1#ifndef FMOPL_H 2#define FMOPL_H 3 4 5typedef void (*OPL_TIMERHANDLER)(void *param, int channel, double interval_Sec); 6 7/* !!!!! here is private section , do not access there member direct !!!!! */ 8 9/* Saving is necessary for member of the 'R' mark for suspend/resume */ 10/* ---------- OPL one of slot ---------- */ 11typedef struct fm_opl_slot { 12 int32_t TL; /* total level :TL << 8 */ 13 int32_t TLL; /* adjusted now TL */ 14 uint8_t KSR; /* key scale rate :(shift down bit) */ 15 int32_t *AR; /* attack rate :&AR_TABLE[AR<<2] */ 16 int32_t *DR; /* decay rate :&DR_TALBE[DR<<2] */ 17 int32_t SL; /* sustin level :SL_TALBE[SL] */ 18 int32_t *RR; /* release rate :&DR_TABLE[RR<<2] */ 19 uint8_t ksl; /* keyscale level :(shift down bits) */ 20 uint8_t ksr; /* key scale rate :kcode>>KSR */ 21 uint32_t mul; /* multiple :ML_TABLE[ML] */ 22 uint32_t Cnt; /* frequency count : */ 23 uint32_t Incr; /* frequency step : */ 24 /* envelope generator state */ 25 uint8_t eg_typ; /* envelope type flag */ 26 uint8_t evm; /* envelope phase */ 27 int32_t evc; /* envelope counter */ 28 int32_t eve; /* envelope counter end point */ 29 int32_t evs; /* envelope counter step */ 30 int32_t evsa; /* envelope step for AR :AR[ksr] */ 31 int32_t evsd; /* envelope step for DR :DR[ksr] */ 32 int32_t evsr; /* envelope step for RR :RR[ksr] */ 33 /* LFO */ 34 uint8_t ams; /* ams flag */ 35 uint8_t vib; /* vibrate flag */ 36 /* wave selector */ 37 int32_t **wavetable; 38}OPL_SLOT; 39 40/* ---------- OPL one of channel ---------- */ 41typedef struct fm_opl_channel { 42 OPL_SLOT SLOT[2]; 43 uint8_t CON; /* connection type */ 44 uint8_t FB; /* feed back :(shift down bit) */ 45 int32_t *connect1; /* slot1 output pointer */ 46 int32_t *connect2; /* slot2 output pointer */ 47 int32_t op1_out[2]; /* slot1 output for selfeedback */ 48 /* phase generator state */ 49 uint32_t block_fnum; /* block+fnum : */ 50 uint8_t kcode; /* key code : KeyScaleCode */ 51 uint32_t fc; /* Freq. Increment base */ 52 uint32_t ksl_base; /* KeyScaleLevel Base step */ 53 uint8_t keyon; /* key on/off flag */ 54} OPL_CH; 55 56/* OPL state */ 57typedef struct fm_opl_f { 58 int clock; /* master clock (Hz) */ 59 int rate; /* sampling rate (Hz) */ 60 double freqbase; /* frequency base */ 61 double TimerBase; /* Timer base time (==sampling time) */ 62 uint8_t address; /* address register */ 63 uint8_t status; /* status flag */ 64 uint8_t statusmask; /* status mask */ 65 uint32_t mode; /* Reg.08 : CSM , notesel,etc. */ 66 /* Timer */ 67 int T[2]; /* timer counter */ 68 uint8_t st[2]; /* timer enable */ 69 /* FM channel slots */ 70 OPL_CH *P_CH; /* pointer of CH */ 71 int max_ch; /* maximum channel */ 72 /* Rhythm sention */ 73 uint8_t rhythm; /* Rhythm mode , key flag */ 74 /* time tables */ 75 int32_t AR_TABLE[76]; /* attack rate tables */ 76 int32_t DR_TABLE[76]; /* decay rate tables */ 77 uint32_t FN_TABLE[1024]; /* fnumber -> increment counter */ 78 /* LFO */ 79 int32_t *ams_table; 80 int32_t *vib_table; 81 int32_t amsCnt; 82 int32_t amsIncr; 83 int32_t vibCnt; 84 int32_t vibIncr; 85 /* wave selector enable flag */ 86 uint8_t wavesel; 87 /* external event callback handler */ 88 OPL_TIMERHANDLER TimerHandler; /* TIMER handler */ 89 void *TimerParam; /* TIMER parameter */ 90} FM_OPL; 91 92/* ---------- Generic interface section ---------- */ 93FM_OPL *OPLCreate(int clock, int rate); 94void OPLDestroy(FM_OPL *OPL); 95void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler, 96 void *param); 97 98int OPLWrite(FM_OPL *OPL,int a,int v); 99unsigned char OPLRead(FM_OPL *OPL,int a); 100int OPLTimerOver(FM_OPL *OPL,int c); 101 102void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length); 103#endif 104