|gg")
+    * Permitted file extensions are limited to those
+    * included in retro_system_info::valid_extensions
+    * and/or retro_subsystem_rom_info::valid_extensions */
+   const char *extensions;
+
+   /* Overrides the need_fullpath value set in
+    * retro_system_info and/or retro_subsystem_rom_info.
+    * To reiterate:
+    *
+    * If need_fullpath is true and retro_load_game() is called:
+    *    - retro_game_info::path is guaranteed to contain a valid
+    *      path to an existent file
+    *    - retro_game_info::data and retro_game_info::size are invalid
+    *
+    * If need_fullpath is false and retro_load_game() is called:
+    *    - retro_game_info::path may be NULL
+    *    - retro_game_info::data and retro_game_info::size are guaranteed
+    *      to be valid
+    *
+    * In addition:
+    *
+    * If need_fullpath is true and retro_load_game() is called:
+    *    - retro_game_info_ext::full_path is guaranteed to contain a valid
+    *      path to an existent file
+    *    - retro_game_info_ext::archive_path may be NULL
+    *    - retro_game_info_ext::archive_file may be NULL
+    *    - retro_game_info_ext::dir is guaranteed to contain a valid path
+    *      to the directory in which the content file exists
+    *    - retro_game_info_ext::name is guaranteed to contain the
+    *      basename of the content file, without extension
+    *    - retro_game_info_ext::ext is guaranteed to contain the
+    *      extension of the content file in lower case format
+    *    - retro_game_info_ext::data and retro_game_info_ext::size
+    *      are invalid
+    *
+    * If need_fullpath is false and retro_load_game() is called:
+    *    - If retro_game_info_ext::file_in_archive is false:
+    *       - retro_game_info_ext::full_path is guaranteed to contain
+    *         a valid path to an existent file
+    *       - retro_game_info_ext::archive_path may be NULL
+    *       - retro_game_info_ext::archive_file may be NULL
+    *       - retro_game_info_ext::dir is guaranteed to contain a
+    *         valid path to the directory in which the content file exists
+    *       - retro_game_info_ext::name is guaranteed to contain the
+    *         basename of the content file, without extension
+    *       - retro_game_info_ext::ext is guaranteed to contain the
+    *         extension of the content file in lower case format
+    *    - If retro_game_info_ext::file_in_archive is true:
+    *       - retro_game_info_ext::full_path may be NULL
+    *       - retro_game_info_ext::archive_path is guaranteed to
+    *         contain a valid path to an existent compressed file
+    *         inside which the content file is located
+    *       - retro_game_info_ext::archive_file is guaranteed to
+    *         contain a valid path to an existent content file
+    *         inside the compressed file referred to by
+    *         retro_game_info_ext::archive_path
+    *            e.g. for a compressed file '/path/to/foo.zip'
+    *            containing 'bar.sfc'
+    *             > retro_game_info_ext::archive_path will be '/path/to/foo.zip'
+    *             > retro_game_info_ext::archive_file will be 'bar.sfc'
+    *       - retro_game_info_ext::dir is guaranteed to contain a
+    *         valid path to the directory in which the compressed file
+    *         (containing the content file) exists
+    *       - retro_game_info_ext::name is guaranteed to contain
+    *         EITHER
+    *         1) the basename of the compressed file (containing
+    *            the content file), without extension
+    *         OR
+    *         2) the basename of the content file inside the
+    *            compressed file, without extension
+    *         In either case, a core should consider 'name' to
+    *         be the canonical name/ID of the the content file
+    *       - retro_game_info_ext::ext is guaranteed to contain the
+    *         extension of the content file inside the compressed file,
+    *         in lower case format
+    *    - retro_game_info_ext::data and retro_game_info_ext::size are
+    *      guaranteed to be valid */
+   bool need_fullpath;
+
+   /* If need_fullpath is false, specifies whether the content
+    * data buffer available in retro_load_game() is 'persistent'
+    *
+    * If persistent_data is false and retro_load_game() is called:
+    *    - retro_game_info::data and retro_game_info::size
+    *      are valid only until retro_load_game() returns
+    *    - retro_game_info_ext::data and retro_game_info_ext::size
+    *      are valid only until retro_load_game() returns
+    *
+    * If persistent_data is true and retro_load_game() is called:
+    *    - retro_game_info::data and retro_game_info::size
+    *      are valid until retro_deinit() returns
+    *    - retro_game_info_ext::data and retro_game_info_ext::size
+    *      are valid until retro_deinit() returns */
+   bool persistent_data;
+};
+
+/* Similar to retro_game_info, but provides extended
+ * information about the source content file and
+ * game memory buffer status.
+ * And array of retro_game_info_ext is returned by
+ * RETRO_ENVIRONMENT_GET_GAME_INFO_EXT
+ * NOTE: In the following descriptions, references to
+ *       retro_load_game() may be replaced with
+ *       retro_load_game_special() */
+struct retro_game_info_ext
+{
+   /* - If file_in_archive is false, contains a valid
+    *   path to an existent content file (UTF-8 encoded)
+    * - If file_in_archive is true, may be NULL */
+   const char *full_path;
+
+   /* - If file_in_archive is false, may be NULL
+    * - If file_in_archive is true, contains a valid path
+    *   to an existent compressed file inside which the
+    *   content file is located (UTF-8 encoded) */
+   const char *archive_path;
+
+   /* - If file_in_archive is false, may be NULL
+    * - If file_in_archive is true, contain a valid path
+    *   to an existent content file inside the compressed
+    *   file referred to by archive_path (UTF-8 encoded)
+    *      e.g. for a compressed file '/path/to/foo.zip'
+    *      containing 'bar.sfc'
+    *      > archive_path will be '/path/to/foo.zip'
+    *      > archive_file will be 'bar.sfc' */
+   const char *archive_file;
+
+   /* - If file_in_archive is false, contains a valid path
+    *   to the directory in which the content file exists
+    *   (UTF-8 encoded)
+    * - If file_in_archive is true, contains a valid path
+    *   to the directory in which the compressed file
+    *   (containing the content file) exists (UTF-8 encoded) */
+   const char *dir;
+
+   /* Contains the canonical name/ID of the content file
+    * (UTF-8 encoded). Intended for use when identifying
+    * 'complementary' content named after the loaded file -
+    * i.e. companion data of a different format (a CD image
+    * required by a ROM), texture packs, internally handled
+    * save files, etc.
+    * - If file_in_archive is false, contains the basename
+    *   of the content file, without extension
+    * - If file_in_archive is true, then string is
+    *   implementation specific. A frontend may choose to
+    *   set a name value of:
+    *   EITHER
+    *   1) the basename of the compressed file (containing
+    *      the content file), without extension
+    *   OR
+    *   2) the basename of the content file inside the
+    *      compressed file, without extension
+    *   RetroArch sets the 'name' value according to (1).
+    *   A frontend that supports routine loading of
+    *   content from archives containing multiple unrelated
+    *   content files may set the 'name' value according
+    *   to (2). */
+   const char *name;
+
+   /* - If file_in_archive is false, contains the extension
+    *   of the content file in lower case format
+    * - If file_in_archive is true, contains the extension
+    *   of the content file inside the compressed file,
+    *   in lower case format */
+   const char *ext;
+
+   /* String of implementation specific meta-data. */
+   const char *meta;
+
+   /* Memory buffer of loaded game content. Will be NULL:
+    * IF
+    * - retro_system_info::need_fullpath is true and
+    *   retro_system_content_info_override::need_fullpath
+    *   is unset
+    * OR
+    * - retro_system_content_info_override::need_fullpath
+    *   is true */
+   const void *data;
+
+   /* Size of game content memory buffer, in bytes */
+   size_t size;
+
+   /* True if loaded content file is inside a compressed
+    * archive */
+   bool file_in_archive;
+
+   /* - If data is NULL, value is unset/ignored
+    * - If data is non-NULL:
+    *   - If persistent_data is false, data and size are
+    *     valid only until retro_load_game() returns
+    *   - If persistent_data is true, data and size are
+    *     are valid until retro_deinit() returns */
+   bool persistent_data;
+};
+
+struct retro_game_geometry
+{
+   unsigned base_width;    /* Nominal video width of game. */
+   unsigned base_height;   /* Nominal video height of game. */
+   unsigned max_width;     /* Maximum possible width of game. */
+   unsigned max_height;    /* Maximum possible height of game. */
+
+   float    aspect_ratio;  /* Nominal aspect ratio of game. If
+                            * aspect_ratio is <= 0.0, an aspect ratio
+                            * of base_width / base_height is assumed.
+                            * A frontend could override this setting,
+                            * if desired. */
+};
+
+struct retro_system_timing
+{
+   double fps;             /* FPS of video content. */
+   double sample_rate;     /* Sampling rate of audio. */
+};
+
+struct retro_system_av_info
+{
+   struct retro_game_geometry geometry;
+   struct retro_system_timing timing;
+};
+
+struct retro_variable
+{
+   /* Variable to query in RETRO_ENVIRONMENT_GET_VARIABLE.
+    * If NULL, obtains the complete environment string if more
+    * complex parsing is necessary.
+    * The environment string is formatted as key-value pairs
+    * delimited by semicolons as so:
+    * "key1=value1;key2=value2;..."
+    */
+   const char *key;
+
+   /* Value to be obtained. If key does not exist, it is set to NULL. */
+   const char *value;
+};
+
+struct retro_core_option_display
+{
+   /* Variable to configure in RETRO_ENVIRONMENT_SET_CORE_OPTIONS_DISPLAY */
+   const char *key;
+
+   /* Specifies whether variable should be displayed
+    * when presenting core options to the user */
+   bool visible;
+};
+
+/* Maximum number of values permitted for a core option
+ * > Note: We have to set a maximum value due the limitations
+ *   of the C language - i.e. it is not possible to create an
+ *   array of structs each containing a variable sized array,
+ *   so the retro_core_option_definition values array must
+ *   have a fixed size. The size limit of 128 is a balancing
+ *   act - it needs to be large enough to support all 'sane'
+ *   core options, but setting it too large may impact low memory
+ *   platforms. In practise, if a core option has more than
+ *   128 values then the implementation is likely flawed.
+ *   To quote the above API reference:
+ *      "The number of possible options should be very limited
+ *       i.e. it should be feasible to cycle through options
+ *       without a keyboard."
+ */
+#define RETRO_NUM_CORE_OPTION_VALUES_MAX 128
+
+struct retro_core_option_value
+{
+   /* Expected option value */
+   const char *value;
+
+   /* Human-readable value label. If NULL, value itself
+    * will be displayed by the frontend */
+   const char *label;
+};
+
+struct retro_core_option_definition
+{
+   /* Variable to query in RETRO_ENVIRONMENT_GET_VARIABLE. */
+   const char *key;
+
+   /* Human-readable core option description (used as menu label) */
+   const char *desc;
+
+   /* Human-readable core option information (used as menu sublabel) */
+   const char *info;
+
+   /* Array of retro_core_option_value structs, terminated by NULL */
+   struct retro_core_option_value values[RETRO_NUM_CORE_OPTION_VALUES_MAX];
+
+   /* Default core option value. Must match one of the values
+    * in the retro_core_option_value array, otherwise will be
+    * ignored */
+   const char *default_value;
+};
+
+#ifdef __PS3__
+#undef local
+#endif
+
+struct retro_core_options_intl
+{
+   /* Pointer to an array of retro_core_option_definition structs
+    * - US English implementation
+    * - Must point to a valid array */
+   struct retro_core_option_definition *us;
+
+   /* Pointer to an array of retro_core_option_definition structs
+    * - Implementation for current frontend language
+    * - May be NULL */
+   struct retro_core_option_definition *local;
+};
+
+struct retro_core_option_v2_category
+{
+   /* Variable uniquely identifying the
+    * option category. Valid key characters
+    * are [a-z, A-Z, 0-9, _, -] */
+   const char *key;
+
+   /* Human-readable category description
+    * > Used as category menu label when
+    *   frontend has core option category
+    *   support */
+   const char *desc;
+
+   /* Human-readable category information
+    * > Used as category menu sublabel when
+    *   frontend has core option category
+    *   support
+    * > Optional (may be NULL or an empty
+    *   string) */
+   const char *info;
+};
+
+struct retro_core_option_v2_definition
+{
+   /* Variable to query in RETRO_ENVIRONMENT_GET_VARIABLE.
+    * Valid key characters are [a-z, A-Z, 0-9, _, -] */
+   const char *key;
+
+   /* Human-readable core option description
+    * > Used as menu label when frontend does
+    *   not have core option category support
+    *   e.g. "Video > Aspect Ratio" */
+   const char *desc;
+
+   /* Human-readable core option description
+    * > Used as menu label when frontend has
+    *   core option category support
+    *   e.g. "Aspect Ratio", where associated
+    *   retro_core_option_v2_category::desc
+    *   is "Video"
+    * > If empty or NULL, the string specified by
+    *   desc will be used as the menu label
+    * > Will be ignored (and may be set to NULL)
+    *   if category_key is empty or NULL */
+   const char *desc_categorized;
+
+   /* Human-readable core option information
+    * > Used as menu sublabel */
+   const char *info;
+
+   /* Human-readable core option information
+    * > Used as menu sublabel when frontend
+    *   has core option category support
+    *   (e.g. may be required when info text
+    *   references an option by name/desc,
+    *   and the desc/desc_categorized text
+    *   for that option differ)
+    * > If empty or NULL, the string specified by
+    *   info will be used as the menu sublabel
+    * > Will be ignored (and may be set to NULL)
+    *   if category_key is empty or NULL */
+   const char *info_categorized;
+
+   /* Variable specifying category (e.g. "video",
+    * "audio") that will be assigned to the option
+    * if frontend has core option category support.
+    * > Categorized options will be displayed in a
+    *   subsection/submenu of the frontend core
+    *   option interface
+    * > Specified string must match one of the
+    *   retro_core_option_v2_category::key values
+    *   in the associated retro_core_option_v2_category
+    *   array; If no match is not found, specified
+    *   string will be considered as NULL
+    * > If specified string is empty or NULL, option will
+    *   have no category and will be shown at the top
+    *   level of the frontend core option interface */
+   const char *category_key;
+
+   /* Array of retro_core_option_value structs, terminated by NULL */
+   struct retro_core_option_value values[RETRO_NUM_CORE_OPTION_VALUES_MAX];
+
+   /* Default core option value. Must match one of the values
+    * in the retro_core_option_value array, otherwise will be
+    * ignored */
+   const char *default_value;
+};
+
+struct retro_core_options_v2
+{
+   /* Array of retro_core_option_v2_category structs,
+    * terminated by NULL
+    * > If NULL, all entries in definitions array
+    *   will have no category and will be shown at
+    *   the top level of the frontend core option
+    *   interface
+    * > Will be ignored if frontend does not have
+    *   core option category support */
+   struct retro_core_option_v2_category *categories;
+
+   /* Array of retro_core_option_v2_definition structs,
+    * terminated by NULL */
+   struct retro_core_option_v2_definition *definitions;
+};
+
+struct retro_core_options_v2_intl
+{
+   /* Pointer to a retro_core_options_v2 struct
+    * > US English implementation
+    * > Must point to a valid struct */
+   struct retro_core_options_v2 *us;
+
+   /* Pointer to a retro_core_options_v2 struct
+    * - Implementation for current frontend language
+    * - May be NULL */
+   struct retro_core_options_v2 *local;
+};
+
+/* Used by the frontend to monitor changes in core option
+ * visibility. May be called each time any core option
+ * value is set via the frontend.
+ * - On each invocation, the core must update the visibility
+ *   of any dynamically hidden options using the
+ *   RETRO_ENVIRONMENT_SET_CORE_OPTIONS_DISPLAY environment
+ *   callback.
+ * - On the first invocation, returns 'true' if the visibility
+ *   of any core option has changed since the last call of
+ *   retro_load_game() or retro_load_game_special().
+ * - On each subsequent invocation, returns 'true' if the
+ *   visibility of any core option has changed since the last
+ *   time the function was called. */
+typedef bool (RETRO_CALLCONV *retro_core_options_update_display_callback_t)(void);
+struct retro_core_options_update_display_callback
+{
+   retro_core_options_update_display_callback_t callback;
+};
+
+struct retro_game_info
+{
+   const char *path;       /* Path to game, UTF-8 encoded.
+                            * Sometimes used as a reference for building other paths.
+                            * May be NULL if game was loaded from stdin or similar,
+                            * but in this case some cores will be unable to load `data`.
+                            * So, it is preferable to fabricate something here instead
+                            * of passing NULL, which will help more cores to succeed.
+                            * retro_system_info::need_fullpath requires
+                            * that this path is valid. */
+   const void *data;       /* Memory buffer of loaded game. Will be NULL
+                            * if need_fullpath was set. */
+   size_t      size;       /* Size of memory buffer. */
+   const char *meta;       /* String of implementation specific meta-data. */
+};
+
+#define RETRO_MEMORY_ACCESS_WRITE (1 << 0)
+   /* The core will write to the buffer provided by retro_framebuffer::data. */
+#define RETRO_MEMORY_ACCESS_READ (1 << 1)
+   /* The core will read from retro_framebuffer::data. */
+#define RETRO_MEMORY_TYPE_CACHED (1 << 0)
+   /* The memory in data is cached.
+    * If not cached, random writes and/or reading from the buffer is expected to be very slow. */
+struct retro_framebuffer
+{
+   void *data;                      /* The framebuffer which the core can render into.
+                                       Set by frontend in GET_CURRENT_SOFTWARE_FRAMEBUFFER.
+                                       The initial contents of data are unspecified. */
+   unsigned width;                  /* The framebuffer width used by the core. Set by core. */
+   unsigned height;                 /* The framebuffer height used by the core. Set by core. */
+   size_t pitch;                    /* The number of bytes between the beginning of a scanline,
+                                       and beginning of the next scanline.
+                                       Set by frontend in GET_CURRENT_SOFTWARE_FRAMEBUFFER. */
+   enum retro_pixel_format format;  /* The pixel format the core must use to render into data.
+                                       This format could differ from the format used in
+                                       SET_PIXEL_FORMAT.
+                                       Set by frontend in GET_CURRENT_SOFTWARE_FRAMEBUFFER. */
+
+   unsigned access_flags;           /* How the core will access the memory in the framebuffer.
+                                       RETRO_MEMORY_ACCESS_* flags.
+                                       Set by core. */
+   unsigned memory_flags;           /* Flags telling core how the memory has been mapped.
+                                       RETRO_MEMORY_TYPE_* flags.
+                                       Set by frontend in GET_CURRENT_SOFTWARE_FRAMEBUFFER. */
+};
+
+/* Used by a libretro core to override the current
+ * fastforwarding mode of the frontend */
+struct retro_fastforwarding_override
+{
+   /* Specifies the runtime speed multiplier that
+    * will be applied when 'fastforward' is true.
+    * For example, a value of 5.0 when running 60 FPS
+    * content will cap the fast-forward rate at 300 FPS.
+    * Note that the target multiplier may not be achieved
+    * if the host hardware has insufficient processing
+    * power.
+    * Setting a value of 0.0 (or greater than 0.0 but
+    * less than 1.0) will result in an uncapped
+    * fast-forward rate (limited only by hardware
+    * capacity).
+    * If the value is negative, it will be ignored
+    * (i.e. the frontend will use a runtime speed
+    * multiplier of its own choosing) */
+   float ratio;
+
+   /* If true, fastforwarding mode will be enabled.
+    * If false, fastforwarding mode will be disabled. */
+   bool fastforward;
+
+   /* If true, and if supported by the frontend, an
+    * on-screen notification will be displayed while
+    * 'fastforward' is true.
+    * If false, and if supported by the frontend, any
+    * on-screen fast-forward notifications will be
+    * suppressed */
+   bool notification;
+
+   /* If true, the core will have sole control over
+    * when fastforwarding mode is enabled/disabled;
+    * the frontend will not be able to change the
+    * state set by 'fastforward' until either
+    * 'inhibit_toggle' is set to false, or the core
+    * is unloaded */
+   bool inhibit_toggle;
+};
+
+/* During normal operation. Rate will be equal to the core's internal FPS. */
+#define RETRO_THROTTLE_NONE              0
+
+/* While paused or stepping single frames. Rate will be 0. */
+#define RETRO_THROTTLE_FRAME_STEPPING    1
+
+/* During fast forwarding.
+ * Rate will be 0 if not specifically limited to a maximum speed. */
+#define RETRO_THROTTLE_FAST_FORWARD      2
+
+/* During slow motion. Rate will be less than the core's internal FPS. */
+#define RETRO_THROTTLE_SLOW_MOTION       3
+
+/* While rewinding recorded save states. Rate can vary depending on the rewind
+ * speed or be 0 if the frontend is not aiming for a specific rate. */
+#define RETRO_THROTTLE_REWINDING         4
+
+/* While vsync is active in the video driver and the target refresh rate is
+ * lower than the core's internal FPS. Rate is the target refresh rate. */
+#define RETRO_THROTTLE_VSYNC             5
+
+/* When the frontend does not throttle in any way. Rate will be 0.
+ * An example could be if no vsync or audio output is active. */
+#define RETRO_THROTTLE_UNBLOCKED         6
+
+struct retro_throttle_state
+{
+   /* The current throttling mode. Should be one of the values above. */
+   unsigned mode;
+
+   /* How many times per second the frontend aims to call retro_run.
+    * Depending on the mode, it can be 0 if there is no known fixed rate.
+    * This won't be accurate if the total processing time of the core and
+    * the frontend is longer than what is available for one frame. */
+   float rate;
+};
+
+/* Callbacks */
+
+/* Environment callback. Gives implementations a way of performing
+ * uncommon tasks. Extensible. */
+typedef bool (RETRO_CALLCONV *retro_environment_t)(unsigned cmd, void *data);
+
+/* Render a frame. Pixel format is 15-bit 0RGB1555 native endian
+ * unless changed (see RETRO_ENVIRONMENT_SET_PIXEL_FORMAT).
+ *
+ * Width and height specify dimensions of buffer.
+ * Pitch specifices length in bytes between two lines in buffer.
+ *
+ * For performance reasons, it is highly recommended to have a frame
+ * that is packed in memory, i.e. pitch == width * byte_per_pixel.
+ * Certain graphic APIs, such as OpenGL ES, do not like textures
+ * that are not packed in memory.
+ */
+typedef void (RETRO_CALLCONV *retro_video_refresh_t)(const void *data, unsigned width,
+      unsigned height, size_t pitch);
+
+/* Renders a single audio frame. Should only be used if implementation
+ * generates a single sample at a time.
+ * Format is signed 16-bit native endian.
+ */
+typedef void (RETRO_CALLCONV *retro_audio_sample_t)(int16_t left, int16_t right);
+
+/* Renders multiple audio frames in one go.
+ *
+ * One frame is defined as a sample of left and right channels, interleaved.
+ * I.e. int16_t buf[4] = { l, r, l, r }; would be 2 frames.
+ * Only one of the audio callbacks must ever be used.
+ */
+typedef size_t (RETRO_CALLCONV *retro_audio_sample_batch_t)(const int16_t *data,
+      size_t frames);
+
+/* Polls input. */
+typedef void (RETRO_CALLCONV *retro_input_poll_t)(void);
+
+/* Queries for input for player 'port'. device will be masked with
+ * RETRO_DEVICE_MASK.
+ *
+ * Specialization of devices such as RETRO_DEVICE_JOYPAD_MULTITAP that
+ * have been set with retro_set_controller_port_device()
+ * will still use the higher level RETRO_DEVICE_JOYPAD to request input.
+ */
+typedef int16_t (RETRO_CALLCONV *retro_input_state_t)(unsigned port, unsigned device,
+      unsigned index, unsigned id);
+
+/* Sets callbacks. retro_set_environment() is guaranteed to be called
+ * before retro_init().
+ *
+ * The rest of the set_* functions are guaranteed to have been called
+ * before the first call to retro_run() is made. */
+RETRO_API void retro_set_environment(retro_environment_t);
+RETRO_API void retro_set_video_refresh(retro_video_refresh_t);
+RETRO_API void retro_set_audio_sample(retro_audio_sample_t);
+RETRO_API void retro_set_audio_sample_batch(retro_audio_sample_batch_t);
+RETRO_API void retro_set_input_poll(retro_input_poll_t);
+RETRO_API void retro_set_input_state(retro_input_state_t);
+
+/* Library global initialization/deinitialization. */
+RETRO_API void retro_init(void);
+RETRO_API void retro_deinit(void);
+
+/* Must return RETRO_API_VERSION. Used to validate ABI compatibility
+ * when the API is revised. */
+RETRO_API unsigned retro_api_version(void);
+
+/* Gets statically known system info. Pointers provided in *info
+ * must be statically allocated.
+ * Can be called at any time, even before retro_init(). */
+RETRO_API void retro_get_system_info(struct retro_system_info *info);
+
+/* Gets information about system audio/video timings and geometry.
+ * Can be called only after retro_load_game() has successfully completed.
+ * NOTE: The implementation of this function might not initialize every
+ * variable if needed.
+ * E.g. geom.aspect_ratio might not be initialized if core doesn't
+ * desire a particular aspect ratio. */
+RETRO_API void retro_get_system_av_info(struct retro_system_av_info *info);
+
+/* Sets device to be used for player 'port'.
+ * By default, RETRO_DEVICE_JOYPAD is assumed to be plugged into all
+ * available ports.
+ * Setting a particular device type is not a guarantee that libretro cores
+ * will only poll input based on that particular device type. It is only a
+ * hint to the libretro core when a core cannot automatically detect the
+ * appropriate input device type on its own. It is also relevant when a
+ * core can change its behavior depending on device type.
+ *
+ * As part of the core's implementation of retro_set_controller_port_device,
+ * the core should call RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS to notify the
+ * frontend if the descriptions for any controls have changed as a
+ * result of changing the device type.
+ */
+RETRO_API void retro_set_controller_port_device(unsigned port, unsigned device);
+
+/* Resets the current game. */
+RETRO_API void retro_reset(void);
+
+/* Runs the game for one video frame.
+ * During retro_run(), input_poll callback must be called at least once.
+ *
+ * If a frame is not rendered for reasons where a game "dropped" a frame,
+ * this still counts as a frame, and retro_run() should explicitly dupe
+ * a frame if GET_CAN_DUPE returns true.
+ * In this case, the video callback can take a NULL argument for data.
+ */
+RETRO_API void retro_run(void);
+
+/* Returns the amount of data the implementation requires to serialize
+ * internal state (save states).
+ * Between calls to retro_load_game() and retro_unload_game(), the
+ * returned size is never allowed to be larger than a previous returned
+ * value, to ensure that the frontend can allocate a save state buffer once.
+ */
+RETRO_API size_t retro_serialize_size(void);
+
+/* Serializes internal state. If failed, or size is lower than
+ * retro_serialize_size(), it should return false, true otherwise. */
+RETRO_API bool retro_serialize(void *data, size_t size);
+RETRO_API bool retro_unserialize(const void *data, size_t size);
+
+RETRO_API void retro_cheat_reset(void);
+RETRO_API void retro_cheat_set(unsigned index, bool enabled, const char *code);
+
+/* Loads a game.
+ * Return true to indicate successful loading and false to indicate load failure.
+ */
+RETRO_API bool retro_load_game(const struct retro_game_info *game);
+
+/* Loads a "special" kind of game. Should not be used,
+ * except in extreme cases. */
+RETRO_API bool retro_load_game_special(
+  unsigned game_type,
+  const struct retro_game_info *info, size_t num_info
+);
+
+/* Unloads the currently loaded game. Called before retro_deinit(void). */
+RETRO_API void retro_unload_game(void);
+
+/* Gets region of game. */
+RETRO_API unsigned retro_get_region(void);
+
+/* Gets region of memory. */
+RETRO_API void *retro_get_memory_data(unsigned id);
+RETRO_API size_t retro_get_memory_size(unsigned id);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/lists/string_list.h b/ThirdParty/RetroArch/libretro-common/include/lists/string_list.h
new file mode 100644
index 000000000..82767713b
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/lists/string_list.h
@@ -0,0 +1,186 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (string_list.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_STRING_LIST_H
+#define __LIBRETRO_SDK_STRING_LIST_H
+
+#include <retro_common_api.h>
+
+#include <boolean.h>
+#include <stdlib.h>
+#include <stddef.h>
+
+RETRO_BEGIN_DECLS
+
+union string_list_elem_attr
+{
+   bool  b;
+   int   i;
+   void *p;
+};
+
+struct string_list_elem
+{
+   char *data;
+   void *userdata;
+   union string_list_elem_attr attr;
+};
+
+struct string_list
+{
+   struct string_list_elem *elems;
+   size_t size;
+   size_t cap;
+};
+
+/**
+ * string_list_find_elem:
+ * @list             : pointer to string list
+ * @elem             : element to find inside the string list.
+ *
+ * Searches for an element (@elem) inside the string list.
+ *
+ * Returns: true (1) if element could be found, otherwise false (0).
+ */
+int string_list_find_elem(const struct string_list *list, const char *elem);
+
+/**
+ * string_list_find_elem_prefix:
+ * @list             : pointer to string list
+ * @prefix           : prefix to append to @elem
+ * @elem             : element to find inside the string list.
+ *
+ * Searches for an element (@elem) inside the string list. Will
+ * also search for the same element prefixed by @prefix.
+ *
+ * Returns: true (1) if element could be found, otherwise false (0).
+ */
+bool string_list_find_elem_prefix(const struct string_list *list,
+      const char *prefix, const char *elem);
+
+/**
+ * string_split:
+ * @str              : string to turn into a string list
+ * @delim            : delimiter character to use for splitting the string.
+ *
+ * Creates a new string list based on string @str, delimited by @delim.
+ *
+ * Returns: new string list if successful, otherwise NULL.
+ */
+struct string_list *string_split(const char *str, const char *delim);
+
+bool string_split_noalloc(struct string_list *list,
+      const char *str, const char *delim);
+
+/**
+ * string_separate:
+ * @str              : string to turn into a string list
+ * @delim            : delimiter character to use for separating the string.
+ *
+ * Creates a new string list based on string @str, delimited by @delim.
+ * Includes empty strings - i.e. two adjacent delimiters will resolve
+ * to a string list element of "".
+ *
+ * Returns: new string list if successful, otherwise NULL.
+ */
+struct string_list *string_separate(char *str, const char *delim);
+
+bool string_separate_noalloc(struct string_list *list, 
+      char *str, const char *delim);
+
+bool string_list_deinitialize(struct string_list *list);
+
+bool string_list_initialize(struct string_list *list);
+
+/**
+ * string_list_new:
+ *
+ * Creates a new string list. Has to be freed manually.
+ *
+ * Returns: new string list if successful, otherwise NULL.
+ */
+struct string_list *string_list_new(void);
+
+/**
+ * string_list_append:
+ * @list             : pointer to string list
+ * @elem             : element to add to the string list
+ * @attr             : attributes of new element.
+ *
+ * Appends a new element to the string list.
+ *
+ * Returns: true (1) if successful, otherwise false (0).
+ **/
+bool string_list_append(struct string_list *list, const char *elem,
+      union string_list_elem_attr attr);
+
+/**
+ * string_list_append_n:
+ * @list             : pointer to string list
+ * @elem             : element to add to the string list
+ * @length           : read at most this many bytes from elem
+ * @attr             : attributes of new element.
+ *
+ * Appends a new element to the string list.
+ *
+ * Returns: true (1) if successful, otherwise false (0).
+ **/
+bool string_list_append_n(struct string_list *list, const char *elem,
+      unsigned length, union string_list_elem_attr attr);
+
+/**
+ * string_list_free
+ * @list             : pointer to string list object
+ *
+ * Frees a string list.
+ */
+void string_list_free(struct string_list *list);
+
+/**
+ * string_list_join_concat:
+ * @buffer           : buffer that @list will be joined to.
+ * @size             : length of @buffer.
+ * @list             : pointer to string list.
+ * @delim            : delimiter character for @list.
+ *
+ * A string list will be joined/concatenated as a
+ * string to @buffer, delimited by @delim.
+ */
+void string_list_join_concat(char *buffer, size_t size,
+      const struct string_list *list, const char *sep);
+
+/**
+ * string_list_set:
+ * @list             : pointer to string list
+ * @idx              : index of element in string list
+ * @str              : value for the element.
+ *
+ * Set value of element inside string list.
+ **/
+void string_list_set(struct string_list *list, unsigned idx,
+      const char *str);
+
+struct string_list *string_list_clone(const struct string_list *src);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/memalign.h b/ThirdParty/RetroArch/libretro-common/include/memalign.h
new file mode 100644
index 000000000..59ffbd743
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/memalign.h
@@ -0,0 +1,40 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (memalign.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_MEMALIGN_H
+#define _LIBRETRO_MEMALIGN_H
+
+#include <stddef.h>
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+void *memalign_alloc(size_t boundary, size_t size);
+
+void *memalign_alloc_aligned(size_t size);
+
+void memalign_free(void *ptr);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/retro_assert.h b/ThirdParty/RetroArch/libretro-common/include/retro_assert.h
new file mode 100644
index 000000000..79dbb32e0
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/retro_assert.h
@@ -0,0 +1,35 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (retro_assert.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __RETRO_ASSERT_H
+#define __RETRO_ASSERT_H
+
+#include <assert.h>
+
+#ifdef RARCH_INTERNAL
+#include <stdio.h>
+#define retro_assert(cond) ((void)( (cond) || (printf("Assertion failed at %s:%d.\n", __FILE__, __LINE__), abort(), 0) ))
+#else
+#define retro_assert(cond) assert(cond)
+#endif
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/retro_common_api.h b/ThirdParty/RetroArch/libretro-common/include/retro_common_api.h
new file mode 100644
index 000000000..0f68b7d98
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/retro_common_api.h
@@ -0,0 +1,119 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (retro_common_api.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_COMMON_RETRO_COMMON_API_H
+#define _LIBRETRO_COMMON_RETRO_COMMON_API_H
+
+/*
+This file is designed to normalize the libretro-common compiling environment
+for public API headers. This should be leaner than a normal compiling environment,
+since it gets #included into other project's sources.
+*/
+
+/* ------------------------------------ */
+
+/*
+Ordinarily we want to put #ifdef __cplusplus extern "C" in C library
+headers to enable them to get used by c++ sources.
+However, we want to support building this library as C++ as well, so a
+special technique is called for.
+*/
+
+#define RETRO_BEGIN_DECLS
+#define RETRO_END_DECLS
+
+#ifdef __cplusplus
+
+#ifdef CXX_BUILD
+/* build wants everything to be built as c++, so no extern "C" */
+#else
+#undef RETRO_BEGIN_DECLS
+#undef RETRO_END_DECLS
+#define RETRO_BEGIN_DECLS extern "C" {
+#define RETRO_END_DECLS }
+#endif
+
+#else
+
+/* header is included by a C source file, so no extern "C" */
+
+#endif
+
+/*
+IMO, this non-standard ssize_t should not be used.
+However, it's a good example of how to handle something like this.
+*/
+#ifdef _MSC_VER
+#ifndef HAVE_SSIZE_T
+#define HAVE_SSIZE_T
+#if defined(_WIN64)
+typedef __int64 ssize_t;
+#elif defined(_WIN32)
+typedef int ssize_t;
+#endif
+#endif
+#elif defined(__MACH__)
+#include <sys/types.h>
+#endif
+
+#ifdef _MSC_VER
+#if _MSC_VER >= 1800
+#include <inttypes.h>
+#else
+#ifndef PRId64
+#define PRId64 "I64d"
+#define PRIu64 "I64u"
+#define PRIuPTR "Iu"
+#endif
+#endif
+#else
+/* C++11 says this one isn't needed, but apparently (some versions of) mingw require it anyways */
+/* https://stackoverflow.com/questions/8132399/how-to-printf-uint64-t-fails-with-spurious-trailing-in-format */
+/* https://github.com/libretro/RetroArch/issues/6009 */
+#ifndef __STDC_FORMAT_MACROS
+#define __STDC_FORMAT_MACROS 1
+#endif
+#include <inttypes.h>
+#endif
+#ifndef PRId64
+#error "inttypes.h is being screwy"
+#endif
+#define STRING_REP_INT64 "%" PRId64
+#define STRING_REP_UINT64 "%" PRIu64
+#define STRING_REP_USIZE "%" PRIuPTR
+
+/*
+I would like to see retro_inline.h moved in here; possibly boolean too.
+
+rationale: these are used in public APIs, and it is easier to find problems
+and write code that works the first time portably when theyre included uniformly
+than to do the analysis from scratch each time you think you need it, for each feature.
+
+Moreover it helps force you to make hard decisions: if you EVER bring in boolean.h,
+then you should pay the price everywhere, so you can see how much grief it will cause.
+
+Of course, another school of thought is that you should do as little damage as possible
+in as few places as possible...
+*/
+
+/* _LIBRETRO_COMMON_RETRO_COMMON_API_H */
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/retro_environment.h b/ThirdParty/RetroArch/libretro-common/include/retro_environment.h
new file mode 100644
index 000000000..1389eb5c0
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/retro_environment.h
@@ -0,0 +1,114 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (retro_environment.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_ENVIRONMENT_H
+#define __LIBRETRO_SDK_ENVIRONMENT_H
+
+/*
+This file is designed to create a normalized environment for compiling
+libretro-common's private implementations, or any other sources which might
+enjoy use of it's environment (RetroArch for instance).
+This should be an elaborately crafted environment so that sources don't
+need to be full of platform-specific workarounds.
+*/
+
+#if defined (__cplusplus)
+#if 0
+printf("This is C++, version %d.\n", __cplusplus);
+#endif
+/* The expected values would be
+ *   199711L, for ISO/IEC 14882:1998 or 14882:2003
+ */
+
+#elif defined(__STDC__)
+/* This is standard C. */
+
+#if (__STDC__ == 1)
+/* The implementation is ISO-conforming. */
+#define __STDC_ISO__
+#else
+/* The implementation is not ISO-conforming. */
+#endif
+
+#if defined(__STDC_VERSION__)
+#if (__STDC_VERSION__ >= 201112L)
+/* This is C11. */
+#define __STDC_C11__
+#elif (__STDC_VERSION__ >= 199901L)
+/* This is C99. */
+#define __STDC_C99__
+#elif (__STDC_VERSION__ >= 199409L)
+/* This is C89 with amendment 1. */
+#define __STDC_C89__
+#define __STDC_C89_AMENDMENT_1__
+#else
+/* This is C89 without amendment 1. */
+#define __STDC_C89__
+#endif
+#else /* !defined(__STDC_VERSION__) */
+/* This is C89. __STDC_VERSION__ is not defined. */
+#define __STDC_C89__
+#endif
+
+#else   /* !defined(__STDC__) */
+/* This is not standard C. __STDC__ is not defined. */
+#endif
+
+#if defined(WIN32) || defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
+/* Try to find out if we're compiling for WinRT or non-WinRT */
+#if defined(_MSC_VER) && defined(__has_include)
+#if __has_include(<winapifamily.h>)
+#define HAVE_WINAPIFAMILY_H 1
+#else
+#define HAVE_WINAPIFAMILY_H 0
+#endif
+
+/* If _USING_V110_SDK71_ is defined it means we are using the Windows XP toolset. */
+#elif defined(_MSC_VER) && (_MSC_VER >= 1700 && !_USING_V110_SDK71_)    /* _MSC_VER == 1700 for Visual Studio 2012 */
+#define HAVE_WINAPIFAMILY_H 1
+#else
+#define HAVE_WINAPIFAMILY_H 0
+#endif
+
+#if HAVE_WINAPIFAMILY_H
+#include <winapifamily.h>
+#define WINAPI_FAMILY_WINRT (!WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP))
+#else
+#define WINAPI_FAMILY_WINRT 0
+#endif /* HAVE_WINAPIFAMILY_H */
+
+#if WINAPI_FAMILY_WINRT
+#undef __WINRT__
+#define __WINRT__ 1
+#endif
+
+/* MSVC obviously has to have some non-standard constants... */
+#if _M_IX86_FP == 1
+#define __SSE__ 1
+#elif _M_IX86_FP == 2 || (defined(_M_AMD64) || defined(_M_X64))
+#define __SSE__ 1
+#define __SSE2__ 1
+#endif
+
+#endif
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/retro_inline.h b/ThirdParty/RetroArch/libretro-common/include/retro_inline.h
new file mode 100644
index 000000000..b27d6dd6d
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/retro_inline.h
@@ -0,0 +1,39 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (retro_inline.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_INLINE_H
+#define __LIBRETRO_SDK_INLINE_H
+
+#ifndef INLINE
+
+#if defined(_WIN32) || defined(__INTEL_COMPILER)
+#define INLINE __inline
+#elif defined(__STDC_VERSION__) && __STDC_VERSION__>=199901L
+#define INLINE inline
+#elif defined(__GNUC__)
+#define INLINE __inline__
+#else
+#define INLINE
+#endif
+
+#endif
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/retro_math.h b/ThirdParty/RetroArch/libretro-common/include/retro_math.h
new file mode 100644
index 000000000..d1cb86294
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/retro_math.h
@@ -0,0 +1,190 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (retro_math.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_COMMON_MATH_H
+#define _LIBRETRO_COMMON_MATH_H
+
+#include <stdint.h>
+
+#if defined(_WIN32) && !defined(_XBOX)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#elif defined(_WIN32) && defined(_XBOX)
+#include <Xtl.h>
+#endif
+
+#include <limits.h>
+
+#ifdef _MSC_VER
+#include <compat/msvc.h>
+#endif
+#include <retro_inline.h>
+
+#ifndef M_PI
+#if !defined(USE_MATH_DEFINES)
+#define M_PI 3.14159265358979323846264338327
+#endif
+#endif
+
+#ifndef MAX
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
+#ifndef MIN
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
+/**
+ * next_pow2:
+ * @v         : initial value
+ *
+ * Get next power of 2 value based on  initial value.
+ *
+ * Returns: next power of 2 value (derived from @v).
+ **/
+static INLINE uint32_t next_pow2(uint32_t v)
+{
+   v--;
+   v |= v >> 1;
+   v |= v >> 2;
+   v |= v >> 4;
+   v |= v >> 8;
+   v |= v >> 16;
+   v++;
+   return v;
+}
+
+/**
+ * prev_pow2:
+ * @v         : initial value
+ *
+ * Get previous power of 2 value based on initial value.
+ *
+ * Returns: previous power of 2 value (derived from @v).
+ **/
+static INLINE uint32_t prev_pow2(uint32_t v)
+{
+   v |= v >> 1;
+   v |= v >> 2;
+   v |= v >> 4;
+   v |= v >> 8;
+   v |= v >> 16;
+   return v - (v >> 1);
+}
+
+/**
+ * clamp:
+ * @v         : initial value
+ *
+ * Get the clamped value based on initial value.
+ *
+ * Returns: clamped value (derived from @v).
+ **/
+static INLINE float clamp_value(float v, float min, float max)
+{
+   return v <= min ? min : v >= max ? max : v;
+}
+
+/**
+ * saturate_value:
+ * @v         : initial value
+ *
+ * Get the clamped 0.0-1.0 value based on initial value.
+ *
+ * Returns: clamped 0.0-1.0 value (derived from @v).
+ **/
+static INLINE float saturate_value(float v)
+{
+   return clamp_value(v, 0.0f, 1.0f);
+}
+
+/**
+ * dot_product:
+ * @a         : left hand vector value
+ * @b         : right hand vector value
+ *
+ * Get the dot product of the two passed in vectors.
+ *
+ * Returns: dot product value (derived from @a and @b).
+ **/
+static INLINE float dot_product(const float* a, const float* b) 
+{
+   return (a[0] * b[0]) + (a[1] * b[1]) + (a[2] * b[2]);
+}
+
+/**
+ * convert_rgb_to_yxy:
+ * @rgb         : in RGB colour space value
+ * @Yxy         : out Yxy colour space value
+ *
+ * Convert from RGB colour space to Yxy colour space.
+ *
+ * Returns: Yxy colour space value (derived from @rgb).
+ **/
+static INLINE void convert_rgb_to_yxy(const float* rgb, float* Yxy) 
+{
+   float inv;
+   float xyz[3];
+   float one[3]        = {1.0, 1.0, 1.0};
+   float rgb_xyz[3][3] = {
+      {0.4124564, 0.3575761, 0.1804375},
+      {0.2126729, 0.7151522, 0.0721750},
+      {0.0193339, 0.1191920, 0.9503041}
+   };
+
+   xyz[0]              = dot_product(rgb_xyz[0], rgb);
+   xyz[1]              = dot_product(rgb_xyz[1], rgb);
+   xyz[2]              = dot_product(rgb_xyz[2], rgb);
+
+   inv                 = 1.0f / dot_product(xyz, one);
+   Yxy[0]              = xyz[1]; 
+   Yxy[1]              = xyz[0] * inv;
+   Yxy[2]              = xyz[1] * inv;
+}
+ 
+/**
+ * convert_yxy_to_rgb:
+ * @rgb         : in Yxy colour space value
+ * @Yxy         : out rgb colour space value
+ *
+ * Convert from Yxy colour space to rgb colour space.
+ *
+ * Returns: rgb colour space value (derived from @Yxy).
+ **/
+static INLINE void convert_yxy_to_rgb(const float* Yxy, float* rgb)
+{
+   float xyz[3];
+   float xyz_rgb[3][3] = {
+      {3.2404542, -1.5371385, -0.4985314},
+      {-0.9692660, 1.8760108,  0.0415560},
+      {0.0556434, -0.2040259, 1.0572252}
+   };
+   xyz[0]              = Yxy[0] * Yxy[1] / Yxy[2];
+   xyz[1]              = Yxy[0];
+   xyz[2]              = Yxy[0] * (1.0 - Yxy[1] - Yxy[2]) / Yxy[2];
+
+   rgb[0]              = dot_product(xyz_rgb[0], xyz);
+   rgb[1]              = dot_product(xyz_rgb[1], xyz);
+   rgb[2]              = dot_product(xyz_rgb[2], xyz);
+}
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/retro_miscellaneous.h b/ThirdParty/RetroArch/libretro-common/include/retro_miscellaneous.h
new file mode 100644
index 000000000..bd71c916c
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/retro_miscellaneous.h
@@ -0,0 +1,207 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (retro_miscellaneous.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __RARCH_MISCELLANEOUS_H
+#define __RARCH_MISCELLANEOUS_H
+
+#define RARCH_MAX_SUBSYSTEMS 10
+#define RARCH_MAX_SUBSYSTEM_ROMS 10
+
+#include <stdint.h>
+#include <boolean.h>
+#include <retro_inline.h>
+
+#if defined(_WIN32)
+
+#if defined(_XBOX)
+#include <Xtl.h>
+#else
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#endif
+
+#endif
+
+#include <limits.h>
+
+#ifdef _MSC_VER
+#include <compat/msvc.h>
+#endif
+
+static INLINE void bits_or_bits(uint32_t *a, uint32_t *b, uint32_t count)
+{
+   uint32_t i;
+   for (i = 0; i < count;i++)
+      a[i] |= b[i];
+}
+
+static INLINE void bits_clear_bits(uint32_t *a, uint32_t *b, uint32_t count)
+{
+   uint32_t i;
+   for (i = 0; i < count;i++)
+      a[i] &= ~b[i];
+}
+
+static INLINE bool bits_any_set(uint32_t* ptr, uint32_t count)
+{
+   uint32_t i;
+   for (i = 0; i < count; i++)
+   {
+      if (ptr[i] != 0)
+         return true;
+   }
+   return false;
+}
+
+#ifndef PATH_MAX_LENGTH
+#if defined(_XBOX1) || defined(_3DS) || defined(PSP) || defined(PS2) || defined(GEKKO)|| defined(WIIU) || defined(ORBIS) || defined(__PSL1GHT__) || defined(__PS3__)
+#define PATH_MAX_LENGTH 512
+#else
+#define PATH_MAX_LENGTH 4096
+#endif
+#endif
+
+#ifndef NAME_MAX_LENGTH
+#define NAME_MAX_LENGTH 256
+#endif
+
+#ifndef MAX
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
+#ifndef MIN
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
+#define ARRAY_SIZE(a)              (sizeof(a) / sizeof((a)[0]))
+
+#define BITS_GET_ELEM(a, i)        ((a).data[i])
+#define BITS_GET_ELEM_PTR(a, i)    ((a)->data[i])
+
+#define BIT_SET(a, bit)   ((a)[(bit) >> 3] |=  (1 << ((bit) & 7)))
+#define BIT_CLEAR(a, bit) ((a)[(bit) >> 3] &= ~(1 << ((bit) & 7)))
+#define BIT_GET(a, bit)   (((a)[(bit) >> 3] >> ((bit) & 7)) & 1)
+
+#define BIT16_SET(a, bit)    ((a) |=  (1 << ((bit) & 15)))
+#define BIT16_CLEAR(a, bit)  ((a) &= ~(1 << ((bit) & 15)))
+#define BIT16_GET(a, bit)    (((a) >> ((bit) & 15)) & 1)
+#define BIT16_CLEAR_ALL(a)   ((a) = 0)
+
+#define BIT32_SET(a, bit)    ((a) |=  (UINT32_C(1) << ((bit) & 31)))
+#define BIT32_CLEAR(a, bit)  ((a) &= ~(UINT32_C(1) << ((bit) & 31)))
+#define BIT32_GET(a, bit)    (((a) >> ((bit) & 31)) & 1)
+#define BIT32_CLEAR_ALL(a)   ((a) = 0)
+
+#define BIT64_SET(a, bit)    ((a) |=  (UINT64_C(1) << ((bit) & 63)))
+#define BIT64_CLEAR(a, bit)  ((a) &= ~(UINT64_C(1) << ((bit) & 63)))
+#define BIT64_GET(a, bit)    (((a) >> ((bit) & 63)) & 1)
+#define BIT64_CLEAR_ALL(a)   ((a) = 0)
+
+#define BIT128_SET(a, bit)   ((a).data[(bit) >> 5] |=  (UINT32_C(1) << ((bit) & 31)))
+#define BIT128_CLEAR(a, bit) ((a).data[(bit) >> 5] &= ~(UINT32_C(1) << ((bit) & 31)))
+#define BIT128_GET(a, bit)   (((a).data[(bit) >> 5] >> ((bit) & 31)) & 1)
+#define BIT128_CLEAR_ALL(a)  memset(&(a), 0, sizeof(a))
+
+#define BIT128_SET_PTR(a, bit)   BIT128_SET(*a, bit)
+#define BIT128_CLEAR_PTR(a, bit) BIT128_CLEAR(*a, bit)
+#define BIT128_GET_PTR(a, bit)   BIT128_GET(*a, bit)
+#define BIT128_CLEAR_ALL_PTR(a)  BIT128_CLEAR_ALL(*a)
+
+#define BIT256_SET(a, bit)       BIT128_SET(a, bit)
+#define BIT256_CLEAR(a, bit)     BIT128_CLEAR(a, bit)
+#define BIT256_GET(a, bit)       BIT128_GET(a, bit)
+#define BIT256_CLEAR_ALL(a)      BIT128_CLEAR_ALL(a)
+
+#define BIT256_SET_PTR(a, bit)   BIT256_SET(*a, bit)
+#define BIT256_CLEAR_PTR(a, bit) BIT256_CLEAR(*a, bit)
+#define BIT256_GET_PTR(a, bit)   BIT256_GET(*a, bit)
+#define BIT256_CLEAR_ALL_PTR(a)  BIT256_CLEAR_ALL(*a)
+
+#define BIT512_SET(a, bit)       BIT256_SET(a, bit)
+#define BIT512_CLEAR(a, bit)     BIT256_CLEAR(a, bit)
+#define BIT512_GET(a, bit)       BIT256_GET(a, bit)
+#define BIT512_CLEAR_ALL(a)      BIT256_CLEAR_ALL(a)
+
+#define BIT512_SET_PTR(a, bit)   BIT512_SET(*a, bit)
+#define BIT512_CLEAR_PTR(a, bit) BIT512_CLEAR(*a, bit)
+#define BIT512_GET_PTR(a, bit)   BIT512_GET(*a, bit)
+#define BIT512_CLEAR_ALL_PTR(a)  BIT512_CLEAR_ALL(*a)
+
+#define BITS_COPY16_PTR(a,bits) \
+{ \
+   BIT128_CLEAR_ALL_PTR(a); \
+   BITS_GET_ELEM_PTR(a, 0) = (bits) & 0xffff; \
+}
+
+#define BITS_COPY32_PTR(a,bits) \
+{ \
+   BIT128_CLEAR_ALL_PTR(a); \
+   BITS_GET_ELEM_PTR(a, 0) = (bits); \
+}
+
+#define BITS_COPY64_PTR(a,bits) \
+{ \
+   BIT128_CLEAR_ALL_PTR(a); \
+   BITS_GET_ELEM_PTR(a, 0) = (bits); \
+   BITS_GET_ELEM_PTR(a, 1) = (bits >> 32); \
+}
+
+/* Helper macros and struct to keep track of many booleans. */
+/* This struct has 256 bits. */
+typedef struct
+{
+   uint32_t data[8];
+} retro_bits_t;
+
+/* This struct has 512 bits. */
+typedef struct
+{
+   uint32_t data[16];
+} retro_bits_512_t;
+
+#ifdef _WIN32
+#  ifdef _WIN64
+#    define PRI_SIZET PRIu64
+#  else
+#    if _MSC_VER == 1800
+#      define PRI_SIZET PRIu32
+#    else
+#      define PRI_SIZET "u"
+#    endif
+#  endif
+#elif defined(PS2)
+#  define PRI_SIZET "u"
+#else
+#  if (SIZE_MAX == 0xFFFF)
+#    define PRI_SIZET "hu"
+#  elif (SIZE_MAX == 0xFFFFFFFF)
+#    define PRI_SIZET "u"
+#  elif (SIZE_MAX == 0xFFFFFFFFFFFFFFFF)
+#    define PRI_SIZET "lu"
+#  else
+#    error PRI_SIZET: unknown SIZE_MAX
+#  endif
+#endif
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/retro_timers.h b/ThirdParty/RetroArch/libretro-common/include/retro_timers.h
new file mode 100644
index 000000000..e5f74d02d
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/retro_timers.h
@@ -0,0 +1,112 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (retro_timers.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_COMMON_TIMERS_H
+#define __LIBRETRO_COMMON_TIMERS_H
+
+#include <stdint.h>
+
+#if defined(XENON)
+#include <time/time.h>
+#elif !defined(__PSL1GHT__) && defined(__PS3__)
+#include <sys/timer.h>
+#elif defined(GEKKO) || defined(__PSL1GHT__) || defined(__QNX__)
+#include <unistd.h>
+#elif defined(WIIU)
+#include <wiiu/os/thread.h>
+#elif defined(PSP)
+#include <pspthreadman.h>
+#elif defined(VITA)
+#include <psp2/kernel/threadmgr.h>
+#elif defined(_3DS)
+#include <3ds.h>
+#else
+#include <time.h>
+#endif
+
+#if defined(_WIN32) && !defined(_XBOX)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#elif defined(_WIN32) && defined(_XBOX)
+#include <Xtl.h>
+#endif
+
+#include <limits.h>
+
+#ifdef _MSC_VER
+#include <compat/msvc.h>
+#endif
+#include <retro_inline.h>
+
+#ifdef DJGPP
+#define timespec timeval
+#define tv_nsec tv_usec
+#include <unistd.h>
+
+extern int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
+
+static int nanosleepDOS(const struct timespec *rqtp, struct timespec *rmtp)
+{
+   usleep(1000000L * rqtp->tv_sec + rqtp->tv_nsec / 1000);
+
+   if (rmtp)
+      rmtp->tv_sec = rmtp->tv_nsec=0;
+
+   return 0;
+}
+
+#define nanosleep nanosleepDOS
+#endif
+
+/**
+ * retro_sleep:
+ * @msec         : amount in milliseconds to sleep
+ *
+ * Sleeps for a specified amount of milliseconds (@msec).
+ **/
+#if defined(PSP) || defined(VITA)
+#define retro_sleep(msec) (sceKernelDelayThread(1000 * (msec)))
+#elif defined(_3DS)
+#define retro_sleep(msec) (svcSleepThread(1000000 * (s64)(msec)))
+#elif defined(__WINRT__) || defined(WINAPI_FAMILY) && WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
+#define retro_sleep(msec) (SleepEx((msec), FALSE))
+#elif defined(_WIN32)
+#define retro_sleep(msec) (Sleep((msec)))
+#elif defined(XENON)
+#define retro_sleep(msec) (udelay(1000 * (msec)))
+#elif !defined(__PSL1GHT__) && defined(__PS3__)
+#define retro_sleep(msec) (sys_timer_usleep(1000 * (msec)))
+#elif defined(GEKKO) || defined(__PSL1GHT__) || defined(__QNX__)
+#define retro_sleep(msec) (usleep(1000 * (msec)))
+#elif defined(WIIU)
+#define retro_sleep(msec) (OSSleepTicks(ms_to_ticks((msec))))
+#else
+#define retro_sleep(msec) \
+{ \
+   struct timespec tv = {0}; \
+   tv.tv_sec          = msec / 1000; \
+   tv.tv_nsec         = (msec % 1000) * 1000000; \
+   nanosleep(&tv, NULL); \
+}
+#endif
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/streams/file_stream.h b/ThirdParty/RetroArch/libretro-common/include/streams/file_stream.h
new file mode 100644
index 000000000..5276f87a2
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/streams/file_stream.h
@@ -0,0 +1,117 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (file_stream.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_FILE_STREAM_H
+#define __LIBRETRO_SDK_FILE_STREAM_H
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stddef.h>
+
+#include <sys/types.h>
+
+#include <libretro.h>
+#include <retro_common_api.h>
+#include <retro_inline.h>
+#include <boolean.h>
+
+#include <stdarg.h>
+#include <vfs/vfs_implementation.h>
+
+#define FILESTREAM_REQUIRED_VFS_VERSION 2
+
+RETRO_BEGIN_DECLS
+
+typedef struct RFILE RFILE;
+
+#define FILESTREAM_REQUIRED_VFS_VERSION 2
+
+void filestream_vfs_init(const struct retro_vfs_interface_info* vfs_info);
+
+int64_t filestream_get_size(RFILE *stream);
+
+int64_t filestream_truncate(RFILE *stream, int64_t length);
+
+/**
+ * filestream_open:
+ * @path               : path to file
+ * @mode               : file mode to use when opening (read/write)
+ * @bufsize            : optional buffer size (-1 or 0 to use default)
+ *
+ * Opens a file for reading or writing, depending on the requested mode.
+ * Returns a pointer to an RFILE if opened successfully, otherwise NULL.
+ **/
+RFILE* filestream_open(const char *path, unsigned mode, unsigned hints);
+
+int64_t filestream_seek(RFILE *stream, int64_t offset, int seek_position);
+
+int64_t filestream_read(RFILE *stream, void *data, int64_t len);
+
+int64_t filestream_write(RFILE *stream, const void *data, int64_t len);
+
+int64_t filestream_tell(RFILE *stream);
+
+void filestream_rewind(RFILE *stream);
+
+int filestream_close(RFILE *stream);
+
+int64_t filestream_read_file(const char *path, void **buf, int64_t *len);
+
+char* filestream_gets(RFILE *stream, char *s, size_t len);
+
+int filestream_getc(RFILE *stream);
+
+int filestream_vscanf(RFILE *stream, const char* format, va_list *args);
+
+int filestream_scanf(RFILE *stream, const char* format, ...);
+
+int filestream_eof(RFILE *stream);
+
+bool filestream_write_file(const char *path, const void *data, int64_t size);
+
+int filestream_putc(RFILE *stream, int c);
+
+int filestream_vprintf(RFILE *stream, const char* format, va_list args);
+
+int filestream_printf(RFILE *stream, const char* format, ...);
+
+int filestream_error(RFILE *stream);
+
+int filestream_flush(RFILE *stream);
+
+int filestream_delete(const char *path);
+
+int filestream_rename(const char *old_path, const char *new_path);
+
+const char* filestream_get_path(RFILE *stream);
+
+bool filestream_exists(const char *path);
+
+/* Returned pointer must be freed by the caller. */
+char* filestream_getline(RFILE *stream);
+
+libretro_vfs_implementation_file* filestream_get_vfs_handle(RFILE *stream);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/string/stdstring.h b/ThirdParty/RetroArch/libretro-common/include/string/stdstring.h
new file mode 100644
index 000000000..2b6ad2e50
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/string/stdstring.h
@@ -0,0 +1,269 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (stdstring.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_STDSTRING_H
+#define __LIBRETRO_SDK_STDSTRING_H
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <ctype.h>
+#include <string.h>
+#include <boolean.h>
+
+#include <retro_common_api.h>
+#include <retro_inline.h>
+#include <compat/strl.h>
+
+RETRO_BEGIN_DECLS
+
+#define STRLEN_CONST(x)                   ((sizeof((x))-1))
+
+#define strcpy_literal(a, b)              strcpy(a, b)
+
+#define string_is_not_equal(a, b)         !string_is_equal((a), (b))
+
+#define string_is_not_equal_fast(a, b, size) (memcmp(a, b, size) != 0)
+#define string_is_equal_fast(a, b, size)     (memcmp(a, b, size) == 0)
+
+#define TOLOWER(c)   ((c) |  (lr_char_props[(unsigned char)(c)] & 0x20))
+#define TOUPPER(c)   ((c) & ~(lr_char_props[(unsigned char)(c)] & 0x20))
+
+/* C standard says \f \v are space, but this one disagrees */
+#define ISSPACE(c)   (lr_char_props[(unsigned char)(c)] & 0x80) 
+
+#define ISDIGIT(c)   (lr_char_props[(unsigned char)(c)] & 0x40)
+#define ISALPHA(c)   (lr_char_props[(unsigned char)(c)] & 0x20)
+#define ISLOWER(c)   (lr_char_props[(unsigned char)(c)] & 0x04)
+#define ISUPPER(c)   (lr_char_props[(unsigned char)(c)] & 0x02)
+#define ISALNUM(c)   (lr_char_props[(unsigned char)(c)] & 0x60)
+#define ISUALPHA(c)  (lr_char_props[(unsigned char)(c)] & 0x28)
+#define ISUALNUM(c)  (lr_char_props[(unsigned char)(c)] & 0x68)
+#define IS_XDIGIT(c) (lr_char_props[(unsigned char)(c)] & 0x01)
+
+/* Deprecated alias, all callers should use string_is_equal_case_insensitive instead */
+#define string_is_equal_noncase string_is_equal_case_insensitive
+
+static INLINE bool string_is_empty(const char *data)
+{
+   return !data || (*data == '\0');
+}
+
+static INLINE bool string_is_equal(const char *a, const char *b)
+{
+   return (a && b) ? !strcmp(a, b) : false;
+}
+
+static INLINE bool string_starts_with_size(const char *str, const char *prefix,
+      size_t size)
+{
+   return (str && prefix) ? !strncmp(prefix, str, size) : false;
+}
+
+static INLINE bool string_starts_with(const char *str, const char *prefix)
+{
+   return (str && prefix) ? !strncmp(prefix, str, strlen(prefix)) : false;
+}
+
+static INLINE bool string_ends_with_size(const char *str, const char *suffix,
+      size_t str_len, size_t suffix_len)
+{
+   return (str_len < suffix_len) ? false :
+         !memcmp(suffix, str + (str_len - suffix_len), suffix_len);
+}
+
+static INLINE bool string_ends_with(const char *str, const char *suffix)
+{
+   if (!str || !suffix)
+      return false;
+   return string_ends_with_size(str, suffix, strlen(str), strlen(suffix));
+}
+
+/* Returns the length of 'str' (c.f. strlen()), but only
+ * checks the first 'size' characters
+ * - If 'str' is NULL, returns 0
+ * - If 'str' is not NULL and no '\0' character is found
+ *   in the first 'size' characters, returns 'size' */
+static INLINE size_t strlen_size(const char *str, size_t size)
+{
+   size_t i = 0;
+   if (str)
+      while (i < size && str[i]) i++;
+   return i;
+}
+
+
+static INLINE bool string_is_equal_case_insensitive(const char *a,
+      const char *b)
+{
+   int result              = 0;
+   const unsigned char *p1 = (const unsigned char*)a;
+   const unsigned char *p2 = (const unsigned char*)b;
+
+   if (!a || !b)
+      return false;
+   if (p1 == p2)
+      return true;
+
+   while ((result = tolower (*p1) - tolower (*p2++)) == 0)
+      if (*p1++ == '\0')
+         break;
+
+   return (result == 0);
+}
+
+static INLINE bool string_starts_with_case_insensitive(const char *str,
+      const char *prefix)
+{
+   int result              = 0;
+   const unsigned char *p1 = (const unsigned char*)str;
+   const unsigned char *p2 = (const unsigned char*)prefix;
+
+   if (!str || !prefix)
+      return false;
+   if (p1 == p2)
+      return true;
+
+   while ((result = tolower (*p1++) - tolower (*p2)) == 0)
+      if (*p2++ == '\0')
+         break;
+
+   return (result == 0 || *p2 == '\0');
+}
+
+char *string_to_upper(char *s);
+
+char *string_to_lower(char *s);
+
+char *string_ucwords(char *s);
+
+char *string_replace_substring(const char *in, const char *pattern,
+      const char *by);
+
+/* Remove leading whitespaces */
+char *string_trim_whitespace_left(char *const s);
+
+/* Remove trailing whitespaces */
+char *string_trim_whitespace_right(char *const s);
+
+/* Remove leading and trailing whitespaces */
+char *string_trim_whitespace(char *const s);
+
+/*
+ * Wraps string specified by 'src' to destination buffer
+ * specified by 'dst' and 'dst_size'.
+ * This function assumes that all glyphs in the string
+ * have an on-screen pixel width similar to that of
+ * regular Latin characters - i.e. it will not wrap
+ * correctly any text containing so-called 'wide' Unicode
+ * characters (e.g. CJK languages, emojis, etc.).
+ *
+ * @param dst             pointer to destination buffer.
+ * @param dst_size        size of destination buffer.
+ * @param src             pointer to input string.
+ * @param line_width      max number of characters per line.
+ * @param wideglyph_width not used, but is necessary to keep
+ *                        compatibility with word_wrap_wideglyph().
+ * @param max_lines       max lines of destination string.
+ *                        0 means no limit.
+ */
+void word_wrap(char *dst, size_t dst_size, const char *src,
+      int line_width, int wideglyph_width, unsigned max_lines);
+
+/*
+ * Wraps string specified by 'src' to destination buffer
+ * specified by 'dst' and 'dst_size'.
+ * This function assumes that all glyphs in the string
+ * are:
+ * - EITHER 'non-wide' Unicode glyphs, with an on-screen
+ *   pixel width similar to that of regular Latin characters
+ * - OR 'wide' Unicode glyphs (e.g. CJK languages, emojis, etc.)
+ *   with an on-screen pixel width defined by 'wideglyph_width'
+ * Note that wrapping may occur in inappropriate locations
+ * if 'src' string contains 'wide' Unicode characters whose
+ * on-screen pixel width deviates greatly from the set
+ * 'wideglyph_width' value.
+ *
+ * @param dst             pointer to destination buffer.
+ * @param dst_size        size of destination buffer.
+ * @param src             pointer to input string.
+ * @param line_width      max number of characters per line.
+ * @param wideglyph_width effective width of 'wide' Unicode glyphs.
+ *                        the value here is normalised relative to the
+ *                        typical on-screen pixel width of a regular
+ *                        Latin character:
+ *                        - a regular Latin character is defined to
+ *                          have an effective width of 100
+ *                        - wideglyph_width = 100 * (wide_character_pixel_width / latin_character_pixel_width)
+ *                        - e.g. if 'wide' Unicode characters in 'src'
+ *                          have an on-screen pixel width twice that of
+ *                          regular Latin characters, wideglyph_width
+ *                          would be 200
+ * @param max_lines       max lines of destination string.
+ *                        0 means no limit.
+ */
+void word_wrap_wideglyph(char *dst, size_t dst_size, const char *src,
+      int line_width, int wideglyph_width, unsigned max_lines);
+
+/* Splits string into tokens seperated by 'delim'
+ * > Returned token string must be free()'d
+ * > Returns NULL if token is not found
+ * > After each call, 'str' is set to the position after the
+ *   last found token
+ * > Tokens *include* empty strings
+ * Usage example:
+ *    char *str      = "1,2,3,4,5,6,7,,,10,";
+ *    char **str_ptr = &str;
+ *    char *token    = NULL;
+ *    while ((token = string_tokenize(str_ptr, ",")))
+ *    {
+ *        printf("%s\n", token);
+ *        free(token);
+ *        token = NULL;
+ *    }
+ */
+char* string_tokenize(char **str, const char *delim);
+
+/* Removes every instance of character 'c' from 'str' */
+void string_remove_all_chars(char *str, char c);
+
+/* Replaces every instance of character 'find' in 'str'
+ * with character 'replace' */
+void string_replace_all_chars(char *str, char find, char replace);
+
+/* Converts string to unsigned integer.
+ * Returns 0 if string is invalid  */
+unsigned string_to_unsigned(const char *str);
+
+/* Converts hexadecimal string to unsigned integer.
+ * Handles optional leading '0x'.
+ * Returns 0 if string is invalid  */
+unsigned string_hex_to_unsigned(const char *str);
+
+char *string_init(const char *src);
+
+void string_set(char **string, const char *src);
+
+extern const unsigned char lr_char_props[256];
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/time/rtime.h b/ThirdParty/RetroArch/libretro-common/include/time/rtime.h
new file mode 100644
index 000000000..7629c1eab
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/time/rtime.h
@@ -0,0 +1,48 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (rtime.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __LIBRETRO_SDK_RTIME_H__
+#define __LIBRETRO_SDK_RTIME_H__
+
+#include <retro_common_api.h>
+
+#include <stdint.h>
+#include <stddef.h>
+#include <time.h>
+
+RETRO_BEGIN_DECLS
+
+/* TODO/FIXME: Move all generic time handling functions
+ * to this file */
+
+/* Must be called before using rtime_localtime() */
+void rtime_init(void);
+
+/* Must be called upon program termination */
+void rtime_deinit(void);
+
+/* Thread-safe wrapper for localtime() */
+struct tm *rtime_localtime(const time_t *timep, struct tm *result);
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/vfs/vfs.h b/ThirdParty/RetroArch/libretro-common/include/vfs/vfs.h
new file mode 100644
index 000000000..bd61c69aa
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/vfs/vfs.h
@@ -0,0 +1,111 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+*
+* ---------------------------------------------------------------------------------------
+* The following license statement only applies to this file (vfs_implementation.h).
+* ---------------------------------------------------------------------------------------
+*
+* Permission is hereby granted, free of charge,
+* to any person obtaining a copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation the rights to
+* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef __LIBRETRO_SDK_VFS_H
+#define __LIBRETRO_SDK_VFS_H
+
+#include <retro_common_api.h>
+#include <boolean.h>
+
+#ifdef RARCH_INTERNAL
+#ifndef VFS_FRONTEND
+#define VFS_FRONTEND
+#endif
+#endif
+
+RETRO_BEGIN_DECLS
+
+#ifdef _WIN32
+typedef void* HANDLE;
+#endif
+
+#ifdef HAVE_CDROM
+typedef struct
+{
+   int64_t byte_pos;
+   char *cue_buf;
+   size_t cue_len;
+   unsigned cur_lba;
+   unsigned last_frame_lba;
+   unsigned char cur_min;
+   unsigned char cur_sec;
+   unsigned char cur_frame;
+   unsigned char cur_track;
+   unsigned char last_frame[2352];
+   char drive;
+   bool last_frame_valid;
+} vfs_cdrom_t;
+#endif
+
+enum vfs_scheme
+{
+   VFS_SCHEME_NONE = 0,
+   VFS_SCHEME_CDROM
+};
+
+#if !(defined(__WINRT__) && defined(__cplusplus_winrt))
+#ifdef VFS_FRONTEND
+struct retro_vfs_file_handle
+#else
+struct libretro_vfs_implementation_file
+#endif
+{
+#ifdef HAVE_CDROM
+   vfs_cdrom_t cdrom; /* int64_t alignment */
+#endif
+   int64_t size;
+   uint64_t mappos;
+   uint64_t mapsize;
+   FILE *fp;
+#ifdef _WIN32
+   HANDLE fh;
+#endif
+   char *buf;
+   char* orig_path;
+   uint8_t *mapped;
+   int fd;
+   unsigned hints;
+   enum vfs_scheme scheme;
+};
+#endif
+
+/* Replace the following symbol with something appropriate
+ * to signify the file is being compiled for a front end instead of a core.
+ * This allows the same code to act as reference implementation
+ * for VFS and as fallbacks for when the front end does not provide VFS functionality.
+ */
+
+#ifdef VFS_FRONTEND
+typedef struct retro_vfs_file_handle libretro_vfs_implementation_file;
+#else
+typedef struct libretro_vfs_implementation_file libretro_vfs_implementation_file;
+#endif
+
+#ifdef VFS_FRONTEND
+typedef struct retro_vfs_dir_handle libretro_vfs_implementation_dir;
+#else
+typedef struct libretro_vfs_implementation_dir libretro_vfs_implementation_dir;
+#endif
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/include/vfs/vfs_implementation.h b/ThirdParty/RetroArch/libretro-common/include/vfs/vfs_implementation.h
new file mode 100644
index 000000000..b88d2f3d2
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/include/vfs/vfs_implementation.h
@@ -0,0 +1,82 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+*
+* ---------------------------------------------------------------------------------------
+* The following license statement only applies to this file (vfs_implementation.h).
+* ---------------------------------------------------------------------------------------
+*
+* Permission is hereby granted, free of charge,
+* to any person obtaining a copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation the rights to
+* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef __LIBRETRO_SDK_VFS_IMPLEMENTATION_H
+#define __LIBRETRO_SDK_VFS_IMPLEMENTATION_H
+
+#include <stdio.h>
+#include <stdint.h>
+#include <libretro.h>
+#include <retro_environment.h>
+#include <vfs/vfs.h>
+
+RETRO_BEGIN_DECLS
+
+libretro_vfs_implementation_file *retro_vfs_file_open_impl(const char *path, unsigned mode, unsigned hints);
+
+int retro_vfs_file_close_impl(libretro_vfs_implementation_file *stream);
+
+int retro_vfs_file_error_impl(libretro_vfs_implementation_file *stream);
+
+int64_t retro_vfs_file_size_impl(libretro_vfs_implementation_file *stream);
+
+int64_t retro_vfs_file_truncate_impl(libretro_vfs_implementation_file *stream, int64_t length);
+
+int64_t retro_vfs_file_tell_impl(libretro_vfs_implementation_file *stream);
+
+int64_t retro_vfs_file_seek_impl(libretro_vfs_implementation_file *stream, int64_t offset, int seek_position);
+
+int64_t retro_vfs_file_read_impl(libretro_vfs_implementation_file *stream, void *s, uint64_t len);
+
+int64_t retro_vfs_file_write_impl(libretro_vfs_implementation_file *stream, const void *s, uint64_t len);
+
+int retro_vfs_file_flush_impl(libretro_vfs_implementation_file *stream);
+
+int retro_vfs_file_remove_impl(const char *path);
+
+int retro_vfs_file_rename_impl(const char *old_path, const char *new_path);
+
+const char *retro_vfs_file_get_path_impl(libretro_vfs_implementation_file *stream);
+
+int retro_vfs_stat_impl(const char *path, int32_t *size);
+
+int retro_vfs_mkdir_impl(const char *dir);
+
+libretro_vfs_implementation_dir *retro_vfs_opendir_impl(const char *dir, bool include_hidden);
+
+bool retro_vfs_readdir_impl(libretro_vfs_implementation_dir *dirstream);
+
+const char *retro_vfs_dirent_get_name_impl(libretro_vfs_implementation_dir *dirstream);
+
+bool retro_vfs_dirent_is_dir_impl(libretro_vfs_implementation_dir *dirstream);
+
+int retro_vfs_closedir_impl(libretro_vfs_implementation_dir *dirstream);
+
+#ifdef __WINRT__
+
+void uwp_set_acl(const wchar_t* path, const wchar_t* AccessString);
+
+#endif
+
+RETRO_END_DECLS
+
+#endif
diff --git a/ThirdParty/RetroArch/libretro-common/lists/string_list.c b/ThirdParty/RetroArch/libretro-common/lists/string_list.c
new file mode 100644
index 000000000..0df12d7a1
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/lists/string_list.c
@@ -0,0 +1,554 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (string_list.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <lists/string_list.h>
+#include <compat/strl.h>
+#include <compat/posix_string.h>
+#include <string/stdstring.h>
+
+static bool string_list_deinitialize_internal(struct string_list *list)
+{
+   if (!list)
+      return false;
+
+   if (list->elems)
+   {
+      unsigned i;
+      for (i = 0; i < list->size; i++)
+      {
+         if (list->elems[i].data)
+            free(list->elems[i].data);
+         if (list->elems[i].userdata)
+            free(list->elems[i].userdata);
+         list->elems[i].data     = NULL;
+         list->elems[i].userdata = NULL;
+      }
+
+      free(list->elems);
+   }
+
+   list->elems = NULL;
+
+   return true;
+}
+
+/**
+ * string_list_capacity:
+ * @list             : pointer to string list
+ * @cap              : new capacity for string list.
+ *
+ * Change maximum capacity of string list's size.
+ *
+ * Returns: true (1) if successful, otherwise false (0).
+ **/
+static bool string_list_capacity(struct string_list *list, size_t cap)
+{
+   struct string_list_elem *new_data = (struct string_list_elem*)
+      realloc(list->elems, cap * sizeof(*new_data));
+
+   if (!new_data)
+      return false;
+
+   if (cap > list->cap)
+      memset(&new_data[list->cap], 0, sizeof(*new_data) * (cap - list->cap));
+
+   list->elems = new_data;
+   list->cap   = cap;
+   return true;
+}
+
+/**
+ * string_list_free
+ * @list             : pointer to string list object
+ *
+ * Frees a string list.
+ */
+void string_list_free(struct string_list *list)
+{
+   if (!list)
+      return;
+
+   string_list_deinitialize_internal(list);
+
+   free(list);
+}
+
+bool string_list_deinitialize(struct string_list *list)
+{
+   if (!list)
+      return false;
+   if (!string_list_deinitialize_internal(list))
+      return false;
+   list->elems              = NULL;
+   list->size               = 0;
+   list->cap                = 0;
+   return true;
+}
+
+/**
+ * string_list_new:
+ *
+ * Creates a new string list. Has to be freed manually.
+ *
+ * Returns: new string list if successful, otherwise NULL.
+ */
+struct string_list *string_list_new(void)
+{
+   struct string_list_elem *
+      elems                 = NULL;
+   struct string_list *list = (struct string_list*)
+      malloc(sizeof(*list));
+   if (!list)
+      return NULL;
+
+   if (!(elems = (struct string_list_elem*)
+      calloc(32, sizeof(*elems))))
+   {
+      string_list_free(list);
+      return NULL;
+   }
+
+   list->elems              = elems;
+   list->size               = 0;
+   list->cap                = 32;
+
+   return list;
+}
+
+bool string_list_initialize(struct string_list *list)
+{
+   struct string_list_elem *
+      elems                 = NULL;
+   if (!list)
+      return false;
+   if (!(elems = (struct string_list_elem*)
+      calloc(32, sizeof(*elems))))
+   {
+      string_list_deinitialize(list);
+      return false;
+   }
+   list->elems              = elems;
+   list->size               = 0;
+   list->cap                = 32;
+   return true;
+}
+
+/**
+ * string_list_append:
+ * @list             : pointer to string list
+ * @elem             : element to add to the string list
+ * @attr             : attributes of new element.
+ *
+ * Appends a new element to the string list.
+ *
+ * Returns: true (1) if successful, otherwise false (0).
+ **/
+bool string_list_append(struct string_list *list, const char *elem,
+      union string_list_elem_attr attr)
+{
+   char *data_dup = NULL;
+
+   /* Note: If 'list' is incorrectly initialised
+    * (i.e. if struct is zero initialised and
+    * string_list_initialize() is not called on
+    * it) capacity will be zero. This will cause
+    * a segfault. Handle this case by forcing the new
+    * capacity to a fixed size of 32 */
+   if (list->size >= list->cap &&
+         !string_list_capacity(list,
+               (list->cap > 0) ? (list->cap * 2) : 32))
+      return false;
+
+   data_dup = strdup(elem);
+   if (!data_dup)
+      return false;
+
+   list->elems[list->size].data = data_dup;
+   list->elems[list->size].attr = attr;
+
+   list->size++;
+   return true;
+}
+
+/**
+ * string_list_append_n:
+ * @list             : pointer to string list
+ * @elem             : element to add to the string list
+ * @length           : read at most this many bytes from elem
+ * @attr             : attributes of new element.
+ *
+ * Appends a new element to the string list.
+ *
+ * Returns: true (1) if successful, otherwise false (0).
+ **/
+bool string_list_append_n(struct string_list *list, const char *elem,
+      unsigned length, union string_list_elem_attr attr)
+{
+   char *data_dup = NULL;
+
+   if (list->size >= list->cap &&
+         !string_list_capacity(list, list->cap * 2))
+      return false;
+
+   data_dup = (char*)malloc(length + 1);
+
+   if (!data_dup)
+      return false;
+
+   strlcpy(data_dup, elem, length + 1);
+
+   list->elems[list->size].data = data_dup;
+   list->elems[list->size].attr = attr;
+
+   list->size++;
+   return true;
+}
+
+/**
+ * string_list_set:
+ * @list             : pointer to string list
+ * @idx              : index of element in string list
+ * @str              : value for the element.
+ *
+ * Set value of element inside string list.
+ **/
+void string_list_set(struct string_list *list,
+      unsigned idx, const char *str)
+{
+   free(list->elems[idx].data);
+   list->elems[idx].data = strdup(str);
+}
+
+/**
+ * string_list_join_concat:
+ * @buffer           : buffer that @list will be joined to.
+ * @size             : length of @buffer.
+ * @list             : pointer to string list.
+ * @delim            : delimiter character for @list.
+ *
+ * A string list will be joined/concatenated as a
+ * string to @buffer, delimited by @delim.
+ */
+void string_list_join_concat(char *buffer, size_t size,
+      const struct string_list *list, const char *delim)
+{
+   size_t i;
+   size_t len = strlen_size(buffer, size);
+
+   /* If buffer is already 'full', nothing
+    * further can be added
+    * > This condition will also be triggered
+    *   if buffer is not NUL-terminated,
+    *   in which case any attempt to increment
+    *   buffer or decrement size would lead to
+    *   undefined behaviour */
+   if (len >= size)
+      return;
+
+   buffer += len;
+   size   -= len;
+
+   for (i = 0; i < list->size; i++)
+   {
+      strlcat(buffer, list->elems[i].data, size);
+      if ((i + 1) < list->size)
+         strlcat(buffer, delim, size);
+   }
+}
+
+/**
+ * string_split:
+ * @str              : string to turn into a string list
+ * @delim            : delimiter character to use for splitting the string.
+ *
+ * Creates a new string list based on string @str, delimited by @delim.
+ *
+ * Returns: new string list if successful, otherwise NULL.
+ */
+struct string_list *string_split(const char *str, const char *delim)
+{
+   char *save      = NULL;
+   char *copy      = NULL;
+   const char *tmp = NULL;
+   struct string_list *list = string_list_new();
+
+   if (!list)
+      return NULL;
+
+   copy = strdup(str);
+   if (!copy)
+      goto error;
+
+   tmp = strtok_r(copy, delim, &save);
+   while (tmp)
+   {
+      union string_list_elem_attr attr;
+
+      attr.i = 0;
+
+      if (!string_list_append(list, tmp, attr))
+         goto error;
+
+      tmp = strtok_r(NULL, delim, &save);
+   }
+
+   free(copy);
+   return list;
+
+error:
+   string_list_free(list);
+   free(copy);
+   return NULL;
+}
+
+bool string_split_noalloc(struct string_list *list,
+      const char *str, const char *delim)
+{
+   char *save      = NULL;
+   char *copy      = NULL;
+   const char *tmp = NULL;
+
+   if (!list)
+      return false;
+
+   copy            = strdup(str);
+   if (!copy)
+      return false;
+
+   tmp             = strtok_r(copy, delim, &save);
+   while (tmp)
+   {
+      union string_list_elem_attr attr;
+
+      attr.i = 0;
+
+      if (!string_list_append(list, tmp, attr))
+      {
+         free(copy);
+         return false;
+      }
+
+      tmp = strtok_r(NULL, delim, &save);
+   }
+
+   free(copy);
+   return true;
+}
+
+/**
+ * string_separate:
+ * @str              : string to turn into a string list
+ * @delim            : delimiter character to use for separating the string.
+ *
+ * Creates a new string list based on string @str, delimited by @delim.
+ * Includes empty strings - i.e. two adjacent delimiters will resolve
+ * to a string list element of "".
+ *
+ * Returns: new string list if successful, otherwise NULL.
+ */
+struct string_list *string_separate(char *str, const char *delim)
+{
+   char *token              = NULL;
+   char **str_ptr           = NULL;
+   struct string_list *list = NULL;
+
+   /* Sanity check */
+   if (!str || string_is_empty(delim))
+      goto error;
+
+   str_ptr = &str;
+   list    = string_list_new();
+
+   if (!list)
+      goto error;
+
+   token = string_tokenize(str_ptr, delim);
+   while (token)
+   {
+      union string_list_elem_attr attr;
+
+      attr.i = 0;
+
+      if (!string_list_append(list, token, attr))
+         goto error;
+
+      free(token);
+      token = NULL;
+
+      token = string_tokenize(str_ptr, delim);
+   }
+
+   return list;
+
+error:
+   if (token)
+      free(token);
+   if (list)
+      string_list_free(list);
+   return NULL;
+}
+
+bool string_separate_noalloc(
+      struct string_list *list,
+      char *str, const char *delim)
+{
+   char *token              = NULL;
+   char **str_ptr           = NULL;
+
+   /* Sanity check */
+   if (!str || string_is_empty(delim) || !list)
+      return false;
+
+   str_ptr = &str;
+   token   = string_tokenize(str_ptr, delim);
+
+   while (token)
+   {
+      union string_list_elem_attr attr;
+
+      attr.i = 0;
+
+      if (!string_list_append(list, token, attr))
+      {
+         free(token);
+         return false;
+      }
+
+      free(token);
+      token = string_tokenize(str_ptr, delim);
+   }
+
+   return true;
+}
+
+/**
+ * string_list_find_elem:
+ * @list             : pointer to string list
+ * @elem             : element to find inside the string list.
+ *
+ * Searches for an element (@elem) inside the string list.
+ *
+ * Returns: true (1) if element could be found, otherwise false (0).
+ */
+int string_list_find_elem(const struct string_list *list, const char *elem)
+{
+   size_t i;
+
+   if (!list)
+      return false;
+
+   for (i = 0; i < list->size; i++)
+   {
+      if (string_is_equal_noncase(list->elems[i].data, elem))
+         return (int)(i + 1);
+   }
+
+   return false;
+}
+
+/**
+ * string_list_find_elem_prefix:
+ * @list             : pointer to string list
+ * @prefix           : prefix to append to @elem
+ * @elem             : element to find inside the string list.
+ *
+ * Searches for an element (@elem) inside the string list. Will
+ * also search for the same element prefixed by @prefix.
+ *
+ * Returns: true (1) if element could be found, otherwise false (0).
+ */
+bool string_list_find_elem_prefix(const struct string_list *list,
+      const char *prefix, const char *elem)
+{
+   size_t i;
+   char prefixed[255];
+
+   if (!list)
+      return false;
+
+   prefixed[0] = '\0';
+
+   strlcpy(prefixed, prefix, sizeof(prefixed));
+   strlcat(prefixed, elem,   sizeof(prefixed));
+
+   for (i = 0; i < list->size; i++)
+   {
+      if (string_is_equal_noncase(list->elems[i].data, elem) ||
+            string_is_equal_noncase(list->elems[i].data, prefixed))
+         return true;
+   }
+
+   return false;
+}
+
+struct string_list *string_list_clone(
+      const struct string_list *src)
+{
+   unsigned i;
+   struct string_list_elem 
+      *elems              = NULL;
+   struct string_list 
+      *dest               = (struct string_list*)
+      malloc(sizeof(struct string_list));
+
+   if (!dest)
+      return NULL;
+
+   dest->elems            = NULL;
+   dest->size             = src->size;
+   dest->cap              = src->cap;
+   if (dest->cap < dest->size)
+      dest->cap           = dest->size;
+
+   elems                  = (struct string_list_elem*)
+      calloc(dest->cap, sizeof(struct string_list_elem));
+
+   if (!elems)
+   {
+      free(dest);
+      return NULL;
+   }
+
+   dest->elems            = elems;
+
+   for (i = 0; i < src->size; i++)
+   {
+      const char *_src    = src->elems[i].data;
+      size_t      len     = _src ? strlen(_src) : 0;
+
+      dest->elems[i].data = NULL;
+      dest->elems[i].attr = src->elems[i].attr;
+
+      if (len != 0)
+      {
+         char *result        = (char*)malloc(len + 1);
+         strcpy(result, _src);
+         dest->elems[i].data = result;
+      }
+   }
+
+   return dest;
+}
diff --git a/ThirdParty/RetroArch/libretro-common/memmap/memalign.c b/ThirdParty/RetroArch/libretro-common/memmap/memalign.c
new file mode 100644
index 000000000..14eaeffdb
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/memmap/memalign.c
@@ -0,0 +1,63 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (memalign.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <memalign.h>
+
+void *memalign_alloc(size_t boundary, size_t size)
+{
+   void **place   = NULL;
+   uintptr_t addr = 0;
+   void *ptr      = (void*)malloc(boundary + size + sizeof(uintptr_t));
+   if (!ptr)
+      return NULL;
+
+   addr           = ((uintptr_t)ptr + sizeof(uintptr_t) + boundary)
+      & ~(boundary - 1);
+   place          = (void**)addr;
+   place[-1]      = ptr;
+
+   return (void*)addr;
+}
+
+void memalign_free(void *ptr)
+{
+   void **p = NULL;
+   if (!ptr)
+      return;
+
+   p = (void**)ptr;
+   free(p[-1]);
+}
+
+void *memalign_alloc_aligned(size_t size)
+{
+#if defined(__x86_64__) || defined(__LP64) || defined(__IA64__) || defined(_M_X64) || defined(_M_X64) || defined(_WIN64)
+   return memalign_alloc(64, size);
+#elif defined(__i386__) || defined(__i486__) || defined(__i686__) || defined(GEKKO) || defined(_M_IX86)
+   return memalign_alloc(32, size);
+#else
+   return memalign_alloc(32, size);
+#endif
+}
diff --git a/ThirdParty/RetroArch/libretro-common/streams/file_stream.c b/ThirdParty/RetroArch/libretro-common/streams/file_stream.c
new file mode 100644
index 000000000..2ac5dbb83
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/streams/file_stream.c
@@ -0,0 +1,682 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (file_stream.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <errno.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef _MSC_VER
+#include <compat/msvc.h>
+#endif
+
+#include <string/stdstring.h>
+#include <streams/file_stream.h>
+#define VFS_FRONTEND
+#include <vfs/vfs_implementation.h>
+
+#define VFS_ERROR_RETURN_VALUE -1
+
+struct RFILE
+{
+   struct retro_vfs_file_handle *hfile;
+	bool error_flag;
+	bool eof_flag;
+};
+
+static retro_vfs_get_path_t filestream_get_path_cb = NULL;
+static retro_vfs_open_t filestream_open_cb         = NULL;
+static retro_vfs_close_t filestream_close_cb       = NULL;
+static retro_vfs_size_t filestream_size_cb         = NULL;
+static retro_vfs_truncate_t filestream_truncate_cb = NULL;
+static retro_vfs_tell_t filestream_tell_cb         = NULL;
+static retro_vfs_seek_t filestream_seek_cb         = NULL;
+static retro_vfs_read_t filestream_read_cb         = NULL;
+static retro_vfs_write_t filestream_write_cb       = NULL;
+static retro_vfs_flush_t filestream_flush_cb       = NULL;
+static retro_vfs_remove_t filestream_remove_cb     = NULL;
+static retro_vfs_rename_t filestream_rename_cb     = NULL;
+
+/* VFS Initialization */
+
+void filestream_vfs_init(const struct retro_vfs_interface_info* vfs_info)
+{
+   const struct retro_vfs_interface *
+      vfs_iface           = vfs_info->iface;
+
+   filestream_get_path_cb = NULL;
+   filestream_open_cb     = NULL;
+   filestream_close_cb    = NULL;
+   filestream_tell_cb     = NULL;
+   filestream_size_cb     = NULL;
+   filestream_truncate_cb = NULL;
+   filestream_seek_cb     = NULL;
+   filestream_read_cb     = NULL;
+   filestream_write_cb    = NULL;
+   filestream_flush_cb    = NULL;
+   filestream_remove_cb   = NULL;
+   filestream_rename_cb   = NULL;
+
+   if (
+             (vfs_info->required_interface_version < 
+             FILESTREAM_REQUIRED_VFS_VERSION)
+         || !vfs_iface)
+      return;
+
+   filestream_get_path_cb = vfs_iface->get_path;
+   filestream_open_cb     = vfs_iface->open;
+   filestream_close_cb    = vfs_iface->close;
+   filestream_size_cb     = vfs_iface->size;
+   filestream_truncate_cb = vfs_iface->truncate;
+   filestream_tell_cb     = vfs_iface->tell;
+   filestream_seek_cb     = vfs_iface->seek;
+   filestream_read_cb     = vfs_iface->read;
+   filestream_write_cb    = vfs_iface->write;
+   filestream_flush_cb    = vfs_iface->flush;
+   filestream_remove_cb   = vfs_iface->remove;
+   filestream_rename_cb   = vfs_iface->rename;
+}
+
+/* Callback wrappers */
+bool filestream_exists(const char *path)
+{
+   RFILE *dummy           = NULL;
+
+   if (!path || !*path)
+      return false;
+
+   dummy                  = filestream_open(
+         path,
+         RETRO_VFS_FILE_ACCESS_READ,
+         RETRO_VFS_FILE_ACCESS_HINT_NONE);
+
+   if (!dummy)
+      return false;
+
+   if (filestream_close(dummy) != 0)
+      if (dummy)
+         free(dummy);
+
+   dummy = NULL;
+   return true;
+}
+
+int64_t filestream_get_size(RFILE *stream)
+{
+   int64_t output;
+
+   if (filestream_size_cb)
+      output = filestream_size_cb(stream->hfile);
+   else
+      output = retro_vfs_file_size_impl(
+            (libretro_vfs_implementation_file*)stream->hfile);
+
+   if (output == VFS_ERROR_RETURN_VALUE)
+      stream->error_flag = true;
+
+   return output;
+}
+
+int64_t filestream_truncate(RFILE *stream, int64_t length)
+{
+   int64_t output;
+
+   if (filestream_truncate_cb)
+      output = filestream_truncate_cb(stream->hfile, length);
+   else
+      output = retro_vfs_file_truncate_impl(
+            (libretro_vfs_implementation_file*)stream->hfile, length);
+
+   if (output == VFS_ERROR_RETURN_VALUE)
+      stream->error_flag = true;
+
+   return output;
+}
+
+/**
+ * filestream_open:
+ * @path               : path to file
+ * @mode               : file mode to use when opening (read/write)
+ * @hints              :
+ *
+ * Opens a file for reading or writing, depending on the requested mode.
+ * Returns a pointer to an RFILE if opened successfully, otherwise NULL.
+ **/
+RFILE* filestream_open(const char *path, unsigned mode, unsigned hints)
+{
+   struct retro_vfs_file_handle  *fp = NULL;
+   RFILE* output                     = NULL;
+
+   if (filestream_open_cb)
+      fp = (struct retro_vfs_file_handle*)
+         filestream_open_cb(path, mode, hints);
+   else
+      fp = (struct retro_vfs_file_handle*)
+         retro_vfs_file_open_impl(path, mode, hints);
+
+   if (!fp)
+      return NULL;
+
+   output             = (RFILE*)malloc(sizeof(RFILE));
+   output->error_flag = false;
+   output->eof_flag   = false;
+   output->hfile      = fp;
+   return output;
+}
+
+char* filestream_gets(RFILE *stream, char *s, size_t len)
+{
+   int c   = 0;
+   char *p = s;
+   if (!stream)
+      return NULL;
+
+   /* get max bytes or up to a newline */
+
+   for (len--; len > 0; len--)
+   {
+      if ((c = filestream_getc(stream)) == EOF)
+         break;
+      *p++ = c;
+      if (c == '\n')
+         break;
+   }
+   *p = 0;
+
+   if (p == s && c == EOF)
+      return NULL;
+   return (s);
+}
+
+int filestream_getc(RFILE *stream)
+{
+   char c = 0;
+   if (stream && filestream_read(stream, &c, 1) == 1)
+      return (int)(unsigned char)c;
+   return EOF;
+}
+
+int filestream_vscanf(RFILE *stream, const char* format, va_list *args)
+{
+   char buf[4096];
+   char subfmt[64];
+   va_list args_copy;
+   const char * bufiter = buf;
+   int        ret       = 0;
+   int64_t startpos     = filestream_tell(stream);
+   int64_t maxlen       = filestream_read(stream, buf, sizeof(buf)-1);
+
+   if (maxlen <= 0)
+      return EOF;
+
+   buf[maxlen] = '\0';
+
+   /* Have to copy the input va_list here
+    * > Calling va_arg() on 'args' directly would
+    *   cause the va_list to have an indeterminate value
+    *   in the function calling filestream_vscanf(),
+    *   leading to unexpected behaviour */
+#ifdef __va_copy
+   __va_copy(args_copy, *args);
+#else
+   va_copy(args_copy, *args);
+#endif
+
+   while (*format)
+   {
+      if (*format == '%')
+      {
+         int sublen;
+         char* subfmtiter = subfmt;
+         bool asterisk    = false;
+
+         *subfmtiter++    = *format++; /* '%' */
+
+         /* %[*][width][length]specifier */
+
+         if (*format == '*')
+         {
+            asterisk      = true;
+            *subfmtiter++ = *format++;
+         }
+
+         while (ISDIGIT((unsigned char)*format))
+            *subfmtiter++ = *format++; /* width */
+
+         /* length */
+         if (*format == 'h' || *format == 'l')
+         {
+            if (format[1] == format[0])
+               *subfmtiter++ = *format++;
+            *subfmtiter++    = *format++;
+         }
+         else if (
+               *format == 'j' || 
+               *format == 'z' || 
+               *format == 't' || 
+               *format == 'L')
+         {
+            *subfmtiter++ = *format++;
+         }
+
+         /* specifier - always a single character (except ]) */
+         if (*format == '[')
+         {
+            while (*format != ']')
+               *subfmtiter++ = *format++;
+            *subfmtiter++    = *format++;
+         }
+         else
+            *subfmtiter++    = *format++;
+
+         *subfmtiter++       = '%';
+         *subfmtiter++       = 'n';
+         *subfmtiter++       = '\0';
+
+         if (sizeof(void*) != sizeof(long*))
+            abort(); /* all pointers must have the same size */
+
+         if (asterisk)
+         {
+            int v = sscanf(bufiter, subfmt, &sublen);
+            if (v == EOF)
+               return EOF;
+            if (v != 0)
+               break;
+         }
+         else
+         {
+            int v = sscanf(bufiter, subfmt, va_arg(args_copy, void*), &sublen);
+            if (v == EOF)
+               return EOF;
+            if (v != 1)
+               break;
+         }
+
+         ret++;
+         bufiter += sublen;
+      }
+      else if (isspace((unsigned char)*format))
+      {
+         while (isspace((unsigned char)*bufiter))
+            bufiter++;
+         format++;
+      }
+      else
+      {
+         if (*bufiter != *format)
+            break;
+         bufiter++;
+         format++;
+      }
+   }
+
+   va_end(args_copy);
+   filestream_seek(stream, startpos+(bufiter-buf),
+         RETRO_VFS_SEEK_POSITION_START);
+
+   return ret;
+}
+
+int filestream_scanf(RFILE *stream, const char* format, ...)
+{
+   int result;
+   va_list vl;
+   va_start(vl, format);
+   result = filestream_vscanf(stream, format, &vl);
+   va_end(vl);
+   return result;
+}
+
+int64_t filestream_seek(RFILE *stream, int64_t offset, int seek_position)
+{
+   int64_t output;
+
+   if (filestream_seek_cb)
+      output = filestream_seek_cb(stream->hfile, offset, seek_position);
+   else
+      output = retro_vfs_file_seek_impl(
+            (libretro_vfs_implementation_file*)stream->hfile,
+            offset, seek_position);
+
+   if (output == VFS_ERROR_RETURN_VALUE)
+      stream->error_flag = true;
+
+   stream->eof_flag      = false;
+
+   return output;
+}
+
+int filestream_eof(RFILE *stream)
+{
+   return stream->eof_flag;
+}
+
+int64_t filestream_tell(RFILE *stream)
+{
+   int64_t output;
+
+   if (filestream_size_cb)
+      output = filestream_tell_cb(stream->hfile);
+   else
+      output = retro_vfs_file_tell_impl(
+            (libretro_vfs_implementation_file*)stream->hfile);
+
+   if (output == VFS_ERROR_RETURN_VALUE)
+      stream->error_flag = true;
+
+   return output;
+}
+
+void filestream_rewind(RFILE *stream)
+{
+   if (!stream)
+      return;
+   filestream_seek(stream, 0L, RETRO_VFS_SEEK_POSITION_START);
+   stream->error_flag = false;
+   stream->eof_flag   = false;
+}
+
+int64_t filestream_read(RFILE *stream, void *s, int64_t len)
+{
+   int64_t output;
+
+   if (filestream_read_cb)
+      output = filestream_read_cb(stream->hfile, s, len);
+   else
+      output = retro_vfs_file_read_impl(
+            (libretro_vfs_implementation_file*)stream->hfile, s, len);
+
+   if (output == VFS_ERROR_RETURN_VALUE)
+      stream->error_flag = true;
+   if (output < len)
+      stream->eof_flag   = true;
+
+   return output;
+}
+
+int filestream_flush(RFILE *stream)
+{
+   int output;
+
+   if (filestream_flush_cb)
+      output = filestream_flush_cb(stream->hfile);
+   else
+      output = retro_vfs_file_flush_impl(
+            (libretro_vfs_implementation_file*)stream->hfile);
+
+   if (output == VFS_ERROR_RETURN_VALUE)
+      stream->error_flag = true;
+
+   return output;
+}
+
+int filestream_delete(const char *path)
+{
+   if (filestream_remove_cb)
+      return filestream_remove_cb(path);
+
+   return retro_vfs_file_remove_impl(path);
+}
+
+int filestream_rename(const char *old_path, const char *new_path)
+{
+   if (filestream_rename_cb)
+      return filestream_rename_cb(old_path, new_path);
+
+   return retro_vfs_file_rename_impl(old_path, new_path);
+}
+
+const char* filestream_get_path(RFILE *stream)
+{
+   if (filestream_get_path_cb)
+      return filestream_get_path_cb(stream->hfile);
+
+   return retro_vfs_file_get_path_impl(
+         (libretro_vfs_implementation_file*)stream->hfile);
+}
+
+int64_t filestream_write(RFILE *stream, const void *s, int64_t len)
+{
+   int64_t output;
+
+   if (filestream_write_cb)
+      output = filestream_write_cb(stream->hfile, s, len);
+   else
+      output = retro_vfs_file_write_impl(
+            (libretro_vfs_implementation_file*)stream->hfile, s, len);
+
+   if (output == VFS_ERROR_RETURN_VALUE)
+      stream->error_flag = true;
+
+   return output;
+}
+
+int filestream_putc(RFILE *stream, int c)
+{
+   char c_char = (char)c;
+   if (!stream)
+      return EOF;
+   return filestream_write(stream, &c_char, 1) == 1 
+      ? (int)(unsigned char)c 
+      : EOF;
+}
+
+int filestream_vprintf(RFILE *stream, const char* format, va_list args)
+{
+   static char buffer[8 * 1024];
+   int64_t num_chars = vsnprintf(buffer, sizeof(buffer),
+         format, args);
+
+   if (num_chars < 0)
+      return -1;
+   else if (num_chars == 0)
+      return 0;
+
+   return (int)filestream_write(stream, buffer, num_chars);
+}
+
+int filestream_printf(RFILE *stream, const char* format, ...)
+{
+   va_list vl;
+   int result;
+   va_start(vl, format);
+   result = filestream_vprintf(stream, format, vl);
+   va_end(vl);
+   return result;
+}
+
+int filestream_error(RFILE *stream)
+{
+   if (stream && stream->error_flag)
+      return 1;
+   return 0;
+}
+
+int filestream_close(RFILE *stream)
+{
+   int output;
+   struct retro_vfs_file_handle* fp = stream->hfile;
+
+   if (filestream_close_cb)
+      output = filestream_close_cb(fp);
+   else
+      output = retro_vfs_file_close_impl(
+            (libretro_vfs_implementation_file*)fp);
+
+   if (output == 0)
+      free(stream);
+
+   return output;
+}
+
+/**
+ * filestream_read_file:
+ * @path             : path to file.
+ * @buf              : buffer to allocate and read the contents of the
+ *                     file into. Needs to be freed manually.
+ * @len              : optional output integer containing bytes read.
+ *
+ * Read the contents of a file into @buf.
+ *
+ * Returns: non zero on success.
+ */
+int64_t filestream_read_file(const char *path, void **buf, int64_t *len)
+{
+   int64_t ret              = 0;
+   int64_t content_buf_size = 0;
+   void *content_buf        = NULL;
+   RFILE *file              = filestream_open(path,
+         RETRO_VFS_FILE_ACCESS_READ,
+         RETRO_VFS_FILE_ACCESS_HINT_NONE);
+
+   if (!file)
+   {
+      *buf = NULL;
+      return 0;
+   }
+
+   content_buf_size = filestream_get_size(file);
+
+   if (content_buf_size < 0)
+      goto error;
+
+   content_buf      = malloc((size_t)(content_buf_size + 1));
+
+   if (!content_buf)
+      goto error;
+   if ((int64_t)(uint64_t)(content_buf_size + 1) != (content_buf_size + 1))
+      goto error;
+
+   ret = filestream_read(file, content_buf, (int64_t)content_buf_size);
+   if (ret < 0)
+      goto error;
+
+   if (filestream_close(file) != 0)
+      if (file)
+         free(file);
+
+   *buf    = content_buf;
+
+   /* Allow for easy reading of strings to be safe.
+    * Will only work with sane character formatting (Unix). */
+   ((char*)content_buf)[ret] = '\0';
+
+   if (len)
+      *len = ret;
+
+   return 1;
+
+error:
+   if (file)
+      if (filestream_close(file) != 0)
+         free(file);
+   if (content_buf)
+      free(content_buf);
+   if (len)
+      *len = -1;
+   *buf = NULL;
+   return 0;
+}
+
+/**
+ * filestream_write_file:
+ * @path             : path to file.
+ * @data             : contents to write to the file.
+ * @size             : size of the contents.
+ *
+ * Writes data to a file.
+ *
+ * Returns: true (1) on success, false (0) otherwise.
+ */
+bool filestream_write_file(const char *path, const void *data, int64_t size)
+{
+   int64_t ret   = 0;
+   RFILE *file   = filestream_open(path,
+         RETRO_VFS_FILE_ACCESS_WRITE,
+         RETRO_VFS_FILE_ACCESS_HINT_NONE);
+   if (!file)
+      return false;
+
+   ret = filestream_write(file, data, size);
+   if (filestream_close(file) != 0)
+      if (file)
+         free(file);
+
+   if (ret != size)
+      return false;
+
+   return true;
+}
+
+/* Returned pointer must be freed by the caller. */
+char* filestream_getline(RFILE *stream)
+{
+   char *newline_tmp  = NULL;
+   size_t cur_size    = 8;
+   size_t idx         = 0;
+   int in             = 0;
+   char *newline      = (char*)malloc(9);
+
+   if (!stream || !newline)
+   {
+      if (newline)
+         free(newline);
+      return NULL;
+   }
+
+   in                 = filestream_getc(stream);
+
+   while (in != EOF && in != '\n')
+   {
+      if (idx == cur_size)
+      {
+         cur_size    *= 2;
+         newline_tmp  = (char*)realloc(newline, cur_size + 1);
+
+         if (!newline_tmp)
+         {
+            free(newline);
+            return NULL;
+         }
+
+         newline     = newline_tmp;
+      }
+
+      newline[idx++] = in;
+      in             = filestream_getc(stream);
+   }
+
+   newline[idx]      = '\0';
+   return newline;
+}
+
+libretro_vfs_implementation_file* filestream_get_vfs_handle(RFILE *stream)
+{
+   return (libretro_vfs_implementation_file*)stream->hfile;
+}
diff --git a/ThirdParty/RetroArch/libretro-common/string/stdstring.c b/ThirdParty/RetroArch/libretro-common/string/stdstring.c
new file mode 100644
index 000000000..d63798807
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/string/stdstring.c
@@ -0,0 +1,536 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (stdstring.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <ctype.h>
+#include <string.h>
+
+#include <string/stdstring.h>
+#include <encodings/utf.h>
+
+const uint8_t lr_char_props[256] = {
+	/*x0   x1   x2   x3   x4   x5   x6   x7   x8   x9   xA   xB   xC   xD   xE   xF */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x80,0x00,0x00, /* 0x                  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 1x                  */
+	0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 2x  !"#$%&'()*+,-./ */
+	0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x41,0x00,0x00,0x00,0x00,0x00,0x00, /* 3x 0123456789:;<=>? */
+	0x00,0x23,0x23,0x23,0x23,0x23,0x23,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22, /* 4x @ABCDEFGHIJKLMNO */
+	0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x00,0x00,0x00,0x00,0x08, /* 5x PQRSTUVWXYZ[\]^_ */
+	0x00,0x25,0x25,0x25,0x25,0x25,0x25,0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24, /* 6x `abcdefghijklmno */
+	0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x24,0x00,0x00,0x00,0x00,0x00, /* 7x pqrstuvwxyz{|}~  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 8x                  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 9x                  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* Ax                  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* Bx                  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* Cx                  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* Dx                  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* Ex                  */
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* Fx                  */
+};
+
+char *string_init(const char *src)
+{
+   return src ? strdup(src) : NULL;
+}
+
+void string_set(char **string, const char *src)
+{
+   free(*string);
+   *string = string_init(src);
+}
+
+
+char *string_to_upper(char *s)
+{
+   char *cs = (char *)s;
+   for ( ; *cs != '\0'; cs++)
+      *cs = toupper((unsigned char)*cs);
+   return s;
+}
+
+char *string_to_lower(char *s)
+{
+   char *cs = (char *)s;
+   for ( ; *cs != '\0'; cs++)
+      *cs = tolower((unsigned char)*cs);
+   return s;
+}
+
+char *string_ucwords(char *s)
+{
+   char *cs = (char *)s;
+   for ( ; *cs != '\0'; cs++)
+   {
+      if (*cs == ' ')
+         *(cs+1) = toupper((unsigned char)*(cs+1));
+   }
+
+   s[0] = toupper((unsigned char)s[0]);
+   return s;
+}
+
+char *string_replace_substring(const char *in,
+      const char *pattern, const char *replacement)
+{
+   size_t numhits, pattern_len, replacement_len, outlen;
+   const char *inat   = NULL;
+   const char *inprev = NULL;
+   char          *out = NULL;
+   char        *outat = NULL;
+
+   /* if either pattern or replacement is NULL,
+    * duplicate in and let caller handle it. */
+   if (!pattern || !replacement)
+      return strdup(in);
+
+   pattern_len     = strlen(pattern);
+   replacement_len = strlen(replacement);
+   numhits         = 0;
+   inat            = in;
+
+   while ((inat = strstr(inat, pattern)))
+   {
+      inat += pattern_len;
+      numhits++;
+   }
+
+   outlen          = strlen(in) - pattern_len*numhits + replacement_len*numhits;
+   out             = (char *)malloc(outlen+1);
+
+   if (!out)
+      return NULL;
+
+   outat           = out;
+   inat            = in;
+   inprev          = in;
+
+   while ((inat = strstr(inat, pattern)))
+   {
+      memcpy(outat, inprev, inat-inprev);
+      outat += inat-inprev;
+      memcpy(outat, replacement, replacement_len);
+      outat += replacement_len;
+      inat += pattern_len;
+      inprev = inat;
+   }
+   strcpy(outat, inprev);
+
+   return out;
+}
+
+/* Remove leading whitespaces */
+char *string_trim_whitespace_left(char *const s)
+{
+   if (s && *s)
+   {
+      size_t len     = strlen(s);
+      char *current  = s;
+
+      while (*current && ISSPACE((unsigned char)*current))
+      {
+         ++current;
+         --len;
+      }
+
+      if (s != current)
+         memmove(s, current, len + 1);
+   }
+
+   return s;
+}
+
+/* Remove trailing whitespaces */
+char *string_trim_whitespace_right(char *const s)
+{
+   if (s && *s)
+   {
+      size_t len     = strlen(s);
+      char  *current = s + len - 1;
+
+      while (current != s && ISSPACE((unsigned char)*current))
+      {
+         --current;
+         --len;
+      }
+
+      current[ISSPACE((unsigned char)*current) ? 0 : 1] = '\0';
+   }
+
+   return s;
+}
+
+/* Remove leading and trailing whitespaces */
+char *string_trim_whitespace(char *const s)
+{
+   string_trim_whitespace_right(s);  /* order matters */
+   string_trim_whitespace_left(s);
+
+   return s;
+}
+
+void word_wrap(char *dst, size_t dst_size, const char *src, int line_width, int wideglyph_width, unsigned max_lines)
+{
+   char *lastspace     = NULL;
+   unsigned counter    = 0;
+   unsigned lines      = 1;
+   size_t src_len      = strlen(src);
+   const char *src_end = src + src_len;
+
+   /* Prevent buffer overflow */
+   if (dst_size < src_len + 1)
+      return;
+
+   /* Early return if src string length is less
+    * than line width */
+   if (src_len < line_width)
+   {
+      strcpy(dst, src);
+      return;
+   }
+
+   while (*src != '\0')
+   {
+      unsigned char_len;
+
+      char_len = (unsigned)(utf8skip(src, 1) - src);
+      counter++;
+
+      if (*src == ' ')
+         lastspace = dst; /* Remember the location of the whitespace */
+      else if (*src == '\n')
+      {
+         /* If newlines embedded in the input,
+          * reset the index */
+         lines++;
+         counter = 0;
+
+         /* Early return if remaining src string
+          * length is less than line width */
+         if (src_end - src <= line_width)
+         {
+            strcpy(dst, src);
+            return;
+         }
+     }
+
+      while (char_len--)
+         *dst++ = *src++;
+
+      if (counter >= (unsigned)line_width)
+      {
+         counter = 0;
+
+         if (lastspace && (max_lines == 0 || lines < max_lines))
+         {
+            /* Replace nearest (previous) whitespace
+             * with newline character */
+            *lastspace = '\n';
+            lines++;
+
+            src -= dst - lastspace - 1;
+            dst = lastspace + 1;
+            lastspace  = NULL;
+
+            /* Early return if remaining src string
+             * length is less than line width */
+            if (src_end - src < line_width)
+            {
+               strcpy(dst, src);
+               return;
+            }
+         }
+      }
+   }
+
+   *dst = '\0';
+}
+
+void word_wrap_wideglyph(char *dst, size_t dst_size, const char *src, int line_width, int wideglyph_width, unsigned max_lines)
+{
+   char *lastspace                   = NULL;
+   char *lastwideglyph               = NULL;
+   const char *src_end               = src + strlen(src);
+   unsigned lines                    = 1;
+   /* 'line_width' means max numbers of characters per line,
+    * but this metric is only meaningful when dealing with
+    * 'regular' glyphs that have an on-screen pixel width
+    * similar to that of regular Latin characters.
+    * When handing so-called 'wide' Unicode glyphs, it is
+    * necessary to consider the actual on-screen pixel width
+    * of each character.
+    * In order to do this, we create a distinction between
+    * regular Latin 'non-wide' glyphs and 'wide' glyphs, and
+    * normalise all values relative to the on-screen pixel
+    * width of regular Latin characters:
+    * - Regular 'non-wide' glyphs have a normalised width of 100
+    * - 'line_width' is therefore normalised to 100 * (width_in_characters)
+    * - 'wide' glyphs have a normalised width of
+    *   100 * (wide_character_pixel_width / latin_character_pixel_width)
+    * - When a character is detected, the position in the current
+    *   line is incremented by the regular normalised width of 100
+    * - If that character is then determined to be a 'wide'
+    *   glyph, the position in the current line is further incremented
+    *   by the difference between the normalised 'wide' and 'non-wide'
+    *   width values */
+   unsigned counter_normalized       = 0;
+   int line_width_normalized         = line_width * 100;
+   int additional_counter_normalized = wideglyph_width - 100;
+ 
+   /* Early return if src string length is less
+    * than line width */
+   if (src_end - src < line_width)
+   {
+      strlcpy(dst, src, dst_size);
+      return;
+   }
+
+   while (*src != '\0')
+   {
+      unsigned char_len;
+
+      char_len = (unsigned)(utf8skip(src, 1) - src);
+      counter_normalized += 100;
+
+      /* Prevent buffer overflow */
+      if (char_len >= dst_size)
+         break;
+
+      if (*src == ' ')
+         lastspace = dst; /* Remember the location of the whitespace */
+      else if (*src == '\n')
+      {
+         /* If newlines embedded in the input,
+          * reset the index */
+         lines++;
+         counter_normalized = 0;
+
+         /* Early return if remaining src string
+          * length is less than line width */
+         if (src_end - src <= line_width)
+         {
+            strlcpy(dst, src, dst_size);
+            return;
+         }
+      }
+      else if (char_len >= 3)
+      {
+         /* Remember the location of the first byte
+          * whose length as UTF-8 >= 3*/
+         lastwideglyph = dst;
+         counter_normalized += additional_counter_normalized;
+      }
+
+      dst_size -= char_len;
+      while (char_len--)
+         *dst++ = *src++;
+
+      if (counter_normalized >= (unsigned)line_width_normalized)
+      {
+         counter_normalized = 0;
+
+         if (max_lines != 0 && lines >= max_lines)
+            continue;
+         else if (lastwideglyph && (!lastspace || lastwideglyph > lastspace))
+         {
+            /* Insert newline character */
+            *lastwideglyph = '\n';
+            lines++;
+            src -= dst - lastwideglyph;
+            dst = lastwideglyph + 1;
+            lastwideglyph = NULL;
+
+            /* Early return if remaining src string
+             * length is less than line width */
+            if (src_end - src <= line_width)
+            {
+               strlcpy(dst, src, dst_size);
+               return;
+            }
+         }
+         else if (lastspace)
+         {
+            /* Replace nearest (previous) whitespace
+             * with newline character */
+            *lastspace = '\n';
+            lines++;
+            src -= dst - lastspace - 1;
+            dst = lastspace + 1;
+            lastspace = NULL;
+
+            /* Early return if remaining src string
+             * length is less than line width */
+            if (src_end - src < line_width)
+            {
+               strlcpy(dst, src, dst_size);
+               return;
+            }
+         }
+      }
+   }
+
+   *dst = '\0';
+}
+
+/* Splits string into tokens seperated by 'delim'
+ * > Returned token string must be free()'d
+ * > Returns NULL if token is not found
+ * > After each call, 'str' is set to the position after the
+ *   last found token
+ * > Tokens *include* empty strings
+ * Usage example:
+ *    char *str      = "1,2,3,4,5,6,7,,,10,";
+ *    char **str_ptr = &str;
+ *    char *token    = NULL;
+ *    while ((token = string_tokenize(str_ptr, ",")))
+ *    {
+ *        printf("%s\n", token);
+ *        free(token);
+ *        token = NULL;
+ *    }
+ */
+char* string_tokenize(char **str, const char *delim)
+{
+   /* Taken from https://codereview.stackexchange.com/questions/216956/strtok-function-thread-safe-supports-empty-tokens-doesnt-change-string# */
+   char *str_ptr    = NULL;
+   char *delim_ptr  = NULL;
+   char *token      = NULL;
+   size_t token_len = 0;
+
+   /* Sanity checks */
+   if (!str || string_is_empty(delim))
+      return NULL;
+
+   str_ptr = *str;
+
+   /* Note: we don't check string_is_empty() here,
+    * empty strings are valid */
+   if (!str_ptr)
+      return NULL;
+
+   /* Search for delimiter */
+   delim_ptr = strstr(str_ptr, delim);
+
+   if (delim_ptr)
+      token_len = delim_ptr - str_ptr;
+   else
+      token_len = strlen(str_ptr);
+
+   /* Allocate token string */
+   token = (char *)malloc((token_len + 1) * sizeof(char));
+
+   if (!token)
+      return NULL;
+
+   /* Copy token */
+   strlcpy(token, str_ptr, (token_len + 1) * sizeof(char));
+   token[token_len] = '\0';
+
+   /* Update input string pointer */
+   *str = delim_ptr ? delim_ptr + strlen(delim) : NULL;
+
+   return token;
+}
+
+/* Removes every instance of character 'c' from 'str' */
+void string_remove_all_chars(char *str, char c)
+{
+   char *read_ptr  = NULL;
+   char *write_ptr = NULL;
+
+   if (string_is_empty(str))
+      return;
+
+   read_ptr  = str;
+   write_ptr = str;
+
+   while (*read_ptr != '\0')
+   {
+      *write_ptr = *read_ptr++;
+      write_ptr += (*write_ptr != c) ? 1 : 0;
+   }
+
+   *write_ptr = '\0';
+}
+
+/* Replaces every instance of character 'find' in 'str'
+ * with character 'replace' */
+void string_replace_all_chars(char *str, char find, char replace)
+{
+   char *str_ptr = str;
+
+   if (string_is_empty(str))
+      return;
+
+   while ((str_ptr = strchr(str_ptr, find)))
+      *str_ptr++ = replace;
+}
+
+/* Converts string to unsigned integer.
+ * Returns 0 if string is invalid  */
+unsigned string_to_unsigned(const char *str)
+{
+   const char *ptr = NULL;
+
+   if (string_is_empty(str))
+      return 0;
+
+   for (ptr = str; *ptr != '\0'; ptr++)
+   {
+      if (!ISDIGIT((unsigned char)*ptr))
+         return 0;
+   }
+
+   return (unsigned)strtoul(str, NULL, 10);
+}
+
+/* Converts hexadecimal string to unsigned integer.
+ * Handles optional leading '0x'.
+ * Returns 0 if string is invalid  */
+unsigned string_hex_to_unsigned(const char *str)
+{
+   const char *hex_str = str;
+   const char *ptr     = NULL;
+   size_t len;
+
+   if (string_is_empty(str))
+      return 0;
+
+   /* Remove leading '0x', if required */
+   len = strlen(str);
+
+   if (len >= 2)
+      if ((str[0] == '0') &&
+          ((str[1] == 'x') || (str[1] == 'X')))
+         hex_str = str + 2;
+
+   if (string_is_empty(hex_str))
+      return 0;
+
+   /* Check for valid characters */
+   for (ptr = hex_str; *ptr != '\0'; ptr++)
+   {
+      if (!isxdigit((unsigned char)*ptr))
+         return 0;
+   }
+
+   return (unsigned)strtoul(hex_str, NULL, 16);
+}
diff --git a/ThirdParty/RetroArch/libretro-common/time/rtime.c b/ThirdParty/RetroArch/libretro-common/time/rtime.c
new file mode 100644
index 000000000..d66c228fb
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/time/rtime.c
@@ -0,0 +1,81 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (rtime.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifdef HAVE_THREADS
+#include <rthreads/rthreads.h>
+#include <retro_assert.h>
+#include <stdlib.h>
+#endif
+
+#include <string.h>
+#include <time/rtime.h>
+
+#ifdef HAVE_THREADS
+/* TODO/FIXME - global */
+slock_t *rtime_localtime_lock = NULL;
+#endif
+
+/* Must be called before using rtime_localtime() */
+void rtime_init(void)
+{
+   rtime_deinit();
+#ifdef HAVE_THREADS
+   if (!rtime_localtime_lock)
+      rtime_localtime_lock = slock_new();
+
+   retro_assert(rtime_localtime_lock);
+#endif
+}
+
+/* Must be called upon program termination */
+void rtime_deinit(void)
+{
+#ifdef HAVE_THREADS
+   if (rtime_localtime_lock)
+   {
+      slock_free(rtime_localtime_lock);
+      rtime_localtime_lock = NULL;
+   }
+#endif
+}
+
+/* Thread-safe wrapper for localtime() */
+struct tm *rtime_localtime(const time_t *timep, struct tm *result)
+{
+   struct tm *time_info = NULL;
+
+   /* Lock mutex */
+#ifdef HAVE_THREADS
+   slock_lock(rtime_localtime_lock);
+#endif
+
+   time_info = localtime(timep);
+   if (time_info)
+      memcpy(result, time_info, sizeof(struct tm));
+
+   /* Unlock mutex */
+#ifdef HAVE_THREADS
+   slock_unlock(rtime_localtime_lock);
+#endif
+
+   return result;
+}
diff --git a/ThirdParty/RetroArch/libretro-common/vfs/vfs_implementation.c b/ThirdParty/RetroArch/libretro-common/vfs/vfs_implementation.c
new file mode 100644
index 000000000..7a24a95e8
--- /dev/null
+++ b/ThirdParty/RetroArch/libretro-common/vfs/vfs_implementation.c
@@ -0,0 +1,1335 @@
+/* Copyright  (C) 2010-2020 The RetroArch team
+*
+* ---------------------------------------------------------------------------------------
+* The following license statement only applies to this file (vfs_implementation.c).
+* ---------------------------------------------------------------------------------------
+*
+* Permission is hereby granted, free of charge,
+* to any person obtaining a copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation the rights to
+* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include <string/stdstring.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if defined(_WIN32)
+#  ifdef _MSC_VER
+#    define setmode _setmode
+#  endif
+#include <sys/stat.h>
+#  ifdef _XBOX
+#    include <xtl.h>
+#    define INVALID_FILE_ATTRIBUTES -1
+#  else
+
+#    include <fcntl.h>
+#    include <direct.h>
+#    include <windows.h>
+#  endif
+#    include <io.h>
+#else
+#  if defined(PSP)
+#    include <pspiofilemgr.h>
+#  endif
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  if !defined(VITA)
+#  include <dirent.h>
+#  endif
+#  include <unistd.h>
+#  if defined(ORBIS)
+#  include <sys/fcntl.h>
+#  include <sys/dirent.h>
+#  include <orbisFile.h>
+#  endif
+#  if defined(WIIU)
+#  include <malloc.h>
+#  endif
+#endif
+
+#include <fcntl.h>
+
+/* TODO: Some things are duplicated but I'm really afraid of breaking other platforms by touching this */
+#if defined(VITA)
+#  include <psp2/io/fcntl.h>
+#  include <psp2/io/dirent.h>
+#  include <psp2/io/stat.h>
+#elif defined(ORBIS)
+#  include <orbisFile.h>
+#  include <ps4link.h>
+#  include <sys/dirent.h>
+#  include <sys/fcntl.h>
+#elif !defined(_WIN32)
+#  if defined(PSP)
+#    include <pspiofilemgr.h>
+#  endif
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  include <dirent.h>
+#  include <unistd.h>
+#endif
+
+#if defined(__QNX__) || defined(PSP)
+#include <unistd.h> /* stat() is defined here */
+#endif
+
+#ifdef __APPLE__
+#include <CoreFoundation/CoreFoundation.h>
+#endif
+#ifdef __HAIKU__
+#include <kernel/image.h>
+#endif
+#ifndef __MACH__
+#include <compat/strl.h>
+#include <compat/posix_string.h>
+#endif
+#include <compat/strcasestr.h>
+#include <retro_miscellaneous.h>
+#include <encodings/utf.h>
+
+#if defined(_WIN32)
+#ifndef _XBOX
+#if defined(_MSC_VER) && _MSC_VER <= 1200
+#define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
+#endif
+#endif
+#elif defined(VITA)
+#define SCE_ERROR_ERRNO_EEXIST 0x80010011
+#include <psp2/io/fcntl.h>
+#include <psp2/io/dirent.h>
+#include <psp2/io/stat.h>
+#else
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#endif
+
+#if defined(ORBIS)
+#include <orbisFile.h>
+#include <sys/fcntl.h>
+#include <sys/dirent.h>
+#endif
+#if defined(PSP)
+#include <pspkernel.h>
+#endif
+
+#if defined(__PS3__) || defined(__PSL1GHT__)
+#include <defines/ps3_defines.h>
+#if defined(__PSL1GHT__)
+#include <lv2/sysfs.h>
+#endif
+#endif
+
+#if defined(VITA)
+#define FIO_S_ISDIR SCE_S_ISDIR
+#endif
+
+#if defined(__QNX__) || defined(PSP)
+#include <unistd.h> /* stat() is defined here */
+#endif
+
+/* Assume W-functions do not work below Win2K and Xbox platforms */
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500 || defined(_XBOX)
+
+#ifndef LEGACY_WIN32
+#define LEGACY_WIN32
+#endif
+
+#endif
+
+#if defined(_WIN32)
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+#define ATLEAST_VC2005
+#endif
+#endif
+
+#include <vfs/vfs_implementation.h>
+#include <libretro.h>
+#if defined(HAVE_MMAP)
+#include <memmap.h>
+#endif
+#include <encodings/utf.h>
+#include <compat/fopen_utf8.h>
+#include <file/file_path.h>
+
+#ifdef HAVE_CDROM
+#include <vfs/vfs_implementation_cdrom.h>
+#endif
+
+#if (defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) >= 200112) || (defined(__POSIX_VISIBLE) && __POSIX_VISIBLE >= 200112) || (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112) || __USE_LARGEFILE || (defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64)
+#ifndef HAVE_64BIT_OFFSETS
+#define HAVE_64BIT_OFFSETS
+#endif
+#endif
+
+#define RFILE_HINT_UNBUFFERED (1 << 8)
+
+int64_t retro_vfs_file_seek_internal(
+      libretro_vfs_implementation_file *stream,
+      int64_t offset, int whence)
+{
+   if (!stream)
+      return -1;
+
+   if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+   {
+#ifdef HAVE_CDROM
+      if (stream->scheme == VFS_SCHEME_CDROM)
+         return retro_vfs_file_seek_cdrom(stream, offset, whence);
+#endif
+#ifdef ATLEAST_VC2005
+      /* VC2005 and up have a special 64-bit fseek */
+      return _fseeki64(stream->fp, offset, whence);
+#elif defined(ORBIS)
+      {
+         int ret = orbisLseek(stream->fd, offset, whence);
+         if (ret < 0)
+            return -1;
+         return 0;
+      }
+#elif defined(HAVE_64BIT_OFFSETS)
+      return fseeko(stream->fp, (off_t)offset, whence);
+#else
+      return fseek(stream->fp, (long)offset, whence);
+#endif
+   }
+#ifdef HAVE_MMAP
+   /* Need to check stream->mapped because this function is
+    * called in filestream_open() */
+   if (stream->mapped && stream->hints &
+         RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+   {
+      /* fseek() returns error on under/overflow but
+       * allows cursor > EOF for
+       read-only file descriptors. */
+      switch (whence)
+      {
+         case SEEK_SET:
+            if (offset < 0)
+               return -1;
+
+            stream->mappos = offset;
+            break;
+
+         case SEEK_CUR:
+            if (  (offset < 0 && stream->mappos + offset > stream->mappos) ||
+                  (offset > 0 && stream->mappos + offset < stream->mappos))
+               return -1;
+
+            stream->mappos += offset;
+            break;
+
+         case SEEK_END:
+            if (stream->mapsize + offset < stream->mapsize)
+               return -1;
+
+            stream->mappos = stream->mapsize + offset;
+            break;
+      }
+      return stream->mappos;
+   }
+#endif
+
+   if (lseek(stream->fd, (off_t)offset, whence) < 0)
+      return -1;
+
+   return 0;
+}
+
+/**
+ * retro_vfs_file_open_impl:
+ * @path               : path to file
+ * @mode               : file mode to use when opening (read/write)
+ * @hints              :
+ *
+ * Opens a file for reading or writing, depending on the requested mode.
+ * Returns a pointer to an RFILE if opened successfully, otherwise NULL.
+ **/
+
+libretro_vfs_implementation_file *retro_vfs_file_open_impl(
+      const char *path, unsigned mode, unsigned hints)
+{
+#if defined(VFS_FRONTEND) || defined(HAVE_CDROM)
+   int                             path_len = (int)strlen(path);
+#endif
+#ifdef VFS_FRONTEND
+   const char                 *dumb_prefix  = "vfsonly://";
+   size_t                   dumb_prefix_siz = STRLEN_CONST("vfsonly://");
+   int                      dumb_prefix_len = (int)dumb_prefix_siz;
+#endif
+#ifdef HAVE_CDROM
+   const char *cdrom_prefix                 = "cdrom://";
+   size_t cdrom_prefix_siz                  = STRLEN_CONST("cdrom://");
+   int cdrom_prefix_len                     = (int)cdrom_prefix_siz;
+#endif
+   int                                flags = 0;
+   const char                     *mode_str = NULL;
+   libretro_vfs_implementation_file *stream = 
+      (libretro_vfs_implementation_file*)
+      malloc(sizeof(*stream));
+
+   if (!stream)
+      return NULL;
+
+   stream->fd                     = 0;
+   stream->hints                  = hints;
+   stream->size                   = 0;
+   stream->buf                    = NULL;
+   stream->fp                     = NULL;
+#ifdef _WIN32
+   stream->fh                     = 0;
+#endif
+   stream->orig_path              = NULL;
+   stream->mappos                 = 0;
+   stream->mapsize                = 0;
+   stream->mapped                 = NULL;
+   stream->scheme                 = VFS_SCHEME_NONE;
+
+#ifdef VFS_FRONTEND
+   if (path_len >= dumb_prefix_len)
+      if (!memcmp(path, dumb_prefix, dumb_prefix_len))
+         path             += dumb_prefix_siz;
+#endif
+
+#ifdef HAVE_CDROM
+   stream->cdrom.cue_buf          = NULL;
+   stream->cdrom.cue_len          = 0;
+   stream->cdrom.byte_pos         = 0;
+   stream->cdrom.drive            = 0;
+   stream->cdrom.cur_min          = 0;
+   stream->cdrom.cur_sec          = 0;
+   stream->cdrom.cur_frame        = 0;
+   stream->cdrom.cur_track        = 0;
+   stream->cdrom.cur_lba          = 0;
+   stream->cdrom.last_frame_lba   = 0;
+   stream->cdrom.last_frame[0]    = '\0';
+   stream->cdrom.last_frame_valid = false;
+
+   if (path_len > cdrom_prefix_len)
+   {
+      if (!memcmp(path, cdrom_prefix, cdrom_prefix_len))
+      {
+         path             += cdrom_prefix_siz;
+         stream->scheme    = VFS_SCHEME_CDROM;
+      }
+   }
+#endif
+
+   stream->orig_path       = strdup(path);
+
+#ifdef HAVE_MMAP
+   if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS && mode == RETRO_VFS_FILE_ACCESS_READ)
+      stream->hints |= RFILE_HINT_UNBUFFERED;
+   else
+#endif
+      stream->hints &= ~RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS;
+
+   switch (mode)
+   {
+      case RETRO_VFS_FILE_ACCESS_READ:
+         mode_str = "rb";
+
+         flags    = O_RDONLY;
+#ifdef _WIN32
+         flags   |= O_BINARY;
+#endif
+         break;
+
+      case RETRO_VFS_FILE_ACCESS_WRITE:
+         mode_str = "wb";
+
+         flags    = O_WRONLY | O_CREAT | O_TRUNC;
+#if !defined(ORBIS)
+#if !defined(_WIN32)
+         flags   |= S_IRUSR | S_IWUSR;
+#else
+         flags   |= O_BINARY;
+#endif
+#endif
+         break;
+
+      case RETRO_VFS_FILE_ACCESS_READ_WRITE:
+         mode_str = "w+b";
+         flags    = O_RDWR | O_CREAT | O_TRUNC;
+#if !defined(ORBIS)
+#if !defined(_WIN32)
+         flags   |= S_IRUSR | S_IWUSR;
+#else
+         flags   |= O_BINARY;
+#endif
+#endif
+         break;
+
+      case RETRO_VFS_FILE_ACCESS_WRITE | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING:
+      case RETRO_VFS_FILE_ACCESS_READ_WRITE | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING:
+         mode_str = "r+b";
+
+         flags    = O_RDWR;
+#if !defined(ORBIS)
+#if !defined(_WIN32)
+         flags   |= S_IRUSR | S_IWUSR;
+#else
+         flags   |= O_BINARY;
+#endif
+#endif
+         break;
+
+      default:
+         goto error;
+   }
+
+   if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+   {
+#ifdef ORBIS
+      int fd = orbisOpen(path, flags, 0644);
+      if (fd < 0)
+      {
+         stream->fd = -1;
+         goto error;
+      }
+      stream->fd    = fd;
+#else
+      FILE *fp;
+#ifdef HAVE_CDROM
+      if (stream->scheme == VFS_SCHEME_CDROM)
+      {
+         retro_vfs_file_open_cdrom(stream, path, mode, hints);
+#if defined(_WIN32) && !defined(_XBOX)
+         if (!stream->fh)
+            goto error;
+#else
+         if (!stream->fp)
+            goto error;
+#endif
+      }
+      else
+#endif
+      {
+         fp = (FILE*)fopen_utf8(path, mode_str);
+
+         if (!fp)
+            goto error;
+
+         stream->fp  = fp;
+      }
+      /* Regarding setvbuf:
+       *
+       * https://www.freebsd.org/cgi/man.cgi?query=setvbuf&apropos=0&sektion=0&manpath=FreeBSD+11.1-RELEASE&arch=default&format=html
+       *
+       * If the size argument is not zero but buf is NULL, 
+       * a buffer of the given size will be allocated immediately, and
+       * released on close. This is an extension to ANSI C.
+       *
+       * Since C89 does not support specifying a NULL buffer 
+       * with a non-zero size, we create and track our own buffer for it.
+       */
+      /* TODO: this is only useful for a few platforms, 
+       * find which and add ifdef */
+#if defined(_3DS)
+      if (stream->scheme != VFS_SCHEME_CDROM)
+      {
+         stream->buf = (char*)calloc(1, 0x10000);
+         if (stream->fp)
+            setvbuf(stream->fp, stream->buf, _IOFBF, 0x10000);
+      }
+#elif defined(WIIU)
+      if (stream->scheme != VFS_SCHEME_CDROM)
+      {
+         const int bufsize = 128*1024;
+         stream->buf = (char*)memalign(0x40, bufsize);
+         if (stream->fp)
+            setvbuf(stream->fp, stream->buf, _IOFBF, bufsize);
+      }
+#elif !defined(PSP)
+      if (stream->scheme != VFS_SCHEME_CDROM)
+      {
+         stream->buf = (char*)calloc(1, 0x4000);
+         if (stream->fp)
+            setvbuf(stream->fp, stream->buf, _IOFBF, 0x4000);
+      }
+#endif
+#endif
+   }
+   else
+   {
+#if defined(_WIN32) && !defined(_XBOX)
+#if defined(LEGACY_WIN32)
+      char *path_local    = utf8_to_local_string_alloc(path);
+      stream->fd          = open(path_local, flags, 0);
+      if (path_local)
+         free(path_local);
+#else
+      wchar_t * path_wide = utf8_to_utf16_string_alloc(path);
+      stream->fd          = _wopen(path_wide, flags, 0);
+      if (path_wide)
+         free(path_wide);
+#endif
+#else
+      stream->fd          = open(path, flags, 0);
+#endif
+
+      if (stream->fd == -1)
+         goto error;
+
+#ifdef HAVE_MMAP
+      if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+      {
+         stream->mappos  = 0;
+         stream->mapped  = NULL;
+         stream->mapsize = retro_vfs_file_seek_internal(stream, 0, SEEK_END);
+
+         if (stream->mapsize == (uint64_t)-1)
+            goto error;
+
+         retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
+
+         stream->mapped = (uint8_t*)mmap((void*)0,
+               stream->mapsize, PROT_READ,  MAP_SHARED, stream->fd, 0);
+
+         if (stream->mapped == MAP_FAILED)
+            stream->hints &= ~RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS;
+      }
+#endif
+   }
+#ifdef ORBIS
+   stream->size = orbisLseek(stream->fd, 0, SEEK_END);
+   orbisLseek(stream->fd, 0, SEEK_SET);
+#else
+#ifdef HAVE_CDROM
+   if (stream->scheme == VFS_SCHEME_CDROM)
+   {
+      retro_vfs_file_seek_cdrom(stream, 0, SEEK_SET);
+      retro_vfs_file_seek_cdrom(stream, 0, SEEK_END);
+
+      stream->size = retro_vfs_file_tell_impl(stream);
+
+      retro_vfs_file_seek_cdrom(stream, 0, SEEK_SET);
+   }
+   else
+#endif
+   {
+      retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
+      retro_vfs_file_seek_internal(stream, 0, SEEK_END);
+
+      stream->size = retro_vfs_file_tell_impl(stream);
+
+      retro_vfs_file_seek_internal(stream, 0, SEEK_SET);
+   }
+#endif
+   return stream;
+
+error:
+   retro_vfs_file_close_impl(stream);
+   return NULL;
+}
+
+int retro_vfs_file_close_impl(libretro_vfs_implementation_file *stream)
+{
+   if (!stream)
+      return -1;
+
+#ifdef HAVE_CDROM
+   if (stream->scheme == VFS_SCHEME_CDROM)
+   {
+      retro_vfs_file_close_cdrom(stream);
+      goto end;
+   }
+#endif
+
+   if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+   {
+      if (stream->fp)
+         fclose(stream->fp);
+   }
+   else
+   {
+#ifdef HAVE_MMAP
+      if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+         munmap(stream->mapped, stream->mapsize);
+#endif
+   }
+
+   if (stream->fd > 0)
+   {
+#ifdef ORBIS
+      orbisClose(stream->fd);
+      stream->fd = -1;
+#else
+      close(stream->fd);
+#endif
+   }
+#ifdef HAVE_CDROM
+end:
+   if (stream->cdrom.cue_buf)
+      free(stream->cdrom.cue_buf);
+#endif
+   if (stream->buf)
+      free(stream->buf);
+
+   if (stream->orig_path)
+      free(stream->orig_path);
+
+   free(stream);
+
+   return 0;
+}
+
+int retro_vfs_file_error_impl(libretro_vfs_implementation_file *stream)
+{
+#ifdef HAVE_CDROM
+   if (stream->scheme == VFS_SCHEME_CDROM)
+      return retro_vfs_file_error_cdrom(stream);
+#endif
+#ifdef ORBIS
+   /* TODO/FIXME - implement this? */
+   return 0;
+#else
+   return ferror(stream->fp);
+#endif
+}
+
+int64_t retro_vfs_file_size_impl(libretro_vfs_implementation_file *stream)
+{
+   if (stream)
+      return stream->size;
+   return 0;
+}
+
+int64_t retro_vfs_file_truncate_impl(libretro_vfs_implementation_file *stream, int64_t length)
+{
+   if (!stream)
+      return -1;
+
+#ifdef _WIN32
+   if (_chsize(_fileno(stream->fp), length) != 0)
+      return -1;
+#elif !defined(VITA) && !defined(PSP) && !defined(PS2) && !defined(ORBIS) && (!defined(SWITCH) || defined(HAVE_LIBNX))
+   if (ftruncate(fileno(stream->fp), (off_t)length) != 0)
+      return -1;
+#endif
+
+   return 0;
+}
+
+int64_t retro_vfs_file_tell_impl(libretro_vfs_implementation_file *stream)
+{
+   if (!stream)
+      return -1;
+
+   if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+   {
+#ifdef HAVE_CDROM
+      if (stream->scheme == VFS_SCHEME_CDROM)
+         return retro_vfs_file_tell_cdrom(stream);
+#endif
+#ifdef ORBIS
+      {
+         int64_t ret = orbisLseek(stream->fd, 0, SEEK_CUR);
+         if (ret < 0)
+            return -1;
+         return ret;
+      }
+#else
+#ifdef ATLEAST_VC2005
+      /* VC2005 and up have a special 64-bit ftell */
+      return _ftelli64(stream->fp);
+#elif defined(HAVE_64BIT_OFFSETS)
+      return ftello(stream->fp);
+#else
+      return ftell(stream->fp);
+#endif
+#endif
+   }
+#ifdef HAVE_MMAP
+   /* Need to check stream->mapped because this function
+    * is called in filestream_open() */
+   if (stream->mapped && stream->hints & 
+         RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+      return stream->mappos;
+#endif
+   if (lseek(stream->fd, 0, SEEK_CUR) < 0)
+      return -1;
+
+   return 0;
+}
+
+int64_t retro_vfs_file_seek_impl(libretro_vfs_implementation_file *stream,
+      int64_t offset, int seek_position)
+{
+   int whence = -1;
+   switch (seek_position)
+   {
+      case RETRO_VFS_SEEK_POSITION_START:
+         whence = SEEK_SET;
+         break;
+      case RETRO_VFS_SEEK_POSITION_CURRENT:
+         whence = SEEK_CUR;
+         break;
+      case RETRO_VFS_SEEK_POSITION_END:
+         whence = SEEK_END;
+         break;
+   }
+
+   return retro_vfs_file_seek_internal(stream, offset, whence);
+}
+
+int64_t retro_vfs_file_read_impl(libretro_vfs_implementation_file *stream,
+      void *s, uint64_t len)
+{
+   if (!stream || !s)
+      return -1;
+
+   if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+   {
+#ifdef HAVE_CDROM
+      if (stream->scheme == VFS_SCHEME_CDROM)
+         return retro_vfs_file_read_cdrom(stream, s, len);
+#endif
+#ifdef ORBIS
+      if (orbisRead(stream->fd, s, (size_t)len) < 0)
+         return -1;
+      return 0;
+#else
+      return fread(s, 1, (size_t)len, stream->fp);
+#endif
+   }
+#ifdef HAVE_MMAP
+   if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+   {
+      if (stream->mappos > stream->mapsize)
+         return -1;
+
+      if (stream->mappos + len > stream->mapsize)
+         len = stream->mapsize - stream->mappos;
+
+      memcpy(s, &stream->mapped[stream->mappos], len);
+      stream->mappos += len;
+
+      return len;
+   }
+#endif
+
+   return read(stream->fd, s, (size_t)len);
+}
+
+int64_t retro_vfs_file_write_impl(libretro_vfs_implementation_file *stream, const void *s, uint64_t len)
+{
+   if (!stream)
+      return -1;
+
+   if ((stream->hints & RFILE_HINT_UNBUFFERED) == 0)
+   {
+#ifdef ORBIS
+      if (orbisWrite(stream->fd, s, (size_t)len) < 0)
+         return -1;
+      return 0;
+#else
+      return fwrite(s, 1, (size_t)len, stream->fp);
+#endif
+   }
+
+#ifdef HAVE_MMAP
+   if (stream->hints & RETRO_VFS_FILE_ACCESS_HINT_FREQUENT_ACCESS)
+      return -1;
+#endif
+   return write(stream->fd, s, (size_t)len);
+}
+
+int retro_vfs_file_flush_impl(libretro_vfs_implementation_file *stream)
+{
+   if (!stream)
+      return -1;
+#ifdef ORBIS
+   return 0;
+#else
+   return fflush(stream->fp) == 0 ? 0 : -1;
+#endif
+}
+
+int retro_vfs_file_remove_impl(const char *path)
+{
+#if defined(_WIN32) && !defined(_XBOX)
+   /* Win32 (no Xbox) */
+
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
+   char *path_local    = NULL;
+#else
+   wchar_t *path_wide  = NULL;
+#endif
+   if (!path || !*path)
+      return -1;
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
+   path_local = utf8_to_local_string_alloc(path);
+
+   if (path_local)
+   {
+      int ret = remove(path_local);
+      free(path_local);
+
+      if (ret == 0)
+         return 0;
+   }
+#else
+   path_wide = utf8_to_utf16_string_alloc(path);
+
+   if (path_wide)
+   {
+      int ret = _wremove(path_wide);
+      free(path_wide);
+
+      if (ret == 0)
+         return 0;
+   }
+#endif
+   return -1;
+#elif defined(ORBIS)
+   /* Orbis
+    * TODO/FIXME - stub for now */
+   return 0;
+#else
+   if (remove(path) == 0)
+      return 0;
+   return -1;
+#endif
+}
+
+int retro_vfs_file_rename_impl(const char *old_path, const char *new_path)
+{
+#if defined(_WIN32) && !defined(_XBOX)
+   /* Win32 (no Xbox) */
+   int ret                 = -1;
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
+   char *old_path_local    = NULL;
+#else
+   wchar_t *old_path_wide  = NULL;
+#endif
+
+   if (!old_path || !*old_path || !new_path || !*new_path)
+      return -1;
+
+#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
+   old_path_local = utf8_to_local_string_alloc(old_path);
+
+   if (old_path_local)
+   {
+      char *new_path_local = utf8_to_local_string_alloc(new_path);
+
+      if (new_path_local)
+      {
+         if (rename(old_path_local, new_path_local) == 0)
+            ret = 0;
+         free(new_path_local);
+      }
+
+      free(old_path_local);
+   }
+#else
+   old_path_wide = utf8_to_utf16_string_alloc(old_path);
+
+   if (old_path_wide)
+   {
+      wchar_t *new_path_wide = utf8_to_utf16_string_alloc(new_path);
+
+      if (new_path_wide)
+      {
+         if (_wrename(old_path_wide, new_path_wide) == 0)
+            ret = 0;
+         free(new_path_wide);
+      }
+
+      free(old_path_wide);
+   }
+#endif
+   return ret;
+
+#elif defined(ORBIS)
+   /* Orbis */
+   /* TODO/FIXME - Stub for now */
+   if (!old_path || !*old_path || !new_path || !*new_path)
+      return -1;
+   return 0;
+
+#else
+   /* Every other platform */
+   if (!old_path || !*old_path || !new_path || !*new_path)
+      return -1;
+   return rename(old_path, new_path) == 0 ? 0 : -1;
+#endif
+}
+
+const char *retro_vfs_file_get_path_impl(
+      libretro_vfs_implementation_file *stream)
+{
+   /* should never happen, do something noisy so caller can be fixed */
+   if (!stream)
+      abort();
+   return stream->orig_path;
+}
+
+int retro_vfs_stat_impl(const char *path, int32_t *size)
+{
+   bool is_dir               = false;
+   bool is_character_special = false;
+#if defined(VITA) || defined(PSP)
+   /* Vita / PSP */
+   SceIoStat buf;
+   int dir_ret;
+   char *tmp                 = NULL;
+   size_t len                = 0;
+
+   if (!path || !*path)
+      return 0;
+
+   tmp                       = strdup(path);
+   len                       = strlen(tmp);
+   if (tmp[len-1] == '/')
+      tmp[len-1] = '\0';
+
+   dir_ret                   = sceIoGetstat(tmp, &buf);
+   free(tmp);
+   if (dir_ret < 0)
+      return 0;
+
+   if (size)
+      *size                  = (int32_t)buf.st_size;
+
+   is_dir                    = FIO_S_ISDIR(buf.st_mode);
+#elif defined(ORBIS)
+   /* Orbis */
+   int dir_ret               = 0;
+
+   if (!path || !*path)
+      return 0;
+
+   if (size)
+      *size                  = (int32_t)buf.st_size;
+
+   dir_ret                   = orbisDopen(path);
+   is_dir                    = dir_ret > 0;
+   orbisDclose(dir_ret);
+
+   is_character_special      = S_ISCHR(buf.st_mode);
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+   /* Lowlevel Lv2 */
+   sysFSStat buf;
+
+   if (!path || !*path)
+      return 0;
+   if (sysFsStat(path, &buf) < 0)
+      return 0;
+
+   if (size)
+      *size                  = (int32_t)buf.st_size;
+
+   is_dir                    = ((buf.st_mode & S_IFMT) == S_IFDIR);
+#elif defined(_WIN32)
+   /* Windows */
+   DWORD file_info;
+   struct _stat buf;
+#if defined(LEGACY_WIN32)
+   char *path_local          = NULL;
+#else
+   wchar_t *path_wide        = NULL;
+#endif
+
+   if (!path || !*path)
+      return 0;
+
+#if defined(LEGACY_WIN32)
+   path_local                = utf8_to_local_string_alloc(path);
+   file_info                 = GetFileAttributes(path_local);
+
+   if (!string_is_empty(path_local))
+      _stat(path_local, &buf);
+
+   if (path_local)
+      free(path_local);
+#else
+   path_wide                 = utf8_to_utf16_string_alloc(path);
+   file_info                 = GetFileAttributesW(path_wide);
+
+   _wstat(path_wide, &buf);
+
+   if (path_wide)
+      free(path_wide);
+#endif
+
+   if (file_info == INVALID_FILE_ATTRIBUTES)
+      return 0;
+
+   if (size)
+      *size = (int32_t)buf.st_size;
+
+   is_dir = (file_info & FILE_ATTRIBUTE_DIRECTORY);
+
+#elif defined(GEKKO)
+   /* On GEKKO platforms, paths cannot have
+    * trailing slashes - we must therefore
+    * remove them */
+   char *path_buf = NULL;
+   int stat_ret   = -1;
+   struct stat stat_buf;
+   size_t len;
+
+   if (string_is_empty(path))
+      return 0;
+
+   path_buf = strdup(path);
+   if (!path_buf)
+      return 0;
+
+   len = strlen(path_buf);
+   if (len > 0)
+      if (path_buf[len - 1] == '/')
+         path_buf[len - 1] = '\0';
+
+   stat_ret = stat(path_buf, &stat_buf);
+   free(path_buf);
+
+   if (stat_ret < 0)
+      return 0;
+
+   if (size)
+      *size             = (int32_t)stat_buf.st_size;
+
+   is_dir               = S_ISDIR(stat_buf.st_mode);
+   is_character_special = S_ISCHR(stat_buf.st_mode);
+
+#else
+   /* Every other platform */
+   struct stat buf;
+
+   if (!path || !*path)
+      return 0;
+   if (stat(path, &buf) < 0)
+      return 0;
+
+   if (size)
+      *size             = (int32_t)buf.st_size;
+
+   is_dir               = S_ISDIR(buf.st_mode);
+   is_character_special = S_ISCHR(buf.st_mode);
+#endif
+   return RETRO_VFS_STAT_IS_VALID | (is_dir ? RETRO_VFS_STAT_IS_DIRECTORY : 0) | (is_character_special ? RETRO_VFS_STAT_IS_CHARACTER_SPECIAL : 0);
+}
+
+#if defined(VITA)
+#define path_mkdir_error(ret) (((ret) == SCE_ERROR_ERRNO_EEXIST))
+#elif defined(PSP) || defined(PS2) || defined(_3DS) || defined(WIIU) || defined(SWITCH) || defined(ORBIS)
+#define path_mkdir_error(ret) ((ret) == -1)
+#else
+#define path_mkdir_error(ret) ((ret) < 0 && errno == EEXIST)
+#endif
+
+int retro_vfs_mkdir_impl(const char *dir)
+{
+#if defined(_WIN32)
+#ifdef LEGACY_WIN32
+   int ret        = _mkdir(dir);
+#else
+   wchar_t *dir_w = utf8_to_utf16_string_alloc(dir);
+   int       ret  = -1;
+
+   if (dir_w)
+   {
+      ret = _wmkdir(dir_w);
+      free(dir_w);
+   }
+#endif
+#elif defined(IOS)
+   int ret = mkdir(dir, 0755);
+#elif defined(VITA) || defined(PSP)
+   int ret = sceIoMkdir(dir, 0777);
+#elif defined(ORBIS)
+   int ret = orbisMkdir(dir, 0755);
+#elif defined(__QNX__)
+   int ret = mkdir(dir, 0777);
+#elif defined(GEKKO)
+   /* On GEKKO platforms, mkdir() fails if
+    * the path has a trailing slash. We must
+    * therefore remove it. */
+   int ret = -1;
+   if (!string_is_empty(dir))
+   {
+      char *dir_buf = strdup(dir);
+
+      if (dir_buf)
+      {
+         size_t len = strlen(dir_buf);
+
+         if (len > 0)
+            if (dir_buf[len - 1] == '/')
+               dir_buf[len - 1] = '\0';
+
+         ret = mkdir(dir_buf, 0750);
+
+         free(dir_buf);
+      }
+   }
+#else
+   int ret = mkdir(dir, 0750);
+#endif
+
+   if (path_mkdir_error(ret))
+      return -2;
+   return ret < 0 ? -1 : 0;
+}
+
+#ifdef VFS_FRONTEND
+struct retro_vfs_dir_handle
+#else
+struct libretro_vfs_implementation_dir
+#endif
+{
+   char* orig_path;
+#if defined(_WIN32)
+#if defined(LEGACY_WIN32)
+   WIN32_FIND_DATA entry;
+#else
+   WIN32_FIND_DATAW entry;
+#endif
+   HANDLE directory;
+   bool next;
+   char path[PATH_MAX_LENGTH];
+#elif defined(VITA) || defined(PSP)
+   SceUID directory;
+   SceIoDirent entry;
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+   int error;
+   int directory;
+   sysFSDirent entry;
+#elif defined(ORBIS)
+   int directory;
+   struct dirent entry;
+#else
+   DIR *directory;
+   const struct dirent *entry;
+#endif
+};
+
+static bool dirent_check_error(libretro_vfs_implementation_dir *rdir)
+{
+#if defined(_WIN32)
+   return (rdir->directory == INVALID_HANDLE_VALUE);
+#elif defined(VITA) || defined(PSP) || defined(ORBIS)
+   return (rdir->directory < 0);
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+   return (rdir->error != FS_SUCCEEDED);
+#else
+   return !(rdir->directory);
+#endif
+}
+
+libretro_vfs_implementation_dir *retro_vfs_opendir_impl(
+      const char *name, bool include_hidden)
+{
+#if defined(_WIN32)
+   unsigned path_len;
+   char path_buf[1024];
+   size_t copied      = 0;
+#if defined(LEGACY_WIN32)
+   char *path_local   = NULL;
+#else
+   wchar_t *path_wide = NULL;
+#endif
+#endif
+   libretro_vfs_implementation_dir *rdir;
+
+   /*Reject null or empty string paths*/
+   if (!name || (*name == 0))
+      return NULL;
+
+   /*Allocate RDIR struct. Tidied later with retro_closedir*/
+   rdir = (libretro_vfs_implementation_dir*)calloc(1, sizeof(*rdir));
+   if (!rdir)
+      return NULL;
+
+   rdir->orig_path       = strdup(name);
+
+#if defined(_WIN32)
+   path_buf[0]           = '\0';
+   path_len              = strlen(name);
+
+   copied                = strlcpy(path_buf, name, sizeof(path_buf));
+
+   /* Non-NT platforms don't like extra slashes in the path */
+   if (name[path_len - 1] != '\\')
+      path_buf[copied++]   = '\\';
+
+   path_buf[copied]        = '*';
+   path_buf[copied+1]      = '\0';
+
+#if defined(LEGACY_WIN32)
+   path_local              = utf8_to_local_string_alloc(path_buf);
+   rdir->directory         = FindFirstFile(path_local, &rdir->entry);
+
+   if (path_local)
+      free(path_local);
+#else
+   path_wide               = utf8_to_utf16_string_alloc(path_buf);
+   rdir->directory         = FindFirstFileW(path_wide, &rdir->entry);
+
+   if (path_wide)
+      free(path_wide);
+#endif
+
+#elif defined(VITA) || defined(PSP)
+   rdir->directory       = sceIoDopen(name);
+#elif defined(_3DS)
+   rdir->directory       = !string_is_empty(name) ? opendir(name) : NULL;
+   rdir->entry           = NULL;
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+   rdir->error           = sysFsOpendir(name, &rdir->directory);
+#elif defined(ORBIS)
+   rdir->directory       = orbisDopen(name);
+#else
+   rdir->directory       = opendir(name);
+   rdir->entry           = NULL;
+#endif
+
+#ifdef _WIN32
+   if (include_hidden)
+      rdir->entry.dwFileAttributes |= FILE_ATTRIBUTE_HIDDEN;
+   else
+      rdir->entry.dwFileAttributes &= ~FILE_ATTRIBUTE_HIDDEN;
+#endif
+
+   if (rdir->directory && !dirent_check_error(rdir))
+      return rdir;
+
+   retro_vfs_closedir_impl(rdir);
+   return NULL;
+}
+
+bool retro_vfs_readdir_impl(libretro_vfs_implementation_dir *rdir)
+{
+#if defined(_WIN32)
+   if (rdir->next)
+#if defined(LEGACY_WIN32)
+      return (FindNextFile(rdir->directory, &rdir->entry) != 0);
+#else
+      return (FindNextFileW(rdir->directory, &rdir->entry) != 0);
+#endif
+
+   rdir->next = true;
+   return (rdir->directory != INVALID_HANDLE_VALUE);
+#elif defined(VITA) || defined(PSP)
+   return (sceIoDread(rdir->directory, &rdir->entry) > 0);
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+   uint64_t nread;
+   rdir->error = sysFsReaddir(rdir->directory, &rdir->entry, &nread);
+   return (nread != 0);
+#elif defined(ORBIS)
+   return (orbisDread(rdir->directory, &rdir->entry) > 0);
+#else
+   return ((rdir->entry = readdir(rdir->directory)) != NULL);
+#endif
+}
+
+const char *retro_vfs_dirent_get_name_impl(libretro_vfs_implementation_dir *rdir)
+{
+#if defined(_WIN32)
+#if defined(LEGACY_WIN32)
+   char *name       = local_to_utf8_string_alloc(rdir->entry.cFileName);
+#else
+   char *name       = utf16_to_utf8_string_alloc(rdir->entry.cFileName);
+#endif
+   memset(rdir->entry.cFileName, 0, sizeof(rdir->entry.cFileName));
+   strlcpy((char*)rdir->entry.cFileName, name, sizeof(rdir->entry.cFileName));
+   if (name)
+      free(name);
+   return (char*)rdir->entry.cFileName;
+#elif defined(VITA) || defined(PSP) || defined(ORBIS) || defined(__PSL1GHT__) || defined(__PS3__)
+   return rdir->entry.d_name;
+#else
+   if (!rdir || !rdir->entry)
+      return NULL;
+   return rdir->entry->d_name;
+#endif
+}
+
+bool retro_vfs_dirent_is_dir_impl(libretro_vfs_implementation_dir *rdir)
+{
+#if defined(_WIN32)
+   const WIN32_FIND_DATA *entry = (const WIN32_FIND_DATA*)&rdir->entry;
+   return entry->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
+#elif defined(PSP) || defined(VITA)
+   const SceIoDirent *entry     = (const SceIoDirent*)&rdir->entry;
+#if defined(PSP)
+   return (entry->d_stat.st_attr & FIO_SO_IFDIR) == FIO_SO_IFDIR;
+#elif defined(VITA)
+   return SCE_S_ISDIR(entry->d_stat.st_mode);
+#endif
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+   sysFSDirent *entry          = (sysFSDirent*)&rdir->entry;
+   return (entry->d_type == FS_TYPE_DIR);
+#elif defined(ORBIS)
+   const struct dirent *entry   = &rdir->entry;
+   if (entry->d_type == DT_DIR)
+      return true;
+   if (!(entry->d_type == DT_UNKNOWN || entry->d_type == DT_LNK))
+      return false;
+#else
+   struct stat buf;
+   char path[PATH_MAX_LENGTH];
+#if defined(DT_DIR)
+   const struct dirent *entry = (const struct dirent*)rdir->entry;
+   if (entry->d_type == DT_DIR)
+      return true;
+   /* This can happen on certain file systems. */
+   if (!(entry->d_type == DT_UNKNOWN || entry->d_type == DT_LNK))
+      return false;
+#endif
+   /* dirent struct doesn't have d_type, do it the slow way ... */
+   path[0] = '\0';
+   fill_pathname_join(path, rdir->orig_path, retro_vfs_dirent_get_name_impl(rdir), sizeof(path));
+   if (stat(path, &buf) < 0)
+      return false;
+   return S_ISDIR(buf.st_mode);
+#endif
+}
+
+int retro_vfs_closedir_impl(libretro_vfs_implementation_dir *rdir)
+{
+   if (!rdir)
+      return -1;
+
+#if defined(_WIN32)
+   if (rdir->directory != INVALID_HANDLE_VALUE)
+      FindClose(rdir->directory);
+#elif defined(VITA) || defined(PSP)
+   sceIoDclose(rdir->directory);
+#elif defined(__PSL1GHT__) || defined(__PS3__)
+   rdir->error = sysFsClosedir(rdir->directory);
+#elif defined(ORBIS)
+   orbisDclose(rdir->directory);
+#else
+   if (rdir->directory)
+      closedir(rdir->directory);
+#endif
+
+   if (rdir->orig_path)
+      free(rdir->orig_path);
+   free(rdir);
+   return 0;
+}