/* Copyright holders: Alexey Khokholov (Nuke.YKT)
   see COPYING for more details
*/

//
//  Nuked OPL3 emulator.
//  Thanks:
//      MAME Development Team(Jarek Burczynski, Tatsuyuki Satoh):
//          Feedback and Rhythm part calculation information.
//      forums.submarine.org.uk(carbon14, opl3):
//          Tremolo and phase generator calculation information.
//      OPLx decapsulated(Matthew Gambrell, Olli Niemitalo):
//          OPL2 ROMs.
//

#ifndef NUKEDOPL_H
#define NUKEDOPL_H

//#include "dosbox.h"
#include <stdint.h>
typedef signed int Bits;
typedef unsigned int Bitu;
typedef int8_t   Bit8s;
typedef uint8_t  Bit8u;
typedef int16_t  Bit16s;
typedef uint16_t Bit16u;
typedef int32_t  Bit32s;
typedef uint32_t Bit32u;

struct opl3_chip;
struct opl3_slot;
struct opl3_channel;

struct opl3_slot {
    opl3_channel *channel;
    opl3_chip *chip;
    Bit16s out;
    Bit16s fbmod;
    Bit16s *mod;
    Bit16s prout;
    Bit16s eg_rout;
    Bit16s eg_out;
    Bit8u eg_inc;
    Bit8u eg_gen;
    Bit8u eg_rate;
    Bit8u eg_ksl;
    Bit8u *trem;
    Bit8u reg_vib;
    Bit8u reg_type;
    Bit8u reg_ksr;
    Bit8u reg_mult;
    Bit8u reg_ksl;
    Bit8u reg_tl;
    Bit8u reg_ar;
    Bit8u reg_dr;
    Bit8u reg_sl;
    Bit8u reg_rr;
    Bit8u reg_wf;
    Bit8u key;
    Bit32u pg_phase;
    Bit32u timer;
};

struct opl3_channel {
    opl3_slot *slots[2];
    opl3_channel *pair;
    opl3_chip *chip;
    Bit16s *out[4];
    Bit8u chtype;
    Bit16u f_num;
    Bit8u block;
    Bit8u fb;
    Bit8u con;
    Bit8u alg;
    Bit8u ksv;
    Bit16u cha, chb;
};

struct opl3_chip {
    opl3_channel channel[18];
    opl3_slot slot[36];
    Bit16u timer;
    Bit8u newm;
    Bit8u nts;
    Bit8u rhy;
    Bit8u vibpos;
    Bit8u vibshift;
    Bit8u tremolo;
    Bit8u tremolopos;
    Bit8u tremoloshift;
    Bit32u noise;
    Bit16s zeromod;
    Bit32s mixbuff[2];

    Bit32s rateratio;
    Bit32s samplecnt;
    Bit16s oldsamples[2];
    Bit16s samples[2];
};

void OPL3_Generate(opl3_chip *chip, Bit16s *buf);
void OPL3_GenerateResampled(opl3_chip *chip, Bit16s *buf);
void OPL3_Reset(opl3_chip *chip, Bit32u samplerate);
Bit32u OPL3_WriteAddr(opl3_chip *chip, Bit32u port, Bit8u val);
void OPL3_WriteReg(opl3_chip *chip, Bit16u reg, Bit8u v);
void OPL3_GenerateStream(opl3_chip *chip, Bit16s *sndptr, Bit32u numsamples);
#endif