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 /* compiler dependence */ 11 #ifndef OSD_CPU_H 12 #define OSD_CPU_H 13 typedef signed short INT16; /* signed 16bit */ 14 typedef signed int INT32; /* signed 32bit */ 15 #endif 16 17 #if (OPL_OUTPUT_BIT==16) 18 typedef INT16 OPLSAMPLE; 19 #endif 20 #if (OPL_OUTPUT_BIT==8) 21 typedef unsigned char OPLSAMPLE; 22 #endif 23 24 typedef void (*OPL_TIMERHANDLER)(int channel,double interval_Sec); 25 typedef void (*OPL_IRQHANDLER)(int param,int irq); 26 typedef void (*OPL_UPDATEHANDLER)(int param,int min_interval_us); 27 typedef void (*OPL_PORTHANDLER_W)(int param,unsigned char data); 28 typedef unsigned char (*OPL_PORTHANDLER_R)(int param); 29 30 /* !!!!! here is private section , do not access there member direct !!!!! */ 31 32 #define OPL_TYPE_WAVESEL 0x01 /* waveform select */ 33 #define OPL_TYPE_ADPCM 0x02 /* DELTA-T ADPCM unit */ 34 #define OPL_TYPE_KEYBOARD 0x04 /* keyboard interface */ 35 #define OPL_TYPE_IO 0x08 /* I/O port */ 36 37 /* Saving is necessary for member of the 'R' mark for suspend/resume */ 38 /* ---------- OPL one of slot ---------- */ 39 typedef struct fm_opl_slot { 40 INT32 TL; /* total level :TL << 8 */ 41 INT32 TLL; /* adjusted now TL */ 42 uint8_t KSR; /* key scale rate :(shift down bit) */ 43 INT32 *AR; /* attack rate :&AR_TABLE[AR<<2] */ 44 INT32 *DR; /* decay rate :&DR_TALBE[DR<<2] */ 45 INT32 SL; /* sustin level :SL_TALBE[SL] */ 46 INT32 *RR; /* release rate :&DR_TABLE[RR<<2] */ 47 uint8_t ksl; /* keyscale level :(shift down bits) */ 48 uint8_t ksr; /* key scale rate :kcode>>KSR */ 49 uint32_t mul; /* multiple :ML_TABLE[ML] */ 50 uint32_t Cnt; /* frequency count : */ 51 uint32_t Incr; /* frequency step : */ 52 /* envelope generator state */ 53 uint8_t eg_typ; /* envelope type flag */ 54 uint8_t evm; /* envelope phase */ 55 INT32 evc; /* envelope counter */ 56 INT32 eve; /* envelope counter end point */ 57 INT32 evs; /* envelope counter step */ 58 INT32 evsa; /* envelope step for AR :AR[ksr] */ 59 INT32 evsd; /* envelope step for DR :DR[ksr] */ 60 INT32 evsr; /* envelope step for RR :RR[ksr] */ 61 /* LFO */ 62 uint8_t ams; /* ams flag */ 63 uint8_t vib; /* vibrate flag */ 64 /* wave selector */ 65 INT32 **wavetable; 66 }OPL_SLOT; 67 68 /* ---------- OPL one of channel ---------- */ 69 typedef struct fm_opl_channel { 70 OPL_SLOT SLOT[2]; 71 uint8_t CON; /* connection type */ 72 uint8_t FB; /* feed back :(shift down bit) */ 73 INT32 *connect1; /* slot1 output pointer */ 74 INT32 *connect2; /* slot2 output pointer */ 75 INT32 op1_out[2]; /* slot1 output for selfeedback */ 76 /* phase generator state */ 77 uint32_t block_fnum; /* block+fnum : */ 78 uint8_t kcode; /* key code : KeyScaleCode */ 79 uint32_t fc; /* Freq. Increment base */ 80 uint32_t ksl_base; /* KeyScaleLevel Base step */ 81 uint8_t keyon; /* key on/off flag */ 82 } OPL_CH; 83 84 /* OPL state */ 85 typedef struct fm_opl_f { 86 uint8_t type; /* chip type */ 87 int clock; /* master clock (Hz) */ 88 int rate; /* sampling rate (Hz) */ 89 double freqbase; /* frequency base */ 90 double TimerBase; /* Timer base time (==sampling time) */ 91 uint8_t address; /* address register */ 92 uint8_t status; /* status flag */ 93 uint8_t statusmask; /* status mask */ 94 uint32_t mode; /* Reg.08 : CSM , notesel,etc. */ 95 /* Timer */ 96 int T[2]; /* timer counter */ 97 uint8_t st[2]; /* timer enable */ 98 /* FM channel slots */ 99 OPL_CH *P_CH; /* pointer of CH */ 100 int max_ch; /* maximum channel */ 101 /* Rhythm sention */ 102 uint8_t rhythm; /* Rhythm mode , key flag */ 103 OPL_PORTHANDLER_R porthandler_r; 104 OPL_PORTHANDLER_W porthandler_w; 105 int port_param; 106 OPL_PORTHANDLER_R keyboardhandler_r; 107 OPL_PORTHANDLER_W keyboardhandler_w; 108 int keyboard_param; 109 /* time tables */ 110 INT32 AR_TABLE[75]; /* atttack rate tables */ 111 INT32 DR_TABLE[75]; /* decay rate tables */ 112 uint32_t FN_TABLE[1024]; /* fnumber -> increment counter */ 113 /* LFO */ 114 INT32 *ams_table; 115 INT32 *vib_table; 116 INT32 amsCnt; 117 INT32 amsIncr; 118 INT32 vibCnt; 119 INT32 vibIncr; 120 /* wave selector enable flag */ 121 uint8_t wavesel; 122 /* external event callback handler */ 123 OPL_TIMERHANDLER TimerHandler; /* TIMER handler */ 124 int TimerParam; /* TIMER parameter */ 125 OPL_IRQHANDLER IRQHandler; /* IRQ handler */ 126 int IRQParam; /* IRQ parameter */ 127 OPL_UPDATEHANDLER UpdateHandler; /* stream update handler */ 128 int UpdateParam; /* stream update parameter */ 129 } FM_OPL; 130 131 /* ---------- Generic interface section ---------- */ 132 #define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL) 133 134 FM_OPL *OPLCreate(int type, int clock, int rate); 135 void OPLDestroy(FM_OPL *OPL); 136 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset); 137 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param); 138 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param); 139 140 void OPLResetChip(FM_OPL *OPL); 141 int OPLWrite(FM_OPL *OPL,int a,int v); 142 unsigned char OPLRead(FM_OPL *OPL,int a); 143 int OPLTimerOver(FM_OPL *OPL,int c); 144 145 void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length); 146 #endif 147