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             : #include "prot.h"
      40             : #include "rom_enc.h"
      41             : #include "cnst.h"
      42             : #include "wmc_auto.h"
      43             : 
      44             : /*-------------------------------------------------------------------*
      45             :  * spec_center()
      46             :  *
      47             :  *
      48             :  *-------------------------------------------------------------------*/
      49             : 
      50        3100 : void spec_center(
      51             :     float spec_power[],    /* i  : energy of sub-band divided uniformly  */
      52             :     float sp_center[],     /* o  : spectral centroid                     */
      53             :     const int16_t bw_index /* i  : bandwidth                             */
      54             : )
      55             : {
      56             :     int16_t i;
      57             :     float t_sp_center, frame_power;
      58        3100 :     int16_t sp_center_band_num = SP_CENTER_BAND_NUM_TAB[bw_index];
      59             :     float sp_center_mem;
      60             : 
      61        3100 :     t_sp_center = 0;
      62        3100 :     frame_power = 0;
      63             : 
      64       74400 :     for ( i = 1; i < sp_center_band_num; i++ )
      65             :     {
      66       71300 :         t_sp_center += spec_power[i] * ( i );
      67       71300 :         frame_power += spec_power[i];
      68             :     }
      69        3100 :     sp_center[3] = (float) ( ( t_sp_center + VAD_DELTA1[bw_index] ) / ( frame_power + VAD_DELTA2[bw_index] ) );
      70             : 
      71        3100 :     sp_center_mem = 0;
      72        3100 :     frame_power = 0;
      73             : 
      74       34100 :     for ( i = 0; i < 10; i++ )
      75             :     {
      76       31000 :         sp_center_mem += spec_power[i] * ( i + 1 );
      77       31000 :         frame_power += spec_power[i];
      78             :     }
      79             : 
      80             :     /* 107374184.f = 32768.f * 32768.f * 0.1 */
      81        3100 :     t_sp_center = (float) ( ( sp_center_mem + 107374184.f ) / ( frame_power + 107374184.f ) );
      82             : 
      83        3100 :     sp_center[0] = 0.7f * sp_center[0] + 0.3f * t_sp_center;
      84        3100 :     sp_center[2] = t_sp_center;
      85             : 
      86        3100 :     if ( bw_index == CLDFBVAD_NB_ID )
      87             :     {
      88           0 :         t_sp_center = (float) ( ( sp_center_mem ) / ( frame_power + FLT_MIN ) );
      89           0 :         sp_center[0] = 0.7f * sp_center[0] + 0.3f * t_sp_center;
      90           0 :         sp_center[2] = t_sp_center;
      91             :     }
      92             : 
      93        3100 :     return;
      94             : }