Line data    Source code

       1             : /******************************************************************************************************
       2             : 
       3             :    (C) 2022-2025 IVAS codec Public Collaboration with portions copyright Dolby International AB, Ericsson AB,
       4             :    Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
       5             :    Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
       6             :    Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
       7             :    contributors to this repository. All Rights Reserved.
       8             : 
       9             :    This software is protected by copyright law and by international treaties.
      10             :    The IVAS codec Public Collaboration consisting of Dolby International AB, Ericsson AB,
      11             :    Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
      12             :    Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
      13             :    Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
      14             :    contributors to this repository retain full ownership rights in their respective contributions in
      15             :    the software. This notice grants no license of any kind, including but not limited to patent
      16             :    license, nor is any license granted by implication, estoppel or otherwise.
      17             : 
      18             :    Contributors are required to enter into the IVAS codec Public Collaboration agreement before making
      19             :    contributions.
      20             : 
      21             :    This software is provided "AS IS", without any express or implied warranties. The software is in the
      22             :    development stage. It is intended exclusively for experts who have experience with such software and
      23             :    solely for the purpose of inspection. All implied warranties of non-infringement, merchantability
      24             :    and fitness for a particular purpose are hereby disclaimed and excluded.
      25             : 
      26             :    Any dispute, controversy or claim arising under or in relation to providing this software shall be
      27             :    submitted to and settled by the final, binding jurisdiction of the courts of Munich, Germany in
      28             :    accordance with the laws of the Federal Republic of Germany excluding its conflict of law rules and
      29             :    the United Nations Convention on Contracts on the International Sales of Goods.
      30             : 
      31             : *******************************************************************************************************/
      32             : 
      33             : /*====================================================================================
      34             :     EVS Codec 3GPP TS26.443 Nov 04, 2021. Version 12.14.0 / 13.10.0 / 14.6.0 / 15.4.0 / 16.3.0
      35             :   ====================================================================================*/
      36             : 
      37             : #include <stdint.h>
      38             : #include "options.h"
      39             : #ifdef DEBUGGING
      40             : #include "debug.h"
      41             : #endif
      42             : #include "cnst.h"
      43             : #include "prot.h"
      44             : #include "rom_com.h"
      45             : #include "wmc_auto.h"
      46             : 
      47             : /*--------------------------------------------------------------------*
      48             :  * residu()
      49             :  *
      50             :  * Compute the LP residual by filtering the input speech through A(z)
      51             :  *--------------------------------------------------------------------*/
      52             : 
      53    16381538 : void residu(
      54             :     const float *a,  /* i  : LP filter coefficients           */
      55             :     const int16_t m, /* i  : order of LP filter               */
      56             :     const float *x,  /* i  : input signal (usually speech)    */
      57             :     float *y,        /* o  : output signal (usually residual) */
      58             :     const int16_t l  /* i  : size of filtering                */
      59             : )
      60             : {
      61             :     float s;
      62             :     int16_t i, j;
      63             : 
      64  1325534059 :     for ( i = 0; i < l; i++ )
      65             :     {
      66  1309152521 :         s = x[i];
      67 21341966617 :         for ( j = 1; j <= m; j++ )
      68             :         {
      69 20032814096 :             s += a[j] * x[i - j];
      70             :         }
      71  1309152521 :         y[i] = s;
      72             :     }
      73             : 
      74    16381538 :     return;
      75             : }
      76             : 
      77             : /*--------------------------------------------------------------------*
      78             :  * calc_residu()
      79             :  *
      80             :  * Compute the LP residual by filtering the input through A(z) in all subframes
      81             :  *--------------------------------------------------------------------*/
      82             : 
      83      158402 : void calc_residu(
      84             :     const float *speech,  /* i  : weighted speech signal                    */
      85             :     float *res,           /* o  : residual signal                           */
      86             :     const float *p_Aq,    /* i  : quantized LP filter coefficients          */
      87             :     const int16_t L_frame /* i  : size of frame                             */
      88             : )
      89             : {
      90             :     int16_t i_subfr;
      91             : 
      92      866808 :     for ( i_subfr = 0; i_subfr < L_frame; i_subfr += L_SUBFR )
      93             :     {
      94             :         /* calculate the residual signal */
      95      708406 :         residu( p_Aq, M, &speech[i_subfr], &res[i_subfr], L_SUBFR );
      96             : 
      97             :         /* next subframe */
      98      708406 :         p_Aq += ( M + 1 );
      99             :     }
     100             : 
     101      158402 :     return;
     102             : }