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- #ifndef FMOPL_H
- #define FMOPL_H
- typedef void (*OPL_TIMERHANDLER)(void *param, int channel, double interval_Sec);
- /* !!!!! here is private section , do not access there member direct !!!!! */
- /* Saving is necessary for member of the 'R' mark for suspend/resume */
- /* ---------- OPL one of slot ---------- */
- typedef struct fm_opl_slot {
- int32_t TL; /* total level :TL << 8 */
- int32_t TLL; /* adjusted now TL */
- uint8_t KSR; /* key scale rate :(shift down bit) */
- int32_t *AR; /* attack rate :&AR_TABLE[AR<<2] */
- int32_t *DR; /* decay rate :&DR_TALBE[DR<<2] */
- int32_t SL; /* sustin level :SL_TALBE[SL] */
- int32_t *RR; /* release rate :&DR_TABLE[RR<<2] */
- uint8_t ksl; /* keyscale level :(shift down bits) */
- uint8_t ksr; /* key scale rate :kcode>>KSR */
- uint32_t mul; /* multiple :ML_TABLE[ML] */
- uint32_t Cnt; /* frequency count : */
- uint32_t Incr; /* frequency step : */
- /* envelope generator state */
- uint8_t eg_typ; /* envelope type flag */
- uint8_t evm; /* envelope phase */
- int32_t evc; /* envelope counter */
- int32_t eve; /* envelope counter end point */
- int32_t evs; /* envelope counter step */
- int32_t evsa; /* envelope step for AR :AR[ksr] */
- int32_t evsd; /* envelope step for DR :DR[ksr] */
- int32_t evsr; /* envelope step for RR :RR[ksr] */
- /* LFO */
- uint8_t ams; /* ams flag */
- uint8_t vib; /* vibrate flag */
- /* wave selector */
- int32_t **wavetable;
- }OPL_SLOT;
- /* ---------- OPL one of channel ---------- */
- typedef struct fm_opl_channel {
- OPL_SLOT SLOT[2];
- uint8_t CON; /* connection type */
- uint8_t FB; /* feed back :(shift down bit) */
- int32_t *connect1; /* slot1 output pointer */
- int32_t *connect2; /* slot2 output pointer */
- int32_t op1_out[2]; /* slot1 output for selfeedback */
- /* phase generator state */
- uint32_t block_fnum; /* block+fnum : */
- uint8_t kcode; /* key code : KeyScaleCode */
- uint32_t fc; /* Freq. Increment base */
- uint32_t ksl_base; /* KeyScaleLevel Base step */
- uint8_t keyon; /* key on/off flag */
- } OPL_CH;
- /* OPL state */
- typedef struct fm_opl_f {
- int clock; /* master clock (Hz) */
- int rate; /* sampling rate (Hz) */
- double freqbase; /* frequency base */
- double TimerBase; /* Timer base time (==sampling time) */
- uint8_t address; /* address register */
- uint8_t status; /* status flag */
- uint8_t statusmask; /* status mask */
- uint32_t mode; /* Reg.08 : CSM , notesel,etc. */
- /* Timer */
- int T[2]; /* timer counter */
- uint8_t st[2]; /* timer enable */
- /* FM channel slots */
- OPL_CH *P_CH; /* pointer of CH */
- int max_ch; /* maximum channel */
- /* Rhythm sention */
- uint8_t rhythm; /* Rhythm mode , key flag */
- /* time tables */
- int32_t AR_TABLE[76]; /* attack rate tables */
- int32_t DR_TABLE[76]; /* decay rate tables */
- uint32_t FN_TABLE[1024]; /* fnumber -> increment counter */
- /* LFO */
- int32_t *ams_table;
- int32_t *vib_table;
- int32_t amsCnt;
- int32_t amsIncr;
- int32_t vibCnt;
- int32_t vibIncr;
- /* wave selector enable flag */
- uint8_t wavesel;
- /* external event callback handler */
- OPL_TIMERHANDLER TimerHandler; /* TIMER handler */
- void *TimerParam; /* TIMER parameter */
- } FM_OPL;
- /* ---------- Generic interface section ---------- */
- FM_OPL *OPLCreate(int clock, int rate);
- void OPLDestroy(FM_OPL *OPL);
- void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler,
- void *param);
- int OPLWrite(FM_OPL *OPL,int a,int v);
- unsigned char OPLRead(FM_OPL *OPL,int a);
- int OPLTimerOver(FM_OPL *OPL,int c);
- void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length);
- #endif
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