175 lines
4.2 KiB
C
175 lines
4.2 KiB
C
/* Nuked OPL3
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* Copyright (C) 2013-2020 Nuke.YKT
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*
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* This file is part of Nuked OPL3.
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*
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* Nuked OPL3 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 2.1
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* of the License, or (at your option) any later version.
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*
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* Nuked OPL3 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Nuked OPL3. If not, see <https://www.gnu.org/licenses/>.
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* Nuked OPL3 emulator.
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* Thanks:
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* MAME Development Team(Jarek Burczynski, Tatsuyuki Satoh):
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* Feedback and Rhythm part calculation information.
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* forums.submarine.org.uk(carbon14, opl3):
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* Tremolo and phase generator calculation information.
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* OPLx decapsulated(Matthew Gambrell, Olli Niemitalo):
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* OPL2 ROMs.
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* siliconpr0n.org(John McMaster, digshadow):
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* YMF262 and VRC VII decaps and die shots.
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*
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* version: 1.8
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*/
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#ifndef OPL_OPL3_H
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#define OPL_OPL3_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <inttypes.h>
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#ifndef OPL_ENABLE_STEREOEXT
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#define OPL_ENABLE_STEREOEXT 0
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#endif
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#define OPL_WRITEBUF_SIZE 1024
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#define OPL_WRITEBUF_DELAY 2
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typedef struct _opl3_slot opl3_slot;
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typedef struct _opl3_channel opl3_channel;
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typedef struct _opl3_chip opl3_chip;
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struct _opl3_slot {
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opl3_channel *channel;
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opl3_chip *chip;
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int16_t out;
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int16_t fbmod;
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int16_t *mod;
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int16_t prout;
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uint16_t eg_rout;
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uint16_t eg_out;
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uint8_t eg_inc;
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uint8_t eg_gen;
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uint8_t eg_rate;
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uint8_t eg_ksl;
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uint8_t *trem;
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uint8_t reg_vib;
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uint8_t reg_type;
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uint8_t reg_ksr;
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uint8_t reg_mult;
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uint8_t reg_ksl;
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uint8_t reg_tl;
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uint8_t reg_ar;
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uint8_t reg_dr;
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uint8_t reg_sl;
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uint8_t reg_rr;
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uint8_t reg_wf;
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uint8_t key;
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uint32_t pg_reset;
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uint32_t pg_phase;
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uint16_t pg_phase_out;
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uint8_t slot_num;
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};
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struct _opl3_channel {
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opl3_slot *slots[2];
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opl3_channel *pair;
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opl3_chip *chip;
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int16_t *out[4];
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#if OPL_ENABLE_STEREOEXT
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int32_t leftpan;
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int32_t rightpan;
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#endif
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uint8_t chtype;
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uint16_t f_num;
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uint8_t block;
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uint8_t fb;
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uint8_t con;
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uint8_t alg;
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uint8_t ksv;
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uint16_t cha, chb;
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uint16_t chc, chd;
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uint8_t ch_num;
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uint8_t muted;
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};
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typedef struct _opl3_writebuf {
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uint64_t time;
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uint16_t reg;
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uint8_t data;
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} opl3_writebuf;
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struct _opl3_chip {
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opl3_channel channel[18];
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opl3_slot slot[36];
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uint16_t timer;
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uint64_t eg_timer;
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uint8_t eg_timerrem;
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uint8_t eg_state;
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uint8_t eg_add;
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uint8_t newm;
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uint8_t nts;
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uint8_t rhy;
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uint8_t vibpos;
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uint8_t vibshift;
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uint8_t tremolo;
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uint8_t tremolopos;
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uint8_t tremoloshift;
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uint32_t noise;
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int16_t zeromod;
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int32_t mixbuff[4];
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uint8_t rm_hh_bit2;
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uint8_t rm_hh_bit3;
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uint8_t rm_hh_bit7;
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uint8_t rm_hh_bit8;
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uint8_t rm_tc_bit3;
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uint8_t rm_tc_bit5;
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#if OPL_ENABLE_STEREOEXT
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uint8_t stereoext;
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#endif
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/* OPL3L */
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int32_t rateratio;
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int32_t samplecnt;
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int16_t oldsamples[4];
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int16_t samples[4];
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uint64_t writebuf_samplecnt;
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uint32_t writebuf_cur;
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uint32_t writebuf_last;
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uint64_t writebuf_lasttime;
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opl3_writebuf writebuf[OPL_WRITEBUF_SIZE];
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};
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void OPL3_Generate(opl3_chip *chip, int16_t *buf);
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void OPL3_GenerateResampled(opl3_chip *chip, int16_t *buf);
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void OPL3_Reset(opl3_chip *chip, uint32_t samplerate);
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void OPL3_Resample(opl3_chip *chip, uint32_t samplerate);
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void OPL3_WriteReg(opl3_chip *chip, uint16_t reg, uint8_t v);
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void OPL3_WriteRegBuffered(opl3_chip *chip, uint16_t reg, uint8_t v);
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void OPL3_GenerateStream(opl3_chip *chip, int16_t *sndptr, uint32_t numsamples);
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void OPL3_Generate4Ch(opl3_chip *chip, int16_t *buf4);
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void OPL3_Generate4ChResampled(opl3_chip *chip, int16_t *buf4);
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void OPL3_Generate4ChStream(opl3_chip *chip, int16_t *sndptr1, int16_t *sndptr2, uint32_t numsamples);
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#ifdef __cplusplus
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}
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#endif
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#endif
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