Add the null video filter.
[libav.git] / libavfilter / vf_null.c
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (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 GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /**
20 * @file libavfilter/vf_null.c
21 * null filter
22 */
23
24 #include "avfilter.h"
25
26 static AVFilterPicRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
27 {
28 return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
29 }
30
31 static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
32 {
33 avfilter_start_frame(link->dst->outputs[0], picref);
34 }
35
36 static void end_frame(AVFilterLink *link)
37 {
38 avfilter_end_frame(link->dst->outputs[0]);
39 }
40
41 AVFilter avfilter_vf_null = {
42 .name = "null",
43
44 .priv_size = 0,
45
46 .inputs = (AVFilterPad[]) {{ .name = "default",
47 .type = CODEC_TYPE_VIDEO,
48 .get_video_buffer = get_video_buffer,
49 .start_frame = start_frame,
50 .end_frame = end_frame },
51 { .name = NULL}},
52
53 .outputs = (AVFilterPad[]) {{ .name = "default",
54 .type = CODEC_TYPE_VIDEO, },
55 { .name = NULL}},
56 };