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             : #include <stdint.h>
      34             : #include "options.h"
      35             : #include "ivas_cnst.h"
      36             : #include "ivas_prot.h"
      37             : #include "prot.h"
      38             : #include "wmc_auto.h"
      39             : 
      40             : /*--------------------------------------------------------------------------*
      41             :  * ivas_mdct_tcx10_bit_distribution()
      42             :  *
      43             :  *
      44             :  *--------------------------------------------------------------------------*/
      45             : 
      46       58320 : void ivas_mdct_tcx10_bit_distribution(
      47             :     int16_t target_bitsTCX10[NB_DIV],   /* o  : target bit distribution */
      48             :     const int16_t nbits_tcx,            /* i  : TCX bits                */
      49             :     const int16_t nTnsBitsTCX10[NB_DIV] /* i  : TNS bits                */
      50             : )
      51             : {
      52             :     int16_t k;
      53       58320 :     int16_t min_required_bits = NBITS_TCX_GAIN + NOISE_FILL_RANGES * NBITS_NOISE_FILL_LEVEL + SMDCT_MINIMUM_ARITH_BITS;
      54             : 
      55      174960 :     for ( k = 0; k < 2; k++ )
      56             :     {
      57      116640 :         if ( nbits_tcx & 1 )
      58             :         {
      59       59244 :             target_bitsTCX10[k] = nbits_tcx / 2 + ( k == 0 ? 1 : 0 ) - nTnsBitsTCX10[k];
      60             :         }
      61             :         else
      62             :         {
      63       57396 :             target_bitsTCX10[k] = nbits_tcx / 2 - nTnsBitsTCX10[k];
      64             :         }
      65             :     }
      66             : 
      67       58320 :     if ( target_bitsTCX10[0] < min_required_bits )
      68             :     {
      69             :         /*redistribute bits*/
      70           0 :         target_bitsTCX10[1] -= ( min_required_bits - target_bitsTCX10[0] );
      71           0 :         target_bitsTCX10[0] = min_required_bits;
      72             :     }
      73       58320 :     else if ( target_bitsTCX10[1] < min_required_bits )
      74             :     {
      75             :         /*redistribute bits*/
      76           0 :         target_bitsTCX10[0] -= ( min_required_bits - target_bitsTCX10[1] );
      77           0 :         target_bitsTCX10[1] = min_required_bits;
      78             :     }
      79             : 
      80       58320 :     return;
      81             : }