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#ifndef __FMOPL_H_
#define __FMOPL_H_
/* --- system optimize --- */
/* select bit size of output : 8 or 16 */
#define OPL_OUTPUT_BIT 16
typedef unsigned char UINT8; /* unsigned 8bit */
typedef unsigned myint UINT16; /* unsigned 16bit */
typedef unsigned myint UINT32; /* unsigned 32bit */
typedef signed char INT8; /* signed 8bit */
typedef signed myint INT16; /* signed 16bit */
typedef signed myint INT32; /* signed 32bit */
#if (OPL_OUTPUT_BIT==16)
typedef INT16 OPLSAMPLE;
#endif
#if (OPL_OUTPUT_BIT==8)
typedef unsigned char OPLSAMPLE;
#endif
/* ---------- OPL one of slot ---------- */
typedef struct fm_opl_slot {
INT32 TL; /* total level :TL << 8 */
INT32 TLL; /* adjusted now TL */
UINT8 KSR; /* key scale rate :(shift down bit) */
INT32 *AR; /* attack rate :&AR_TABLE[AR<<2] */
INT32 *DR; /* decay rate :&DR_TALBE[DR<<2] */
INT32 SL; /* sustin level :SL_TALBE[SL] */
INT32 *RR; /* release rate :&DR_TABLE[RR<<2] */
UINT8 ksl; /* keyscale level :(shift down bits) */
UINT8 ksr; /* key scale rate :kcode>>KSR */
UINT32 mul; /* multiple :ML_TABLE[ML] */
UINT32 Cnt; /* frequency count : */
UINT32 Incr; /* frequency step : */
/* envelope generator state */
UINT8 eg_typ; /* envelope type flag */
UINT8 evm; /* envelope phase */
INT32 evc; /* envelope counter */
INT32 eve; /* envelope counter end point */
INT32 evs; /* envelope counter step */
INT32 evsa; /* envelope step for AR :AR[ksr] */
INT32 evsd; /* envelope step for DR :DR[ksr] */
INT32 evsr; /* envelope step for RR :RR[ksr] */
/* LFO */
UINT8 ams; /* ams flag */
UINT8 vib; /* vibrate flag */
/* wave selector */
INT32 **wavetable;
}OPL_SLOT;
/* ---------- OPL one of channel ---------- */
typedef struct fm_opl_channel {
OPL_SLOT SLOT[2];
UINT8 CON; /* connection type */
UINT8 FB; /* feed back :(shift down bit) */
INT32 *connect1; /* slot1 output pointer */
INT32 *connect2; /* slot2 output pointer */
INT32 op1_out[2]; /* slot1 output for selfeedback */
/* phase generator state */
UINT32 block_fnum; /* block+fnum : */
UINT8 kcode; /* key code : KeyScaleCode */
UINT32 fc; /* Freq. Increment base */
UINT32 ksl_base; /* KeyScaleLevel Base step */
UINT8 keyon; /* key on/off flag */
} OPL_CH;
/* OPL state */
typedef struct fm_opl_f {
UINT8 type; /* chip type */
myint clock; /* master clock (Hz) */
myint rate; /* sampling rate (Hz) */
double freqbase; /* frequency base */
UINT8 address; /* address register */
UINT32 mode; /* Reg.08 : CSM , notesel,etc. */
/* FM channel slots */
OPL_CH *P_CH; /* pointer of CH */
myint max_ch; /* maximum channel */
/* Rythm sention */
UINT8 rythm; /* Rythm mode , key flag */
INT32 AR_TABLE[75]; /* attack rate tables */
INT32 DR_TABLE[75]; /* decay rate tables */
UINT32 FN_TABLE[1024]; /* fnumber -> increment counter */
/* LFO */
INT32 *ams_table;
INT32 *vib_table;
INT32 amsCnt;
INT32 amsIncr;
INT32 vibCnt;
INT32 vibIncr;
/* wave selector enable flag */
UINT8 wavesel;
} FM_OPL;
/* ---------- Generic interface section ---------- */
#define OPL_TYPE_YM3812 0
FM_OPL *OPLCreate(myint type, myint clock, myint rate);
void OPLDestroy(FM_OPL *OPL);
void OPLResetChip(FM_OPL *OPL);
void OPLWrite(FM_OPL *OPL,myint a,myint v);
unsigned char OPLRead(FM_OPL *OPL,myint a);
void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, myint length);
#endif