diff options
Diffstat (limited to 'libavcodec/dvbtxt.h')
-rw-r--r-- | libavcodec/dvbtxt.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/libavcodec/dvbtxt.h b/libavcodec/dvbtxt.h new file mode 100644 index 0000000000..ff88fcf0b2 --- /dev/null +++ b/libavcodec/dvbtxt.h @@ -0,0 +1,41 @@ +/* + * 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 */ |