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latency fix

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This commit is contained in:
tildearrow 2022-09-23 19:01:01 -05:00
parent 5e2cefff94
commit e6fc9e09d2
4 changed files with 140 additions and 138 deletions
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92
src/engine/platform/ym2610.cpp
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@ -294,15 +294,7 @@ void DivPlatformYM2610::acquire(short* bufL, short* bufR, size_t start, size_t l
}
}
void DivPlatformYM2610::tick(bool sysTick) {
// PSG
ay->tick(sysTick);
ay->flushWrites();
for (DivRegWrite& i: ay->getRegisterWrites()) {
immWrite(i.addr&15,i.val);
}
ay->getRegisterWrites().clear();
void DivPlatformYM2610::tick(bool sysTick) {
// FM
for (int i=0; i<psgChanOffs; i++) {
if (i==1 && extMode) continue;
@ -460,6 +452,43 @@ void DivPlatformYM2610::tick(bool sysTick) {
}
}
for (int i=16; i<512; i++) {
if (pendingWrites[i]!=oldWrites[i]) {
immWrite(i,pendingWrites[i]&0xff);
oldWrites[i]=pendingWrites[i];
}
}
for (int i=0; i<psgChanOffs; i++) {
if (i==1 && extMode) continue;
if (chan[i].freqChanged) {
if (parent->song.linearPitch==2) {
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,4,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
} else {
int fNum=parent->calcFreq(chan[i].baseFreq&0x7ff,chan[i].pitch,false,4,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
int block=(chan[i].baseFreq&0xf800)>>11;
if (fNum<0) fNum=0;
if (fNum>2047) {
while (block<7) {
fNum>>=1;
block++;
}
if (fNum>2047) fNum=2047;
}
chan[i].freq=(block<<11)|fNum;
}
if (chan[i].freq>0x3fff) chan[i].freq=0x3fff;
immWrite(chanOffs[i]+ADDR_FREQH,chan[i].freq>>8);
immWrite(chanOffs[i]+ADDR_FREQ,chan[i].freq&0xff);
chan[i].freqChanged=false;
}
if (chan[i].keyOn || chan[i].opMaskChanged) {
immWrite(0x28,(chan[i].opMask<<4)|konOffs[i]);
chan[i].opMaskChanged=false;
chan[i].keyOn=false;
}
}
// ADPCM-A
for (int i=adpcmAChanOffs; i<adpcmBChanOffs; i++) {
if (chan[i].furnacePCM) {
@ -555,47 +584,18 @@ void DivPlatformYM2610::tick(bool sysTick) {
writeADPCMAOff=0;
}
for (int i=16; i<512; i++) {
if (pendingWrites[i]!=oldWrites[i]) {
immWrite(i,pendingWrites[i]&0xff);
oldWrites[i]=pendingWrites[i];
}
}
for (int i=0; i<psgChanOffs; i++) {
if (i==1 && extMode) continue;
if (chan[i].freqChanged) {
if (parent->song.linearPitch==2) {
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,4,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
} else {
int fNum=parent->calcFreq(chan[i].baseFreq&0x7ff,chan[i].pitch,false,4,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
int block=(chan[i].baseFreq&0xf800)>>11;
if (fNum<0) fNum=0;
if (fNum>2047) {
while (block<7) {
fNum>>=1;
block++;
}
if (fNum>2047) fNum=2047;
}
chan[i].freq=(block<<11)|fNum;
}
if (chan[i].freq>0x3fff) chan[i].freq=0x3fff;
immWrite(chanOffs[i]+ADDR_FREQH,chan[i].freq>>8);
immWrite(chanOffs[i]+ADDR_FREQ,chan[i].freq&0xff);
chan[i].freqChanged=false;
}
if (chan[i].keyOn || chan[i].opMaskChanged) {
immWrite(0x28,(chan[i].opMask<<4)|konOffs[i]);
chan[i].opMaskChanged=false;
chan[i].keyOn=false;
}
}
if (writeADPCMAOn) {
immWrite(0x100,writeADPCMAOn);
writeADPCMAOn=0;
}
// PSG
ay->tick(sysTick);
ay->flushWrites();
for (DivRegWrite& i: ay->getRegisterWrites()) {
immWrite(i.addr&15,i.val);
}
ay->getRegisterWrites().clear();
}
int DivPlatformYM2610::dispatch(DivCommand c) {