#ifndef _EMU2413_H_
#define _EMU2413_H_

#include "emutypes.h"

#ifdef EMU2413_DLL_EXPORTS
  #define EMU2413_API __declspec(dllexport)
#elif defined(EMU2413_DLL_IMPORTS)
  #define EMU2413_API __declspec(dllimport)
#else
  #define EMU2413_API
#endif

#ifdef __cplusplus
extern "C" {
#endif

#define PI 3.14159265358979323846

enum {OPLL_VRC7_TONE=0} ;

/* voice data */
typedef struct {
  e_uint32 TL,FB,EG,ML,AR,DR,SL,RR,KR,KL,AM,PM,WF ;
} OPLL_PATCH ;

/* slot */
typedef struct {

  OPLL_PATCH patch;

  e_int32 type ;          /* 0 : modulator 1 : carrier */

  /* OUTPUT */
  e_int32 feedback ;
  e_int32 output[2] ;   /* Output value of slot */

  /* for Phase Generator (PG) */
  e_uint16 *sintbl ;    /* Wavetable */
  e_uint32 phase ;      /* Phase */
  e_uint32 dphase ;     /* Phase increment amount */
  e_uint32 pgout ;      /* output */

  /* for Envelope Generator (EG) */
  e_int32 fnum ;          /* F-Number */
  e_int32 block ;         /* Block */
  e_int32 volume ;        /* Current volume */
  e_int32 sustine ;       /* Sustine 1 = ON, 0 = OFF */
  e_uint32 tll ;              /* Total Level + Key scale level*/
  e_uint32 rks ;        /* Key scale offset (Rks) */
  e_int32 eg_mode ;       /* Current state */
  e_uint32 eg_phase ;   /* Phase */
  e_uint32 eg_dphase ;  /* Phase increment amount */
  e_uint32 egout ;      /* output */

} OPLL_SLOT ;

/* Mask */
#define OPLL_MASK_CH(x) (1<<(x))

/* opll */
typedef struct {

  e_uint32 adr ;
  e_int32 out ;

#ifndef EMU2413_COMPACTION
  e_uint32 realstep ;
  e_uint32 oplltime ;
  e_uint32 opllstep ;
  e_int32 prev, next ;
#endif

  /* Register */
  e_uint8 LowFreq[6];
  e_uint8 HiFreq[6];
  e_uint8 InstVol[6];

  e_uint8 CustInst[8];

  e_int32 slot_on_flag[6 * 2] ;

  /* Pitch Modulator */
  e_uint32 pm_phase ;
  e_int32 lfo_pm ;

  /* Amp Modulator */
  e_int32 am_phase ;
  e_int32 lfo_am ;

  e_uint32 quality;

  /* Channel Data */
  e_int32 patch_number[6];
  e_int32 key_status[6] ;

  /* Slot */
  OPLL_SLOT slot[6 * 2] ;

  e_uint32 mask ;

} OPLL ;

/* Create Object */
EMU2413_API OPLL *OPLL_new(e_uint32 clk, e_uint32 rate) ;
EMU2413_API void OPLL_delete(OPLL *) ;

/* Setup */
EMU2413_API void OPLL_reset(OPLL *) ;
EMU2413_API void OPLL_set_rate(OPLL *opll, e_uint32 r) ;
EMU2413_API void OPLL_set_quality(OPLL *opll, e_uint32 q) ;

/* Port/Register access */
EMU2413_API void OPLL_writeIO(OPLL *, e_uint32 reg, e_uint32 val) ;
EMU2413_API void OPLL_writeReg(OPLL *, e_uint32 reg, e_uint32 val) ;

/* Synthsize */
EMU2413_API e_int16 OPLL_calc(OPLL *) ;

/* Misc */
EMU2413_API void OPLL_forceRefresh(OPLL *) ;

/* Channel Mask */
EMU2413_API e_uint32 OPLL_setMask(OPLL *, e_uint32 mask) ;
EMU2413_API e_uint32 OPLL_toggleMask(OPLL *, e_uint32 mask) ;


void moocow(OPLL* opll, e_int32 *buf, e_int32 len, int shift);

#ifdef __cplusplus
}
#endif

#endif