380 lines
11 KiB
C++
380 lines
11 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2023 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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#define _USE_MATH_DEFINES
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#include "bifurcator.h"
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#include "../engine.h"
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#include "../filter.h"
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#include <math.h>
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#define CHIP_FREQBASE 65536
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#define rWrite(a,v) {if(!skipRegisterWrites) {regPool[a]=v; if(dumpWrites) addWrite(a,v); }}
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const char* regCheatSheetBifurcator[]={
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"CHx_State", "x*8+0",
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"CHx_Param", "x*8+2",
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"CHx_Freq", "x*8+4",
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"CHx_LVol", "x*8+6",
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"CHx_RVol", "x*8+7",
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NULL
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};
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const char** DivPlatformBifurcator::getRegisterSheet() {
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return regCheatSheetBifurcator;
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}
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void DivPlatformBifurcator::acquire(short** buf, size_t len) {
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for (int i=0; i<4; i++) {
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chan[i].curx=regPool[i*8]|(regPool[i*8+1]<<8);
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chan[i].param=regPool[i*8+2]|(regPool[i*8+3]<<8);
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chan[i].freq=regPool[i*8+4]|(regPool[i*8+5]<<8);
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chan[i].chVolL=regPool[i*8+6];
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chan[i].chVolR=regPool[i*8+7];
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}
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for (size_t h=0; h<len; h++) {
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int l=0;
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int r=0;
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for (int i=0; i<4; i++) {
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chan[i].audSub+=chan[i].freq;
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if (chan[i].audSub>=65536) {
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int64_t newx=(int64_t)chan[i].curx*(chan[i].param+65536)/32768;
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newx*=65536-chan[i].curx;
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chan[i].curx=(int)(newx/65536);
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chan[i].audSub&=65535;
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}
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int out=chan[i].curx-32768;
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int outL=out*chan[i].chVolL/256;
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int outR=out*chan[i].chVolR/256;
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oscBuf[i]->data[oscBuf[i]->needle++]=(short)((outL+outR)/2);
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l+=outL/4;
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r+=outR/4;
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}
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buf[0][h]=(short)l;
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buf[1][h]=(short)r;
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}
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for (int i=0; i<4; i++) {
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regPool[i*8]=chan[i].curx&0xff;
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regPool[i*8+1]=chan[i].curx>>8;
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}
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}
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void DivPlatformBifurcator::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=(chan[i].vol*MIN(chan[i].std.vol.val,255))/255;
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chan[i].volChangedL=true;
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chan[i].volChangedR=true;
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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.duty.had) {
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rWrite(i*8+2,chan[i].std.duty.val&0xff);
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rWrite(i*8+3,chan[i].std.duty.val>>8);
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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,-32768,32767);
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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].std.panL.had) {
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chan[i].chPanL=(255*(chan[i].std.panL.val&255))/255;
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chan[i].volChangedL=true;
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}
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if (chan[i].std.panR.had) {
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chan[i].chPanR=(255*(chan[i].std.panR.val&255))/255;
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chan[i].volChangedR=true;
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}
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if (chan[i].std.phaseReset.had) {
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if ((chan[i].std.phaseReset.val==1) && chan[i].active) {
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rWrite(i*8,1);
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rWrite(i*8+1,0);
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}
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}
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if (chan[i].std.ex1.had) {
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rWrite(i*8,chan[i].std.ex1.val&0xff);
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rWrite(i*8+1,chan[i].std.ex1.val>>8);
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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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>65535) chan[i].freq=65535;
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rWrite(i*8+4,chan[i].freq&0xff);
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rWrite(i*8+5,chan[i].freq>>8);
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if (chan[i].keyOn) {
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if (!chan[i].std.vol.had) {
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chan[i].outVol=chan[i].vol;
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}
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chan[i].volChangedL=true;
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chan[i].volChangedR=true;
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chan[i].keyOn=false;
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}
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if (chan[i].keyOff) {
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chan[i].volChangedL=true;
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chan[i].volChangedR=true;
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chan[i].keyOff=false;
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}
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if (chan[i].freqChanged) {
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chan[i].freqChanged=false;
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}
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}
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if (chan[i].volChangedL) {
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int vol=(isMuted[i] || !chan[i].active)?0:(chan[i].outVol*chan[i].chPanL/255);
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rWrite(i*8+6,vol);
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chan[i].volChangedL=false;
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}
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if (chan[i].volChangedR) {
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int vol=(isMuted[i] || !chan[i].active)?0:(chan[i].outVol*chan[i].chPanR/255);
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rWrite(i*8+7,vol);
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chan[i].volChangedR=false;
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}
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}
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}
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int DivPlatformBifurcator::dispatch(DivCommand c) {
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switch (c.cmd) {
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case DIV_CMD_NOTE_ON: {
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DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_BIFURCATOR);
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=round(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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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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}
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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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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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}
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break;
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case DIV_CMD_VOLUME:
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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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}
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chan[c.chan].volChangedL=true;
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chan[c.chan].volChangedR=true;
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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_PANNING:
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chan[c.chan].chPanL=c.value;
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chan[c.chan].chPanR=c.value2;
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chan[c.chan].volChangedL=true;
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chan[c.chan].volChangedR=true;
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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_LEGATO: {
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chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val-12):(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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}
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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_AMIGA));
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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_BIFURCATOR_STATE_LOAD:
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rWrite(c.chan*8+c.value,c.value2);
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break;
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case DIV_CMD_BIFURCATOR_PARAMETER:
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rWrite(c.chan*8+2+c.value,c.value2);
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break;
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case DIV_CMD_GET_VOLMAX:
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return 255;
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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_CMD_MACRO_RESTART:
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chan[c.chan].std.restart(c.value);
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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 DivPlatformBifurcator::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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chan[ch].volChangedL=true;
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chan[ch].volChangedR=true;
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}
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void DivPlatformBifurcator::forceIns() {
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for (int i=0; i<4; i++) {
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chan[i].insChanged=true;
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chan[i].volChangedL=true;
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chan[i].volChangedR=true;
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chan[i].active=false;
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}
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}
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void* DivPlatformBifurcator::getChanState(int ch) {
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return &chan[ch];
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}
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DivDispatchOscBuffer* DivPlatformBifurcator::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformBifurcator::getRegisterPool() {
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return (unsigned char*)regPool;
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}
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int DivPlatformBifurcator::getRegisterPoolSize() {
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return 8*4;
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}
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void DivPlatformBifurcator::reset() {
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memset(regPool,0,8*4);
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for (int i=0; i<4; i++) {
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chan[i]=DivPlatformBifurcator::Channel();
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chan[i].std.setEngine(parent);
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rWrite(i*8,chan[i].curx&0xff);
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rWrite(i*8+1,chan[i].curx>>8);
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rWrite(i*8+2,chan[i].param&0xff);
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rWrite(i*8+3,chan[i].param>>8);
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}
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}
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int DivPlatformBifurcator::getOutputCount() {
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return 2;
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}
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DivMacroInt* DivPlatformBifurcator::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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unsigned short DivPlatformBifurcator::getPan(int ch) {
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return (chan[ch].chPanL<<8)|(chan[ch].chPanR);
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}
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void DivPlatformBifurcator::notifyInsChange(int ins) {
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for (int i=0; i<4; i++) {
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if (chan[i].ins==ins) {
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chan[i].insChanged=true;
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}
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}
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}
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void DivPlatformBifurcator::notifyInsDeletion(void* ins) {
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for (int i=0; i<4; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformBifurcator::setFlags(const DivConfig& flags) {
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chipClock=1000000;
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CHECK_CUSTOM_CLOCK;
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rate=chipClock/16;
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for (int i=0; i<4; i++) {
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oscBuf[i]->rate=rate;
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}
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}
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void DivPlatformBifurcator::poke(unsigned int addr, unsigned short val) {
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rWrite(addr,val);
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}
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void DivPlatformBifurcator::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 DivPlatformBifurcator::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
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parent=p;
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dumpWrites=false;
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skipRegisterWrites=false;
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for (int i=0; i<4; 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 4;
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}
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void DivPlatformBifurcator::quit() {
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for (int i=0; i<4; i++) {
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delete oscBuf[i];
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}
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}
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