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Organize mem access a bit in SasInstance::Mix().

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It's a bit faster but this isn't really the hottest part...
This commit is contained in:
Unknown W. Brackets 2013-03-16 11:36:56 -07:00
parent b1e9924075
commit c20251ab30
1 changed files with 18 additions and 16 deletions
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34
Core/HW/SasAudio.cpp
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@ -257,6 +257,14 @@ void SasInstance::SetGrainSize(int newGrainSize) {
resampleBuffer = new s16[grainSize * 4 + 2];
}
static inline s16 clamp_s16(int i) {
if (i > 32767)
return 32767;
if (i < -32768)
return -32768;
return i;
}
void SasInstance::Mix(u32 outAddr) {
int voicesPlayingCount = 0;
for (int v = 0; v < PSP_SAS_VOICES_MAX; v++) {
@ -371,23 +379,17 @@ void SasInstance::Mix(u32 outAddr) {
// TODO
// Alright, all voices mixed. Let's convert and clip, and at the same time, wipe mixBuffer for next time. Could also dither.
for (int i = 0; i < grainSize; i++) {
int sampleL = mixBuffer[i * 2] + sendBuffer[i * 2];
int sampleR = mixBuffer[i * 2 + 1] + sendBuffer[i * 2 + 1];
mixBuffer[i * 2] = 0;
mixBuffer[i * 2 + 1] = 0;
sendBuffer[i * 2] = 0;
sendBuffer[i * 2 + 1] = 0;
s16 outL, outR;
if (sampleL > 32767) outL = 32767;
else if (sampleL < -32768) outL = -32768;
else outL = sampleL;
if (sampleR > 32767) outR = 32767;
else if (sampleR < -32768) outR = -32768;
else outR = sampleR;
Memory::WriteUnchecked_U16(outL, outAddr + i * 2 * 2);
Memory::WriteUnchecked_U16(outR, outAddr + i * 2 * 2 + 2);
s16 *outp = (s16 *)Memory::GetPointer(outAddr);
for (int i = 0; i < grainSize * 2; i += 2) {
int sampleL = mixBuffer[i] + sendBuffer[i];
*outp++ = clamp_s16(sampleL);
int sampleR = mixBuffer[i + 1] + sendBuffer[i + 1];
*outp++ = clamp_s16(sampleR);
}
memset(mixBuffer, 0, grainSize * sizeof(int) * 2);
memset(sendBuffer, 0, grainSize * sizeof(int) * 2);
#ifdef AUDIO_TO_FILE
fwrite(Memory::GetPointer(outAddr), 1, grainSize * 2 * 2, audioDump);
#endif