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Add 7.1 surround sound support to SLAudio

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This commit is contained in:
Cameron Gutman
2020-04-03 19:04:11 -07:00
parent d5a26b1d70
commit 524e92c81a
1 changed files with 15 additions and 15 deletions
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app/streaming/audio/renderers/slaud.cpp
+15 -15
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@@ -42,26 +42,26 @@ bool SLAudioRenderer::prepareForPlayback(const OPUS_MULTISTREAM_CONFIGURATION* o
return true; return true;
} }
#define SWAP_CHANNEL(i, j) \
tmp = opusConfig->mapping[i]; \
opusConfig->mapping[i] = opusConfig->mapping[j]; \
opusConfig->mapping[j] = tmp
void SLAudioRenderer::remapChannels(POPUS_MULTISTREAM_CONFIGURATION opusConfig) { void SLAudioRenderer::remapChannels(POPUS_MULTISTREAM_CONFIGURATION opusConfig) {
unsigned char tmp; OPUS_MULTISTREAM_CONFIGURATION originalConfig = *opusConfig;
if (opusConfig->channelCount == 6) { // The Moonlight's default channel order is FL,FR,C,LFE,RL,RR,SL,SR
// The Moonlight's default channel order is FL,FR,C,LFE,RL,RR // SLAudio expects FL,C,FR,RL,RR,(SL,SR),LFE for 5.1/7.1 so we swap the channels around to match
// SLAudio expects FL,C,FR,RL,RR,LFE so we swap the channels around to match
// Swap FR and C - now FL,C,FR,LFE,RL,RR if (opusConfig->channelCount == 3 || opusConfig->channelCount >= 6) {
SWAP_CHANNEL(1, 2); // Swap FR and C
opusConfig->mapping[1] = originalConfig.mapping[2];
opusConfig->mapping[2] = originalConfig.mapping[1];
}
// Swap LFE and RR - now FL,C,FR,RR,RL,LFE if (opusConfig->channelCount >= 6) {
SWAP_CHANNEL(3, 5); // SLAudio expects the LFE channel at the end
opusConfig->mapping[opusConfig->channelCount - 1] = originalConfig.mapping[3];
// Swap RR and RL - now FL,C,FR,RL,RR,LFE // Slide the other channels down
SWAP_CHANNEL(3, 4); memcpy(&opusConfig->mapping[3],
&originalConfig.mapping[4],
opusConfig->channelCount - 4);
} }
} }