aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* DVB teletext common functions.
*
* 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 AVCODEC_DVBTXT_H
#define AVCODEC_DVBTXT_H
#include "libavutil/attributes.h"
/* Returns true if data identifier matches a teletext stream according to EN
* 301 775 section 4.4.2 */
static av_always_inline int ff_data_identifier_is_teletext(int data_identifier)
{
return (data_identifier >= 0x10 && data_identifier <= 0x1F ||
data_identifier >= 0x99 && data_identifier <= 0x9B);
}
/* Returns true if data unit id matches EBU teletext data according to
* EN 301 775 section 4.4.2 */
static av_always_inline int ff_data_unit_id_is_teletext(int data_unit_id)
{
return (data_unit_id == 0x02 || data_unit_id == 0x03);
}
#endif /* AVCODEC_DVBTXT_H */
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