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 #include "audio.h"
20 #include "avfilter.h"
21 #include "internal.h"
22
filter_frame(AVFilterLink * inlink,AVFrame * in)23 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
24 {
25 AVFilterLink *outlink = inlink->dst->outputs[0];
26 AVFrame *out = ff_get_audio_buffer(outlink, in->nb_samples);
27 int ret;
28
29 if (!out) {
30 ret = AVERROR(ENOMEM);
31 goto fail;
32 }
33
34 ret = av_frame_copy_props(out, in);
35 if (ret < 0)
36 goto fail;
37 ret = av_frame_copy(out, in);
38 if (ret < 0)
39 goto fail;
40 av_frame_free(&in);
41 return ff_filter_frame(outlink, out);
42 fail:
43 av_frame_free(&in);
44 av_frame_free(&out);
45 return ret;
46 }
47
48 static const AVFilterPad acopy_inputs[] = {
49 {
50 .name = "default",
51 .type = AVMEDIA_TYPE_AUDIO,
52 .filter_frame = filter_frame,
53 },
54 };
55
56 static const AVFilterPad acopy_outputs[] = {
57 {
58 .name = "default",
59 .type = AVMEDIA_TYPE_AUDIO,
60 },
61 };
62
63 const AVFilter ff_af_acopy = {
64 .name = "acopy",
65 .description = NULL_IF_CONFIG_SMALL("Copy the input audio unchanged to the output."),
66 .flags = AVFILTER_FLAG_METADATA_ONLY,
67 FILTER_INPUTS(acopy_inputs),
68 FILTER_OUTPUTS(acopy_outputs),
69 };
70