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FFmpeg/libswresample/resample_dsp.c

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  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 DO_RESAMPLE_ONE 1

  31. 

  32. #define TEMPLATE_RESAMPLE_S16

  33. #include "resample_template.c"

  34. #undef TEMPLATE_RESAMPLE_S16

  35. 

  36. #define TEMPLATE_RESAMPLE_S32

  37. #include "resample_template.c"

  38. #undef TEMPLATE_RESAMPLE_S32

  39. 

  40. #define TEMPLATE_RESAMPLE_FLT

  41. #include "resample_template.c"

  42. #undef TEMPLATE_RESAMPLE_FLT

  43. 

  44. #define TEMPLATE_RESAMPLE_DBL

  45. #include "resample_template.c"

  46. #undef TEMPLATE_RESAMPLE_DBL

  47. 

  48. #undef DO_RESAMPLE_ONE

  49. 

  50. void swresample_dsp_init(ResampleContext *c)

  51. {

  52. #define FNIDX(fmt) (AV_SAMPLE_FMT_##fmt - AV_SAMPLE_FMT_S16P)

  53.     c->dsp.resample_one[FNIDX(S16P)] = (resample_one_fn) resample_one_int16;

  54.     c->dsp.resample_one[FNIDX(S32P)] = (resample_one_fn) resample_one_int32;

  55.     c->dsp.resample_one[FNIDX(FLTP)] = (resample_one_fn) resample_one_float;

  56.     c->dsp.resample_one[FNIDX(DBLP)] = (resample_one_fn) resample_one_double;

  57. 

  58.     c->dsp.resample_common[FNIDX(S16P)] = (resample_fn) resample_common_int16;

  59.     c->dsp.resample_common[FNIDX(S32P)] = (resample_fn) resample_common_int32;

  60.     c->dsp.resample_common[FNIDX(FLTP)] = (resample_fn) resample_common_float;

  61.     c->dsp.resample_common[FNIDX(DBLP)] = (resample_fn) resample_common_double;

  62. 

  63.     c->dsp.resample_linear[FNIDX(S16P)] = (resample_fn) resample_linear_int16;

  64.     c->dsp.resample_linear[FNIDX(S32P)] = (resample_fn) resample_linear_int32;

  65.     c->dsp.resample_linear[FNIDX(FLTP)] = (resample_fn) resample_linear_float;

  66.     c->dsp.resample_linear[FNIDX(DBLP)] = (resample_fn) resample_linear_double;

  67. 

  68.     if (ARCH_X86) swresample_dsp_x86_init(c);

  69. }