h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / asrc_anullsrc.c
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1ee410f3 1/*
2912e87a 2 * This file is part of Libav.
1ee410f3 3 *
2912e87a 4 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 9 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 15 * License along with Libav; if not, write to the Free Software
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16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19/**
20 * @file
21 * null audio source
22 */
23
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24#include <inttypes.h>
25#include <stdio.h>
26
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27#include "libavutil/channel_layout.h"
28#include "libavutil/internal.h"
1ee410f3 29#include "avfilter.h"
9d0bfc50 30#include "internal.h"
1ee410f3 31
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32static int request_frame(AVFilterLink *link)
33{
c2b9bd97 34 return AVERROR_EOF;
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35}
36
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37static const AVFilterPad avfilter_asrc_anullsrc_outputs[] = {
38 {
39 .name = "default",
40 .type = AVMEDIA_TYPE_AUDIO,
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41 .request_frame = request_frame,
42 },
43 { NULL }
44};
45
cd43ca04 46AVFilter ff_asrc_anullsrc = {
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47 .name = "anullsrc",
48 .description = NULL_IF_CONFIG_SMALL("Null audio source, never return audio frames."),
49
1fce361d 50 .inputs = NULL,
1ee410f3 51
568c70e7 52 .outputs = avfilter_asrc_anullsrc_outputs,
1ee410f3 53};