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gradfun.h
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1 /*
2  * Copyright (c) 2010 Nolan Lum <nol888@gmail.com>
3  * Copyright (c) 2009 Loren Merritt <lorenm@u.washington.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  float strength;
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);
41 
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 */