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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
|
/*
* 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_MOSAIC_DESCRIPTOR
#define _UCSI_DVB_MOSAIC_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* dvb_mosaic_descriptor structure.
*/
struct dvb_mosaic_descriptor {
struct descriptor d;
EBIT4(uint8_t mosaic_entry_point : 1; ,
uint8_t number_of_horiz_elementary_cells: 3; ,
uint8_t reserved : 1; ,
uint8_t number_of_vert_elementary_cells : 3; );
/* struct dvb_mosaic_info infos[] */
} __ucsi_packed;
/**
* An entry in the infos field of a dvb_mosaic_descriptor.
*/
struct dvb_mosaic_info {
EBIT3(uint16_t logical_cell_id : 6; ,
uint16_t reserved : 7; ,
uint16_t logical_cell_presentation_info : 3; );
uint8_t elementary_cell_field_length;
/* struct dvb_mosaic_elementary_cell_field fields[] */
/* struct dvb_mosaic_info_part2 part2 */
/* struct dvb_mosaic_linkage linkage */
} __ucsi_packed;
/**
* An entry in the fields field of a dvb_mosaic_info.
*/
struct dvb_mosaic_elementary_cell_field {
EBIT2(uint8_t reserved : 2; ,
uint8_t elementary_cell_id : 6; );
} __ucsi_packed;
/**
* Part2 of dvb_mosaic_info, following the variable length fields field.
*/
struct dvb_mosaic_info_part2 {
uint8_t cell_linkage_info;
} __ucsi_packed;
struct dvb_mosaic_linkage_01 {
uint16_t bouquet_id;
} __ucsi_packed;
struct dvb_mosaic_linkage_02 {
uint16_t original_network_id;
uint16_t transport_stream_id;
uint16_t service_id;
} __ucsi_packed;
struct dvb_mosaic_linkage_03 {
uint16_t original_network_id;
uint16_t transport_stream_id;
uint16_t service_id;
} __ucsi_packed;
struct dvb_mosaic_linkage_04 {
uint16_t original_network_id;
uint16_t transport_stream_id;
uint16_t service_id;
uint16_t event_id;
} __ucsi_packed;
/**
* Structure describing the linkage field of a dvb_mosaic_info
*/
struct dvb_mosaic_linkage {
union {
struct dvb_mosaic_linkage_01 linkage_01;
struct dvb_mosaic_linkage_02 linkage_02;
struct dvb_mosaic_linkage_03 linkage_03;
struct dvb_mosaic_linkage_04 linkage_04;
} u;
} __ucsi_packed;
/**
* Process a dvb_mosaic_descriptor.
*
* @param d Pointer to a generic descriptor structure.
*/
static inline struct dvb_mosaic_descriptor*
dvb_mosaic_descriptor_codec(struct descriptor* d)
{
uint8_t* buf = (uint8_t*) d + 2;
uint32_t pos = 0;
uint32_t len = d->len;
struct dvb_mosaic_descriptor * p =
(struct dvb_mosaic_descriptor *) d;
pos += (sizeof(struct dvb_mosaic_descriptor) - 2);
if (pos > len)
return NULL;
while(pos < len) {
struct dvb_mosaic_info *e =
(struct dvb_mosaic_info*) (buf+pos);
struct dvb_mosaic_info_part2 *e2;
struct dvb_mosaic_linkage *linkage;
if ((pos + sizeof(struct dvb_mosaic_info)) > len)
return NULL;
bswap16(buf + pos);
pos += sizeof(struct dvb_mosaic_info) +
e->elementary_cell_field_length;
if (pos > len)
return NULL;
e2 = (struct dvb_mosaic_info_part2*) (buf+pos);
pos += sizeof(struct dvb_mosaic_info_part2);
if (pos > len)
return NULL;
linkage = (struct dvb_mosaic_linkage*) (buf+pos);
switch(e2->cell_linkage_info) {
case 0x01:
if ((pos + sizeof(struct dvb_mosaic_linkage_01)) > len)
return NULL;
bswap16(buf+pos);
pos += sizeof(struct dvb_mosaic_linkage_01);
break;
case 0x02:
if ((pos + sizeof(struct dvb_mosaic_linkage_02)) > len)
return NULL;
bswap16(buf+pos);
bswap16(buf+pos+2);
bswap16(buf+pos+4);
pos += sizeof(struct dvb_mosaic_linkage_02);
break;
case 0x03:
if ((pos + sizeof(struct dvb_mosaic_linkage_03)) > len)
return NULL;
bswap16(buf+pos);
bswap16(buf+pos+2);
bswap16(buf+pos+4);
pos += sizeof(struct dvb_mosaic_linkage_03);
break;
case 0x04:
if ((pos + sizeof(struct dvb_mosaic_linkage_04)) > len)
return NULL;
bswap16(buf+pos);
bswap16(buf+pos+2);
bswap16(buf+pos+4);
bswap16(buf+pos+6);
pos += sizeof(struct dvb_mosaic_linkage_04);
break;
}
}
return p;
}
/**
* Iterator over the infos field of a dvb_mosaic_descriptor.
*
* @param d dvb_mosaic_descriptor pointer.
* @param pos Variable containing a pointer to the current dvb_mosaic_info.
*/
#define dvb_mosaic_descriptor_infos_for_each(d, pos) \
for ((pos) = dvb_mosaic_descriptor_infos_first(d); \
(pos); \
(pos) = dvb_mosaic_descriptor_infos_next(d, pos))
/**
* Iterator over the fields field of a dvb_mosaic_info.
*
* @param info dvb_mosaic_info pointer.
* @param pos Variable containing a pointer to the current dvb_mosaic_elementary_cell_field.
*/
#define dvb_mosaic_info_fields_for_each(info, pos) \
for ((pos) = dvb_mosaic_info_fields_first(info); \
(pos); \
(pos) = dvb_mosaic_info_fields_next(info, pos))
/**
* Accessor for the second part of the dvb_mosaic_info structure.
*
* @param entry dvb_mosaic_info pointer.
* @return dvb_mosaic_info_part2 pointer.
*/
static inline struct dvb_mosaic_info_part2*
dvb_mosaic_info_part2(struct dvb_mosaic_info* entry)
{
return (struct dvb_mosaic_info_part2*)
((uint8_t*) entry + sizeof(struct dvb_mosaic_info) +
entry->elementary_cell_field_length);
}
/**
* Accessor for the linkage field a dvb_mosaic_info structure.
*
* @param entry dvb_mosaic_info_part2 pointer.
* @return dvb_mosaic_linkage pointer, or NULL on error.
*/
static inline struct dvb_mosaic_linkage*
dvb_mosaic_linkage(struct dvb_mosaic_info_part2* entry)
{
if ((entry->cell_linkage_info != 0x01) &&
(entry->cell_linkage_info != 0x02) &&
(entry->cell_linkage_info != 0x03) &&
(entry->cell_linkage_info != 0x04))
return NULL;
return (struct dvb_mosaic_linkage*)
((uint8_t*) entry + sizeof(struct dvb_mosaic_info_part2));
}
/******************************** PRIVATE CODE ********************************/
static inline struct dvb_mosaic_info*
dvb_mosaic_descriptor_infos_first(struct dvb_mosaic_descriptor *d)
{
if (d->d.len == 1)
return NULL;
return (struct dvb_mosaic_info *)
((uint8_t*) d + sizeof(struct dvb_mosaic_descriptor));
}
static inline struct dvb_mosaic_info*
dvb_mosaic_descriptor_infos_next(struct dvb_mosaic_descriptor *d,
struct dvb_mosaic_info *pos)
{
struct dvb_mosaic_info_part2* part2 = dvb_mosaic_info_part2(pos);
uint8_t *end = (uint8_t*) d + 2 + d->d.len;
uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_mosaic_info) +
pos->elementary_cell_field_length +
sizeof(struct dvb_mosaic_info_part2);
if (part2->cell_linkage_info == 0x01)
next += sizeof(struct dvb_mosaic_linkage_01);
else if (part2->cell_linkage_info == 0x02)
next += sizeof(struct dvb_mosaic_linkage_02);
else if (part2->cell_linkage_info == 0x03)
next += sizeof(struct dvb_mosaic_linkage_03);
else if (part2->cell_linkage_info == 0x04)
next += sizeof(struct dvb_mosaic_linkage_04);
if (next >= end)
return NULL;
return (struct dvb_mosaic_info *) next;
}
static inline struct dvb_mosaic_elementary_cell_field*
dvb_mosaic_info_fields_first(struct dvb_mosaic_info *d)
{
if (d->elementary_cell_field_length == 0)
return NULL;
return (struct dvb_mosaic_elementary_cell_field*)
((uint8_t*) d + sizeof(struct dvb_mosaic_info));
}
static inline struct dvb_mosaic_elementary_cell_field*
dvb_mosaic_info_fields_next(struct dvb_mosaic_info *d,
struct dvb_mosaic_elementary_cell_field* pos)
{
uint8_t *end = (uint8_t*) d + sizeof(struct dvb_mosaic_info) +
d->elementary_cell_field_length;
uint8_t *next = (uint8_t *) pos +
sizeof(struct dvb_mosaic_elementary_cell_field);
if (next >= end)
return NULL;
return (struct dvb_mosaic_elementary_cell_field *) next;
}
#ifdef __cplusplus
}
#endif
#endif
|