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 AVFilterFormats *formats = NULL;
33 int ret;
34
35 ret = ff_formats_pixdesc_filter(&formats, 0,
36 AV_PIX_FMT_FLAG_HWACCEL);
37 if (ret < 0)
38 return ret;
39 return ff_set_common_formats(ctx, formats);
40 }
41
filter_frame(AVFilterLink * inlink,AVFrame * in)42 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
43 {
44 AVFilterLink *outlink = inlink->dst->outputs[0];
45 AVFrame *out = ff_get_video_buffer(outlink, in->width, in->height);
46 int ret;
47
48 if (!out) {
49 ret = AVERROR(ENOMEM);
50 goto fail;
51 }
52
53 ret = av_frame_copy_props(out, in);
54 if (ret < 0)
55 goto fail;
56 ret = av_frame_copy(out, in);
57 if (ret < 0)
58 goto fail;
59 av_frame_free(&in);
60 return ff_filter_frame(outlink, out);
61 fail:
62 av_frame_free(&in);
63 av_frame_free(&out);
64 return ret;
65 }
66
67 static const AVFilterPad avfilter_vf_copy_inputs[] = {
68 {
69 .name = "default",
70 .type = AVMEDIA_TYPE_VIDEO,
71 .filter_frame = filter_frame,
72 },
73 { NULL }
74 };
75
76 static const AVFilterPad avfilter_vf_copy_outputs[] = {
77 {
78 .name = "default",
79 .type = AVMEDIA_TYPE_VIDEO,
80 },
81 { NULL }
82 };
83
84 AVFilter ff_vf_copy = {
85 .name = "copy",
86 .description = NULL_IF_CONFIG_SMALL("Copy the input video unchanged to the output."),
87 .inputs = avfilter_vf_copy_inputs,
88 .outputs = avfilter_vf_copy_outputs,
89 .query_formats = query_formats,
90 };
91