1 #ifndef FMOPL_H 2 #define FMOPL_H 3 4 /* --- system optimize --- */ 5 /* select bit size of output : 8 or 16 */ 6 #define OPL_OUTPUT_BIT 16 7 8 /* compiler dependence */ 9 #ifndef OSD_CPU_H 10 #define OSD_CPU_H 11 typedef unsigned char UINT8; /* unsigned 8bit */ 12 typedef unsigned short UINT16; /* unsigned 16bit */ 13 typedef unsigned int UINT32; /* unsigned 32bit */ 14 typedef signed char INT8; /* signed 8bit */ 15 typedef signed short INT16; /* signed 16bit */ 16 typedef signed int INT32; /* signed 32bit */ 17 #endif 18 19 #if (OPL_OUTPUT_BIT==16) 20 typedef INT16 OPLSAMPLE; 21 #endif 22 #if (OPL_OUTPUT_BIT==8) 23 typedef unsigned char OPLSAMPLE; 24 #endif 25 26 typedef void (*OPL_TIMERHANDLER)(int channel,double interval_Sec); 27 typedef void (*OPL_IRQHANDLER)(int param,int irq); 28 typedef void (*OPL_UPDATEHANDLER)(int param,int min_interval_us); 29 typedef void (*OPL_PORTHANDLER_W)(int param,unsigned char data); 30 typedef unsigned char (*OPL_PORTHANDLER_R)(int param); 31 32 /* !!!!! here is private section , do not access there member direct !!!!! */ 33 34 #define OPL_TYPE_WAVESEL 0x01 /* waveform select */ 35 #define OPL_TYPE_ADPCM 0x02 /* DELTA-T ADPCM unit */ 36 #define OPL_TYPE_KEYBOARD 0x04 /* keyboard interface */ 37 #define OPL_TYPE_IO 0x08 /* I/O port */ 38 39 /* Saving is necessary for member of the 'R' mark for suspend/resume */ 40 /* ---------- OPL one of slot ---------- */ 41 typedef struct fm_opl_slot { 42 INT32 TL; /* total level :TL << 8 */ 43 INT32 TLL; /* adjusted now TL */ 44 UINT8 KSR; /* key scale rate :(shift down bit) */ 45 INT32 *AR; /* attack rate :&AR_TABLE[AR<<2] */ 46 INT32 *DR; /* decay rate :&DR_TALBE[DR<<2] */ 47 INT32 SL; /* sustin level :SL_TALBE[SL] */ 48 INT32 *RR; /* release rate :&DR_TABLE[RR<<2] */ 49 UINT8 ksl; /* keyscale level :(shift down bits) */ 50 UINT8 ksr; /* key scale rate :kcode>>KSR */ 51 UINT32 mul; /* multiple :ML_TABLE[ML] */ 52 UINT32 Cnt; /* frequency count : */ 53 UINT32 Incr; /* frequency step : */ 54 /* envelope generator state */ 55 UINT8 eg_typ; /* envelope type flag */ 56 UINT8 evm; /* envelope phase */ 57 INT32 evc; /* envelope counter */ 58 INT32 eve; /* envelope counter end point */ 59 INT32 evs; /* envelope counter step */ 60 INT32 evsa; /* envelope step for AR :AR[ksr] */ 61 INT32 evsd; /* envelope step for DR :DR[ksr] */ 62 INT32 evsr; /* envelope step for RR :RR[ksr] */ 63 /* LFO */ 64 UINT8 ams; /* ams flag */ 65 UINT8 vib; /* vibrate flag */ 66 /* wave selector */ 67 INT32 **wavetable; 68 }OPL_SLOT; 69 70 /* ---------- OPL one of channel ---------- */ 71 typedef struct fm_opl_channel { 72 OPL_SLOT SLOT[2]; 73 UINT8 CON; /* connection type */ 74 UINT8 FB; /* feed back :(shift down bit) */ 75 INT32 *connect1; /* slot1 output pointer */ 76 INT32 *connect2; /* slot2 output pointer */ 77 INT32 op1_out[2]; /* slot1 output for selfeedback */ 78 /* phase generator state */ 79 UINT32 block_fnum; /* block+fnum : */ 80 UINT8 kcode; /* key code : KeyScaleCode */ 81 UINT32 fc; /* Freq. Increment base */ 82 UINT32 ksl_base; /* KeyScaleLevel Base step */ 83 UINT8 keyon; /* key on/off flag */ 84 } OPL_CH; 85 86 /* OPL state */ 87 typedef struct fm_opl_f { 88 UINT8 type; /* chip type */ 89 int clock; /* master clock (Hz) */ 90 int rate; /* sampling rate (Hz) */ 91 double freqbase; /* frequency base */ 92 double TimerBase; /* Timer base time (==sampling time) */ 93 UINT8 address; /* address register */ 94 UINT8 status; /* status flag */ 95 UINT8 statusmask; /* status mask */ 96 UINT32 mode; /* Reg.08 : CSM , notesel,etc. */ 97 /* Timer */ 98 int T[2]; /* timer counter */ 99 UINT8 st[2]; /* timer enable */ 100 /* FM channel slots */ 101 OPL_CH *P_CH; /* pointer of CH */ 102 int max_ch; /* maximum channel */ 103 /* Rhythm sention */ 104 UINT8 rhythm; /* Rhythm mode , key flag */ 105 OPL_PORTHANDLER_R porthandler_r; 106 OPL_PORTHANDLER_W porthandler_w; 107 int port_param; 108 OPL_PORTHANDLER_R keyboardhandler_r; 109 OPL_PORTHANDLER_W keyboardhandler_w; 110 int keyboard_param; 111 /* time tables */ 112 INT32 AR_TABLE[75]; /* atttack rate tables */ 113 INT32 DR_TABLE[75]; /* decay rate tables */ 114 UINT32 FN_TABLE[1024]; /* fnumber -> increment counter */ 115 /* LFO */ 116 INT32 *ams_table; 117 INT32 *vib_table; 118 INT32 amsCnt; 119 INT32 amsIncr; 120 INT32 vibCnt; 121 INT32 vibIncr; 122 /* wave selector enable flag */ 123 UINT8 wavesel; 124 /* external event callback handler */ 125 OPL_TIMERHANDLER TimerHandler; /* TIMER handler */ 126 int TimerParam; /* TIMER parameter */ 127 OPL_IRQHANDLER IRQHandler; /* IRQ handler */ 128 int IRQParam; /* IRQ parameter */ 129 OPL_UPDATEHANDLER UpdateHandler; /* stream update handler */ 130 int UpdateParam; /* stream update parameter */ 131 } FM_OPL; 132 133 /* ---------- Generic interface section ---------- */ 134 #define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL) 135 136 FM_OPL *OPLCreate(int type, int clock, int rate); 137 void OPLDestroy(FM_OPL *OPL); 138 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset); 139 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param); 140 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param); 141 142 void OPLResetChip(FM_OPL *OPL); 143 int OPLWrite(FM_OPL *OPL,int a,int v); 144 unsigned char OPLRead(FM_OPL *OPL,int a); 145 int OPLTimerOver(FM_OPL *OPL,int c); 146 147 void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length); 148 #endif 149