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output/pipewire: set channel positions

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This commit is contained in:
Max Kellermann 2021-07-30 15:45:10 +02:00
parent e55de6e9f0
commit 239698cb5a
1 changed files with 66 additions and 2 deletions
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68
src/output/plugins/PipeWireOutputPlugin.cxx
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@ -213,8 +213,72 @@ ToPipeWireAudioFormat(AudioFormat &audio_format) noexcept
raw.rate = audio_format.sample_rate;
raw.channels = audio_format.channels;
raw.flags |= SPA_AUDIO_FLAG_UNPOSITIONED; // TODO
// TODO raw.position[]
/* MPD uses the FLAC channel assignment
(https://xiph.org/flac/format.html) */
switch (audio_format.channels) {
case 1:
raw.position[0] = SPA_AUDIO_CHANNEL_MONO;
break;
case 2:
raw.position[0] = SPA_AUDIO_CHANNEL_FL;
raw.position[1] = SPA_AUDIO_CHANNEL_FR;
break;
case 3:
raw.position[0] = SPA_AUDIO_CHANNEL_FL;
raw.position[1] = SPA_AUDIO_CHANNEL_FR;
raw.position[2] = SPA_AUDIO_CHANNEL_FC;
break;
case 4:
raw.position[0] = SPA_AUDIO_CHANNEL_FL;
raw.position[1] = SPA_AUDIO_CHANNEL_FR;
raw.position[2] = SPA_AUDIO_CHANNEL_RL;
raw.position[3] = SPA_AUDIO_CHANNEL_RR;
break;
case 5:
raw.position[0] = SPA_AUDIO_CHANNEL_FL;
raw.position[1] = SPA_AUDIO_CHANNEL_FR;
raw.position[2] = SPA_AUDIO_CHANNEL_FC;
raw.position[3] = SPA_AUDIO_CHANNEL_RL;
raw.position[4] = SPA_AUDIO_CHANNEL_RR;
break;
case 6:
raw.position[0] = SPA_AUDIO_CHANNEL_FL;
raw.position[1] = SPA_AUDIO_CHANNEL_FR;
raw.position[2] = SPA_AUDIO_CHANNEL_FC;
raw.position[3] = SPA_AUDIO_CHANNEL_LFE;
raw.position[4] = SPA_AUDIO_CHANNEL_RL;
raw.position[5] = SPA_AUDIO_CHANNEL_RR;
break;
case 7:
raw.position[0] = SPA_AUDIO_CHANNEL_FL;
raw.position[1] = SPA_AUDIO_CHANNEL_FR;
raw.position[2] = SPA_AUDIO_CHANNEL_FC;
raw.position[3] = SPA_AUDIO_CHANNEL_LFE;
raw.position[4] = SPA_AUDIO_CHANNEL_RC;
raw.position[5] = SPA_AUDIO_CHANNEL_SL;
raw.position[6] = SPA_AUDIO_CHANNEL_SR;
break;
case 8:
raw.position[0] = SPA_AUDIO_CHANNEL_FL;
raw.position[1] = SPA_AUDIO_CHANNEL_FR;
raw.position[2] = SPA_AUDIO_CHANNEL_FC;
raw.position[3] = SPA_AUDIO_CHANNEL_LFE;
raw.position[4] = SPA_AUDIO_CHANNEL_RL;
raw.position[5] = SPA_AUDIO_CHANNEL_RR;
raw.position[6] = SPA_AUDIO_CHANNEL_SL;
raw.position[7] = SPA_AUDIO_CHANNEL_SR;
break;
default:
raw.flags |= SPA_AUDIO_FLAG_UNPOSITIONED;
}
return raw;
}