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implement Furnace-style PCM on Arcade/Gen/NES/PCE

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This commit is contained in:
tildearrow 2022-01-20 16:09:05 -05:00
parent 812d0397a8
commit 0f28ae0fee
8 changed files with 132 additions and 39 deletions
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37
src/engine/platform/arcade.cpp
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@ -199,6 +199,16 @@ void DivPlatformArcade::tick() {
chan[i].keyOn=false;
}
}
for (int i=8; i<13; i++) {
if (chan[i].freqChanged) {
chan[i].freq=chan[i].baseFreq+(chan[i].pitch>>1)-64;
if (chan[i].furnacePCM) {
chan[i].pcm.freq=MIN(255,((440.0*pow(2.0,double(chan[i].freq+256)/(64.0*12.0)))*255)/31250);
}
chan[i].freqChanged=false;
}
}
}
void DivPlatformArcade::muteChannel(int ch, bool mute) {
@ -216,18 +226,31 @@ void DivPlatformArcade::muteChannel(int ch, bool mute) {
int DivPlatformArcade::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
if (c.chan>7) {
if (skipRegisterWrites) break;
chan[c.chan].pcm.sample=12*sampleBank+c.value%12;
if (chan[c.chan].pcm.sample>=parent->song.sampleLen) {
chan[c.chan].pcm.sample=-1;
break;
if (ins->type==DIV_INS_AMIGA) {
chan[c.chan].pcm.sample=ins->amiga.initSample;
if (chan[c.chan].pcm.sample<0 || chan[c.chan].pcm.sample>=parent->song.sampleLen) {
chan[c.chan].pcm.sample=-1;
break;
}
chan[c.chan].pcm.pos=0;
chan[c.chan].baseFreq=c.value<<6;
chan[c.chan].freqChanged=true;
chan[c.chan].furnacePCM=true;
} else {
chan[c.chan].pcm.sample=12*sampleBank+c.value%12;
if (chan[c.chan].pcm.sample>=parent->song.sampleLen) {
chan[c.chan].pcm.sample=-1;
break;
}
chan[c.chan].pcm.pos=0;
chan[c.chan].pcm.freq=MIN(255,(parent->song.sample[chan[c.chan].pcm.sample]->rate*255)/31250);
chan[c.chan].furnacePCM=false;
}
chan[c.chan].pcm.pos=0;
chan[c.chan].pcm.freq=MIN(255,(parent->song.sample[chan[c.chan].pcm.sample]->rate*255)/31250);
break;
}
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
for (int i=0; i<4; i++) {
unsigned short baseAddr=chanOffs[c.chan]|opOffs[i];