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SegaPCM: fix loop

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This commit is contained in:
tildearrow 2023-02-24 01:23:46 -05:00
parent f20da3e7e4
commit 7525a07936
2 changed files with 10 additions and 18 deletions
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27
src/engine/platform/segapcm.cpp
View file

@ -136,11 +136,11 @@ void DivPlatformSegaPCM::tick(bool sysTick) {
rWrite(0x86+(i<<3),3+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
rWrite(0x84+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample])&0xff);
rWrite(0x85+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample]>>8)&0xff);
rWrite(6+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-1)>>8));
rWrite(6+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-2)>>8));
if (loopStart<0 || loopStart>=actualLength) {
rWrite(0x86+(i<<3),2+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
} else {
int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart+sampleLoopOff[chan[i].pcm.sample];
int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart;
rWrite(4+(i<<3),loopPos&0xff);
rWrite(5+(i<<3),(loopPos>>8)&0xff);
rWrite(0x86+(i<<3),((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
@ -153,11 +153,11 @@ void DivPlatformSegaPCM::tick(bool sysTick) {
rWrite(0x86+(i<<3),3+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
rWrite(0x84+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample])&0xff);
rWrite(0x85+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample]>>8)&0xff);
rWrite(6+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-1)>>8));
rWrite(6+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-2)>>8));
if (loopStart<0 || loopStart>=actualLength) {
rWrite(0x86+(i<<3),2+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
} else {
int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart+sampleLoopOff[chan[i].pcm.sample];
int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart;
rWrite(4+(i<<3),loopPos&0xff);
rWrite(5+(i<<3),(loopPos>>8)&0xff);
rWrite(0x86+(i<<3),((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
@ -458,27 +458,20 @@ void DivPlatformSegaPCM::reset() {
if ((memPos&0xff0000)!=((memPos+alignedSize)&0xff0000)) {
memPos=(memPos+0xffff)&0xff0000;
}
if (alignedSize&(~0xff)) {
memPos+=256-(alignedSize&0xff);
}
logV("- sample %d will be at %x with length %x",i,memPos,alignedSize);
sampleLoaded[i]=true;
if (memPos>=16777216) break;
sampleOffSegaPCM[i]=memPos;
unsigned int readPos=0;
for (unsigned int j=0; j<alignedSize; j++) {
if (readPos>=(unsigned int)sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)) {
if (sample->isLoopable()) {
readPos=sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
sampleMem[memPos++]=((unsigned char)sample->data8[readPos]+0x80);
} else {
sampleMem[memPos++]=0x80;
}
} else {
sampleMem[memPos++]=((unsigned char)sample->data8[readPos]+0x80);
}
readPos++;
sampleMem[memPos++]=((unsigned char)sample->data8[j]+0x80);
if (memPos>=16777216) break;
}
sampleLoopOff[i]=readPos-sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
if (memPos>=16777216) break;
memPos&=~0xff;
}
sampleMemLen=memPos;
}

1
src/engine/platform/segapcm.h
View file

@ -76,7 +76,6 @@ class DivPlatformSegaPCM: public DivDispatch {
short pendingWrites[256];
unsigned int sampleOffSegaPCM[256];
unsigned int sampleLoopOff[256];
bool sampleLoaded[256];
friend void putDispatchChip(void*,int);