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Unused alternate blending for stereo

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This commit is contained in:
Kae 2023-07-18 18:18:02 +10:00
parent 6e1d29fe86
commit 770314fd7e
1 changed files with 24 additions and 2 deletions
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26
source/frontend/StarVoice.cpp
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@ -288,9 +288,31 @@ void Voice::mix(int16_t* buffer, size_t frameCount, unsigned channels) {
speakerBuffer[i] = audio->take();
speaker->decibelLevel = getAudioLoudness(speakerBuffer.data(), samples);
auto channelVolumes = speaker->channelVolumes.load();
auto levels = speaker->channelVolumes.load();
for (size_t i = 0; i != samples; ++i)
sharedBuffer[i] += (int32_t)(speakerBuffer[i]) * channelVolumes[i % 2];
sharedBuffer[i] += (int32_t)(speakerBuffer[i]) * levels[i % 2];
//Blends the weaker channel into the stronger one,
/* unused, is a bit too strong on stereo music.
float maxLevel = max(levels[0], levels[1]);
float leftToRight = maxLevel != 0.0f ? 1.0f - (levels[0] / maxLevel) : 0.0f;
float rightToLeft = maxLevel != 0.0f ? 1.0f - (levels[1] / maxLevel) : 0.0f;
int16_t* speakerData = speakerBuffer.data();
int32_t* sharedData = sharedBuffer.data();
for (size_t i = 0; i != frameCount; ++i) {
auto leftSample = (float)*speakerData++;
auto rightSample = (float)*speakerData++;
if (rightToLeft != 0.0f)
leftSample = ( leftSample + rightSample * rightToLeft) / (1.0f + rightToLeft);
if (leftToRight != 0.0f)
rightSample = (rightSample + leftSample * leftToRight) / (1.0f + leftToRight);
*sharedData++ += (int32_t)leftSample * levels[0];
*sharedData++ += (int32_t)rightSample * levels[1];
}
//*/
}
else {
for (size_t i = 0; i != samples; ++i)