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 "prot.h"
      40             : #include "wmc_auto.h"
      41             : 
      42             : /*------------------------------------------------------------------*
      43             :  * vlpc_2st_dec()
      44             :  *
      45             :  *
      46             :  *------------------------------------------------------------------*/
      47             : 
      48      322011 : void vlpc_2st_dec(
      49             :     float *lsfq,          /* i/o: i:1st stage   o:1st+2nd stage   */
      50             :     int16_t *indx,        /* i  : index[] (4 bits per words)      */
      51             :     const int16_t mode,   /* i  : 0=abs, >0=rel                   */
      52             :     const int32_t sr_core /* i  : internal sampling rate          */
      53             : )
      54             : {
      55             :     int16_t i;
      56             :     float w[M];
      57             :     int16_t xq[M];
      58      322011 :     float scale = ( (float) sr_core ) / INT_FS_12k8;
      59             : 
      60             :     /* weighting from the 1st stage */
      61      322011 :     lsf_weight_2st( lsfq, w, mode, sr_core );
      62             : 
      63             :     /* quantize */
      64      322011 :     AVQ_dec_lpc( indx, xq, 2 );
      65             : 
      66             :     /* quantized lsf */
      67     5474187 :     for ( i = 0; i < M; i++ )
      68             :     {
      69     5152176 :         lsfq[i] += scale * ( w[i] * (float) xq[i] );
      70             :     }
      71             : 
      72             :     /* reorder */
      73      322011 :     v_sort( lsfq, 0, M - 1 );
      74      322011 :     reorder_lsf( lsfq, LSF_GAP, M, sr_core );
      75             : 
      76      322011 :     return;
      77             : }