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[HRTF] Force filtering of odd channel formats 

Apparently, Apple's Spatial Audio processor doesn't really support weird
configurations like this. So we need to filter them down to stereo.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
xcode15
Christopher Snowhill 2022-07-09 18:42:03 -07:00
parent 1c6db85555
commit f150065194
1 changed files with 3 additions and 2 deletions
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5
Audio/Output/OutputAVFoundation.m
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@ -600,7 +600,8 @@ current_device_listener(AudioObjectID inObjectID, UInt32 inNumberAddresses, cons
- (void)updateStreamFormat {
/* Set the channel layout for the audio queue */
if(enableHrtf) {
/* Apple's audio processor really only supports common 1-8 channel formats */
if(enableHrtf || realStreamFormat.mChannelsPerFrame > 8 || ((realStreamChannelConfig & ~(AudioConfig6Point1|AudioConfig7Point1)) != 0)) {
NSURL *presetUrl = [[NSBundle mainBundle] URLForResource:@"SADIE_D02-96000" withExtension:@"mhr"];
hrtf = [[HeadphoneFilter alloc] initWithImpulseFile:presetUrl forSampleRate:realStreamFormat.mSampleRate withInputChannels:realStreamFormat.mChannelsPerFrame withConfig:realStreamChannelConfig];
@ -769,7 +770,7 @@ current_device_listener(AudioObjectID inObjectID, UInt32 inNumberAddresses, cons
}
if(samplesRendered) {
if(enableHrtf && hrtf) {
if(hrtf) {
[hrtf process:samplePtr sampleCount:samplesRendered toBuffer:&hrtfBuffer[0]];
samplePtr = &hrtfBuffer[0];
}