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furnace/src/engine/platform/nes.cpp

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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 "nes.h"
#include "sound/nes/cpu_inline.h"
#include "../engine.h"
#include "../../ta-log.h"
#include <stddef.h>
#include <math.h>
struct _nla_table nla_table;
#define CHIP_DIVIDER 16
#define rWrite(a,v) if (!skipRegisterWrites) {doWrite(a,v); regPool[(a)&0x7f]=v; if (dumpWrites) {addWrite(a,v);} }
const char* regCheatSheetNES[]={
"S0Volume", "4000",
"S0Sweep", "4001",
"S0PeriodL", "4002",
"S0PeriodH", "4003",
"S1Volume", "4004",
"S1Sweep", "4005",
"S1PeriodL", "4006",
"S1PeriodH", "4007",
"TRVolume", "4008",
"TRPeriodL", "400A",
"TRPeriodH", "400B",
"NSVolume", "400C",
"NSPeriod", "400E",
"NSLength", "400F",
"DMCControl", "4010",
"DMCLoad", "4011",
"DMCAddr", "4012",
"DMCLength", "4013",
"APUControl", "4015",
"APUFrameCtl", "4017",
NULL
};
unsigned char _readDMC(void* user, unsigned short addr) {
return ((DivPlatformNES*)user)->readDMC(addr);
}
const char** DivPlatformNES::getRegisterSheet() {
return regCheatSheetNES;
}
void DivPlatformNES::doWrite(unsigned short addr, unsigned char data) {
if (useNP) {
nes1_NP->Write(addr,data);
nes2_NP->Write(addr,data);
} else {
apu_wr_reg(nes,addr,data);
}
}
#define doPCM \
if (!dpcmMode && dacSample!=-1) { \
dacPeriod+=dacRate; \
if (dacPeriod>=rate) { \
DivSample* s=parent->getSample(dacSample); \
if (s->samples>0) { \
if (!isMuted[4]) { \
unsigned char next=((unsigned char)s->data8[dacPos]+0x80)>>1; \
if (dacAntiClickOn && dacAntiClick<next) { \
dacAntiClick+=8; \
rWrite(0x4011,dacAntiClick); \
} else { \
dacAntiClickOn=false; \
rWrite(0x4011,next); \
} \
} \
dacPos++; \
if (s->isLoopable() && dacPos>=(unsigned int)s->loopEnd) { \
dacPos=s->loopStart; \
} else if (dacPos>=s->samples) { \
dacSample=-1; \
} \
dacPeriod-=rate; \
} else { \
dacSample=-1; \
} \
} \
}
void DivPlatformNES::acquire_puNES(short** buf, size_t len) {
for (size_t i=0; i<len; i++) {
doPCM;
apu_tick(nes,NULL);
nes->apu.odd_cycle=!nes->apu.odd_cycle;
if (nes->apu.clocked) {
nes->apu.clocked=false;
}
int sample=(pulse_output(nes)+tnd_output(nes))<<6;
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:(nes->S1.output<<11);
oscBuf[1]->data[oscBuf[1]->needle++]=isMuted[1]?0:(nes->S2.output<<11);
oscBuf[2]->data[oscBuf[2]->needle++]=isMuted[2]?0:(nes->TR.output<<11);
oscBuf[3]->data[oscBuf[3]->needle++]=isMuted[3]?0:(nes->NS.output<<11);
oscBuf[4]->data[oscBuf[4]->needle++]=isMuted[4]?0:(nes->DMC.output<<8);
}
}
}
void DivPlatformNES::acquire_NSFPlay(short** buf, size_t len) {
int out1[2];
int out2[2];
for (size_t i=0; i<len; i++) {
doPCM;
nes1_NP->Tick(1);
nes2_NP->TickFrameSequence(1);
nes2_NP->Tick(1);
nes1_NP->Render(out1);
nes2_NP->Render(out2);
int sample=(out1[0]+out1[1]+out2[0]+out2[1])<<1;
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++]=nes1_NP->out[0]<<11;
oscBuf[1]->data[oscBuf[1]->needle++]=nes1_NP->out[1]<<11;
oscBuf[2]->data[oscBuf[2]->needle++]=nes2_NP->out[0]<<11;
oscBuf[3]->data[oscBuf[3]->needle++]=nes2_NP->out[1]<<11;
oscBuf[4]->data[oscBuf[4]->needle++]=nes2_NP->out[2]<<8;
}
}
}
void DivPlatformNES::acquire(short** buf, size_t len) {
if (useNP) {
acquire_NSFPlay(buf,len);
} else {
acquire_puNES(buf,len);
}
}
static unsigned char noiseTable[253]={
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4,
15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4,
15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4,
3, 2, 1, 0, 11, 10, 9, 8, 7, 6, 5, 4,
15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4,
3, 2, 1, 0, 11, 10, 9, 8, 7, 6, 5, 4,
15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4,
3, 2, 1, 0, 11, 10, 9, 8, 7, 6, 5, 4,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
15
};
unsigned char DivPlatformNES::calcDPCMRate(int inRate) {
if (inRate<4450) return 0;
if (inRate<5000) return 1;
if (inRate<5400) return 2;
if (inRate<5900) return 3;
if (inRate<6650) return 4;
if (inRate<7450) return 5;
if (inRate<8100) return 6;
if (inRate<8800) return 7;
if (inRate<10200) return 8;
if (inRate<11700) return 9;
if (inRate<13300) return 10;
if (inRate<15900) return 11;
if (inRate<18900) return 12;
if (inRate<23500) return 13;
if (inRate<29000) return 14;
return 15;
}
void DivPlatformNES::tick(bool sysTick) {
for (int i=0; i<4; 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;
if (i==2) { // triangle
rWrite(0x4000+i*4,(chan[i].outVol==0)?0:255);
chan[i].freqChanged=true;
} else {
rWrite(0x4000+i*4,(chan[i].envMode<<4)|chan[i].outVol|((chan[i].duty&3)<<6));
}
}
if (NEW_ARP_STRAT) {
chan[i].handleArp();
} else if (chan[i].std.arp.had) {
if (i==3) { // noise
chan[i].baseFreq=parent->calcArp(chan[i].note,chan[i].std.arp.val);
if (chan[i].baseFreq>255) chan[i].baseFreq=255;
if (chan[i].baseFreq<0) chan[i].baseFreq=0;
} else {
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;
if (i==3) {
if (parent->song.properNoiseLayout) {
chan[i].duty&=1;
} else if (chan[i].duty>1) {
chan[i].duty=1;
}
}
if (i!=2) {
rWrite(0x4000+i*4,(chan[i].envMode<<4)|chan[i].outVol|((chan[i].duty&3)<<6));
}
if (i==3) { // noise
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].sweepChanged) {
chan[i].sweepChanged=false;
if (i==0) {
//rWrite(16+i*5,chan[i].sweep);
}
}
if (i<2) 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) {
if (i==3) { // noise
int ntPos=chan[i].baseFreq;
if (NEW_ARP_STRAT) {
if (chan[i].fixedArp) {
ntPos=chan[i].baseNoteOverride;
} else {
ntPos+=chan[i].arpOff;
}
}
ntPos+=chan[i].pitch2;
if (parent->song.properNoiseLayout) {
chan[i].freq=15-(ntPos&15);
} else {
if (ntPos<0) ntPos=0;
if (ntPos>252) ntPos=252;
chan[i].freq=noiseTable[ntPos];
}
} 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)-1;
if (chan[i].freq>2047) chan[i].freq=2047;
if (chan[i].freq<0) chan[i].freq=0;
}
if (chan[i].keyOn) {
}
if (chan[i].keyOff) {
//rWrite(16+i*5+2,8);
if (i==2) { // triangle
rWrite(0x4000+i*4,0x00);
} else {
rWrite(0x4000+i*4,0x30);
}
}
if (i==3) { // noise
rWrite(0x4002+i*4,(chan[i].duty<<7)|chan[i].freq);
rWrite(0x4003+i*4,(chan[i].len<<3));
} else {
rWrite(0x4002+i*4,chan[i].freq&0xff);
if ((chan[i].prevFreq>>8)!=(chan[i].freq>>8) || i==2) {
rWrite(0x4003+i*4,(chan[i].len<<3)|(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[4].freqChanged || chan[4].keyOn) {
chan[4].freq=parent->calcFreq(chan[4].baseFreq,chan[4].pitch,chan[4].fixedArp?chan[4].baseNoteOverride:chan[4].arpOff,chan[4].fixedArp,false);
if (chan[4].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[4].freq*off,32000);
if (chan[4].keyOn) {
if (dpcmMode && !skipRegisterWrites && dacSample>=0 && dacSample<parent->song.sampleLen) {
unsigned int dpcmAddr=sampleOffDPCM[dacSample];
unsigned int dpcmLen=(parent->getSample(dacSample)->lengthDPCM+15)>>4;
if (dpcmLen>255) dpcmLen=255;
goingToLoop=parent->getSample(dacSample)->isLoopable();
// write DPCM
rWrite(0x4015,15);
rWrite(0x4010,calcDPCMRate(dacRate)|(goingToLoop?0x40:0));
rWrite(0x4012,(dpcmAddr>>6)&0xff);
rWrite(0x4013,dpcmLen&0xff);
rWrite(0x4015,31);
dpcmBank=dpcmAddr>>14;
}
} else {
if (dpcmMode) {
rWrite(0x4010,calcDPCMRate(dacRate)|(goingToLoop?0x40:0));
}
}
if (dumpWrites && !dpcmMode) addWrite(0xffff0001,dacRate);
}
if (chan[4].keyOn) chan[4].keyOn=false;
chan[4].freqChanged=false;
}
}
int DivPlatformNES::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON:
if (c.chan==4) { // 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 && !dpcmMode) addWrite(0xffff0002,0);
break;
} else {
if (dumpWrites && !dpcmMode) addWrite(0xffff0000,dacSample);
}
dacPos=0;
dacPeriod=0;
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;
}
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 && !dpcmMode) addWrite(0xffff0002,0);
break;
} else {
if (dumpWrites && !dpcmMode) addWrite(0xffff0000,dacSample);
}
dacPos=0;
dacPeriod=0;
dacRate=parent->getSample(dacSample)->rate;
if (dumpWrites && !dpcmMode) addWrite(0xffff0001,dacRate);
chan[c.chan].furnaceDac=false;
if (dpcmMode && !skipRegisterWrites) {
unsigned int dpcmAddr=sampleOffDPCM[dacSample];
unsigned int dpcmLen=(parent->getSample(dacSample)->lengthDPCM+15)>>4;
if (dpcmLen>255) dpcmLen=255;
goingToLoop=parent->getSample(dacSample)->isLoopable();
// write DPCM
rWrite(0x4015,15);
rWrite(0x4010,calcDPCMRate(dacRate)|(goingToLoop?0x40:0));
rWrite(0x4012,(dpcmAddr>>6)&0xff);
rWrite(0x4013,dpcmLen&0xff);
rWrite(0x4015,31);
dpcmBank=dpcmAddr>>14;
}
}
break;
} else if (c.chan==3) { // noise
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=c.value;
}
} 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;
}
if (c.chan==2) {
rWrite(0x4000+c.chan*4,0xff);
} else if (!parent->song.brokenOutVol2) {
rWrite(0x4000+c.chan*4,(chan[c.chan].envMode<<4)|chan[c.chan].vol|((chan[c.chan].duty&3)<<6));
}
break;
case DIV_CMD_NOTE_OFF:
if (c.chan==4) {
dacSample=-1;
if (dumpWrites) addWrite(0xffff0002,0);
if (dpcmMode && !skipRegisterWrites) rWrite(0x4015,15);
}
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) {
if (c.chan==2) {
rWrite(0x4000+c.chan*4,0xff);
} else {
rWrite(0x4000+c.chan*4,(chan[c.chan].envMode<<4)|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==4)?(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;
if (c.chan==3) { // noise
chan[c.chan].freqChanged=true;
} else if (c.chan<2) {
rWrite(0x4000+c.chan*4,(chan[c.chan].active?((chan[c.chan].envMode<<4)|chan[c.chan].outVol):0x30)|((chan[c.chan].duty&3)<<6));
}
break;
case DIV_CMD_NES_SWEEP:
if (c.chan>1) break;
if (c.value2==0) {
chan[c.chan].sweep=0x08;
} else {
if (!c.value) { // down
chan[c.chan].sweep=0x88|(c.value2&0x77);
} else { // up
chan[c.chan].sweep=0x80|(c.value2&0x77);
}
}
rWrite(0x4001+(c.chan*4),chan[c.chan].sweep);
break;
case DIV_CMD_NES_ENV_MODE:
chan[c.chan].envMode=c.value&3;
if (c.chan==3) { // noise
chan[c.chan].freqChanged=true;
} else if (c.chan<2) {
rWrite(0x4000+c.chan*4,(chan[c.chan].active?((chan[c.chan].envMode<<4)|chan[c.chan].outVol):0x30)|((chan[c.chan].duty&3)<<6));
}
break;
case DIV_CMD_NES_LENGTH:
if (c.chan>=4) break;
chan[c.chan].len=c.value&0x1f;
chan[c.chan].freqChanged=true;
chan[c.chan].prevFreq=-1;
break;
case DIV_CMD_NES_COUNT_MODE:
countMode=c.value;
rWrite(0x4017,countMode?0x80:0);
break;
case DIV_CMD_NES_DMC:
rWrite(0x4011,c.value&0x7f);
break;
case DIV_CMD_SAMPLE_MODE:
dpcmMode=c.value;
if (dumpWrites && dpcmMode) addWrite(0xffff0002,0);
dacSample=-1;
rWrite(0x4015,15);
rWrite(0x4010,0);
rWrite(0x4012,0);
rWrite(0x4013,0);
rWrite(0x4015,31);
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==3) break;
if (c.chan==4) {
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 DivPlatformNES::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
if (useNP) {
nes1_NP->SetMask(((int)isMuted[0])|(isMuted[1]<<1));
nes2_NP->SetMask(((int)isMuted[2])|(isMuted[3]<<1)|(isMuted[4]<<2));
} else {
nes->muted[ch]=mute;
}
}
void DivPlatformNES::forceIns() {
for (int i=0; i<5; i++) {
chan[i].insChanged=true;
chan[i].prevFreq=65535;
}
rWrite(0x4001,chan[0].sweep);
rWrite(0x4005,chan[1].sweep);
rWrite(0x4017,countMode?0x80:0);
}
void* DivPlatformNES::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformNES::getChanMacroInt(int ch) {
return &chan[ch].std;
}
DivDispatchOscBuffer* DivPlatformNES::getOscBuffer(int ch) {
return oscBuf[ch];
}
unsigned char* DivPlatformNES::getRegisterPool() {
return regPool;
}
int DivPlatformNES::getRegisterPoolSize() {
return 32;
}
float DivPlatformNES::getPostAmp() {
return 2.0f;
}
void DivPlatformNES::reset() {
for (int i=0; i<5; i++) {
chan[i]=DivPlatformNES::Channel();
chan[i].std.setEngine(parent);
}
if (dumpWrites) {
addWrite(0xffffffff,0);
}
dacPeriod=0;
dacPos=0;
dacRate=0;
dacSample=-1;
sampleBank=0;
dpcmBank=0;
dpcmMode=false;
goingToLoop=false;
countMode=false;
if (useNP) {
nes1_NP->Reset();
nes2_NP->Reset();
nes1_NP->SetMask(((int)isMuted[0])|(isMuted[1]<<1));
nes2_NP->SetMask(((int)isMuted[2])|(isMuted[3]<<1)|(isMuted[4]<<2));
} else {
apu_turn_on(nes,apuType);
nes->apu.cpu_cycles=0;
nes->apu.cpu_opcode_cycle=0;
}
memset(regPool,0,128);
rWrite(0x4015,0x1f);
rWrite(0x4001,chan[0].sweep);
rWrite(0x4005,chan[1].sweep);
dacAntiClickOn=true;
dacAntiClick=0;
}
bool DivPlatformNES::keyOffAffectsArp(int ch) {
return true;
}
void DivPlatformNES::setFlags(const DivConfig& flags) {
int clockSel=flags.getInt("clockSel",0);
if (clockSel==2) { // Dendy
chipClock=COLOR_PAL*2.0/5.0;
apuType=2;
} else if (clockSel==1) { // PAL
chipClock=COLOR_PAL*3.0/8.0;
apuType=1;
} else { // NTSC
chipClock=COLOR_NTSC/2.0;
apuType=0;
}
if (useNP) {
nes1_NP->SetClock(rate);
nes1_NP->SetRate(rate);
nes2_NP->SetClock(rate);
nes2_NP->SetRate(rate);
nes2_NP->SetPal(apuType==1);
} else {
nes->apu.type=apuType;
}
CHECK_CUSTOM_CLOCK;
rate=chipClock;
for (int i=0; i<5; i++) {
oscBuf[i]->rate=rate/32;
}
}
void DivPlatformNES::notifyInsDeletion(void* ins) {
for (int i=0; i<5; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformNES::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformNES::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
void DivPlatformNES::setNSFPlay(bool use) {
useNP=use;
}
unsigned char DivPlatformNES::readDMC(unsigned short addr) {
return dpcmMem[(addr&0x3fff)|((dpcmBank&15)<<14)];
}
const void* DivPlatformNES::getSampleMem(int index) {
return index==0?dpcmMem:NULL;
}
size_t DivPlatformNES::getSampleMemCapacity(int index) {
return index==0?262144:0;
}
size_t DivPlatformNES::getSampleMemUsage(int index) {
return index==0?dpcmMemLen:0;
}
bool DivPlatformNES::isSampleLoaded(int index, int sample) {
if (index!=0) return false;
if (sample<0 || sample>255) return false;
return sampleLoaded[sample];
}
void DivPlatformNES::renderSamples(int sysID) {
memset(dpcmMem,0,getSampleMemCapacity(0));\
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]) {
sampleOffDPCM[i]=0;
continue;
}
unsigned int paddedLen=(s->lengthDPCM+63)&(~0x3f);
logV("%d padded length: %d",i,paddedLen);
if ((memPos&(~0x3fff))!=((memPos+paddedLen)&(~0x3fff))) {
memPos=(memPos+0x3fff)&(~0x3fff);
}
if (paddedLen>4081) {
paddedLen=4096;
}
if (memPos>=getSampleMemCapacity(0)) {
logW("out of DPCM memory for sample %d!",i);
break;
}
if (memPos+paddedLen>=getSampleMemCapacity(0)) {
memcpy(dpcmMem+memPos,s->dataDPCM,getSampleMemCapacity(0)-memPos);
logW("out of DPCM memory for sample %d!",i);
} else {
memcpy(dpcmMem+memPos,s->dataDPCM,MIN(s->lengthDPCM,paddedLen));
sampleLoaded[i]=true;
}
sampleOffDPCM[i]=memPos;
memPos+=paddedLen;
}
dpcmMemLen=memPos;
}
int DivPlatformNES::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
if (useNP) {
nes1_NP=new xgm::NES_APU;
nes1_NP->SetOption(xgm::NES_APU::OPT_NONLINEAR_MIXER,1);
nes2_NP=new xgm::NES_DMC;
nes2_NP->SetOption(xgm::NES_DMC::OPT_NONLINEAR_MIXER,1);
nes2_NP->SetMemory([this](unsigned short addr, unsigned int& data) {
data=readDMC(addr);
});
nes2_NP->SetAPU(nes1_NP);
} else {
nes=new struct NESAPU;
nes->readDMC=_readDMC;
nes->readDMCUser=this;
}
writeOscBuf=0;
for (int i=0; i<5; i++) {
isMuted[i]=false;
if (!useNP) nes->muted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
setFlags(flags);
dpcmMem=new unsigned char[262144];
dpcmMemLen=0;
dpcmBank=0;
init_nla_table(500,500);
reset();
return 5;
}
void DivPlatformNES::quit() {
for (int i=0; i<5; i++) {
delete oscBuf[i];
}
if (useNP) {
delete nes1_NP;
delete nes2_NP;
} else {
delete nes;
}
}
DivPlatformNES::~DivPlatformNES() {
}
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