--- /dev/null
+#ifndef __FMOPL_H_
+#define __FMOPL_H_
+
+/* --- select emulation chips --- */
+#define BUILD_YM3812 (HAS_YM3812)
+//#define BUILD_YM3526 (HAS_YM3526)
+//#define BUILD_Y8950 (HAS_Y8950)
+
+/* --- system optimize --- */
+/* select bit size of output : 8 or 16 */
+#define OPL_OUTPUT_BIT 16
+
+/* compiler dependence */
+#ifndef OSD_CPU_H
+#define OSD_CPU_H
+typedef unsigned char UINT8; /* unsigned 8bit */
+typedef unsigned short UINT16; /* unsigned 16bit */
+typedef unsigned int UINT32; /* unsigned 32bit */
+typedef signed char INT8; /* signed 8bit */
+typedef signed short INT16; /* signed 16bit */
+typedef signed int INT32; /* signed 32bit */
+#endif
+
+#if (OPL_OUTPUT_BIT==16)
+typedef INT16 OPLSAMPLE;
+#endif
+#if (OPL_OUTPUT_BIT==8)
+typedef unsigned char OPLSAMPLE;
+#endif
+
+
+#if BUILD_Y8950
+#include "ymdeltat.h"
+#endif
+
+typedef void (*OPL_TIMERHANDLER)(int channel,double interval_Sec);
+typedef void (*OPL_IRQHANDLER)(int param,int irq);
+typedef void (*OPL_UPDATEHANDLER)(int param,int min_interval_us);
+typedef void (*OPL_PORTHANDLER_W)(int param,unsigned char data);
+typedef unsigned char (*OPL_PORTHANDLER_R)(int param);
+
+/* !!!!! here is private section , do not access there member direct !!!!! */
+
+#define OPL_TYPE_WAVESEL 0x01 /* waveform select */
+#define OPL_TYPE_ADPCM 0x02 /* DELTA-T ADPCM unit */
+#define OPL_TYPE_KEYBOARD 0x04 /* keyboard interface */
+#define OPL_TYPE_IO 0x08 /* I/O port */
+
+/* Saving is necessary for member of the 'R' mark for suspend/resume */
+/* ---------- OPL one of slot ---------- */
+typedef struct fm_opl_slot {
+ INT32 TL; /* total level :TL << 8 */
+ INT32 TLL; /* adjusted now TL */
+ UINT8 KSR; /* key scale rate :(shift down bit) */
+ INT32 *AR; /* attack rate :&AR_TABLE[AR<<2] */
+ INT32 *DR; /* decay rate :&DR_TALBE[DR<<2] */
+ INT32 SL; /* sustin level :SL_TALBE[SL] */
+ INT32 *RR; /* release rate :&DR_TABLE[RR<<2] */
+ UINT8 ksl; /* keyscale level :(shift down bits) */
+ UINT8 ksr; /* key scale rate :kcode>>KSR */
+ UINT32 mul; /* multiple :ML_TABLE[ML] */
+ UINT32 Cnt; /* frequency count : */
+ UINT32 Incr; /* frequency step : */
+ /* envelope generator state */
+ UINT8 eg_typ; /* envelope type flag */
+ UINT8 evm; /* envelope phase */
+ INT32 evc; /* envelope counter */
+ INT32 eve; /* envelope counter end point */
+ INT32 evs; /* envelope counter step */
+ INT32 evsa; /* envelope step for AR :AR[ksr] */
+ INT32 evsd; /* envelope step for DR :DR[ksr] */
+ INT32 evsr; /* envelope step for RR :RR[ksr] */
+ /* LFO */
+ UINT8 ams; /* ams flag */
+ UINT8 vib; /* vibrate flag */
+ /* wave selector */
+ INT32 **wavetable;
+}OPL_SLOT;
+
+/* ---------- OPL one of channel ---------- */
+typedef struct fm_opl_channel {
+ OPL_SLOT SLOT[2];
+ UINT8 CON; /* connection type */
+ UINT8 FB; /* feed back :(shift down bit) */
+ INT32 *connect1; /* slot1 output pointer */
+ INT32 *connect2; /* slot2 output pointer */
+ INT32 op1_out[2]; /* slot1 output for selfeedback */
+ /* phase generator state */
+ UINT32 block_fnum; /* block+fnum : */
+ UINT8 kcode; /* key code : KeyScaleCode */
+ UINT32 fc; /* Freq. Increment base */
+ UINT32 ksl_base; /* KeyScaleLevel Base step */
+ UINT8 keyon; /* key on/off flag */
+} OPL_CH;
+
+/* OPL state */
+typedef struct fm_opl_f {
+ UINT8 type; /* chip type */
+ int clock; /* master clock (Hz) */
+ int rate; /* sampling rate (Hz) */
+ double freqbase; /* frequency base */
+ double TimerBase; /* Timer base time (==sampling time) */
+ UINT8 address; /* address register */
+ UINT8 status; /* status flag */
+ UINT8 statusmask; /* status mask */
+ UINT32 mode; /* Reg.08 : CSM , notesel,etc. */
+ /* Timer */
+ int T[2]; /* timer counter */
+ UINT8 st[2]; /* timer enable */
+ /* FM channel slots */
+ OPL_CH *P_CH; /* pointer of CH */
+ int max_ch; /* maximum channel */
+ /* Rhythm sention */
+ UINT8 rhythm; /* Rhythm mode , key flag */
+#if BUILD_Y8950
+ /* Delta-T ADPCM unit (Y8950) */
+ YM_DELTAT *deltat; /* DELTA-T ADPCM */
+#endif
+ /* Keyboard / I/O interface unit (Y8950) */
+ UINT8 portDirection;
+ UINT8 portLatch;
+ OPL_PORTHANDLER_R porthandler_r;
+ OPL_PORTHANDLER_W porthandler_w;
+ int port_param;
+ OPL_PORTHANDLER_R keyboardhandler_r;
+ OPL_PORTHANDLER_W keyboardhandler_w;
+ int keyboard_param;
+ /* time tables */
+ INT32 AR_TABLE[75]; /* atttack rate tables */
+ INT32 DR_TABLE[75]; /* decay rate tables */
+ UINT32 FN_TABLE[1024]; /* fnumber -> increment counter */
+ /* LFO */
+ INT32 *ams_table;
+ INT32 *vib_table;
+ INT32 amsCnt;
+ INT32 amsIncr;
+ INT32 vibCnt;
+ INT32 vibIncr;
+ /* wave selector enable flag */
+ UINT8 wavesel;
+ /* external event callback handler */
+ OPL_TIMERHANDLER TimerHandler; /* TIMER handler */
+ int TimerParam; /* TIMER parameter */
+ OPL_IRQHANDLER IRQHandler; /* IRQ handler */
+ int IRQParam; /* IRQ parameter */
+ OPL_UPDATEHANDLER UpdateHandler; /* stream update handler */
+ int UpdateParam; /* stream update parameter */
+} FM_OPL;
+
+/* ---------- Generic interface section ---------- */
+#define OPL_TYPE_YM3526 (0)
+#define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL)
+#define OPL_TYPE_Y8950 (OPL_TYPE_ADPCM|OPL_TYPE_KEYBOARD|OPL_TYPE_IO)
+
+FM_OPL *OPLCreate(int type, int clock, int rate);
+void OPLDestroy(FM_OPL *OPL);
+void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset);
+void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param);
+void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param);
+/* Y8950 port handlers */
+void OPLSetPortHandler(FM_OPL *OPL,OPL_PORTHANDLER_W PortHandler_w,OPL_PORTHANDLER_R PortHandler_r,int param);
+void OPLSetKeyboardHandler(FM_OPL *OPL,OPL_PORTHANDLER_W KeyboardHandler_w,OPL_PORTHANDLER_R KeyboardHandler_r,int param);
+
+void OPLResetChip(FM_OPL *OPL);
+int OPLWrite(FM_OPL *OPL,int a,int v);
+unsigned char OPLRead(FM_OPL *OPL,int a);
+int OPLTimerOver(FM_OPL *OPL,int c);
+
+/* YM3626/YM3812 local section */
+void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length);
+
+void Y8950UpdateOne(FM_OPL *OPL, INT16 *buffer, int length);
+
+#endif
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