mirror of
https://github.com/tildearrow/furnace.git
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389 lines
12 KiB
C++
389 lines
12 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2022 tildearrow and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "zxbeeperquadtone.h"
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#include "../engine.h"
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#include <math.h>
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#define rWrite(a,v) regPool[a]=v
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#define CHIP_FREQBASE 2048*320
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#define CHIP_DIVIDER 16*13
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const char** DivPlatformZXBeeperQuadTone::getRegisterSheet() {
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return NULL;
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}
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void DivPlatformZXBeeperQuadTone::acquire(short** buf, size_t len) {
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bool o=false;
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for (size_t h=0; h<len; h++) {
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if (curSample>=0 && curSample<parent->song.sampleLen) {
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while (curSamplePeriod>=chan[4].freq) {
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DivSample* s=parent->getSample(curSample);
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if (s->samples>0) {
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o=(!isMuted[4]&&s->data8[curSamplePos++]>0);
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if (curSamplePos>=s->samples) curSample=-1;
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// (theoretical) 32KiB limit
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if (curSamplePos>=32768*8) curSample=-1;
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} else {
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curSample=-1;
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}
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curSamplePeriod-=chan[4].freq;
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}
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curSamplePeriod+=40;
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if ((outputClock&3)==0) {
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oscBuf[0]->data[oscBuf[0]->needle++]=0;
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oscBuf[1]->data[oscBuf[1]->needle++]=0;
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oscBuf[2]->data[oscBuf[2]->needle++]=0;
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oscBuf[3]->data[oscBuf[3]->needle++]=0;
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oscBuf[4]->data[oscBuf[4]->needle++]=o?32767:0;
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}
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} else {
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int ch=outputClock/2;
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int b=ch*4;
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if ((outputClock&1)==0) {
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chan[ch].sPosition+=(regPool[1+b]<<8)|regPool[0+b];
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chan[ch].out=regPool[3+b]+((((chan[ch].sPosition>>8)&0xff)<regPool[2+b])?1:0);
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}
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if ((outputClock&3)==0) {
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oscBuf[4]->data[oscBuf[4]->needle++]=0;
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}
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o=chan[ch].out&0x10;
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oscBuf[ch]->data[oscBuf[ch]->needle++]=o?32767:0;
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chan[ch].out<<=1;
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}
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outputClock=(outputClock+1)&7;
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buf[0][h]=o?32767:0;
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}
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}
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void DivPlatformZXBeeperQuadTone::tick(bool sysTick) {
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for (int i=0; i<4; i++) {
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chan[i].std.next();
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if (chan[i].std.vol.had) {
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chan[i].outVol=(MIN(chan[i].vol,2)*MIN(chan[i].std.vol.val,2)/2);
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writeOutVol(i);
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}
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if (chan[i].std.duty.had) {
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chan[i].duty=chan[i].std.duty.val;
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rWrite(2+i*4,chan[i].duty^0xff);
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}
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if (NEW_ARP_STRAT) {
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chan[i].handleArp();
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} else if (chan[i].std.arp.had) {
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if (!chan[i].inPorta) {
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chan[i].baseFreq=NOTE_FREQUENCY(parent->calcArp(chan[i].note,chan[i].std.arp.val));
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].std.pitch.had) {
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if (chan[i].std.pitch.mode) {
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chan[i].pitch2+=chan[i].std.pitch.val;
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CLAMP_VAR(chan[i].pitch2,-65535,65535);
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} else {
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chan[i].pitch2=chan[i].std.pitch.val;
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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if (chan[i].active) {
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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);
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if (chan[i].freq<0) chan[i].freq=0;
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if (chan[i].freq>32768) chan[i].freq=32768;
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rWrite(0+i*4,chan[i].freq&0xff);
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rWrite(1+i*4,chan[i].freq>>8);
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}
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if (chan[i].keyOn) chan[i].keyOn=false;
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if (chan[i].keyOff) chan[i].keyOff=false;
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chan[i].freqChanged=false;
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}
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}
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if (NEW_ARP_STRAT) {
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chan[4].handleArp();
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} else if (chan[4].std.arp.had) {
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if (!chan[4].inPorta) {
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chan[4].baseFreq=NOTE_PERIODIC(parent->calcArp(chan[4].note,chan[4].std.arp.val));
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}
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chan[4].freqChanged=true;
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}
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if (chan[4].std.pitch.had) {
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if (chan[4].std.pitch.mode) {
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chan[4].pitch2+=chan[4].std.pitch.val;
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CLAMP_VAR(chan[4].pitch2,-65535,65535);
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} else {
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chan[4].pitch2=chan[4].std.pitch.val;
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}
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chan[4].freqChanged=true;
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}
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if (chan[4].freqChanged || chan[4].keyOn || chan[4].keyOff) {
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if (chan[4].active) {
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double off=CHIP_DIVIDER;
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if (curSample>=0 && curSample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(curSample);
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off=(s->centerRate>=1)?(CHIP_DIVIDER*(double)s->centerRate/8363.0):CHIP_DIVIDER;
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}
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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);
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if (chan[4].freq>258) chan[4].freq=258;
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if (chan[4].freq<3) chan[4].freq=3;
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chan[4].freq*=13;
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}
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if (chan[4].keyOn) chan[4].keyOn=false;
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if (chan[4].keyOff) chan[4].keyOff=false;
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chan[4].freqChanged=false;
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}
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}
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int DivPlatformZXBeeperQuadTone::dispatch(DivCommand c) {
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switch (c.cmd) {
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case DIV_CMD_NOTE_ON: {
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if (c.chan<4) {
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DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_BEEPER);
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value);
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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}
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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chan[c.chan].macroInit(ins);
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chan[c.chan].insChanged=false;
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if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
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chan[c.chan].outVol=chan[c.chan].vol;
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writeOutVol(c.chan);
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}
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} else {
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DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA);
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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curSample=ins->amiga.getSample(c.value);
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// TODO support offset commands
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curSamplePos=0;
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curSamplePeriod=0;
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}
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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chan[c.chan].macroInit(ins);
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chan[c.chan].insChanged=false;
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}
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break;
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}
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case DIV_CMD_NOTE_OFF:
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chan[c.chan].active=false;
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chan[c.chan].keyOff=true;
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chan[c.chan].macroInit(NULL);
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writeOutVol(c.chan);
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if (c.chan>=4) {
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curSample=-1;
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}
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break;
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case DIV_CMD_NOTE_OFF_ENV:
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case DIV_CMD_ENV_RELEASE:
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chan[c.chan].std.release();
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break;
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case DIV_CMD_INSTRUMENT:
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if (chan[c.chan].ins!=c.value || c.value2==1) {
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chan[c.chan].ins=c.value;
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chan[c.chan].insChanged=true;
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}
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break;
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case DIV_CMD_VOLUME:
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if (chan[c.chan].vol!=c.value) {
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chan[c.chan].vol=c.value;
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if (!chan[c.chan].std.vol.has) {
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chan[c.chan].outVol=c.value;
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writeOutVol(c.chan);
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}
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}
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break;
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case DIV_CMD_GET_VOLUME:
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if (chan[c.chan].std.vol.has) {
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return chan[c.chan].vol;
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}
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return chan[c.chan].outVol;
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break;
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case DIV_CMD_PITCH:
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chan[c.chan].pitch=c.value;
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chan[c.chan].freqChanged=true;
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break;
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case DIV_CMD_NOTE_PORTA: {
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int destFreq=NOTE_FREQUENCY(c.value2);
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bool return2=false;
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if (destFreq>chan[c.chan].baseFreq) {
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chan[c.chan].baseFreq+=c.value;
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if (chan[c.chan].baseFreq>=destFreq) {
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chan[c.chan].baseFreq=destFreq;
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return2=true;
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}
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} else {
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chan[c.chan].baseFreq-=c.value;
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if (chan[c.chan].baseFreq<=destFreq) {
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chan[c.chan].baseFreq=destFreq;
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return2=true;
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}
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}
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chan[c.chan].freqChanged=true;
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if (return2) {
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chan[c.chan].inPorta=false;
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return 2;
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}
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break;
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}
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case DIV_CMD_STD_NOISE_MODE:
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chan[c.chan].duty=c.value;
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if (c.chan<4) rWrite(2+c.chan*4,chan[c.chan].duty^0xff);
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break;
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case DIV_CMD_LEGATO:
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chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val):(0)));
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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break;
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case DIV_CMD_PRE_PORTA:
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if (chan[c.chan].active && c.value2) {
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if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_BEEPER));
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}
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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);
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chan[c.chan].inPorta=c.value;
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break;
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case DIV_CMD_GET_VOLMAX:
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return 2;
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break;
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case DIV_CMD_MACRO_OFF:
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chan[c.chan].std.mask(c.value,true);
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break;
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case DIV_CMD_MACRO_ON:
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chan[c.chan].std.mask(c.value,false);
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break;
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case DIV_ALWAYS_SET_VOLUME:
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return 1;
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break;
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default:
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break;
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}
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return 1;
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}
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void DivPlatformZXBeeperQuadTone::writeOutVol(int ch) {
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if (ch>=4) return;
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unsigned char val=(chan[ch].outVol>=1)?((chan[ch].outVol>=2)?31:7):0;
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rWrite(3+ch*4,(!isMuted[ch]&&chan[ch].active)?val:0);
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}
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void DivPlatformZXBeeperQuadTone::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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writeOutVol(ch);
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}
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void DivPlatformZXBeeperQuadTone::forceIns() {
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for (int i=0; i<5; i++) {
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chan[i].insChanged=true;
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chan[i].freqChanged=true;
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}
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}
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void* DivPlatformZXBeeperQuadTone::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformZXBeeperQuadTone::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivDispatchOscBuffer* DivPlatformZXBeeperQuadTone::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformZXBeeperQuadTone::getRegisterPool() {
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return regPool;
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}
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int DivPlatformZXBeeperQuadTone::getRegisterPoolSize() {
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return 16;
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}
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void DivPlatformZXBeeperQuadTone::reset() {
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memset(regPool,0,16);
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for (int i=0; i<5; i++) {
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chan[i]=DivPlatformZXBeeperQuadTone::Channel();
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chan[i].std.setEngine(parent);
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if (i<4) rWrite(2+i*4,128);
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}
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cycles=0;
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curChan=0;
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sOffTimer=0;
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ulaOut=0;
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curSample=-1;
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curSamplePos=0;
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curSamplePeriod=0;
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outputClock=0;
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}
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bool DivPlatformZXBeeperQuadTone::keyOffAffectsArp(int ch) {
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return true;
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}
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void DivPlatformZXBeeperQuadTone::notifyWaveChange(int wave) {
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}
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void DivPlatformZXBeeperQuadTone::notifyInsDeletion(void* ins) {
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for (int i=0; i<5; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformZXBeeperQuadTone::setFlags(const DivConfig& flags) {
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if (flags.getInt("clockSel",0)) {
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chipClock=COLOR_PAL*4.0/5.0;
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} else {
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chipClock=COLOR_NTSC;
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}
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CHECK_CUSTOM_CLOCK;
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rate=chipClock/40;
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for (int i=0; i<4; i++) {
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oscBuf[i]->rate=rate/4;
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}
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}
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void DivPlatformZXBeeperQuadTone::poke(unsigned int addr, unsigned short val) {
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rWrite(addr,val);
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}
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void DivPlatformZXBeeperQuadTone::poke(std::vector<DivRegWrite>& wlist) {
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for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
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}
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int DivPlatformZXBeeperQuadTone::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
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parent=p;
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for (int i=0; i<5; i++) {
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isMuted[i]=false;
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oscBuf[i]=new DivDispatchOscBuffer;
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}
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setFlags(flags);
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reset();
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return 5;
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}
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void DivPlatformZXBeeperQuadTone::quit() {
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for (int i=0; i<5; i++) {
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delete oscBuf[i];
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}
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}
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DivPlatformZXBeeperQuadTone::~DivPlatformZXBeeperQuadTone() {
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}
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