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 #ifndef _TERRESTRIAL_DELIVERY_H 40 #define _TERRESTRIAL_DELIVERY_H 41 42 #include <libdvbv5/descriptors.h> 43 44 /** 45 * @struct dvb_desc_terrestrial_delivery 46 * @ingroup descriptors 47 * @brief Structure containing the DVB-T terrestrial delivery system descriptor 48 * 49 * @param type descriptor tag 50 * @param length descriptor length 51 * @param next pointer to struct dvb_desc 52 * @param centre_frequency centre frequency, multiplied by 10 Hz 53 * @param bandwidth bandwidth 54 * @param priority priority (0 = LP, 1 = HP) 55 * @param time_slice_indicator time slicing indicator 56 * @param mpe_fec_indicator mpe fec indicator. If 1, MPE-FEC is not used. 57 * @param constellation constellation 58 * @param hierarchy_information hierarchy information 59 * @param code_rate_hp_stream code rate hp stream 60 * @param code_rate_lp_stream code rate lp stream 61 * @param guard_interval guard interval 62 * @param transmission_mode transmission mode 63 * @param other_frequency_flag other frequency flag 64 */ 65 struct dvb_desc_terrestrial_delivery { 66 uint8_t type; 67 uint8_t length; 68 struct dvb_desc *next; 69 70 uint32_t centre_frequency; 71 uint8_t reserved_future_use1:2; 72 uint8_t mpe_fec_indicator:1; 73 uint8_t time_slice_indicator:1; 74 uint8_t priority:1; 75 uint8_t bandwidth:3; 76 uint8_t code_rate_hp_stream:3; 77 uint8_t hierarchy_information:3; 78 uint8_t constellation:2; 79 uint8_t other_frequency_flag:1; 80 uint8_t transmission_mode:2; 81 uint8_t guard_interval:2; 82 uint8_t code_rate_lp_stream:3; 83 uint32_t reserved_future_use2; 84 } __attribute__((packed)); 85 86 struct dvb_v5_fe_parms; 87 88 #ifdef __cplusplus 89 extern "C" { 90 #endif 91 92 /** 93 * @brief Initializes and parses the DVB-T terrestrial delivery system descriptor 94 * 95 * @param parms struct dvb_v5_fe_parms pointer to the opened device 96 * @param buf buffer containing the descriptor's raw data 97 * @param desc pointer to struct dvb_desc to be allocated and filled 98 * 99 * This function initializes and makes sure that all fields will follow the CPU 100 * endianness. Due to that, the content of the buffer may change. 101 * 102 * Currently, no memory is allocated internally. 103 * 104 * @return On success, it returns the size of the allocated struct. 105 * A negative value indicates an error. 106 */ 107 int dvb_desc_terrestrial_delivery_init(struct dvb_v5_fe_parms *parms, 108 const uint8_t *buf, 109 struct dvb_desc *desc); 110 111 /** 112 * @brief Prints the content of the DVB-T terrestrial delivery system descriptor 113 * @ingroup descriptors 114 * 115 * @param parms struct dvb_v5_fe_parms pointer to the opened device 116 * @param desc pointer to struct dvb_desc 117 */ 118 void dvb_desc_terrestrial_delivery_print(struct dvb_v5_fe_parms *parms, 119 const struct dvb_desc *desc); 120 121 /** 122 * @brief converts from internal representation into bandwidth in Hz 123 */ 124 extern const unsigned dvbt_bw[]; 125 126 /** 127 * @brief converts from the descriptor's modulation into enum fe_modulation, 128 * as defined by DVBv5 API. 129 */ 130 extern const unsigned dvbt_modulation[]; 131 132 /** 133 * @brief converts from the descriptor's hierarchy into enum fe_hierarchy, 134 * as defined by DVBv5 API. 135 */ 136 extern const unsigned dvbt_hierarchy[]; 137 138 /** 139 * @brief converts from the descriptor's FEC into enum fe_code_rate, 140 * as defined by DVBv5 API. 141 */ 142 extern const unsigned dvbt_code_rate[]; 143 144 /** 145 * @brief converts from internal representation into enum fe_guard_interval, 146 * as defined at DVBv5 API. 147 */ 148 extern const uint32_t dvbt_interval[]; 149 150 /** 151 * @brief converts from the descriptor's transmission mode into 152 * enum fe_transmit_mode, as defined by DVBv5 API. 153 */ 154 extern const unsigned dvbt_transmission_mode[]; 155 156 #ifdef __cplusplus 157 } 158 #endif 159 160 #endif 161