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 "wmc_auto.h"
      37             : #include <assert.h>
      38             : #include "prot_fx.h"
      39             : #include "ivas_prot_fx.h"
      40             : 
      41             : /*-------------------------------------------------------------------*
      42             :  *  splitAvailableBits()
      43             :  *
      44             :  *  split available bits between channels based on the split ratio
      45             :  *-------------------------------------------------------------------*/
      46             : 
      47      158327 : void splitAvailableBits_fx(
      48             :     const Word16 total_bits,      /* i  : total available bits for TCX coding   Q0*/
      49             :     const Word16 split_ratio,     /* i  : split ratio                           Q0*/
      50             :     const Word16 isSBAStereoMode, /* i  : signal core coding for SBA            Q0*/
      51             :     Word16 *bits_ch0,             /* o  : bits for channel 0                    Q0*/
      52             :     Word16 *bits_ch1              /* o  : bits for channel 1                    Q0*/
      53             : )
      54             : {
      55      158327 :     assert( split_ratio >= 1 && LT_16( split_ratio, SMDCT_BITRATE_RATIO_RANGE ) );
      56             : 
      57             :     /* *bits_ch0 = split_ratio * total_bits / SMDCT_BITRATE_RATIO_RANGE; */
      58      158327 :     *bits_ch0 = extract_l( L_shr( L_mult0( split_ratio, total_bits ), 3 ) ); /*Q0*/
      59      158327 :     move16();
      60             :     /* for SBA mode bias the distribution towards the W channel */
      61      158327 :     test();
      62      158327 :     IF( LT_16( split_ratio, 7 ) && isSBAStereoMode )
      63             :     {
      64       74086 :         *bits_ch0 = add( *bits_ch0, extract_l( Mpy_32_16_1( 6554 /* 0.2 in Q15 */, *bits_ch0 ) ) ); /*Q0*/
      65       74086 :         move16();
      66             :     }
      67      158327 :     *bits_ch1 = sub( total_bits, *bits_ch0 ); /*Q0*/
      68      158327 :     move16();
      69             : 
      70      158327 :     return;
      71             : }