cst_ld8c.h

语音编码G.729 语音编码G.729

/*
**
** File:        "cst_ld8a.h"
**
** Description:  This file contains global definition of the
**    CS-ACELP Coder for 8 kbps.
**
*/

#ifndef _CST_LD8C_H_INCL_
#define _CST_LD8C_H_INCL_

#include "ld8k.h"
#include "ld8cp.h"
#include "vad.h"
#include "sid.h"
#include "dtx.h"

/*
   Used structures
*/
struct cod_state_t
{
	/* Speech vector */
	FLOAT old_speech[L_TOTAL];
	FLOAT *speech, *p_window;
	FLOAT *new_speech;                       /* Global variable */

	/* Weighted speech vector */
	FLOAT old_wsp[L_FRAME+PIT_MAX];
	FLOAT *wsp;

	/* Excitation vector */
	FLOAT old_exc[L_FRAME+PIT_MAX+L_INTERPOL];
	FLOAT *exc;

	/* Zero vector */
	FLOAT ai_zero[L_SUBFR+M_BWDP1];
	FLOAT *zero;

	/* Lsp (Line spectral pairs) */
	FLOAT lsp_old[M];
	FLOAT lsp_old_q[M];

	/* Filter's memory */
	FLOAT mem_syn[M_BWD], mem_w0[M_BWD], mem_w[M_BWD];
	FLOAT mem_err[M_BWD+L_SUBFR], *error;
	FLOAT pit_sharp;

	/* For G.729B */
	/* DTX variables */
	int   pastVad;
	int   ppastVad;
	INT16 seed;

	/* for G.729E */
	/* for the backward analysis */
	FLOAT prev_filter[M_BWDP1]; /* Previous selected filter */

	FLOAT rexp[M_BWDP1];
	FLOAT synth[L_ANA_BWD];
	FLOAT *synth_ptr;
	int   prev_lp_mode ;
	FLOAT gamma1[2], gamma2[2];       /* Weighting factor for the 2 subframes */
	FLOAT A_t_bwd_mem[M_BWDP1];
	int   bwd_dominant;
	FLOAT C_int;              /* See file bwfw.c */
	INT16 glob_stat;  /* Mesure of global stationnarity */
	INT16 stat_bwd;       /* Nbre of consecutive backward frames */
	INT16 val_stat_bwd;   /* Value associated with stat_bwd */

	/* Last backward A(z) for case of unstable filter */
	FLOAT old_A_bwd[M_BWDP1];
	FLOAT old_rc_bwd[2];
	/* Last forkward A(z) for case of unstable filter */
	FLOAT old_A_fwd[MP1];
	FLOAT old_rc_fwd[2];
	//FLOAT freq_prev[MA_NP][M];    /* previous LSP vector       */

	int   lag_buf[5];
	FLOAT pgain_buf[5];

	int   d4i40_17_extra;

	struct lsp_cod_state_t lsp_s;
	struct cod_cng_state_t cng_s;
	struct vad_state_t vad_s;
	struct gain_state_t gain_s;
	struct bwd_state_t bwd_s;
	struct musdet_state_t mus_s;
	struct pwf_state_t pwf_s;
};

struct dec_state_t
{
	/* Excitation vector */
	FLOAT old_exc[L_FRAME+PIT_MAX+L_INTERPOL];
	FLOAT *exc;

	/* Lsp (Line spectral pairs) */
	FLOAT lsp_old[M];
    
	FLOAT mem_syn[M_BWD];        /* Filter's memory */

	FLOAT sharp ;            /* pitch sharpening of previous fr */
	FLOAT gain_code;         /* fixed codebook gain */
	FLOAT gain_pitch ;       /* adaptive codebook gain */
	int   prev_t0;         /* integer delay of previous frame    */
	int   prev_t0_frac;    /* integer delay of previous frame    */

	/* for G.729B */
	INT16 seed_fer;
	/* CNG variables */
	int   past_ftyp;
	INT16 seed;
	FLOAT sid_sav;

	/* for the backward analysis */
	FLOAT rexp[M_BWDP1];
	FLOAT A_bwd_mem[M_BWDP1];
	FLOAT A_t_bwd_mem[M_BWDP1];
	int   prev_voicing, prev_bfi, prev_lp_mode;
	FLOAT c_fe, c_int;
	FLOAT prev_filter[M_BWDP1]; /* Previous selected filter */
	int   prev_pitch;
	int   stat_pitch;
	int   pitch_sta, frac_sta;

	/* Last backward A(z) for case of unstable filter */
	FLOAT old_A_bwd[M_BWDP1];
	FLOAT old_rc_bwd[2];

	FLOAT gain_pit_mem;
	FLOAT gain_cod_mem;
	FLOAT c_muting;
	int   count_bfi;
	int   stat_bwd;

	struct lsp_dec_state_t lsp_s;
	struct dec_cng_state_t cng_s;
	struct gain_state_t gain_s;
	struct bwd_state_t bwd_s;
};

#endif /* _CST_LD8C_H_INCL_ */