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VGM export: Arcade sample looping

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This commit is contained in:
tildearrow 2022-01-24 17:13:47 -05:00
parent d945e5299a
commit 9d2032d627
6 changed files with 50 additions and 20 deletions
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24
src/engine/platform/arcade.cpp
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@ -77,8 +77,7 @@ void DivPlatformArcade::acquire_nuked(short* bufL, short* bufR, size_t start, si
chan[i].pcm.pos+=chan[i].pcm.freq;
if (chan[i].pcm.pos>=(s->rendLength<<8)) {
if (s->loopStart>=0 && s->loopStart<=(int)s->rendLength) {
// Sega PCM limitation
chan[i].pcm.pos=(s->loopStart&(~0xff))<<8;
chan[i].pcm.pos=s->loopStart<<8;
} else {
chan[i].pcm.sample=-1;
}
@ -143,8 +142,7 @@ void DivPlatformArcade::acquire_ymfm(short* bufL, short* bufR, size_t start, siz
chan[i].pcm.pos+=chan[i].pcm.freq;
if (chan[i].pcm.pos>=(s->rendLength<<8)) {
if (s->loopStart>=0 && s->loopStart<=(int)s->rendLength) {
// Sega PCM limitation
chan[i].pcm.pos=(s->loopStart&(~0xff))<<8;
chan[i].pcm.pos=s->loopStart<<8;
} else {
chan[i].pcm.sample=-1;
}
@ -262,7 +260,14 @@ int DivPlatformArcade::dispatch(DivCommand c) {
addWrite(0x10084+(pcmChan<<3),(s->rendOffP)&0xff);
addWrite(0x10085+(pcmChan<<3),(s->rendOffP>>8)&0xff);
addWrite(0x10006+(pcmChan<<3),MIN(255,((s->rendOffP&0xffff)+s->rendLength)>>8));
addWrite(0x10086+(pcmChan<<3),2+((s->rendOffP>>16)<<3));
if (s->loopStart<0 || s->loopStart>=(int)s->rendLength) {
addWrite(0x10086+(pcmChan<<3),2+((s->rendOffP>>16)<<3));
} else {
int loopPos=(s->rendOffP&0xffff)+s->loopStart+s->loopOffP;
addWrite(0x10004+(pcmChan<<3),loopPos&0xff);
addWrite(0x10005+(pcmChan<<3),(loopPos>>8)&0xff);
addWrite(0x10086+(pcmChan<<3),((s->rendOffP>>16)<<3));
}
}
} else {
chan[c.chan].pcm.sample=12*sampleBank+c.value%12;
@ -282,7 +287,14 @@ int DivPlatformArcade::dispatch(DivCommand c) {
addWrite(0x10084+(pcmChan<<3),(s->rendOffP)&0xff);
addWrite(0x10085+(pcmChan<<3),(s->rendOffP>>8)&0xff);
addWrite(0x10006+(pcmChan<<3),MIN(255,((s->rendOffP&0xffff)+s->rendLength)>>8));
addWrite(0x10086+(pcmChan<<3),2+((s->rendOffP>>16)<<3));
if (s->loopStart<0 || s->loopStart>=(int)s->rendLength) {
addWrite(0x10086+(pcmChan<<3),2+((s->rendOffP>>16)<<3));
} else {
int loopPos=(s->rendOffP&0xffff)+s->loopStart+s->loopOffP;
addWrite(0x10004+(pcmChan<<3),loopPos&0xff);
addWrite(0x10005+(pcmChan<<3),(loopPos>>8)&0xff);
addWrite(0x10086+(pcmChan<<3),((s->rendOffP>>16)<<3));
}
addWrite(0x10007+(pcmChan<<3),chan[c.chan].pcm.freq);
}
}