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 <math.h>
      43             : #include "cnst.h"
      44             : #include "rom_com.h"
      45             : #include "prot.h"
      46             : #include "wmc_auto.h"
      47             : 
      48             : /*--------------------------------------------------------------------------*
      49             :  * noise_adjust()
      50             :  *
      51             :  * Calculate attenuation
      52             :  *--------------------------------------------------------------------------*/
      53             : 
      54             : /*! r: index of noise attenuation */
      55        6059 : int16_t noise_adjust(
      56             :     const float *coeffs_norm, /* i  : normalized coefficients    */
      57             :     const int16_t *bitalloc,  /* i  : bit allocation             */
      58             :     const int16_t *sfm_start,
      59             :     const int16_t *sfm_end,
      60             :     const int16_t core_sfm /* i  : index of the end band for core  */
      61             : )
      62             : {
      63             :     int16_t nf_idx, sfm, bin, num_coeffs;
      64             :     int16_t E, diff, tmp;
      65             : 
      66        6059 :     E = 0;
      67        6059 :     num_coeffs = 0;
      68             : 
      69      176850 :     for ( sfm = 0; sfm <= core_sfm; sfm++ )
      70             :     {
      71      170791 :         if ( bitalloc[sfm] == 0 )
      72             :         {
      73      596363 :             for ( bin = sfm_start[sfm]; bin < sfm_end[sfm]; bin++ )
      74             :             {
      75      556856 :                 if ( coeffs_norm[bin] == 0 )
      76             :                 {
      77           0 :                     E = E - 1;
      78             :                 }
      79             :                 else
      80             :                 {
      81      556856 :                     tmp = (int16_t) ( floor( log10( fabs( coeffs_norm[bin] * L_FRAME ) ) / 0.301030f ) + 1 );
      82      556856 :                     if ( tmp < 0 )
      83             :                     {
      84        1088 :                         tmp = 0;
      85             :                     }
      86      556856 :                     E = E + tmp;
      87             :                 }
      88             : 
      89      556856 :                 num_coeffs = num_coeffs + 1;
      90             :             }
      91             :         }
      92             :     }
      93             : 
      94        6059 :     if ( num_coeffs != 0 )
      95             :     {
      96        5088 :         E = E / num_coeffs;
      97             :     }
      98             :     else
      99             :     {
     100         971 :         E = 0;
     101             :     }
     102             : 
     103        6059 :     diff = 7 - E;
     104             : 
     105        6059 :     if ( diff >= 0 )
     106             :     {
     107        5968 :         nf_idx = (int16_t) diff;
     108        5968 :         if ( diff > 3 )
     109             :         {
     110         971 :             nf_idx = 3;
     111             :         }
     112             :     }
     113             :     else
     114             :     {
     115          91 :         nf_idx = 0;
     116             :     }
     117             : 
     118        6059 :     return nf_idx;
     119             : }