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 "prot.h"
      43             : #include "wmc_auto.h"
      44             : 
      45             : /*------------------------------------------------------------------
      46             :  * weight_a()
      47             :  *
      48             :  * Weighting of LP filter coefficients, ap[i] = a[i] * (gamma^i)
      49             :  *------------------------------------------------------------------*/
      50             : 
      51    14572361 : void weight_a(
      52             :     const float *a,    /* i  : LP filter coefficients          */
      53             :     float *ap,         /* o  : weighted LP filter coefficients */
      54             :     const float gamma, /* i  : weighting factor                */
      55             :     const int16_t m    /* i  : order of LP filter              */
      56             : )
      57             : {
      58             :     float f;
      59             :     int16_t i;
      60             : 
      61    14572361 :     ap[0] = a[0];
      62    14572361 :     f = gamma;
      63             : 
      64   226333033 :     for ( i = 1; i <= m; i++ )
      65             :     {
      66   211760672 :         ap[i] = f * a[i];
      67   211760672 :         f *= gamma;
      68             :     }
      69             : 
      70    14572361 :     return;
      71             : }
      72             : 
      73             : 
      74             : /*------------------------------------------------------------------
      75             :  * weight_a_subfr()
      76             :  *
      77             :  * Weighting of LP filter coefficients for multiple subframes,
      78             :  * ap[i] = a[i] * (gamma^i)
      79             :  *------------------------------------------------------------------*/
      80             : 
      81     1320524 : void weight_a_subfr(
      82             :     const int16_t nb_subfr, /* i  : number of subframes             */
      83             :     const float *A,         /* i  : LP filter coefficients          */
      84             :     float *Aw,              /* o  : weighted LP filter coefficients */
      85             :     const float gamma,      /* i  : weighting factor                */
      86             :     const int16_t m         /* i  : order of LP filter              */
      87             : )
      88             : {
      89             :     int16_t i, j;
      90             :     float tmp;
      91             : 
      92     6769008 :     for ( j = 0; j < nb_subfr; j++ )
      93             :     {
      94     5448484 :         Aw[j * ( m + 1 )] = A[j * ( m + 1 )];
      95             :     }
      96             : 
      97             :     /* Smoothing aka spreading aka masking envelope generation */
      98     1320524 :     tmp = gamma;
      99    22448908 :     for ( i = 1; i < m + 1; i++ )
     100             :     {
     101   108304128 :         for ( j = 0; j < nb_subfr; j++ )
     102             :         {
     103    87175744 :             Aw[i + j * ( m + 1 )] = A[i + j * ( m + 1 )] * tmp;
     104             :         }
     105    21128384 :         tmp *= gamma;
     106             :     }
     107             : 
     108     1320524 :     return;
     109             : }