/usr/include/libucsi/dvb/vbi_data_descriptor.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 | /*
* 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_VBI_DATA_DESCRIPTOR
#define _UCSI_DVB_VBI_DATA_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* Possible values for the data_service_id field.
*/
enum {
DVB_VBI_DATA_SERVICE_ID_EBU = 0x01,
DVB_VBI_DATA_SERVICE_ID_INVERTED = 0x02,
DVB_VBI_DATA_SERVICE_ID_VPS = 0x04,
DVB_VBI_DATA_SERVICE_ID_WSS = 0x05,
DVB_VBI_DATA_SERVICE_ID_CC = 0x06,
DVB_VBI_DATA_SERVICE_ID_MONO_422 = 0x07,
};
/**
* dvb_vbi_data_descriptor structure
*/
struct dvb_vbi_data_descriptor {
struct descriptor d;
/* struct dvb_vbi_data_entry entries[] */
} __ucsi_packed;
/**
* An entry in the dvb_vbi_data_descriptor entries field.
*/
struct dvb_vbi_data_entry {
uint8_t data_service_id;
uint8_t data_length;
/* uint8_t data[] */
} __ucsi_packed;
/**
* Format of the dvb_vbi_data_entry data field, if data_service_id == 1,2,4,5,6,7.
*/
struct dvb_vbi_data_x {
EBIT3(uint8_t reserved : 2; ,
uint8_t field_parity : 1; ,
uint8_t line_offset : 5; );
} __ucsi_packed;
/**
* Process a dvb_vbi_data_descriptor.
*
* @param d Generic descriptor structure.
* @return dvb_vbi_data_descriptor pointer, or NULL on error.
*/
static inline struct dvb_vbi_data_descriptor*
dvb_vbi_data_descriptor_codec(struct descriptor* d)
{
uint8_t* p = (uint8_t*) d + 2;
uint32_t pos = 0;
uint32_t len = d->len;
while(pos < len) {
struct dvb_vbi_data_entry *e =
(struct dvb_vbi_data_entry*) (p+pos);
pos += sizeof(struct dvb_vbi_data_entry);
if (pos > len)
return NULL;
pos += e->data_length;
if (pos > len)
return NULL;
}
return (struct dvb_vbi_data_descriptor*) d;
}
/**
* Iterator for entries field in a dvb_vbi_data_descriptor structure.
*
* @param d Pointer to dvb_vbi_data_descriptor structure.
* @param pos Variable holding pointer to the current dvb_vbi_data_entry structure.
*/
#define dvb_vbi_data_descriptor_entries_for_each(d, pos) \
for ((pos) = dvb_vbi_data_descriptor_entries_first(d); \
(pos); \
(pos) = dvb_vbi_data_descriptor_entries_next(d, pos))
/**
* Get a pointer to the data field of a dvb_vbi_data_entry.
*
* @param d dvb_vbi_data_entry structure.
* @return Pointer to the data field.
*/
static inline uint8_t *
dvb_vbi_data_entry_data(struct dvb_vbi_data_entry *d)
{
return (uint8_t *) d + sizeof(struct dvb_vbi_data_entry);
}
/**
* Get a pointer to the data field of a dvb_vbi_data_x for id 1,2,4,5,6,7.
*
* @param d dvb_vbi_data_entry structure.
* @return Pointer to the data field, or NULL if invalid
*/
static inline struct dvb_vbi_data_x*
dvb_vbi_data_entry_data_x(struct dvb_vbi_data_entry *d)
{
switch(d->data_service_id) {
case 1:
case 2:
case 4:
case 5:
case 6:
case 7:
return (struct dvb_vbi_data_x*) ((uint8_t *) d + sizeof(struct dvb_vbi_data_entry));
}
return NULL;
}
/******************************** PRIVATE CODE ********************************/
static inline struct dvb_vbi_data_entry*
dvb_vbi_data_descriptor_entries_first(struct dvb_vbi_data_descriptor *d)
{
if (d->d.len == 0)
return NULL;
return (struct dvb_vbi_data_entry *)
((uint8_t*) d + sizeof(struct dvb_vbi_data_descriptor));
}
static inline struct dvb_vbi_data_entry*
dvb_vbi_data_descriptor_entries_next(struct dvb_vbi_data_descriptor *d,
struct dvb_vbi_data_entry *pos)
{
uint8_t *end = (uint8_t*) d + 2 + d->d.len;
uint8_t *next = (uint8_t *) pos + sizeof(struct dvb_vbi_data_entry) +
pos->data_length;
if (next >= end)
return NULL;
return (struct dvb_vbi_data_entry *) next;
}
#ifdef __cplusplus
}
#endif
#endif
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