ffmpeg/libswresample/resample_dsp.c

   1 /*
   2  * audio resampling
   3  * Copyright (c) 2004-2012 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file
  24  * audio resampling
  25  * @author Michael Niedermayer <michaelni@gmx.at>
  26  */
  27
  28 #include "resample.h"
  29
  30 #define TEMPLATE_RESAMPLE_S16
  31 #include "resample_template.c"
  32 #undef TEMPLATE_RESAMPLE_S16
  33
  34 #define TEMPLATE_RESAMPLE_S32
  35 #include "resample_template.c"
  36 #undef TEMPLATE_RESAMPLE_S32
  37
  38 #define TEMPLATE_RESAMPLE_FLT
  39 #include "resample_template.c"
  40 #undef TEMPLATE_RESAMPLE_FLT
  41
  42 #define TEMPLATE_RESAMPLE_DBL
  43 #include "resample_template.c"
  44 #undef TEMPLATE_RESAMPLE_DBL
  45
  46 void swri_resample_dsp_init(ResampleContext *c)
  47 {
  48     switch(c->format){
  49     case AV_SAMPLE_FMT_S16P:
  50         c->dsp.resample_one = resample_one_int16;
  51         c->dsp.resample     = c->linear ? resample_linear_int16 : resample_common_int16;
  52         break;
  53     case AV_SAMPLE_FMT_S32P:
  54         c->dsp.resample_one = resample_one_int32;
  55         c->dsp.resample     = c->linear ? resample_linear_int32 : resample_common_int32;
  56         break;
  57     case AV_SAMPLE_FMT_FLTP:
  58         c->dsp.resample_one = resample_one_float;
  59         c->dsp.resample     = c->linear ? resample_linear_float : resample_common_float;
  60         break;
  61     case AV_SAMPLE_FMT_DBLP:
  62         c->dsp.resample_one = resample_one_double;
  63         c->dsp.resample     = c->linear ? resample_linear_double : resample_common_double;
  64         break;
  65     }
  66
  67     if (ARCH_X86) swri_resample_dsp_x86_init(c);
  68 }