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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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38
src/engine/platform/genesis.cpp
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@ -32,7 +32,7 @@ void DivPlatformGenesis::acquire(short* bufL, short* bufR, size_t start, size_t
dacSample=-1;
}
}
dacPeriod+=dacRate;
dacPeriod+=MAX(40,dacRate);
}
}
@ -102,6 +102,9 @@ void DivPlatformGenesis::tick() {
int freqt=toFreq(chan[i].freq);
immWrite(chanOffs[i]+0xa4,freqt>>8);
immWrite(chanOffs[i]+0xa0,freqt&0xff);
if (chan[i].furnaceDac) {
dacRate=(1280000*1.25)/chan[i].baseFreq;
}
chan[i].freqChanged=false;
}
if (chan[i].keyOn) {
@ -171,20 +174,33 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
}
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
if (c.chan==5 && dacMode) {
if (skipRegisterWrites) break;
dacSample=12*sampleBank+c.value%12;
if (dacSample>=parent->song.sampleLen) {
dacSample=-1;
break;
if (ins->type==DIV_INS_AMIGA) { // Furnace mode
dacSample=ins->amiga.initSample;
if (dacSample<0 || dacSample>=parent->song.sampleLen) {
dacSample=-1;
break;
}
dacPos=0;
dacPeriod=0;
chan[c.chan].baseFreq=644.0f*pow(2.0f,((float)c.value/12.0f));
chan[c.chan].freqChanged=true;
chan[c.chan].furnaceDac=true;
} else { // compatible mode
dacSample=12*sampleBank+c.value%12;
if (dacSample>=parent->song.sampleLen) {
dacSample=-1;
break;
}
dacPos=0;
dacPeriod=0;
dacRate=1280000/parent->song.sample[dacSample]->rate;
chan[c.chan].furnaceDac=false;
}
dacPos=0;
dacPeriod=0;
dacRate=1280000/parent->song.sample[dacSample]->rate;
break;
}
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
}
for (int i=0; i<4; i++) {
unsigned short baseAddr=chanOffs[c.chan]|opOffs[i];