mirror of
https://github.com/tildearrow/furnace.git
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582 lines
16 KiB
C++
582 lines
16 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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#include "swan.h"
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#include "../engine.h"
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#include <math.h>
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#define rWrite(a,v) if (!skipRegisterWrites) {writes.push(QueuedWrite(a,v)); if (dumpWrites) {addWrite(a,v);}}
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#define postWrite(a,v) postDACWrites.push(DivRegWrite(a,v));
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#define CHIP_DIVIDER 32
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const char* regCheatSheetWS[]={
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"CH1_Pitch", "00",
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"CH2_Pitch", "02",
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"CH3_Pitch", "04",
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"CH4_Pitch", "06",
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"CH1_Vol", "08",
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"CH2_Vol", "09",
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"CH3_Vol", "0A",
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"CH4_Vol", "0B",
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"Sweep_Value", "0C",
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"Sweep_Time", "0D",
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"Noise", "0E",
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"Wave_Base", "0F",
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"Ctrl", "10",
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"Output", "11",
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"Random", "12",
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"Voice_Ctrl", "14",
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"Wave_Mem", "40",
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NULL
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};
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const char** DivPlatformSwan::getRegisterSheet() {
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return regCheatSheetWS;
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}
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void DivPlatformSwan::acquire(short** buf, size_t len) {
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for (size_t h=0; h<len; h++) {
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// PCM part
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if (pcm && dacSample!=-1) {
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dacPeriod+=dacRate;
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while (dacPeriod>rate) {
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DivSample* s=parent->getSample(dacSample);
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if (s->samples<=0) {
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dacSample=-1;
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dacPeriod=0;
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break;
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}
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rWrite(0x09,(unsigned char)s->data8[dacPos++]+0x80);
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if (s->isLoopable() && dacPos>=(unsigned int)s->loopEnd) {
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dacPos=s->loopStart;
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} else if (dacPos>=s->samples) {
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dacSample=-1;
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}
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dacPeriod-=rate;
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}
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}
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// the rest
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while (!writes.empty()) {
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QueuedWrite w=writes.front();
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regPool[w.addr]=w.val;
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if (w.addr<0x40) ws->SoundWrite(w.addr|0x80,w.val);
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else ws->RAMWrite(w.addr&0x3f,w.val);
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writes.pop();
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}
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int16_t samp[2]{0, 0};
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ws->SoundUpdate(16);
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ws->SoundFlush(samp, 1);
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buf[0][h]=samp[0];
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buf[1][h]=samp[1];
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for (int i=0; i<4; i++) {
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oscBuf[i]->data[oscBuf[i]->needle++]=(ws->sample_cache[i][0]+ws->sample_cache[i][1])<<6;
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}
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}
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}
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void DivPlatformSwan::updateWave(int ch) {
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unsigned char addr=0x40+ch*16;
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for (int i=0; i<16; i++) {
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int nibble1=chan[ch].ws.output[i<<1];
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int nibble2=chan[ch].ws.output[1+(i<<1)];
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rWrite(addr+i,nibble1|(nibble2<<4));
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}
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}
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void DivPlatformSwan::calcAndWriteOutVol(int ch, int env) {
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int vl=chan[ch].vol*((chan[ch].pan>>4)&0x0f)*env/225;
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int vr=chan[ch].vol*(chan[ch].pan&0x0f)*env/225;
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if (ch==1&&pcm) {
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vl=(vl>0)?((vl>7)?3:2):0;
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vr=(vr>0)?((vr>7)?3:2):0;
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chan[1].outVol=vr|(vl<<2);
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} else {
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chan[ch].outVol=vr|(vl<<4);
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}
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writeOutVol(ch);
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}
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void DivPlatformSwan::writeOutVol(int ch) {
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unsigned char val=isMuted[ch]?0:chan[ch].outVol;
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if (ch==1&&pcm) {
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rWrite(0x14,val)
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} else {
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rWrite(0x08+ch,val);
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}
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}
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void DivPlatformSwan::tick(bool sysTick) {
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unsigned char sndCtrl=(pcm?0x20:0)|(sweep?0x40:0)|((noise>0)?0x80:0);
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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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int env=chan[i].std.vol.val;
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if(parent->getIns(chan[i].ins,DIV_INS_SWAN)->type==DIV_INS_AMIGA) {
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env=MIN(env/4,15);
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}
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calcAndWriteOutVol(i,env);
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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_PERIODIC(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.wave.had && !(i==1 && pcm)) {
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if (chan[i].wave!=chan[i].std.wave.val || chan[i].ws.activeChanged()) {
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chan[i].wave=chan[i].std.wave.val;
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chan[i].ws.changeWave1(chan[i].wave);
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}
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}
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if (chan[i].std.panL.had) {
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chan[i].pan&=0x0f;
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chan[i].pan|=(chan[i].std.panL.val&15)<<4;
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}
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if (chan[i].std.panR.had) {
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chan[i].pan&=0xf0;
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chan[i].pan|=chan[i].std.panR.val&15;
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}
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if (chan[i].std.panL.had || chan[i].std.panR.had) {
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calcAndWriteOutVol(i,chan[i].std.vol.will?chan[i].std.vol.val:15);
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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].active) {
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sndCtrl|=(1<<i);
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if (chan[i].ws.tick()) {
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updateWave(i);
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}
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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,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
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if (i==1 && pcm && furnaceDac) {
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double off=1.0;
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if (dacSample>=0 && dacSample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(dacSample);
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if (s->centerRate<1) {
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off=1.0;
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} else {
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off=8363.0/(double)s->centerRate;
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}
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}
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dacRate=((double)chipClock/2)/MAX(1,off*chan[i].freq);
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if (dumpWrites) postWrite(0xffff0001,dacRate);
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}
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if (chan[i].freq>2048) chan[i].freq=2048;
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if (chan[i].freq<1) chan[i].freq=1;
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int rVal=2048-chan[i].freq;
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rWrite(i*2,rVal&0xff);
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rWrite(i*2+1,rVal>>8);
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if (chan[i].keyOn) {
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if (!chan[i].std.vol.will) {
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calcAndWriteOutVol(i,15);
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}
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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].keyOff=false;
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}
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chan[i].freqChanged=false;
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}
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}
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if (chan[3].std.duty.had) {
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if (noise!=chan[3].std.duty.val) {
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noise=chan[3].std.duty.val;
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if (noise>0) {
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rWrite(0x0e,((noise-1)&0x07)|0x18);
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sndCtrl|=0x80;
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} else {
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sndCtrl&=~0x80;
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}
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}
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}
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if (chan[3].std.phaseReset.had) {
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if (noise>0) {
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rWrite(0x0e,((noise-1)&0x07)|0x18);
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sndCtrl|=0x80;
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} else {
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sndCtrl&=~0x80;
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}
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}
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unsigned char origSndCtrl=sndCtrl;
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bool phaseResetHappens=false;
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for (int i=0; i<4; i++) {
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if (chan[i].std.phaseReset.had) {
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phaseResetHappens=true;
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sndCtrl&=~(1<<i);
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}
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}
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if (phaseResetHappens) {
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rWrite(0x10,sndCtrl);
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sndCtrl=origSndCtrl;
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}
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rWrite(0x10,sndCtrl);
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while (!postDACWrites.empty()) {
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const DivRegWrite& w=postDACWrites.back();
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if (dumpWrites) addWrite(w.addr,w.val);
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postDACWrites.pop();
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}
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}
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int DivPlatformSwan::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_SWAN);
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if (c.chan==1) {
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if (ins->type==DIV_INS_AMIGA || ins->amiga.useSample) {
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pcm=true;
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} else if (furnaceDac) {
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pcm=false;
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}
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if (pcm) {
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if (skipRegisterWrites) break;
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dacPos=0;
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dacPeriod=0;
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if (ins->type==DIV_INS_AMIGA || ins->amiga.useSample) {
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if (c.value!=DIV_NOTE_NULL) {
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dacSample=ins->amiga.getSample(c.value);
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c.value=ins->amiga.getFreq(c.value);
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}
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if (dacSample<0 || dacSample>=parent->song.sampleLen) {
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dacSample=-1;
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if (dumpWrites) postWrite(0xffff0002,0);
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break;
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} else {
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if (dumpWrites) {
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postWrite(0xffff0000,dacSample);
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}
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}
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if (c.value!=DIV_NOTE_NULL) {
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chan[1].baseFreq=NOTE_PERIODIC(c.value);
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chan[1].freqChanged=true;
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chan[1].note=c.value;
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}
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chan[1].active=true;
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chan[1].keyOn=true;
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chan[1].macroInit(ins);
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furnaceDac=true;
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} else {
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if (c.value!=DIV_NOTE_NULL) {
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chan[1].note=c.value;
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}
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dacSample=12*sampleBank+chan[1].note%12;
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if (dacSample>=parent->song.sampleLen) {
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dacSample=-1;
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if (dumpWrites) postWrite(0xffff0002,0);
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break;
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} else {
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if (dumpWrites) postWrite(0xffff0000,dacSample);
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}
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dacRate=parent->getSample(dacSample)->rate;
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if (dumpWrites) {
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postWrite(0xffff0001,dacRate);
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}
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chan[1].active=true;
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chan[1].keyOn=true;
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furnaceDac=false;
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}
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break;
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}
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}
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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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}
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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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if (chan[c.chan].wave<0) {
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chan[c.chan].wave=0;
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chan[c.chan].ws.changeWave1(chan[c.chan].wave);
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}
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chan[c.chan].ws.init(ins,32,15,chan[c.chan].insChanged);
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chan[c.chan].insChanged=false;
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break;
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}
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case DIV_CMD_NOTE_OFF:
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if (c.chan==1&&pcm) {
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dacSample=-1;
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if (dumpWrites) postWrite(0xffff0002,0);
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pcm=false;
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}
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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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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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calcAndWriteOutVol(c.chan,15);
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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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return chan[c.chan].vol;
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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_WAVE:
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chan[c.chan].wave=c.value;
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chan[c.chan].ws.changeWave1(chan[c.chan].wave);
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chan[c.chan].keyOn=true;
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break;
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case DIV_CMD_WS_SWEEP_TIME:
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if (c.chan==2) {
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if (c.value==0) {
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sweep=false;
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} else {
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sweep=true;
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rWrite(0x0d,(c.value-1)&0xff);
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}
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}
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break;
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case DIV_CMD_WS_SWEEP_AMOUNT:
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if (c.chan==2) {
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rWrite(0x0c,c.value&0xff);
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}
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break;
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case DIV_CMD_NOTE_PORTA: {
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int destFreq=NOTE_PERIODIC(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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if (c.chan==3) {
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noise=c.value&0xff;
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if (noise>0) rWrite(0x0e,((noise-1)&0x07)|0x18);
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}
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break;
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case DIV_CMD_SAMPLE_MODE:
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if (c.chan==1) pcm=c.value;
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break;
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case DIV_CMD_SAMPLE_BANK:
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sampleBank=c.value;
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if (sampleBank>(parent->song.sample.size()/12)) {
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sampleBank=parent->song.sample.size()/12;
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}
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break;
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case DIV_CMD_PANNING: {
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chan[c.chan].pan=(c.value&0xf0)|(c.value2>>4);
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calcAndWriteOutVol(c.chan,chan[c.chan].std.vol.will?chan[c.chan].std.vol.val:15);
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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_PERIODIC(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_SWAN));
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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_PERIODIC(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 15;
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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 DivPlatformSwan::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 DivPlatformSwan::forceIns() {
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noise=0;
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for (int i=0; i<4; i++) {
|
|
chan[i].insChanged=true;
|
|
chan[i].freqChanged=true;
|
|
updateWave(i);
|
|
writeOutVol(i);
|
|
}
|
|
}
|
|
|
|
void* DivPlatformSwan::getChanState(int ch) {
|
|
return &chan[ch];
|
|
}
|
|
|
|
DivMacroInt* DivPlatformSwan::getChanMacroInt(int ch) {
|
|
return &chan[ch].std;
|
|
}
|
|
|
|
DivDispatchOscBuffer* DivPlatformSwan::getOscBuffer(int ch) {
|
|
return oscBuf[ch];
|
|
}
|
|
|
|
unsigned char* DivPlatformSwan::getRegisterPool() {
|
|
// get Random from emulator
|
|
regPool[0x12]=ws->SoundRead(0x92);
|
|
regPool[0x13]=ws->SoundRead(0x93);
|
|
return regPool;
|
|
}
|
|
|
|
int DivPlatformSwan::getRegisterPoolSize() {
|
|
return 128;
|
|
}
|
|
|
|
void DivPlatformSwan::reset() {
|
|
while (!writes.empty()) writes.pop();
|
|
while (!postDACWrites.empty()) postDACWrites.pop();
|
|
memset(regPool,0,128);
|
|
for (int i=0; i<4; i++) {
|
|
chan[i]=Channel();
|
|
chan[i].vol=15;
|
|
chan[i].pan=0xff;
|
|
chan[i].std.setEngine(parent);
|
|
chan[i].ws.setEngine(parent);
|
|
chan[i].ws.init(NULL,32,15,false);
|
|
rWrite(0x08+i,0xff);
|
|
}
|
|
if (dumpWrites) {
|
|
addWrite(0xffffffff,0);
|
|
}
|
|
ws->SoundReset();
|
|
pcm=false;
|
|
sweep=false;
|
|
furnaceDac=false;
|
|
noise=0;
|
|
dacPeriod=0;
|
|
dacRate=0;
|
|
dacPos=0;
|
|
dacSample=-1;
|
|
sampleBank=0;
|
|
rWrite(0x0f,0x00); // wave table at 0x0000
|
|
rWrite(0x11,0x09); // enable speakers
|
|
}
|
|
|
|
int DivPlatformSwan::getOutputCount() {
|
|
return 2;
|
|
}
|
|
|
|
void DivPlatformSwan::notifyWaveChange(int wave) {
|
|
for (int i=0; i<4; i++) {
|
|
if (chan[i].wave==wave) {
|
|
chan[i].ws.changeWave1(wave);
|
|
updateWave(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
void DivPlatformSwan::notifyInsDeletion(void* ins) {
|
|
for (int i=0; i<4; i++) {
|
|
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
|
|
}
|
|
}
|
|
|
|
void DivPlatformSwan::poke(unsigned int addr, unsigned short val) {
|
|
rWrite(addr,val);
|
|
}
|
|
|
|
void DivPlatformSwan::poke(std::vector<DivRegWrite>& wlist) {
|
|
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
|
|
}
|
|
|
|
void DivPlatformSwan::setFlags(const DivConfig& flags) {
|
|
chipClock=3072000;
|
|
CHECK_CUSTOM_CLOCK;
|
|
rate=chipClock/16; // = 192000kHz, should be enough
|
|
for (int i=0; i<4; i++) {
|
|
oscBuf[i]->rate=rate;
|
|
}
|
|
}
|
|
|
|
int DivPlatformSwan::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
|
|
parent=p;
|
|
dumpWrites=false;
|
|
skipRegisterWrites=false;
|
|
for (int i=0; i<4; i++) {
|
|
isMuted[i]=false;
|
|
oscBuf[i]=new DivDispatchOscBuffer;
|
|
}
|
|
ws=new WSwan();
|
|
setFlags(flags);
|
|
reset();
|
|
return 4;
|
|
}
|
|
|
|
void DivPlatformSwan::quit() {
|
|
for (int i=0; i<4; i++) {
|
|
delete oscBuf[i];
|
|
}
|
|
delete ws;
|
|
}
|
|
|
|
DivPlatformSwan::~DivPlatformSwan() {
|
|
}
|