1/*
2 * audio interleaving prototypes and declarations
3 *
4 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5 *
6 * This file is part of FFmpeg.
7 *
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.
12 *
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.
17 *
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
21 */
22
23#ifndef AVFORMAT_AUDIOINTERLEAVE_H
24#define AVFORMAT_AUDIOINTERLEAVE_H
25
26#include "libavutil/fifo.h"
27#include "avformat.h"
28
29typedef struct {
30    AVFifoBuffer *fifo;
31    unsigned fifo_size;           ///< size of currently allocated FIFO
32    uint64_t dts;                 ///< current dts
33    int sample_size;              ///< size of one sample all channels included
34    const int *samples_per_frame; ///< must be 0-terminated
35    const int *samples;           ///< current samples per frame, pointer to samples_per_frame
36    AVRational time_base;         ///< time base of output audio packets
37} AudioInterleaveContext;
38
39int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame, AVRational time_base);
40void ff_audio_interleave_close(AVFormatContext *s);
41
42int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt);
43/**
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.
48 *
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.
51 */
52int 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 *, AVPacket *, AVPacket *));
55
56#endif /* AVFORMAT_AUDIOINTERLEAVE_H */
57