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             :  * dec_acelp_2t32()
      48             :  *
      49             :  * 12 bits algebraic codebook decoder.
      50             :  * 2 track x 32 positions per track = 64 samples.
      51             :  *
      52             :  * 12 bits --> 2 pulses in a frame of 64 samples.
      53             :  *
      54             :  * All pulses can have two (2) possible amplitudes: +1 or -1.
      55             :  * Each pulse can have 32 possible positions.
      56             :  *
      57             :  * See cod2t32.c for more details of the algebraic code.
      58             :  *----------------------------------------------------------------------------------*/
      59             : 
      60       70755 : void dec_acelp_2t32(
      61             :     Decoder_State *st, /* i/o: decoder state structure                 */
      62             :     float code[]       /* o  :   algebraic (fixed) codebook excitation */
      63             : )
      64             : {
      65             :     int16_t index, i0, i1;
      66             : 
      67       70755 :     index = get_next_indice( st, 12 );
      68             : 
      69       70755 :     set_f( code, 0.0f, L_SUBFR );
      70             : 
      71             :     /*-----------------------------------------------------------------*
      72             :      * decode the positions and signs of pulses and build the codeword
      73             :      *-----------------------------------------------------------------*/
      74             : 
      75       70755 :     i0 = ( ( index >> 6 ) & ( NB_POS_FCB_2T - 1 ) ) * NB_TRACK_FCB_2T;
      76       70755 :     i1 = ( ( index & ( NB_POS_FCB_2T - 1 ) ) * NB_TRACK_FCB_2T ) + 1;
      77       70755 :     code[i0] = -1.0f;
      78       70755 :     if ( ( index & 0x800 ) == 0 )
      79             :     {
      80       35370 :         code[i0] = 1.0f;
      81             :     }
      82             : 
      83       70755 :     code[i1] = -1.0f;
      84       70755 :     if ( ( index & 0x20 ) == 0 )
      85             :     {
      86       35793 :         code[i1] = 1.0f;
      87             :     }
      88             : 
      89       70755 :     return;
      90             : }
      91             : 
      92             : 
      93             : /*----------------------------------------------------------------------------------*
      94             :  * dec_acelp_1t64()
      95             :  *
      96             :  * 7 bits algebraic codebook.
      97             :  * 1 track x 64 positions per track = 64 samples.
      98             :  *
      99             :  * The pulse can have 64 possible positions and two (2) possible amplitudes: +1 or -1.
     100             :  *----------------------------------------------------------------------------------*/
     101             : 
     102        1056 : void dec_acelp_1t64(
     103             :     Decoder_State *st,    /* i/o: decoder state structure               */
     104             :     float code[],         /* o  : algebraic (fixed) codebook excitation */
     105             :     const int16_t L_subfr /* i  : subframe length                       */
     106             : )
     107             : {
     108             :     int16_t pos, sgn;
     109             : 
     110             :     /*-----------------------------------------------------------------*
     111             :      * decode the positions and signs of pulses and build the codeword
     112             :      *-----------------------------------------------------------------*/
     113             : 
     114        1056 :     if ( L_subfr == L_SUBFR )
     115             :     {
     116        1056 :         pos = get_next_indice( st, 7 );
     117             :     }
     118             :     else /* L_subfr == 2*L_SUBFR */
     119             :     {
     120           0 :         pos = get_next_indice( st, 8 );
     121             :     }
     122             : 
     123        1056 :     sgn = -1;
     124        1056 :     if ( pos >= L_subfr )
     125             :     {
     126         459 :         pos -= L_subfr;
     127         459 :         sgn = 1;
     128             :     }
     129             : 
     130        1056 :     set_f( code, 0.0f, L_subfr );
     131        1056 :     code[pos] = sgn;
     132             : 
     133        1056 :     return;
     134             : }