1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/*
* section and descriptor parser
*
* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef _UCSI_ATSC_ETT_SECTION_H
#define _UCSI_ATSC_ETT_SECTION_H 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/atsc/section.h>
enum atsc_etm_type {
ATSC_ETM_CHANNEL = 0x00,
ATSC_ETM_EVENT = 0x02,
};
/**
* atsc_ett_section structure.
*/
struct atsc_ett_section {
struct atsc_section_psip head;
EBIT3(uint32_t ETM_source_id :16; ,
uint32_t ETM_sub_id :14; ,
uint32_t ETM_type : 2; );
/* struct atsc_text extended_text_message */
} __ucsi_packed;
/**
* Process a atsc_ett_section.
*
* @param section Pointer to an atsc_section_psip structure.
* @return atsc_ett_section pointer, or NULL on error.
*/
struct atsc_ett_section *atsc_ett_section_codec(struct atsc_section_psip *section);
/**
* Accessor for the extended_text_message part of an atsc_ett_section.
*
* @param ett atsc_ett_section pointer.
* @return atsc_text pointer, or NULL on error.
*/
static inline struct atsc_text*
atsc_ett_section_extended_text_message(struct atsc_ett_section *ett)
{
int pos = sizeof(struct atsc_ett_section);
int len = section_ext_length(&ett->head.ext_head) - sizeof(struct atsc_ett_section);
if (len == 0)
return NULL;
return (struct atsc_text*)(((uint8_t*) ett) + pos);
}
/**
* Accessor for the extended_text_message part of an atsc_ett_section.
*
* @param ett atsc_ett_section pointer.
* @return The length.
*/
static inline int
atsc_ett_section_extended_text_message_length(struct atsc_ett_section *ett)
{
return section_ext_length(&ett->head.ext_head) - sizeof(struct atsc_ett_section);
}
#ifdef __cplusplus
}
#endif
#endif
|
