h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / interlace.h
1 /*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; 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 {
43 FIELD_UPPER = 0,
44 FIELD_LOWER = 1,
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 filtering
51 AVFrame *cur, *next; // the two frames from which the new one is obtained
52 int got_output; // signal an output frame is ready to request_frame()
53 void (*lowpass_line)(uint8_t *dstp, ptrdiff_t linesize, const uint8_t *srcp,
54 const uint8_t *srcp_above, const uint8_t *srcp_below);
55 } InterlaceContext;
56
57 void ff_interlace_init_x86(InterlaceContext *interlace);
58
59 #endif /* AVFILTER_INTERLACE_H */