h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / audio.h
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 */
25 AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples);
26
27 /** get_audio_buffer() handler for filters which simply pass audio along */
28 AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples);
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
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 */
39 AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples);
40
41 #endif /* AVFILTER_AUDIO_H */