| /* |
| * 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 */ |