/src/ffmpeg/libavcodec/dvbtxt.h
Line | Count | Source |
1 | | /* |
2 | | * DVB teletext common functions. |
3 | | * |
4 | | * This file is part of FFmpeg. |
5 | | * |
6 | | * FFmpeg is free software; you can redistribute it and/or |
7 | | * modify it under the terms of the GNU Lesser General Public |
8 | | * License as published by the Free Software Foundation; either |
9 | | * version 2.1 of the License, or (at your option) any later version. |
10 | | * |
11 | | * FFmpeg is distributed in the hope that it will be useful, |
12 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | | * Lesser General Public License for more details. |
15 | | * |
16 | | * You should have received a copy of the GNU Lesser General Public |
17 | | * License along with FFmpeg; if not, write to the Free Software |
18 | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | | */ |
20 | | |
21 | | #ifndef AVCODEC_DVBTXT_H |
22 | | #define AVCODEC_DVBTXT_H |
23 | | |
24 | | #include "libavutil/attributes.h" |
25 | | |
26 | | /* Returns true if data identifier matches a teletext stream according to EN |
27 | | * 301 775 section 4.4.2 */ |
28 | | static av_always_inline int ff_data_identifier_is_teletext(int data_identifier) |
29 | 2.65k | { |
30 | 2.65k | return (data_identifier >= 0x10 && data_identifier <= 0x1F || |
31 | 2.34k | data_identifier >= 0x99 && data_identifier <= 0x9B); |
32 | 2.65k | } |
33 | | |
34 | | /* Returns true if data unit id matches EBU teletext data according to |
35 | | * EN 301 775 section 4.4.2 */ |
36 | | static av_always_inline int ff_data_unit_id_is_teletext(int data_unit_id) |
37 | 499 | { |
38 | 499 | return (data_unit_id == 0x02 || data_unit_id == 0x03); |
39 | 499 | } |
40 | | |
41 | | #endif /* AVCODEC_DVBTXT_H */ |