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Cog Audio: Fix generic upmixer mode 

This resulted in horrible things, the generic N to N upmixer was leaving
unmapped channels as uninitialized memory. This fixes horrible things
happening for people with interfaces with more channels than the source
file, frequently when the source file is stereo, or if the file is mono
and a center channel is present.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
CQTexperiment
Christopher Snowhill 2022-02-09 15:16:19 -08:00
parent e2e83ea760
commit b1a98139cb
1 changed files with 1 additions and 0 deletions
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Audio/Chain/Downmix.m
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@ -295,6 +295,7 @@ static void upmix(const float *inBuffer, int inchannels, uint32_t inconfig, floa
}
for(size_t i = 0; i < count; ++i) {
// upmix N channels to N channels plus silence the empty channels
memset(outBuffer + i * outchannels, 0, sizeof(float) * outchannels);
for(int j = 0; j < inchannels; ++j) {
if(outIndexes[j] != ~0) {
outBuffer[i * outchannels + outIndexes[j]] = inBuffer[i * inchannels + j];