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interlace.h
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17  */
18 
19 /**
20  * @file
21  * progressive to interlaced content filter, inspired by heavy debugging of
22  * tinterlace filter.
23  */
24 
25 #ifndef AVFILTER_INTERLACE_H
26 #define AVFILTER_INTERLACE_H
27 
28 #include "libavutil/common.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/opt.h"
31 
32 #include "avfilter.h"
33 #include "formats.h"
34 #include "internal.h"
35 #include "video.h"
36 
37 enum ScanMode {
38  MODE_TFF = 0,
39  MODE_BFF = 1,
40 };
41 
42 enum FieldType {
45 };
46 
47 typedef struct InterlaceContext {
48  const AVClass *class;
49  enum ScanMode scan; // top or bottom field first scanning
50  int lowpass; // enable or disable low pass filterning
51  AVFrame *cur, *next; // the two frames from which the new one is obtained
52  void (*lowpass_line)(uint8_t *dstp, ptrdiff_t linesize, const uint8_t *srcp,
53  const uint8_t *srcp_above, const uint8_t *srcp_below);
55 
57 
58 #endif /* AVFILTER_INTERLACE_H */