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 "math.h"
      35             : #include "options.h"
      36             : #include "ivas_stat_com.h"
      37             : #include "prot_fx.h"
      38             : #include "rom_com.h"
      39             : #include "ivas_rom_com.h"
      40             : #include "cnst.h"
      41             : #include <assert.h>
      42             : #include "wmc_auto.h"
      43             : #include "ivas_prot_fx.h"
      44             : 
      45             : 
      46             : /*-----------------------------------------------------------------------------------------*
      47             :  * Function ivas_lfe_lpf_select_filt_coeff()
      48             :  *
      49             :  * Selects LFE filter coeff based on config.
      50             :  *-----------------------------------------------------------------------------------------*/
      51             : 
      52          90 : void ivas_lfe_lpf_select_filt_coeff_fx(
      53             :     const Word32 sampling_rate,     /* i  : sampling rate                       */
      54             :     const Word16 order,             /* i  : filter order                        */
      55             :     const Word32 **ppFilt_coeff_fx, /* o  : filter coefficients                 */
      56             :     const Word16 **ppFilt_coeff_e   /* o  : exponents of filter coefficients    */
      57             : )
      58             : {
      59          90 :     SWITCH( order )
      60             :     {
      61             : 
      62          90 :         case IVAS_FILTER_ORDER_4:
      63             :             SWITCH( sampling_rate )
      64             :             {
      65           0 :                 case 16000:
      66           0 :                     *ppFilt_coeff_fx = ivas_lpf_4_butter_16k_sos_fx; // Q31-ivas_lpf_4_butter_16k_sos_e
      67           0 :                     *ppFilt_coeff_e = ivas_lpf_4_butter_16k_sos_e;
      68           0 :                     BREAK;
      69           1 :                 case 32000:
      70           1 :                     *ppFilt_coeff_fx = ivas_lpf_4_butter_32k_sos_fx; // Q31-ivas_lpf_4_butter_32k_sos_e
      71           1 :                     *ppFilt_coeff_e = ivas_lpf_4_butter_32k_sos_e;
      72           1 :                     BREAK;
      73          89 :                 case 48000:
      74          89 :                     *ppFilt_coeff_fx = ivas_lpf_4_butter_48k_sos_fx; // Q31-ivas_lpf_4_butter_48k_sos_e
      75          89 :                     *ppFilt_coeff_e = ivas_lpf_4_butter_48k_sos_e;
      76          89 :                     BREAK;
      77           0 :                 default:
      78           0 :                     BREAK;
      79             :             }
      80          90 :             BREAK;
      81           0 :         default:
      82           0 :             assert( !"Unsupported LFE Filter order" );
      83             :     }
      84             : 
      85          90 :     return;
      86             : }
      87             : 
      88             : 
      89             : /*-----------------------------------------------------------------------------------------*
      90             :  * Function ivas_lfe_window_init()
      91             :  *
      92             :  * Initialize LFE window
      93             :  *-----------------------------------------------------------------------------------------*/
      94             : 
      95         712 : void ivas_lfe_window_init_fx(
      96             :     LFE_WINDOW_HANDLE hLFEWindow, /* i/o: LFE window handle           */
      97             :     const Word32 sampling_rate,   /* i  : sampling rate               */
      98             :     const Word16 frame_len        /* i  : frame length in samples     */
      99             : )
     100             : {
     101             :     /* Set window coefficients */
     102         712 :     IF( EQ_32( sampling_rate, 48000 ) )
     103             :     {
     104         570 :         hLFEWindow->pWindow_coeffs_fx = ivas_lfe_window_coeff_48k_fx; // Q31
     105             :     }
     106         142 :     ELSE IF( EQ_32( sampling_rate, 32000 ) )
     107             :     {
     108          72 :         hLFEWindow->pWindow_coeffs_fx = ivas_lfe_window_coeff_32k_fx; // Q31
     109             :     }
     110          70 :     ELSE IF( EQ_32( sampling_rate, 16000 ) )
     111             :     {
     112          70 :         hLFEWindow->pWindow_coeffs_fx = ivas_lfe_window_coeff_16k_fx; // Q31
     113             :     }
     114             :     ELSE
     115             :     {
     116           0 :         assert( !"8kHz LFE Window not supported" );
     117             :     }
     118             : 
     119             :     /* 10ms stride, MDCT will be done in two iterations */
     120         712 :     hLFEWindow->dct_len = shr( frame_len, 1 );
     121         712 :     move16();
     122             : 
     123             :     /* 8ms of latency */
     124         712 :     hLFEWindow->fade_len = NS2SA_FX2( sampling_rate, IVAS_LFE_FADE_NS );
     125         712 :     hLFEWindow->zero_pad_len = ( mult( IVAS_ZERO_PAD_LEN_MULT_FAC_fx, sub( hLFEWindow->dct_len, hLFEWindow->fade_len ) ) );
     126         712 :     hLFEWindow->full_len = add( add( hLFEWindow->zero_pad_len, hLFEWindow->fade_len ), hLFEWindow->dct_len );
     127         712 :     move16();
     128         712 :     move16();
     129         712 :     move16();
     130             : 
     131         712 :     move16();
     132         712 :     move16();
     133         712 :     move16();
     134         712 :     move16();
     135             : 
     136         712 :     return;
     137             : }