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furnace/src/engine/platform/mmc5.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 "mmc5.h"
#include "sound/nes/mmc5.h"
#include "../engine.h"
#include <math.h>
#define CHIP_DIVIDER 16
#define rWrite(a,v) if (!skipRegisterWrites) {extcl_cpu_wr_mem_MMC5(mmc5,a,v); regPool[(a)&0x7f]=v; if (dumpWrites) {addWrite(a,v);} }
const char* regCheatSheetMMC5[]={
"S0Volume", "5000",
"S0PeriodL", "5002",
"S0PeriodH", "5003",
"S1Volume", "5004",
"S1PeriodL", "5006",
"S1PeriodH", "5007",
"PCMControl", "4010",
"PCMWrite", "4011",
"APUControl", "4015",
NULL
};
const char** DivPlatformMMC5::getRegisterSheet() {
return regCheatSheetMMC5;
}
void DivPlatformMMC5::acquire(short** buf, size_t len) {
for (size_t i=0; i<len; i++) {
if (dacSample!=-1) {
dacPeriod+=dacRate;
if (dacPeriod>=rate) {
DivSample* s=parent->getSample(dacSample);
if (s->samples>0) {
if (!isMuted[2]) {
rWrite(0x5011,((unsigned char)s->data8[dacPos]+0x80));
}
dacPos++;
if (s->isLoopable() && dacPos>=(unsigned int)s->loopEnd) {
dacPos=s->loopStart;
} else if (dacPos>=s->samples) {
dacSample=-1;
}
dacPeriod-=rate;
} else {
dacSample=-1;
}
}
}
extcl_envelope_clock_MMC5(mmc5);
extcl_length_clock_MMC5(mmc5);
extcl_apu_tick_MMC5(mmc5);
if (mmc5->clocked) {
mmc5->clocked=false;
}
int sample=isMuted[0]?0:(mmc5->S3.output*10);
if (!isMuted[1]) {
sample+=mmc5->S4.output*10;
}
if (!isMuted[2]) {
sample+=mmc5->pcm.output*2;
}
if (sample>32767) sample=32767;
if (sample<-32768) sample=-32768;
buf[0][i]=sample;
if (++writeOscBuf>=32) {
writeOscBuf=0;
oscBuf[0]->data[oscBuf[0]->needle++]=isMuted[0]?0:((mmc5->S3.output*10)<<7);
oscBuf[1]->data[oscBuf[1]->needle++]=isMuted[1]?0:((mmc5->S4.output*10)<<7);
oscBuf[2]->data[oscBuf[2]->needle++]=isMuted[2]?0:((mmc5->pcm.output*2)<<6);
}
}
}
void DivPlatformMMC5::tick(bool sysTick) {
for (int i=0; i<2; i++) {
chan[i].std.next();
if (chan[i].std.vol.had) {
// ok, why are the volumes like that?
chan[i].outVol=VOL_SCALE_LINEAR_BROKEN(chan[i].vol&15,MIN(15,chan[i].std.vol.val),15);
if (chan[i].outVol<0) chan[i].outVol=0;
rWrite(0x5000+i*4,0x30|chan[i].outVol|((chan[i].duty&3)<<6));
}
// TODO: arp macros on NES PCM?
if (NEW_ARP_STRAT) {
chan[i].handleArp();
} else if (chan[i].std.arp.had) {
if (!chan[i].inPorta) {
chan[i].baseFreq=NOTE_PERIODIC(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;
rWrite(0x5000+i*4,0x30|chan[i].outVol|((chan[i].duty&3)<<6));
}
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) {
if (chan[i].std.phaseReset.val==1) {
chan[i].freqChanged=true;
chan[i].prevFreq=-1;
}
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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)-1;
if (chan[i].freq>2047) chan[i].freq=2047;
if (chan[i].freq<0) chan[i].freq=0;
if (chan[i].keyOn) {
//rWrite(16+i*5+1,((chan[i].duty&3)<<6)|(63-(ins->gb.soundLen&63)));
//rWrite(16+i*5+2,((chan[i].vol<<4))|(ins->gb.envLen&7)|((ins->gb.envDir&1)<<3));
}
if (chan[i].keyOff) {
//rWrite(16+i*5+2,8);
rWrite(0x5000+i*4,0x30);
}
rWrite(0x5002+i*4,chan[i].freq&0xff);
if ((chan[i].prevFreq>>8)!=(chan[i].freq>>8)) {
rWrite(0x5003+i*4,0xf8|(chan[i].freq>>8));
}
if (chan[i].freq!=65535 && chan[i].freq!=0) {
chan[i].prevFreq=chan[i].freq;
}
if (chan[i].keyOn) chan[i].keyOn=false;
if (chan[i].keyOff) chan[i].keyOff=false;
chan[i].freqChanged=false;
}
}
// PCM
if (chan[2].freqChanged) {
chan[2].freq=parent->calcFreq(chan[2].baseFreq,chan[2].pitch,chan[2].fixedArp?chan[2].baseNoteOverride:chan[2].arpOff,chan[2].fixedArp,false,0,chan[2].pitch2,1,1);
if (chan[2].furnaceDac) {
double off=1.0;
if (dacSample>=0 && dacSample<parent->song.sampleLen) {
DivSample* s=parent->getSample(dacSample);
off=(double)s->centerRate/8363.0;
}
dacRate=MIN(chan[2].freq*off,32000);
if (dumpWrites) addWrite(0xffff0001,dacRate);
}
chan[2].freqChanged=false;
}
}
int DivPlatformMMC5::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON:
if (c.chan==2) { // PCM
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_STD);
if (ins->type==DIV_INS_AMIGA) {
if (c.value!=DIV_NOTE_NULL) dacSample=ins->amiga.getSample(c.value);
if (dacSample<0 || dacSample>=parent->song.sampleLen) {
dacSample=-1;
if (dumpWrites) addWrite(0xffff0002,0);
break;
} else {
if (dumpWrites) addWrite(0xffff0000,dacSample);
}
dacPos=0;
dacPeriod=0;
chan[c.chan].baseFreq=parent->calcBaseFreq(1,1,c.value,false);
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].furnaceDac=true;
} else {
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].note=c.value;
}
dacSample=12*sampleBank+chan[c.chan].note%12;
if (dacSample>=parent->song.sampleLen) {
dacSample=-1;
if (dumpWrites) addWrite(0xffff0002,0);
break;
} else {
if (dumpWrites) addWrite(0xffff0000,dacSample);
}
dacPos=0;
dacPeriod=0;
dacRate=parent->getSample(dacSample)->rate;
if (dumpWrites) addWrite(0xffff0001,dacRate);
chan[c.chan].furnaceDac=false;
}
break;
} else {
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
}
}
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(parent->getIns(chan[c.chan].ins,DIV_INS_STD));
if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
chan[c.chan].outVol=chan[c.chan].vol;
}
rWrite(0x5000+c.chan*4,0x30|chan[c.chan].vol|((chan[c.chan].duty&3)<<6));
break;
case DIV_CMD_NOTE_OFF:
if (c.chan==2) {
dacSample=-1;
if (dumpWrites) addWrite(0xffff0002,0);
}
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:
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) {
rWrite(0x5000+c.chan*4,0x30|chan[c.chan].vol|((chan[c.chan].duty&3)<<6));
}
}
break;
case DIV_CMD_GET_VOLUME:
return chan[c.chan].vol;
break;
case DIV_CMD_PITCH:
chan[c.chan].pitch=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=(c.chan==2)?(parent->calcBaseFreq(1,1,c.value2,false)):(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].duty=c.value;
rWrite(0x5000+c.chan*4,0x30|(chan[c.chan].active?chan[c.chan].outVol:0)|((chan[c.chan].duty&3)<<6));
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_LEGATO:
if (c.chan==2) {
chan[c.chan].baseFreq=parent->calcBaseFreq(1,1,c.value+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val):(0)),false);
} else {
chan[c.chan].baseFreq=NOTE_PERIODIC(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_STD));
}
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_GET_VOLMAX:
return 15;
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 DivPlatformMMC5::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
}
void DivPlatformMMC5::forceIns() {
for (int i=0; i<3; i++) {
chan[i].insChanged=true;
chan[i].prevFreq=65535;
}
}
void* DivPlatformMMC5::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformMMC5::getChanMacroInt(int ch) {
return &chan[ch].std;
}
DivDispatchOscBuffer* DivPlatformMMC5::getOscBuffer(int ch) {
return oscBuf[ch];
}
unsigned char* DivPlatformMMC5::getRegisterPool() {
return regPool;
}
int DivPlatformMMC5::getRegisterPoolSize() {
return 32;
}
float DivPlatformMMC5::getPostAmp() {
return 64.0f;
}
void DivPlatformMMC5::reset() {
for (int i=0; i<3; i++) {
chan[i]=DivPlatformMMC5::Channel();
chan[i].std.setEngine(parent);
}
if (dumpWrites) {
addWrite(0xffffffff,0);
}
dacPeriod=0;
dacPos=0;
dacRate=0;
dacSample=-1;
sampleBank=0;
map_init_MMC5(mmc5);
memset(regPool,0,128);
rWrite(0x5015,0x03);
rWrite(0x5010,0x00);
}
bool DivPlatformMMC5::keyOffAffectsArp(int ch) {
return true;
}
void DivPlatformMMC5::setFlags(const DivConfig& flags) {
int clockSel=flags.getInt("clockSel",0);
if (clockSel==2) { // Dendy
chipClock=COLOR_PAL*2.0/5.0;
} else if (clockSel==1) { // PAL
chipClock=COLOR_PAL*3.0/8.0;
} else { // NTSC
chipClock=COLOR_NTSC/2.0;
}
CHECK_CUSTOM_CLOCK;
rate=chipClock;
for (int i=0; i<3; i++) {
oscBuf[i]->rate=rate/32;
}
}
void DivPlatformMMC5::notifyInsDeletion(void* ins) {
for (int i=0; i<3; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformMMC5::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformMMC5::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
int DivPlatformMMC5::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
writeOscBuf=0;
mmc5=new struct _mmc5;
for (int i=0; i<3; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
//mmc5->muted[i]=false; // TODO
}
setFlags(flags);
init_nla_table(500,500);
reset();
return 5;
}
void DivPlatformMMC5::quit() {
for (int i=0; i<3; i++) {
delete oscBuf[i];
}
delete mmc5;
}
DivPlatformMMC5::~DivPlatformMMC5() {
}
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