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FFmpeg/libavfilter/gradfun.h

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  1. /*

  2.  * Copyright (c) 2010 Nolan Lum <nol888@gmail.com>

  3.  * Copyright (c) 2009 Loren Merritt <lorenm@u.washignton.edu>

  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 AVFILTER_GRADFUN_H

  23. #define AVFILTER_GRADFUN_H

  24. 

  25. #include "avfilter.h"

  26. 

  27. /// Holds instance-specific information for gradfun.

  28. typedef struct GradFunContext {

  29.     const AVClass *class;

  30.     double strength;    ///< user specified strength, used to define thresh

  31.     int thresh;    ///< threshold for gradient algorithm

  32.     int radius;    ///< blur radius

  33.     int chroma_w;  ///< width of the chroma planes

  34.     int chroma_h;  ///< weight of the chroma planes

  35.     int chroma_r;  ///< blur radius for the chroma planes

  36.     uint16_t *buf; ///< holds image data for blur algorithm passed into filter.

  37.     /// DSP functions.

  38.     void (*filter_line) (uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers);

  39.     void (*blur_line) (uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width);

  40. } GradFunContext;

  41. 

  42. void ff_gradfun_init_x86(GradFunContext *gf);

  43. 

  44. void ff_gradfun_filter_line_c(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers);

  45. void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width);

  46. 

  47. #endif /* AVFILTER_GRADFUN_H */