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Scale volume in sceP3daBridgeCore and avoid overflow.

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This commit is contained in:
oioitff 2013-06-09 02:27:30 +08:00
parent 883d60fad3
commit bfb66cc2ab
1 changed files with 13 additions and 2 deletions
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15
Core/HLE/sceP3da.cpp
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@ -31,10 +31,20 @@ u32 sceP3daBridgeExit()
return 0;
}
static inline int getScaleValue(u32 channelsNum) {
int val = 0;
while (channelsNum > 1) {
channelsNum >>= 1;
val++;
}
return val;
}
u32 sceP3daBridgeCore(u32 p3daCoreAddr, u32 channelsNum, u32 samplesNum, u32 inputAddr, u32 outputAddr)
{
INFO_LOG(HLE, "sceP3daBridgeCore(%08x, %08x, %08x, %08x, %08x)", p3daCoreAddr, channelsNum, samplesNum, inputAddr, outputAddr);
if (Memory::IsValidAddress(inputAddr) && Memory::IsValidAddress(outputAddr)) {
int scaleval = getScaleValue(channelsNum);
s16* outbuf = (s16*)Memory::GetPointer(outputAddr);
memset(outbuf, 0, samplesNum * sizeof(s16) * 2);
for (u32 k = 0; k < channelsNum; k++) {
@ -43,8 +53,9 @@ u32 sceP3daBridgeCore(u32 p3daCoreAddr, u32 channelsNum, u32 samplesNum, u32 inp
if (!inbuf)
continue;
for (u32 i = 0; i < samplesNum; i++) {
outbuf[i*2] += inbuf[i];
outbuf[i*2 + 1] += inbuf[i];
s16 sample = inbuf[i] >> scaleval;
outbuf[i*2] += sample;
outbuf[i*2 + 1] += sample;
}
}
}