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Fixed surround sound support on Apple TV

This commit is contained in:
Sam Lantinga 2020-02-24 10:25:57 -08:00
parent f485766005
commit 2c9871a4a8
1 changed files with 43 additions and 1 deletions
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44
src/audio/coreaudio/SDL_coreaudio.m
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@ -710,6 +710,41 @@ prepare_audioqueue(_THIS)
/* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(&this->spec);
/* Set the channel layout for the audio queue */
AudioChannelLayout layout;
SDL_zero(layout);
switch (this->spec.channels) {
case 1:
layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
break;
case 2:
layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
break;
case 3:
layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4;
break;
case 4:
layout.mChannelLayoutTag = kAudioChannelLayoutTag_Quadraphonic;
break;
case 5:
layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_5_0_A;
break;
case 6:
layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_5_1_A;
break;
case 7:
/* FIXME: Need to move channel[4] (BC) to channel[6] */
layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A;
break;
case 8:
layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A;
break;
}
if (layout.mChannelLayoutTag != 0) {
result = AudioQueueSetProperty(this->hidden->audioQueue, kAudioQueueProperty_ChannelLayout, &layout, sizeof(layout));
CHECK_RESULT("AudioQueueSetProperty(kAudioQueueProperty_ChannelLayout)");
}
/* Allocate a sample buffer */
this->hidden->bufferSize = this->spec.size;
this->hidden->bufferOffset = iscapture ? 0 : this->hidden->bufferSize;
@ -820,6 +855,13 @@ COREAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
AVAudioSession* session = [AVAudioSession sharedInstance];
[session setPreferredSampleRate:this->spec.freq error:nil];
this->spec.freq = (int)session.sampleRate;
if (iscapture) {
[session setPreferredInputNumberOfChannels:this->spec.channels error:nil];
this->spec.channels = session.preferredInputNumberOfChannels;
} else {
[session setPreferredOutputNumberOfChannels:this->spec.channels error:nil];
this->spec.channels = session.preferredOutputNumberOfChannels;
}
}
#endif
@ -864,7 +906,7 @@ COREAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
return SDL_SetError("Unsupported audio format");
}
strdesc->mBytesPerFrame = strdesc->mBitsPerChannel * strdesc->mChannelsPerFrame / 8;
strdesc->mBytesPerFrame = strdesc->mChannelsPerFrame * strdesc->mBitsPerChannel / 8;
strdesc->mBytesPerPacket = strdesc->mBytesPerFrame * strdesc->mFramesPerPacket;
#if MACOSX_COREAUDIO