furnace/src/engine/platform/pce.cpp

644 lines
19 KiB
C++

/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2023 tildearrow and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "pce.h"
#include "../engine.h"
#include <math.h>
//#define rWrite(a,v) pendingWrites[a]=v;
#define rWrite(a,v) if (!skipRegisterWrites) {writes.push(QueuedWrite(a,v)); if (dumpWrites) {addWrite(a,v);} }
#define chWrite(c,a,v) \
if (!skipRegisterWrites) { \
if (curChan!=c) { \
curChan=c; \
rWrite(0,curChan); \
} \
regPool[16+((c)<<4)+((a)&0x0f)]=v; \
rWrite(a,v); \
}
#define CHIP_DIVIDER 32
const char* regCheatSheetPCE[]={
"Select", "0",
"MasterVol", "1",
"FreqL", "2",
"FreqH", "3",
"DataCtl", "4",
"ChanVol", "5",
"WaveCtl", "6",
"NoiseCtl", "7",
"LFOFreq", "8",
"LFOCtl", "9",
NULL
};
const char** DivPlatformPCE::getRegisterSheet() {
return regCheatSheetPCE;
}
void DivPlatformPCE::acquire(short** buf, size_t len) {
for (size_t h=0; h<len; h++) {
// PCM part
for (int i=0; i<6; i++) {
if (chan[i].pcm && chan[i].dacSample!=-1) {
chan[i].dacPeriod+=chan[i].dacRate;
if (chan[i].dacPeriod>rate) {
DivSample* s=parent->getSample(chan[i].dacSample);
if (s->samples<=0) {
chan[i].dacSample=-1;
continue;
}
chWrite(i,0x07,0);
signed char dacData=((signed char)((unsigned char)s->data8[chan[i].dacPos]^0x80))>>3;
chan[i].dacOut=CLAMP(dacData,-16,15);
if (!isMuted[i]) {
chWrite(i,0x04,parent->song.disableSampleMacro?0xdf:(0xc0|chan[i].outVol));
chWrite(i,0x06,chan[i].dacOut&0x1f);
} else {
chWrite(i,0x04,0xc0);
chWrite(i,0x06,0x10);
}
chan[i].dacPos++;
if (s->isLoopable() && chan[i].dacPos>=(unsigned int)s->loopEnd) {
chan[i].dacPos=s->loopStart;
} else if (chan[i].dacPos>=s->samples) {
chan[i].dacSample=-1;
}
chan[i].dacPeriod-=rate;
}
}
}
// PCE part
cycles=0;
while (!writes.empty() && cycles<24) {
QueuedWrite w=writes.front();
pce->Write(cycles,w.addr,w.val);
regPool[w.addr&0x0f]=w.val;
//cycles+=2;
writes.pop();
}
memset(tempL,0,24*sizeof(int));
memset(tempR,0,24*sizeof(int));
pce->Update(24);
pce->ResetTS(0);
for (int i=0; i<6; i++) {
oscBuf[i]->data[oscBuf[i]->needle++]=CLAMP(pce->channel[i].blip_prev_samp[0]+pce->channel[i].blip_prev_samp[1],-32768,32767);
}
tempL[0]=(tempL[0]>>1)+(tempL[0]>>2);
tempR[0]=(tempR[0]>>1)+(tempR[0]>>2);
if (tempL[0]<-32768) tempL[0]=-32768;
if (tempL[0]>32767) tempL[0]=32767;
if (tempR[0]<-32768) tempR[0]=-32768;
if (tempR[0]>32767) tempR[0]=32767;
//printf("tempL: %d tempR: %d\n",tempL,tempR);
buf[0][h]=tempL[0];
buf[1][h]=tempR[0];
}
}
void DivPlatformPCE::updateWave(int ch) {
if (chan[ch].pcm) {
chan[ch].deferredWaveUpdate=true;
return;
}
chWrite(ch,0x04,0x5f);
chWrite(ch,0x04,0x1f);
for (int i=0; i<32; i++) {
chWrite(ch,0x06,chan[ch].ws.output[(i+chan[ch].antiClickWavePos)&31]);
}
chan[ch].antiClickWavePos&=31;
if (chan[ch].active) {
chWrite(ch,0x04,0x80|chan[ch].outVol);
}
if (chan[ch].deferredWaveUpdate) {
chan[ch].deferredWaveUpdate=false;
}
}
// TODO: in octave 6 the noise table changes to a tonal one
static unsigned char noiseFreq[12]={
4,13,15,18,21,23,25,27,29,31,0,2
};
void DivPlatformPCE::tick(bool sysTick) {
for (int i=0; i<6; i++) {
// anti-click
if (antiClickEnabled && sysTick && chan[i].freq>0) {
chan[i].antiClickPeriodCount+=(chipClock/MAX(parent->getCurHz(),1.0f));
chan[i].antiClickWavePos+=chan[i].antiClickPeriodCount/chan[i].freq;
chan[i].antiClickPeriodCount%=chan[i].freq;
}
chan[i].std.next();
if (chan[i].std.vol.had) {
chan[i].outVol=VOL_SCALE_LOG_BROKEN(chan[i].vol&31,MIN(31,chan[i].std.vol.val),31);
if (chan[i].furnaceDac && chan[i].pcm) {
// ignore for now
} else {
chWrite(i,0x04,0x80|chan[i].outVol);
}
}
if (chan[i].std.duty.had && i>=4) {
chan[i].noise=chan[i].std.duty.val;
chan[i].freqChanged=true;
}
if (NEW_ARP_STRAT) {
chan[i].handleArp();
} else if (chan[i].std.arp.had) {
if (!chan[i].inPorta) {
int noiseSeek=parent->calcArp(chan[i].note,chan[i].std.arp.val);
chan[i].baseFreq=NOTE_PERIODIC(noiseSeek);
if (noiseSeek<0) noiseSeek=0;
chan[i].noiseSeek=noiseSeek;
}
chan[i].freqChanged=true;
}
if (chan[i].std.wave.had && !chan[i].pcm) {
if (chan[i].wave!=chan[i].std.wave.val || chan[i].ws.activeChanged()) {
chan[i].wave=chan[i].std.wave.val;
chan[i].ws.changeWave1(chan[i].wave);
if (!chan[i].keyOff) chan[i].keyOn=true;
}
}
if (chan[i].std.panL.had) {
chan[i].pan&=0x0f;
chan[i].pan|=(chan[i].std.panL.val&15)<<4;
}
if (chan[i].std.panR.had) {
chan[i].pan&=0xf0;
chan[i].pan|=chan[i].std.panR.val&15;
}
if (chan[i].std.panL.had || chan[i].std.panR.had) {
chWrite(i,0x05,isMuted[i]?0:chan[i].pan);
}
if (chan[i].std.pitch.had) {
if (chan[i].std.pitch.mode) {
chan[i].pitch2+=chan[i].std.pitch.val;
CLAMP_VAR(chan[i].pitch2,-32768,32767);
} else {
chan[i].pitch2=chan[i].std.pitch.val;
}
chan[i].freqChanged=true;
}
if (chan[i].std.phaseReset.had && chan[i].std.phaseReset.val==1) {
if (chan[i].furnaceDac && chan[i].pcm) {
if (chan[i].active && chan[i].dacSample>=0 && chan[i].dacSample<parent->song.sampleLen) {
chan[i].dacPos=0;
chan[i].dacPeriod=0;
chWrite(i,0x04,parent->song.disableSampleMacro?0xdf:(0xc0|chan[i].vol));
addWrite(0xffff0000+(i<<8),chan[i].dacSample);
chan[i].keyOn=true;
}
}
chan[i].antiClickWavePos=0;
chan[i].antiClickPeriodCount=0;
}
if (chan[i].active) {
if (chan[i].ws.tick() || (chan[i].std.phaseReset.had && chan[i].std.phaseReset.val==1) || chan[i].deferredWaveUpdate) {
updateWave(i);
}
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
//DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_PCE);
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
if (chan[i].furnaceDac && chan[i].pcm) {
double off=1.0;
if (chan[i].dacSample>=0 && chan[i].dacSample<parent->song.sampleLen) {
DivSample* s=parent->getSample(chan[i].dacSample);
if (s->centerRate<1) {
off=1.0;
} else {
off=8363.0/(double)s->centerRate;
}
}
chan[i].dacRate=((double)chipClock/2)/MAX(1,off*chan[i].freq);
if (dumpWrites) addWrite(0xffff0001+(i<<8),chan[i].dacRate);
}
if (chan[i].freq<1) chan[i].freq=1;
if (chan[i].freq>4095) chan[i].freq=4095;
chWrite(i,0x02,chan[i].freq&0xff);
chWrite(i,0x03,chan[i].freq>>8);
if (i>=4) {
int noiseSeek=(chan[i].fixedArp?chan[i].baseNoteOverride:(chan[i].note+chan[i].arpOff))+chan[i].pitch2;
if (!parent->song.properNoiseLayout && noiseSeek<0) noiseSeek=0;
if (!NEW_ARP_STRAT) {
noiseSeek=chan[i].noiseSeek;
}
chWrite(i,0x07,chan[i].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
}
if (chan[i].keyOn) {
//rWrite(16+i*5,0x80);
//chWrite(i,0x04,0x80|chan[i].vol);
}
if (chan[i].keyOff) {
chWrite(i,0x04,0);
}
if (chan[i].keyOn) chan[i].keyOn=false;
if (chan[i].keyOff) chan[i].keyOff=false;
chan[i].freqChanged=false;
}
}
if (updateLFO) {
rWrite(0x08,lfoSpeed);
rWrite(0x09,lfoMode);
updateLFO=false;
}
}
int DivPlatformPCE::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_PCE);
chan[c.chan].macroVolMul=ins->type==DIV_INS_AMIGA?64:31;
if (ins->type==DIV_INS_AMIGA || ins->amiga.useSample) {
chan[c.chan].pcm=true;
} else if (chan[c.chan].furnaceDac) {
chan[c.chan].pcm=false;
}
if (chan[c.chan].pcm) {
if (ins->type==DIV_INS_AMIGA || ins->amiga.useSample) {
chan[c.chan].furnaceDac=true;
if (skipRegisterWrites) break;
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].dacSample=ins->amiga.getSample(c.value);
c.value=ins->amiga.getFreq(c.value);
}
if (chan[c.chan].dacSample<0 || chan[c.chan].dacSample>=parent->song.sampleLen) {
chan[c.chan].dacSample=-1;
if (dumpWrites) addWrite(0xffff0002+(c.chan<<8),0);
break;
} else {
if (dumpWrites) {
chWrite(c.chan,0x04,parent->song.disableSampleMacro?0xdf:(0xc0|chan[c.chan].vol));
addWrite(0xffff0000+(c.chan<<8),chan[c.chan].dacSample);
}
}
chan[c.chan].dacPos=0;
chan[c.chan].dacPeriod=0;
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
}
chan[c.chan].active=true;
chan[c.chan].macroInit(ins);
if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
chan[c.chan].outVol=chan[c.chan].vol;
}
//chan[c.chan].keyOn=true;
} else {
chan[c.chan].furnaceDac=false;
if (skipRegisterWrites) break;
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].note=c.value;
}
chan[c.chan].dacSample=12*sampleBank+chan[c.chan].note%12;
if (chan[c.chan].dacSample>=parent->song.sampleLen) {
chan[c.chan].dacSample=-1;
if (dumpWrites) addWrite(0xffff0002+(c.chan<<8),0);
break;
} else {
if (dumpWrites) addWrite(0xffff0000+(c.chan<<8),chan[c.chan].dacSample);
}
chan[c.chan].dacPos=0;
chan[c.chan].dacPeriod=0;
chan[c.chan].dacRate=parent->getSample(chan[c.chan].dacSample)->rate;
if (dumpWrites) {
chWrite(c.chan,0x04,parent->song.disableSampleMacro?0xdf:(0xc0|chan[c.chan].vol));
addWrite(0xffff0001+(c.chan<<8),chan[c.chan].dacRate);
}
}
break;
}
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
chan[c.chan].noiseSeek=c.value;
if (chan[c.chan].noiseSeek<0) chan[c.chan].noiseSeek=0;
}
chan[c.chan].active=true;
chan[c.chan].keyOn=true;
chWrite(c.chan,0x04,0x80|chan[c.chan].vol);
chan[c.chan].macroInit(ins);
if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
chan[c.chan].outVol=chan[c.chan].vol;
}
if (chan[c.chan].wave<0) {
chan[c.chan].wave=0;
chan[c.chan].ws.changeWave1(chan[c.chan].wave);
}
chan[c.chan].ws.init(ins,32,31,chan[c.chan].insChanged);
chan[c.chan].insChanged=false;
break;
}
case DIV_CMD_NOTE_OFF:
chan[c.chan].dacSample=-1;
if (dumpWrites) addWrite(0xffff0002+(c.chan<<8),0);
chan[c.chan].pcm=false;
chan[c.chan].active=false;
chan[c.chan].keyOff=true;
chan[c.chan].macroInit(NULL);
break;
case DIV_CMD_NOTE_OFF_ENV:
case DIV_CMD_ENV_RELEASE:
chan[c.chan].std.release();
break;
case DIV_CMD_INSTRUMENT:
if (chan[c.chan].ins!=c.value || c.value2==1) {
chan[c.chan].ins=c.value;
chan[c.chan].insChanged=true;
}
break;
case DIV_CMD_VOLUME:
if (chan[c.chan].vol!=c.value) {
chan[c.chan].vol=c.value;
if (!chan[c.chan].std.vol.has) {
chan[c.chan].outVol=c.value;
if (chan[c.chan].active && !chan[c.chan].pcm) {
chWrite(c.chan,0x04,0x80|chan[c.chan].outVol);
}
}
}
break;
case DIV_CMD_GET_VOLUME:
if (chan[c.chan].std.vol.has) {
return chan[c.chan].vol;
}
return chan[c.chan].outVol;
break;
case DIV_CMD_PITCH:
chan[c.chan].pitch=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_WAVE:
chan[c.chan].wave=c.value;
chan[c.chan].ws.changeWave1(chan[c.chan].wave);
chan[c.chan].keyOn=true;
break;
case DIV_CMD_PCE_LFO_MODE:
if (c.value==0) {
lfoMode=0;
} else {
lfoMode=c.value;
}
updateLFO=true;
break;
case DIV_CMD_PCE_LFO_SPEED:
lfoSpeed=255-c.value;
updateLFO=true;
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=NOTE_PERIODIC(c.value2);
bool return2=false;
if (destFreq>chan[c.chan].baseFreq) {
chan[c.chan].baseFreq+=c.value;
if (chan[c.chan].baseFreq>=destFreq) {
chan[c.chan].baseFreq=destFreq;
return2=true;
}
} else {
chan[c.chan].baseFreq-=c.value;
if (chan[c.chan].baseFreq<=destFreq) {
chan[c.chan].baseFreq=destFreq;
return2=true;
}
}
chan[c.chan].freqChanged=true;
if (return2) {
chan[c.chan].inPorta=false;
return 2;
}
break;
}
case DIV_CMD_STD_NOISE_MODE:
chan[c.chan].noise=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_SAMPLE_MODE:
chan[c.chan].pcm=c.value;
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_CMD_PANNING: {
chan[c.chan].pan=(c.value&0xf0)|(c.value2>>4);
chWrite(c.chan,0x05,isMuted[c.chan]?0:chan[c.chan].pan);
break;
}
case DIV_CMD_LEGATO:
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val):(0)));
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
break;
case DIV_CMD_PRE_PORTA:
if (chan[c.chan].active && c.value2) {
if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_PCE));
}
if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will && !NEW_ARP_STRAT) chan[c.chan].baseFreq=NOTE_PERIODIC(chan[c.chan].note);
chan[c.chan].inPorta=c.value;
break;
case DIV_CMD_GET_VOLMAX:
return 31;
break;
case DIV_CMD_MACRO_OFF:
chan[c.chan].std.mask(c.value,true);
break;
case DIV_CMD_MACRO_ON:
chan[c.chan].std.mask(c.value,false);
break;
case DIV_ALWAYS_SET_VOLUME:
return 1;
break;
default:
break;
}
return 1;
}
void DivPlatformPCE::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
chWrite(ch,0x05,isMuted[ch]?0:chan[ch].pan);
if (!isMuted[ch] && (chan[ch].pcm && chan[ch].dacSample!=-1)) {
chWrite(ch,0x04,parent->song.disableSampleMacro?0xdf:(0xc0|chan[ch].outVol));
chWrite(ch,0x06,chan[ch].dacOut&0x1f);
}
}
void DivPlatformPCE::forceIns() {
for (int i=0; i<6; i++) {
chan[i].insChanged=true;
chan[i].freqChanged=true;
updateWave(i);
chWrite(i,0x05,isMuted[i]?0:chan[i].pan);
}
}
void* DivPlatformPCE::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformPCE::getChanMacroInt(int ch) {
return &chan[ch].std;
}
DivSamplePos DivPlatformPCE::getSamplePos(int ch) {
if (ch>=6) return DivSamplePos();
if (!chan[ch].pcm) return DivSamplePos();
return DivSamplePos(
chan[ch].dacSample,
chan[ch].dacPos,
chan[ch].dacRate
);
}
DivDispatchOscBuffer* DivPlatformPCE::getOscBuffer(int ch) {
return oscBuf[ch];
}
unsigned char* DivPlatformPCE::getRegisterPool() {
return regPool;
}
int DivPlatformPCE::getRegisterPoolSize() {
return 112;
}
void DivPlatformPCE::reset() {
writes.clear();
memset(regPool,0,128);
for (int i=0; i<6; i++) {
chan[i]=DivPlatformPCE::Channel();
chan[i].std.setEngine(parent);
chan[i].ws.setEngine(parent);
chan[i].ws.init(NULL,32,31,false);
}
if (dumpWrites) {
addWrite(0xffffffff,0);
}
pce->Power(0);
lastPan=0xff;
memset(tempL,0,32*sizeof(int));
memset(tempR,0,32*sizeof(int));
cycles=0;
curChan=-1;
sampleBank=0;
lfoMode=0;
lfoSpeed=255;
// set global volume
rWrite(0,0);
rWrite(0x01,0xff);
// set LFO
updateLFO=true;
// set per-channel initial panning
for (int i=0; i<6; i++) {
chWrite(i,0x05,isMuted[i]?0:chan[i].pan);
}
delay=500;
}
int DivPlatformPCE::getOutputCount() {
return 2;
}
bool DivPlatformPCE::keyOffAffectsArp(int ch) {
return true;
}
void DivPlatformPCE::notifyWaveChange(int wave) {
for (int i=0; i<6; i++) {
if (chan[i].wave==wave) {
chan[i].ws.changeWave1(wave);
updateWave(i);
}
}
}
void DivPlatformPCE::notifyInsDeletion(void* ins) {
for (int i=0; i<6; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformPCE::setFlags(const DivConfig& flags) {
if (flags.getInt("clockSel",0)) { // technically there is no PAL PC Engine but oh well...
chipClock=COLOR_PAL*4.0/5.0;
} else {
chipClock=COLOR_NTSC;
}
CHECK_CUSTOM_CLOCK;
antiClickEnabled=!flags.getBool("noAntiClick",false);
rate=chipClock/12;
for (int i=0; i<6; i++) {
oscBuf[i]->rate=rate;
}
if (pce!=NULL) {
delete pce;
pce=NULL;
}
pce=new PCE_PSG(tempL,tempR,flags.getInt("chipType",0)?PCE_PSG::REVISION_HUC6280A:PCE_PSG::REVISION_HUC6280);
}
void DivPlatformPCE::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformPCE::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
int DivPlatformPCE::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
updateLFO=false;
for (int i=0; i<6; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
pce=NULL;
setFlags(flags);
reset();
return 6;
}
void DivPlatformPCE::quit() {
for (int i=0; i<6; i++) {
delete oscBuf[i];
}
if (pce!=NULL) {
delete pce;
pce=NULL;
}
}
DivPlatformPCE::~DivPlatformPCE() {
}