furnace/src/engine/platform/nes.h

106 lines
3.2 KiB
C++

/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2023 tildearrow and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _NES_H
#define _NES_H
#include "../dispatch.h"
#include "sound/nes_nsfplay/nes_apu.h"
class DivPlatformNES: public DivDispatch {
struct Channel: public SharedChannel<signed char> {
int prevFreq;
unsigned char duty, sweep, envMode, len;
bool sweepChanged, furnaceDac;
Channel():
SharedChannel<signed char>(15),
prevFreq(65535),
duty(0),
sweep(8),
envMode(3),
len(0x1f),
sweepChanged(false),
furnaceDac(false) {}
};
Channel chan[5];
DivDispatchOscBuffer* oscBuf[5];
bool isMuted[5];
int dacPeriod, dacRate;
unsigned int dacPos, dacAntiClick;
int dacSample;
unsigned char* dpcmMem;
size_t dpcmMemLen;
bool sampleLoaded[256];
unsigned char dpcmBank;
unsigned char sampleBank;
unsigned char writeOscBuf;
unsigned char apuType;
bool dpcmMode;
bool dacAntiClickOn;
bool useNP;
bool goingToLoop;
bool countMode;
struct NESAPU* nes;
xgm::NES_APU* nes1_NP;
xgm::NES_DMC* nes2_NP;
unsigned char regPool[128];
unsigned int sampleOffDPCM[256];
friend void putDispatchChip(void*,int);
friend void putDispatchChan(void*,int,int);
void doWrite(unsigned short addr, unsigned char data);
unsigned char calcDPCMRate(int inRate);
void acquire_puNES(short** buf, size_t len);
void acquire_NSFPlay(short** buf, size_t len);
public:
void acquire(short** buf, size_t len);
int dispatch(DivCommand c);
void* getChanState(int chan);
DivMacroInt* getChanMacroInt(int ch);
DivDispatchOscBuffer* getOscBuffer(int chan);
unsigned char* getRegisterPool();
int getRegisterPoolSize();
void reset();
void forceIns();
void tick(bool sysTick=true);
void muteChannel(int ch, bool mute);
bool keyOffAffectsArp(int ch);
float getPostAmp();
unsigned char readDMC(unsigned short addr);
void setNSFPlay(bool use);
void setFlags(const DivConfig& flags);
void notifyInsDeletion(void* ins);
void poke(unsigned int addr, unsigned short val);
void poke(std::vector<DivRegWrite>& wlist);
const char** getRegisterSheet();
const void* getSampleMem(int index);
size_t getSampleMemCapacity(int index);
size_t getSampleMemUsage(int index);
bool isSampleLoaded(int index, int sample);
void renderSamples(int chipID);
int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
void quit();
~DivPlatformNES();
};
#endif