1 /* 2 * Copyright (c) 2013 - Andre Roth <neolynx@gmail.com> 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU Lesser General Public License as published by 6 * the Free Software Foundation version 2.1 of the License. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU Lesser General Public License for more details. 12 * 13 * You should have received a copy of the GNU Lesser General Public License 14 * along with this program; if not, write to the Free Software 15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 16 * Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html 17 * 18 * Described at ETSI EN 300 468 V1.11.1 (2010-04) 19 */ 20 21 /** 22 * @file desc_ca.h 23 * @ingroup descriptors 24 * @brief Provides the descriptors for Conditional Access 25 * @copyright GNU Lesser General Public License version 2.1 (LGPLv2.1) 26 * @author Andre Roth 27 * 28 * @par Relevant specs 29 * The descriptor described herein is defined at: 30 * - ETSI EN 300 468 V1.11.1 (2010-04) 31 * 32 * @see http://www.etherguidesystems.com/help/sdos/mpeg/semantics/mpeg-2/descriptors/CA_descriptor.aspx 33 * 34 * @par Bug Report 35 * Please submit bug reports and patches to linux-media@vger.kernel.org 36 */ 37 38 module libdvbv5_d.desc_ca; 39 40 import libdvbv5_d.descriptors: dvb_desc; 41 import libdvbv5_d.dvb_fe: dvb_v5_fe_parms; 42 43 extern (C): 44 45 /** 46 * @struct dvb_desc_ca 47 * @ingroup descriptors 48 * @brief Contains the private data for Conditional Access 49 * 50 * @param type descriptor tag 51 * @param length descriptor length 52 * @param next pointer to struct dvb_desc 53 * @param ca_id Conditional Access ID 54 * @param ca_pid Conditional Access ID 55 * @param privdata pointer to private data buffer 56 * @param privdata_len length of the private data 57 */ 58 struct dvb_desc_ca 59 { 60 align (1): 61 62 ubyte type; 63 ubyte length; 64 dvb_desc* next; 65 66 ushort ca_id; 67 68 union 69 { 70 align (1): 71 72 ushort bitfield1; 73 74 struct 75 { 76 import std.bitmanip : bitfields; 77 align (1): 78 79 mixin(bitfields!( 80 ushort, "ca_pid", 13, 81 ushort, "reserved", 3)); 82 } 83 } 84 85 ubyte* privdata; 86 ubyte privdata_len; 87 } 88 89 // struct dvb_v5_fe_parms; 90 91 /** @brief initial descriptor field at dvb_desc_ca struct */ 92 // enum dvb_desc_ca_field_first = ca_id; 93 /** @brief last descriptor field at dvb_desc_ca struct */ 94 // enum dvb_desc_ca_field_last = privdata; 95 96 /** 97 * @brief Initializes and parses the CA descriptor 98 * @ingroup descriptors 99 * 100 * @param parms struct dvb_v5_fe_parms pointer to the opened device 101 * @param buf buffer containing the descriptor's raw data 102 * @param desc pointer to struct dvb_desc to be allocated and filled 103 * 104 * This function allocates a the descriptor and fills the fields inside 105 * the struct. It also makes sure that all fields will follow the CPU 106 * endianness. Due to that, the content of the buffer may change. 107 * 108 * @return On success, it returns the size of the allocated struct. 109 * A negative value indicates an error. 110 */ 111 int dvb_desc_ca_init ( 112 dvb_v5_fe_parms* parms, 113 const(ubyte)* buf, 114 dvb_desc* desc); 115 116 /** 117 * @brief Prints the content of the CA descriptor 118 * @ingroup descriptors 119 * 120 * @param parms struct dvb_v5_fe_parms pointer to the opened device 121 * @param desc pointer to struct dvb_desc 122 */ 123 void dvb_desc_ca_print (dvb_v5_fe_parms* parms, const(dvb_desc)* desc); 124 125 /** 126 * @brief Frees all data allocated by the CA descriptor 127 * @ingroup descriptors 128 * 129 * @param desc pointer to struct dvb_desc to be freed 130 */ 131 void dvb_desc_ca_free (dvb_desc* desc);