git.sesse.net Git - vlc/blob - src/ac3_decoder/ac3_downmix.c

   1 /*****************************************************************************
   2  * ac3_downmix.c: ac3 downmix functions
   3  *****************************************************************************
   4  * Copyright (C) 1999, 2000 VideoLAN
   5  * $Id: ac3_downmix.c,v 1.22 2001/05/06 04:32:02 sam Exp $
   6  *
   7  * Authors: Michel Kaempf <maxx@via.ecp.fr>
   8  *          Aaron Holtzman <aholtzma@engr.uvic.ca>
   9  *          Renaud Dartus <reno@videolan.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  24  *****************************************************************************/
  25 #include "defs.h"
  26
  27 #include <string.h>                                              /* memcpy() */
  28
  29 #include "config.h"
  30 #include "common.h"
  31 #include "threads.h"
  32 #include "mtime.h"
  33
  34 #include "tests.h"
  35
  36 #include "stream_control.h"
  37 #include "input_ext-dec.h"
  38
  39 #include "ac3_decoder.h"
  40 #include "ac3_internal.h"
  41 #include "ac3_downmix.h"
  42
  43 void downmix_init (downmix_t * p_downmix)
  44 {
  45 #if 0
  46     if ( TestCPU (CPU_CAPABILITY_MMX) )
  47     {
  48                 fprintf(stderr,"Using MMX for downmix\n");
  49                 p_downmix->downmix_3f_2r_to_2ch = downmix_3f_2r_to_2ch_kni;
  50                 p_downmix->downmix_2f_2r_to_2ch = downmix_2f_2r_to_2ch_kni;
  51                 p_downmix->downmix_3f_1r_to_2ch = downmix_3f_1r_to_2ch_kni;
  52                 p_downmix->downmix_2f_1r_to_2ch = downmix_2f_1r_to_2ch_kni;
  53                 p_downmix->downmix_3f_0r_to_2ch = downmix_3f_0r_to_2ch_kni;
  54                 p_downmix->stream_sample_2ch_to_s16 = stream_sample_2ch_to_s16_kni;
  55         p_downmix->stream_sample_1ch_to_s16 = stream_sample_1ch_to_s16_kni;
  56     } else
  57 #endif
  58     {
  59                 p_downmix->downmix_3f_2r_to_2ch = downmix_3f_2r_to_2ch_c;
  60                 p_downmix->downmix_2f_2r_to_2ch = downmix_2f_2r_to_2ch_c;
  61                 p_downmix->downmix_3f_1r_to_2ch = downmix_3f_1r_to_2ch_c;
  62                 p_downmix->downmix_2f_1r_to_2ch = downmix_2f_1r_to_2ch_c;
  63                 p_downmix->downmix_3f_0r_to_2ch = downmix_3f_0r_to_2ch_c;
  64                 p_downmix->stream_sample_2ch_to_s16 = stream_sample_2ch_to_s16_c;
  65                 p_downmix->stream_sample_1ch_to_s16 = stream_sample_1ch_to_s16_c;
  66     }
  67 }