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
|
/*
* 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_CELL_FREQUENCY_LINK_DESCRIPTOR
#define _UCSI_DVB_CELL_FREQUENCY_LINK_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* dvb_cell_frequency_link_descriptor structure.
*/
struct dvb_cell_frequency_link_descriptor {
struct descriptor d;
/* struct dvb_cell_frequency_link_cell cells[] */
} __ucsi_packed;
/**
* An entry in the cells field of a dvb_cell_frequency_link_descriptor.
*/
struct dvb_cell_frequency_link_cell {
uint16_t cell_id;
uint32_t frequency;
uint8_t subcell_loop_info_length;
/* struct dvb_cell_frequency_link_subcell subcells[] */
} __ucsi_packed;
/**
* An entry in the subcells field of a dvb_cell_frequency_link_cell.
*/
struct dvb_cell_frequency_link_cell_subcell {
uint8_t cell_id_extension;
uint32_t transposer_frequency;
} __ucsi_packed;
/**
* Process a dvb_cell_frequency_link_descriptor.
*
* @param d Generic descriptor pointer.
* @return dvb_cell_frequency_link_descriptor pointer, or NULL on error.
*/
static inline struct dvb_cell_frequency_link_descriptor*
dvb_cell_frequency_link_descriptor_codec(struct descriptor* d)
{
uint32_t pos = 0;
uint32_t pos2 = 0;
uint8_t* buf = (uint8_t*) d + 2;
uint32_t len = d->len;
while(pos < len) {
struct dvb_cell_frequency_link_cell *e =
(struct dvb_cell_frequency_link_cell*) (buf+pos);
if ((pos + sizeof(struct dvb_cell_frequency_link_cell)) > len)
return NULL;
bswap16(buf+pos);
bswap32(buf+pos+2);
pos += sizeof(struct dvb_cell_frequency_link_cell);
if ((pos + e->subcell_loop_info_length) > len)
return NULL;
if (e->subcell_loop_info_length % sizeof(struct dvb_cell_frequency_link_cell_subcell))
return NULL;
pos2 = 0;
while(pos2 < e->subcell_loop_info_length) {
bswap32(buf+pos+pos2+1);
pos2 += sizeof(struct dvb_cell_frequency_link_cell_subcell);
}
pos += e->subcell_loop_info_length;
}
return (struct dvb_cell_frequency_link_descriptor*) d;
}
/**
* Iterator for the cells field of a dvb_cell_frequency_link_descriptor.
*
* @param d dvb_cell_frequency_link_descriptor pointer.
* @param pos Variable holding a pointer to the current dvb_cell_frequency_link_cell.
*/
#define dvb_cell_frequency_link_descriptor_cells_for_each(d, pos) \
for ((pos) = dvb_cell_frequency_link_descriptor_cells_first(d); \
(pos); \
(pos) = dvb_cell_frequency_link_descriptor_cells_next(d, pos))
/**
* Iterator for the subcells field of a dvb_cell_frequency_link_cell.
*
* @param cell dvb_cell_frequency_link_cell pointer.
* @param pos Variable holding a pointer to the current dvb_cell_frequency_link_cell_subcell.
*/
#define dvb_cell_frequency_link_cell_subcells_for_each(cell, pos) \
for ((pos) = dvb_cell_frequency_link_cell_subcells_first(cell); \
(pos); \
(pos) = dvb_cell_frequency_link_cell_subcells_next(cell, pos))
/******************************** PRIVATE CODE ********************************/
static inline struct dvb_cell_frequency_link_cell*
dvb_cell_frequency_link_descriptor_cells_first(struct dvb_cell_frequency_link_descriptor *d)
{
if (d->d.len == 0)
return NULL;
return (struct dvb_cell_frequency_link_cell *)
((uint8_t*) d + sizeof(struct dvb_cell_frequency_link_descriptor));
}
static inline struct dvb_cell_frequency_link_cell*
dvb_cell_frequency_link_descriptor_cells_next(struct dvb_cell_frequency_link_descriptor *d,
struct dvb_cell_frequency_link_cell *pos)
{
uint8_t *end = (uint8_t*) d + 2 + d->d.len;
uint8_t *next = (uint8_t *) pos +
sizeof(struct dvb_cell_frequency_link_cell) +
pos->subcell_loop_info_length;
if (next >= end)
return NULL;
return (struct dvb_cell_frequency_link_cell *) next;
}
static inline struct dvb_cell_frequency_link_cell_subcell*
dvb_cell_frequency_link_cell_subcells_first(struct dvb_cell_frequency_link_cell *d)
{
if (d->subcell_loop_info_length == 0)
return NULL;
return (struct dvb_cell_frequency_link_cell_subcell*)
((uint8_t*) d + sizeof(struct dvb_cell_frequency_link_cell));
}
static inline struct dvb_cell_frequency_link_cell_subcell*
dvb_cell_frequency_link_cell_subcells_next(struct dvb_cell_frequency_link_cell *cell,
struct dvb_cell_frequency_link_cell_subcell *pos)
{
uint8_t *end = (uint8_t*) cell + cell->subcell_loop_info_length;
uint8_t *next = (uint8_t*) pos +
sizeof(struct dvb_cell_frequency_link_cell_subcell);
if (next >= end)
return NULL;
return (struct dvb_cell_frequency_link_cell_subcell *) next;
}
#ifdef __cplusplus
}
#endif
#endif
|
