diff options
Diffstat (limited to 'opl3.h')
| -rw-r--r-- | opl3.h | 159 |
1 files changed, 159 insertions, 0 deletions
@@ -0,0 +1,159 @@ +// +// Copyright (C) 2013-2018 Alexey Khokholov (Nuke.YKT) +// +// 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. +// +// +// 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. +// siliconpr0n.org(John McMaster, digshadow): +// YMF262 and VRC VII decaps and die shots. +// +// version: 1.8 +// + +#ifndef OPL_OPL3_H +#define OPL_OPL3_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <inttypes.h> + +#define OPL_WRITEBUF_SIZE 1024 +#define OPL_WRITEBUF_DELAY 2 + +typedef uintptr_t Bitu; +typedef intptr_t Bits; +typedef uint64_t Bit64u; +typedef int64_t Bit64s; +typedef uint32_t Bit32u; +typedef int32_t Bit32s; +typedef uint16_t Bit16u; +typedef int16_t Bit16s; +typedef uint8_t Bit8u; +typedef int8_t Bit8s; + +typedef struct _opl3_slot opl3_slot; +typedef struct _opl3_channel opl3_channel; +typedef struct _opl3_chip opl3_chip; + +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_reset; + Bit32u pg_phase; + Bit16u pg_phase_out; + Bit8u slot_num; +}; + +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; + Bit8u ch_num; +}; + +typedef struct _opl3_writebuf { + Bit64u time; + Bit16u reg; + Bit8u data; +} opl3_writebuf; + +struct _opl3_chip { + opl3_channel channel[18]; + opl3_slot slot[36]; + Bit16u timer; + Bit64u eg_timer; + Bit8u eg_timerrem; + Bit8u eg_state; + Bit8u eg_add; + Bit8u newm; + Bit8u nts; + Bit8u rhy; + Bit8u vibpos; + Bit8u vibshift; + Bit8u tremolo; + Bit8u tremolopos; + Bit8u tremoloshift; + Bit32u noise; + Bit16s zeromod; + Bit32s mixbuff[2]; + Bit8u rm_hh_bit2; + Bit8u rm_hh_bit3; + Bit8u rm_hh_bit7; + Bit8u rm_hh_bit8; + Bit8u rm_tc_bit3; + Bit8u rm_tc_bit5; + //OPL3L + Bit32s rateratio; + Bit32s samplecnt; + Bit16s oldsamples[2]; + Bit16s samples[2]; + + Bit64u writebuf_samplecnt; + Bit32u writebuf_cur; + Bit32u writebuf_last; + Bit64u writebuf_lasttime; + opl3_writebuf writebuf[OPL_WRITEBUF_SIZE]; +}; + +void OPL3_Generate(opl3_chip *chip, Bit16s *buf); +void OPL3_GenerateResampled(opl3_chip *chip, Bit16s *buf); +void OPL3_Reset(opl3_chip *chip, Bit32u samplerate); +void OPL3_WriteReg(opl3_chip *chip, Bit16u reg, Bit8u v); +void OPL3_WriteRegBuffered(opl3_chip *chip, Bit16u reg, Bit8u v); +void OPL3_GenerateStream(opl3_chip *chip, Bit16s *sndptr, Bit32u numsamples); + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif |