blob: 4d77832fa164ab5fcdfcdd3dc7d3ff6be4485851
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 | |
29 | typedef struct AudioInterleaveContext { |
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 | |
39 | int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame, AVRational time_base); |
40 | void ff_audio_interleave_close(AVFormatContext *s); |
41 | |
42 | /** |
43 | * Rechunk audio PCM packets per AudioInterleaveContext->samples_per_frame |
44 | * and interleave them correctly. |
45 | * The first element of AVStream->priv_data must be AudioInterleaveContext |
46 | * when using this function. |
47 | * |
48 | * @param get_packet function will output a packet when streams are correctly interleaved. |
49 | * @param compare_ts function will compare AVPackets and decide interleaving order. |
50 | */ |
51 | int ff_audio_rechunk_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush, |
52 | int (*get_packet)(AVFormatContext *, AVPacket *, AVPacket *, int), |
53 | int (*compare_ts)(AVFormatContext *, AVPacket *, AVPacket *)); |
54 | |
55 | #endif /* AVFORMAT_AUDIOINTERLEAVE_H */ |
56 |