diff options
Diffstat (limited to 'hw/audio/fmopl.h')
| -rw-r--r-- | hw/audio/fmopl.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/hw/audio/fmopl.h b/hw/audio/fmopl.h new file mode 100644 index 000000000..e008e72d7 --- /dev/null +++ b/hw/audio/fmopl.h @@ -0,0 +1,103 @@ +#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 |