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/*
* Generic TTML helpers
* Copyright (c) 2021 24i
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_TTMLENC_H
#define AVFORMAT_TTMLENC_H
#include "libavcodec/codec_par.h"
#include "libavcodec/ttmlenc.h"
static inline unsigned int ff_is_ttml_stream_paragraph_based(const AVCodecParameters *codecpar)
{
// Not perfect, but decide whether the packet is a document or not
// by the existence of the lavc ttmlenc extradata.
return (codecpar->extradata &&
codecpar->extradata_size >= TTMLENC_EXTRADATA_SIGNATURE_SIZE &&
!memcmp(codecpar->extradata,
TTMLENC_EXTRADATA_SIGNATURE,
TTMLENC_EXTRADATA_SIGNATURE_SIZE));
}
#endif /* AVFORMAT_TTMLENC_H */
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