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 <assert.h>
      38             : #include <stdint.h>
      39             : #include "options.h"
      40             : #include <math.h>
      41             : #include "cnst.h"
      42             : #include "prot.h"
      43             : #include "wmc_auto.h"
      44             : 
      45             : /*------------------------------------------------------------------*
      46             :  * lsf_weight_2st()
      47             :  *
      48             :  *
      49             :  *------------------------------------------------------------------*/
      50             : 
      51      540808 : void lsf_weight_2st(
      52             :     const float *lsfq,
      53             :     float *w,
      54             :     const int16_t mode,
      55             :     const int32_t sr_core )
      56             : {
      57             :     int16_t i;
      58             :     float d[M + 1];
      59      540808 :     float freq_max = sr_core / 2.f;
      60      540808 :     float freq_div = freq_max / (float) M;
      61             : 
      62             :     /* compute lsf distance */
      63      540808 :     d[0] = lsfq[0];
      64     8652928 :     for ( i = 1; i < M; i++ )
      65             :     {
      66     8112120 :         d[i] = lsfq[i] - lsfq[i - 1];
      67             :     }
      68      540808 :     d[M] = freq_max - lsfq[M - 1];
      69             : 
      70             :     /* weighting function */
      71     9193736 :     for ( i = 0; i < M; i++ )
      72             :     {
      73     8652928 :         assert( d[i] > 0 );
      74             : 
      75     8652928 :         if ( mode == 0 )
      76             :         {
      77     6799184 :             w[i] = (float) ( 60.0f / ( freq_div / sqrt( d[i] * d[i + 1] ) ) ); /* abs */
      78             :         }
      79     1853744 :         else if ( mode == 1 )
      80             :         {
      81     1776832 :             w[i] = (float) ( 65.0f / ( freq_div / sqrt( d[i] * d[i + 1] ) ) ); /* mid */
      82             :         }
      83             :         else
      84             :         {
      85       76912 :             w[i] = (float) ( 63.0f / ( freq_div / sqrt( d[i] * d[i + 1] ) ) ); /* rel2 */
      86             :         }
      87             :     }
      88             : 
      89      540808 :     return;
      90             : }