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furnace/src/engine/platform/su.cpp

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/**
* 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 "su.h"
#include "../engine.h"
#include "../../ta-log.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) rWrite(((c)<<5)|(a),v);
#define CHIP_DIVIDER 2
#define CHIP_FREQBASE 524288
const char** DivPlatformSoundUnit::getRegisterSheet() {
return NULL;
}
double DivPlatformSoundUnit::NOTE_SU(int ch, int note) {
if (chan[ch].switchRoles) {
return NOTE_PERIODIC(note);
}
return NOTE_FREQUENCY(note);
}
void DivPlatformSoundUnit::acquire(short** buf, size_t len) {
for (size_t h=0; h<len; h++) {
while (!writes.empty()) {
QueuedWrite w=writes.front();
su->Write(w.addr,w.val);
writes.pop();
}
su->NextSample(&buf[0][h],&buf[1][h]);
for (int i=0; i<8; i++) {
oscBuf[i]->data[oscBuf[i]->needle++]=su->GetSample(i);
}
}
}
void DivPlatformSoundUnit::writeControl(int ch) {
chWrite(ch,0x04,(chan[ch].wave&7)|(chan[ch].pcm<<3)|(chan[ch].control<<4));
}
void DivPlatformSoundUnit::writeControlUpper(int ch) {
chWrite(ch,0x05,((int)chan[ch].phaseReset)|(chan[ch].filterPhaseReset<<1)|(chan[ch].pcmLoop<<2)|(chan[ch].timerSync<<3)|(chan[ch].freqSweep<<4)|(chan[ch].volSweep<<5)|(chan[ch].cutSweep<<6));
chan[ch].phaseReset=false;
chan[ch].filterPhaseReset=false;
}
void DivPlatformSoundUnit::tick(bool sysTick) {
for (int i=0; i<8; i++) {
chan[i].std.next();
if (chan[i].std.vol.had) {
DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_SU);
if (ins->type==DIV_INS_AMIGA) {
chan[i].outVol=((chan[i].vol&127)*MIN(64,chan[i].std.vol.val))>>6;
} else {
chan[i].outVol=((chan[i].vol&127)*MIN(127,chan[i].std.vol.val))>>7;
}
chWrite(i,0x02,chan[i].outVol);
}
if (NEW_ARP_STRAT) {
chan[i].handleArp();
} else if (chan[i].std.arp.had) {
if (!chan[i].inPorta) {
chan[i].baseFreq=NOTE_SU(i,parent->calcArp(chan[i].note,chan[i].std.arp.val));
}
chan[i].freqChanged=true;
}
if (chan[i].std.duty.had) {
chan[i].duty=chan[i].std.duty.val;
chWrite(i,0x08,chan[i].duty);
}
if (chan[i].std.wave.had) {
chan[i].wave=chan[i].std.wave.val&7;
writeControl(i);
}
if (chan[i].std.phaseReset.had) {
chan[i].phaseReset=chan[i].std.phaseReset.val;
writeControlUpper(i);
}
if (chan[i].std.panL.had) {
chan[i].pan=chan[i].std.panL.val;
chWrite(i,0x03,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.ex1.had) {
chan[i].cutoff=((chan[i].std.ex1.val&16383)*chan[i].baseCutoff)/16380;
chWrite(i,0x06,chan[i].cutoff&0xff);
chWrite(i,0x07,chan[i].cutoff>>8);
}
if (chan[i].std.ex2.had) {
chan[i].res=chan[i].std.ex2.val;
chWrite(i,0x09,chan[i].res);
}
if (chan[i].std.ex3.had) {
chan[i].control=chan[i].std.ex3.val&15;
writeControl(i);
}
if (chan[i].std.ex4.had) {
chan[i].syncTimer=chan[i].std.ex4.val&65535;
chan[i].timerSync=(chan[i].syncTimer>0);
if (chan[i].switchRoles) {
chWrite(i,0x00,chan[i].syncTimer&0xff);
chWrite(i,0x01,chan[i].syncTimer>>8);
} else {
chWrite(i,0x1e,chan[i].syncTimer&0xff);
chWrite(i,0x1f,chan[i].syncTimer>>8);
}
writeControlUpper(i);
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
//DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_SU);
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,chan[i].switchRoles,2,chan[i].pitch2,chipClock,chan[i].switchRoles?CHIP_DIVIDER:CHIP_FREQBASE);
if (chan[i].pcm) {
DivSample* sample=parent->getSample(chan[i].sample);
if (sample!=NULL) {
double off=0.25;
if (sample->centerRate<1) {
off=0.25;
} else {
off=(double)sample->centerRate/(8363.0*4.0);
}
chan[i].freq=(double)chan[i].freq*off;
}
}
if (chan[i].freq<0) chan[i].freq=0;
if (chan[i].freq>65535) chan[i].freq=65535;
if (chan[i].switchRoles) {
chWrite(i,0x1e,chan[i].freq&0xff);
chWrite(i,0x1f,chan[i].freq>>8);
} else {
chWrite(i,0x00,chan[i].freq&0xff);
chWrite(i,0x01,chan[i].freq>>8);
}
if (chan[i].keyOn) {
if (chan[i].pcm) {
DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_SU);
int sNum=ins->amiga.getSample(chan[i].note);
DivSample* sample=parent->getSample(sNum);
if (sample!=NULL && sNum>=0 && sNum<parent->song.sampleLen) {
unsigned int sampleEnd=sampleOffSU[sNum]+(sample->getLoopEndPosition());
unsigned int off=sampleOffSU[sNum]+chan[i].hasOffset;
chan[i].hasOffset=0;
if (sampleEnd>=getSampleMemCapacity(0)) sampleEnd=getSampleMemCapacity(0)-1;
chWrite(i,0x0a,off&0xff);
chWrite(i,0x0b,off>>8);
chWrite(i,0x0c,sampleEnd&0xff);
chWrite(i,0x0d,sampleEnd>>8);
if (sample->isLoopable()) {
unsigned int sampleLoop=sampleOffSU[sNum]+sample->getLoopStartPosition();
if (sampleLoop>=getSampleMemCapacity(0)) sampleLoop=getSampleMemCapacity(0)-1;
chWrite(i,0x0e,sampleLoop&0xff);
chWrite(i,0x0f,sampleLoop>>8);
chan[i].pcmLoop=true;
} else {
chan[i].pcmLoop=false;
}
writeControl(i);
writeControlUpper(i);
}
}
}
if (chan[i].keyOff) {
chWrite(i,0x02,0);
}
if (chan[i].keyOn) chan[i].keyOn=false;
if (chan[i].keyOff) chan[i].keyOff=false;
chan[i].freqChanged=false;
}
}
}
int DivPlatformSoundUnit::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_SU);
chan[c.chan].switchRoles=ins->su.switchRoles;
if (chan[c.chan].pcm && !(ins->type==DIV_INS_AMIGA || ins->amiga.useSample)) {
chan[c.chan].pcm=(ins->type==DIV_INS_AMIGA || ins->amiga.useSample);
writeControl(c.chan);
writeControlUpper(c.chan);
}
chan[c.chan].pcm=(ins->type==DIV_INS_AMIGA || ins->amiga.useSample);
if (chan[c.chan].pcm) {
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].sample=ins->amiga.getSample(c.value);
c.value=ins->amiga.getFreq(c.value);
}
}
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=NOTE_SU(c.chan,c.value);
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
}
chan[c.chan].active=true;
chan[c.chan].keyOn=true;
chWrite(c.chan,0x02,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;
}
chan[c.chan].insChanged=false;
break;
}
case DIV_CMD_NOTE_OFF:
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) chWrite(c.chan,0x02,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&7;
writeControl(c.chan);
break;
case DIV_CMD_STD_NOISE_MODE:
chan[c.chan].duty=c.value&127;
chWrite(c.chan,0x08,chan[c.chan].duty);
break;
case DIV_CMD_C64_RESONANCE:
chan[c.chan].res=c.value;
chWrite(c.chan,0x09,chan[c.chan].res);
break;
case DIV_CMD_C64_FILTER_MODE:
chan[c.chan].control=c.value&15;
break;
case DIV_CMD_SU_SWEEP_PERIOD_LOW: {
switch (c.value) {
case 0:
chan[c.chan].freqSweepP=(chan[c.chan].freqSweepP&0xff00)|c.value2;
chWrite(c.chan,0x10,chan[c.chan].freqSweepP&0xff);
break;
case 1:
chan[c.chan].volSweepP=(chan[c.chan].volSweepP&0xff00)|c.value2;
chWrite(c.chan,0x14,chan[c.chan].volSweepP&0xff);
break;
case 2:
chan[c.chan].cutSweepP=(chan[c.chan].cutSweepP&0xff00)|c.value2;
chWrite(c.chan,0x18,chan[c.chan].cutSweepP&0xff);
break;
}
break;
}
case DIV_CMD_SU_SWEEP_PERIOD_HIGH: {
switch (c.value) {
case 0:
chan[c.chan].freqSweepP=(chan[c.chan].freqSweepP&0xff)|(c.value2<<8);
chWrite(c.chan,0x11,chan[c.chan].freqSweepP>>8);
break;
case 1:
chan[c.chan].volSweepP=(chan[c.chan].volSweepP&0xff)|(c.value2<<8);
chWrite(c.chan,0x15,chan[c.chan].volSweepP>>8);
break;
case 2:
chan[c.chan].cutSweepP=(chan[c.chan].cutSweepP&0xff)|(c.value2<<8);
chWrite(c.chan,0x19,chan[c.chan].cutSweepP>>8);
break;
}
break;
}
case DIV_CMD_SU_SWEEP_BOUND: {
switch (c.value) {
case 0:
chan[c.chan].freqSweepB=c.value2;
chWrite(c.chan,0x13,chan[c.chan].freqSweepB);
break;
case 1:
chan[c.chan].volSweepB=c.value2;
chWrite(c.chan,0x17,chan[c.chan].volSweepB);
break;
case 2:
chan[c.chan].cutSweepB=c.value2;
chWrite(c.chan,0x1b,chan[c.chan].cutSweepB);
break;
}
break;
}
case DIV_CMD_SU_SWEEP_ENABLE: {
switch (c.value) {
case 0:
chan[c.chan].freqSweepV=c.value2;
chan[c.chan].freqSweep=(c.value2>0);
chWrite(c.chan,0x12,chan[c.chan].freqSweepV);
break;
case 1:
chan[c.chan].volSweepV=c.value2;
chan[c.chan].volSweep=(c.value2>0);
chWrite(c.chan,0x16,chan[c.chan].volSweepV);
break;
case 2:
chan[c.chan].cutSweepV=c.value2;
chan[c.chan].cutSweep=(c.value2>0);
chWrite(c.chan,0x1a,chan[c.chan].cutSweepV);
break;
}
writeControlUpper(c.chan);
break;
}
case DIV_CMD_SU_SYNC_PERIOD_LOW:
chan[c.chan].syncTimer=(chan[c.chan].syncTimer&0xff00)|c.value;
chan[c.chan].timerSync=(chan[c.chan].syncTimer>0);
chWrite(c.chan,0x1e,chan[c.chan].syncTimer&0xff);
chWrite(c.chan,0x1f,chan[c.chan].syncTimer>>8);
writeControlUpper(c.chan);
break;
case DIV_CMD_SU_SYNC_PERIOD_HIGH:
chan[c.chan].syncTimer=(chan[c.chan].syncTimer&0xff)|(c.value<<8);
chan[c.chan].timerSync=(chan[c.chan].syncTimer>0);
chWrite(c.chan,0x1e,chan[c.chan].syncTimer&0xff);
chWrite(c.chan,0x1f,chan[c.chan].syncTimer>>8);
writeControlUpper(c.chan);
break;
case DIV_CMD_C64_FINE_CUTOFF:
chan[c.chan].baseCutoff=c.value*4;
if (!chan[c.chan].std.ex1.has) {
chan[c.chan].cutoff=chan[c.chan].baseCutoff;
chWrite(c.chan,0x06,chan[c.chan].cutoff&0xff);
chWrite(c.chan,0x07,chan[c.chan].cutoff>>8);
}
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=NOTE_SU(c.chan,c.value2);
bool return2=false;
if (destFreq>chan[c.chan].baseFreq) {
chan[c.chan].baseFreq+=c.value*((parent->song.linearPitch==2)?1:(1+(chan[c.chan].baseFreq>>9)));
if (chan[c.chan].baseFreq>=destFreq) {
chan[c.chan].baseFreq=destFreq;
return2=true;
}
} else {
chan[c.chan].baseFreq-=c.value*((parent->song.linearPitch==2)?1:(1+(chan[c.chan].baseFreq>>9)));
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_PANNING: {
chan[c.chan].pan=parent->convertPanSplitToLinearLR(c.value,c.value2,254)-127;
chWrite(c.chan,0x03,chan[c.chan].pan);
break;
}
case DIV_CMD_SAMPLE_POS:
chan[c.chan].hasOffset=c.value;
chan[c.chan].keyOn=true;
break;
case DIV_CMD_LEGATO:
chan[c.chan].baseFreq=NOTE_SU(c.chan,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_SU));
}
if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will && !NEW_ARP_STRAT) chan[c.chan].baseFreq=NOTE_SU(c.chan,chan[c.chan].note);
chan[c.chan].inPorta=c.value;
break;
case DIV_CMD_GET_VOLMAX:
return 127;
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 DivPlatformSoundUnit::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
su->muted[ch]=mute;
}
void DivPlatformSoundUnit::forceIns() {
for (int i=0; i<8; i++) {
chan[i].insChanged=true;
chan[i].freqChanged=true;
// restore channel attributes
chWrite(i,0x03,chan[i].pan);
writeControl(i);
writeControlUpper(i);
}
}
void* DivPlatformSoundUnit::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformSoundUnit::getChanMacroInt(int ch) {
return &chan[ch].std;
}
DivDispatchOscBuffer* DivPlatformSoundUnit::getOscBuffer(int ch) {
return oscBuf[ch];
}
unsigned char* DivPlatformSoundUnit::getRegisterPool() {
return (unsigned char*)su->chan;
}
int DivPlatformSoundUnit::getRegisterPoolSize() {
return 256;
}
void DivPlatformSoundUnit::reset() {
while (!writes.empty()) writes.pop();
memset(regPool,0,128);
for (int i=0; i<8; i++) {
chan[i]=DivPlatformSoundUnit::Channel();
chan[i].std.setEngine(parent);
}
if (dumpWrites) {
addWrite(0xffffffff,0);
}
su->Reset();
for (int i=0; i<8; i++) {
chWrite(i,0x08,0x3f);
}
lastPan=0xff;
cycles=0;
curChan=-1;
sampleBank=0;
lfoMode=0;
lfoSpeed=255;
delay=500;
// set initial IL status
ilCtrl=initIlCtrl;
ilSize=initIlSize;
fil1=initFil1;
echoVol=initEchoVol;
rWrite(0x9c,echoVol);
rWrite(0x9d,ilCtrl);
rWrite(0xbc,ilSize);
rWrite(0xbd,fil1);
// copy sample memory
memcpy(su->pcm,sampleMem,sampleMemSize?65536:8192);
}
int DivPlatformSoundUnit::getOutputCount() {
return 2;
}
bool DivPlatformSoundUnit::keyOffAffectsArp(int ch) {
return true;
}
void DivPlatformSoundUnit::notifyInsDeletion(void* ins) {
for (int i=0; i<8; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformSoundUnit::setFlags(const DivConfig& flags) {
if (flags.getInt("clockSel",0)) {
chipClock=1190000;
} else {
chipClock=1236000;
}
CHECK_CUSTOM_CLOCK;
rate=chipClock/4;
for (int i=0; i<8; i++) {
oscBuf[i]->rate=rate;
}
bool echoOn=flags.getBool("echo",false);
initIlCtrl=3|(echoOn?4:0);
initIlSize=((flags.getInt("echoDelay",0))&63)|(echoOn?0x40:0)|(flags.getBool("swapEcho",false)?0x80:0);
initFil1=flags.getInt("echoFeedback",0)|(flags.getInt("echoResolution",0)<<4);
initEchoVol=flags.getInt("echoVol",0);
sampleMemSize=flags.getInt("sampleMemSize",0);
su->Init(sampleMemSize?65536:8192,flags.getBool("pdm",false));
renderSamples(sysIDCache);
}
void DivPlatformSoundUnit::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformSoundUnit::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
const void* DivPlatformSoundUnit::getSampleMem(int index) {
return (index==0)?sampleMem:NULL;
}
size_t DivPlatformSoundUnit::getSampleMemCapacity(int index) {
return (index==0)?((sampleMemSize?65536:8192)-((initIlSize&64)?((1+(initIlSize&63))<<7):0)):0;
}
size_t DivPlatformSoundUnit::getSampleMemUsage(int index) {
return (index==0)?sampleMemLen:0;
}
bool DivPlatformSoundUnit::isSampleLoaded(int index, int sample) {
if (index!=0) return false;
if (sample<0 || sample>255) return false;
return sampleLoaded[sample];
}
void DivPlatformSoundUnit::renderSamples(int sysID) {
memset(sampleMem,0,sampleMemSize?65536:8192);
memset(sampleOffSU,0,256*sizeof(unsigned int));
memset(sampleLoaded,0,256*sizeof(bool));
size_t memPos=0;
for (int i=0; i<parent->song.sampleLen; i++) {
DivSample* s=parent->song.sample[i];
if (s->data8==NULL) continue;
if (!s->renderOn[0][sysID]) {
sampleOffSU[i]=0;
continue;
}
int paddedLen=s->length8;
if (memPos>=getSampleMemCapacity(0)) {
logW("out of PCM memory for sample %d!",i);
break;
}
if (memPos+paddedLen>=getSampleMemCapacity(0)) {
memcpy(sampleMem+memPos,s->data8,getSampleMemCapacity(0)-memPos);
logW("out of PCM memory for sample %d!",i);
} else {
memcpy(sampleMem+memPos,s->data8,paddedLen);
sampleLoaded[i]=true;
}
sampleOffSU[i]=memPos;
memPos+=paddedLen;
}
sampleMemLen=memPos;
sysIDCache=sysID;
memcpy(su->pcm,sampleMem,sampleMemSize?65536:8192);
}
int DivPlatformSoundUnit::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
for (int i=0; i<8; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
su=new SoundUnit();
sampleMem=new unsigned char[65536];
memset(sampleMem,0,65536);
sysIDCache=0;
setFlags(flags);
reset();
return 8;
}
void DivPlatformSoundUnit::quit() {
for (int i=0; i<8; i++) {
delete oscBuf[i];
}
delete su;
delete sampleMem;
}
DivPlatformSoundUnit::~DivPlatformSoundUnit() {
}
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