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This commit is contained in:
tildearrow 2022-09-23 20:15:20 -05:00
parent e82374fcde
commit b72b5bf0e6
4 changed files with 133 additions and 57 deletions
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92
src/engine/platform/ay.cpp
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@ -81,16 +81,39 @@ const char** DivPlatformAY8910::getRegisterSheet() {
return intellivision?regCheatSheetAY8914:regCheatSheetAY;
}
void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t len) {
if (ayBufLen<len) {
ayBufLen=len;
for (int i=0; i<3; i++) {
delete[] ayBuf[i];
ayBuf[i]=new short[ayBufLen];
}
/* C program to generate this table:
#include <stdio.h>
#include <math.h>
int main(int argc, char** argv) {
for (int i=0; i<256; i++) {
if ((i&15)==0) printf("\n ");
printf(" %d,",(int)round(pow((double)i/255.0,0.36)*15.0));
}
// TODO: try to fit this into the actual loop
// PCM part
}
*/
const unsigned char dacLogTableAY[256]={
0, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10,
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11,
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12,
12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13,
13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14,
14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15
};
void DivPlatformAY8910::runDAC() {
for (int i=0; i<3; i++) {
if (chan[i].psgMode.dac && chan[i].dac.sample!=-1) {
chan[i].dac.period+=chan[i].dac.rate;
@ -105,9 +128,8 @@ void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t l
end=true;
break;
}
// Partially
unsigned char dacData=(((unsigned char)s->data8[chan[i].dac.pos]^0x80)>>4);
chan[i].dac.out=MAX(0,MIN(15,(dacData*chan[i].outVol)/15));
unsigned char dacData=dacLogTableAY[(unsigned char)s->data8[chan[i].dac.pos]^0x80];
chan[i].dac.out=MAX(0,dacData-(15-chan[i].outVol));
if (prevOut!=chan[i].dac.out) {
prevOut=chan[i].dac.out;
changed=true;
@ -130,7 +152,9 @@ void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t l
}
}
}
}
void DivPlatformAY8910::checkWrites() {
while (!writes.empty()) {
QueuedWrite w=writes.front();
if (intellivision) {
@ -143,8 +167,22 @@ void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t l
regPool[w.addr&0x0f]=w.val;
writes.pop();
}
}
void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t len) {
if (ayBufLen<len) {
ayBufLen=len;
for (int i=0; i<3; i++) {
delete[] ayBuf[i];
ayBuf[i]=new short[ayBufLen];
}
}
if (sunsoft) {
for (size_t i=0; i<len; i++) {
runDAC();
checkWrites();
ay->sound_stream_update(ayBuf,1);
bufL[i+start]=ayBuf[0][0];
bufR[i+start]=bufL[i+start];
@ -154,22 +192,22 @@ void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t l
oscBuf[2]->data[oscBuf[2]->needle++]=sunsoftVolTable[31-((ay->lastIndx>>10)&31)]>>3;
}
} else {
ay->sound_stream_update(ayBuf,len);
if (stereo) {
for (size_t i=0; i<len; i++) {
bufL[i+start]=ayBuf[0][i]+ayBuf[1][i]+((ayBuf[2][i]*stereoSep)>>8);
bufR[i+start]=((ayBuf[0][i]*stereoSep)>>8)+ayBuf[1][i]+ayBuf[2][i];
}
} else {
for (size_t i=0; i<len; i++) {
bufL[i+start]=ayBuf[0][i]+ayBuf[1][i]+ayBuf[2][i];
for (size_t i=0; i<len; i++) {
runDAC();
checkWrites();
ay->sound_stream_update(ayBuf,1);
if (stereo) {
bufL[i+start]=ayBuf[0][0]+ayBuf[1][0]+((ayBuf[2][0]*stereoSep)>>8);
bufR[i+start]=((ayBuf[0][0]*stereoSep)>>8)+ayBuf[1][0]+ayBuf[2][0];
} else {
bufL[i+start]=ayBuf[0][0]+ayBuf[1][0]+ayBuf[2][0];
bufR[i+start]=bufL[i+start];
}
}
for (int ch=0; ch<3; ch++) {
for (size_t i=0; i<len; i++) {
oscBuf[ch]->data[oscBuf[ch]->needle++]=ayBuf[ch][i]<<2;
}
oscBuf[0]->data[oscBuf[0]->needle++]=ayBuf[0][0]<<2;
oscBuf[1]->data[oscBuf[1]->needle++]=ayBuf[1][0]<<2;
oscBuf[2]->data[oscBuf[2]->needle++]=ayBuf[2][0]<<2;
}
}
}
@ -291,7 +329,7 @@ void DivPlatformAY8910::tick(bool sysTick) {
off=8363.0/(double)s->centerRate;
}
}
chan[i].dac.rate=((double)chipClock*4096.0)/(double)(MAX(1,off*chan[i].freq));
chan[i].dac.rate=((double)rate*16.0)/(double)(MAX(1,off*chan[i].freq));
if (dumpWrites) addWrite(0xffff0001+(i<<8),chan[i].dac.rate);
}
if (chan[i].freq>4095) chan[i].freq=4095;