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Cog Audio: Implemented device output and input file format changing support

CQTexperiment
Christopher Snowhill 2022-01-12 21:31:22 -08:00
parent 9feaffc92d
commit 5fef62dd03
4 changed files with 91 additions and 57 deletions
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10
Audio/Chain/InputNode.m
View File

@ -99,10 +99,10 @@
{
DLog(@"SOMETHING CHANGED!");
if ([keyPath isEqual:@"properties"]) {
//Setup converter!
//Inform something of properties change
//Disable support until it is properly implemented.
//[controller inputFormatDidChange: propertiesToASBD([decoder properties])];
DLog(@"Input format changed");
// Converter doesn't need resetting for this, as output format hasn't changed
ConverterNode *converter = [[[controller controller] bufferChain] converter];
[converter inputFormatDidChange:[[[controller controller] bufferChain] inputFormat]];
}
else if ([keyPath isEqual:@"metadata"]) {
//Inform something of metadata change
@ -125,8 +125,8 @@
DLog(@"SEEKING! Resetting Buffer");
amountInBuffer = 0;
// This resets the converter's buffer
[self resetBuffer];
[converter resetBuffer];
[converter inputFormatDidChange:[[[controller controller] bufferChain] inputFormat]];
DLog(@"Reset buffer!");

14
Audio/Chain/OutputNode.m
View File

@ -89,6 +89,20 @@
- (void)setFormat:(AudioStreamBasicDescription *)f
{
format = *f;
BufferChain *bufferChain = [controller bufferChain];
if (bufferChain)
{
InputNode *input = [bufferChain inputNode];
ConverterNode *converter = [bufferChain converter];
if (input && converter)
{
// Need to clear the buffer, as it contains converted output
// targeting the previous output format
[input resetBuffer];
[converter setOutputFormat:format];
[converter inputFormatDidChange:[bufferChain inputFormat]];
}
}
}
- (void)close

2
Audio/Output/OutputCoreAudio.h
View File

@ -28,6 +28,8 @@
float volume;
AVAudioFormat *_deviceFormat;
AudioDeviceID outputDeviceID;
AudioStreamBasicDescription deviceFormat; // info about the default device

122
Audio/Output/OutputCoreAudio.m
View File

@ -56,8 +56,13 @@ default_device_changed(AudioObjectID inObjectID, UInt32 inNumberAddresses, const
- (void)threadEntry:(id)arg
{
running = YES;
size_t eventCount = 0;
while (!stopping) {
dispatch_semaphore_wait(_sema, DISPATCH_TIME_FOREVER);
if (++eventCount == 128) {
[self updateDeviceFormat];
eventCount = 0;
}
}
stopped = YES;
[self stop];
@ -229,6 +234,69 @@ default_device_changed(AudioObjectID inObjectID, UInt32 inNumberAddresses, const
free(devids);
}
- (BOOL)updateDeviceFormat
{
AVAudioFormat *format = _au.outputBusses[0].format;
if (!_deviceFormat || ![_deviceFormat isEqual:format])
{
NSError *err;
AVAudioFormat *renderFormat;
_deviceFormat = format;
deviceFormat = *(format.streamDescription);
///Seems some 3rd party devices return incorrect stuff...or I just don't like noninterleaved data.
deviceFormat.mFormatFlags &= ~kLinearPCMFormatFlagIsNonInterleaved;
// deviceFormat.mFormatFlags &= ~kLinearPCMFormatFlagIsFloat;
// deviceFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
// We don't want more than 8 channels
if (deviceFormat.mChannelsPerFrame > 8) {
deviceFormat.mChannelsPerFrame = 8;
}
deviceFormat.mBytesPerFrame = deviceFormat.mChannelsPerFrame*(deviceFormat.mBitsPerChannel/8);
deviceFormat.mBytesPerPacket = deviceFormat.mBytesPerFrame * deviceFormat.mFramesPerPacket;
/* Set the channel layout for the audio queue */
AudioChannelLayoutTag tag = 0;
switch (deviceFormat.mChannelsPerFrame) {
case 1:
tag = kAudioChannelLayoutTag_Mono;
break;
case 2:
tag = kAudioChannelLayoutTag_Stereo;
break;
case 3:
tag = kAudioChannelLayoutTag_DVD_4;
break;
case 4:
tag = kAudioChannelLayoutTag_Quadraphonic;
break;
case 5:
tag = kAudioChannelLayoutTag_MPEG_5_0_A;
break;
case 6:
tag = kAudioChannelLayoutTag_MPEG_5_1_A;
break;
case 7:
tag = kAudioChannelLayoutTag_MPEG_6_1_A;
break;
case 8:
tag = kAudioChannelLayoutTag_MPEG_7_1_A;
break;
}
renderFormat = [[AVAudioFormat alloc] initWithStreamDescription:&deviceFormat channelLayout:[[AVAudioChannelLayout alloc] initWithLayoutTag:tag]];
[_au.inputBusses[0] setFormat:renderFormat error:&err];
if (err != nil)
return NO;
[outputController setFormat:&deviceFormat];
}
return YES;
}
- (BOOL)setup
{
if (_au)
@ -239,7 +307,6 @@ default_device_changed(AudioObjectID inObjectID, UInt32 inNumberAddresses, const
stopped = NO;
outputDeviceID = -1;
AVAudioFormat *format, *renderFormat;
AudioComponentDescription desc;
NSError *err;
@ -268,56 +335,9 @@ default_device_changed(AudioObjectID inObjectID, UInt32 inNumberAddresses, const
[self setOutputDeviceWithDeviceDict:nil];
}
format = _au.outputBusses[0].format;
_deviceFormat = nil;
deviceFormat = *(format.streamDescription);
///Seems some 3rd party devices return incorrect stuff...or I just don't like noninterleaved data.
deviceFormat.mFormatFlags &= ~kLinearPCMFormatFlagIsNonInterleaved;
// deviceFormat.mFormatFlags &= ~kLinearPCMFormatFlagIsFloat;
// deviceFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
if (deviceFormat.mChannelsPerFrame > 8) {
deviceFormat.mChannelsPerFrame = 8;
}
// And force a default rate for crappy devices
if (deviceFormat.mSampleRate < 32000)
deviceFormat.mSampleRate = 48000;
deviceFormat.mBytesPerFrame = deviceFormat.mChannelsPerFrame*(deviceFormat.mBitsPerChannel/8);
deviceFormat.mBytesPerPacket = deviceFormat.mBytesPerFrame * deviceFormat.mFramesPerPacket;
/* Set the channel layout for the audio queue */
AudioChannelLayoutTag tag = 0;
switch (deviceFormat.mChannelsPerFrame) {
case 1:
tag = kAudioChannelLayoutTag_Mono;
break;
case 2:
tag = kAudioChannelLayoutTag_Stereo;
break;
case 3:
tag = kAudioChannelLayoutTag_DVD_4;
break;
case 4:
tag = kAudioChannelLayoutTag_Quadraphonic;
break;
case 5:
tag = kAudioChannelLayoutTag_MPEG_5_0_A;
break;
case 6:
tag = kAudioChannelLayoutTag_MPEG_5_1_A;
break;
case 7:
tag = kAudioChannelLayoutTag_MPEG_6_1_A;
break;
case 8:
tag = kAudioChannelLayoutTag_MPEG_7_1_A;
break;
}
renderFormat = [[AVAudioFormat alloc] initWithStreamDescription:&deviceFormat channelLayout:[[AVAudioChannelLayout alloc] initWithLayoutTag:tag]];
[_au.inputBusses[0] setFormat:renderFormat error:&err];
if (err != nil)
return NO;
[self updateDeviceFormat];
__block dispatch_semaphore_t sema = _sema;
__block OutputNode * outputController = self->outputController;
@ -368,8 +388,6 @@ default_device_changed(AudioObjectID inObjectID, UInt32 inNumberAddresses, const
[NSThread detachNewThreadSelector:@selector(threadEntry:) toTarget:self withObject:nil];
[outputController setFormat:&deviceFormat];
return (err == nil);
}