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OPL: YM3812-LLE, part 3

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per-chan osc
This commit is contained in:
tildearrow 2023-11-24 15:16:00 -05:00
parent 817d066a57
commit 8500b1b435
1 changed files with 25 additions and 8 deletions
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33
src/engine/platform/opl.cpp
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@ -505,10 +505,20 @@ void DivPlatformOPL::acquire_ymfm3(short** buf, size_t len) {
}
}
static const int cycleMap[18]={
6, 7, 8, 6, 7, 8, 0, 1, 2,
0, 1, 2, 3, 4, 5, 3, 4, 5,
};
static const int cycleMapDrums[18]={
6, 10, 8, 6, 7, 9, 0, 1, 2,
0, 1, 2, 3, 4, 5, 3, 4, 5,
};
void DivPlatformOPL::acquire_nukedLLE2(short** buf, size_t len) {
int chOut[11];
for (size_t h=0; h<len; h++) {
int curCycle=-9;
int curCycle=0;
unsigned char subCycle=0;
for (int i=0; i<11; i++) {
chOut[i]=0;
@ -561,10 +571,14 @@ void DivPlatformOPL::acquire_nukedLLE2(short** buf, size_t len) {
if (--delay<0) waitingBusy=false;
}
if (curCycle>=0 && curCycle<9) {
// TODO: this
if (!(++subCycle&3)) {
if (properDrums) {
chOut[cycleMapDrums[curCycle]]+=fm_lle2.op_value_debug;
} else {
chOut[cycleMap[curCycle]]+=fm_lle2.op_value_debug;
}
curCycle++;
}
if (!(++subCycle&3)) curCycle++;
if (fm_lle2.o_sy && !lastSY) {
dacVal>>=1;
@ -576,17 +590,20 @@ void DivPlatformOPL::acquire_nukedLLE2(short** buf, size_t len) {
int m=(dacVal>>5)&1023;
m-=512;
dacOut=(m<<e)>>1;
//logV("dacVal: %.8X",dacVal);
//dacVal=0;
//dacVal&=(1U<<18);
break;
}
}
buf[0][h]=dacOut;
//buf[0][h]=((fm_lle2.op_value+0x1000)&0x1fff)-0x1000;
for (int i=0; i<11; i++) {
if (i>=6 && properDrums) {
chOut[i]<<=1;
} else {
chOut[i]<<=2;
}
if (chOut[i]<-32768) chOut[i]=-32768;
if (chOut[i]>32767) chOut[i]=32767;
oscBuf[i]->data[oscBuf[i]->needle++]=chOut[i];
}
}