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SegaPCM: new real emulation core

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This commit is contained in:
tildearrow 2023-02-10 02:01:23 -05:00
parent 0d424c7962
commit 6036366f38
9 changed files with 144 additions and 169 deletions
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218
src/engine/platform/segapcm.cpp
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@ -23,47 +23,25 @@
#include <string.h>
#include <math.h>
//#define rWrite(a,v) if (!skipRegisterWrites) {pendingWrites[a]=v;}
//#define immWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
#define rWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
#define chWrite(c,a,v) rWrite(((c)<<3)+(a),v)
void DivPlatformSegaPCM::acquire(short** buf, size_t len) {
static int os[2];
for (size_t h=0; h<len; h++) {
os[0]=0; os[1]=0;
// do a PCM cycle
pcmL=0; pcmR=0;
for (int i=0; i<16; i++) {
if (chan[i].pcm.sample>=0 && chan[i].pcm.sample<parent->song.sampleLen) {
DivSample* s=parent->getSample(chan[i].pcm.sample);
if (s->samples<=0) {
chan[i].pcm.sample=-1;
oscBuf[i]->data[oscBuf[i]->needle++]=0;
continue;
}
if (!isMuted[i]) {
oscBuf[i]->data[oscBuf[i]->needle++]=s->data8[chan[i].pcm.pos>>8]*(chan[i].chVolL+chan[i].chVolR)>>1;
pcmL+=(s->data8[chan[i].pcm.pos>>8]*chan[i].chVolL);
pcmR+=(s->data8[chan[i].pcm.pos>>8]*chan[i].chVolR);
} else {
oscBuf[i]->data[oscBuf[i]->needle++]=0;
}
chan[i].pcm.pos+=chan[i].pcm.freq;
if (s->isLoopable() && chan[i].pcm.pos>=((unsigned int)s->loopEnd<<8)) {
chan[i].pcm.pos=s->loopStart<<8;
} else if (chan[i].pcm.pos>=(s->samples<<8)) {
chan[i].pcm.sample=-1;
}
} else {
oscBuf[i]->data[oscBuf[i]->needle++]=0;
}
while (!writes.empty()) {
QueuedWrite w=writes.front();
pcm.write(w.addr,w.val);
regPool[w.addr&0xff]=w.val;
writes.pop();
}
os[0]=pcmL;
pcm.sound_stream_update(os);
if (os[0]<-32768) os[0]=-32768;
if (os[0]>32767) os[0]=32767;
os[1]=pcmR;
if (os[1]<-32768) os[1]=-32768;
if (os[1]>32767) os[1]=32767;
@ -81,10 +59,8 @@ void DivPlatformSegaPCM::tick(bool sysTick) {
chan[i].outVol=(chan[i].vol*MIN(chan[i].macroVolMul,chan[i].std.vol.val))/chan[i].macroVolMul;
chan[i].chVolL=(chan[i].outVol*chan[i].chPanL)/127;
chan[i].chVolR=(chan[i].outVol*chan[i].chPanR)/127;
if (dumpWrites) {
addWrite(0x10002+(i<<3),chan[i].chVolL);
addWrite(0x10003+(i<<3),chan[i].chVolR);
}
rWrite(2+(i<<3),chan[i].chVolL);
rWrite(3+(i<<3),chan[i].chVolR);
}
}
@ -100,17 +76,13 @@ void DivPlatformSegaPCM::tick(bool sysTick) {
if (parent->song.newSegaPCM) if (chan[i].std.panL.had) {
chan[i].chPanL=chan[i].std.panL.val&127;
chan[i].chVolL=(chan[i].outVol*chan[i].chPanL)/127;
if (dumpWrites) {
addWrite(0x10002+(i<<3),chan[i].chVolL);
}
rWrite(2+(i<<3),chan[i].chVolL);
}
if (parent->song.newSegaPCM) if (chan[i].std.panR.had) {
chan[i].chPanR=chan[i].std.panR.val&127;
chan[i].chVolR=(chan[i].outVol*chan[i].chPanR)/127;
if (dumpWrites) {
addWrite(0x10003+(i<<3),chan[i].chVolR);
}
rWrite(3+(i<<3),chan[i].chVolR);
}
if (chan[i].std.pitch.had) {
@ -145,56 +117,48 @@ void DivPlatformSegaPCM::tick(bool sysTick) {
off=(double)s->centerRate/8363.0;
}
chan[i].pcm.freq=MIN(255,(15625+(off*parent->song.tuning*pow(2.0,double(chan[i].freq+256)/(64.0*12.0)))*255)/31250)+chan[i].pitch2;
if (dumpWrites) {
addWrite(0x10007+(i<<3),chan[i].pcm.freq);
}
rWrite(7+(i<<3),chan[i].pcm.freq);
}
chan[i].freqChanged=false;
if (chan[i].keyOn || chan[i].keyOff) {
if (chan[i].keyOn && !chan[i].keyOff) {
if (dumpWrites) {
addWrite(0x10086+(i<<3),3);
}
rWrite(0x86+(i<<3),3);
chan[i].pcm.pos=0;
if (chan[i].furnacePCM) {
if (dumpWrites) { // Sega PCM writes
DivSample* s=parent->getSample(chan[i].pcm.sample);
int loopStart=s->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
int actualLength=(s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT));
if (actualLength>0xfeff) actualLength=0xfeff;
addWrite(0x10086+(i<<3),3+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
addWrite(0x10084+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample])&0xff);
addWrite(0x10085+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample]>>8)&0xff);
addWrite(0x10006+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-1)>>8));
if (loopStart<0 || loopStart>=actualLength) {
addWrite(0x10086+(i<<3),2+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
} else {
int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart+s->loopOffP;
addWrite(0x10004+(i<<3),loopPos&0xff);
addWrite(0x10005+(i<<3),(loopPos>>8)&0xff);
addWrite(0x10086+(i<<3),((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
}
DivSample* s=parent->getSample(chan[i].pcm.sample);
int loopStart=s->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
int actualLength=(s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT));
if (actualLength>0xfeff) actualLength=0xfeff;
rWrite(0x86+(i<<3),3+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
rWrite(0x84+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample])&0xff);
rWrite(0x85+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample]>>8)&0xff);
rWrite(6+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-1)>>8));
if (loopStart<0 || loopStart>=actualLength) {
rWrite(0x86+(i<<3),2+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
} else {
int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart+sampleLoopOff[chan[i].pcm.sample];
rWrite(4+(i<<3),loopPos&0xff);
rWrite(5+(i<<3),(loopPos>>8)&0xff);
rWrite(0x86+(i<<3),((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
}
} else {
if (dumpWrites) { // Sega PCM writes
DivSample* s=parent->getSample(chan[i].pcm.sample);
int loopStart=s->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
int actualLength=(s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT));
if (actualLength>65536) actualLength=65536;
addWrite(0x10086+(i<<3),3+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
addWrite(0x10084+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample])&0xff);
addWrite(0x10085+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample]>>8)&0xff);
addWrite(0x10006+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-1)>>8));
if (loopStart<0 || loopStart>=actualLength) {
addWrite(0x10086+(i<<3),2+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
} else {
int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart+s->loopOffP;
addWrite(0x10004+(i<<3),loopPos&0xff);
addWrite(0x10005+(i<<3),(loopPos>>8)&0xff);
addWrite(0x10086+(i<<3),((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
}
addWrite(0x10007+(i<<3),chan[i].pcm.freq);
DivSample* s=parent->getSample(chan[i].pcm.sample);
int loopStart=s->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
int actualLength=(s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT));
if (actualLength>0xfeff) actualLength=0xfeff;
rWrite(0x86+(i<<3),3+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
rWrite(0x84+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample])&0xff);
rWrite(0x85+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample]>>8)&0xff);
rWrite(6+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-1)>>8));
if (loopStart<0 || loopStart>=actualLength) {
rWrite(0x86+(i<<3),2+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
} else {
int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart+sampleLoopOff[chan[i].pcm.sample];
rWrite(4+(i<<3),loopPos&0xff);
rWrite(5+(i<<3),(loopPos>>8)&0xff);
rWrite(0x86+(i<<3),((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
}
rWrite(7+(i<<3),chan[i].pcm.freq);
}
}
chan[i].keyOn=false;
@ -206,6 +170,7 @@ void DivPlatformSegaPCM::tick(bool sysTick) {
void DivPlatformSegaPCM::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
pcm.mute(ch,mute);
}
int DivPlatformSegaPCM::dispatch(DivCommand c) {
@ -219,9 +184,7 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
if (c.value!=DIV_NOTE_NULL) chan[c.chan].pcm.sample=ins->amiga.getSample(c.value);
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+(c.chan<<3),3);
}
rWrite(0x86+(c.chan<<3),3);
chan[c.chan].macroInit(NULL);
if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
chan[c.chan].outVol=chan[c.chan].vol;
@ -245,9 +208,7 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
chan[c.chan].pcm.sample=12*sampleBank+chan[c.chan].note%12;
if (chan[c.chan].pcm.sample>=parent->song.sampleLen) {
chan[c.chan].pcm.sample=-1;
if (dumpWrites) {
addWrite(0x10086+(c.chan<<3),3);
}
rWrite(0x86+(c.chan<<3),3);
break;
}
chan[c.chan].pcm.freq=MIN(255,(parent->getSample(chan[c.chan].pcm.sample)->rate*255)/31250);
@ -259,9 +220,7 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
}
case DIV_CMD_NOTE_OFF:
chan[c.chan].pcm.sample=-1;
if (dumpWrites) {
addWrite(0x10086+(c.chan<<3),3);
}
rWrite(0x86+(c.chan<<3),3);
chan[c.chan].keyOff=true;
chan[c.chan].keyOn=false;
chan[c.chan].active=false;
@ -288,10 +247,8 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
chan[c.chan].chVolL=c.value;
chan[c.chan].chVolR=c.value;
}
if (dumpWrites) {
addWrite(0x10002+(c.chan<<3),chan[c.chan].chVolL);
addWrite(0x10003+(c.chan<<3),chan[c.chan].chVolR);
}
rWrite(2+(c.chan<<3),chan[c.chan].chVolL);
rWrite(3+(c.chan<<3),chan[c.chan].chVolR);
break;
}
case DIV_CMD_GET_VOLUME: {
@ -314,10 +271,8 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
chan[c.chan].chVolL=c.value>>1;
chan[c.chan].chVolR=c.value2>>1;
}
if (dumpWrites) {
addWrite(0x10002+(c.chan<<3),chan[c.chan].chVolL);
addWrite(0x10003+(c.chan<<3),chan[c.chan].chVolR);
}
rWrite(2+(c.chan<<3),chan[c.chan].chVolL);
rWrite(3+(c.chan<<3),chan[c.chan].chVolR);
break;
}
case DIV_CMD_PITCH: {
@ -381,9 +336,7 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
break;
case DIV_CMD_SAMPLE_FREQ:
chan[c.chan].pcm.freq=c.value;
if (dumpWrites) {
addWrite(0x10007+(c.chan<<3),chan[c.chan].pcm.freq);
}
rWrite(7+(c.chan<<3),chan[c.chan].pcm.freq);
break;
default:
//printf("WARNING: unimplemented command %d\n",c.cmd);
@ -395,6 +348,10 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
void DivPlatformSegaPCM::forceIns() {
for (int i=0; i<16; i++) {
chan[i].insChanged=true;
rWrite(2+(i<<3),chan[i].chVolL);
rWrite(3+(i<<3),chan[i].chVolR);
rWrite(7+(i<<3),chan[i].pcm.freq);
}
}
@ -425,7 +382,7 @@ DivDispatchOscBuffer* DivPlatformSegaPCM::getOscBuffer(int ch) {
}
unsigned char* DivPlatformSegaPCM::getRegisterPool() {
return regPool;
return pcm.get_ram();
}
int DivPlatformSegaPCM::getRegisterPoolSize() {
@ -433,11 +390,29 @@ int DivPlatformSegaPCM::getRegisterPoolSize() {
}
void DivPlatformSegaPCM::poke(unsigned int addr, unsigned short val) {
//immWrite(addr,val);
rWrite(addr,val);
}
void DivPlatformSegaPCM::poke(std::vector<DivRegWrite>& wlist) {
//for (DivRegWrite& i: wlist) immWrite(i.addr,i.val);
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
const void* DivPlatformSegaPCM::getSampleMem(int index) {
return index == 0 ? sampleMem : NULL;
}
size_t DivPlatformSegaPCM::getSampleMemCapacity(int index) {
return index == 0 ? 16777216 : 0;
}
size_t DivPlatformSegaPCM::getSampleMemUsage(int index) {
return index == 0 ? sampleMemLen : 0;
}
bool DivPlatformSegaPCM::isSampleLoaded(int index, int sample) {
if (index!=0) return false;
if (sample<0 || sample>255) return false;
return sampleLoaded[sample];
}
void DivPlatformSegaPCM::reset() {
@ -457,17 +432,20 @@ void DivPlatformSegaPCM::reset() {
sampleBank=0;
delay=0;
if (dumpWrites) {
for (int i=0; i<16; i++) {
addWrite(0x10086+(i<<3),3);
addWrite(0x10002+(i<<3),0x7f);
addWrite(0x10003+(i<<3),0x7f);
}
pcm.device_start();
for (int i=0; i<16; i++) {
rWrite(0x86+(i<<3),3);
rWrite(2+(i<<3),0x7f);
rWrite(3+(i<<3),0x7f);
}
}
void DivPlatformSegaPCM::renderSamples(int sysID) {
size_t memPos=0;
memset(sampleMem,0,16777216);
memset(sampleLoaded,0,256*sizeof(bool));
for (int i=0; i<parent->song.sampleLen; i++) {
DivSample* sample=parent->getSample(i);
@ -477,6 +455,7 @@ void DivPlatformSegaPCM::reset() {
memPos=(memPos+0xffff)&0xff0000;
}
logV("- sample %d will be at %x with length %x",i,memPos,alignedSize);
sampleLoaded[i]=true;
if (memPos>=16777216) break;
sampleOffSegaPCM[i]=memPos;
unsigned int readPos=0;
@ -484,20 +463,21 @@ void DivPlatformSegaPCM::reset() {
if (readPos>=(unsigned int)sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)) {
if (sample->isLoopable()) {
readPos=sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
memPos++;
sampleMem[memPos++]=((unsigned char)sample->data8[readPos]+0x80);
} else {
memPos++;
sampleMem[memPos++]=0x80;
}
} else {
memPos++;
sampleMem[memPos++]=((unsigned char)sample->data8[readPos]+0x80);
}
readPos++;
if (memPos>=16777216) break;
}
sample->loopOffP=readPos-sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
sampleLoopOff[i]=readPos-sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
if (memPos>=16777216) break;
}
}
sampleMemLen=memPos;
}
void DivPlatformSegaPCM::setFlags(const DivConfig& flags) {
chipClock=8000000.0;
@ -520,6 +500,11 @@ int DivPlatformSegaPCM::init(DivEngine* p, int channels, int sugRate, const DivC
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
sampleMem=new unsigned char[16777216];
pcm.set_bank(segapcm_device::BANK_12M|segapcm_device::BANK_MASKF8);
pcm.set_read([this](unsigned int addr) -> unsigned char {
return sampleMem[addr&0xffffff];
});
setFlags(flags);
reset();
@ -530,6 +515,7 @@ void DivPlatformSegaPCM::quit() {
for (int i=0; i<16; i++) {
delete oscBuf[i];
}
delete sampleMem;
}
DivPlatformSegaPCM::~DivPlatformSegaPCM() {