2 * This file is part of FFmpeg.
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.
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.
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
23 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
25 AVFilterLink *outlink = inlink->dst->outputs[0];
26 AVFrame *out = ff_get_audio_buffer(outlink, in->nb_samples);
30 return AVERROR(ENOMEM);
32 av_frame_copy_props(out, in);
33 av_frame_copy(out, in);
35 return ff_filter_frame(outlink, out);
38 static const AVFilterPad acopy_inputs[] = {
41 .type = AVMEDIA_TYPE_AUDIO,
42 .filter_frame = filter_frame,
47 static const AVFilterPad acopy_outputs[] = {
50 .type = AVMEDIA_TYPE_AUDIO,
55 AVFilter ff_af_acopy = {
57 .description = NULL_IF_CONFIG_SMALL("Copy the input audio unchanged to the output."),
58 .inputs = acopy_inputs,
59 .outputs = acopy_outputs,