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             :  * SFM_Cal()
      45             :  *
      46             :  *
      47             :  *--------------------------------------------------------------------*/
      48             : 
      49       23896 : float SFM_Cal(
      50             :     const float fcoef[],
      51             :     const int16_t n )
      52             : {
      53             :     int16_t i, k;
      54       23896 :     double geoMean = 0, arithMean = 0, SFM;
      55       23896 :     double tmp[4] = { 1, 1, 1, 1 };
      56             : 
      57      119480 :     for ( k = 0; k < 4; k++ )
      58             :     {
      59             : 
      60     4854304 :         for ( i = k * ( n >> 2 ); i < ( k + 1 ) * ( n >> 2 ); i++ )
      61             :         {
      62     4758720 :             tmp[k] *= ( fabs( fcoef[i] ) + EPSILON );
      63     4758720 :             arithMean += fabs( fcoef[i] );
      64             :         }
      65             :     }
      66       23896 :     geoMean = log( tmp[0] ) + log( tmp[1] ) + log( tmp[2] ) + log( tmp[3] );
      67       23896 :     geoMean = geoMean / n;
      68       23896 :     geoMean = exp( geoMean );
      69       23896 :     arithMean /= n;
      70       23896 :     SFM = ( geoMean + EPSILON ) / ( arithMean + EPSILON );
      71             : 
      72       23896 :     return (float) SFM;
      73             : }