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
|
/*
* Copyright (c) 2013 - Andre Roth <neolynx@gmail.com>
*
* This program 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 version 2.1 of the License.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* Described at ETSI EN 300 468 V1.11.1 (2010-04)
*/
/**
* @file desc_ca.h
* @ingroup descriptors
* @brief Provides the descriptors for Conditional Access
* @copyright GNU Lesser General Public License version 2.1 (LGPLv2.1)
* @author Andre Roth
*
* @par Relevant specs
* The descriptor described herein is defined at:
* - ETSI EN 300 468 V1.11.1 (2010-04)
*
* @see http://www.etherguidesystems.com/help/sdos/mpeg/semantics/mpeg-2/descriptors/CA_descriptor.aspx
*
* @par Bug Report
* Please submit bug reports and patches to linux-media@vger.kernel.org
*/
#ifndef _CA_H
#define _CA_H
#include <libdvbv5/descriptors.h>
/**
* @struct dvb_desc_ca
* @ingroup descriptors
* @brief Contains the private data for Conditional Access
*
* @param type descriptor tag
* @param length descriptor length
* @param next pointer to struct dvb_desc
* @param ca_id Conditional Access ID
* @param ca_pid Conditional Access ID
* @param privdata pointer to private data buffer
* @param privdata_len length of the private data
*/
struct dvb_desc_ca {
uint8_t type;
uint8_t length;
struct dvb_desc *next;
uint16_t ca_id;
union {
uint16_t bitfield1;
struct {
uint16_t ca_pid:13;
uint16_t reserved:3;
} __attribute__((packed));
} __attribute__((packed));
uint8_t *privdata;
uint8_t privdata_len;
} __attribute__((packed));
struct dvb_v5_fe_parms;
/** @brief initial descriptor field at dvb_desc_ca struct */
#define dvb_desc_ca_field_first ca_id
/** @brief last descriptor field at dvb_desc_ca struct */
#define dvb_desc_ca_field_last privdata
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Initializes and parses the CA descriptor
* @ingroup descriptors
*
* @param parms struct dvb_v5_fe_parms pointer to the opened device
* @param buf buffer containing the descriptor's raw data
* @param desc pointer to struct dvb_desc to be allocated and filled
*
* This function allocates a the descriptor and fills the fields inside
* the struct. It also makes sure that all fields will follow the CPU
* endianness. Due to that, the content of the buffer may change.
*
* @return On success, it returns the size of the allocated struct.
* A negative value indicates an error.
*/
int dvb_desc_ca_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
struct dvb_desc *desc);
/**
* @brief Prints the content of the CA descriptor
* @ingroup descriptors
*
* @param parms struct dvb_v5_fe_parms pointer to the opened device
* @param desc pointer to struct dvb_desc
*/
void dvb_desc_ca_print(struct dvb_v5_fe_parms *parms,
const struct dvb_desc *desc);
/**
* @brief Frees all data allocated by the CA descriptor
* @ingroup descriptors
*
* @param desc pointer to struct dvb_desc to be freed
*/
void dvb_desc_ca_free(struct dvb_desc *desc);
#ifdef __cplusplus
}
#endif
#endif
|
