g729ev_g729_ld8k.h

最新的ITU-T的宽带语音编解码标准G.729.1,是对原先的G.729的最好的调整.码流输出速率可以进行自适应调整.满足未来通信要求.希望对大家有所帮助.

/* ITU-T G.729EV Optimization/Characterization Candidate                         */
/* Version:       1.0.a                                                          */
/* Revision Date: June 28, 2006                                                  */

/*
   ITU-T G.729EV Optimization/Characterization Candidate    ANSI-C Source Code
   Copyright (c) 2006 
   France Telecom, Matsushita Electric, Mindspeed, Siemens AG, ETRI, VoiceAge Corp.
   All rights reserved
*/

#ifndef __G729EV_G729_LD8K_H__
#define __G729EV_G729_LD8K_H__

/*--------------------------------------------------------------*
 * LD8K.H                                                       *
 * ~~~~~~                                                       *
 * Function prototypes and constants use in G.729               *
 *                                                              *
 *--------------------------------------------------------------*/

#include <stdio.h>
#include "stl.h"
#include "G729EV_G729_defines.h"
#include "G729EV_G729_CodStat.h"
#include "G729EV_G729_DecStat.h"
#include "G729EV_MAIN_filt.h"
#include "G729EV_MAIN_defines.h"


/*--------------------------------------------------------------------------*
 * LPC analysis and filtering                                               *
 *--------------------------------------------------------------------------*/

void      G729EV_G729_AutocorrLPC(Word16 x[],   /* (i)     : input signal                               */
                                  Word16 m,     /* (i)     : LPC order                                  */
                                  Word16 r_h[], /* (o)     : autocorrelations  (msb)                    */
                                  Word16 r_l[]  /* (o)     : autocorrelations  (lsb)                    */
    );

void      G729EV_G729_Lag_window(Word16 m,      /* (i)     : LPC order                                  */
                                 Word16 r_h[],  /* (i/o)   : autocorrelations  (msb)                    */
                                 Word16 r_l[]   /* (i/o)   : autocorrelations  (lsb)                    */
    );

void      G729EV_G729_Levinson(Word16 Rh[], /* (i)     : Rh[m+1] autocorrelation coefficients (msb) */
                               Word16 Rl[], /* (i)     : Rl[m+1] autocorrelation coefficients (lsb) */
                               Word16 A[],  /* (o) Q12 : A[m]    LPC coefficients  (m = 10)         */
                               Word16 rc[], /* (o) Q15 : rc[M]   Reflection coefficients.           */
                               Word16 old_A[], Word16 old_rc[]);

void      G729EV_G729_Az_lsp(Word16 a[],      /* (i) Q12 : predictor coefficients                     */
                             Word16 lsp[],    /* (o) Q15 : line spectral pairs                        */
                             Word16 old_lsp[] /* (i)     : old lsp[] (in case not found 10 roots)     */
    );

void      G729EV_G729_Lsp_Az(Word16 lsp[],  /* (i) Q15 : line spectral frequencies                  */
                             Word16 a[]     /* (o) Q12 : predictor coefficients (order = 10)        */
    );


void      G729EV_G729_Lsp_lsf(Word16 lsp[], /* (i) Q15 : lsp[m] (range: -1<=val<1)                  */
                              Word16 lsf[], /* (o) Q15 : lsf[m] normalized (range: 0.0<=val<=0.5)   */
                              Word16 m      /* (i)     : LPC order                                  */
    );

void      G729EV_G729_Int_lpc(Word16 lsp_old[], /* (i)    : LSP vector of past frame                   */
                              Word16 lsp_new[], /* (i)    : LSP vector of present frame                */
                              Word16 lsf_int[], /* (o)    : interpolated lsf coefficients              */
                              Word16 lsf_new[], /* (o)    : new lsf coefficients                       */
                              Word16 Az[]       /* (o)    : interpolated Az() for the 2 subframes      */
    );

void      G729EV_G729_Int_qlpc(Word16 lsp_old[],  /* (i)    : LSP vector of past frame                   */
                               Word16 lsp_new[],  /* (i)    : LSP vector of present frame                */
                               Word16 Az[]        /* (o)    : interpolated Az() for the 2 subframes      */
    );

/*--------------------------------------------------------------------------*
 *       PWF functions                                                  *
 *--------------------------------------------------------------------------*/

void      G729EV_G729_perc_var(Word16 * gamma1, /* bandwidth expansion parameter                        */
                               Word16 * gamma2, /* bandwidth expansion parameter                        */
                               Word16 * lsfint, /* Interpolated LSP vector : 1st subframe               */
                               Word16 * lsfnew, /* New LSP vector : 2nd subframe                        */
                               Word16 * r_c,    /* Reflection coefficients                              */
                               Word16 * smooth, Word16 LarOld[2]);

void      G729EV_G729_Weight_Az(Word16 a[],   /* (i) Q12 : a[m+1]  LPC coefficients                   */
                                Word16 gamma, /* (i) Q15 : Spectral expansion factor.                 */
                                Word16 m,     /* (i)     : LPC order.                                 */
                                Word16 ap[]   /* (o) Q12 : Spectral expanded LPC coefficients         */
    );

void      G729EV_G729_Residu(Word16 a[],  /* (i) Q12 : prediction coefficients                    */
                             Word16 x[],  /* (i) Q0  : speech (values x[-m..-1] are needed (m=10) */
                             Word16 y[],  /* (o) Q0  : residual signal                            */
                             Word16 lg    /* (i)     : frame size                                 */
    );

/* Same as G729EV_G729_Residu except the ouput is set to Q1 instead of Q0 */

void      G729EV_G729_Residu2(Word16 a[], /* (i) Q12 : prediction coefficients                    */
                              Word16 x[], /* (i)  Q0  : speech (values x[-m..-1] are needed (m=10) */
                              Word16 y[], /* (o)  Q1  : residual signal                            */
                              Word16 lg   /* (i)     : frame size                                 */
    );

void      G729EV_G729_Syn_filt(Word16 a[],    /* (i) Q12 : a[m+1] prediction coefficients   (m=10)    */
                               Word16 x[],    /* (i) Q0  : input signal                               */
                               Word16 y[],    /* (o) Q0  : output signal                              */
                               Word16 lg,     /* (i)     : size of filtering                          */
                               Word16 mem[],  /* (i/o)   : memory associated with this filtering.     */
                               Word16 update  /* (i)     : 0=no update, 1=update of memory.           */
    );

/* Same as G729EV_G729_Syn_filt except the input x is in Q1 instead of Q0 */
void      G729EV_G729_Syn_filt2(Word16 a[],   /* (i) Q12 : a[m+1] prediction coefficients   (m=10)    */
                                Word16 x[],   /* (i)  Q1  : input signal                               */
                                Word16 y[],   /* (o)  Q0  : output signal                              */
                                Word16 lg,    /* (i)     : size of filtering                          */
                                Word16 mem[], /* (i/o)   : memory associated with this filtering.     */
                                Word16 update /* (i)     : 0=no update, 1=update of memory.           */
    );

void      G729EV_G729_Convolve(Word16 x[],  /* (i)     : input vector                               */
                               Word16 h[],  /* (i) Q12 : impulse response                           */
                               Word16 y[],  /* (o)     : output vector                              */
                               Word16 L     /* (i)     : vector size                                */
    );

/*--------------------------------------------------------------------------*
 * Pitch functions.                                                         *
 *--------------------------------------------------------------------------*/

Word16    G729EV_G729_Pitch_ol( /* (o)     : open loop pitch lag                        */
                                Word16 signal[],  /* (i)     : signal used to compute the open loop pitch */
                                                  /*       signal[-pit_max] to signal[-1] should be known */
                                Word16 pit_min,   /* (i)     : minimum pitch lag                          */
                                Word16 pit_max,   /* (i)     : maximum pitch lag                          */
                                Word16 L_frame,   /* (i)     : length of frame to compute pitch           */
                                Word16 * voicing, Word16 * pit_old);

Word16    G729EV_G729_Pitch_fr3(  /* (o)     : pitch period.                              */
                                 Word16 exc[],  /* (i)     : excitation buffer                          */
                                 Word16 xn[],   /* (i)     : target vector                              */
                                 Word16 h[],    /* (i) Q12 : impulse response of filters.               */
                                 Word16 L_subfr,/* (i)     : length of subframe                         */
                                 Word16 t0_min, /* (i)     : minimum value in the searched range.       */
                                 Word16 t0_max, /* (i)     : maximum value in the searched range.       */
                                 Word16 i_subfr,/* (i)     : indicator for first subframe.              */
                                 Word16 * pit_frac  /* (o)     : chosen fraction.                           */
    );

Word16    G729EV_G729_G_pitch(  /* (o) Q14 : Gain of pitch lag saturated to 1.2         */
                               Word16 xn[],      /* (i)     : Pitch target.                              */
                               Word16 y1[],      /* (i)     : Filtered adaptive codebook.                */
                               Word16 g_coeff[], /* (i)     : Correlations need for gain quantization.   */
                               Word16 L_subfr    /* (i)     : Length of subframe.                        */
    );

Word16    G729EV_G729_Enc_lag3( /* (o)     : Return index of encoding                   */
                                Word16 T0,      /* (i)     : Pitch delay                                */
                                Word16 T0_frac, /* (i)     : Fractional pitch delay                     */
                                Word16 * T0_min,/* (i/o)   : Minimum search delay                       */
                                Word16 * T0_max,/* (i/o)   : Maximum search delay                       */
                                Word16 pit_min, /* (i)     : Minimum pitch delay                        */
                                Word16 pit_max, /* (i)     : Maximum pitch delay                        */
                                Word16 pit_flag /* (i)     : Flag for 1st subframe                      */
    );

void      G729EV_G729_Dec_lag3( /* (o)     : return integer pitch lag                   */
                                Word16 index,    /* (i)     : received pitch index                       */
                                Word16 pit_min,  /* (i)     : minimum pitch lag                          */
                                Word16 pit_max,  /* (i)     : maximum pitch lag                          */
                                Word16 i_subfr,  /* (i)     : subframe flag                              */
                                Word16 * T0,     /* (o)     : integer part of pitch lag                  */
                                Word16 * T0_frac /* (o)     : fractional part of pitch lag               */
    );

Word16    G729EV_G729_Interpol_3( /* (o)     : interpolated value                         */
                                  Word16 * x, /* (i)     : input vector                               */
                                  Word16 frac /* (i)     : fraction                                   */
    );

void      G729EV_G729_Pred_lt_3(Word16 exc[], /* (i/o)   : excitation buffer                          */
                                Word16 T0,    /* (i)     : integer pitch lag                          */
                                Word16 frac,  /* (i)     : fraction of lag                            */
                                Word16 L_subfr/* (i)     : subframe size                              */
    );

Word16    G729EV_G729_Parity_Pitch( /* (o)    : parity bit (XOR of 6 MSB bits)             */
                                    Word16 pitch_index  /* (i)    : index for which parity to compute          */
    );

Word16    G729EV_G729_Check_Parity_Pitch( /* (o) : 0 = no error, 1= error                  */
                                          Word16 pitch_index, /* (i)   : index of parameter                         */
                                          Word16 parity       /* (i)   : parity bit                                 */
    );

/*--------------------------------------------------------------------------*
 * fixed codebook excitation.                                               *
 *--------------------------------------------------------------------------*/


/*--------------------------------------------------------------------------*
 * FCB functions.                                                           *
 *--------------------------------------------------------------------------*/

void      G729EV_G729_Cor_h(Word16 * H, /* (i) Q12 :Impulse response of filters */
                            Word16 * rr /* (o)     :Correlations of H[]         */
    );
void      G729EV_G729_Cor_h_X(Word16 h[], /* (i) Q12 :Impulse response of filters      */
                              Word16 X[], /* (i) Q12 :Target vector                    */
                              Word16 D[], /* (o)     :Correlations between h[] and D[] */
                              /*          Normalized to 13 bits            */
                              Word16 stp);


void      G729EV_G729_Decod_ACELP(Word16 sign,  /* (i)     : signs of 4 pulses.                         */
                                  Word16 index, /* (i)     : Positions of the 4 pulses.                 */
                                  Word16 cod[]  /* (o) Q13 : algebraic (fixed) codebook excitation      */
    );


/*--------------------------------------------------------------------------*
 * LSP VQ functions.                                                        *
 *--------------------------------------------------------------------------*/

void      G729EV_G729_Lsf_lsp2(Word16 lsf[],  /* (i) Q13 : lsf[m] (range: 0.0<=val<PI)                */