/usr/include/libucsi/dvb/nit_section.h is in dvb-apps 1.1.1+rev1500-1.1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /*
* 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_NIT_SECTION_H
#define _UCSI_DVB_NIT_SECTION_H 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/section.h>
/**
* dvb_nit_section structure.
*/
struct dvb_nit_section {
struct section_ext head;
EBIT2(uint16_t reserved_1 : 4; ,
uint16_t network_descriptors_length :12; );
/* struct descriptor descriptors[] */
/* struct dvb_nit_section_part2 part2 */
};
/**
* Second part of a dvb_nit_section, following the variable length descriptors field.
*/
struct dvb_nit_section_part2 {
EBIT2(uint16_t reserved_2 : 4; ,
uint16_t transport_stream_loop_length :12; );
/* struct dvb_nit_transport transports[] */
} __ucsi_packed;
/**
* An entry in the transports field of a dvb_nit_section_part2
*/
struct dvb_nit_transport {
uint16_t transport_stream_id;
uint16_t original_network_id;
EBIT2(uint16_t reserved : 4; ,
uint16_t transport_descriptors_length :12; );
/* struct descriptor descriptors[] */
} __ucsi_packed;
/**
* Process a dvb_nit_section.
*
* @param section Generic section_ext pointer.
* @return dvb_nit_section pointer, or NULL on error.
*/
struct dvb_nit_section * dvb_nit_section_codec(struct section_ext *section);
/**
* Accessor for the network_id field of a NIT.
*
* @param nit NIT pointer.
* @return The network_id.
*/
static inline uint16_t dvb_nit_section_network_id(struct dvb_nit_section *nit)
{
return nit->head.table_id_ext;
}
/**
* Iterator over the descriptors field in a dvb_nit_section.
*
* @param nit dvb_nit_section pointer.
* @param pos Variable containing a pointer to the current descriptor.
*/
#define dvb_nit_section_descriptors_for_each(nit, pos) \
for ((pos) = dvb_nit_section_descriptors_first(nit); \
(pos); \
(pos) = dvb_nit_section_descriptors_next(nit, pos))
/**
* Accessor for a pointer to the dvb_nit_section_part2 structure.
*
* @param nit dvb_nit_section pointer.
* @return dvb_nit_section_part2 pointer.
*/
static inline struct dvb_nit_section_part2 *dvb_nit_section_part2(struct dvb_nit_section * nit)
{
return (struct dvb_nit_section_part2 *)
((uint8_t*) nit + sizeof(struct dvb_nit_section) +
nit->network_descriptors_length);
}
/**
* Iterator over the transports field in a dvb_nit_section_part2.
*
* @param nit dvb_nit_section pointer.
* @param part2 dvb_nit_section_part2 pointer.
* @param pos Pointer to the current dvb_nit_transport.
*/
#define dvb_nit_section_transports_for_each(nit, part2, pos) \
for ((pos) = dvb_nit_section_transports_first(part2); \
(pos); \
(pos) = dvb_nit_section_transports_next(part2, pos))
/**
* Iterator over the descriptors field in a dvb_nit_transport.
*
* @param transport dvb_nit_transport pointer.
* @param pos Pointer to the current descriptor.
*/
#define dvb_nit_transport_descriptors_for_each(transport, pos) \
for ((pos) = dvb_nit_transport_descriptors_first(transport); \
(pos); \
(pos) = dvb_nit_transport_descriptors_next(transport, pos))
/******************************** PRIVATE CODE ********************************/
static inline struct descriptor *
dvb_nit_section_descriptors_first(struct dvb_nit_section * nit)
{
if (nit->network_descriptors_length == 0)
return NULL;
return (struct descriptor *)
((uint8_t *) nit + sizeof(struct dvb_nit_section));
}
static inline struct descriptor *
dvb_nit_section_descriptors_next(struct dvb_nit_section * nit,
struct descriptor* pos)
{
return next_descriptor((uint8_t*) nit + sizeof(struct dvb_nit_section),
nit->network_descriptors_length,
pos);
}
static inline struct dvb_nit_transport *
dvb_nit_section_transports_first(struct dvb_nit_section_part2 *part2)
{
if (part2->transport_stream_loop_length == 0)
return NULL;
return (struct dvb_nit_transport *)
((uint8_t *)part2 + sizeof(struct dvb_nit_section_part2));
}
static inline struct dvb_nit_transport *
dvb_nit_section_transports_next(struct dvb_nit_section_part2 *part2,
struct dvb_nit_transport *pos)
{
uint8_t *end = (uint8_t*) part2 + sizeof(struct dvb_nit_section_part2) +
part2->transport_stream_loop_length;
uint8_t *next = (uint8_t*) pos + sizeof(struct dvb_nit_transport) +
pos->transport_descriptors_length;
if (next >= end)
return NULL;
return (struct dvb_nit_transport *) next;
}
static inline struct descriptor *
dvb_nit_transport_descriptors_first(struct dvb_nit_transport *t)
{
if (t->transport_descriptors_length == 0)
return NULL;
return (struct descriptor *)
((uint8_t*) t + sizeof(struct dvb_nit_transport));
}
static inline struct descriptor *
dvb_nit_transport_descriptors_next(struct dvb_nit_transport *t,
struct descriptor* pos)
{
return next_descriptor((uint8_t*) t + sizeof(struct dvb_nit_transport),
t->transport_descriptors_length,
pos);
}
#ifdef __cplusplus
}
#endif
#endif
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