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 fmt;
34
35 for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
36 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
37 int ret;
38 if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
39 continue;
40 if ((ret = ff_add_format(&formats, fmt)) < 0)
41 return ret;
42 }
43
44 return ff_set_common_formats(ctx, formats);
45 }
46
filter_frame(AVFilterLink * inlink,AVFrame * in)47 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
48 {
49 AVFilterLink *outlink = inlink->dst->outputs[0];
50 AVFrame *out = ff_get_video_buffer(outlink, in->width, in->height);
51 int ret;
52
53 if (!out) {
54 ret = AVERROR(ENOMEM);
55 goto fail;
56 }
57
58 ret = av_frame_copy_props(out, in);
59 if (ret < 0)
60 goto fail;
61 ret = av_frame_copy(out, in);
62 if (ret < 0)
63 goto fail;
64 av_frame_free(&in);
65 return ff_filter_frame(outlink, out);
66 fail:
67 av_frame_free(&in);
68 av_frame_free(&out);
69 return ret;
70 }
71
72 static const AVFilterPad avfilter_vf_copy_inputs[] = {
73 {
74 .name = "default",
75 .type = AVMEDIA_TYPE_VIDEO,
76 .filter_frame = filter_frame,
77 },
78 { NULL }
79 };
80
81 static const AVFilterPad avfilter_vf_copy_outputs[] = {
82 {
83 .name = "default",
84 .type = AVMEDIA_TYPE_VIDEO,
85 },
86 { NULL }
87 };
88
89 AVFilter ff_vf_copy = {
90 .name = "copy",
91 .description = NULL_IF_CONFIG_SMALL("Copy the input video unchanged to the output."),
92 .inputs = avfilter_vf_copy_inputs,
93 .outputs = avfilter_vf_copy_outputs,
94 .query_formats = query_formats,
95 };
96