342 lines
10 KiB
Objective-C
342 lines
10 KiB
Objective-C
//
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// OutputCoreAudio.m
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// Cog
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//
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// Created by Vincent Spader on 8/2/05.
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// Copyright 2005 Vincent Spader. All rights reserved.
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//
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#import "OutputCoreAudio.h"
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#import "OutputNode.h"
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#import "Logging.h"
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@implementation OutputCoreAudio
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- (id)initWithController:(OutputNode *)c
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{
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self = [super init];
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if (self)
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{
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outputController = c;
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outputUnit = NULL;
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[[NSUserDefaultsController sharedUserDefaultsController] addObserver:self forKeyPath:@"values.outputDevice" options:0 context:NULL];
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}
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return self;
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}
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static OSStatus Sound_Renderer(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData)
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{
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OutputCoreAudio *output = (__bridge OutputCoreAudio *)inRefCon;
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OSStatus err = noErr;
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void *readPointer = ioData->mBuffers[0].mData;
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int amountToRead, amountRead;
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if ([output->outputController shouldContinue] == NO)
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{
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AudioOutputUnitStop(output->outputUnit);
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// [output stop];
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return err;
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}
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amountToRead = inNumberFrames*(output->deviceFormat.mBytesPerPacket);
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amountRead = [output->outputController readData:(readPointer) amount:amountToRead];
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if ((amountRead < amountToRead) && [output->outputController endOfStream] == NO) //Try one more time! for track changes!
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{
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int amountRead2; //Use this since return type of readdata isnt known...may want to fix then can do a simple += to readdata
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amountRead2 = [output->outputController readData:(readPointer+amountRead) amount:amountToRead-amountRead];
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amountRead += amountRead2;
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}
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ioData->mBuffers[0].mDataByteSize = amountRead;
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ioData->mBuffers[0].mNumberChannels = output->deviceFormat.mChannelsPerFrame;
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ioData->mNumberBuffers = 1;
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return err;
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}
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- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
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{
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if ([keyPath isEqualToString:@"values.outputDevice"]) {
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NSDictionary *device = [[[NSUserDefaultsController sharedUserDefaultsController] defaults] objectForKey:@"outputDevice"];
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NSNumber *deviceID = [device objectForKey:@"deviceID"];
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[self setOutputDevice:[deviceID longValue]];
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}
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}
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- (BOOL)setOutputDevice:(AudioDeviceID)outputDevice
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{
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// Set the output device
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AudioDeviceID deviceID = outputDevice; //XXX use default if null
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OSStatus err;
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if (outputDevice == -1) {
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DLog(@"DEVICE IS -1");
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UInt32 size = sizeof(AudioDeviceID);
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AudioObjectPropertyAddress theAddress = {
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.mSelector = kAudioHardwarePropertyDefaultOutputDevice,
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.mScope = kAudioObjectPropertyScopeGlobal,
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.mElement = kAudioObjectPropertyElementMaster
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};
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err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &theAddress, 0, NULL, &size, &deviceID);
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if (err != noErr) {
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ALog(@"THERES NO DEFAULT OUTPUT DEVICE");
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return NO;
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}
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}
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printf("DEVICE: %i\n", deviceID);
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outputDeviceID = deviceID;
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err = AudioUnitSetProperty(outputUnit,
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kAudioOutputUnitProperty_CurrentDevice,
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kAudioUnitScope_Output,
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0,
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&deviceID,
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sizeof(AudioDeviceID));
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if (err != noErr) {
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ALog(@"No output device could be found, your random error code is %d. Have a nice day!", err);
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return NO;
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}
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return YES;
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}
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- (BOOL)setup
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{
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if (outputUnit)
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[self stop];
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AudioObjectPropertyAddress propertyAddress = {
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.mElement = kAudioObjectPropertyElementMaster
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};
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UInt32 dataSize;
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ComponentDescription desc;
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OSStatus err;
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desc.componentType = kAudioUnitType_Output;
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desc.componentSubType = kAudioUnitSubType_DefaultOutput;
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desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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desc.componentFlags = 0;
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desc.componentFlagsMask = 0;
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Component comp = FindNextComponent(NULL, &desc); //Finds an component that meets the desc spec's
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if (comp == NULL)
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return NO;
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err = OpenAComponent(comp, &outputUnit); //gains access to the services provided by the component
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if (err)
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return NO;
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// Initialize AudioUnit
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err = AudioUnitInitialize(outputUnit);
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if (err != noErr)
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return NO;
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// Setup the output device before mucking with settings
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NSDictionary *device = [[[NSUserDefaultsController sharedUserDefaultsController] defaults] objectForKey:@"outputDevice"];
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if (device) {
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BOOL ok = [self setOutputDevice:[[device objectForKey:@"deviceID"] longValue]];
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if (!ok) {
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//Ruh roh.
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[self setOutputDevice: -1];
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[[[NSUserDefaultsController sharedUserDefaultsController] defaults] removeObjectForKey:@"outputDevice"];
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}
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}
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else {
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[self setOutputDevice: -1];
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}
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UInt32 size = sizeof (AudioStreamBasicDescription);
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Boolean outWritable;
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//Gets the size of the Stream Format Property and if it is writable
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AudioUnitGetPropertyInfo(outputUnit,
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kAudioUnitProperty_StreamFormat,
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kAudioUnitScope_Output,
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0,
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&size,
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&outWritable);
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//Get the current stream format of the output
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err = AudioUnitGetProperty (outputUnit,
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kAudioUnitProperty_StreamFormat,
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kAudioUnitScope_Output,
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0,
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&deviceFormat,
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&size);
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if (err != noErr)
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return NO;
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// change output format...
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// The default channel map is silence
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SInt32 deviceChannelMap [deviceFormat.mChannelsPerFrame];
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for(UInt32 i = 0; i < deviceFormat.mChannelsPerFrame; ++i)
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deviceChannelMap[i] = -1;
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// Determine the device's preferred stereo channels for output mapping
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if(1 == deviceFormat.mChannelsPerFrame || 2 == deviceFormat.mChannelsPerFrame) {
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propertyAddress.mSelector = kAudioDevicePropertyPreferredChannelsForStereo;
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propertyAddress.mScope = kAudioDevicePropertyScopeOutput;
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UInt32 preferredStereoChannels [2] = { 1, 2 };
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if(AudioObjectHasProperty(outputDeviceID, &propertyAddress)) {
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dataSize = sizeof(preferredStereoChannels);
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err = AudioObjectGetPropertyData(outputDeviceID, &propertyAddress, 0, nil, &dataSize, &preferredStereoChannels);
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}
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AudioChannelLayout stereoLayout;
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stereoLayout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
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const AudioChannelLayout *specifier [1] = { &stereoLayout };
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SInt32 stereoChannelMap [2] = { 1, 2 };
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dataSize = sizeof(stereoChannelMap);
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err = AudioFormatGetProperty(kAudioFormatProperty_ChannelMap, sizeof(specifier), specifier, &dataSize, stereoChannelMap);
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if(noErr == err) {
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deviceChannelMap[preferredStereoChannels[0] - 1] = stereoChannelMap[0];
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deviceChannelMap[preferredStereoChannels[1] - 1] = stereoChannelMap[1];
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}
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else {
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// Just use a channel map that makes sense
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deviceChannelMap[preferredStereoChannels[0] - 1] = 0;
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deviceChannelMap[preferredStereoChannels[1] - 1] = 1;
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}
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}
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// Determine the device's preferred multichannel layout
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else {
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propertyAddress.mSelector = kAudioDevicePropertyPreferredChannelLayout;
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propertyAddress.mScope = kAudioDevicePropertyScopeOutput;
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if(AudioObjectHasProperty(outputDeviceID, &propertyAddress)) {
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err = AudioObjectGetPropertyDataSize(outputDeviceID, &propertyAddress, 0, nil, &dataSize);
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AudioChannelLayout *preferredChannelLayout = (AudioChannelLayout *)(malloc(dataSize));
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err = AudioObjectGetPropertyData(outputDeviceID, &propertyAddress, 0, nil, &dataSize, preferredChannelLayout);
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const AudioChannelLayout *specifier [1] = { preferredChannelLayout };
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// Not all channel layouts can be mapped, so handle failure with a generic mapping
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dataSize = (UInt32)sizeof(deviceChannelMap);
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err = AudioFormatGetProperty(kAudioFormatProperty_ChannelMap, sizeof(specifier), specifier, &dataSize, deviceChannelMap);
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if(noErr != err) {
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// Just use a channel map that makes sense
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for(UInt32 i = 0; i < deviceFormat.mChannelsPerFrame; ++i)
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deviceChannelMap[i] = i;
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}
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free(preferredChannelLayout), preferredChannelLayout = nil;
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}
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else {
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// Just use a channel map that makes sense
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for(UInt32 i = 0; i < deviceFormat.mChannelsPerFrame; ++i)
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deviceChannelMap[i] = i;
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}
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}
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///Seems some 3rd party devices return incorrect stuff...or I just don't like noninterleaved data.
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deviceFormat.mFormatFlags &= ~kLinearPCMFormatFlagIsNonInterleaved;
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// deviceFormat.mFormatFlags &= ~kLinearPCMFormatFlagIsFloat;
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// deviceFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
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deviceFormat.mBytesPerFrame = deviceFormat.mChannelsPerFrame*(deviceFormat.mBitsPerChannel/8);
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deviceFormat.mBytesPerPacket = deviceFormat.mBytesPerFrame * deviceFormat.mFramesPerPacket;
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err = AudioUnitSetProperty (outputUnit,
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kAudioUnitProperty_StreamFormat,
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kAudioUnitScope_Output,
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0,
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&deviceFormat,
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size);
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//Set the stream format of the output to match the input
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err = AudioUnitSetProperty (outputUnit,
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kAudioUnitProperty_StreamFormat,
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kAudioUnitScope_Input,
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0,
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&deviceFormat,
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size);
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size = sizeof(deviceChannelMap);
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err = AudioUnitSetProperty(outputUnit,
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kAudioOutputUnitProperty_ChannelMap,
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kAudioUnitScope_Output,
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0,
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deviceChannelMap,
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size);
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//setup render callbacks
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renderCallback.inputProc = Sound_Renderer;
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renderCallback.inputProcRefCon = (__bridge void * _Nullable)(self);
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AudioUnitSetProperty(outputUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &renderCallback, sizeof(AURenderCallbackStruct));
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[outputController setFormat:&deviceFormat];
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return (err == noErr);
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}
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- (void)setVolume:(double)v
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{
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AudioUnitSetParameter (outputUnit,
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kHALOutputParam_Volume,
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kAudioUnitScope_Global,
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0,
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v * 0.01f,
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0);
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}
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- (void)start
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{
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AudioOutputUnitStart(outputUnit);
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}
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- (void)stop
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{
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if (outputUnit)
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{
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AudioOutputUnitStop(outputUnit);
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AudioUnitUninitialize (outputUnit);
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CloseComponent(outputUnit);
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outputUnit = NULL;
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}
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}
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- (void)dealloc
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{
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[self stop];
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[[NSUserDefaultsController sharedUserDefaultsController] removeObserver:self forKeyPath:@"values.outputDevice"];
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}
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- (void)pause
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{
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AudioOutputUnitStop(outputUnit);
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}
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- (void)resume
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{
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AudioOutputUnitStart(outputUnit);
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}
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@end
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