h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / audio.h
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1/*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#ifndef AVFILTER_AUDIO_H
20#define AVFILTER_AUDIO_H
21
22#include "avfilter.h"
23
24/** default handler for get_audio_buffer() for audio inputs */
7e350379 25AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples);
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26
27/** get_audio_buffer() handler for filters which simply pass audio along */
7e350379 28AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples);
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29
30/**
31 * Request an audio samples buffer with a specific set of permissions.
32 *
33 * @param link the output link to the filter from which the buffer will
34 * be requested
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35 * @param nb_samples the number of samples per channel
36 * @return A reference to the samples. This must be unreferenced with
37 * avfilter_unref_buffer when you are finished with it.
38 */
7e350379 39AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples);
472fb3bb 40
472fb3bb 41#endif /* AVFILTER_AUDIO_H */