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furnace/src/engine/platform/pce.cpp
tildearrow 59d813db7c PCE: add noise macro (finally!)
2022-03-04 02:20:13 -05:00

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/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2022 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.emplace(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;
}
const char* DivPlatformPCE::getEffectName(unsigned char effect) {
switch (effect) {
case 0x10:
return "10xx: Change waveform";
break;
case 0x11:
return "11xx: Toggle noise mode";
break;
case 0x12:
return "12xx: Setup LFO (0: disabled; 1: 1x depth; 2: 16x depth; 3: 256x depth)";
break;
case 0x13:
return "13xx: Set LFO speed";
break;
case 0x17:
return "17xx: Toggle PCM mode";
break;
}
return NULL;
}
void DivPlatformPCE::acquire(short* bufL, short* bufR, size_t start, size_t len) {
for (size_t h=start; h<start+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);
chWrite(i,0x04,0xdf);
chWrite(i,0x06,(((unsigned char)s->data8[chan[i].dacPos]+0x80)>>3));
chan[i].dacPos++;
if (chan[i].dacPos>=s->samples) {
if (s->loopStart>=0 && s->loopStart<=(int)s->samples) {
chan[i].dacPos=s->loopStart;
} else {
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);
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);
bufL[h]=tempL[0];
bufR[h]=tempR[0];
}
}
void DivPlatformPCE::updateWave(int ch) {
DivWavetable* wt=parent->getWave(chan[ch].wave);
chWrite(ch,0x04,0x5f);
chWrite(ch,0x04,0x1f);
for (int i=0; i<32; i++) {
if (wt->max<1 || wt->len<1) {
chWrite(ch,0x06,0);
} else {
chWrite(ch,0x06,wt->data[i*wt->len/32]*31/wt->max);
}
}
if (chan[ch].active) {
chWrite(ch,0x04,0x80|chan[ch].outVol);
}
}
// 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() {
for (int i=0; i<6; i++) {
chan[i].std.next();
if (chan[i].std.hadVol) {
chan[i].outVol=((chan[i].vol&31)*MIN(31,chan[i].std.vol))>>5;
if (chan[i].furnaceDac) {
// ignore for now
} else {
chWrite(i,0x04,0x80|chan[i].outVol);
}
}
if (chan[i].std.hadDuty && i>=4) {
chan[i].noise=chan[i].std.duty;
chan[i].freqChanged=true;
int noiseSeek=chan[i].note;
if (noiseSeek<0) noiseSeek=0;
chWrite(i,0x07,chan[i].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
}
if (chan[i].std.hadArp) {
if (!chan[i].inPorta) {
if (chan[i].std.arpMode) {
chan[i].baseFreq=NOTE_PERIODIC(chan[i].std.arp);
// noise
int noiseSeek=chan[i].std.arp;
if (noiseSeek<0) noiseSeek=0;
chWrite(i,0x07,chan[i].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
} else {
chan[i].baseFreq=NOTE_PERIODIC(chan[i].note+chan[i].std.arp);
int noiseSeek=chan[i].note+chan[i].std.arp;
if (noiseSeek<0) noiseSeek=0;
chWrite(i,0x07,chan[i].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
}
}
chan[i].freqChanged=true;
} else {
if (chan[i].std.arpMode && chan[i].std.finishedArp) {
chan[i].baseFreq=NOTE_PERIODIC(chan[i].note);
int noiseSeek=chan[i].note;
if (noiseSeek<0) noiseSeek=0;
chWrite(i,0x07,chan[i].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
chan[i].freqChanged=true;
}
}
if (chan[i].std.hadWave && !chan[i].pcm) {
if (chan[i].wave!=chan[i].std.wave) {
chan[i].wave=chan[i].std.wave;
updateWave(i);
if (!chan[i].keyOff) chan[i].keyOn=true;
}
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
//DivInstrument* ins=parent->getIns(chan[i].ins);
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true);
if (chan[i].furnaceDac) {
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>4095) chan[i].freq=4095;
chWrite(i,0x02,chan[i].freq&0xff);
chWrite(i,0x03,chan[i].freq>>8);
if (chan[i].keyOn) {
if (chan[i].wave<0) {
chan[i].wave=0;
updateWave(i);
}
//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;
}
}
}
int DivPlatformPCE::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
if (ins->type==DIV_INS_AMIGA) {
chan[c.chan].pcm=true;
} else if (chan[c.chan].furnaceDac) {
chan[c.chan].pcm=false;
}
if (chan[c.chan].pcm) {
if (skipRegisterWrites) break;
if (ins->type==DIV_INS_AMIGA) {
chan[c.chan].dacSample=ins->amiga.initSample;
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,0x04,0xdf);
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].std.init(ins);
//chan[c.chan].keyOn=true;
chan[c.chan].furnaceDac=true;
} else {
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,0x04,0xdf);
addWrite(0xffff0001+(c.chan<<8),chan[c.chan].dacRate);
}
chan[c.chan].furnaceDac=false;
}
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;
int noiseSeek=chan[c.chan].note;
if (noiseSeek<0) noiseSeek=0;
chWrite(c.chan,0x07,chan[c.chan].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
}
chan[c.chan].active=true;
chan[c.chan].keyOn=true;
chWrite(c.chan,0x04,0x80|chan[c.chan].vol);
chan[c.chan].std.init(ins);
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].std.init(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;
}
break;
case DIV_CMD_VOLUME:
if (chan[c.chan].vol!=c.value) {
chan[c.chan].vol=c.value;
if (!chan[c.chan].std.hasVol) {
chan[c.chan].outVol=c.value;
if (chan[c.chan].active) chWrite(c.chan,0x04,0x80|chan[c.chan].outVol);
}
}
break;
case DIV_CMD_GET_VOLUME:
if (chan[c.chan].std.hasVol) {
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;
updateWave(c.chan);
chan[c.chan].keyOn=true;
break;
case DIV_CMD_PCE_LFO_MODE:
if (c.value==0) {
lfoMode=0;
} else {
lfoMode=c.value;
}
rWrite(0x08,lfoSpeed);
rWrite(0x09,lfoMode);
break;
case DIV_CMD_PCE_LFO_SPEED:
lfoSpeed=255-c.value;
rWrite(0x08,lfoSpeed);
rWrite(0x09,lfoMode);
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;
chWrite(c.chan,0x07,chan[c.chan].noise?(0x80|chan[c.chan].note):0);
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;
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+((chan[c.chan].std.willArp && !chan[c.chan].std.arpMode)?(chan[c.chan].std.arp):(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].std.init(parent->getIns(chan[c.chan].ins));
}
chan[c.chan].inPorta=c.value;
break;
case DIV_CMD_GET_VOLMAX:
return 31;
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);
}
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];
}
unsigned char* DivPlatformPCE::getRegisterPool() {
return regPool;
}
int DivPlatformPCE::getRegisterPoolSize() {
return 112;
}
void DivPlatformPCE::reset() {
while (!writes.empty()) writes.pop();
memset(regPool,0,128);
for (int i=0; i<6; i++) {
chan[i]=DivPlatformPCE::Channel();
}
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
rWrite(0x08,lfoSpeed);
rWrite(0x09,lfoMode);
// set per-channel initial panning
for (int i=0; i<6; i++) {
chWrite(i,0x05,isMuted[i]?0:chan[i].pan);
}
delay=500;
}
bool DivPlatformPCE::isStereo() {
return true;
}
bool DivPlatformPCE::keyOffAffectsArp(int ch) {
return true;
}
void DivPlatformPCE::notifyWaveChange(int wave) {
for (int i=0; i<6; i++) {
if (chan[i].wave==wave) {
updateWave(i);
}
}
}
void DivPlatformPCE::notifyInsDeletion(void* ins) {
for (int i=0; i<6; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformPCE::setFlags(unsigned int flags) {
if (flags&1) { // technically there is no PAL PC Engine but oh well...
chipClock=COLOR_PAL*4.0/5.0;
} else {
chipClock=COLOR_NTSC;
}
rate=chipClock/12;
}
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, unsigned int flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
for (int i=0; i<6; i++) {
isMuted[i]=false;
}
setFlags(flags);
pce=new PCE_PSG(tempL,tempR,PCE_PSG::REVISION_HUC6280A);
reset();
return 6;
}
void DivPlatformPCE::quit() {
delete pce;
}
DivPlatformPCE::~DivPlatformPCE() {
}
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