1 #ifndef FMOPL_H 2 #define FMOPL_H 3 4 #include <stdint.h> 5 6 /* --- system optimize --- */ 7 /* select bit size of output : 8 or 16 */ 8 #define OPL_OUTPUT_BIT 16 9 10 #if (OPL_OUTPUT_BIT==16) 11 typedef int16_t OPLSAMPLE; 12 #endif 13 #if (OPL_OUTPUT_BIT==8) 14 typedef unsigned char OPLSAMPLE; 15 #endif 16 17 typedef void (*OPL_TIMERHANDLER)(int channel,double interval_Sec); 18 typedef void (*OPL_IRQHANDLER)(int param,int irq); 19 typedef void (*OPL_UPDATEHANDLER)(int param,int min_interval_us); 20 typedef void (*OPL_PORTHANDLER_W)(int param,unsigned char data); 21 typedef unsigned char (*OPL_PORTHANDLER_R)(int param); 22 23 /* !!!!! here is private section , do not access there member direct !!!!! */ 24 25 #define OPL_TYPE_WAVESEL 0x01 /* waveform select */ 26 #define OPL_TYPE_ADPCM 0x02 /* DELTA-T ADPCM unit */ 27 #define OPL_TYPE_KEYBOARD 0x04 /* keyboard interface */ 28 #define OPL_TYPE_IO 0x08 /* I/O port */ 29 30 /* Saving is necessary for member of the 'R' mark for suspend/resume */ 31 /* ---------- OPL one of slot ---------- */ 32 typedef struct fm_opl_slot { 33 int32_t TL; /* total level :TL << 8 */ 34 int32_t TLL; /* adjusted now TL */ 35 uint8_t KSR; /* key scale rate :(shift down bit) */ 36 int32_t *AR; /* attack rate :&AR_TABLE[AR<<2] */ 37 int32_t *DR; /* decay rate :&DR_TALBE[DR<<2] */ 38 int32_t SL; /* sustin level :SL_TALBE[SL] */ 39 int32_t *RR; /* release rate :&DR_TABLE[RR<<2] */ 40 uint8_t ksl; /* keyscale level :(shift down bits) */ 41 uint8_t ksr; /* key scale rate :kcode>>KSR */ 42 uint32_t mul; /* multiple :ML_TABLE[ML] */ 43 uint32_t Cnt; /* frequency count : */ 44 uint32_t Incr; /* frequency step : */ 45 /* envelope generator state */ 46 uint8_t eg_typ; /* envelope type flag */ 47 uint8_t evm; /* envelope phase */ 48 int32_t evc; /* envelope counter */ 49 int32_t eve; /* envelope counter end point */ 50 int32_t evs; /* envelope counter step */ 51 int32_t evsa; /* envelope step for AR :AR[ksr] */ 52 int32_t evsd; /* envelope step for DR :DR[ksr] */ 53 int32_t evsr; /* envelope step for RR :RR[ksr] */ 54 /* LFO */ 55 uint8_t ams; /* ams flag */ 56 uint8_t vib; /* vibrate flag */ 57 /* wave selector */ 58 int32_t **wavetable; 59 }OPL_SLOT; 60 61 /* ---------- OPL one of channel ---------- */ 62 typedef struct fm_opl_channel { 63 OPL_SLOT SLOT[2]; 64 uint8_t CON; /* connection type */ 65 uint8_t FB; /* feed back :(shift down bit) */ 66 int32_t *connect1; /* slot1 output pointer */ 67 int32_t *connect2; /* slot2 output pointer */ 68 int32_t op1_out[2]; /* slot1 output for selfeedback */ 69 /* phase generator state */ 70 uint32_t block_fnum; /* block+fnum : */ 71 uint8_t kcode; /* key code : KeyScaleCode */ 72 uint32_t fc; /* Freq. Increment base */ 73 uint32_t ksl_base; /* KeyScaleLevel Base step */ 74 uint8_t keyon; /* key on/off flag */ 75 } OPL_CH; 76 77 /* OPL state */ 78 typedef struct fm_opl_f { 79 uint8_t type; /* chip type */ 80 int clock; /* master clock (Hz) */ 81 int rate; /* sampling rate (Hz) */ 82 double freqbase; /* frequency base */ 83 double TimerBase; /* Timer base time (==sampling time) */ 84 uint8_t address; /* address register */ 85 uint8_t status; /* status flag */ 86 uint8_t statusmask; /* status mask */ 87 uint32_t mode; /* Reg.08 : CSM , notesel,etc. */ 88 /* Timer */ 89 int T[2]; /* timer counter */ 90 uint8_t st[2]; /* timer enable */ 91 /* FM channel slots */ 92 OPL_CH *P_CH; /* pointer of CH */ 93 int max_ch; /* maximum channel */ 94 /* Rhythm sention */ 95 uint8_t rhythm; /* Rhythm mode , key flag */ 96 OPL_PORTHANDLER_R porthandler_r; 97 OPL_PORTHANDLER_W porthandler_w; 98 int port_param; 99 OPL_PORTHANDLER_R keyboardhandler_r; 100 OPL_PORTHANDLER_W keyboardhandler_w; 101 int keyboard_param; 102 /* time tables */ 103 int32_t AR_TABLE[75]; /* atttack rate tables */ 104 int32_t DR_TABLE[75]; /* decay rate tables */ 105 uint32_t FN_TABLE[1024]; /* fnumber -> increment counter */ 106 /* LFO */ 107 int32_t *ams_table; 108 int32_t *vib_table; 109 int32_t amsCnt; 110 int32_t amsIncr; 111 int32_t vibCnt; 112 int32_t vibIncr; 113 /* wave selector enable flag */ 114 uint8_t wavesel; 115 /* external event callback handler */ 116 OPL_TIMERHANDLER TimerHandler; /* TIMER handler */ 117 int TimerParam; /* TIMER parameter */ 118 OPL_IRQHANDLER IRQHandler; /* IRQ handler */ 119 int IRQParam; /* IRQ parameter */ 120 OPL_UPDATEHANDLER UpdateHandler; /* stream update handler */ 121 int UpdateParam; /* stream update parameter */ 122 } FM_OPL; 123 124 /* ---------- Generic interface section ---------- */ 125 #define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL) 126 127 FM_OPL *OPLCreate(int type, int clock, int rate); 128 void OPLDestroy(FM_OPL *OPL); 129 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset); 130 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param); 131 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param); 132 133 void OPLResetChip(FM_OPL *OPL); 134 int OPLWrite(FM_OPL *OPL,int a,int v); 135 unsigned char OPLRead(FM_OPL *OPL,int a); 136 int OPLTimerOver(FM_OPL *OPL,int c); 137 138 void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length); 139 #endif 140