2 * Copyright (c) Stefano Sabatini | stefasab at gmail.com
3 * Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef AVFILTER_AUDIO_H
23 #define AVFILTER_AUDIO_H
28 static const enum AVSampleFormat ff_packed_sample_fmts_array[] = {
37 static const enum AVSampleFormat ff_planar_sample_fmts_array[] = {
46 /** default handler for get_audio_buffer() for audio inputs */
47 AVFilterBufferRef *ff_default_get_audio_buffer(AVFilterLink *link, int perms,
50 /** get_audio_buffer() handler for filters which simply pass audio along */
51 AVFilterBufferRef *ff_null_get_audio_buffer(AVFilterLink *link, int perms,
55 * Request an audio samples buffer with a specific set of permissions.
57 * @param link the output link to the filter from which the buffer will
59 * @param perms the required access permissions
60 * @param nb_samples the number of samples per channel
61 * @return A reference to the samples. This must be unreferenced with
62 * avfilter_unref_buffer when you are finished with it.
64 AVFilterBufferRef *ff_get_audio_buffer(AVFilterLink *link, int perms,
68 * Send a buffer of audio samples to the next filter.
70 * @param link the output link over which the audio samples are being sent
71 * @param samplesref a reference to the buffer of audio samples being sent. The
72 * receiving filter will free this reference when it no longer
73 * needs it or pass it on to the next filter.
75 * @return >= 0 on success, a negative AVERROR on error. The receiving filter
76 * is responsible for unreferencing samplesref in case of error.
78 int ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref);
81 * Send a buffer of audio samples to the next link, without checking
84 int ff_filter_samples_framed(AVFilterLink *link,
85 AVFilterBufferRef *samplesref);
87 #endif /* AVFILTER_AUDIO_H */