FFmpeg
dvbtxt.h
Go to the documentation of this file.
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 {
30  return (data_identifier >= 0x10 && data_identifier <= 0x1F ||
31  data_identifier >= 0x99 && data_identifier <= 0x9B);
32 }
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 {
38  return (data_unit_id == 0x02 || data_unit_id == 0x03);
39 }
40 
41 #endif /* AVCODEC_DVBTXT_H */
static av_always_inline int ff_data_identifier_is_teletext(int data_identifier)
Definition: dvbtxt.h:28
static av_always_inline int ff_data_unit_id_is_teletext(int data_unit_id)
Definition: dvbtxt.h:36
Macro definitions for various function/variable attributes.
#define av_always_inline
Definition: attributes.h:39