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furnace/src/engine/platform/arcade.cpp
tildearrow 9d2032d627 VGM export: Arcade sample looping
2022-01-24 17:13:47 -05:00

626 lines
18 KiB
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#include "arcade.h"
#include "../engine.h"
#include <string.h>
#include <math.h>
static unsigned short chanOffs[8]={
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07
};
static unsigned short opOffs[4]={
0x00, 0x08, 0x10, 0x18
};
static bool isOutput[8][4]={
// 1 3 2 4
{false,false,false,true},
{false,false,false,true},
{false,false,false,true},
{false,false,false,true},
{false,false,true ,true},
{false,true ,true ,true},
{false,true ,true ,true},
{true ,true ,true ,true},
};
static unsigned char dtTable[8]={
7,6,5,0,1,2,3,0
};
static int orderedOps[4]={
0,2,1,3
};
#define rWrite(a,v) if (!skipRegisterWrites) {pendingWrites[a]=v;}
#define immWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
void DivPlatformArcade::acquire_nuked(short* bufL, short* bufR, size_t start, size_t len) {
static int o[2];
for (size_t h=start; h<start+len; h++) {
if (!writes.empty() && !fm.write_busy) {
QueuedWrite& w=writes.front();
if (w.addrOrVal) {
OPM_Write(&fm,1,w.val);
//printf("write: %x = %.2x\n",w.addr,w.val);
writes.pop();
} else {
OPM_Write(&fm,0,w.addr);
w.addrOrVal=true;
}
}
OPM_Clock(&fm,NULL,NULL,NULL,NULL);
OPM_Clock(&fm,NULL,NULL,NULL,NULL);
OPM_Clock(&fm,NULL,NULL,NULL,NULL);
OPM_Clock(&fm,o,NULL,NULL,NULL);
pcmCycles+=31250;
if (pcmCycles>=rate) {
pcmCycles-=rate;
// do a PCM cycle
pcmL=0; pcmR=0;
for (int i=8; i<13; i++) {
if (chan[i].pcm.sample>=0) {
DivSample* s=parent->song.sample[chan[i].pcm.sample];
if (s->rendLength<=0) {
chan[i].pcm.sample=-1;
continue;
}
if (!isMuted[i]) {
if (s->depth==8) {
pcmL+=(s->rendData[chan[i].pcm.pos>>8]*chan[i].chVolL);
pcmR+=(s->rendData[chan[i].pcm.pos>>8]*chan[i].chVolR);
} else {
pcmL+=(s->rendData[chan[i].pcm.pos>>8]*chan[i].chVolL)>>8;
pcmR+=(s->rendData[chan[i].pcm.pos>>8]*chan[i].chVolR)>>8;
}
}
chan[i].pcm.pos+=chan[i].pcm.freq;
if (chan[i].pcm.pos>=(s->rendLength<<8)) {
if (s->loopStart>=0 && s->loopStart<=(int)s->rendLength) {
chan[i].pcm.pos=s->loopStart<<8;
} else {
chan[i].pcm.sample=-1;
}
}
}
}
}
o[0]+=pcmL;
o[1]+=pcmR;
if (o[0]<-32768) o[0]=-32768;
if (o[0]>32767) o[0]=32767;
if (o[1]<-32768) o[1]=-32768;
if (o[1]>32767) o[1]=32767;
bufL[h]=o[0];
bufR[h]=o[1];
}
}
void DivPlatformArcade::acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len) {
static int os[2];
for (size_t h=start; h<start+len; h++) {
os[0]=0; os[1]=0;
if (!writes.empty()) {
if (--delay<1) {
QueuedWrite& w=writes.front();
fm_ymfm->write(0x0+((w.addr>>8)<<1),w.addr);
fm_ymfm->write(0x1+((w.addr>>8)<<1),w.val);
writes.pop();
delay=1;
}
}
fm_ymfm->generate(&out_ymfm);
pcmCycles+=31250;
if (pcmCycles>=rate) {
pcmCycles-=rate;
// do a PCM cycle
pcmL=0; pcmR=0;
for (int i=8; i<13; i++) {
if (chan[i].pcm.sample>=0 && chan[i].pcm.sample<parent->song.sampleLen) {
DivSample* s=parent->song.sample[chan[i].pcm.sample];
if (s->rendLength<=0) {
chan[i].pcm.sample=-1;
continue;
}
if (!isMuted[i]) {
if (s->depth==8) {
pcmL+=(s->rendData[chan[i].pcm.pos>>8]*chan[i].chVolL);
pcmR+=(s->rendData[chan[i].pcm.pos>>8]*chan[i].chVolR);
} else {
pcmL+=(s->rendData[chan[i].pcm.pos>>8]*chan[i].chVolL)>>8;
pcmR+=(s->rendData[chan[i].pcm.pos>>8]*chan[i].chVolR)>>8;
}
}
chan[i].pcm.pos+=chan[i].pcm.freq;
if (chan[i].pcm.pos>=(s->rendLength<<8)) {
if (s->loopStart>=0 && s->loopStart<=(int)s->rendLength) {
chan[i].pcm.pos=s->loopStart<<8;
} else {
chan[i].pcm.sample=-1;
}
}
}
}
}
os[0]=out_ymfm.data[0]+pcmL;
if (os[0]<-32768) os[0]=-32768;
if (os[0]>32767) os[0]=32767;
os[1]=out_ymfm.data[1]+pcmR;
if (os[1]<-32768) os[1]=-32768;
if (os[1]>32767) os[1]=32767;
bufL[h]=os[0];
bufR[h]=os[1];
}
}
void DivPlatformArcade::acquire(short* bufL, short* bufR, size_t start, size_t len) {
if (useYMFM) {
acquire_ymfm(bufL,bufR,start,len);
} else {
acquire_nuked(bufL,bufR,start,len);
}
}
unsigned char noteMap[12]={
0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14
};
int hScale(int note) {
return ((note/12)<<4)+(noteMap[note%12]);
}
void DivPlatformArcade::tick() {
for (int i=0; i<8; i++) {
if (chan[i].keyOn || chan[i].keyOff) {
immWrite(0x08,i);
chan[i].keyOff=false;
}
}
for (int i=0; i<256; i++) {
if (pendingWrites[i]!=oldWrites[i]) {
immWrite(i,pendingWrites[i]&0xff);
oldWrites[i]=pendingWrites[i];
}
}
for (int i=0; i<8; i++) {
if (chan[i].freqChanged) {
chan[i].freq=chan[i].baseFreq+(chan[i].pitch>>1)-64;
immWrite(i+0x28,hScale(chan[i].freq>>6));
immWrite(i+0x30,chan[i].freq<<2);
chan[i].freqChanged=false;
}
if (chan[i].keyOn) {
immWrite(0x08,0x78|i);
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);
if (dumpWrites && i>=8) {
addWrite(0x10007+((i-8)<<3),chan[i].pcm.freq);
}
}
chan[i].freqChanged=false;
}
}
}
void DivPlatformArcade::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
if (ch<8) {
DivInstrument* ins=parent->getIns(chan[ch].ins);
if (isMuted[ch]) {
rWrite(chanOffs[ch]+0x20,(ins->fm.alg&7)|(ins->fm.fb<<3));
} else {
rWrite(chanOffs[ch]+0x20,(ins->fm.alg&7)|(ins->fm.fb<<3)|((chan[ch].chVolL&1)<<6)|((chan[ch].chVolR&1)<<7));
}
}
}
int DivPlatformArcade::dispatch(DivCommand c) {
int pcmChan=c.chan-8;
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
if (c.chan>7) {
if (skipRegisterWrites) 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;
if (dumpWrites) {
addWrite(0x10086+(pcmChan<<3),3);
}
break;
}
chan[c.chan].pcm.pos=0;
chan[c.chan].baseFreq=c.value<<6;
chan[c.chan].freqChanged=true;
chan[c.chan].furnacePCM=true;
if (dumpWrites) { // Sega PCM writes
DivSample* s=parent->song.sample[chan[c.chan].pcm.sample];
addWrite(0x10086+(pcmChan<<3),3+((s->rendOffP>>16)<<3));
addWrite(0x10084+(pcmChan<<3),(s->rendOffP)&0xff);
addWrite(0x10085+(pcmChan<<3),(s->rendOffP>>8)&0xff);
addWrite(0x10006+(pcmChan<<3),MIN(255,((s->rendOffP&0xffff)+s->rendLength)>>8));
if (s->loopStart<0 || s->loopStart>=(int)s->rendLength) {
addWrite(0x10086+(pcmChan<<3),2+((s->rendOffP>>16)<<3));
} else {
int loopPos=(s->rendOffP&0xffff)+s->loopStart+s->loopOffP;
addWrite(0x10004+(pcmChan<<3),loopPos&0xff);
addWrite(0x10005+(pcmChan<<3),(loopPos>>8)&0xff);
addWrite(0x10086+(pcmChan<<3),((s->rendOffP>>16)<<3));
}
}
} 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;
if (dumpWrites) {
addWrite(0x10086+(pcmChan<<3),3);
}
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;
if (dumpWrites) { // Sega PCM writes
DivSample* s=parent->song.sample[chan[c.chan].pcm.sample];
addWrite(0x10086+(pcmChan<<3),3+((s->rendOffP>>16)<<3));
addWrite(0x10084+(pcmChan<<3),(s->rendOffP)&0xff);
addWrite(0x10085+(pcmChan<<3),(s->rendOffP>>8)&0xff);
addWrite(0x10006+(pcmChan<<3),MIN(255,((s->rendOffP&0xffff)+s->rendLength)>>8));
if (s->loopStart<0 || s->loopStart>=(int)s->rendLength) {
addWrite(0x10086+(pcmChan<<3),2+((s->rendOffP>>16)<<3));
} else {
int loopPos=(s->rendOffP&0xffff)+s->loopStart+s->loopOffP;
addWrite(0x10004+(pcmChan<<3),loopPos&0xff);
addWrite(0x10005+(pcmChan<<3),(loopPos>>8)&0xff);
addWrite(0x10086+(pcmChan<<3),((s->rendOffP>>16)<<3));
}
addWrite(0x10007+(pcmChan<<3),chan[c.chan].pcm.freq);
}
}
break;
}
for (int i=0; i<4; i++) {
unsigned short baseAddr=chanOffs[c.chan]|opOffs[i];
DivInstrumentFM::Operator op=ins->fm.op[i];
if (isOutput[ins->fm.alg][i]) {
if (!chan[c.chan].active || chan[c.chan].insChanged) {
rWrite(baseAddr+0x60,127-(((127-op.tl)*(chan[c.chan].vol&0x7f))/127));
}
} else {
if (chan[c.chan].insChanged) {
rWrite(baseAddr+0x60,op.tl);
}
}
if (chan[c.chan].insChanged) {
rWrite(baseAddr+0x40,(op.mult&15)|(dtTable[op.dt&7]<<4));
rWrite(baseAddr+0x80,(op.ar&31)|(op.rs<<6));
rWrite(baseAddr+0xa0,(op.dr&31)|(op.am<<7));
rWrite(baseAddr+0xc0,(op.d2r&31)|(op.dt2<<6));
rWrite(baseAddr+0xe0,(op.rr&15)|(op.sl<<4));
}
}
if (chan[c.chan].insChanged) {
if (isMuted[c.chan]) {
rWrite(chanOffs[c.chan]+0x20,(ins->fm.alg&7)|(ins->fm.fb<<3));
} else {
rWrite(chanOffs[c.chan]+0x20,(ins->fm.alg&7)|(ins->fm.fb<<3)|((chan[c.chan].chVolL&1)<<6)|((chan[c.chan].chVolR&1)<<7));
}
rWrite(chanOffs[c.chan]+0x38,((ins->fm.fms&7)<<4)|(ins->fm.ams&3));
}
chan[c.chan].insChanged=false;
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=c.value<<6;
chan[c.chan].freqChanged=true;
}
chan[c.chan].keyOn=true;
chan[c.chan].active=true;
break;
}
case DIV_CMD_NOTE_OFF:
if (c.chan>7) {
chan[c.chan].pcm.sample=-1;
if (dumpWrites) {
addWrite(0x10086+(pcmChan<<3),3);
}
}
chan[c.chan].keyOff=true;
chan[c.chan].active=false;
break;
case DIV_CMD_VOLUME: {
chan[c.chan].vol=c.value;
if (c.chan>7) {
chan[c.chan].chVolL=c.value;
chan[c.chan].chVolR=c.value;
if (dumpWrites) {
addWrite(0x10002+(pcmChan<<3),chan[c.chan].chVolL);
addWrite(0x10003+(pcmChan<<3),chan[c.chan].chVolR);
}
break;
}
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
for (int i=0; i<4; i++) {
unsigned short baseAddr=chanOffs[c.chan]|opOffs[i];
DivInstrumentFM::Operator op=ins->fm.op[i];
if (isOutput[ins->fm.alg][i]) {
rWrite(baseAddr+0x60,127-(((127-op.tl)*(chan[c.chan].vol&0x7f))/127));
} else {
rWrite(baseAddr+0x60,op.tl);
}
}
break;
}
case DIV_CMD_GET_VOLUME: {
return chan[c.chan].vol;
break;
}
case DIV_CMD_INSTRUMENT:
if (chan[c.chan].ins!=c.value || c.value2==1) {
chan[c.chan].insChanged=true;
}
chan[c.chan].ins=c.value;
break;
case DIV_CMD_PANNING: {
// TODO
if (c.chan>7) {
chan[c.chan].chVolL=(c.value>>4)|(((c.value>>4)>>1)<<4);
chan[c.chan].chVolR=(c.value&15)|(((c.value&15)>>1)<<4);
if (dumpWrites) {
addWrite(0x10002+(pcmChan<<3),chan[c.chan].chVolL);
addWrite(0x10003+(pcmChan<<3),chan[c.chan].chVolR);
}
} else {
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
chan[c.chan].chVolL=((c.value>>4)==1);
chan[c.chan].chVolR=((c.value&15)==1);
if (isMuted[c.chan]) {
rWrite(chanOffs[c.chan]+0x20,(ins->fm.alg&7)|(ins->fm.fb<<3));
} else {
rWrite(chanOffs[c.chan]+0x20,(ins->fm.alg&7)|(ins->fm.fb<<3)|((chan[c.chan].chVolL&1)<<6)|((chan[c.chan].chVolR&1)<<7));
}
}
break;
}
case DIV_CMD_PITCH: {
chan[c.chan].pitch=c.value;
chan[c.chan].freqChanged=true;
break;
}
case DIV_CMD_NOTE_PORTA: {
int destFreq=c.value2<<6;
int newFreq;
bool return2=false;
if (destFreq>chan[c.chan].baseFreq) {
newFreq=chan[c.chan].baseFreq+c.value;
if (newFreq>=destFreq) {
newFreq=destFreq;
return2=true;
}
} else {
newFreq=chan[c.chan].baseFreq-c.value;
if (newFreq<=destFreq) {
newFreq=destFreq;
return2=true;
}
}
chan[c.chan].baseFreq=newFreq;
chan[c.chan].freqChanged=true;
if (return2) return 2;
break;
}
case DIV_CMD_LEGATO: {
chan[c.chan].baseFreq=c.value<<6;
chan[c.chan].freqChanged=true;
break;
}
case DIV_CMD_FM_LFO: {
if (c.chan>7) break;
rWrite(0x18,c.value);
break;
}
case DIV_CMD_FM_LFO_WAVE: {
if (c.chan>7) break;
rWrite(0x1b,c.value&3);
break;
}
case DIV_CMD_FM_MULT: {
if (c.chan>7) break;
unsigned short baseAddr=chanOffs[c.chan]|opOffs[orderedOps[c.value]];
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
DivInstrumentFM::Operator op=ins->fm.op[orderedOps[c.value]];
rWrite(baseAddr+0x40,(c.value2&15)|(dtTable[op.dt&7]<<4));
break;
}
case DIV_CMD_FM_TL: {
if (c.chan>7) break;
unsigned short baseAddr=chanOffs[c.chan]|opOffs[orderedOps[c.value]];
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
if (isOutput[ins->fm.alg][c.value]) {
rWrite(baseAddr+0x60,127-(((127-c.value2)*(chan[c.chan].vol&0x7f))/127));
} else {
rWrite(baseAddr+0x60,c.value2);
}
break;
}
case DIV_CMD_FM_AR: {
if (c.chan>7) break;
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
if (c.value<0) {
for (int i=0; i<4; i++) {
DivInstrumentFM::Operator op=ins->fm.op[i];
unsigned short baseAddr=chanOffs[c.chan]|opOffs[i];
rWrite(baseAddr+0x80,(c.value2&31)|(op.rs<<6));
}
} else {
DivInstrumentFM::Operator op=ins->fm.op[orderedOps[c.value]];
unsigned short baseAddr=chanOffs[c.chan]|opOffs[orderedOps[c.value]];
rWrite(baseAddr+0x80,(c.value2&31)|(op.rs<<6));
}
break;
}
case DIV_CMD_FM_AM_DEPTH: {
amDepth=c.value;
immWrite(0x19,amDepth);
break;
}
case DIV_CMD_FM_PM_DEPTH: {
pmDepth=c.value;
immWrite(0x19,0x80|pmDepth);
break;
}
case DIV_CMD_STD_NOISE_FREQ: {
if (c.chan!=7) break;
if (c.value) {
if (c.value>0x1f) {
rWrite(0x0f,0x80);
} else {
rWrite(0x0f,0x80|(0x1f-c.value));
}
} else {
rWrite(0x0f,0);
}
break;
}
case DIV_CMD_SAMPLE_BANK:
sampleBank=c.value;
if (sampleBank>(parent->song.sample.size()/12)) {
sampleBank=parent->song.sample.size()/12;
}
break;
case DIV_ALWAYS_SET_VOLUME:
return 0;
break;
case DIV_CMD_GET_VOLMAX:
return 127;
break;
case DIV_CMD_PRE_PORTA:
break;
case DIV_CMD_PRE_NOTE:
break;
case DIV_CMD_SAMPLE_FREQ:
chan[c.chan].pcm.freq=c.value;
if (dumpWrites) {
addWrite(0x10007+(pcmChan<<3),chan[c.chan].pcm.freq);
}
break;
default:
//printf("WARNING: unimplemented command %d\n",c.cmd);
break;
}
return 1;
}
void DivPlatformArcade::forceIns() {
for (int i=0; i<13; i++) {
chan[i].insChanged=true;
}
immWrite(0x19,amDepth);
immWrite(0x19,0x80|pmDepth);
}
void DivPlatformArcade::notifyInsChange(int ins) {
for (int i=0; i<8; i++) {
if (chan[i].ins==ins) {
chan[i].insChanged=true;
}
}
}
void DivPlatformArcade::reset() {
while (!writes.empty()) writes.pop();
if (useYMFM) {
fm_ymfm->reset();
} else {
memset(&fm,0,sizeof(opm_t));
OPM_Reset(&fm);
}
for (int i=0; i<13; i++) {
chan[i]=DivPlatformArcade::Channel();
chan[i].vol=0x7f;
}
for (int i=0; i<256; i++) {
oldWrites[i]=-1;
pendingWrites[i]=-1;
}
lastBusy=60;
pcmCycles=0;
pcmL=0;
pcmR=0;
sampleBank=0;
delay=0;
amDepth=0x7f;
pmDepth=0x7f;
//rWrite(0x18,0x10);
immWrite(0x19,amDepth);
immWrite(0x19,0x80|pmDepth);
//rWrite(0x1b,0x00);
if (dumpWrites) {
for (int i=0; i<5; i++) {
addWrite(0x10086+(i<<3),3);
addWrite(0x10002+(i<<3),0x7f);
addWrite(0x10003+(i<<3),0x7f);
}
}
extMode=false;
}
bool DivPlatformArcade::isStereo() {
return true;
}
void DivPlatformArcade::setYMFM(bool use) {
useYMFM=use;
}
int DivPlatformArcade::init(DivEngine* p, int channels, int sugRate, bool pal) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
for (int i=0; i<13; i++) {
isMuted[i]=false;
}
if (useYMFM) {
rate=447443/8;
fm_ymfm=new ymfm::ym2151(iface);
} else {
rate=447443;
}
reset();
return 13;
}
void DivPlatformArcade::quit() {
if (useYMFM) {
delete fm_ymfm;
}
}
DivPlatformArcade::~DivPlatformArcade() {
}
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