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 <math.h>
      40             : #include "prot.h"
      41             : #include "wmc_auto.h"
      42             : 
      43             : /*-------------------------------------------------------------------*
      44             :  * ltd_stable()
      45             :  *
      46             :  *
      47             :  *-------------------------------------------------------------------*/
      48             : 
      49        3100 : void ltd_stable(
      50             :     float frames_power[],     /* i/o: energy of several frames    */
      51             :     float ltd_stable_rate[],  /* o  : time-domain stable rate     */
      52             :     const float frame_energy, /* i  : current frame energy        */
      53             :     const int16_t frameloop   /* i  : number of  frames           */
      54             : )
      55             : {
      56             :     int16_t i;
      57             :     float tmp;
      58             :     float mid_frame_amp[28];
      59             :     float seg_amp;
      60             :     float dif, apow;
      61             : 
      62        3100 :     frames_power[0] = (float) ( sqrt( frame_energy ) + 0.001 );
      63             : 
      64        3100 :     if ( frameloop < 3 )
      65             :     {
      66         504 :         for ( i = 1; i < POWER_NUM; i++ )
      67             :         {
      68         495 :             frames_power[i] = frames_power[0];
      69             :         }
      70             :     }
      71             : 
      72       65100 :     for ( i = 0; i < 20; i++ )
      73             :     {
      74       62000 :         mid_frame_amp[i] = frames_power[2 * i] + frames_power[2 * i + 1];
      75             :     }
      76        3100 :     seg_amp = 0;
      77       65100 :     for ( i = 0; i < 20; i++ )
      78             :     {
      79       62000 :         seg_amp += mid_frame_amp[i];
      80             :     }
      81        3100 :     seg_amp = seg_amp / 20;
      82        3100 :     dif = 0;
      83        3100 :     apow = 0;
      84       65100 :     for ( i = 0; i < 20; i++ )
      85             :     {
      86       62000 :         tmp = mid_frame_amp[i] - seg_amp;
      87       62000 :         dif += tmp * tmp;
      88       62000 :         apow += mid_frame_amp[i] * mid_frame_amp[i];
      89             :     }
      90        3100 :     tmp = dif / ( apow + 0.0001f );
      91        3100 :     ltd_stable_rate[0] = dif / ( apow + FLT_MIN );
      92             : 
      93             : 
      94        3100 :     seg_amp = 0;
      95       46500 :     for ( i = 0; i < 14; i++ )
      96             :     {
      97       43400 :         seg_amp += mid_frame_amp[i];
      98             :     }
      99        3100 :     seg_amp = seg_amp / 14;
     100        3100 :     dif = 0;
     101        3100 :     apow = 0;
     102       46500 :     for ( i = 0; i < 14; i++ )
     103             :     {
     104       43400 :         tmp = mid_frame_amp[i] - seg_amp;
     105       43400 :         dif += tmp * tmp;
     106       43400 :         apow += mid_frame_amp[i] * mid_frame_amp[i];
     107             :     }
     108        3100 :     ltd_stable_rate[1] = dif / ( apow + 0.0001f );
     109             : 
     110        3100 :     seg_amp = 0;
     111       27900 :     for ( i = 0; i < 8; i++ )
     112             :     {
     113       24800 :         seg_amp += mid_frame_amp[i];
     114             :     }
     115        3100 :     seg_amp = seg_amp / 8;
     116        3100 :     dif = 0;
     117        3100 :     apow = 0;
     118       27900 :     for ( i = 0; i < 8; i++ )
     119             :     {
     120       24800 :         tmp = mid_frame_amp[i] - seg_amp;
     121       24800 :         dif += tmp * tmp;
     122       24800 :         apow += mid_frame_amp[i] * mid_frame_amp[i];
     123             :     }
     124        3100 :     ltd_stable_rate[2] = (float) ( dif / ( apow + 0.0001f ) );
     125        3100 :     ltd_stable_rate[3] = 0.90f * ltd_stable_rate[3] + 0.1f * ltd_stable_rate[2];
     126             : 
     127      173600 :     for ( i = POWER_NUM - 1; i > 0; i-- )
     128             :     {
     129      170500 :         frames_power[i] = frames_power[i - 1];
     130             :     }
     131             : 
     132        3100 :     return;
     133             : }