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 "rom_com.h"
      44             : #include "prot.h"
      45             : #include "wmc_auto.h"
      46             : 
      47             : /*-------------------------------------------------------------------*
      48             :  * rc_get_bits2()
      49             :  *
      50             :  *  Get number of bits needed to finalize range coder
      51             :  *-------------------------------------------------------------------*/
      52             : 
      53             : /*! r: Number of bits needed */
      54      525415 : int16_t rc_get_bits2(
      55             :     const int16_t N,     /* i  : Number of bits currently used */
      56             :     const uint32_t range /* i  : Range of range coder          */
      57             : )
      58             : {
      59             :     int16_t tmp;
      60      525415 :     tmp = N + 2 + norm_ul( range ); /* aligned to BASOP */
      61      525415 :     return tmp;
      62             : }
      63             : 
      64             : /*-------------------------------------------------------------------*
      65             :  * rangeCoderFinalizationFBits()
      66             :  *
      67             :  * Fractional (Q3) bits for range coder finalization
      68             :  *-------------------------------------------------------------------*/
      69             : 
      70     1433058 : void rangeCoderFinalizationFBits(
      71             :     const int16_t Brc,    /*  i  : Current number of decoded bits */
      72             :     const uint32_t INTrc, /*  i  : Range coder state              */
      73             :     int16_t *FBits        /*  i  : Fractional finalization bits   */
      74             : )
      75             : {
      76             :     uint32_t Bq15;
      77             :     uint32_t UL_tmp;
      78             :     uint16_t Bq15ui16, B, E;
      79             :     int16_t k;
      80             : 
      81     1433058 :     B = 30 - norm_ul( INTrc ); /* aligned to BASOP */
      82             : 
      83             : #define RCF_INIT_SHIFTp1   ( RCF_INIT_SHIFT + 1 )
      84             : #define RCF_FINALIZE_LIMIT ( ( 1L << 16 ) - 1 )
      85     1433058 :     *FBits = ( Brc + 32 ) * 8;
      86             : 
      87     1433058 :     Bq15 = 0;
      88     1433058 :     k = B - RCF_INIT_SHIFT;
      89     1433058 :     if ( k >= 0 )
      90             :     {
      91     1433058 :         Bq15 = INTrc >> ( k ); /* single op */
      92             :     }
      93             : 
      94     1433058 :     E = 2;
      95     5732232 :     for ( k = 1; k < 4; k++ )
      96             :     {
      97     4299174 :         Bq15ui16 = (uint16_t) ( Bq15 >> ( E & 1 ) );
      98     4299174 :         UL_tmp = (uint32_t) Bq15ui16;
      99     4299174 :         Bq15 = ( UL_tmp * Bq15ui16 ) >> RCF_INIT_SHIFTp1;
     100     4299174 :         E = 2 * B;
     101     4299174 :         if ( Bq15 > RCF_FINALIZE_LIMIT )
     102             :         {
     103     2793473 :             E++;
     104             :         }
     105     4299174 :         B = E;
     106             :     }
     107     1433058 :     *FBits -= B;
     108             : #undef RCF_INIT_SHIFTp1
     109             : #undef RCF_FINALIZE_LIMIT
     110             : 
     111     1433058 :     return;
     112             : }