| #ifndef FMOPL_H |
| #define FMOPL_H |
| |
| #include <stdint.h> |
| |
| typedef void (*OPL_TIMERHANDLER)(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[75]; /* atttack rate tables */ |
| int32_t DR_TABLE[75]; /* 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 */ |
| int 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,int channelOffset); |
| |
| 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 |
