157 lines
4.4 KiB
C++
157 lines
4.4 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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#ifndef _AMIGA_H
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#define _AMIGA_H
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#include "../dispatch.h"
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#include "../waveSynth.h"
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class DivPlatformAmiga: public DivDispatch {
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struct Channel: public SharedChannel<signed char> {
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unsigned short audLen, irLocL, irLocH, irLen;
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unsigned int audPos;
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int audSub;
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unsigned char volPos;
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int sample, wave;
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bool useWave, setPos, useV, useP, dmaOn, audDatClock, writeVol, updateWave;
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DivWaveSynth ws;
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Channel():
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SharedChannel<signed char>(64),
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audLen(0),
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irLocL(0),
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irLocH(0),
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irLen(2),
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audPos(0),
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audSub(0),
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volPos(0),
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sample(-1),
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wave(-1),
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useWave(false),
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setPos(false),
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useV(false),
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useP(false),
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dmaOn(false),
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audDatClock(false),
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writeVol(true),
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updateWave(true) {}
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};
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Channel chan[4];
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DivDispatchOscBuffer* oscBuf[4];
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bool isMuted[4];
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bool bypassLimits;
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bool amigaModel;
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bool filterOn;
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bool updateADKCon;
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struct Amiga {
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// register state
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bool audInt[4]; // interrupt on
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bool audIr[4]; // interrupt request
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bool audEn[4]; // audio DMA on
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bool useP[4]; // period modulation
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bool useV[4]; // volume modulation
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bool dmaEn;
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unsigned int audLoc[4]; // address
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unsigned short audLen[4]; // length
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unsigned short audPer[4]; // period
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unsigned char audVol[4]; // volume
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signed char audDat[2][4]; // data
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signed char nextOut[4];
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unsigned short nextOut2[4];
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// internal state
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int audTick[4]; // tick of period
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unsigned int dmaLoc[4]; // address
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unsigned short dmaLen[4]; // position
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bool audByte[4]; // which byte of audDat to output
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bool audWord[4]; // for P/V
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bool incLoc[4]; // whether dmaLoc/dmaLen should be updated
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unsigned char volPos; // position of volume PWM
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unsigned short hPos; // horizontal position of beam
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unsigned char state[4]; // current channel state
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Amiga() {
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memset(this,0,sizeof(*this));
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}
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} amiga;
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int filter[2][4];
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int filtConst;
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int filtConstOff, filtConstOn;
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int chipMem, chipMask;
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unsigned char volTable[64][64];
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unsigned int sampleOff[256];
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bool sampleLoaded[256];
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unsigned short regPool[256];
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unsigned char* sampleMem;
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size_t sampleMemLen;
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int sep1, sep2;
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friend void putDispatchChip(void*,int);
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friend void putDispatchChan(void*,int,int);
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friend class DivExportAmigaValidation;
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void irq(int ch);
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void rWrite(unsigned short addr, unsigned short val);
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void updateWave(int ch);
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public:
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void acquire(short** buf, size_t len);
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int dispatch(DivCommand c);
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void* getChanState(int chan);
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DivDispatchOscBuffer* getOscBuffer(int chan);
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unsigned char* getRegisterPool();
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int getRegisterPoolSize();
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int getRegisterPoolDepth();
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void reset();
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void forceIns();
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void tick(bool sysTick=true);
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void muteChannel(int ch, bool mute);
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int getOutputCount();
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bool keyOffAffectsArp(int ch);
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DivMacroInt* getChanMacroInt(int ch);
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DivSamplePos getSamplePos(int ch);
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void setFlags(const DivConfig& flags);
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void notifyInsChange(int ins);
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void notifyWaveChange(int wave);
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void notifyInsDeletion(void* ins);
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void renderSamples(int chipID);
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void poke(unsigned int addr, unsigned short val);
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void poke(std::vector<DivRegWrite>& wlist);
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const char** getRegisterSheet();
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const void* getSampleMem(int index=0);
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size_t getSampleMemCapacity(int index=0);
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size_t getSampleMemUsage(int index=0);
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bool isSampleLoaded(int index, int sample);
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int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
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void quit();
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};
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#endif
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