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furnace/src/engine/platform/ymz280b.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 "ymz280b.h"
#include "../engine.h"
#include "../../ta-log.h"
#include <math.h>
#include <map>
#define CHIP_FREQBASE 25165824
#define rWrite(a,v) {if(!skipRegisterWrites) {ymz280b.write(0,a); ymz280b.write(1,v); regPool[a]=v; if(dumpWrites) addWrite(a,v); }}
const char* regCheatSheetYMZ280B[]={
"CHx_Freq", "00+x*4",
"CHx_Control", "01+x*4",
"CHx_Volume", "02+x*4",
"CHx_Panning", "03+x*4",
"CHx_StartH", "20+x*4",
"CHx_LoopStartH", "21+x*4",
"CHx_LoopEndH", "22+x*4",
"CHx_EndH", "23+x*4",
"CHx_StartM", "40+x*4",
"CHx_LoopStartM", "41+x*4",
"CHx_LoopEndM", "42+x*4",
"CHx_EndM", "43+x*4",
"CHx_StartL", "60+x*4",
"CHx_LoopStartL", "61+x*4",
"CHx_LoopEndL", "62+x*4",
"CHx_EndL", "63+x*4",
"DSP_Channel", "80",
"DSP_Enable", "81",
"DSP_Data", "82",
"RAM_AddrH", "84",
"RAM_AddrM", "85",
"RAM_AddrL", "86",
"RAM_Data", "87",
"IRQ_Enable", "E0",
"Enable", "FF",
NULL
};
const char** DivPlatformYMZ280B::getRegisterSheet() {
return regCheatSheetYMZ280B;
}
void DivPlatformYMZ280B::acquire(short** buf, size_t len) {
short why[16][256];
short *bufPtrs[16]={
why[0],why[1],why[2],why[3],why[4],why[5],why[6],why[7],
why[8],why[9],why[10],why[11],why[12],why[13],why[14],why[15]
};
size_t pos=0;
while (len > 0) {
size_t blockLen = MIN(len, 256);
ymz280b.sound_stream_update(bufPtrs, blockLen);
for (size_t i=0; i<blockLen; i++) {
int dataL=0;
int dataR=0;
for (int j=0; j<8; j++) {
dataL+=why[j*2][i];
dataR+=why[j*2+1][i];
oscBuf[j]->data[oscBuf[j]->needle++]=(short)(((int)why[j*2][i]+why[j*2+1][i])/4);
}
buf[0][pos]=(short)(dataL/8);
buf[1][pos]=(short)(dataR/8);
pos++;
}
len-=blockLen;
}
}
void DivPlatformYMZ280B::tick(bool sysTick) {
for (int i=0; i<8; i++) {
chan[i].std.next();
if (chan[i].std.vol.had) {
chan[i].outVol=((chan[i].vol&0xff)*MIN(chan[i].macroVolMul,chan[i].std.vol.val))/chan[i].macroVolMul;
writeOutVol(i);
}
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) { // panning
if (chan[i].isNewYMZ) {
chan[i].panning=8+chan[i].std.panL.val;
} else {
chan[i].panning=MIN((chan[i].std.panL.val*15/16+15)/2+1,15);
}
rWrite(0x03+i*4,chan[i].panning);
}
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].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) {
DivSample* s=parent->getSample(chan[i].sample);
unsigned char ctrl;
switch (s->depth) {
case DIV_SAMPLE_DEPTH_YMZ_ADPCM: ctrl=0x20; break;
case DIV_SAMPLE_DEPTH_8BIT: ctrl=0x40; break;
case DIV_SAMPLE_DEPTH_16BIT: ctrl=0x60; break;
default: ctrl=0;
}
double off=(s->centerRate>=1)?((double)s->centerRate/8363.0):1.0;
chan[i].freq=(int)round(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)/256.0)-1;
if (chan[i].freq<0) chan[i].freq=0;
if (chan[i].freq>511) chan[i].freq=511;
// ADPCM has half the range
if (s->depth==DIV_SAMPLE_DEPTH_YMZ_ADPCM && chan[i].freq>255) chan[i].freq=255;
ctrl|=(chan[i].active?0x80:0)|((s->isLoopable())?0x10:0)|(chan[i].freq>>8);
if (chan[i].keyOn) {
unsigned int start=0;
unsigned int loopStart=0;
unsigned int loopEnd=0;
unsigned int end=0;
if (chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
start=sampleOff[chan[i].sample];
end=MIN(start+s->getCurBufLen(),getSampleMemCapacity()-1);
}
if (chan[i].audPos>0) {
switch (s->depth) {
case DIV_SAMPLE_DEPTH_YMZ_ADPCM: start+=chan[i].audPos/2; break;
case DIV_SAMPLE_DEPTH_8BIT: start+=chan[i].audPos; break;
case DIV_SAMPLE_DEPTH_16BIT: start+=chan[i].audPos*2; break;
default: break;
}
start=MIN(start,end);
}
if (s->isLoopable()) {
switch (s->depth) {
case DIV_SAMPLE_DEPTH_YMZ_ADPCM: loopStart=start+s->loopStart/2; loopEnd=start+s->loopEnd/2; break;
case DIV_SAMPLE_DEPTH_8BIT: loopStart=start+s->loopStart; loopEnd=start+s->loopEnd; break;
case DIV_SAMPLE_DEPTH_16BIT: loopStart=start+s->loopStart*2; loopEnd=start+s->loopEnd*2; break;
default: break;
}
loopEnd=MIN(loopEnd,end);
loopStart=MIN(loopStart,loopEnd);
}
rWrite(0x01+i*4,ctrl&~0x80); // force keyoff first
rWrite(0x20+i*4,(start>>16)&0xff);
rWrite(0x21+i*4,(loopStart>>16)&0xff);
rWrite(0x22+i*4,(loopEnd>>16)&0xff);
rWrite(0x23+i*4,(end>>16)&0xff);
rWrite(0x40+i*4,(start>>8)&0xff);
rWrite(0x41+i*4,(loopStart>>8)&0xff);
rWrite(0x42+i*4,(loopEnd>>8)&0xff);
rWrite(0x43+i*4,(end>>8)&0xff);
rWrite(0x60+i*4,start&0xff);
rWrite(0x61+i*4,loopStart&0xff);
rWrite(0x62+i*4,loopEnd&0xff);
rWrite(0x63+i*4,end&0xff);
if (!chan[i].std.vol.had) {
chan[i].outVol=chan[i].vol;
writeOutVol(i);
}
chan[i].keyOn=false;
}
if (chan[i].keyOff) {
chan[i].keyOff=false;
}
if (chan[i].freqChanged) {
rWrite(0x00+i*4,chan[i].freq&0xff);
chan[i].freqChanged=false;
}
rWrite(0x01+i*4,ctrl);
}
}
}
int DivPlatformYMZ280B::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].isNewYMZ=ins->type==DIV_INS_YMZ280B;
chan[c.chan].macroVolMul=ins->type==DIV_INS_AMIGA?64:255;
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;
}
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:
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;
writeOutVol(c.chan);
}
}
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].panning=MIN(parent->convertPanSplitToLinearLR(c.value,c.value2,15)+1,15);
rWrite(0x03+c.chan*4,chan[c.chan].panning);
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;
int multiplier=(parent->song.linearPitch==2)?1:256;
if (destFreq>chan[c.chan].baseFreq) {
chan[c.chan].baseFreq+=c.value*multiplier;
if (chan[c.chan].baseFreq>=destFreq) {
chan[c.chan].baseFreq=destFreq;
return2=true;
}
} else {
chan[c.chan].baseFreq-=c.value*multiplier;
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 DivPlatformYMZ280B::writeOutVol(int ch) {
unsigned char val=isMuted[ch]?0:chan[ch].outVol;
rWrite(0x02+ch*4,val);
}
void DivPlatformYMZ280B::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
writeOutVol(ch);
}
void DivPlatformYMZ280B::forceIns() {
for (int i=0; i<8; i++) {
chan[i].insChanged=true;
chan[i].freqChanged=true;
chan[i].sample=-1;
rWrite(0x03+i*4,chan[i].panning);
}
}
void* DivPlatformYMZ280B::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformYMZ280B::getChanMacroInt(int ch) {
return &chan[ch].std;
}
unsigned short DivPlatformYMZ280B::getPan(int ch) {
return parent->convertPanLinearToSplit(chan[ch].panning,8,15);
}
DivDispatchOscBuffer* DivPlatformYMZ280B::getOscBuffer(int ch) {
return oscBuf[ch];
}
void DivPlatformYMZ280B::reset() {
memset(regPool,0,256);
ymz280b.device_reset();
rWrite(0xff,0x80); // enable keyon
for (int i=0; i<8; i++) {
chan[i]=DivPlatformYMZ280B::Channel();
chan[i].std.setEngine(parent);
rWrite(0x02+i*4,255);
rWrite(0x03+i*4,8);
}
}
int DivPlatformYMZ280B::getOutputCount() {
return 2;
}
void DivPlatformYMZ280B::notifyInsChange(int ins) {
for (int i=0; i<8; i++) {
if (chan[i].ins==ins) {
chan[i].insChanged=true;
}
}
}
void DivPlatformYMZ280B::notifyWaveChange(int wave) {
// TODO when wavetables are added
// TODO they probably won't be added unless the samples reside in RAM
}
void DivPlatformYMZ280B::notifyInsDeletion(void* ins) {
for (int i=0; i<8; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformYMZ280B::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformYMZ280B::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
unsigned char* DivPlatformYMZ280B::getRegisterPool() {
return regPool;
}
int DivPlatformYMZ280B::getRegisterPoolSize() {
return 256;
}
float DivPlatformYMZ280B::getPostAmp() {
// according to MAME core's mixing
return 4.0f;
}
const void* DivPlatformYMZ280B::getSampleMem(int index) {
return index == 0 ? sampleMem : NULL;
}
size_t DivPlatformYMZ280B::getSampleMemCapacity(int index) {
return index == 0 ? 16777216 : 0;
}
size_t DivPlatformYMZ280B::getSampleMemUsage(int index) {
return index == 0 ? sampleMemLen : 0;
}
bool DivPlatformYMZ280B::isSampleLoaded(int index, int sample) {
if (index!=0) return false;
if (sample<0 || sample>255) return false;
return sampleLoaded[sample];
}
void DivPlatformYMZ280B::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;
}
int length=s->getCurBufLen();
unsigned char* src=(unsigned char*)s->getCurBuf();
int actualLength=MIN((int)(getSampleMemCapacity()-memPos),length);
if (actualLength>0) {
#ifdef TA_BIG_ENDIAN
memcpy(&sampleMem[memPos],src,actualLength);
#else
if (s->depth==DIV_SAMPLE_DEPTH_16BIT) {
for (int i=0; i<actualLength; i++) {
sampleMem[memPos+i]=src[i^1];
}
} else {
memcpy(&sampleMem[memPos],src,actualLength);
}
#endif
sampleOff[i]=memPos;
memPos+=length;
}
if (actualLength<length) {
logW("out of YMZ280B PCM memory for sample %d!",i);
break;
}
sampleLoaded[i]=true;
}
sampleMemLen=memPos;
}
void DivPlatformYMZ280B::setChipModel(int type) {
chipType=type;
}
void DivPlatformYMZ280B::setFlags(const DivConfig& flags) {
switch (chipType) {
default:
case 280:
switch (flags.getInt("clockSel",0)) {
case 0x01:
chipClock=COLOR_NTSC*4.0;
break;
case 0x02:
chipClock=COLOR_PAL*16.0/5.0;
break;
case 0x03:
chipClock=16000000;
break;
case 0x04:
chipClock=50000000.0/3.0;
break;
case 0x05:
chipClock=14000000;
break;
default:
chipClock=16934400;
break;
}
CHECK_CUSTOM_CLOCK;
rate=chipClock/384;
break;
case 759:
rate=32000;
chipClock=rate*384;
break;
}
for (int i=0; i<8; i++) {
oscBuf[i]->rate=rate;
}
}
int DivPlatformYMZ280B::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
for (int i=0; i<8; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
sampleMem=new unsigned char[getSampleMemCapacity()];
sampleMemLen=0;
ymz280b.device_start(sampleMem);
setFlags(flags);
reset();
return 8;
}
void DivPlatformYMZ280B::quit() {
delete[] sampleMem;
for (int i=0; i<8; i++) {
delete oscBuf[i];
}
}
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