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42 lines
1.4 KiB
42 lines
1.4 KiB
9 years ago
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/*
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* DVB teletext common functions.
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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 AVCODEC_DVBTXT_H
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#define AVCODEC_DVBTXT_H
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#include "libavutil/attributes.h"
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/* Returns true if data identifier matches a teletext stream according to EN
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* 301 775 section 4.4.2 */
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static av_always_inline int ff_data_identifier_is_teletext(int data_identifier)
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{
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return (data_identifier >= 0x10 && data_identifier <= 0x1F ||
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data_identifier >= 0x99 && data_identifier <= 0x9B);
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}
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/* Returns true if data unit id matches EBU teletext data according to
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* EN 301 775 section 4.4.2 */
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static av_always_inline int ff_data_unit_id_is_teletext(int data_unit_id)
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{
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return (data_unit_id == 0x02 || data_unit_id == 0x03);
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}
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#endif /* AVCODEC_DVBTXT_H */
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