509 lines
14 KiB
C++
509 lines
14 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 "ga20.h"
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#include "../engine.h"
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#include "../../ta-log.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 CHIP_DIVIDER 64
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const char* regCheatSheetGA20[]={
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// on-chip
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"CHX_StartL", "X*8+0",
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"CHX_StartH", "X*8+1",
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"CHX_EndL", "X*8+2",
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"CHX_EndH", "X*8+3",
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"CHX_Freq", "X*8+4",
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"CHX_Volume", "X*8+5",
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"CHX_Control", "X*8+6",
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"CHX_Status", "X*8+7",
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NULL
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};
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const char** DivPlatformGA20::getRegisterSheet() {
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return regCheatSheetGA20;
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}
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inline void DivPlatformGA20::chWrite(unsigned char ch, unsigned int addr, unsigned char val) {
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if (!skipRegisterWrites) {
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if ((ch<4) && (addr<8)) {
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rWrite((ch<<3)+(addr&7),val);
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}
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}
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}
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void DivPlatformGA20::acquire(short** buf, size_t len) {
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if (ga20BufLen<len) {
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ga20BufLen=len;
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for (int i=0; i<4; i++) {
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delete[] ga20Buf[i];
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ga20Buf[i]=new short[ga20BufLen];
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}
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}
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for (size_t h=0; h<len; h++) {
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if ((--delay)<=0) {
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delay=MAX(0,delay);
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if (!writes.empty()) {
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QueuedWrite& w=writes.front();
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ga20.write(w.addr,w.val);
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regPool[w.addr]=w.val;
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writes.pop();
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delay=1;
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}
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}
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short *buffer[4]={
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&ga20Buf[0][h],
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&ga20Buf[1][h],
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&ga20Buf[2][h],
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&ga20Buf[3][h]
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};
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ga20.sound_stream_update(buffer,1);
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buf[0][h]=(signed int)(ga20Buf[0][h]+ga20Buf[1][h]+ga20Buf[2][h]+ga20Buf[3][h])>>2;
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for (int i=0; i<4; i++) {
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oscBuf[i]->data[oscBuf[i]->needle++]=ga20Buf[i][h]>>1;
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}
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}
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}
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u8 DivPlatformGA20::read_byte(u32 address) {
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if ((sampleMem!=NULL) && (address<getSampleMemCapacity())) {
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return sampleMem[address&0xfffff];
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}
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return 0;
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}
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void DivPlatformGA20::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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const signed char macroVol=VOL_SCALE_LOG((chan[i].vol&0xff),(0xff*MIN(chan[i].macroVolMul,chan[i].std.vol.val))/chan[i].macroVolMul,0xff);
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if (macroVol!=chan[i].outVol) {
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chan[i].outVol=macroVol;
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chan[i].volumeChanged=true;
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}
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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.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.phaseReset.had) {
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if (chan[i].std.phaseReset.val==1 && chan[i].active) {
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chan[i].audPos=0;
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chan[i].setPos=true;
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}
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}
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if (chan[i].volumeChanged) {
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chan[i].resVol=chan[i].outVol&0xff;
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chWrite(i,0x5,chan[i].resVol);
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chan[i].volumeChanged=false;
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}
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if (chan[i].setPos) {
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// force keyon
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chan[i].keyOn=true;
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chan[i].setPos=false;
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} else {
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chan[i].audPos=0;
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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double off=1.0;
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int sample=chan[i].sample;
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if (sample>=0 && sample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(sample);
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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/s->centerRate;
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}
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}
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DivSample* s=parent->getSample(chan[i].sample);
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chan[i].freq=0x100-(int)(off*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 (chan[i].freq>255) chan[i].freq=255;
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if (chan[i].freq<0) chan[i].freq=0;
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if (chan[i].keyOn) {
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unsigned int start=0;
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unsigned int end=0;
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if (chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
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start=sampleOffGA20[chan[i].sample]&0xfffff;
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end=start+s->length8;
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}
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if (chan[i].audPos>0) {
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start=start+MIN(chan[i].audPos,MIN(getSampleMemCapacity()-1,s->length8));
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}
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start=MIN(start,getSampleMemCapacity()-1);
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end=MIN(end,getSampleMemCapacity()-1);
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// force keyoff first
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chWrite(i,5,0);
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chWrite(i,6,0);
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// keyon
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if (chan[i].prevFreq!=chan[i].freq) {
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chWrite(i,4,chan[i].freq&0xff);
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chan[i].prevFreq=chan[i].freq;
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}
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chWrite(i,0,start>>4);
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chWrite(i,1,start>>12);
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chWrite(i,2,end>>4);
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chWrite(i,3,end>>12);
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chWrite(i,5,chan[i].resVol);
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chWrite(i,6,2);
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if (!chan[i].std.vol.had) {
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chan[i].outVol=chan[i].vol;
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chan[i].volumeChanged=true;
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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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chWrite(i,5,0);
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chWrite(i,6,0);
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chan[i].keyOff=false;
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}
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if (chan[i].freqChanged) {
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if (chan[i].prevFreq!=chan[i].freq) {
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chWrite(i,4,chan[i].freq&0xff);
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chan[i].prevFreq=chan[i].freq;
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}
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chan[i].freqChanged=false;
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}
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}
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}
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}
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int DivPlatformGA20::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_AMIGA);
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chan[c.chan].macroVolMul=ins->type==DIV_INS_AMIGA?64:255;
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].sample=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 (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
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}
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if (chan[c.chan].sample<0 || chan[c.chan].sample>=parent->song.sampleLen) {
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chan[c.chan].sample=-1;
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}
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if (c.value!=DIV_NOTE_NULL) {
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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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chan[c.chan].volumeChanged=true;
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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].sample=-1;
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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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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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chan[c.chan].volumeChanged=true;
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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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const 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_LEGATO: {
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chan[c.chan].baseFreq=NOTE_PERIODIC(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_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_SAMPLE_POS:
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chan[c.chan].audPos=c.value;
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chan[c.chan].setPos=true;
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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_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 DivPlatformGA20::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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ga20.set_mute(ch,mute);
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chan[ch].volumeChanged=true;
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}
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void DivPlatformGA20::forceIns() {
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while (!writes.empty()) writes.pop();
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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].volumeChanged=true;
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chan[i].freqChanged=true;
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chan[i].prevFreq=-1;
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}
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}
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void* DivPlatformGA20::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformGA20::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivSamplePos DivPlatformGA20::getSamplePos(int ch) {
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if (ch>=4) return DivSamplePos();
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if (chan[ch].sample<0 || chan[ch].sample>=parent->song.sampleLen) return DivSamplePos();
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if (!ga20.is_playing(ch)) return DivSamplePos();
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unsigned char f=chan[ch].freq;
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return DivSamplePos(
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chan[ch].sample,
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ga20.get_position(ch)-sampleOffGA20[chan[ch].sample],
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chipClock/(4*(0x100-(int)f))
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);
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}
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DivDispatchOscBuffer* DivPlatformGA20::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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void DivPlatformGA20::reset() {
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writes.clear();
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memset(regPool,0,32);
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ga20.device_reset();
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delay=0;
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for (int i=0; i<4; i++) {
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chan[i]=DivPlatformGA20::Channel();
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chan[i].std.setEngine(parent);
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// keyoff all channels
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chWrite(i,5,0);
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chWrite(i,6,0);
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if (isMuted[i]) ga20.set_mute(i,true);
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}
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}
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int DivPlatformGA20::getOutputCount() {
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return 1;
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}
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void DivPlatformGA20::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 DivPlatformGA20::notifyWaveChange(int wave) {
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// TODO when wavetables are added
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// TODO they probably won't be added unless the samples reside in RAM
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}
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void DivPlatformGA20::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 DivPlatformGA20::setFlags(const DivConfig& flags) {
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chipClock=COLOR_NTSC;
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CHECK_CUSTOM_CLOCK;
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rate=chipClock/4;
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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 DivPlatformGA20::poke(unsigned int addr, unsigned short val) {
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rWrite(addr&0x1f,val);
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}
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void DivPlatformGA20::poke(std::vector<DivRegWrite>& wlist) {
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for (DivRegWrite& i: wlist) rWrite(i.addr&0x1f,i.val);
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}
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unsigned char* DivPlatformGA20::getRegisterPool() {
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return regPool;
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}
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int DivPlatformGA20::getRegisterPoolSize() {
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return 32;
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}
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const void* DivPlatformGA20::getSampleMem(int index) {
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return index == 0 ? sampleMem : NULL;
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}
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size_t DivPlatformGA20::getSampleMemCapacity(int index) {
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return index == 0 ? 1048576 : 0;
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}
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size_t DivPlatformGA20::getSampleMemUsage(int index) {
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return index == 0 ? sampleMemLen : 0;
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}
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bool DivPlatformGA20::isSampleLoaded(int index, int sample) {
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if (index!=0) return false;
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if (sample<0 || sample>255) return false;
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return sampleLoaded[sample];
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}
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void DivPlatformGA20::renderSamples(int sysID) {
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memset(sampleMem,0x00,getSampleMemCapacity());
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memset(sampleOffGA20,0,256*sizeof(unsigned int));
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memset(sampleLoaded,0,256*sizeof(bool));
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size_t memPos=0;
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for (int i=0; i<parent->song.sampleLen; i++) {
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DivSample* s=parent->song.sample[i];
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if (!s->renderOn[0][sysID]) {
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sampleOffGA20[i]=0;
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continue;
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}
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const int length=s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT);
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int actualLength=MIN((int)(getSampleMemCapacity()-memPos)-1,length);
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if (actualLength>0) {
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sampleOffGA20[i]=memPos;
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for (int j=0; j<actualLength; j++) {
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// convert to 8 bit unsigned
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unsigned char val=((unsigned char)(s->data8[j]))^0x80;
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sampleMem[memPos++]=CLAMP(val,0x01,0xff);
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}
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// write end of sample marker
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memset(&sampleMem[memPos],0x00,1);
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memPos+=1;
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}
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if ((memPos+MAX(actualLength,0))>=(getSampleMemCapacity()-1)) {
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logW("out of GA20 PCM memory for sample %d!",i);
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break;
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} else {
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sampleLoaded[i]=true;
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}
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// allign to 16 byte
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memPos=(memPos+0xf)&~0xf;
|
|
}
|
|
sampleMemLen=memPos;
|
|
}
|
|
|
|
int DivPlatformGA20::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;
|
|
}
|
|
sampleMem=new unsigned char[getSampleMemCapacity()];
|
|
sampleMemLen=0;
|
|
delay=0;
|
|
setFlags(flags);
|
|
ga20BufLen=65536;
|
|
for (int i=0; i<4; i++) ga20Buf[i]=new short[ga20BufLen];
|
|
reset();
|
|
|
|
return 4;
|
|
}
|
|
|
|
void DivPlatformGA20::quit() {
|
|
delete[] sampleMem;
|
|
for (int i=0; i<4; i++) {
|
|
delete[] ga20Buf[i];
|
|
delete oscBuf[i];
|
|
}
|
|
}
|