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Mono reverb support

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gheskett
2021-08-04 01:03:07 -05:00
parent f0353ad30d
commit 8b039b9032
1 changed files with 57 additions and 32 deletions
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89
src/audio/synthesis.c
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@@ -46,10 +46,10 @@ struct VolumeChange {
/* ----------------------------------------------------------REVERB PARAMETERS----------------------------------------------------------------- */
s32 gReverbRevIndex = 0x9A; // Affects decay time mostly; can be messed with at any time (and also probably the most useful parameter here)
s32 gReverbGainIndex = 0xA6; // Affects signal retransmitted back into buffers; can be messed with at any time
s32 gReverbRevIndex = 0x7F; // Affects decay time mostly; can be messed with at any time (and also probably the most useful parameter here)
s32 gReverbGainIndex = 0xA3; // Affects signal retransmitted back into buffers; can be messed with at any time
s32 gReverbWetSignal = 0xF3; // Amount of reverb specific output in final signal; can be messed with at any time
s32 gReverbDrySignal = 0x26; // Amount of original input in final signal (large values can cause terrible feedback!); can be messed with at any time
s32 gReverbDrySignal = 0x00; // Amount of original input in final signal (large values can cause terrible feedback!); can be messed with at any time
// These values affect reverb delays, bigger values result in fatter echo (and more memory); must be cumulatively smaller than BETTER_REVERB_SIZE/8.
// If setting reverb downsample value to 1 (which currently does not work anyway), this must be BETTER_REVERB_SIZE/16.
@@ -340,37 +340,62 @@ void prepare_reverb_ring_buffer(s32 chunkLen, u32 updateIndex) {
#ifdef BETTER_REVERB
else if (consoleBetterReverb) {
item = &gSynthesisReverb.items[gSynthesisReverb.curFrame][updateIndex];
if (gReverbDownsampleRate != 1) {
osInvalDCache(item->toDownsampleLeft, DEFAULT_LEN_2CH);
for (srcPos = 0, dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos; srcPos += gReverbDownsampleRate, dstPos++)
reverb_samples(&gSynthesisReverb.ringBuffer.left[dstPos], &gSynthesisReverb.ringBuffer.right[dstPos], item->toDownsampleLeft[srcPos], item->toDownsampleRight[srcPos]);
for (dstPos = 0; dstPos < item->lengthB / 2; srcPos += gReverbDownsampleRate, dstPos++)
reverb_samples(&gSynthesisReverb.ringBuffer.left[dstPos], &gSynthesisReverb.ringBuffer.right[dstPos], item->toDownsampleLeft[srcPos], item->toDownsampleRight[srcPos]);
// for (srcPos = 0, dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos;
// srcPos += gReverbDownsampleRate, dstPos++) {
// gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(item->toDownsampleLeft[srcPos]);
// gSynthesisReverb.ringBuffer.right[dstPos] = reverb_sample_right(item->toDownsampleRight[srcPos]);
// }
// for (dstPos = 0; dstPos < item->lengthB / 2; srcPos += gReverbDownsampleRate, dstPos++) {
// gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(item->toDownsampleLeft[srcPos]);
// gSynthesisReverb.ringBuffer.right[dstPos] = reverb_sample_right(item->toDownsampleRight[srcPos]);
// }
if (gSoundMode == SOUND_MODE_MONO) {
if (gReverbDownsampleRate != 1) {
osInvalDCache(item->toDownsampleLeft, DEFAULT_LEN_2CH);
for (srcPos = 0, dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos; srcPos += gReverbDownsampleRate, dstPos++) {
gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(((s32) item->toDownsampleLeft[srcPos] + (s32) item->toDownsampleRight[srcPos]) / 2);
gSynthesisReverb.ringBuffer.right[dstPos] = gSynthesisReverb.ringBuffer.left[dstPos];
}
for (dstPos = 0; dstPos < item->lengthB / 2; srcPos += gReverbDownsampleRate, dstPos++) {
gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(((s32) item->toDownsampleLeft[srcPos] + (s32) item->toDownsampleRight[srcPos]) / 2);
gSynthesisReverb.ringBuffer.right[dstPos] = gSynthesisReverb.ringBuffer.left[dstPos];
}
}
else { // Too slow for practical use, not recommended most of the time.
for (dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos; dstPos++) {
gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(((s32) gSynthesisReverb.ringBuffer.left[dstPos] + (s32) gSynthesisReverb.ringBuffer.right[dstPos]) / 2);
gSynthesisReverb.ringBuffer.right[dstPos] = gSynthesisReverb.ringBuffer.left[dstPos];
}
for (dstPos = 0; dstPos < item->lengthB / 2; dstPos++) {
gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(((s32) gSynthesisReverb.ringBuffer.left[dstPos] + (s32) gSynthesisReverb.ringBuffer.right[dstPos]) / 2);
gSynthesisReverb.ringBuffer.right[dstPos] = gSynthesisReverb.ringBuffer.left[dstPos];
}
}
}
else { // Too slow for practical use, not recommended most of the time.
for (dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos; dstPos++)
reverb_samples(&gSynthesisReverb.ringBuffer.left[dstPos], &gSynthesisReverb.ringBuffer.right[dstPos], gSynthesisReverb.ringBuffer.left[dstPos], gSynthesisReverb.ringBuffer.right[dstPos]);
for (dstPos = 0; dstPos < item->lengthB / 2; srcPos += gReverbDownsampleRate, dstPos++)
reverb_samples(&gSynthesisReverb.ringBuffer.left[dstPos], &gSynthesisReverb.ringBuffer.right[dstPos], gSynthesisReverb.ringBuffer.left[dstPos], gSynthesisReverb.ringBuffer.right[dstPos]);
else {
if (gReverbDownsampleRate != 1) {
osInvalDCache(item->toDownsampleLeft, DEFAULT_LEN_2CH);
for (srcPos = 0, dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos; srcPos += gReverbDownsampleRate, dstPos++)
reverb_samples(&gSynthesisReverb.ringBuffer.left[dstPos], &gSynthesisReverb.ringBuffer.right[dstPos], item->toDownsampleLeft[srcPos], item->toDownsampleRight[srcPos]);
for (dstPos = 0; dstPos < item->lengthB / 2; srcPos += gReverbDownsampleRate, dstPos++)
reverb_samples(&gSynthesisReverb.ringBuffer.left[dstPos], &gSynthesisReverb.ringBuffer.right[dstPos], item->toDownsampleLeft[srcPos], item->toDownsampleRight[srcPos]);
// for (dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos; dstPos++) {
// gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(gSynthesisReverb.ringBuffer.left[dstPos]);
// gSynthesisReverb.ringBuffer.right[dstPos] = reverb_sample_right(gSynthesisReverb.ringBuffer.right[dstPos]);
// }
// for (dstPos = 0; dstPos < item->lengthB / 2; srcPos += gReverbDownsampleRate, dstPos++) {
// gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(gSynthesisReverb.ringBuffer.left[dstPos]);
// gSynthesisReverb.ringBuffer.right[dstPos] = reverb_sample_right(gSynthesisReverb.ringBuffer.right[dstPos]);
// }
// for (srcPos = 0, dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos;
// srcPos += gReverbDownsampleRate, dstPos++) {
// gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(item->toDownsampleLeft[srcPos]);
// gSynthesisReverb.ringBuffer.right[dstPos] = reverb_sample_right(item->toDownsampleRight[srcPos]);
// }
// for (dstPos = 0; dstPos < item->lengthB / 2; srcPos += gReverbDownsampleRate, dstPos++) {
// gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(item->toDownsampleLeft[srcPos]);
// gSynthesisReverb.ringBuffer.right[dstPos] = reverb_sample_right(item->toDownsampleRight[srcPos]);
// }
}
else { // Too slow for practical use, not recommended most of the time.
for (dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos; dstPos++)
reverb_samples(&gSynthesisReverb.ringBuffer.left[dstPos], &gSynthesisReverb.ringBuffer.right[dstPos], gSynthesisReverb.ringBuffer.left[dstPos], gSynthesisReverb.ringBuffer.right[dstPos]);
for (dstPos = 0; dstPos < item->lengthB / 2; dstPos++)
reverb_samples(&gSynthesisReverb.ringBuffer.left[dstPos], &gSynthesisReverb.ringBuffer.right[dstPos], gSynthesisReverb.ringBuffer.left[dstPos], gSynthesisReverb.ringBuffer.right[dstPos]);
// for (dstPos = item->startPos; dstPos < item->lengthA / 2 + item->startPos; dstPos++) {
// gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(gSynthesisReverb.ringBuffer.left[dstPos]);
// gSynthesisReverb.ringBuffer.right[dstPos] = reverb_sample_right(gSynthesisReverb.ringBuffer.right[dstPos]);
// }
// for (dstPos = 0; dstPos < item->lengthB / 2; srcPos += gReverbDownsampleRate, dstPos++) {
// gSynthesisReverb.ringBuffer.left[dstPos] = reverb_sample_left(gSynthesisReverb.ringBuffer.left[dstPos]);
// gSynthesisReverb.ringBuffer.right[dstPos] = reverb_sample_right(gSynthesisReverb.ringBuffer.right[dstPos]);
// }
}
}
}
#endif