405 lines
11 KiB
C++
405 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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#include "sm8521.h"
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#include "../engine.h"
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#include <math.h>
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//#define rWrite(a,v) pendingWrites[a]=v;
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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* regCheatSheetSM8521[]={
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"SGC", "40",
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"SG0L", "42",
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"SG1L", "44",
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"SG0TL", "46",
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"SG0TH", "47",
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"SG1TL", "48",
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"SG1TH", "49",
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"SG2L", "4A",
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"SG2TL", "4C",
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"SG2TH", "4D",
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"SGDA", "4E",
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"SG0Wn", "60+n",
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"SG1Wn", "70+n",
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NULL
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};
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const char** DivPlatformSM8521::getRegisterSheet() {
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return regCheatSheetSM8521;
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}
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void DivPlatformSM8521::acquire(short** buf, size_t len) {
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while (!writes.empty()) {
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QueuedWrite w=writes.front();
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sm8521_write(&sm8521,w.addr,w.val);
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regPool[w.addr&0xff]=w.val;
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writes.pop();
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}
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for (size_t h=0; h<len; h++) {
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sm8521_sound_tick(&sm8521,8);
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buf[0][h]=sm8521.out<<6;
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for (int i=0; i<2; i++) {
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oscBuf[i]->data[oscBuf[i]->needle++]=sm8521.sg[i].base.out<<7;
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}
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oscBuf[2]->data[oscBuf[2]->needle++]=sm8521.noise.base.out<<7;
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}
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}
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void DivPlatformSM8521::updateWave(int ch) {
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if (ch<2) {
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const unsigned char temp=regPool[0x40];
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rWrite(0x40,temp&~(1<<ch));
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for (int i=0; i<16; i++) {
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int nibble1=(chan[ch].ws.output[((i<<1)+chan[ch].antiClickWavePos-1)&31]-8)&0xf;
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int nibble2=(chan[ch].ws.output[((1+(i<<1))+chan[ch].antiClickWavePos-1)&31]-8)&0xf;
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rWrite(0x60+i+(ch*16),(nibble2<<4)|nibble1);
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}
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if (chan[ch].active) {
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rWrite(0x40,temp|(1<<ch));
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}
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chan[ch].antiClickWavePos&=31;
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}
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}
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void DivPlatformSM8521::tick(bool sysTick) {
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unsigned char keyState=0x80;
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for (int i=0; i<3; i++) {
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// anti-click
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/*
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if (antiClickEnabled && sysTick && chan[i].freq>0) {
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chan[i].antiClickPeriodCount+=(chipClock/MAX(parent->getCurHz(),1.0f));
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chan[i].antiClickWavePos+=chan[i].antiClickPeriodCount/chan[i].freq;
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chan[i].antiClickPeriodCount%=chan[i].freq;
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}
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*/
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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&31)*MIN(31,chan[i].std.vol.val))>>5;
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if (!isMuted[i]) {
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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].volumeChanged) {
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if (isMuted[i]) {
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rWrite(volMap[i],0);
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} else {
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rWrite(volMap[i],chan[i].outVol&0x1f);
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}
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chan[i].volumeChanged=false;
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}
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if (chan[i].std.wave.had) {
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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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if (!chan[i].keyOff) chan[i].keyOn=true;
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}
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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 && chan[i].std.phaseReset.val==1) {
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chan[i].antiClickWavePos=0;
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chan[i].antiClickPeriodCount=0;
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}
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if (chan[i].active) {
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if (chan[i].ws.tick() || (chan[i].std.phaseReset.had && chan[i].std.phaseReset.val==1)) {
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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)-1;
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if (chan[i].freq<1) chan[i].freq=1;
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if (chan[i].freq>4095) chan[i].freq=4095;
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rWrite(freqMap[i][0],chan[i].freq>>8);
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rWrite(freqMap[i][1],chan[i].freq&0xff);
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if (chan[i].keyOn) {
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}
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if (chan[i].keyOff) {
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}
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if (chan[i].keyOn) chan[i].keyOn=false;
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if (chan[i].keyOff) chan[i].keyOff=false;
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chan[i].freqChanged=false;
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}
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if (!isMuted[i] && chan[i].active) {
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keyState|=(1<<i);
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} else {
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keyState&=~(1<<i);
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}
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}
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if (regPool[0x40]!=keyState) {
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rWrite(0x40,keyState);
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regPool[0x40]=keyState;
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}
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}
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int DivPlatformSM8521::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_SM8521);
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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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if (!isMuted[c.chan]) {
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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].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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chan[c.chan].outVol=c.value;
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if (!isMuted[c.chan]) {
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chan[c.chan].volumeChanged=true;
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}
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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_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_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*((parent->song.linearPitch==2)?1:8);
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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*((parent->song.linearPitch==2)?1:8);
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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):(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_SM8521));
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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 31;
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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 DivPlatformSM8521::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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chan[ch].volumeChanged=true;
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if (mute) {
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rWrite(0x40,regPool[0x40]&~(1<<ch));
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} else if (chan[ch].active) {
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rWrite(0x40,regPool[0x40]|0x80|(1<<ch));
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}
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}
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void DivPlatformSM8521::forceIns() {
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for (int i=0; i<3; i++) {
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chan[i].insChanged=true;
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chan[i].freqChanged=true;
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updateWave(i);
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}
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}
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void* DivPlatformSM8521::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformSM8521::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivDispatchOscBuffer* DivPlatformSM8521::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformSM8521::getRegisterPool() {
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return regPool;
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}
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int DivPlatformSM8521::getRegisterPoolSize() {
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return 256;
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}
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void DivPlatformSM8521::reset() {
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while (!writes.empty()) writes.pop();
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memset(regPool,0,256);
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for (int i=0; i<3; i++) {
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chan[i]=DivPlatformSM8521::Channel();
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chan[i].std.setEngine(parent);
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chan[i].ws.setEngine(parent);
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chan[i].ws.init(NULL,32,15,false);
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}
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if (dumpWrites) {
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addWrite(0xffffffff,0);
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}
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sm8521_reset(&sm8521);
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rWrite(0x40,0x80); // initialize SGC
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}
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int DivPlatformSM8521::getOutputCount() {
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return 1;
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}
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bool DivPlatformSM8521::keyOffAffectsArp(int ch) {
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return true;
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}
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void DivPlatformSM8521::notifyWaveChange(int wave) {
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for (int i=0; i<2; i++) {
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if (chan[i].wave==wave) {
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chan[i].ws.changeWave1(wave);
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updateWave(i);
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}
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}
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}
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void DivPlatformSM8521::notifyInsDeletion(void* ins) {
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for (int i=0; i<3; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformSM8521::setFlags(const DivConfig& flags) {
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chipClock=11059200;
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CHECK_CUSTOM_CLOCK;
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antiClickEnabled=!flags.getBool("noAntiClick",false);
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rate=chipClock/4/8; // CKIN -> fCLK(/2) -> Function blocks (/2)
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for (int i=0; i<3; i++) {
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oscBuf[i]->rate=rate;
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}
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}
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void DivPlatformSM8521::poke(unsigned int addr, unsigned short val) {
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rWrite(addr,val);
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}
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void DivPlatformSM8521::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 DivPlatformSM8521::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<3; 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 6;
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}
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void DivPlatformSM8521::quit() {
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for (int i=0; i<3; i++) {
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delete oscBuf[i];
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}
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}
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DivPlatformSM8521::~DivPlatformSM8521() {
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}
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