2 * audio interleaving prototypes and declarations
4 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef AVFORMAT_AUDIOINTERLEAVE_H
24 #define AVFORMAT_AUDIOINTERLEAVE_H
26 #include "libavutil/fifo.h"
29 typedef struct AudioInterleaveContext {
31 unsigned fifo_size; ///< size of currently allocated FIFO
32 int64_t n; ///< number of generated packets
33 int64_t nb_samples; ///< number of generated samples
34 uint64_t dts; ///< current dts
35 int sample_size; ///< size of one sample all channels included
36 int samples_per_frame; ///< samples per frame if fixed, 0 otherwise
37 AVRational time_base; ///< time base of output audio packets
38 } AudioInterleaveContext;
40 int ff_audio_interleave_init(AVFormatContext *s, const int samples_per_frame, AVRational time_base);
41 void ff_audio_interleave_close(AVFormatContext *s);
44 * Rechunk audio PCM packets per AudioInterleaveContext->samples_per_frame
45 * and interleave them correctly.
46 * The first element of AVStream->priv_data must be AudioInterleaveContext
47 * when using this function.
49 * @param get_packet function will output a packet when streams are correctly interleaved.
50 * @param compare_ts function will compare AVPackets and decide interleaving order.
52 int ff_audio_rechunk_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush,
53 int (*get_packet)(AVFormatContext *, AVPacket *, AVPacket *, int),
54 int (*compare_ts)(AVFormatContext *, const AVPacket *, const AVPacket *));
56 #endif /* AVFORMAT_AUDIOINTERLEAVE_H */