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furnace/src/engine/platform/ym2610.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 "ym2610.h"
#include "../engine.h"
#include <string.h>
#include <math.h>
#include "ym2610shared.h"
#include "fmshared_OPN.h"
static unsigned char konOffs[4]={
1, 2, 5, 6
};
#define CHIP_DIVIDER 32
const char* DivPlatformYM2610::getEffectName(unsigned char effect) {
switch (effect) {
case 0x10:
return "10xy: Setup LFO (x: enable; y: speed)";
break;
case 0x11:
return "11xx: Set feedback (0 to 7)";
break;
case 0x12:
return "12xx: Set level of operator 1 (0 highest, 7F lowest)";
break;
case 0x13:
return "13xx: Set level of operator 2 (0 highest, 7F lowest)";
break;
case 0x14:
return "14xx: Set level of operator 3 (0 highest, 7F lowest)";
break;
case 0x15:
return "15xx: Set level of operator 4 (0 highest, 7F lowest)";
break;
case 0x16:
return "16xy: Set operator multiplier (x: operator from 1 to 4; y: multiplier)";
break;
case 0x18:
return "18xx: Toggle extended channel 3 mode";
break;
case 0x19:
return "19xx: Set attack of all operators (0 to 1F)";
break;
case 0x1a:
return "1Axx: Set attack of operator 1 (0 to 1F)";
break;
case 0x1b:
return "1Bxx: Set attack of operator 2 (0 to 1F)";
break;
case 0x1c:
return "1Cxx: Set attack of operator 3 (0 to 1F)";
break;
case 0x1d:
return "1Dxx: Set attack of operator 4 (0 to 1F)";
break;
case 0x20:
return "20xx: Set SSG channel mode (bit 0: square; bit 1: noise; bit 2: envelope)";
break;
case 0x21:
return "21xx: Set SSG noise frequency (0 to 1F)";
break;
case 0x22:
return "22xy: Set SSG envelope mode (x: shape, y: enable for this channel)";
break;
case 0x23:
return "23xx: Set SSG envelope period low byte";
break;
case 0x24:
return "24xx: Set SSG envelope period high byte";
break;
case 0x25:
return "25xx: SSG envelope slide up";
break;
case 0x26:
return "26xx: SSG envelope slide down";
break;
case 0x29:
return "29xy: Set SSG auto-envelope (x: numerator; y: denominator)";
break;
}
return NULL;
}
void DivPlatformYM2610::acquire(short* bufL, short* bufR, size_t start, size_t len) {
static int os[2];
for (size_t h=start; h<start+len; h++) {
os[0]=0; os[1]=0;
if (!writes.empty()) {
if (--delay<1) {
QueuedWrite& w=writes.front();
fm->write(0x0+((w.addr>>8)<<1),w.addr);
fm->write(0x1+((w.addr>>8)<<1),w.val);
regPool[w.addr&0x1ff]=w.val;
writes.pop();
delay=4;
}
}
fm->generate(&fmout);
os[0]=fmout.data[0]+(fmout.data[2]>>1);
if (os[0]<-32768) os[0]=-32768;
if (os[0]>32767) os[0]=32767;
os[1]=fmout.data[1]+(fmout.data[2]>>1);
if (os[1]<-32768) os[1]=-32768;
if (os[1]>32767) os[1]=32767;
bufL[h]=os[0];
bufR[h]=os[1];
}
}
void DivPlatformYM2610::tick() {
// PSG
for (int i=4; i<7; i++) {
chan[i].std.next();
if (chan[i].std.hadVol) {
chan[i].outVol=MIN(15,chan[i].std.vol)-(15-(chan[i].vol&15));
if (chan[i].outVol<0) chan[i].outVol=0;
if (isMuted[i]) {
rWrite(0x04+i,0);
} else {
rWrite(0x04+i,(chan[i].outVol&15)|((chan[i].psgMode&4)<<2));
}
}
if (chan[i].std.hadArp) {
if (!chan[i].inPorta) {
if (chan[i].std.arpMode) {
chan[i].baseFreq=NOTE_PERIODIC(chan[i].std.arp);
} else {
chan[i].baseFreq=NOTE_PERIODIC(chan[i].note+chan[i].std.arp);
}
}
chan[i].freqChanged=true;
} else {
if (chan[i].std.arpMode && chan[i].std.finishedArp) {
chan[i].baseFreq=NOTE_PERIODIC(chan[i].note);
chan[i].freqChanged=true;
}
}
if (chan[i].std.hadDuty) {
ayNoiseFreq=31-chan[i].std.duty;
rWrite(0x06,ayNoiseFreq);
}
if (chan[i].std.hadWave) {
chan[i].psgMode=(chan[i].std.wave+1)&7;
if (isMuted[i]) {
rWrite(0x04+i,0);
} else {
rWrite(0x04+i,(chan[i].outVol&15)|((chan[i].psgMode&4)<<2));
}
}
if (chan[i].std.hadEx2) {
ayEnvMode=chan[i].std.ex2;
rWrite(0x0d,ayEnvMode);
}
if (chan[i].std.hadEx3) {
chan[i].autoEnvNum=chan[i].std.ex3;
chan[i].freqChanged=true;
if (!chan[i].std.willAlg) chan[i].autoEnvDen=1;
}
if (chan[i].std.hadAlg) {
chan[i].autoEnvDen=chan[i].std.alg;
chan[i].freqChanged=true;
if (!chan[i].std.willEx3) chan[i].autoEnvNum=1;
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true);
if (chan[i].freq>4095) chan[i].freq=4095;
if (chan[i].keyOn) {
}
if (chan[i].keyOff) {
rWrite(0x04+i,0);
}
rWrite((i-4)<<1,chan[i].freq&0xff);
rWrite(1+((i-4)<<1),chan[i].freq>>8);
if (chan[i].keyOn) chan[i].keyOn=false;
if (chan[i].keyOff) chan[i].keyOff=false;
if (chan[i].freqChanged && chan[i].autoEnvNum>0 && chan[i].autoEnvDen>0) {
ayEnvPeriod=(chan[i].freq*chan[i].autoEnvDen/chan[i].autoEnvNum)>>4;
immWrite(0x0b,ayEnvPeriod);
immWrite(0x0c,ayEnvPeriod>>8);
}
chan[i].freqChanged=false;
}
}
rWrite(0x07,
~((chan[4].psgMode&1)|
((chan[5].psgMode&1)<<1)|
((chan[6].psgMode&1)<<2)|
((chan[4].psgMode&2)<<2)|
((chan[5].psgMode&2)<<3)|
((chan[6].psgMode&2)<<4)));
if (ayEnvSlide!=0) {
ayEnvSlideLow+=ayEnvSlide;
while (ayEnvSlideLow>7) {
ayEnvSlideLow-=8;
if (ayEnvPeriod<0xffff) {
ayEnvPeriod++;
immWrite(0x0b,ayEnvPeriod);
immWrite(0x0c,ayEnvPeriod>>8);
}
}
while (ayEnvSlideLow<-7) {
ayEnvSlideLow+=8;
if (ayEnvPeriod>0) {
ayEnvPeriod--;
immWrite(0x0b,ayEnvPeriod);
immWrite(0x0c,ayEnvPeriod>>8);
}
}
}
// FM
for (int i=0; i<4; i++) {
if (i==1 && extMode) continue;
chan[i].std.next();
if (chan[i].std.hadVol) {
chan[i].outVol=(chan[i].vol*MIN(127,chan[i].std.vol))/127;
for (int j=0; j<4; j++) {
unsigned short baseAddr=chanOffs[i]|opOffs[j];
DivInstrumentFM::Operator& op=chan[i].state.op[j];
if (isOutput[chan[i].state.alg][j]) {
rWrite(baseAddr+ADDR_TL,127-(((127-op.tl)*(chan[i].outVol&0x7f))/127));
} else {
rWrite(baseAddr+ADDR_TL,op.tl);
}
}
}
if (chan[i].std.hadArp) {
if (!chan[i].inPorta) {
if (chan[i].std.arpMode) {
chan[i].baseFreq=NOTE_FREQUENCY(chan[i].std.arp);
} else {
chan[i].baseFreq=NOTE_FREQUENCY(chan[i].note+(signed char)chan[i].std.arp);
}
}
chan[i].freqChanged=true;
} else {
if (chan[i].std.arpMode && chan[i].std.finishedArp) {
chan[i].baseFreq=NOTE_FREQUENCY(chan[i].note);
chan[i].freqChanged=true;
}
}
if (chan[i].std.hadAlg) {
chan[i].state.alg=chan[i].std.alg;
rWrite(chanOffs[i]+ADDR_FB_ALG,(chan[i].state.alg&7)|(chan[i].state.fb<<3));
if (!parent->song.algMacroBehavior) for (int j=0; j<4; j++) {
unsigned short baseAddr=chanOffs[i]|opOffs[j];
DivInstrumentFM::Operator& op=chan[i].state.op[j];
if (isMuted[i]) {
rWrite(baseAddr+ADDR_TL,127);
} else {
if (isOutput[chan[i].state.alg][j]) {
rWrite(baseAddr+ADDR_TL,127-(((127-op.tl)*(chan[i].outVol&0x7f))/127));
} else {
rWrite(baseAddr+ADDR_TL,op.tl);
}
}
}
}
if (chan[i].std.hadFb) {
chan[i].state.fb=chan[i].std.fb;
rWrite(chanOffs[i]+ADDR_FB_ALG,(chan[i].state.alg&7)|(chan[i].state.fb<<3));
}
if (chan[i].std.hadFms) {
chan[i].state.fms=chan[i].std.fms;
rWrite(chanOffs[i]+ADDR_LRAF,(isMuted[i]?0:(chan[i].pan<<6))|(chan[i].state.fms&7)|((chan[i].state.ams&3)<<4));
}
if (chan[i].std.hadAms) {
chan[i].state.ams=chan[i].std.ams;
rWrite(chanOffs[i]+ADDR_LRAF,(isMuted[i]?0:(chan[i].pan<<6))|(chan[i].state.fms&7)|((chan[i].state.ams&3)<<4));
}
for (int j=0; j<4; j++) {
unsigned short baseAddr=chanOffs[i]|opOffs[j];
DivInstrumentFM::Operator& op=chan[i].state.op[j];
DivMacroInt::IntOp& m=chan[i].std.op[j];
if (m.hadAm) {
op.am=m.am;
rWrite(baseAddr+ADDR_AM_DR,(op.dr&31)|(op.am<<7));
}
if (m.hadAr) {
op.ar=m.ar;
rWrite(baseAddr+ADDR_RS_AR,(op.ar&31)|(op.rs<<6));
}
if (m.hadDr) {
op.dr=m.dr;
rWrite(baseAddr+ADDR_AM_DR,(op.dr&31)|(op.am<<7));
}
if (m.hadMult) {
op.mult=m.mult;
rWrite(baseAddr+ADDR_MULT_DT,(op.mult&15)|(dtTable[op.dt&7]<<4));
}
if (m.hadRr) {
op.rr=m.rr;
rWrite(baseAddr+ADDR_SL_RR,(op.rr&15)|(op.sl<<4));
}
if (m.hadSl) {
op.sl=m.sl;
rWrite(baseAddr+ADDR_SL_RR,(op.rr&15)|(op.sl<<4));
}
if (m.hadTl) {
op.tl=127-m.tl;
if (isOutput[chan[i].state.alg][j]) {
rWrite(baseAddr+ADDR_TL,127-(((127-op.tl)*(chan[i].outVol&0x7f))/127));
} else {
rWrite(baseAddr+ADDR_TL,op.tl);
}
}
if (m.hadRs) {
op.rs=m.rs;
rWrite(baseAddr+ADDR_RS_AR,(op.ar&31)|(op.rs<<6));
}
if (m.hadDt) {
op.dt=m.dt;
rWrite(baseAddr+ADDR_MULT_DT,(op.mult&15)|(dtTable[op.dt&7]<<4));
}
if (m.hadD2r) {
op.d2r=m.d2r;
rWrite(baseAddr+ADDR_DT2_D2R,op.d2r&31);
}
if (m.hadSsg) {
op.ssgEnv=m.ssg;
rWrite(baseAddr+ADDR_SSG,op.ssgEnv&15);
}
}
if (chan[i].keyOn || chan[i].keyOff) {
immWrite(0x28,0x00|konOffs[i]);
chan[i].keyOff=false;
}
}
for (int i=0; i<512; i++) {
if (pendingWrites[i]!=oldWrites[i]) {
immWrite(i,pendingWrites[i]&0xff);
oldWrites[i]=pendingWrites[i];
}
}
for (int i=0; i<4; i++) {
if (i==1 && extMode) continue;
if (chan[i].freqChanged) {
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,octave(chan[i].baseFreq));
if (chan[i].freq>262143) chan[i].freq=262143;
int freqt=toFreq(chan[i].freq);
immWrite(chanOffs[i]+ADDR_FREQH,freqt>>8);
immWrite(chanOffs[i]+ADDR_FREQ,freqt&0xff);
chan[i].freqChanged=false;
}
if (chan[i].keyOn) {
immWrite(0x28,0xf0|konOffs[i]);
chan[i].keyOn=false;
}
}
}
int DivPlatformYM2610::octave(int freq) {
if (freq>=622.0f*128) {
return 128;
} else if (freq>=622.0f*64) {
return 64;
} else if (freq>=622.0f*32) {
return 32;
} else if (freq>=622.0f*16) {
return 16;
} else if (freq>=622.0f*8) {
return 8;
} else if (freq>=622.0f*4) {
return 4;
} else if (freq>=622.0f*2) {
return 2;
} else {
return 1;
}
return 1;
}
int DivPlatformYM2610::toFreq(int freq) {
if (freq>=622.0f*128) {
return 0x3800|((freq>>7)&0x7ff);
} else if (freq>=622.0f*64) {
return 0x3000|((freq>>6)&0x7ff);
} else if (freq>=622.0f*32) {
return 0x2800|((freq>>5)&0x7ff);
} else if (freq>=622.0f*16) {
return 0x2000|((freq>>4)&0x7ff);
} else if (freq>=622.0f*8) {
return 0x1800|((freq>>3)&0x7ff);
} else if (freq>=622.0f*4) {
return 0x1000|((freq>>2)&0x7ff);
} else if (freq>=622.0f*2) {
return 0x800|((freq>>1)&0x7ff);
} else {
return freq&0x7ff;
}
}
int DivPlatformYM2610::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
if (c.chan>6) { // ADPCM
if (skipRegisterWrites) break;
if ((12*sampleBank+c.value%12)>=parent->song.sampleLen) {
immWrite(0x100,0x80|(1<<(c.chan-7)));
immWrite(0x110+c.chan-7,0);
immWrite(0x118+c.chan-7,0);
immWrite(0x120+c.chan-7,0);
immWrite(0x128+c.chan-7,0);
break;
}
DivSample* s=parent->song.sample[12*sampleBank+c.value%12];
immWrite(0x110+c.chan-7,(s->offA>>8)&0xff);
immWrite(0x118+c.chan-7,s->offA>>16);
int end=s->offA+s->lengthA-1;
immWrite(0x120+c.chan-7,(end>>8)&0xff);
immWrite(0x128+c.chan-7,end>>16);
immWrite(0x108+(c.chan-7),isMuted[c.chan]?0:((chan[c.chan].pan<<6)|chan[c.chan].vol));
immWrite(0x100,0x00|(1<<(c.chan-7)));
break;
}
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
chan[c.chan].std.init(ins);
if (c.chan<4) {
if (!chan[c.chan].std.willVol) {
chan[c.chan].outVol=chan[c.chan].vol;
}
}
if (c.chan>3) { // PSG
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;
if (isMuted[c.chan]) {
rWrite(0x04+c.chan,0);
} else {
rWrite(0x04+c.chan,(chan[c.chan].vol&15)|((chan[c.chan].psgMode&4)<<2));
}
break;
}
if (chan[c.chan].insChanged) {
chan[c.chan].state=ins->fm;
}
for (int i=0; i<4; i++) {
unsigned short baseAddr=chanOffs[c.chan]|opOffs[i];
DivInstrumentFM::Operator& op=chan[c.chan].state.op[i];
if (isOutput[chan[c.chan].state.alg][i]) {
if (!chan[c.chan].active || chan[c.chan].insChanged) {
rWrite(baseAddr+ADDR_TL,127-(((127-op.tl)*(chan[c.chan].outVol&0x7f))/127));
}
} else {
if (chan[c.chan].insChanged) {
rWrite(baseAddr+ADDR_TL,op.tl);
}
}
if (chan[c.chan].insChanged) {
rWrite(baseAddr+ADDR_MULT_DT,(op.mult&15)|(dtTable[op.dt&7]<<4));
rWrite(baseAddr+ADDR_RS_AR,(op.ar&31)|(op.rs<<6));
rWrite(baseAddr+ADDR_AM_DR,(op.dr&31)|(op.am<<7));
rWrite(baseAddr+ADDR_DT2_D2R,op.d2r&31);
rWrite(baseAddr+ADDR_SL_RR,(op.rr&15)|(op.sl<<4));
rWrite(baseAddr+ADDR_SSG,op.ssgEnv&15);
}
}
if (chan[c.chan].insChanged) {
rWrite(chanOffs[c.chan]+ADDR_FB_ALG,(chan[c.chan].state.alg&7)|(chan[c.chan].state.fb<<3));
rWrite(chanOffs[c.chan]+ADDR_LRAF,(isMuted[c.chan]?0:(chan[c.chan].pan<<6))|(chan[c.chan].state.fms&7)|((chan[c.chan].state.ams&3)<<4));
}
chan[c.chan].insChanged=false;
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value);
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
}
chan[c.chan].keyOn=true;
chan[c.chan].active=true;
break;
}
case DIV_CMD_NOTE_OFF:
if (c.chan>6) {
immWrite(0x100,0x80|(1<<(c.chan-7)));
break;
}
chan[c.chan].keyOff=true;
chan[c.chan].keyOn=false;
chan[c.chan].active=false;
chan[c.chan].std.init(NULL);
break;
case DIV_CMD_NOTE_OFF_ENV:
if (c.chan>6) {
immWrite(0x100,0x80|(1<<(c.chan-7)));
break;
}
if (c.chan>3) {
chan[c.chan].std.release();
break;
}
chan[c.chan].keyOff=true;
chan[c.chan].keyOn=false;
chan[c.chan].active=false;
chan[c.chan].std.release();
break;
case DIV_CMD_ENV_RELEASE:
chan[c.chan].std.release();
break;
case DIV_CMD_VOLUME: {
chan[c.chan].vol=c.value;
if (!chan[c.chan].std.hasVol) {
chan[c.chan].outVol=c.value;
}
if (c.chan>6) { // ADPCM
immWrite(0x108+(c.chan-7),isMuted[c.chan]?0:((chan[c.chan].pan<<6)|chan[c.chan].vol));
break;
}
if (c.chan>3) { // PSG
if (isMuted[c.chan]) {
rWrite(0x04+c.chan,0);
} else {
if (chan[c.chan].active) rWrite(0x04+c.chan,(chan[c.chan].vol&15)|((chan[c.chan].psgMode&4)<<2));
}
break;
}
for (int i=0; i<4; i++) {
unsigned short baseAddr=chanOffs[c.chan]|opOffs[i];
DivInstrumentFM::Operator& op=chan[c.chan].state.op[i];
if (isOutput[chan[c.chan].state.alg][i]) {
rWrite(baseAddr+ADDR_TL,127-(((127-op.tl)*(chan[c.chan].outVol&0x7f))/127));
} else {
rWrite(baseAddr+ADDR_TL,op.tl);
}
}
break;
}
case DIV_CMD_GET_VOLUME: {
return chan[c.chan].vol;
break;
}
case DIV_CMD_INSTRUMENT:
if (chan[c.chan].ins!=c.value || c.value2==1) {
chan[c.chan].insChanged=true;
}
chan[c.chan].ins=c.value;
break;
case DIV_CMD_PANNING: {
switch (c.value) {
case 0x01:
chan[c.chan].pan=1;
break;
case 0x10:
chan[c.chan].pan=2;
break;
default:
chan[c.chan].pan=3;
break;
}
if (c.chan>6) {
immWrite(0x108+(c.chan-7),isMuted[c.chan]?0:((chan[c.chan].pan<<6)|chan[c.chan].vol));
break;
}
if (c.chan>3) break;
rWrite(chanOffs[c.chan]+ADDR_LRAF,(isMuted[c.chan]?0:(chan[c.chan].pan<<6))|(chan[c.chan].state.fms&7)|((chan[c.chan].state.ams&3)<<4));
break;
}
case DIV_CMD_PITCH: {
chan[c.chan].pitch=c.value;
chan[c.chan].freqChanged=true;
break;
}
case DIV_CMD_NOTE_PORTA: {
if (c.chan>3) { // PSG
int destFreq=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;
}
int destFreq=NOTE_FREQUENCY(c.value2);
int newFreq;
bool return2=false;
if (destFreq>chan[c.chan].baseFreq) {
newFreq=chan[c.chan].baseFreq+c.value*octave(chan[c.chan].baseFreq);
if (newFreq>=destFreq) {
newFreq=destFreq;
return2=true;
}
} else {
newFreq=chan[c.chan].baseFreq-c.value*octave(chan[c.chan].baseFreq);
if (newFreq<=destFreq) {
newFreq=destFreq;
return2=true;
}
}
if (!chan[c.chan].portaPause) {
if (octave(chan[c.chan].baseFreq)!=octave(newFreq)) {
chan[c.chan].portaPause=true;
break;
}
}
chan[c.chan].baseFreq=newFreq;
chan[c.chan].portaPause=false;
chan[c.chan].freqChanged=true;
if (return2) return 2;
break;
}
case DIV_CMD_SAMPLE_BANK:
sampleBank=c.value;
if (sampleBank>(parent->song.sample.size()/12)) {
sampleBank=parent->song.sample.size()/12;
}
iface.sampleBank=sampleBank;
break;
case DIV_CMD_LEGATO: {
if (c.chan>3) { // PSG
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
} else {
chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value);
}
chan[c.chan].freqChanged=true;
break;
}
case DIV_CMD_FM_LFO: {
rWrite(0x22,(c.value&7)|((c.value>>4)<<3));
break;
}
case DIV_CMD_FM_FB: {
if (c.chan>3) break;
chan[c.chan].state.fb=c.value&7;
rWrite(chanOffs[c.chan]+ADDR_FB_ALG,(chan[c.chan].state.alg&7)|(chan[c.chan].state.fb<<3));
break;
}
case DIV_CMD_FM_MULT: {
if (c.chan>3) break;
unsigned short baseAddr=chanOffs[c.chan]|opOffs[orderedOps[c.value]];
DivInstrumentFM::Operator& op=chan[c.chan].state.op[orderedOps[c.value]];
op.mult=c.value2&15;
rWrite(baseAddr+ADDR_MULT_DT,(op.mult&15)|(dtTable[op.dt&7]<<4));
break;
}
case DIV_CMD_FM_TL: {
if (c.chan>3) break;
unsigned short baseAddr=chanOffs[c.chan]|opOffs[orderedOps[c.value]];
DivInstrumentFM::Operator& op=chan[c.chan].state.op[orderedOps[c.value]];
op.tl=c.value2;
if (isOutput[chan[c.chan].state.alg][c.value]) {
rWrite(baseAddr+ADDR_TL,127-(((127-op.tl)*(chan[c.chan].outVol&0x7f))/127));
} else {
rWrite(baseAddr+ADDR_TL,op.tl);
}
break;
}
case DIV_CMD_FM_AR: {
if (c.chan>3) break;
if (c.value<0) {
for (int i=0; i<4; i++) {
DivInstrumentFM::Operator& op=chan[c.chan].state.op[i];
op.ar=c.value2&31;
unsigned short baseAddr=chanOffs[c.chan]|opOffs[i];
rWrite(baseAddr+ADDR_RS_AR,(op.ar&31)|(op.rs<<6));
}
} else {
DivInstrumentFM::Operator& op=chan[c.chan].state.op[orderedOps[c.value]];
op.ar=c.value2&31;
unsigned short baseAddr=chanOffs[c.chan]|opOffs[orderedOps[c.value]];
rWrite(baseAddr+ADDR_RS_AR,(op.ar&31)|(op.rs<<6));
}
break;
}
case DIV_CMD_STD_NOISE_MODE:
if (c.chan<4 || c.chan>6) break;
chan[c.chan].psgMode=(c.value+1)&7;
if (isMuted[c.chan]) {
rWrite(0x04+c.chan,0);
} else if (chan[c.chan].active) {
rWrite(0x04+c.chan,(chan[c.chan].outVol&15)|((chan[c.chan].psgMode&4)<<2));
}
break;
case DIV_CMD_STD_NOISE_FREQ:
if (c.chan<4 || c.chan>6) break;
ayNoiseFreq=31-c.value;
rWrite(0x06,ayNoiseFreq);
break;
case DIV_CMD_AY_ENVELOPE_SET:
if (c.chan<4 || c.chan>6) break;
ayEnvMode=c.value>>4;
rWrite(0x0d,ayEnvMode);
if (c.value&15) {
chan[c.chan].psgMode|=4;
} else {
chan[c.chan].psgMode&=~4;
}
if (isMuted[c.chan]) {
rWrite(0x04+c.chan,0);
} else {
rWrite(0x04+c.chan,(chan[c.chan].vol&15)|((chan[c.chan].psgMode&4)<<2));
}
break;
case DIV_CMD_AY_ENVELOPE_LOW:
if (c.chan<4 || c.chan>6) break;
ayEnvPeriod&=0xff00;
ayEnvPeriod|=c.value;
immWrite(0x0b,ayEnvPeriod);
immWrite(0x0c,ayEnvPeriod>>8);
break;
case DIV_CMD_AY_ENVELOPE_HIGH:
if (c.chan<4 || c.chan>6) break;
ayEnvPeriod&=0xff;
ayEnvPeriod|=c.value<<8;
immWrite(0x0b,ayEnvPeriod);
immWrite(0x0c,ayEnvPeriod>>8);
break;
case DIV_CMD_AY_ENVELOPE_SLIDE:
if (c.chan<4 || c.chan>6) break;
ayEnvSlide=c.value;
break;
case DIV_CMD_AY_AUTO_ENVELOPE:
if (c.chan<4 || c.chan>6) break;
chan[c.chan].autoEnvNum=c.value>>4;
chan[c.chan].autoEnvDen=c.value&15;
chan[c.chan].freqChanged=true;
break;
case DIV_ALWAYS_SET_VOLUME:
return 0;
break;
case DIV_CMD_GET_VOLMAX:
if (c.chan>12) return 127;
if (c.chan>6) return 31;
if (c.chan>3) return 15;
return 127;
break;
case DIV_CMD_PRE_PORTA:
if (c.chan>3) {
if (chan[c.chan].active && c.value2) {
if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
}
}
chan[c.chan].inPorta=c.value;
break;
case DIV_CMD_PRE_NOTE:
break;
default:
//printf("WARNING: unimplemented command %d\n",c.cmd);
break;
}
return 1;
}
void DivPlatformYM2610::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
if (ch>6) { // ADPCM
immWrite(0x108+(ch-7),isMuted[ch]?0:((chan[ch].pan<<6)|chan[ch].vol));
return;
}
if (ch>3) { // PSG
if (isMuted[ch]) {
rWrite(0x04+ch,0);
} else {
rWrite(0x04+ch,(chan[ch].outVol&15)|((chan[ch].psgMode&4)<<2));
}
return;
}
// FM
rWrite(chanOffs[ch]+ADDR_LRAF,(isMuted[ch]?0:(chan[ch].pan<<6))|(chan[ch].state.fms&7)|((chan[ch].state.ams&3)<<4));
}
void DivPlatformYM2610::forceIns() {
for (int i=0; i<4; i++) {
for (int j=0; j<4; j++) {
unsigned short baseAddr=chanOffs[i]|opOffs[j];
DivInstrumentFM::Operator& op=chan[i].state.op[j];
if (isOutput[chan[i].state.alg][j]) {
rWrite(baseAddr+ADDR_TL,127-(((127-op.tl)*(chan[i].outVol&0x7f))/127));
} else {
rWrite(baseAddr+ADDR_TL,op.tl);
}
rWrite(baseAddr+ADDR_MULT_DT,(op.mult&15)|(dtTable[op.dt&7]<<4));
rWrite(baseAddr+ADDR_RS_AR,(op.ar&31)|(op.rs<<6));
rWrite(baseAddr+ADDR_AM_DR,(op.dr&31)|(op.am<<7));
rWrite(baseAddr+ADDR_DT2_D2R,op.d2r&31);
rWrite(baseAddr+ADDR_SL_RR,(op.rr&15)|(op.sl<<4));
rWrite(baseAddr+ADDR_SSG,op.ssgEnv&15);
}
rWrite(chanOffs[i]+ADDR_FB_ALG,(chan[i].state.alg&7)|(chan[i].state.fb<<3));
rWrite(chanOffs[i]+ADDR_LRAF,(isMuted[i]?0:(chan[i].pan<<6))|(chan[i].state.fms&7)|((chan[i].state.ams&3)<<4));
if (chan[i].active) {
chan[i].keyOn=true;
chan[i].freqChanged=true;
}
}
for (int i=4; i<14; i++) {
chan[i].insChanged=true;
}
immWrite(0x0b,ayEnvPeriod);
immWrite(0x0c,ayEnvPeriod>>8);
immWrite(0x0d,ayEnvMode);
}
void* DivPlatformYM2610::getChanState(int ch) {
return &chan[ch];
}
unsigned char* DivPlatformYM2610::getRegisterPool() {
return regPool;
}
int DivPlatformYM2610::getRegisterPoolSize() {
return 512;
}
void DivPlatformYM2610::poke(unsigned int addr, unsigned short val) {
immWrite(addr,val);
}
void DivPlatformYM2610::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) immWrite(i.addr,i.val);
}
void DivPlatformYM2610::reset() {
while (!writes.empty()) writes.pop();
memset(regPool,0,512);
if (dumpWrites) {
addWrite(0xffffffff,0);
}
fm->reset();
for (int i=0; i<14; i++) {
chan[i]=DivPlatformYM2610::Channel();
}
for (int i=0; i<4; i++) {
chan[i].vol=0x7f;
chan[i].outVol=0x7f;
}
for (int i=4; i<7; i++) {
chan[i].vol=0x0f;
}
for (int i=7; i<13; i++) {
chan[i].vol=0x1f;
}
chan[13].vol=0x7f;
for (int i=0; i<512; i++) {
oldWrites[i]=-1;
pendingWrites[i]=-1;
}
lastBusy=60;
dacMode=0;
dacPeriod=0;
dacPos=0;
dacRate=0;
dacSample=-1;
sampleBank=0;
ayEnvPeriod=0;
ayEnvMode=0;
ayEnvSlide=0;
ayEnvSlideLow=0;
ayNoiseFreq=0;
delay=0;
extMode=false;
// AY noise
immWrite(0x06,ayNoiseFreq);
// LFO
immWrite(0x22,0x08);
// PCM volume
immWrite(0x101,0x3f);
}
bool DivPlatformYM2610::isStereo() {
return true;
}
bool DivPlatformYM2610::keyOffAffectsArp(int ch) {
return (ch>3);
}
void DivPlatformYM2610::notifyInsChange(int ins) {
for (int i=0; i<14; i++) {
if (chan[i].ins==ins) {
chan[i].insChanged=true;
}
}
}
void DivPlatformYM2610::notifyInsDeletion(void* ins) {
for (int i=4; i<7; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
int DivPlatformYM2610::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
for (int i=0; i<14; i++) {
isMuted[i]=false;
}
chipClock=8000000;
rate=chipClock/16;
iface.parent=parent;
iface.sampleBank=0;
fm=new ymfm::ym2610(iface);
reset();
return 14;
}
void DivPlatformYM2610::quit() {
delete fm;
}
DivPlatformYM2610::~DivPlatformYM2610() {
}
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