1 /* 2 * Copyright (c) 2011-2012 - Mauro Carvalho Chehab 3 * Copyright (c) 2012 - Andre Roth <neolynx@gmail.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU Lesser General Public License as published by 7 * the Free Software Foundation version 2.1 of the License. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 * Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html 18 * 19 * Based on ETSI EN 300 468 V1.11.1 (2010-04) 20 * 21 */ 22 23 /** 24 * @file desc_terrestrial_delivery.h 25 * @ingroup descriptors 26 * @brief Provides the descriptors for the DVB-T terrestrial delivery system descriptor 27 * @copyright GNU Lesser General Public License version 2.1 (LGPLv2.1) 28 * @author Mauro Carvalho Chehab 29 * @author Andre Roth 30 * 31 * @par Relevant specs 32 * The descriptor described herein is defined at: 33 * - ETSI EN 300 468 V1.11.1 34 * 35 * @par Bug Report 36 * Please submit bug reports and patches to linux-media@vger.kernel.org 37 */ 38 39 module libdvbv5_d.desc_terrestrial_delivery; 40 41 import libdvbv5_d.descriptors: dvb_desc; 42 import libdvbv5_d.dvb_fe: dvb_v5_fe_parms; 43 44 extern (C): 45 46 /** 47 * @struct dvb_desc_terrestrial_delivery 48 * @ingroup descriptors 49 * @brief Structure containing the DVB-T terrestrial delivery system descriptor 50 * 51 * @param type descriptor tag 52 * @param length descriptor length 53 * @param next pointer to struct dvb_desc 54 * @param centre_frequency centre frequency, multiplied by 10 Hz 55 * @param bandwidth bandwidth 56 * @param priority priority (0 = LP, 1 = HP) 57 * @param time_slice_indicator time slicing indicator 58 * @param mpe_fec_indicator mpe fec indicator. If 1, MPE-FEC is not used. 59 * @param constellation constellation 60 * @param hierarchy_information hierarchy information 61 * @param code_rate_hp_stream code rate hp stream 62 * @param code_rate_lp_stream code rate lp stream 63 * @param guard_interval guard interval 64 * @param transmission_mode transmission mode 65 * @param other_frequency_flag other frequency flag 66 */ 67 struct dvb_desc_terrestrial_delivery 68 { 69 import std.bitmanip : bitfields; 70 align (1): 71 72 ubyte type; 73 ubyte length; 74 dvb_desc* next; 75 76 uint centre_frequency; 77 78 mixin(bitfields!( 79 ubyte, "reserved_future_use1", 2, 80 ubyte, "mpe_fec_indicator", 1, 81 ubyte, "time_slice_indicator", 1, 82 ubyte, "priority", 1, 83 ubyte, "bandwidth", 3, 84 ubyte, "code_rate_hp_stream", 3, 85 ubyte, "hierarchy_information", 3, 86 ubyte, "constellation", 2, 87 ubyte, "other_frequency_flag", 1, 88 ubyte, "transmission_mode", 2, 89 ubyte, "guard_interval", 2, 90 ubyte, "code_rate_lp_stream", 3, 91 uint, "", 8)); 92 93 uint reserved_future_use2; 94 } 95 96 // struct dvb_v5_fe_parms; 97 98 /** 99 * @brief Initializes and parses the DVB-T terrestrial delivery system descriptor 100 * 101 * @param parms struct dvb_v5_fe_parms pointer to the opened device 102 * @param buf buffer containing the descriptor's raw data 103 * @param desc pointer to struct dvb_desc to be allocated and filled 104 * 105 * This function initializes and makes sure that all fields will follow the CPU 106 * endianness. Due to that, the content of the buffer may change. 107 * 108 * Currently, no memory is allocated internally. 109 * 110 * @return On success, it returns the size of the allocated struct. 111 * A negative value indicates an error. 112 */ 113 int dvb_desc_terrestrial_delivery_init ( 114 dvb_v5_fe_parms* parms, 115 const(ubyte)* buf, 116 dvb_desc* desc); 117 118 /** 119 * @brief Prints the content of the DVB-T terrestrial delivery system descriptor 120 * @ingroup descriptors 121 * 122 * @param parms struct dvb_v5_fe_parms pointer to the opened device 123 * @param desc pointer to struct dvb_desc 124 */ 125 void dvb_desc_terrestrial_delivery_print ( 126 dvb_v5_fe_parms* parms, 127 const(dvb_desc)* desc); 128 129 /** 130 * @brief converts from internal representation into bandwidth in Hz 131 */ 132 extern __gshared const(uint)[] dvbt_bw; 133 134 /** 135 * @brief converts from the descriptor's modulation into enum fe_modulation, 136 * as defined by DVBv5 API. 137 */ 138 extern __gshared const(uint)[] dvbt_modulation; 139 140 /** 141 * @brief converts from the descriptor's hierarchy into enum fe_hierarchy, 142 * as defined by DVBv5 API. 143 */ 144 extern __gshared const(uint)[] dvbt_hierarchy; 145 146 /** 147 * @brief converts from the descriptor's FEC into enum fe_code_rate, 148 * as defined by DVBv5 API. 149 */ 150 extern __gshared const(uint)[] dvbt_code_rate; 151 152 /** 153 * @brief converts from internal representation into enum fe_guard_interval, 154 * as defined at DVBv5 API. 155 */ 156 extern __gshared const(uint)[] dvbt_interval; 157 158 /** 159 * @brief converts from the descriptor's transmission mode into 160 * enum fe_transmit_mode, as defined by DVBv5 API. 161 */ 162 extern __gshared const(uint)[] dvbt_transmission_mode;