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 int INT32; /* signed 32bit */ 14 #endif 15 16 #if (OPL_OUTPUT_BIT==16) 17 typedef int16_t OPLSAMPLE; 18 #endif 19 #if (OPL_OUTPUT_BIT==8) 20 typedef unsigned char OPLSAMPLE; 21 #endif 22 23 typedef void (*OPL_TIMERHANDLER)(int channel,double interval_Sec); 24 typedef void (*OPL_IRQHANDLER)(int param,int irq); 25 typedef void (*OPL_UPDATEHANDLER)(int param,int min_interval_us); 26 typedef void (*OPL_PORTHANDLER_W)(int param,unsigned char data); 27 typedef unsigned char (*OPL_PORTHANDLER_R)(int param); 28 29 /* !!!!! here is private section , do not access there member direct !!!!! */ 30 31 #define OPL_TYPE_WAVESEL 0x01 /* waveform select */ 32 #define OPL_TYPE_ADPCM 0x02 /* DELTA-T ADPCM unit */ 33 #define OPL_TYPE_KEYBOARD 0x04 /* keyboard interface */ 34 #define OPL_TYPE_IO 0x08 /* I/O port */ 35 36 /* Saving is necessary for member of the 'R' mark for suspend/resume */ 37 /* ---------- OPL one of slot ---------- */ 38 typedef struct fm_opl_slot { 39 INT32 TL; /* total level :TL << 8 */ 40 INT32 TLL; /* adjusted now TL */ 41 uint8_t KSR; /* key scale rate :(shift down bit) */ 42 INT32 *AR; /* attack rate :&AR_TABLE[AR<<2] */ 43 INT32 *DR; /* decay rate :&DR_TALBE[DR<<2] */ 44 INT32 SL; /* sustin level :SL_TALBE[SL] */ 45 INT32 *RR; /* release rate :&DR_TABLE[RR<<2] */ 46 uint8_t ksl; /* keyscale level :(shift down bits) */ 47 uint8_t ksr; /* key scale rate :kcode>>KSR */ 48 uint32_t mul; /* multiple :ML_TABLE[ML] */ 49 uint32_t Cnt; /* frequency count : */ 50 uint32_t Incr; /* frequency step : */ 51 /* envelope generator state */ 52 uint8_t eg_typ; /* envelope type flag */ 53 uint8_t evm; /* envelope phase */ 54 INT32 evc; /* envelope counter */ 55 INT32 eve; /* envelope counter end point */ 56 INT32 evs; /* envelope counter step */ 57 INT32 evsa; /* envelope step for AR :AR[ksr] */ 58 INT32 evsd; /* envelope step for DR :DR[ksr] */ 59 INT32 evsr; /* envelope step for RR :RR[ksr] */ 60 /* LFO */ 61 uint8_t ams; /* ams flag */ 62 uint8_t vib; /* vibrate flag */ 63 /* wave selector */ 64 INT32 **wavetable; 65 }OPL_SLOT; 66 67 /* ---------- OPL one of channel ---------- */ 68 typedef struct fm_opl_channel { 69 OPL_SLOT SLOT[2]; 70 uint8_t CON; /* connection type */ 71 uint8_t FB; /* feed back :(shift down bit) */ 72 INT32 *connect1; /* slot1 output pointer */ 73 INT32 *connect2; /* slot2 output pointer */ 74 INT32 op1_out[2]; /* slot1 output for selfeedback */ 75 /* phase generator state */ 76 uint32_t block_fnum; /* block+fnum : */ 77 uint8_t kcode; /* key code : KeyScaleCode */ 78 uint32_t fc; /* Freq. Increment base */ 79 uint32_t ksl_base; /* KeyScaleLevel Base step */ 80 uint8_t keyon; /* key on/off flag */ 81 } OPL_CH; 82 83 /* OPL state */ 84 typedef struct fm_opl_f { 85 uint8_t type; /* chip type */ 86 int clock; /* master clock (Hz) */ 87 int rate; /* sampling rate (Hz) */ 88 double freqbase; /* frequency base */ 89 double TimerBase; /* Timer base time (==sampling time) */ 90 uint8_t address; /* address register */ 91 uint8_t status; /* status flag */ 92 uint8_t statusmask; /* status mask */ 93 uint32_t mode; /* Reg.08 : CSM , notesel,etc. */ 94 /* Timer */ 95 int T[2]; /* timer counter */ 96 uint8_t st[2]; /* timer enable */ 97 /* FM channel slots */ 98 OPL_CH *P_CH; /* pointer of CH */ 99 int max_ch; /* maximum channel */ 100 /* Rhythm sention */ 101 uint8_t rhythm; /* Rhythm mode , key flag */ 102 OPL_PORTHANDLER_R porthandler_r; 103 OPL_PORTHANDLER_W porthandler_w; 104 int port_param; 105 OPL_PORTHANDLER_R keyboardhandler_r; 106 OPL_PORTHANDLER_W keyboardhandler_w; 107 int keyboard_param; 108 /* time tables */ 109 INT32 AR_TABLE[75]; /* atttack rate tables */ 110 INT32 DR_TABLE[75]; /* decay rate tables */ 111 uint32_t FN_TABLE[1024]; /* fnumber -> increment counter */ 112 /* LFO */ 113 INT32 *ams_table; 114 INT32 *vib_table; 115 INT32 amsCnt; 116 INT32 amsIncr; 117 INT32 vibCnt; 118 INT32 vibIncr; 119 /* wave selector enable flag */ 120 uint8_t wavesel; 121 /* external event callback handler */ 122 OPL_TIMERHANDLER TimerHandler; /* TIMER handler */ 123 int TimerParam; /* TIMER parameter */ 124 OPL_IRQHANDLER IRQHandler; /* IRQ handler */ 125 int IRQParam; /* IRQ parameter */ 126 OPL_UPDATEHANDLER UpdateHandler; /* stream update handler */ 127 int UpdateParam; /* stream update parameter */ 128 } FM_OPL; 129 130 /* ---------- Generic interface section ---------- */ 131 #define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL) 132 133 FM_OPL *OPLCreate(int type, int clock, int rate); 134 void OPLDestroy(FM_OPL *OPL); 135 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset); 136 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param); 137 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param); 138 139 void OPLResetChip(FM_OPL *OPL); 140 int OPLWrite(FM_OPL *OPL,int a,int v); 141 unsigned char OPLRead(FM_OPL *OPL,int a); 142 int OPLTimerOver(FM_OPL *OPL,int c); 143 144 void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length); 145 #endif 146