FFmpeg
ttmlenc.h
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1 /*
2  * Generic TTML helpers
3  * Copyright (c) 2021 24i
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
20  */
21 
22 #ifndef AVFORMAT_TTMLENC_H
23 #define AVFORMAT_TTMLENC_H
24 
25 #include "libavcodec/codec_par.h"
26 #include "libavcodec/ttmlenc.h"
27 
28 static inline unsigned int ff_is_ttml_stream_paragraph_based(const AVCodecParameters *codecpar)
29 {
30  // Not perfect, but decide whether the packet is a document or not
31  // by the existence of the lavc ttmlenc extradata.
32  return (codecpar->extradata &&
34  !memcmp(codecpar->extradata,
37 }
38 
39 #endif /* AVFORMAT_TTMLENC_H */
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
TTMLENC_EXTRADATA_SIGNATURE_SIZE
#define TTMLENC_EXTRADATA_SIGNATURE_SIZE
Definition: ttmlenc.h:26
TTMLENC_EXTRADATA_SIGNATURE
#define TTMLENC_EXTRADATA_SIGNATURE
Definition: ttmlenc.h:25
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
ttmlenc.h
codec_par.h
ff_is_ttml_stream_paragraph_based
static unsigned int ff_is_ttml_stream_paragraph_based(const AVCodecParameters *codecpar)
Definition: ttmlenc.h:28