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 "cnst.h"
      43             : #include "prot.h"
      44             : #include "wmc_auto.h"
      45             : 
      46             : /*-------------------------------------------------------------------*
      47             :  * find_wsp()
      48             :  *
      49             :  * Compute weighted speech used in open-loop pitch search
      50             :  *-------------------------------------------------------------------*/
      51             : 
      52     1318689 : void find_wsp(
      53             :     const int16_t L_frame,  /* i  : length of the frame                   */
      54             :     const int16_t L_subfr,  /* i  : length of subframe                    */
      55             :     const int16_t nb_subfr, /* i  : number of subframes                   */
      56             :     const float *A,         /* i  : A(z) filter coefficients              */
      57             :     float *Aw,              /* o  : weighted A(z) filter coefficients     */
      58             :     const float *speech,    /* i  : pointer to the denoised speech frame  */
      59             :     const float tilt_fact,  /* i  : tilt factor                           */
      60             :     float *wsp,             /* o  : poitnter to the weighted speech frame */
      61             :     float *mem_wsp,         /* i/o: W(Z) denominator memory               */
      62             :     const float gamma,      /* i  : weighting factor                      */
      63             :     const int16_t L_look    /* i  : look-ahead                            */
      64             : )
      65             : {
      66             :     float *p_Aw, tmp;
      67             :     int16_t i_subfr;
      68             : 
      69             : 
      70             :     /*-----------------------------------------------------------------*
      71             :      *  Compute weighted A(z) unquantized for subframes
      72             :      *-----------------------------------------------------------------*/
      73             : 
      74     1318689 :     weight_a_subfr( nb_subfr, A, Aw, gamma, M );
      75             : 
      76             :     /*-----------------------------------------------------------------*
      77             :      *  Compute weighted speech for all subframes
      78             :      *-----------------------------------------------------------------*/
      79             : 
      80     1318689 :     p_Aw = Aw;
      81     6758300 :     for ( i_subfr = 0; i_subfr < L_frame; i_subfr += L_subfr )
      82             :     {
      83     5439611 :         residu( p_Aw, M, &speech[i_subfr], &wsp[i_subfr], L_subfr );
      84     5439611 :         p_Aw += ( M + 1 );
      85             :     }
      86     1318689 :     p_Aw -= ( M + 1 );
      87             : 
      88             :     /*-----------------------------------------------------------------*
      89             :      *  Weighted speech computation is extended on look-ahead
      90             :      *-----------------------------------------------------------------*/
      91             : 
      92     1318689 :     deemph( wsp, tilt_fact, L_frame, mem_wsp );
      93     1318689 :     residu( p_Aw, M, &speech[L_frame], &wsp[L_frame], L_look );
      94     1318689 :     tmp = *mem_wsp;
      95     1318689 :     deemph( &wsp[L_frame], tilt_fact, L_look, &tmp );
      96             : 
      97     1318689 :     return;
      98             : }