furnace/src/engine/platform/dave.cpp
tildearrow a16d20e190 new chan osc, part 4
adapt dispatch code to it
2025-03-01 19:49:56 -05:00

642 lines
19 KiB
C++

/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2025 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 "dave.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 CHIP_DIVIDER 8
const char* regCheatSheetDave[]={
"Freq0", "00",
"Control0", "01",
"Freq1", "02",
"Control1", "03",
"Freq2", "04",
"Control2", "05",
"Control3", "06",
"SoundCtrl", "07",
"Vol0L", "08",
"Vol1L", "09",
"Vol2L", "0A",
"Vol3L", "0B",
"Vol0R", "0C",
"Vol1R", "0D",
"Vol2R", "0E",
"Vol3R", "0F",
"ClockDiv", "1F",
NULL
};
const unsigned char snapPeriodLong[15]={
0, 1, 3, 3, 3, 6, 6, 7, 7, 10, 10, 12, 12, 13, 13
};
const unsigned char snapPeriodShort[15]={
2, 2, 2, 2, 5, 5, 5, 8, 8, 8, 11, 11, 11, 11, 11
};
const unsigned char waveMap[8]={
0, 1, 1, 2, 3, 0, 0, 0
};
const char** DivPlatformDave::getRegisterSheet() {
return regCheatSheetDave;
}
void DivPlatformDave::acquire(short** buf, size_t len) {
for (int i=0; i<6; i++) {
oscBuf[i]->begin(len);
}
for (size_t h=0; h<len; h++) {
for (int i=4; i<6; i++) {
if (chan[i].dacSample!=-1) {
chan[i].dacPeriod+=chan[i].dacRate;
while (chan[i].dacPeriod>rate) {
DivSample* s=parent->getSample(chan[i].dacSample);
if (s->samples<=0 || chan[i].dacPos>=s->samples) {
chan[i].dacSample=-1;
writeControl=true;
chan[0].writeVol=true;
chan[i].dacPeriod-=rate;
continue;
}
signed char dacData=(s->data8[chan[i].dacPos]*chan[i].outVol)>>8;
chan[i].dacOut=dacData+32;
chan[i].dacPos++;
if (!isMuted[i]) {
rWrite(8+((i-4)<<2),chan[i].dacOut&0x3f);
}
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;
writeControl=true;
chan[0].writeVol=true;
}
chan[i].dacPeriod-=rate;
}
}
}
if (!writes.empty()) {
QueuedWrite w=writes.front();
dave->writePort(w.addr,w.val);
regPool[w.addr&0x1f]=w.val;
writes.pop();
}
unsigned int next=dave->runOneCycle();
unsigned short nextL=next&0xffff;
unsigned short nextR=next>>16;
if ((regPool[7]&0x18)==0x18) {
oscBuf[0]->putSample(h,0);
oscBuf[1]->putSample(h,0);
oscBuf[2]->putSample(h,0);
oscBuf[3]->putSample(h,0);
oscBuf[4]->putSample(h,dave->chn0_left<<9);
oscBuf[5]->putSample(h,dave->chn0_right<<9);
} else if (regPool[7]&0x08) {
oscBuf[0]->putSample(h,dave->chn0_state?(dave->chn0_right<<8):0);
oscBuf[1]->putSample(h,dave->chn1_state?(dave->chn1_right<<8):0);
oscBuf[2]->putSample(h,dave->chn2_state?(dave->chn2_right<<8):0);
oscBuf[3]->putSample(h,dave->chn3_state?(dave->chn3_right<<8):0);
oscBuf[4]->putSample(h,dave->chn0_left<<9);
oscBuf[5]->putSample(h,0);
} else if (regPool[7]&0x10) {
oscBuf[0]->putSample(h,dave->chn0_state?(dave->chn0_left<<8):0);
oscBuf[1]->putSample(h,dave->chn1_state?(dave->chn1_left<<8):0);
oscBuf[2]->putSample(h,dave->chn2_state?(dave->chn2_left<<8):0);
oscBuf[3]->putSample(h,dave->chn3_state?(dave->chn3_left<<8):0);
oscBuf[4]->putSample(h,0);
oscBuf[5]->putSample(h,dave->chn0_right<<9);
} else {
oscBuf[0]->putSample(h,dave->chn0_state?((dave->chn0_left+dave->chn0_right)<<8):0);
oscBuf[1]->putSample(h,dave->chn1_state?((dave->chn1_left+dave->chn1_right)<<8):0);
oscBuf[2]->putSample(h,dave->chn2_state?((dave->chn2_left+dave->chn2_right)<<8):0);
oscBuf[3]->putSample(h,dave->chn3_state?((dave->chn3_left+dave->chn3_right)<<8):0);
oscBuf[4]->putSample(h,0);
oscBuf[5]->putSample(h,0);
}
buf[0][h]=(short)nextL;
buf[1][h]=(short)nextR;
}
for (int i=0; i<6; i++) {
oscBuf[i]->end(len);
}
}
void DivPlatformDave::tick(bool sysTick) {
for (int i=0; i<6; i++) {
chan[i].std.next();
if (chan[i].std.vol.had) {
chan[i].outVol=VOL_SCALE_LINEAR(chan[i].vol&63,MIN(63,chan[i].std.vol.val),63);
chan[i].writeVol=true;
}
if (chan[i].std.duty.had) {
chan[i].noiseFreq=chan[i].std.duty.val&3;
chan[i].freqChanged=true;
}
if (NEW_ARP_STRAT) {
chan[i].handleArp();
} else if (chan[i].std.arp.had) {
if (!chan[i].inPorta) {
if (i>=4) {
chan[i].baseFreq=parent->calcBaseFreq(1,1,parent->calcArp(chan[i].note,chan[i].std.arp.val),false);
} else {
chan[i].baseFreq=NOTE_PERIODIC(parent->calcArp(chan[i].note,chan[i].std.arp.val));
}
}
chan[i].freqChanged=true;
}
if (chan[i].std.wave.had) {
chan[i].wave=chan[i].std.wave.val&7;
if (i==3 && chan[i].wave>3) chan[i].wave=3;
chan[i].freqChanged=true;
}
if (chan[i].std.panL.had) {
chan[i].panL=chan[i].std.panL.val&63;
}
if (chan[i].std.panR.had) {
chan[i].panR=chan[i].std.panR.val&63;
}
if (chan[i].std.panL.had || chan[i].std.panR.had) {
chan[i].writeVol=true;
}
if (chan[i].std.ex1.had) {
chan[i].highPass=chan[i].std.ex1.val&1;
chan[i].ringMod=chan[i].std.ex1.val&2;
chan[i].swapCounters=chan[i].std.ex1.val&4;
chan[i].lowPass=chan[i].std.ex1.val&8;
chan[i].freqChanged=true;
}
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 (i>=4) {
if (chan[i].active && chan[i].dacSample>=0 && chan[i].dacSample<parent->song.sampleLen) {
if (chan[i].setPos) {
chan[i].setPos=false;
} else {
chan[i].dacPos=0;
}
chan[i].dacPeriod=0;
chan[i].keyOn=true;
}
} else {
chan[i].resetPhase=true;
writeControl=true;
}
}
if (chan[i].writeVol) {
if (i<4) {
if (chan[i].active && !isMuted[i]) {
if (i!=0 || chan[4].dacSample<0 || isMuted[4]) {
rWrite(8+i,(63+chan[i].outVol*chan[i].panL)>>6);
}
if (i!=0 || chan[5].dacSample<0 || isMuted[5]) {
rWrite(12+i,(63+chan[i].outVol*chan[i].panR)>>6);
}
} else {
if (i!=0 || chan[4].dacSample<0 || isMuted[4]) {
rWrite(8+i,0);
}
if (i!=0 || chan[5].dacSample<0 || isMuted[5]) {
rWrite(12+i,0);
}
}
}
chan[i].writeVol=false;
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
if (i>=4) {
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,0,chan[i].pitch2,1,1);
double off=1.0;
if (chan[i].dacSample>=0 && chan[i].dacSample<parent->song.sampleLen) {
DivSample* s=parent->getSample(chan[i].dacSample);
off=(double)s->centerRate/parent->getCenterRate();
}
chan[i].dacRate=chan[i].freq*off;
} else {
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 (i<3) {
switch (chan[i].wave) {
case 0:
chan[i].freq>>=2;
break;
case 1:
chan[i].freq/=5;
chan[i].freq>>=1;
break;
case 2:
chan[i].freq/=15;
chan[i].freq>>=1;
break;
case 3:
chan[i].freq/=63;
break;
case 4:
chan[i].freq>>=5;
break;
}
}
if (i<4) {
if (chan[i].freq<1) chan[i].freq=1;
if (chan[i].freq>4095) chan[i].freq=4095;
}
if (i<3) {
if (chan[i].wave==1) { // short 1
chan[i].freq=15*(chan[i].freq/15)+snapPeriodShort[(chan[i].freq%15)];
} else if (chan[i].wave==2) { // long 1
chan[i].freq=15*(chan[i].freq/15)+snapPeriodLong[(chan[i].freq%15)];
} else if (chan[i].wave==3) { // long 2 (30, 61, 92, 123... result in silence)
if ((chan[i].freq%30)==(chan[i].freq/30)-1) chan[i].freq++;
}
rWrite((i<<1),chan[i].freq&0xff);
rWrite(1+(i<<1),(chan[i].freq>>8)|((waveMap[chan[i].wave])<<4)|(chan[i].highPass?0x40:0)|(chan[i].ringMod?0x80:0));
} else if (i==3) {
rWrite(6,(chan[i].noiseFreq&3)|((chan[i].wave&3)<<2)|(chan[i].swapCounters?0x10:0)|(chan[i].lowPass?0x20:0)|(chan[i].highPass?0x40:0)|(chan[i].ringMod?0x80:0));
}
if (chan[i].keyOn) chan[i].keyOn=false;
if (chan[i].keyOff) chan[i].keyOff=false;
chan[i].freqChanged=false;
}
}
if (writeControl) {
rWrite(7,(chan[0].resetPhase?1:0)|(chan[1].resetPhase?2:0)|(chan[2].resetPhase?4:0)|((chan[4].dacSample>=0 && !isMuted[4])?8:0)|((chan[5].dacSample>=0 && !isMuted[5])?16:0));
rWrite(7,((chan[4].dacSample>=0 && !isMuted[4])?8:0)|((chan[5].dacSample>=0 && !isMuted[5])?16:0));
chan[0].resetPhase=false;
chan[1].resetPhase=false;
chan[2].resetPhase=false;
chan[3].resetPhase=false;
writeControl=false;
}
}
int DivPlatformDave::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=NULL;
// DAC
if (c.chan>=4) {
ins=parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA);
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].dacSample=ins->amiga.getSample(c.value);
chan[c.chan].sampleNote=c.value;
c.value=ins->amiga.getFreq(c.value);
chan[c.chan].sampleNoteDelta=c.value-chan[c.chan].sampleNote;
} else if (chan[c.chan].sampleNote!=DIV_NOTE_NULL) {
chan[c.chan].dacSample=ins->amiga.getSample(chan[c.chan].sampleNote);
c.value=ins->amiga.getFreq(chan[c.chan].sampleNote);
}
if (chan[c.chan].dacSample<0 || chan[c.chan].dacSample>=parent->song.sampleLen) {
chan[c.chan].dacSample=-1;
chan[0].writeVol=true;
}
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=parent->calcBaseFreq(1,1,c.value,false);
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
}
if (chan[c.chan].setPos) {
chan[c.chan].setPos=false;
} else {
chan[c.chan].dacPos=0;
}
chan[c.chan].dacPeriod=0;
writeControl=true;
} else {
ins=parent->getIns(chan[c.chan].ins,DIV_INS_DAVE);
chan[c.chan].sampleNote=DIV_NOTE_NULL;
chan[c.chan].sampleNoteDelta=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].keyOn=true;
chan[c.chan].writeVol=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].insChanged=false;
break;
}
case DIV_CMD_NOTE_OFF:
chan[c.chan].active=false;
chan[c.chan].keyOff=true;
chan[c.chan].writeVol=true;
if (c.chan>=4) {
chan[c.chan].dacSample=-1;
chan[0].writeVol=true;
writeControl=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].writeVol=true;
}
}
}
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;
if (chan[c.chan].wave>4) chan[c.chan].wave=4;
if (c.chan==3 && chan[c.chan].wave>3) chan[c.chan].wave=3;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_STD_NOISE_MODE:
chan[c.chan].noiseFreq=c.value&3;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_DAVE_HIGH_PASS:
chan[c.chan].highPass=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_DAVE_RING_MOD:
chan[c.chan].ringMod=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_DAVE_SWAP_COUNTERS:
chan[c.chan].swapCounters=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_DAVE_LOW_PASS:
chan[c.chan].lowPass=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_DAVE_CLOCK_DIV:
clockDiv=c.value;
rWrite(31,clockDiv?2:0);
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=NOTE_PERIODIC(c.value2+chan[c.chan].sampleNoteDelta);
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_PANNING: {
chan[c.chan].panL=c.value>>2;
chan[c.chan].panR=c.value2>>2;
break;
}
case DIV_CMD_LEGATO:
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value+chan[c.chan].sampleNoteDelta);
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_DAVE));
}
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_SAMPLE_POS:
if (c.chan<4) break;
chan[c.chan].dacPos=c.value;
chan[c.chan].setPos=true;
break;
case DIV_CMD_GET_VOLMAX:
return 63;
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_CMD_MACRO_RESTART:
chan[c.chan].std.restart(c.value);
break;
default:
break;
}
return 1;
}
void DivPlatformDave::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
chan[ch].writeVol=true;
if (ch>=4) {
chan[0].writeVol=true;
writeControl=true;
}
}
void DivPlatformDave::forceIns() {
for (int i=0; i<6; i++) {
chan[i].insChanged=true;
chan[i].freqChanged=true;
chan[i].writeVol=true;
}
writeControl=true;
rWrite(31,clockDiv?2:0);
}
void* DivPlatformDave::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformDave::getChanMacroInt(int ch) {
return &chan[ch].std;
}
unsigned short DivPlatformDave::getPan(int ch) {
if (ch==5) return 1;
if (ch==4) return 0x100;
return (chan[ch].panL<<8)|chan[ch].panR;
}
void DivPlatformDave::getPaired(int ch, std::vector<DivChannelPair>& ret) {
if (chan[ch].highPass) {
ret.push_back(DivChannelPair(_("high"),(ch+1)&3));
}
if (chan[ch].ringMod) {
ret.push_back(DivChannelPair(_("ring"),(ch+2)&3));
}
if (chan[ch].lowPass && ch==3) {
ret.push_back(DivChannelPair(_("low"),2));
}
}
DivChannelModeHints DivPlatformDave::getModeHints(int ch) {
DivChannelModeHints ret;
return ret;
}
DivSamplePos DivPlatformDave::getSamplePos(int ch) {
if (ch<4 || ch>=6) return DivSamplePos();
return DivSamplePos(
chan[ch].dacSample,
chan[ch].dacPos,
chan[ch].dacRate
);
}
DivDispatchOscBuffer* DivPlatformDave::getOscBuffer(int ch) {
return oscBuf[ch];
}
unsigned char* DivPlatformDave::getRegisterPool() {
return regPool;
}
int DivPlatformDave::getRegisterPoolSize() {
return 32;
}
void DivPlatformDave::reset() {
writes.clear();
memset(regPool,0,32);
for (int i=0; i<6; i++) {
chan[i]=DivPlatformDave::Channel();
chan[i].std.setEngine(parent);
}
if (dumpWrites) {
addWrite(0xffffffff,0);
}
writeControl=false;
clockDiv=false;
dave->reset(true);
}
int DivPlatformDave::getOutputCount() {
return 2;
}
bool DivPlatformDave::keyOffAffectsArp(int ch) {
return true;
}
void DivPlatformDave::notifyInsDeletion(void* ins) {
for (int i=0; i<6; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformDave::setFlags(const DivConfig& flags) {
chipClock=8000000.0;
CHECK_CUSTOM_CLOCK;
rate=chipClock/16;
for (int i=0; i<6; i++) {
oscBuf[i]->setRate(rate);
}
}
void DivPlatformDave::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformDave::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
int DivPlatformDave::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
dave=new Ep128::Dave;
for (int i=0; i<6; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
setFlags(flags);
reset();
return 6;
}
void DivPlatformDave::quit() {
for (int i=0; i<6; i++) {
delete oscBuf[i];
}
delete dave;
}
DivPlatformDave::~DivPlatformDave() {
}