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 "prot.h"
      43             : #include "wmc_auto.h"
      44             : 
      45             : /*-------------------------------------------------------------------*
      46             :  * interpolation()
      47             :  *
      48             :  * Fractional interpolation of signal at position (frac/resol)
      49             :  *-------------------------------------------------------------------*/
      50             : 
      51             : /*! r: interpolated value */
      52   547038950 : float interpolation(
      53             :     const float *x,        /* i  : input vector         */
      54             :     const float *win,      /* i  : interpolation window */
      55             :     const int16_t frac,    /* i  : fraction             */
      56             :     const int16_t up_samp, /* i  : upsampling factor    */
      57             :     const int16_t nb_coef  /* i  : nb of filter coef    */
      58             : )
      59             : {
      60             :     int16_t i;
      61             :     float s;
      62             :     const float *x1, *x2, *c1, *c2;
      63             : 
      64   547038950 :     x1 = &x[0];
      65   547038950 :     x2 = &x[1];
      66   547038950 :     c1 = &win[frac];
      67   547038950 :     c2 = &win[up_samp - frac];
      68   547038950 :     s = 0.0f;
      69             : 
      70 22450192073 :     for ( i = 0; i < nb_coef; i++ )
      71             :     {
      72 21903153123 :         s += ( *x1-- ) * ( *c1 ) + ( *x2++ ) * ( *c2 );
      73             : #define WMC_TOOL_SKIP
      74 21903153123 :         c1 += up_samp;
      75 21903153123 :         c2 += up_samp;
      76             : #undef WMC_TOOL_SKIP
      77             :     }
      78             : 
      79   547038950 :     return s;
      80             : }