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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* 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_DVB_AIT_APPLICATION_DESCRIPTOR
#define _UCSI_DVB_AIT_APPLICATION_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* Possible values for the visibility field.
*/
enum {
AVB_AIT_APPLICATION_VISIBILITY_HIDDEN = 0x00,
AVB_AIT_APPLICATION_VISIBILITY_APPSONLY = 0x01,
AVB_AIT_APPLICATION_VISIBILITY_VISIBLE = 0x03
};
/**
* dvb_ait_application_descriptor structure.
*/
struct dvb_ait_application_descriptor {
struct descriptor d;
uint8_t application_profiles_length;
/* struct dvb_ait_application_profile profiles [] */
/* struct dvb_ait_application_descriptor_part2 part2 */
} __ucsi_packed;
/**
* An entry in the profiles field of a dvb_ait_application_descriptor.
*/
struct dvb_ait_application_profile {
uint16_t application_profile;
uint8_t version_major;
uint8_t version_minor;
uint8_t version_micro;
} __ucsi_packed;
/**
* Second part of a dvb_ait_application_descriptor structure.
*/
struct dvb_ait_application_descriptor_part2 {
EBIT3(uint8_t service_bound_flag : 1; ,
uint8_t visibility : 2; ,
uint8_t reserved : 5; )
uint8_t application_priority;
/* uint8_t transport_protocol_label[] */
} __ucsi_packed;
/**
* Process a dvb_ait_application_descriptor.
*
* @param d Generic descriptor pointer.
* @return dvb_ait_application_descriptor pointer, or NULL on error.
*/
static inline struct dvb_ait_application_descriptor*
dvb_ait_application_descriptor_codec(struct descriptor* d)
{
uint32_t pos = 0;
uint32_t pos2 = 0;
uint32_t len = d->len + 2;
uint8_t* buf = (uint8_t*) d;
struct dvb_ait_application_descriptor *ret =
(struct dvb_ait_application_descriptor*) d;
if (len < sizeof(struct dvb_ait_application_descriptor))
return NULL;
if (len < (sizeof(struct dvb_ait_application_descriptor) + ret->application_profiles_length))
return NULL;
if (ret->application_profiles_length % sizeof(struct dvb_ait_application_profile))
return NULL;
pos += sizeof(struct dvb_ait_application_descriptor);
pos2 = 0;
while(pos2 < ret->application_profiles_length) {
bswap16(buf + pos + pos2);
pos2 += sizeof(struct dvb_ait_application_descriptor);
}
pos += pos2;
if (len < (pos + sizeof(struct dvb_ait_application_descriptor_part2)))
return NULL;
return ret;
}
/**
* Iterator for the profiles field of a dvb_ait_application_descriptor.
*
* @param d dvb_ait_application_descriptor pointer.
* @param pos Variable containing a pointer to the current dvb_ait_application_profile.
*/
#define dvb_ait_application_descriptor_profiles_for_each(d, pos) \
for ((pos) = dvb_ait_application_descriptor_profiles_first(d); \
(pos); \
(pos) = dvb_ait_application_descriptor_profiles_next(d, pos))
/**
* Accessor for the part2 field of a dvb_ait_application_descriptor.
*
* @param d dvb_ait_application_descriptor pointer.
* @return dvb_ait_application_descriptor_part2 pointer.
*/
static inline struct dvb_ait_application_descriptor_part2*
dvb_ait_application_descriptor_part2(struct dvb_ait_application_descriptor* d)
{
return (struct dvb_ait_application_descriptor_part2*)
((uint8_t*) d +
sizeof(struct dvb_ait_application_descriptor) +
d->application_profiles_length);
}
/**
* Accessor for the transport_protocol_label field of a dvb_ait_application_descriptor_part2.
*
* @param d dvb_ait_application_descriptor_part2 pointer.
* @return Pointer to the field.
*/
static inline uint8_t*
dvb_ait_application_descriptor_part2_transport_protocol_label(struct dvb_ait_application_descriptor_part2* d)
{
return (uint8_t*) d +
sizeof(struct dvb_ait_application_descriptor_part2);
}
/**
* Calculate the number of bytes in the transport_protocol_label field of a dvb_ait_application_descriptor_part2.
*
* @param d dvb_ait_application_descriptor pointer.
* @param part2 dvb_ait_application_descriptor_part2 pointer.
* @return Number of bytes.
*/
static inline int
dvb_ait_application_descriptor_part2_transport_protocol_label_length(struct dvb_ait_application_descriptor *d,
struct dvb_ait_application_descriptor_part2* part2)
{
uint8_t *ptr = (uint8_t*) part2 + sizeof(struct dvb_ait_application_descriptor_part2);
uint8_t *end = (uint8_t*) d + d->d.len + 2;
return (int) (end - ptr);
}
/******************************** PRIVATE CODE ********************************/
static inline struct dvb_ait_application_profile*
dvb_ait_application_descriptor_profiles_first(struct dvb_ait_application_descriptor *d)
{
if (d->application_profiles_length == 0)
return NULL;
return (struct dvb_ait_application_profile *)
((uint8_t*) d + sizeof(struct dvb_ait_application_descriptor));
}
static inline struct dvb_ait_application_profile*
dvb_ait_application_descriptor_profiles_next(struct dvb_ait_application_descriptor *d,
struct dvb_ait_application_profile *pos)
{
uint8_t *end = (uint8_t*) d +
sizeof(struct dvb_ait_application_descriptor) +
d->application_profiles_length;
uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_ait_application_profile);
if (next >= end)
return NULL;
return (struct dvb_ait_application_profile *) next;
}
#ifdef __cplusplus
}
#endif
#endif
|
