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_rom_com.h"
      37             : #include "ivas_stat_dec.h"
      38             : #include "wmc_auto.h"
      39             : #include "prot_fx.h"
      40             : #include "ivas_rom_com_fx.h"
      41             : #include "ivas_prot_fx.h"
      42             : 
      43             : 
      44             : /*-------------------------------------------------------------------*
      45             :  * deindex_elevation()
      46             :  *
      47             :  * Decode elevation index
      48             :  *----------------------------------------------------------------------*/
      49             : 
      50             : /*! r: decoded elevation value */
      51             : 
      52     1621497 : Word32 deindex_elevation_fx(
      53             :     UWord16 *id_th,             /* i  : input index                             Q0*/
      54             :     const Word16 no_bits,       /* i  : number of bits for the spherical grid   Q0*/
      55             :     const MC_LS_SETUP mc_format /* i  : channel format if in MC-mode            */
      56             : )
      57             : {
      58             :     Word32 theta_hat_fx;
      59     1621497 :     Word16 q_id_th = sub( norm_l( *id_th ), 1 );
      60     1621497 :     Word32 id_th_fx = L_shl( *id_th, q_id_th ); /*q_id_th*/
      61             : 
      62     1621497 :     IF( EQ_32( *id_th, MASA_NO_INDEX ) )
      63             :     {
      64           0 :         theta_hat_fx = 0;
      65           0 :         move32();
      66             :     }
      67             :     ELSE
      68             :     {
      69     1621497 :         IF( NE_32( mc_format, MC_LS_SETUP_INVALID ) )
      70             :         {
      71       42668 :             theta_hat_fx = L_shl( Mpy_32_32( id_th_fx, delta_theta_masa_fx[( no_bits - 3 )] ), sub( 31, q_id_th ) ); /*Q22*/
      72       42668 :             IF( GT_32( theta_hat_fx, L_shl( 90, Q22 ) ) )
      73             :             {
      74          63 :                 theta_hat_fx = 90 * ONE_IN_Q22;
      75          63 :                 move32();
      76             :             }
      77             :         }
      78             :         ELSE
      79             :         {
      80     1578829 :             IF( L_and( *id_th, 1 ) == 0 )
      81             :             {
      82             :                 /* theta is negative */
      83     1308711 :                 *id_th = (UWord16) L_shr( *id_th, 1 ); /* *id_th / 2 */ /*Q0*/
      84     1308711 :                 move16();
      85     1308711 :                 id_th_fx = L_shr( id_th_fx, 1 );                                                                                     /*q_id_th*/
      86     1308711 :                 theta_hat_fx = L_negate( L_shl( Mpy_32_32( id_th_fx, delta_theta_masa_fx[( no_bits - 3 )] ), sub( 31, q_id_th ) ) ); /*Q22*/
      87     1308711 :                 IF( LT_32( theta_hat_fx, -90 * ONE_IN_Q22 ) )
      88             :                 {
      89         251 :                     theta_hat_fx = -90 * ONE_IN_Q22;
      90         251 :                     move32();
      91             :                 }
      92             :             }
      93             :             ELSE
      94             :             {
      95      270118 :                 *id_th = (UWord16) L_shr( L_add( *id_th, 1 ), 1 ); /* ( *id_th + 1 ) / 2 */ /*Q0*/
      96      270118 :                 move16();
      97      270118 :                 id_th_fx = L_shr( L_add( id_th_fx, L_shl( 1, q_id_th ) ), 1 );                                           /*q_id_th*/
      98      270118 :                 theta_hat_fx = L_shl( Mpy_32_32( id_th_fx, delta_theta_masa_fx[( no_bits - 3 )] ), sub( 31, q_id_th ) ); /*Q22*/
      99      270118 :                 IF( GT_32( theta_hat_fx, 90 * ONE_IN_Q22 ) )
     100             :                 {
     101          74 :                     theta_hat_fx = 90 * ONE_IN_Q22;
     102          74 :                     move32();
     103             :                 }
     104             :             }
     105             :         }
     106             :     }
     107             : 
     108     1621497 :     return theta_hat_fx; /*Q22*/
     109             : }