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YMU759: ADPCM

This commit is contained in:
tildearrow 2022-05-13 17:22:00 -05:00
parent 7218710268
commit 315018ff24
1 changed files with 10 additions and 5 deletions
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15
src/engine/platform/opl.cpp
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@ -568,6 +568,7 @@ void DivPlatformOPL::tick(bool sysTick) {
}
}
if (chan[adpcmChan].freqChanged) {
printf("freq changed\n");
if (chan[adpcmChan].sample>=0 && chan[adpcmChan].sample<parent->song.sampleLen) {
double off=65535.0*(double)(parent->getSample(chan[adpcmChan].sample)->centerRate)/8363.0;
chan[adpcmChan].freq=parent->calcFreq(chan[adpcmChan].baseFreq,chan[adpcmChan].pitch,false,4,chan[adpcmChan].pitch2,(double)chipClock/144,off);
@ -733,7 +734,7 @@ int DivPlatformOPL::dispatch(DivCommand c) {
int end=s->offB+s->lengthB-1;
immWrite(11,(end>>2)&0xff);
immWrite(12,(end>>10)&0xff);
immWrite(8,(isMuted[c.chan]?0:(chan[c.chan].pan<<6))|2);
immWrite(8,2);
immWrite(7,(s->loopStart>=0)?0xb0:0xa0); // start/repeat
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].note=c.value;
@ -768,10 +769,11 @@ int DivPlatformOPL::dispatch(DivCommand c) {
int end=s->offB+s->lengthB-1;
immWrite(11,(end>>2)&0xff);
immWrite(12,(end>>10)&0xff);
immWrite(8,isMuted[c.chan]?0:(chan[c.chan].pan<<6));
immWrite(7,(s->loopStart>=0)?0x90:0x80); // start/repeat
chan[c.chan].baseFreq=(((unsigned int)s->rate)<<16)/(chipClock/144);
chan[c.chan].freqChanged=true;
immWrite(8,2);
immWrite(7,(s->loopStart>=0)?0xb0:0xa0); // start/repeat
int freq=(65536.0*(double)s->rate)/(double)rate;
immWrite(16,freq&0xff);
immWrite(17,(freq>>8)&0xff);
}
break;
}
@ -947,6 +949,9 @@ int DivPlatformOPL::dispatch(DivCommand c) {
break;
}
case DIV_CMD_PITCH: {
if (c.chan==adpcmChan) {
if (!chan[c.chan].furnacePCM) break;
}
chan[c.chan].pitch=c.value;
chan[c.chan].freqChanged=true;
break;