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Audio: Drop the LFE/subwoofer channel from the decoded surround

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DPL2Decode still doesn't decode 5.1 properly, leaving bass in all channels, but its 5.0 is pretty good, so leave it at that.
This commit is contained in:
Adam D. Moss 2015-01-18 23:11:45 +00:00
commit 05d2bf6060
2 changed files with 27 additions and 8 deletions
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8
Source/Core/AudioCommon/OpenALStream.cpp
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@ -251,6 +251,14 @@ void OpenALStream::SoundLoop()
{
float dpl2[OAL_MAX_SAMPLES * OAL_MAX_BUFFERS * SURROUND_CHANNELS];
DPL2Decode(sampleBuffer, nSamples, dpl2);
// zero-out the subwoofer channel - DPL2Decode generates a pretty
// good 5.0 but not a good 5.1 output. Sadly there is not a 5.0
// AL_FORMAT_50CHN32 to make this super-explicit.
// DPL2Decode output: LEFTFRONT, RIGHTFRONT, CENTREFRONT, (sub), LEFTREAR, RIGHTREAR
for (u32 i=0; i < nSamples; ++i)
{
dpl2[i*SURROUND_CHANNELS + 3 /*sub/lfe*/] = 0.0f;
}
alBufferData(uiBufferTemp[iBuffersFilled], AL_FORMAT_51CHN32, dpl2, nSamples * FRAME_SURROUND_FLOAT, ulFrequency);
ALenum err = alGetError();
if (err == AL_INVALID_ENUM)