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             :  * frame_spec_dif_cor_rate()
      45             :  *
      46             :  *
      47             :  *-------------------------------------------------------------------*/
      48             : 
      49        3100 : void frame_spec_dif_cor_rate(
      50             :     float spec_amp[],         /* i  : spectral amplitude        */
      51             :     float pre_spec_low_dif[], /* i/o: low spectrum different    */
      52             :     float f_tonality_rate[]   /* o  : tonality rate             */
      53             : )
      54             : {
      55             :     int16_t i;
      56             :     float spec_low_dif[59];
      57             :     float tmp, spec_low_dif_cor_rate, spec_dif_cor_rate;
      58             :     float m, dx, dy;
      59             : 
      60             : 
      61      176700 :     for ( i = 0; i < PRE_SPEC_DIF_NUM; i++ )
      62             :     {
      63      173600 :         tmp = spec_amp[i + 6] - spec_amp[i + 5];
      64      173600 :         if ( tmp < 0 )
      65             :         {
      66       94061 :             spec_low_dif[i] = 0;
      67             :         }
      68             :         else
      69             :         {
      70       79539 :             spec_low_dif[i] = tmp;
      71             :         }
      72             :     }
      73        3100 :     m = 0;
      74        3100 :     dx = 0;
      75        3100 :     dy = 0;
      76      176700 :     for ( i = 0; i < PRE_SPEC_DIF_NUM; i++ )
      77             :     {
      78      173600 :         m += spec_low_dif[i] * pre_spec_low_dif[i];
      79      173600 :         dx += spec_low_dif[i] * spec_low_dif[i];
      80      173600 :         dy += pre_spec_low_dif[i] * pre_spec_low_dif[i];
      81             :     }
      82             : 
      83             :     /* 1073741.824 = 0.001 * 32768 * 32768 */
      84        3100 :     spec_low_dif_cor_rate = (float) ( m / sqrt( ( dx * dy + 1073741.824f ) ) );
      85        3100 :     spec_dif_cor_rate = spec_low_dif_cor_rate;
      86        3100 :     f_tonality_rate[0] = spec_dif_cor_rate;
      87        3100 :     f_tonality_rate[1] = f_tonality_rate[1] * 0.96f + spec_dif_cor_rate * 0.04f;
      88        3100 :     f_tonality_rate[2] = f_tonality_rate[2] * 0.90f + spec_dif_cor_rate * 0.1f;
      89             : 
      90      176700 :     for ( i = 0; i < PRE_SPEC_DIF_NUM; i++ )
      91             :     {
      92      173600 :         pre_spec_low_dif[i] = spec_low_dif[i];
      93             :     }
      94             : 
      95        3100 :     return;
      96             : }