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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. int swri_resample_common_int16 (ResampleContext *c, int16_t *dst, const int16_t *src, int n, int update_ctx);

  31. int swri_resample_common_int32 (ResampleContext *c, int32_t *dst, const int32_t *src, int n, int update_ctx);

  32. int swri_resample_common_float (ResampleContext *c,   float *dst, const   float *src, int n, int update_ctx);

  33. int swri_resample_common_double(ResampleContext *c,  double *dst, const  double *src, int n, int update_ctx);

  34. int swri_resample_linear_int16 (ResampleContext *c, int16_t *dst, const int16_t *src, int n, int update_ctx);

  35. int swri_resample_linear_int32 (ResampleContext *c, int32_t *dst, const int32_t *src, int n, int update_ctx);

  36. int swri_resample_linear_float (ResampleContext *c,   float *dst, const   float *src, int n, int update_ctx);

  37. int swri_resample_linear_double(ResampleContext *c,  double *dst, const  double *src, int n, int update_ctx);

  38. 

  39. #define DO_RESAMPLE_ONE 1

  40. 

  41. #define TEMPLATE_RESAMPLE_S16

  42. #include "resample_template.c"

  43. #undef TEMPLATE_RESAMPLE_S16

  44. 

  45. #define TEMPLATE_RESAMPLE_S32

  46. #include "resample_template.c"

  47. #undef TEMPLATE_RESAMPLE_S32

  48. 

  49. #define TEMPLATE_RESAMPLE_FLT

  50. #include "resample_template.c"

  51. #undef TEMPLATE_RESAMPLE_FLT

  52. 

  53. #define TEMPLATE_RESAMPLE_DBL

  54. #include "resample_template.c"

  55. #undef TEMPLATE_RESAMPLE_DBL

  56. 

  57. #undef DO_RESAMPLE_ONE

  58. 

  59. void swresample_dsp_init(ResampleContext *c)

  60. {

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

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

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

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

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

  66. 

  67.     c->dsp.resample_common[FNIDX(S16P)] = (resample_fn) swri_resample_common_int16;

  68.     c->dsp.resample_common[FNIDX(S32P)] = (resample_fn) swri_resample_common_int32;

  69.     c->dsp.resample_common[FNIDX(FLTP)] = (resample_fn) swri_resample_common_float;

  70.     c->dsp.resample_common[FNIDX(DBLP)] = (resample_fn) swri_resample_common_double;

  71. 

  72.     c->dsp.resample_linear[FNIDX(S16P)] = (resample_fn) swri_resample_linear_int16;

  73.     c->dsp.resample_linear[FNIDX(S32P)] = (resample_fn) swri_resample_linear_int32;

  74.     c->dsp.resample_linear[FNIDX(FLTP)] = (resample_fn) swri_resample_linear_float;

  75.     c->dsp.resample_linear[FNIDX(DBLP)] = (resample_fn) swri_resample_linear_double;

  76. 

  77.     if (ARCH_X86) swresample_dsp_x86_init(c);

  78. }