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/* 
** 
** File:        "cst_lbc.h" 
** 
** Description:  This file contains global definition of the SG15 
**    LBC Coder for 6.3/5.3 kbps. 
** 
*/ 
 
 
/* 
    ITU-T G.723 Speech Coder   ANSI-C Source Code     Version 4.1 
    copyright (c) 1995, AudioCodes, DSP Group, France Telecom, 
    Universite de Sherbrooke.  All rights reserved. 
*/ 
 
#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           (short) 0xc000            /* -0.25*2 */ 
 
#define  LspPrd0           12288 
#define  LspPrd1           23552 
 
#define  LspQntBands       3 
#define  LspCbSize         256 
#define  LspCbBits         8 
 
/* LTP constants */ 
#define  PitchMin          18 
#define  PitchMax          (PitchMin+127) 
#define  PwConst           (short) 0x2800 
#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  16384  /* 0.5 = 16384 in Q15 */ 
#define max_time   120 
 
/* 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                (int)4  /* scaling factor */ 
#define ThreshErr           0x40000000L 
#define DEC                 (30 - 7) 
 
/* 
   Used structures 
*/ 
typedef  struct   { 
   /* High pass variables */ 
   short   HpfZdl   ; 
   int   HpfPdl   ; 
 
   /* Sine wave detector */ 
   short   SinDet   ; 
 
   /* Lsp previous vector */ 
   short   PrevLsp[LpcOrder] ; 
 
   /* All pitch operation buffers */ 
   short   PrevWgt[PitchMax] ; 
   short   PrevErr[PitchMax] ; 
   short   PrevExc[PitchMax] ; 
 
   /* Required memory for the delay */ 
   short   PrevDat[LpcFrame-SubFrLen] ; 
 
   /* Used delay lines */ 
   short   WghtFirDl[LpcOrder] ; 
   short   WghtIirDl[LpcOrder] ; 
   short   RingFirDl[LpcOrder] ; 
   short   RingIirDl[LpcOrder] ; 
 
   /* Taming procedure errors */ 
   int Err[SizErr]; 
 
   } CODSTATDEF  ; 
 
typedef  struct   { 
   short   Ecount ; 
   short   InterGain ; 
   short   InterIndx ; 
   short   Rseed ; 
   short   Park  ; 
   short   Gain  ; 
   /* Lsp previous vector */ 
   short   PrevLsp[LpcOrder] ; 
 
   /* All pitch operation buffers */ 
   short   PrevExc[PitchMax] ; 
 
   /* Used delay lines */ 
   short   SyntIirDl[LpcOrder] ; 
   short   PostFirDl[LpcOrder] ; 
   short   PostIirDl[LpcOrder] ; 
 
   } DECSTATDEF  ; 
 
   /* subframe coded parameters */ 
typedef  struct   { 
   short   AcLg  ; 
   short   AcGn  ; 
   short   Mamp  ; 
   short   Grid  ; 
   short   Tran  ; 
   short   Pamp  ; 
   int   Ppos  ; 
   } SFSDEF ; 
 
   /* frame coded parameters */ 
typedef  struct   { 
   short   Crc   ; 
   int   LspId ; 
   short   Olp[SubFrames/2] ; 
   SFSDEF   Sfs[SubFrames] ; 
   } LINEDEF ; 
 
   /* harmonic noise shaping filter parameters */ 
typedef  struct   { 
   short   Indx  ; 
   short   Gain  ; 
   } PWDEF  ; 
 
   /* pitch postfilter parameters */ 
typedef  struct   { 
   short   Indx  ; 
   short   Gain  ; 
   short   ScGn  ; 
   } PFDEF  ; 
 
   /* best excitation vector parameters for the high rate */ 
typedef  struct { 
   int   MaxErr   ; 
   short   GridId   ; 
   short   MampId   ; 
   short   UseTrn   ; 
   short   Ploc[MaxPulseNum] ; 
   short   Pamp[MaxPulseNum] ; 
   } BESTDEF ;