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
21 * copy video filter
22 */
23
24 #include "libavutil/imgutils.h"
25 #include "libavutil/internal.h"
26 #include "avfilter.h"
27 #include "internal.h"
28 #include "video.h"
29
query_formats(AVFilterContext * ctx)30 static int query_formats(AVFilterContext *ctx)
31 {
32 return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(0, AV_PIX_FMT_FLAG_HWACCEL));
33 }
34
filter_frame(AVFilterLink * inlink,AVFrame * in)35 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
36 {
37 AVFilterLink *outlink = inlink->dst->outputs[0];
38 AVFrame *out = ff_get_video_buffer(outlink, in->width, in->height);
39 int ret;
40
41 if (!out) {
42 ret = AVERROR(ENOMEM);
43 goto fail;
44 }
45
46 ret = av_frame_copy_props(out, in);
47 if (ret < 0)
48 goto fail;
49 ret = av_frame_copy(out, in);
50 if (ret < 0)
51 goto fail;
52 av_frame_free(&in);
53 return ff_filter_frame(outlink, out);
54 fail:
55 av_frame_free(&in);
56 av_frame_free(&out);
57 return ret;
58 }
59
60 static const AVFilterPad avfilter_vf_copy_inputs[] = {
61 {
62 .name = "default",
63 .type = AVMEDIA_TYPE_VIDEO,
64 .filter_frame = filter_frame,
65 },
66 };
67
68 static const AVFilterPad avfilter_vf_copy_outputs[] = {
69 {
70 .name = "default",
71 .type = AVMEDIA_TYPE_VIDEO,
72 },
73 };
74
75 const AVFilter ff_vf_copy = {
76 .name = "copy",
77 .description = NULL_IF_CONFIG_SMALL("Copy the input video unchanged to the output."),
78 .flags = AVFILTER_FLAG_METADATA_ONLY,
79 FILTER_INPUTS(avfilter_vf_copy_inputs),
80 FILTER_OUTPUTS(avfilter_vf_copy_outputs),
81 FILTER_QUERY_FUNC(query_formats),
82 };
83