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Experimental optimization to spatialization.

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This commit is contained in:
David Reid
2021-05-22 17:51:33 +10:00
parent 1eaa29f37a
commit 0724a58e12
1 changed files with 25 additions and 0 deletions
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research/miniaudio_engine.h
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@@ -2015,6 +2015,30 @@ MA_API ma_result ma_gainer_process_pcm_frames(ma_gainer* pGainer, void* pFramesO
}
} else {
/* Slow path. Need to interpolate the gain for each channel individually. */
/* We can allow the input and output buffers to be null in which case we'll just update the internal timer. */
if (pFramesOut == NULL || pFramesIn == NULL) {
/* Fast path. Just update the internal timer. */
} else {
/* Slow path. Need to interpolate the gain for each channel individually. */
float a = (float)pGainer->t / pGainer->config.smoothTimeInFrames;
float d = 1.0f / pGainer->config.smoothTimeInFrames;
for (iFrame = 0; iFrame < frameCount; iFrame += 1) {
for (iChannel = 0; iChannel < pGainer->config.channels; iChannel += 1) {
pFramesOutF32[iFrame*pGainer->config.channels + iChannel] = pFramesInF32[iFrame*pGainer->config.channels + iChannel] * ma_mix_f32_fast(pGainer->oldGains[iChannel], pGainer->newGains[iChannel], a);
}
a += d;
if (a > 1) {
a = 1;
}
}
pGainer->t = ma_min(pGainer->t + frameCount, pGainer->config.smoothTimeInFrames);
}
#if 0
for (iFrame = 0; iFrame < frameCount; iFrame += 1) {
/* We can allow the input and output buffers to be null in which case we'll just update the internal timer. */
if (pFramesOut != NULL && pFramesIn != NULL) {
@@ -2026,6 +2050,7 @@ MA_API ma_result ma_gainer_process_pcm_frames(ma_gainer* pGainer, void* pFramesO
/* Move interpolation time forward, but don't go beyond our smoothing time. */
pGainer->t = ma_min(pGainer->t + 1, pGainer->config.smoothTimeInFrames);
}
#endif
}
return MA_SUCCESS;