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furnace/src/engine/platform/c140.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 "c140.h"
#include "../engine.h"
#include "../../ta-log.h"
#include <math.h>
#include <map>
#define CHIP_FREQBASE 12582912
#define rWrite(a,v) {if(!skipRegisterWrites) {writes.push(QueuedWrite(a,v)); if(dumpWrites) addWrite(a,v); }}
const char* regCheatSheetC140[]={
"CHx_RVol", "00+x*10",
"CHx_LVol", "01+x*10",
"CHx_FreqH", "02+x*10",
"CHx_FreqL", "03+x*10",
"CHx_Bank", "04+x*10",
"CHx_Ctrl", "05+x*10",
"CHx_StartH", "06+x*10",
"CHx_StartL", "07+x*10",
"CHx_EndH", "08+x*10",
"CHx_EndL", "09+x*10",
"CHx_LoopH", "0A+x*10",
"CHx_LoopL", "0B+x*10",
"Timer", "1FA",
"IRQ", "1FE",
NULL
};
const char** DivPlatformC140::getRegisterSheet() {
return regCheatSheetC140;
}
void DivPlatformC140::acquire_219(short** buf, size_t len) {
for (size_t h=0; h<len; h++) {
while (!writes.empty()) {
QueuedWrite w=writes.front();
c219_write(&c219,w.addr,w.val);
regPool[w.addr&0x1ff]=w.val;
writes.pop();
}
c219_tick(&c219, 1);
// scale as 16bit
c219.lout >>= 10;
c219.rout >>= 10;
if (c219.lout<-32768) c219.lout=-32768;
if (c219.lout>32767) c219.lout=32767;
if (c219.rout<-32768) c219.rout=-32768;
if (c219.rout>32767) c219.rout=32767;
buf[0][h]=c219.lout;
buf[1][h]=c219.rout;
for (int i=0; i<totalChans; i++) {
oscBuf[i]->data[oscBuf[i]->needle++]=(c219.voice[i].lout+c219.voice[i].rout)>>10;
}
}
}
void DivPlatformC140::acquire_140(short** buf, size_t len) {
for (size_t h=0; h<len; h++) {
while (!writes.empty()) {
QueuedWrite w=writes.front();
c140_write(&c140,w.addr,w.val);
regPool[w.addr&0x1ff]=w.val;
writes.pop();
}
c140_tick(&c140, 1);
// scale as 16bit
c140.lout >>= 10;
c140.rout >>= 10;
if (c140.lout<-32768) c140.lout=-32768;
if (c140.lout>32767) c140.lout=32767;
if (c140.rout<-32768) c140.rout=-32768;
if (c140.rout>32767) c140.rout=32767;
buf[0][h]=c140.lout;
buf[1][h]=c140.rout;
for (int i=0; i<totalChans; i++) {
oscBuf[i]->data[oscBuf[i]->needle++]=(c140.voice[i].lout+c140.voice[i].rout)>>10;
}
}
}
void DivPlatformC140::acquire(short** buf, size_t len) {
if (is219) {
acquire_219(buf,len);
} else {
acquire_140(buf,len);
}
}
void DivPlatformC140::tick(bool sysTick) {
for (int i=0; i<totalChans; i++) {
chan[i].std.next();
if (chan[i].std.vol.had) {
chan[i].outVol=(chan[i].vol*MIN(chan[i].macroVolMul,chan[i].std.vol.val))/chan[i].macroVolMul;
chan[i].volChangedL=true;
chan[i].volChangedR=true;
}
if (NEW_ARP_STRAT) {
chan[i].handleArp();
} else if (chan[i].std.arp.had) {
if (!chan[i].inPorta) {
chan[i].baseFreq=NOTE_FREQUENCY(parent->calcArp(chan[i].note,chan[i].std.arp.val));
}
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.panL.had) {
chan[i].chPanL=(255*(chan[i].std.panL.val&255))/chan[i].macroPanMul;
chan[i].volChangedL=true;
}
if (chan[i].std.panR.had) {
chan[i].chPanR=(255*(chan[i].std.panR.val&255))/chan[i].macroPanMul;
chan[i].volChangedR=true;
}
if (chan[i].std.phaseReset.had) {
if ((chan[i].std.phaseReset.val==1) && chan[i].active) {
chan[i].audPos=0;
chan[i].setPos=true;
}
}
if (chan[i].volChangedL) {
chan[i].chVolL=(chan[i].outVol*chan[i].chPanL)/255;
rWrite(1+(i<<4),chan[i].chVolL);
chan[i].volChangedL=false;
}
if (chan[i].volChangedR) {
chan[i].chVolR=(chan[i].outVol*chan[i].chPanR)/255;
rWrite(0+(i<<4),chan[i].chVolR);
chan[i].volChangedR=false;
}
if (chan[i].setPos) {
// force keyon
chan[i].keyOn=true;
chan[i].setPos=false;
} else {
chan[i].audPos=0;
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
bool writeCtrl=false;
DivSample* s=parent->getSample(chan[i].sample);
unsigned char ctrl=0;
double off=(s->centerRate>=1)?((double)s->centerRate/8363.0):1.0;
chan[i].freq=(int)(off*parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,2,chan[i].pitch2,chipClock,CHIP_FREQBASE));
if (chan[i].freq<0) chan[i].freq=0;
if (chan[i].freq>65535) chan[i].freq=65535;
if (is219) {
ctrl|=(chan[i].active?0x80:0)|((s->isLoopable())?0x10:0)|((s->depth==DIV_SAMPLE_DEPTH_MULAW)?1:0);
} else {
ctrl|=(chan[i].active?0x80:0)|((s->isLoopable())?0x10:0)|((s->depth==DIV_SAMPLE_DEPTH_MULAW)?0x08:0);
}
if (chan[i].keyOn) {
unsigned int bank=0;
unsigned int start=0;
unsigned int loop=0;
unsigned int end=0;
if (chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
if (is219) {
bank=(sampleOff[chan[i].sample]>>16)&0xff;
start=sampleOff[chan[i].sample]&0xffff;
end=MIN(start+(s->length8>>1)-1,65535);
logV("sampleOff[%d]=%d",chan[i].sample,sampleOff[chan[i].sample]);
} else {
bank=(sampleOff[chan[i].sample]>>16)&0xff;
start=sampleOff[chan[i].sample]&0xffff;
end=MIN(start+s->length8-1,65535);
}
}
if (chan[i].audPos>0) {
start=MIN(start+(MIN(chan[i].audPos,s->length8)>>1),65535);
}
if (s->isLoopable()) {
if (is219) {
loop=MIN(start+(s->loopStart>>1),65535);
end=MIN(start+(s->loopEnd>>1)-1,65535);
} else {
loop=MIN(start+s->loopStart,65535);
end=MIN(start+s->loopEnd-1,65535);
}
}
rWrite(0x05+(i<<4),0); // force keyoff first
if (is219) {
// TODO; group banking
} else {
rWrite(0x04+(i<<4),bank);
}
rWrite(0x06+(i<<4),(start>>8)&0xff);
rWrite(0x07+(i<<4),start&0xff);
rWrite(0x08+(i<<4),(end>>8)&0xff);
rWrite(0x09+(i<<4),end&0xff);
rWrite(0x0a+(i<<4),(loop>>8)&0xff);
rWrite(0x0b+(i<<4),loop&0xff);
if (!chan[i].std.vol.had) {
chan[i].outVol=chan[i].vol;
chan[i].volChangedL=true;
chan[i].volChangedR=true;
}
writeCtrl=true;
chan[i].keyOn=false;
}
if (chan[i].keyOff) {
writeCtrl=true;
chan[i].keyOff=false;
}
if (chan[i].freqChanged) {
rWrite(0x02+(i<<4),chan[i].freq>>8);
rWrite(0x03+(i<<4),chan[i].freq&0xff);
chan[i].freqChanged=false;
}
if (writeCtrl) {
rWrite(0x05+(i<<4),ctrl);
}
}
}
}
int DivPlatformC140::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA);
chan[c.chan].macroVolMul=ins->type==DIV_INS_AMIGA?64:255;
chan[c.chan].macroPanMul=ins->type==DIV_INS_AMIGA?127:255;
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_FREQUENCY(c.value);
}
if (chan[c.chan].sample<0 || chan[c.chan].sample>=parent->song.sampleLen) {
chan[c.chan].sample=-1;
}
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
}
chan[c.chan].active=true;
chan[c.chan].keyOn=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].volChangedL=true;
chan[c.chan].volChangedR=true;
}
break;
}
case DIV_CMD_NOTE_OFF:
chan[c.chan].sample=-1;
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;
}
break;
case DIV_CMD_VOLUME:
chan[c.chan].vol=c.value;
if (!chan[c.chan].std.vol.has) {
chan[c.chan].outVol=c.value;
}
chan[c.chan].volChangedL=true;
chan[c.chan].volChangedR=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_PANNING:
chan[c.chan].chPanL=c.value;
chan[c.chan].chPanR=c.value2;
chan[c.chan].volChangedL=true;
chan[c.chan].volChangedR=true;
break;
case DIV_CMD_PITCH:
chan[c.chan].pitch=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=NOTE_FREQUENCY(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_LEGATO: {
chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val-12):(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_AMIGA));
}
if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will && !NEW_ARP_STRAT) chan[c.chan].baseFreq=NOTE_FREQUENCY(chan[c.chan].note);
chan[c.chan].inPorta=c.value;
break;
case DIV_CMD_SAMPLE_POS:
chan[c.chan].audPos=c.value;
chan[c.chan].setPos=true;
break;
case DIV_CMD_GET_VOLMAX:
return 255;
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 DivPlatformC140::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
if (is219) {
c219.voice[ch].muted=mute;
} else {
c140.voice[ch].muted=mute;
}
}
void DivPlatformC140::forceIns() {
for (int i=0; i<totalChans; i++) {
chan[i].insChanged=true;
chan[i].freqChanged=true;
chan[i].volChangedL=true;
chan[i].volChangedR=true;
chan[i].sample=-1;
}
}
void* DivPlatformC140::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformC140::getChanMacroInt(int ch) {
return &chan[ch].std;
}
unsigned short DivPlatformC140::getPan(int ch) {
return (chan[ch].chPanL<<8)|(chan[ch].chPanR);
}
DivDispatchOscBuffer* DivPlatformC140::getOscBuffer(int ch) {
return oscBuf[ch];
}
void DivPlatformC140::reset() {
while (!writes.empty()) writes.pop();
memset(regPool,0,512);
if (is219) {
c219_reset(&c219);
} else {
c140_reset(&c140);
}
for (int i=0; i<totalChans; i++) {
chan[i]=DivPlatformC140::Channel();
chan[i].std.setEngine(parent);
rWrite(0x05+(i<<4),0);
}
}
int DivPlatformC140::getOutputCount() {
return 2;
}
void DivPlatformC140::notifyInsChange(int ins) {
for (int i=0; i<totalChans; i++) {
if (chan[i].ins==ins) {
chan[i].insChanged=true;
}
}
}
void DivPlatformC140::notifyWaveChange(int wave) {
// TODO when wavetables are added
// TODO they probably won't be added unless the samples reside in RAM
}
void DivPlatformC140::notifyInsDeletion(void* ins) {
for (int i=0; i<totalChans; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformC140::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformC140::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
unsigned char* DivPlatformC140::getRegisterPool() {
return regPool;
}
int DivPlatformC140::getRegisterPoolSize() {
return 512;
}
float DivPlatformC140::getPostAmp() {
return 3.0f;
}
const void* DivPlatformC140::getSampleMem(int index) {
return index == 0 ? sampleMem : NULL;
}
size_t DivPlatformC140::getSampleMemCapacity(int index) {
return index == 0 ? 16777216 : 0;
}
size_t DivPlatformC140::getSampleMemUsage(int index) {
return index == 0 ? sampleMemLen : 0;
}
bool DivPlatformC140::isSampleLoaded(int index, int sample) {
if (index!=0) return false;
if (sample<0 || sample>255) return false;
return sampleLoaded[sample];
}
void DivPlatformC140::renderSamples(int sysID) {
memset(sampleMem,0,getSampleMemCapacity());
memset(sampleOff,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->renderOn[0][sysID]) {
sampleOff[i]=0;
continue;
}
if (is219) { // C219 (8-bit)
unsigned int length=s->length8;
// fit sample size to single bank size
if (length>131072) {
length=131072;
}
if (length&1) length++;
if ((memPos&0xfe0000)!=((memPos+length)&0xfe0000)) {
memPos=((memPos+0x1ffff)&0xfe0000);
}
if (memPos>=(getSampleMemCapacity())) {
logW("out of C219 memory for sample %d!",i);
break;
}
if (memPos+length>=(getSampleMemCapacity())) {
length=getSampleMemCapacity()-memPos;
logW("out of C219 memory for sample %d!",i);
}
if (s->depth==DIV_SAMPLE_DEPTH_MULAW) {
for (unsigned int i=0; i<length; i++) {
if (i>=s->lengthMuLaw) {
sampleMem[i+memPos]=0;
} else {
unsigned char x=s->dataMuLaw[i]^0xff;
sampleMem[i+memPos]=x;
}
}
} else {
for (unsigned int i=0; i<length; i++) {
if (i>=s->length8) {
sampleMem[memPos+i]=0;
} else {
sampleMem[memPos+i]=s->data8[i];
}
}
}
sampleOff[i]=memPos>>1;
sampleLoaded[i]=true;
memPos+=length;
} else { // C140 (16-bit)
unsigned int length=s->length16;
// fit sample size to single bank size
if (length>(131072)) {
length=131072;
}
if ((memPos&0xfe0000)!=((memPos+length)&0xfe0000)) {
memPos=((memPos+0x1ffff)&0xfe0000);
}
if (memPos>=(getSampleMemCapacity())) {
logW("out of C140 memory for sample %d!",i);
break;
}
// why is C140 not G.711-compliant? this weird bit mangling had me puzzled for 3 hours...
if (memPos+length>=(getSampleMemCapacity())) {
length=getSampleMemCapacity()-memPos;
logW("out of C140 memory for sample %d!",i);
}
if (s->depth==DIV_SAMPLE_DEPTH_MULAW) {
for (unsigned int i=0; i<length; i+=2) {
if ((i>>1)>=s->lengthMuLaw) break;
unsigned char x=s->dataMuLaw[i>>1]^0xff;
if (x&0x80) x^=15;
unsigned char c140Mu=(x&0x80)|((x&15)<<3)|((x&0x70)>>4);
sampleMem[i+memPos]=0;
sampleMem[1+i+memPos]=c140Mu;
}
} else {
memcpy(sampleMem+memPos,s->data16,length);
}
sampleOff[i]=memPos>>1;
sampleLoaded[i]=true;
memPos+=length;
}
}
sampleMemLen=memPos+256;
}
void DivPlatformC140::set219(bool is_219) {
is219=is_219;
totalChans=is219?16:24;
}
void DivPlatformC140::setFlags(const DivConfig& flags) {
chipClock=32000*256; // 8.192MHz and 12.288MHz input, verified from Assault Schematics
CHECK_CUSTOM_CLOCK;
rate=chipClock/192;
for (int i=0; i<totalChans; i++) {
oscBuf[i]->rate=rate;
}
}
int DivPlatformC140::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
for (int i=0; i<totalChans; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
sampleMem=new unsigned char[getSampleMemCapacity()];
sampleMemLen=0;
if (is219) {
c219_init(&c219);
c219.sample_mem=(signed char*)sampleMem;
} else {
c140_init(&c140);
c140.sample_mem=(short*)sampleMem;
}
setFlags(flags);
reset();
return totalChans;
}
void DivPlatformC140::quit() {
delete[] sampleMem;
for (int i=0; i<totalChans; i++) {
delete oscBuf[i];
}
}
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