view libtwamr/d_plsf.c @ 485:751f06541fbb

doc/Codec-utils: clarify lack of DHF in gsmfr-decode-rb
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 20 May 2024 01:47:22 +0000
parents 3f574255c3aa
children
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/*
*****************************************************************************
*
*      GSM AMR-NB speech codec   R98   Version 7.6.0   December 12, 2001
*                                R99   Version 3.3.0                
*                                REL-4 Version 4.1.0                
*
*****************************************************************************
*
*      File             : d_plsf.c
*      Purpose          : common part (init, exit, reset) of LSF decoder
*                         module (rest in d_plsf_3.c and d_plsf_5.c)
*
*****************************************************************************
*/
 
 
/*
*****************************************************************************
*                         MODULE INCLUDE FILE AND VERSION ID
*****************************************************************************
*/
#include "namespace.h"
#include "d_plsf.h"
 
/*
*****************************************************************************
*                         INCLUDE FILES
*****************************************************************************
*/
#include "typedef.h"
#include "basic_op.h"
#include "no_count.h"
#include "cnst.h"
#include "memops.h"
#include "q_plsf5_tab.h"

/*
*--------------------------------------------------*
* Constants (defined in cnst.h)                    *
*--------------------------------------------------*
*  M                    : LPC order
*--------------------------------------------------*
*/
 
/*
*****************************************************************************
*                         PUBLIC PROGRAM CODE
*****************************************************************************
*/
 
/*
**************************************************************************
*
*  Function    : D_plsf_reset
*  Purpose     : Resets state memory
*
**************************************************************************
*/
void D_plsf_reset (D_plsfState *state)
{
  Word16 i;
  
  for (i = 0; i < M; i++){
      state->past_r_q[i] = 0;             /* Past quantized prediction error */
  }
  
  /* Past dequantized lsfs */
  Copy(mean_lsf, &state->past_lsf_q[0], M);
}