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 "wmc_auto.h"
      45             : 
      46             : /*---------------------------------------------------------------------*
      47             :  * lp_filt_exc_dec()
      48             :  *
      49             :  * Low-pass filtering of the adaptive exctitation
      50             :  *---------------------------------------------------------------------*/
      51             : 
      52     1659222 : void lp_filt_exc_dec(
      53             :     Decoder_State *st,        /* i/o: decoder state structure                 */
      54             :     const int16_t codec_mode, /* i  : codec mode                              */
      55             :     const int16_t i_subfr,    /* i  : subframe index                          */
      56             :     const int16_t L_subfr,    /* i  : subframe size                           */
      57             :     const int16_t L_frame,    /* i  : frame size                              */
      58             :     int16_t lp_flag,          /* i  : operation mode signaling                */
      59             :     float *exc                /* i/o: pointer to the excitation signal frame  */
      60             : )
      61             : {
      62             :     int16_t i;
      63             :     float code[L_FRAME];
      64             : 
      65             :     /*-----------------------------------------------------------------*
      66             :      * Select LP filtering of the adaptive excitation
      67             :      *-----------------------------------------------------------------*/
      68             : 
      69     1659222 :     if ( codec_mode == MODE1 )
      70             :     {
      71     1650162 :         if ( lp_flag == NORMAL_OPERATION )
      72             :         {
      73     1450446 :             lp_flag = get_next_indice( st, 1 );
      74             :         }
      75             :     }
      76             : 
      77             :     /*--------------------------------------------------------------------*
      78             :      * Find pitch excitation with LP filter
      79             :      *--------------------------------------------------------------------*/
      80             : 
      81     1659222 :     if ( lp_flag == LOW_PASS )
      82             :     {
      83             :         /* pointer positionning to avoid doing it inside the loop */
      84     1092108 :         if ( codec_mode == MODE2 && L_frame == L_FRAME16k )
      85             :         {
      86      509145 :             for ( i = 0; i < L_subfr; i++ )
      87             :             {
      88      501312 :                 code[i] = (float) ( 0.21f * exc[i - 1 + i_subfr] + 0.58f * exc[i + i_subfr] + 0.21f * exc[i + 1 + i_subfr] );
      89             :             }
      90             :         }
      91             :         else
      92             :         {
      93    70477875 :             for ( i = 0; i < L_subfr; i++ )
      94             :             {
      95    69393600 :                 code[i] = (float) ( 0.18f * exc[i - 1 + i_subfr] + 0.64f * exc[i + i_subfr] + 0.18f * exc[i + 1 + i_subfr] );
      96             :             }
      97             :         }
      98             : 
      99     1092108 :         mvr2r( code, &exc[i_subfr], L_subfr );
     100             :     }
     101             : 
     102     1659222 :     return;
     103             : }