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