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furnace/src/engine/platform/zxbeeperquadtone.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 "zxbeeperquadtone.h"
#include "../engine.h"
#include <math.h>
#define rWrite(a,v) regPool[a]=v
#define CHIP_FREQBASE 2048*320
#define CHIP_DIVIDER 16*13
const char** DivPlatformZXBeeperQuadTone::getRegisterSheet() {
return NULL;
}
void DivPlatformZXBeeperQuadTone::acquire(short** buf, size_t len) {
bool o=false;
for (size_t h=0; h<len; h++) {
if (curSample>=0 && curSample<parent->song.sampleLen) {
while (curSamplePeriod>=chan[4].freq) {
DivSample* s=parent->getSample(curSample);
if (s->samples>0) {
o=(!isMuted[4]&&s->data8[curSamplePos++]>0);
if (curSamplePos>=s->samples) curSample=-1;
// (theoretical) 32KiB limit
if (curSamplePos>=32768*8) curSample=-1;
} else {
curSample=-1;
}
curSamplePeriod-=chan[4].freq;
}
curSamplePeriod+=40;
if ((outputClock&3)==0) {
oscBuf[0]->data[oscBuf[0]->needle++]=0;
oscBuf[1]->data[oscBuf[1]->needle++]=0;
oscBuf[2]->data[oscBuf[2]->needle++]=0;
oscBuf[3]->data[oscBuf[3]->needle++]=0;
oscBuf[4]->data[oscBuf[4]->needle++]=o?32767:0;
}
} else {
int ch=outputClock/2;
int b=ch*4;
if ((outputClock&1)==0) {
chan[ch].sPosition+=(regPool[1+b]<<8)|regPool[0+b];
chan[ch].out=regPool[3+b]+((((chan[ch].sPosition>>8)&0xff)<regPool[2+b])?1:0);
}
if ((outputClock&3)==0) {
oscBuf[4]->data[oscBuf[4]->needle++]=0;
}
o=chan[ch].out&0x10;
oscBuf[ch]->data[oscBuf[ch]->needle++]=o?32767:0;
chan[ch].out<<=1;
}
outputClock=(outputClock+1)&7;
buf[0][h]=o?32767:0;
}
}
void DivPlatformZXBeeperQuadTone::tick(bool sysTick) {
for (int i=0; i<4; i++) {
chan[i].std.next();
if (chan[i].std.vol.had) {
chan[i].outVol=(MIN(chan[i].vol,2)*MIN(chan[i].std.vol.val,2)/2);
writeOutVol(i);
}
if (chan[i].std.duty.had) {
chan[i].duty=chan[i].std.duty.val;
rWrite(2+i*4,chan[i].duty^0xff);
}
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,-65535,65535);
} else {
chan[i].pitch2=chan[i].std.pitch.val;
}
chan[i].freqChanged=true;
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
if (chan[i].active) {
chan[i].freq=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>32768) chan[i].freq=32768;
rWrite(0+i*4,chan[i].freq&0xff);
rWrite(1+i*4,chan[i].freq>>8);
}
if (chan[i].keyOn) chan[i].keyOn=false;
if (chan[i].keyOff) chan[i].keyOff=false;
chan[i].freqChanged=false;
}
}
if (NEW_ARP_STRAT) {
chan[4].handleArp();
} else if (chan[4].std.arp.had) {
if (!chan[4].inPorta) {
chan[4].baseFreq=NOTE_PERIODIC(parent->calcArp(chan[4].note,chan[4].std.arp.val));
}
chan[4].freqChanged=true;
}
if (chan[4].std.pitch.had) {
if (chan[4].std.pitch.mode) {
chan[4].pitch2+=chan[4].std.pitch.val;
CLAMP_VAR(chan[4].pitch2,-65535,65535);
} else {
chan[4].pitch2=chan[4].std.pitch.val;
}
chan[4].freqChanged=true;
}
if (chan[4].freqChanged || chan[4].keyOn || chan[4].keyOff) {
if (chan[4].active) {
double off=CHIP_DIVIDER;
if (curSample>=0 && curSample<parent->song.sampleLen) {
DivSample* s=parent->getSample(curSample);
off=(s->centerRate>=1)?(CHIP_DIVIDER*(double)s->centerRate/8363.0):CHIP_DIVIDER;
}
chan[4].freq=parent->calcFreq(chan[4].baseFreq,chan[4].pitch,chan[4].fixedArp?chan[4].baseNoteOverride:chan[4].arpOff,chan[4].fixedArp,true,2,chan[4].pitch2,chipClock,off);
if (chan[4].freq>258) chan[4].freq=258;
if (chan[4].freq<3) chan[4].freq=3;
chan[4].freq*=13;
}
if (chan[4].keyOn) chan[4].keyOn=false;
if (chan[4].keyOff) chan[4].keyOff=false;
chan[4].freqChanged=false;
}
}
int DivPlatformZXBeeperQuadTone::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
if (c.chan<4) {
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_POKEMINI);
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].active=true;
chan[c.chan].keyOn=true;
chan[c.chan].macroInit(ins);
chan[c.chan].insChanged=false;
if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
chan[c.chan].outVol=chan[c.chan].vol;
writeOutVol(c.chan);
}
} else {
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA);
if (c.value!=DIV_NOTE_NULL) {
curSample=ins->amiga.getSample(c.value);
c.value=ins->amiga.getFreq(c.value);
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
// TODO support offset commands
curSamplePos=0;
curSamplePeriod=0;
}
chan[c.chan].active=true;
chan[c.chan].keyOn=true;
chan[c.chan].macroInit(ins);
chan[c.chan].insChanged=false;
}
break;
}
case DIV_CMD_NOTE_OFF:
chan[c.chan].active=false;
chan[c.chan].keyOff=true;
chan[c.chan].macroInit(NULL);
writeOutVol(c.chan);
if (c.chan>=4) {
curSample=-1;
}
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;
chan[c.chan].insChanged=true;
}
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_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_STD_NOISE_MODE:
chan[c.chan].duty=c.value;
if (c.chan<4) rWrite(2+c.chan*4,chan[c.chan].duty^0xff);
break;
case DIV_CMD_LEGATO:
chan[c.chan].baseFreq=NOTE_FREQUENCY(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_POKEMINI));
}
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_GET_VOLMAX:
return 2;
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 DivPlatformZXBeeperQuadTone::writeOutVol(int ch) {
if (ch>=4) return;
unsigned char val=(chan[ch].outVol>=1)?((chan[ch].outVol>=2)?31:7):0;
rWrite(3+ch*4,(!isMuted[ch]&&chan[ch].active)?val:0);
}
void DivPlatformZXBeeperQuadTone::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
writeOutVol(ch);
}
void DivPlatformZXBeeperQuadTone::forceIns() {
for (int i=0; i<5; i++) {
chan[i].insChanged=true;
chan[i].freqChanged=true;
}
}
void* DivPlatformZXBeeperQuadTone::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformZXBeeperQuadTone::getChanMacroInt(int ch) {
return &chan[ch].std;
}
DivDispatchOscBuffer* DivPlatformZXBeeperQuadTone::getOscBuffer(int ch) {
return oscBuf[ch];
}
unsigned char* DivPlatformZXBeeperQuadTone::getRegisterPool() {
return regPool;
}
int DivPlatformZXBeeperQuadTone::getRegisterPoolSize() {
return 16;
}
void DivPlatformZXBeeperQuadTone::reset() {
memset(regPool,0,16);
for (int i=0; i<5; i++) {
chan[i]=DivPlatformZXBeeperQuadTone::Channel();
chan[i].std.setEngine(parent);
if (i<4) rWrite(2+i*4,128);
}
cycles=0;
curChan=0;
sOffTimer=0;
ulaOut=0;
curSample=-1;
curSamplePos=0;
curSamplePeriod=0;
outputClock=0;
}
bool DivPlatformZXBeeperQuadTone::keyOffAffectsArp(int ch) {
return true;
}
void DivPlatformZXBeeperQuadTone::notifyWaveChange(int wave) {
}
void DivPlatformZXBeeperQuadTone::notifyInsDeletion(void* ins) {
for (int i=0; i<5; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformZXBeeperQuadTone::setFlags(const DivConfig& flags) {
if (flags.getInt("clockSel",0)) {
chipClock=COLOR_PAL*4.0/5.0;
} else {
chipClock=COLOR_NTSC;
}
CHECK_CUSTOM_CLOCK;
rate=chipClock/40;
for (int i=0; i<4; i++) {
oscBuf[i]->rate=rate/4;
}
}
void DivPlatformZXBeeperQuadTone::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformZXBeeperQuadTone::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
int DivPlatformZXBeeperQuadTone::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
for (int i=0; i<5; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
setFlags(flags);
reset();
return 5;
}
void DivPlatformZXBeeperQuadTone::quit() {
for (int i=0; i<5; i++) {
delete oscBuf[i];
}
}
DivPlatformZXBeeperQuadTone::~DivPlatformZXBeeperQuadTone() {
}
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