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furnace/src/engine/platform/su.cpp
tildearrow c009cb3536 dev112 - prepare for advanced arp macro 
this new advanced arp macro offers more flexibility and reduces code duplication
it allows you to set each step of the macro to either relative or fixed mode
(instead of just one mode for the entire macro)

the UI is still a work in progress and doesn't work well

this change is big and may break things! further fixes incoming
2022-08-22 15:59:45 -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 "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.emplace(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* bufL, short* bufR, size_t start, size_t len) {
for (size_t h=start; h<start+len; h++) {
while (!writes.empty()) {
QueuedWrite w=writes.front();
su->Write(w.addr,w.val);
writes.pop();
}
su->NextSample(&bufL[h],&bufR[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 (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].switchRoles,2,chan[i].pitch2,chipClock,chan[i].switchRoles?CHIP_DIVIDER:CHIP_FREQBASE);
if (chan[i].pcm) {
DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_SU);
// TODO: sample map?
DivSample* sample=parent->getSample(ins->amiga.getSample(chan[i].note));
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);
DivSample* sample=parent->getSample(ins->amiga.getSample(chan[i].note));
if (sample!=NULL) {
unsigned int sampleEnd=sample->offSU+(sample->getEndPosition());
unsigned int off=sample->offSU+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=sample->offSU+sample->loopStart;
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->su.useSample)) {
chan[c.chan].pcm=(ins->type==DIV_INS_AMIGA || ins->su.useSample);
writeControl(c.chan);
writeControlUpper(c.chan);
}
chan[c.chan].pcm=(ins->type==DIV_INS_AMIGA || ins->su.useSample);
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;
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+((chan[c.chan].std.arp.will && !chan[c.chan].std.arp.mode)?(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) 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_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);
}
bool DivPlatformSoundUnit::isStereo() {
return true;
}
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(unsigned int flags) {
if (flags&1) {
chipClock=1190000;
} else {
chipClock=1236000;
}
rate=chipClock/4;
for (int i=0; i<8; i++) {
oscBuf[i]->rate=rate;
}
initIlCtrl=3|(flags&4);
initIlSize=((flags>>8)&63)|((flags&4)?0x40:0)|((flags&8)?0x80:0);
initFil1=flags>>16;
initEchoVol=flags>>24;
sampleMemSize=flags&16;
su->Init(sampleMemSize?65536:8192,flags&32);
renderSamples();
}
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)?su->pcm: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;
}
void DivPlatformSoundUnit::renderSamples() {
memset(su->pcm,0,getSampleMemCapacity(0));
size_t memPos=0;
for (int i=0; i<parent->song.sampleLen; i++) {
DivSample* s=parent->song.sample[i];
if (s->data8==NULL) continue;
int paddedLen=s->samples;
if (memPos>=getSampleMemCapacity(0)) {
logW("out of PCM memory for sample %d!",i);
break;
}
if (memPos+paddedLen>=getSampleMemCapacity(0)) {
memcpy(su->pcm+memPos,s->data8,getSampleMemCapacity(0)-memPos);
logW("out of PCM memory for sample %d!",i);
} else {
memcpy(su->pcm+memPos,s->data8,paddedLen);
}
s->offSU=memPos;
memPos+=paddedLen;
}
sampleMemLen=memPos;
}
int DivPlatformSoundUnit::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
for (int i=0; i<8; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
su=new SoundUnit();
setFlags(flags);
reset();
return 6;
}
void DivPlatformSoundUnit::quit() {
for (int i=0; i<8; i++) {
delete oscBuf[i];
}
delete su;
}
DivPlatformSoundUnit::~DivPlatformSoundUnit() {
}
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