g723api.h

rtp在linux下的实现

/***************************************************************************/
/* File Name: g723api.h														*/
/* Function: defines the application programming interface (API) of         */
/*           the G.723.1 Compliant Speech coder								*/
/*      Copyright (C) 1996-98 MiBridge Inc									*/
/***************************************************************************/

#ifndef __g723api__
#define __g723api__

//#include <windows.h>


#define G723_FRAMESIZE		240
#define G723_53_PACKSIZE	20
#define G723_63_PACKSIZE	24


#define G723_INITIALIZE			0
#define G723_INIT_ENCODE		1
#define G723_INIT_DECODE		2
#define G723_INIT_MIBRIDGE		3
#define G723_53_ENCODER			4
#define G723_63_ENCODER			5
#define G723_NOISE_ENCODER		6
#define G723_DECODER			7


/* Intel Suggestion - macro for doing integer compare */
/* on floating point numbers			      */
#define asint(x) (*(int *)&(x))

/* Ray's li'l debug corner */

/* #define T_CODE1	*/			/* enable Estim_Pitch() monitor		*/
/* #define T_CODE2	*/			/* enable Loop_Srch() monitor		*/
/* #define T_CODE3	*/			/* enable DotProd() monitor			*/
/* #define T_CODE4	*/			/* enable Lpc() monitor				*/
/* #define T_CODE5	*/			/* enable Main_Loop() monitor		*/
/* #define T_CODE6	*/			/* enable Find_Best() monitor		*/

#define USEHP					/* Hardwires HPF into algorithm		*/
#define USEPF					/* Hardwires PF into algorithm		*/
#define NOCLIP					/* Don't count clips				*/


#define  False 0
#define  True  1

/* Definition of the working mode */
enum  Wmode {Both, Cod, Dec};

/* Coder rate */
enum  Crate    {Rate63, Rate53};

/* Coder global constants */
#define  Frame       240
#define  LpcFrame    180
#define  SubFrames   4
#define  SubFrLen    (Frame/SubFrames)

/* LPC constants */
#define  LpcOrder          10
#define  RidgeFact         10
#define  CosineTableSize   512
#define  PreCoef           (float)-0.25

#define  LspPred0          ((float)12.0/(float)32.0)
#define  LspPred1          ((float)23.0/(float)32.0)

#define  LspQntBands       3
#define  LspCbSize         256
#define  LspCbBits         8

/* LTP constants */
#define  PitchMin          18
#define  PitchMax          (PitchMin+127)
#define  PwRange           3
#define  ClPitchOrd        5
#define  Pstep             1
#define NbFilt085           85
#define NbFilt170           170

/* MP-MLQ constants */
#define  Sgrid             2
#define  MaxPulseNum       6
#define  MlqSteps          2

/* acelp constants */

#define SubFrLen2          (SubFrLen +4)
#define DIM_RR             416
#define NB_POS             8
#define STEP               8
#define MSIZE              64
#define threshold          (float)0.5
#define max_time           120
#define  Inf		1.0e38

/* Gain constant */
#define  NumOfGainLev      24

/* FER constant */
#define  ErrMaxNum         3

/* Taming constants */
#define NbFilt085_min       51
#define NbFilt170_min       93
#define SizErr              5
#define Err0                  0.00000381464f
#define ThreshErr           128.0f

#define MAXV 256.0f

/*   Used structures */

typedef  struct   {
/* High pass variables */
   float    HpfZdl;
   float    HpfPdl;
/* Lsp previos vector */
   float   PrevLsp[LpcOrder];

/* All pitch operation buffers */
   float    PrevWgt[PitchMax];
   float    PrevErr[PitchMax];
   float    PrevExc[PitchMax];

/* Requered memory for the delay */
   float   PrevDat[LpcFrame-SubFrLen];

/* Used delay lines */
   float    WghtFirDl[LpcOrder];
   float    WghtIirDl[LpcOrder];
   float    RingFirDl[LpcOrder];
   float    RingIirDl[LpcOrder];
   float	pamp_64[NumOfGainLev][SubFrLen];

/* For taming procedure */

   int      SinDet;
   float    Err[SizErr];
   int		ResetFlag;

   } CODSTATDEF;

typedef  struct   {
   int     Ecount;
   float   InterGain;
   int     InterIndx;
   unsigned short  Rseed;
   unsigned short  seed[2];
   float   Park;
   float   Gain;
/* Lsp previous vector */
   float   PrevLsp[LpcOrder];

/* All pitch operation buffers */
   float   PrevExc[PitchMax];

/* Used delay lines */
   float   SyntIirDl[LpcOrder];
   float   PostFirDl[LpcOrder];
   float   PostIirDl[LpcOrder];

   } DECSTATDEF ;

typedef struct	{
	CODSTATDEF	encstate;
	DECSTATDEF	decstate;
	float pamp_64[NumOfGainLev][SubFrLen];
} g723Mem;

/* subframe coded parameters */
typedef  struct   {
   int      AcLg;
   int      AcGn;
   int      Mamp;
   int      Grid;
   int      Tran;
   int      Pamp;
   unsigned int   Ppos;
   } SFSDEF;

/* frame coded parameters */
typedef  struct   {
   int      Crc;
   unsigned int   LspId;
   int      Olp[SubFrames/2];
   SFSDEF   Sfs[SubFrames];
   } LINEDEF;

/* harmonic noise shaping filter parameters */
typedef  struct   {
   int   Indx;
   float Gain;
   } PWDEF;

/* pitch postfilter parameters */
typedef  struct   {
   int     Indx;
   float   Gain;
   float   ScGn;
   } PFDEF;

/* best excitation vector parameters for the high rate */
typedef  struct {
   float    MaxErr;
   int      GridId;
   int      MampId;
   int      UseTrn;
   int      Ploc[MaxPulseNum];
   float    Pamp[MaxPulseNum];
   } BESTDEF;

extern int g723(g723Mem *mem, short *SamBuf,char *BSbuf,int mode, int quality);

#endif