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Fix a subtle bug in gain smoothing.

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This commit is contained in:
David Reid
2021-04-05 19:34:11 +10:00
parent c300aa9f72
commit 56a5ecbdbd
1 changed files with 5 additions and 1 deletions
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research/miniaudio_engine.h
+5 -1
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@@ -2003,6 +2003,11 @@ MA_API ma_result ma_gainer_process_pcm_frames(ma_gainer* pGainer, void* pFramesO
if (pGainer->t >= pGainer->config.smoothTimeInFrames) { if (pGainer->t >= pGainer->config.smoothTimeInFrames) {
/* Fast path. No gain calculation required. */ /* Fast path. No gain calculation required. */
ma_copy_and_apply_volume_factor_per_channel_f32(pFramesOutF32, pFramesInF32, frameCount, pGainer->config.channels, pGainer->newGains); ma_copy_and_apply_volume_factor_per_channel_f32(pFramesOutF32, pFramesInF32, frameCount, pGainer->config.channels, pGainer->newGains);
/* Now that some frames have been processed we need to make sure future changes to the gain are interpolated. */
if (pGainer->t == (ma_uint32)-1) {
pGainer->t = pGainer->config.smoothTimeInFrames;
}
} else { } else {
/* Slow path. Need to interpolate the gain for each channel individually. */ /* Slow path. Need to interpolate the gain for each channel individually. */
for (iFrame = 0; iFrame < frameCount; iFrame += 1) { for (iFrame = 0; iFrame < frameCount; iFrame += 1) {
@@ -2061,7 +2066,6 @@ MA_API ma_result ma_gainer_set_gains(ma_gainer* pGainer, float* pNewGains)
pGainer->t = 0; pGainer->t = 0;
} }
return MA_SUCCESS; return MA_SUCCESS;
} }