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             : /*------------------------------------------------------------------------
      47             :  * re8_cod()
      48             :  *
      49             :  * MULTI-RATE INDEXING OF A POINT y in THE LATTICE RE8 (INDEX COMPUTATION)
      50             :  *--------------------------------------------------------------------------*/
      51             : 
      52    24527951 : void re8_cod(
      53             :     int16_t x[], /* i  : point in RE8 (8-dimensional integer vector)                         */
      54             :     int16_t *n,  /* i  : codebook number (*n is an integer defined in {0,2,3,4,..,n_max})    */
      55             :     uint16_t *I, /* o  : index of c (pointer to unsigned 16-bit word)                        */
      56             :     int16_t k[]  /* o  : index of v (8-dimensional vector of binary indices) = Voronoi index */
      57             : )
      58             : {
      59             :     int16_t ka, c[8];
      60             : 
      61             :     /*----------------------------------------------------------------------
      62             :      * decompose x as x = 2^r c + v, where r is an integer >=0, c is an element
      63             :      *  of Q0, Q2, Q3 or Q4, and v is an element of a Voronoi code in RE8
      64             :      *  (if r=0, x=c)
      65             :      *  this decomposition produces as a side-product the index k[] of v
      66             :      *  and the identifier ka of the absolute leader related to c
      67             :      *
      68             :      *  the index of y is split into 2 parts :
      69             :      *  - the index I of c
      70             :      *  - the index k[] of v
      71             :      ----------------------------------------------------------------------*/
      72             : 
      73    24527951 :     re8_vor( x, n, k, c, &ka );
      74             : 
      75             :     /* safeguard in case that the AVQ subquantizer is not found - might happen for extremely strong onsets at the end of the frame */
      76    24527951 :     if ( ka >= NB_LEADER )
      77             :     {
      78     3348371 :         *n = 0;
      79     3348371 :         set_s( x, 0, 8 );
      80             :     }
      81             : 
      82             :     /* compute the index I (only if c is in Q2, Q3 or Q4) */
      83    24527951 :     if ( *n > 0 )
      84             :     {
      85    21179580 :         re8_compute_base_index( c, ka, I );
      86             :     }
      87             : 
      88    24527951 :     return;
      89             : }