#ifndef __FMOPL_H_
#define __FMOPL_H_
#define HAS_YM3812 1
/* --- select emulation chips --- */
#define BUILD_YM3812 (HAS_YM3812)
#define BUILD_YM3526 (HAS_YM3526)
#define BUILD_Y8950 (HAS_Y8950)
/* select output bits size of output : 8 or 16 */
#define OPL_SAMPLE_BITS 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_SAMPLE_BITS==16)
typedef INT16 OPLSAMPLE;
#endif
#if (OPL_SAMPLE_BITS==8)
typedef INT8 OPLSAMPLE;
#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);
#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 */
/* ---------- 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)
typedef struct{
UINT32 ar; /* attack rate: AR<<2 */
UINT32 dr; /* decay rate: DR<<2 */
UINT32 rr; /* release rate:RR<<2 */
UINT8 KSR; /* key scale rate */
UINT8 ksl; /* keyscale level */
UINT8 ksr; /* key scale rate: kcode>>KSR */
UINT8 mul; /* multiple: mul_tab[ML] */
/* Phase Generator */
UINT32 Cnt; /* frequency counter */
UINT32 Incr; /* frequency counter step */
UINT8 FB; /* feedback shift value */
INT32 *connect1; /* slot1 output pointer */
INT32 op1_out[2]; /* slot1 output for feedback */
UINT8 CON; /* connection (algorithm) type */
/* Envelope Generator */
UINT8 eg_type; /* percussive/non-percussive mode */
UINT8 state; /* phase type */
UINT32 TL; /* total level: TL << 2 */
INT32 TLL; /* adjusted now TL */
INT32 volume; /* envelope counter */
UINT32 sl; /* sustain level: sl_tab[SL] */
UINT8 eg_sh_ar; /* (attack state) */
UINT8 eg_sel_ar; /* (attack state) */
UINT8 eg_sh_dr; /* (decay state) */
UINT8 eg_sel_dr; /* (decay state) */
UINT8 eg_sh_rr; /* (release state) */
UINT8 eg_sel_rr; /* (release state) */
UINT32 key; /* 0 = KEY OFF, >0 = KEY ON */
/* LFO */
UINT32 AMmask; /* LFO Amplitude Modulation enable mask */
UINT8 vib; /* LFO Phase Modulation enable flag (active high)*/
/* waveform select */
unsigned int wavetable;
} OPL_SLOT;
typedef struct{
OPL_SLOT SLOT[2];
/* phase generator state */
UINT32 block_fnum; /* block+fnum */
UINT32 fc; /* Freq. Increment base */
UINT32 ksl_base; /* KeyScaleLevel Base step */
UINT8 kcode; /* key code (for key scaling) */
} OPL_CH;
/* OPL state */
typedef struct fm_opl_f {
/* FM channel slots */
OPL_CH P_CH[9]; /* OPL/OPL2 chips have 9 channels*/
UINT32 eg_cnt; /* global envelope generator counter */
UINT32 eg_timer; /* global envelope generator counter works at frequency = chipclock/72 */
UINT32 eg_timer_add; /* step of eg_timer */
UINT32 eg_timer_overflow; /* envelope generator timer overlfows every 1 sample (on real chip) */
UINT8 rhythm; /* Rhythm mode */
UINT32 fn_tab[1024]; /* fnumber->increment counter */
/* LFO */
UINT8 lfo_am_depth;
UINT8 lfo_pm_depth_range;
UINT32 lfo_am_cnt;
UINT32 lfo_am_inc;
UINT32 lfo_pm_cnt;
UINT32 lfo_pm_inc;
UINT32 noise_rng; /* 23 bit noise shift register */
UINT32 noise_p; /* current noise 'phase' */
UINT32 noise_f; /* current noise period */
UINT8 wavesel; /* waveform select enable flag */
int T[2]; /* timer counters */
UINT8 st[2]; /* timer enable */
#if BUILD_Y8950
/* Delta-T ADPCM unit (Y8950) */
YM_DELTAT *deltat;
/* Keyboard and I/O ports interface */
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;
#endif
/* external event callback handlers */
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 */
UINT8 type; /* chip type */
UINT8 address; /* address register */
UINT8 status; /* status flag */
UINT8 statusmask; /* status mask */
UINT8 mode; /* Reg.08 : CSM,notesel,etc. */
int clock; /* master clock (Hz) */
int rate; /* sampling rate (Hz) */
double freqbase; /* frequency base */
double TimerBase; /* Timer base time (==sampling time)*/
} FM_OPL;
extern FM_OPL *OPLCreate(int type, int clock, int rate);
extern void OPLDestroy(FM_OPL *OPL);
extern int OPLWrite(FM_OPL *OPL,int a,int v);
extern void OPLResetChip(FM_OPL *OPL);
#if BUILD_YM3812
int YM3812Init(int num, int clock, int rate);
void YM3812Shutdown(void);
void YM3812ResetChip(int which);
int YM3812Write(int which, int a, int v);
unsigned char YM3812Read(int which, int a);
int YM3812TimerOver(int which, int c);
void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length);
void YM3812SetTimerHandler(int which, OPL_TIMERHANDLER TimerHandler, int channelOffset);
void YM3812SetIRQHandler(int which, OPL_IRQHANDLER IRQHandler, int param);
void YM3812SetUpdateHandler(int which, OPL_UPDATEHANDLER UpdateHandler, int param);
#endif
#if BUILD_YM3526
/*
** Initialize YM3526 emulator(s).
**
** 'num' is the number of virtual YM3526's to allocate
** 'clock' is the chip clock in Hz
** 'rate' is sampling rate
*/
int YM3526Init(int num, int clock, int rate);
/* shutdown the YM3526 emulators*/
void YM3526Shutdown(void);
void YM3526ResetChip(int which);
int YM3526Write(int which, int a, int v);
unsigned char YM3526Read(int which, int a);
int YM3526TimerOver(int which, int c);
/*
** Generate samples for one of the YM3526's
**
** 'which' is the virtual YM3526 number
** '*buffer' is the output buffer pointer
** 'length' is the number of samples that should be generated
*/
void YM3526UpdateOne(int which, INT16 *buffer, int length);
void YM3526SetTimerHandler(int which, OPL_TIMERHANDLER TimerHandler, int channelOffset);
void YM3526SetIRQHandler(int which, OPL_IRQHANDLER IRQHandler, int param);
void YM3526SetUpdateHandler(int which, OPL_UPDATEHANDLER UpdateHandler, int param);
#endif
#if BUILD_Y8950
/* Y8950 port handlers */
void Y8950SetPortHandler(int which, OPL_PORTHANDLER_W PortHandler_w, OPL_PORTHANDLER_R PortHandler_r, int param);
void Y8950SetKeyboardHandler(int which, OPL_PORTHANDLER_W KeyboardHandler_w, OPL_PORTHANDLER_R KeyboardHandler_r, int param);
void Y8950SetDeltaTMemory(int which, void * deltat_mem_ptr, int deltat_mem_size );
int Y8950Init (int num, int clock, int rate);
void Y8950Shutdown (void);
void Y8950ResetChip (int which);
int Y8950Write (int which, int a, int v);
unsigned char Y8950Read (int which, int a);
int Y8950TimerOver (int which, int c);
void Y8950UpdateOne (int which, INT16 *buffer, int length);
void Y8950SetTimerHandler (int which, OPL_TIMERHANDLER TimerHandler, int channelOffset);
void Y8950SetIRQHandler (int which, OPL_IRQHANDLER IRQHandler, int param);
void Y8950SetUpdateHandler (int which, OPL_UPDATEHANDLER UpdateHandler, int param);
#endif
#endif /* __FMOPL_H_ */