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audiointerleave.h
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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 {
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
38 
39 int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame, AVRational time_base);
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  */
52  int (*get_packet)(AVFormatContext *, AVPacket *, AVPacket *, int),
53  int (*compare_ts)(AVFormatContext *, AVPacket *, AVPacket *));
54 
55 #endif /* AVFORMAT_AUDIOINTERLEAVE_H */
const char * s
Definition: avisynth_c.h:631
static void flush(AVCodecContext *avctx)
const int * samples
current samples per frame, pointer to samples_per_frame
const int * samples_per_frame
must be 0-terminated
static AVPacket pkt
Format I/O context.
Definition: avformat.h:1325
unsigned fifo_size
size of currently allocated FIFO
int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame, AVRational time_base)
uint64_t dts
current dts
void ff_audio_interleave_close(AVFormatContext *s)
AVRational time_base
time base of output audio packets
int ff_audio_rechunk_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush, int(*get_packet)(AVFormatContext *, AVPacket *, AVPacket *, int), int(*compare_ts)(AVFormatContext *, AVPacket *, AVPacket *))
Rechunk audio PCM packets per AudioInterleaveContext->samples_per_frame and interleave them correctly...
a very simple circular buffer FIFO implementation
rational number numerator/denominator
Definition: rational.h:43
int sample_size
size of one sample all channels included
Main libavformat public API header.
static int get_packet(URLContext *s, int for_header)
Interact with the server by receiving and sending RTMP packets until there is some significant data (...
Definition: rtmpproto.c:2396
FILE * out
Definition: movenc.c:54
This structure stores compressed data.
Definition: avcodec.h:1565