mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-24 05:25:12 +00:00
237 lines
6.1 KiB
C
237 lines
6.1 KiB
C
#ifndef _EMU2413_H_
|
|
#define _EMU2413_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define OPLL_DEBUG 0
|
|
|
|
enum OPLL_TONE_ENUM { OPLL_2413_TONE = 0, OPLL_VRC7_TONE = 1, OPLL_281B_TONE = 2, OPLL_2423_TONE = 3 };
|
|
|
|
/* voice data */
|
|
typedef struct __OPLL_PATCH {
|
|
uint32_t TL, FB, EG, ML, AR, DR, SL, RR, KR, KL, AM, PM, WS;
|
|
} OPLL_PATCH;
|
|
|
|
/* slot */
|
|
typedef struct __OPLL_SLOT {
|
|
uint8_t number;
|
|
|
|
/* type flags:
|
|
* 000000SM
|
|
* |+-- M: 0:modulator 1:carrier
|
|
* +--- S: 0:normal 1:single slot mode (sd, tom, hh or cym)
|
|
*/
|
|
uint8_t type;
|
|
|
|
OPLL_PATCH *patch; /* voice parameter */
|
|
|
|
/* slot output */
|
|
int32_t output[2]; /* output value, latest and previous. */
|
|
|
|
/* phase generator (pg) */
|
|
uint16_t *wave_table; /* wave table */
|
|
uint32_t pg_phase; /* pg phase */
|
|
uint32_t pg_out; /* pg output, as index of wave table */
|
|
uint8_t pg_keep; /* if 1, pg_phase is preserved when key-on */
|
|
uint16_t blk_fnum; /* (block << 9) | f-number */
|
|
uint16_t fnum; /* f-number (9 bits) */
|
|
uint8_t blk; /* block (3 bits) */
|
|
|
|
/* envelope generator (eg) */
|
|
uint8_t eg_state; /* current state */
|
|
int32_t volume; /* current volume */
|
|
uint8_t key_flag; /* key-on flag 1:on 0:off */
|
|
uint8_t sus_flag; /* key-sus option 1:on 0:off */
|
|
uint16_t tll; /* total level + key scale level*/
|
|
uint8_t rks; /* key scale offset (rks) for eg speed */
|
|
uint8_t eg_rate_h; /* eg speed rate high 4bits */
|
|
uint8_t eg_rate_l; /* eg speed rate low 2bits */
|
|
uint32_t eg_shift; /* shift for eg global counter, controls envelope speed */
|
|
uint32_t eg_out; /* eg output */
|
|
|
|
uint32_t update_requests; /* flags to debounce update */
|
|
|
|
#if OPLL_DEBUG
|
|
uint8_t last_eg_state;
|
|
#endif
|
|
} OPLL_SLOT;
|
|
|
|
/* mask */
|
|
#define OPLL_MASK_CH(x) (1 << (x))
|
|
#define OPLL_MASK_HH (1 << (9))
|
|
#define OPLL_MASK_CYM (1 << (10))
|
|
#define OPLL_MASK_TOM (1 << (11))
|
|
#define OPLL_MASK_SD (1 << (12))
|
|
#define OPLL_MASK_BD (1 << (13))
|
|
#define OPLL_MASK_RHYTHM (OPLL_MASK_HH | OPLL_MASK_CYM | OPLL_MASK_TOM | OPLL_MASK_SD | OPLL_MASK_BD)
|
|
|
|
/* rate conveter */
|
|
typedef struct __OPLL_RateConv {
|
|
int ch;
|
|
double timer;
|
|
double f_ratio;
|
|
int16_t *sinc_table;
|
|
int16_t **buf;
|
|
} OPLL_RateConv;
|
|
|
|
OPLL_RateConv *OPLL_RateConv_new(double f_inp, double f_out, int ch);
|
|
void OPLL_RateConv_reset(OPLL_RateConv *conv);
|
|
void OPLL_RateConv_putData(OPLL_RateConv *conv, int ch, int16_t data);
|
|
int16_t OPLL_RateConv_getData(OPLL_RateConv *conv, int ch);
|
|
void OPLL_RateConv_delete(OPLL_RateConv *conv);
|
|
|
|
typedef struct __OPLL {
|
|
uint32_t clk;
|
|
uint32_t rate;
|
|
|
|
uint8_t chip_type;
|
|
|
|
uint32_t adr;
|
|
|
|
double inp_step;
|
|
double out_step;
|
|
double out_time;
|
|
|
|
uint8_t reg[64];
|
|
uint8_t test_flag;
|
|
uint32_t slot_key_status;
|
|
uint8_t rhythm_mode;
|
|
|
|
uint32_t eg_counter;
|
|
|
|
uint32_t pm_phase;
|
|
int32_t am_phase;
|
|
|
|
uint8_t lfo_am;
|
|
|
|
uint32_t noise;
|
|
uint8_t short_noise;
|
|
|
|
int32_t patch_number[9];
|
|
OPLL_SLOT slot[18];
|
|
OPLL_PATCH patch[19 * 2];
|
|
|
|
uint8_t pan[16];
|
|
float pan_fine[16][2];
|
|
|
|
uint32_t mask;
|
|
|
|
/* channel output */
|
|
/* 0..8:tone 9:bd 10:hh 11:sd 12:tom 13:cym */
|
|
int16_t ch_out[14];
|
|
|
|
int16_t mix_out[2];
|
|
|
|
OPLL_RateConv *conv;
|
|
} OPLL;
|
|
|
|
OPLL *OPLL_new(uint32_t clk, uint32_t rate);
|
|
void OPLL_delete(OPLL *);
|
|
|
|
void OPLL_reset(OPLL *);
|
|
void OPLL_resetPatch(OPLL *, uint8_t);
|
|
|
|
/**
|
|
* Set output wave sampling rate.
|
|
* @param rate sampling rate. If clock / 72 (typically 49716 or 49715 at 3.58MHz) is set, the internal rate converter is
|
|
* disabled.
|
|
*/
|
|
void OPLL_setRate(OPLL *opll, uint32_t rate);
|
|
|
|
/**
|
|
* Set internal calcuration quality. Currently no effects, just for compatibility.
|
|
* >= v1.0.0 always synthesizes internal output at clock/72 Hz.
|
|
*/
|
|
void OPLL_setQuality(OPLL *opll, uint8_t q);
|
|
|
|
/**
|
|
* Set pan pot (extra function - not YM2413 chip feature)
|
|
* @param ch 0..8:tone 9:bd 10:hh 11:sd 12:tom 13:cym 14,15:reserved
|
|
* @param pan 0:mute 1:right 2:left 3:center
|
|
* ```
|
|
* pan: 76543210
|
|
* |+- bit 1: enable Left output
|
|
* +-- bit 0: enable Right output
|
|
* ```
|
|
*/
|
|
void OPLL_setPan(OPLL *opll, uint32_t ch, uint8_t pan);
|
|
|
|
/**
|
|
* Set fine-grained panning
|
|
* @param ch 0..8:tone 9:bd 10:hh 11:sd 12:tom 13:cym 14,15:reserved
|
|
* @param pan output strength of left/right channel.
|
|
* pan[0]: left, pan[1]: right. pan[0]=pan[1]=1.0f for center.
|
|
*/
|
|
void OPLL_setPanFine(OPLL *opll, uint32_t ch, float pan[2]);
|
|
|
|
/**
|
|
* Set chip type. If vrc7 is selected, r#14 is ignored.
|
|
* This method not change the current ROM patch set.
|
|
* To change ROM patch set, use OPLL_resetPatch.
|
|
* @param type 0:YM2413 1:VRC7
|
|
*/
|
|
void OPLL_setChipType(OPLL *opll, uint8_t type);
|
|
|
|
void OPLL_writeIO(OPLL *opll, uint32_t reg, uint8_t val);
|
|
void OPLL_writeReg(OPLL *opll, uint32_t reg, uint8_t val);
|
|
|
|
/**
|
|
* Calculate one sample
|
|
*/
|
|
int16_t OPLL_calc(OPLL *opll);
|
|
|
|
/**
|
|
* Calulate stereo sample
|
|
*/
|
|
void OPLL_calcStereo(OPLL *opll, int32_t out[2]);
|
|
|
|
void OPLL_setPatch(OPLL *, const uint8_t *dump);
|
|
void OPLL_copyPatch(OPLL *, int32_t, OPLL_PATCH *);
|
|
|
|
/**
|
|
* Force to refresh.
|
|
* External program should call this function after updating patch parameters.
|
|
*/
|
|
void OPLL_forceRefresh(OPLL *);
|
|
|
|
void OPLL_dumpToPatch(const uint8_t *dump, OPLL_PATCH *patch);
|
|
void OPLL_patchToDump(const OPLL_PATCH *patch, uint8_t *dump);
|
|
void OPLL_getDefaultPatch(int32_t type, int32_t num, OPLL_PATCH *);
|
|
|
|
/**
|
|
* Set channel mask
|
|
* @param mask mask flag: OPLL_MASK_* can be used.
|
|
* - bit 0..8: mask for ch 1 to 9 (OPLL_MASK_CH(i))
|
|
* - bit 9: mask for Hi-Hat (OPLL_MASK_HH)
|
|
* - bit 10: mask for Top-Cym (OPLL_MASK_CYM)
|
|
* - bit 11: mask for Tom (OPLL_MASK_TOM)
|
|
* - bit 12: mask for Snare Drum (OPLL_MASK_SD)
|
|
* - bit 13: mask for Bass Drum (OPLL_MASK_BD)
|
|
*/
|
|
uint32_t OPLL_setMask(OPLL *, uint32_t mask);
|
|
|
|
/**
|
|
* Toggler channel mask flag
|
|
*/
|
|
uint32_t OPLL_toggleMask(OPLL *, uint32_t mask);
|
|
|
|
/* for compatibility */
|
|
#define OPLL_set_rate OPLL_setRate
|
|
#define OPLL_set_quality OPLL_setQuality
|
|
#define OPLL_set_pan OPLL_setPan
|
|
#define OPLL_set_pan_fine OPLL_setPanFine
|
|
#define OPLL_calc_stereo OPLL_calcStereo
|
|
#define OPLL_reset_patch OPLL_resetPatch
|
|
#define OPLL_dump2patch OPLL_dumpToPatch
|
|
#define OPLL_patch2dump OPLL_patchToDump
|
|
#define OPLL_setChipMode OPLL_setChipType
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|