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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/*****************************************************************************
* desc_46.h: ETSI EN 300 468 Descriptor 0x46: VBI teletext descriptor
*****************************************************************************
* Copyright (C) 2009-2010 VideoLAN
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Georgi Chorbadzhiyski <georgi@unixsol.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject
* to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*****************************************************************************/
/*
* Normative references:
* - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
*/
#ifndef __BITSTREAM_DVB_DESC_46_H__
#define __BITSTREAM_DVB_DESC_46_H__
#include <bitstream/common.h>
#include <bitstream/mpeg/psi/descriptors.h>
#include <bitstream/mpeg/psi/desc_0a.h>
#ifdef __cplusplus
extern "C"
{
#endif
/*****************************************************************************
* Descriptor 0x46: VBI teletext descriptor
*****************************************************************************/
#define DESC46_HEADER_SIZE DESC_HEADER_SIZE
#define DESC46_LANGUAGE_SIZE 5
static inline void desc46_init(uint8_t *p_desc)
{
desc_set_tag(p_desc, 0x46);
}
static inline uint8_t *desc46_get_language(uint8_t *p_desc, uint8_t n)
{
uint8_t *p_desc_n = p_desc + DESC46_HEADER_SIZE + n * DESC46_LANGUAGE_SIZE;
if (p_desc_n + DESC46_LANGUAGE_SIZE - p_desc
> desc_get_length(p_desc) + DESC46_HEADER_SIZE)
return NULL;
return p_desc_n;
}
#define desc46n_set_code desc0an_set_code
#define desc46n_get_code desc0an_get_code
static inline void desc46n_set_teletexttype(uint8_t *p_desc_n, uint8_t i_type)
{
p_desc_n[3] &= ~0xf8;
p_desc_n[3] |= (i_type << 3) & 0xf8;
}
static inline uint8_t desc46n_get_teletexttype(const uint8_t *p_desc_n)
{
return p_desc_n[3] >> 3;
}
static inline char *desc46_get_teletexttype_txt(uint8_t i_type)
{
return i_type == 0x00 ? "Reserved" :
i_type == 0x01 ? "Initial teletext page" :
i_type == 0x02 ? "Teletext subtitle page" :
i_type == 0x03 ? "Additional information page" :
i_type == 0x04 ? "Programme schedule page" :
i_type == 0x05 ? "Teletext subtitle page for hearing impaired people schedule page" : "Reserved";
}
static inline void desc46n_set_teletextmagazine(uint8_t *p_desc_n,
uint8_t i_magazine)
{
p_desc_n[3] &= ~0x7;
p_desc_n[3] |= (i_magazine & 0x7);
}
static inline uint8_t desc46n_get_teletextmagazine(const uint8_t *p_desc_n)
{
return p_desc_n[3] & 0x7;
}
static inline void desc46n_set_teletextpage(uint8_t *p_desc_n, uint8_t i_page)
{
p_desc_n[4] = i_page;
}
static inline uint8_t desc46n_get_teletextpage(const uint8_t *p_desc_n)
{
return p_desc_n[4];
}
static inline bool desc46_validate(const uint8_t *p_desc)
{
return !(desc_get_length(p_desc) % DESC46_LANGUAGE_SIZE);
}
static inline void desc46_print(uint8_t *p_desc, f_print pf_print,
void *opaque, print_type_t i_print_type)
{
uint8_t j = 0;
uint8_t *p_desc_n;
while ((p_desc_n = desc46_get_language(p_desc, j)) != NULL) {
j++;
switch (i_print_type) {
case PRINT_XML:
pf_print(opaque,
"<%s language=\"%3.3s\" type=\"0x%hhx\" type_txt=\"%s\" mag=\"%hhu\" page=\"0x%hhux\"/>",
desc_get_tag(p_desc) == 0x46 ? "VBI_TELX_DESC" : "TELX_DESC",
(const char *)desc46n_get_code(p_desc_n),
desc46n_get_teletexttype(p_desc_n),
desc46_get_teletexttype_txt(desc46n_get_teletexttype(p_desc_n)),
desc46n_get_teletextmagazine(p_desc_n),
desc46n_get_teletextpage(p_desc_n));
break;
default:
pf_print(opaque,
" - desc %x %s language=%3.3s type=0x%hhx type_txt=\"%s\" mag=%hhu page=0x%hhux",
desc_get_tag(p_desc),
desc_get_tag(p_desc) == 0x46 ? "vbi_telx" : "telx",
(const char *)desc46n_get_code(p_desc_n),
desc46n_get_teletexttype(p_desc_n),
desc46_get_teletexttype_txt(desc46n_get_teletexttype(p_desc_n)),
desc46n_get_teletextmagazine(p_desc_n),
desc46n_get_teletextpage(p_desc_n));
}
}
}
#ifdef __cplusplus
}
#endif
#endif