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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. #ifndef SWRESAMPLE_RESAMPLE_H
  23. #define SWRESAMPLE_RESAMPLE_H
  24.  
  25. #include "libavutil/log.h"
  26. #include "libavutil/samplefmt.h"
  27.  
  28. #include "swresample_internal.h"
  29.  
  30. typedef struct ResampleContext {
  31.     const AVClass *av_class;
  32.     uint8_t *filter_bank;
  33.     int filter_length;
  34.     int filter_alloc;
  35.     int ideal_dst_incr;
  36.     int dst_incr;
  37.     int dst_incr_div;
  38.     int dst_incr_mod;
  39.     int index;
  40.     int frac;
  41.     int src_incr;
  42.     int compensation_distance;
  43.     int phase_shift;
  44.     int phase_mask;
  45.     int linear;
  46.     enum SwrFilterType filter_type;
  47.     int kaiser_beta;
  48.     double factor;
  49.     enum AVSampleFormat format;
  50.     int felem_size;
  51.     int filter_shift;
  52.  
  53.     struct {
  54.         void (*resample_one)(void *dst, const void *src,
  55.                              int n, int64_t index, int64_t incr);
  56.         int (*resample)(struct ResampleContext *c, void *dst,
  57.                         const void *src, int n, int update_ctx);
  58.     } dsp;
  59. } ResampleContext;
  60.  
  61. void swri_resample_dsp_init(ResampleContext *c);
  62. void swri_resample_dsp_x86_init(ResampleContext *c);
  63.  
  64. #endif /* SWRESAMPLE_RESAMPLE_H */
  65.