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////////////////////////////////////////////////////////////////////////////////////////
//
// Nestopia - NES/Famicom emulator written in C++
//
// Copyright (C) 2003-2008 Martin Freij
//
// This file is part of Nestopia.
//
// Nestopia 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.
//
// Nestopia 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 Nestopia; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
////////////////////////////////////////////////////////////////////////////////////////
#ifndef NST_BOARD_KONAMI_VRC7_H
#define NST_BOARD_KONAMI_VRC7_H
#ifdef NST_PRAGMA_ONCE
#pragma once
#endif
namespace Nes
{
namespace Core
{
namespace Boards
{
namespace Konami
{
class Vrc7 : public Board
{
public:
explicit Vrc7(const Context&);
class Sound : public Apu::Channel
{
public:
explicit Sound(Apu&,bool=true);
void WriteReg(uint);
void SaveState(State::Saver&,dword) const;
void LoadState(State::Loader&);
protected:
void Reset();
bool UpdateSettings();
Sample GetSample();
private:
void ResetClock();
void Refresh();
enum
{
EG_PHASE_SHIFT = 15,
EG_MUTE = 0xFF,
EG_END = 0x7F,
PG_PHASE_SHIFT = 9,
WAVE_SIZE = 0x200,
WAVE_RANGE = WAVE_SIZE-1,
PITCH_SHIFT = 8,
PITCH_SIZE = 0x100,
PITCH_RANGE = 0xFFFF,
AMP_SHIFT = 8,
AMP_SIZE = 0x100,
AMP_RANGE = 0xFFFF,
LIN2LOG_SIZE = 0x80,
DB2LIN_SIZE = 0x400,
TL_SIZE = 0x40,
FEEDBACK_SHIFT = 8,
CLOCK_DIV = 3579545 / 72,
CLOCK_RATE = (1UL << 31) / CLOCK_DIV,
PG_PHASE_RANGE = (1UL << 18) - 1,
EG_BEGIN = 1UL << 22,
PITCH_RATE = 64UL * (1UL << 16) / CLOCK_DIV / 10,
AMP_RATE = 37UL * (1UL << 16) / CLOCK_DIV / 10
};
class Tables
{
public:
Tables();
inline uint GetAmp(uint) const;
inline uint GetPitch(uint) const;
inline uint GetSustainLevel(uint,uint,uint) const;
inline uint GetTotalLevel(uint,uint,uint,uint) const;
inline uint GetLog(uint) const;
inline dword GetAttack(uint,uint) const;
inline dword GetDecay(uint,uint) const;
inline dword GetSustain(uint,uint) const;
inline dword GetRelease(uint,uint) const;
inline dword GetPhase(uint,uint,uint) const;
inline Sample GetOutput(uint,uint,uint) const;
private:
word pitch[PITCH_SIZE];
byte amp[AMP_SIZE];
byte lin2log[LIN2LOG_SIZE];
dword adr[2][16][16];
word wave[2][WAVE_SIZE];
iword db2lin[DB2LIN_SIZE];
byte sl[2][8][2];
byte tl[16][8][TL_SIZE][4];
dword phase[512][8][16];
};
enum
{
NUM_OPLL_CHANNELS = 6
};
class OpllChannel
{
public:
void Reset();
void Update(const Tables&);
void SaveState(State::Saver&,dword) const;
void LoadState(State::Loader&,const Tables&);
NST_SINGLE_CALL void WriteReg0 (uint,const Tables&);
NST_SINGLE_CALL void WriteReg1 (uint,const Tables&);
NST_SINGLE_CALL void WriteReg2 (uint,const Tables&);
NST_SINGLE_CALL void WriteReg3 (uint);
NST_SINGLE_CALL void WriteReg4 (uint,const Tables&);
NST_SINGLE_CALL void WriteReg5 (uint,const Tables&);
NST_SINGLE_CALL void WriteReg6 (uint,const Tables&);
NST_SINGLE_CALL void WriteReg7 (uint,const Tables&);
NST_SINGLE_CALL void WriteReg8 (uint,const Tables&);
NST_SINGLE_CALL void WriteReg9 (uint,const Tables&);
NST_SINGLE_CALL void WriteRegA (uint,const Tables&);
NST_SINGLE_CALL Sample GetSample(uint,uint,const Tables&);
private:
void UpdatePhase (const Tables&,uint);
void UpdateSustainLevel (const Tables&,uint);
void UpdateTotalLevel (const Tables&,uint);
void UpdateEgPhase (const Tables&,uint);
enum Mode
{
EG_SETTLE,
EG_ATTACK,
EG_DECAY,
EG_HOLD,
EG_SUSTAIN,
EG_RELEASE,
EG_FINISH
};
enum
{
REG01_MULTIPLE = 0x0F,
REG01_RATE = 0x10,
REG01_HOLD = 0x20,
REG01_USE_VIBRATO = 0x40,
REG01_USE_AMP = 0x80,
REG2_TOTAL_LEVEL = 0x3F,
REG3_FEEDBACK = 0x07,
REG3_MODULATED_WAVE = 0x08,
REG3_CARRIER_WAVE = 0x10,
REG45_DECAY = 0x0F,
REG45_ATTACK = 0xF0,
REG67_RELEASE = 0x0F,
REG67_SUSTAIN_LEVEL = 0xF0,
REG8_FRQ_LO = 0xFF,
REG9_FRQ_HI = 0x01,
REG9_BLOCK = 0x0E,
REG9_KEY = 0x10,
REG9_SUSTAIN = 0x20,
REGA_VOLUME = 0x0F,
REGA_INSTRUMENT = 0xF0,
SUSTAIN_LEVEL_MAX = 0x100
};
struct Patch
{
enum { CUSTOM };
uint instrument;
byte tone[8];
byte custom[8];
static const byte preset[15][8];
};
enum
{
MODULATOR,
CARRIER,
NUM_SLOTS
};
uint frequency;
uint key;
uint sustain;
uint block;
uint volume;
Patch patch;
struct
{
struct
{
dword phase;
dword counter;
} pg;
struct
{
Mode mode;
dword phase;
dword counter;
} eg;
uint tl;
uint sl;
Sample output;
} slots[NUM_SLOTS];
Sample feedback;
};
uint output;
uint regSelect;
dword sampleRate;
dword samplePhase;
dword pitchPhase;
dword ampPhase;
Sample prevSample;
Sample nextSample;
OpllChannel channels[NUM_OPLL_CHANNELS];
const Tables tables;
public:
void SelectReg(uint data)
{
regSelect = data;
}
};
private:
void SubReset(bool);
void SubSave(State::Saver&) const;
void SubLoad(State::Loader&,dword);
void Sync(Event,Input::Controllers*);
NES_DECL_POKE( 9010 );
NES_DECL_POKE( 9030 );
NES_DECL_POKE( E000 );
NES_DECL_POKE( E008 );
NES_DECL_POKE( F000 );
NES_DECL_POKE( F008 );
Vrc4::Irq irq;
Sound sound;
};
}
}
}
}
#endif
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