1 /* 2 * Copyright (c) 2011-2014 - 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 * Described at ETSI EN 300 468 V1.11.1 (2010-04) 20 */ 21 22 /** 23 * @file desc_cable_delivery.h 24 * @ingroup descriptors 25 * @brief Provides the descriptors for the cable delivery system descriptor 26 * @copyright GNU Lesser General Public License version 2.1 (LGPLv2.1) 27 * @author Mauro Carvalho Chehab 28 * @author Andre Roth 29 * 30 * @par Relevant specs 31 * The descriptor described herein is defined at: 32 * - ETSI EN 300 468 V1.11.1 (2010-04) 33 * 34 * @par Bug Report 35 * Please submit bug reports and patches to linux-media@vger.kernel.org 36 */ 37 38 #ifndef _CABLE_DELIVERY_H 39 #define _CABLE_DELIVERY_H 40 41 #include <libdvbv5/descriptors.h> 42 43 /** 44 * @struct dvb_desc_cable_delivery 45 * @ingroup descriptors 46 * @brief Structure containing the cable delivery system descriptor 47 * 48 * @param type descriptor tag 49 * @param length descriptor length 50 * @param next pointer to struct dvb_desc 51 * @param frequency frequency, converted to Hz. 52 * @param fec_outer FEC outer (typically, Viterbi) 53 * @param modulation modulation 54 * @param fec_inner FEC inner (convolutional code) 55 * @param symbol_rate symbol rate, converted to symbols/sec (bauds) 56 */ 57 struct dvb_desc_cable_delivery { 58 uint8_t type; 59 uint8_t length; 60 struct dvb_desc *next; 61 62 uint32_t frequency; 63 union { 64 uint16_t bitfield1; 65 struct { 66 uint16_t fec_outer:4; 67 uint16_t reserved_future_use:12; 68 } __attribute__((packed)); 69 } __attribute__((packed)); 70 uint8_t modulation; 71 union { 72 uint32_t bitfield2; 73 struct { 74 uint32_t fec_inner:4; 75 uint32_t symbol_rate:28; 76 } __attribute__((packed)); 77 } __attribute__((packed)); 78 } __attribute__((packed)); 79 80 struct dvb_v5_fe_parms; 81 82 #ifdef __cplusplus 83 extern "C" { 84 #endif 85 86 /** 87 * @brief Initializes and parses the service location descriptor 88 * @ingroup descriptors 89 * 90 * @param parms struct dvb_v5_fe_parms pointer to the opened device 91 * @param buf buffer containing the descriptor's raw data 92 * @param desc pointer to struct dvb_desc to be allocated and filled 93 * 94 * This function initializes and makes sure that all fields will follow the CPU 95 * endianness. Due to that, the content of the buffer may change. 96 * 97 * Currently, no memory is allocated internally. 98 * 99 * @return On success, it returns the size of the allocated struct. 100 * A negative value indicates an error. 101 */ 102 int dvb_desc_cable_delivery_init(struct dvb_v5_fe_parms *parms, 103 const uint8_t *buf, struct dvb_desc *desc); 104 105 /** 106 * @brief Prints the content of the service location descriptor 107 * @ingroup descriptors 108 * 109 * @param parms struct dvb_v5_fe_parms pointer to the opened device 110 * @param desc pointer to struct dvb_desc 111 */ 112 void dvb_desc_cable_delivery_print(struct dvb_v5_fe_parms *parms, 113 const struct dvb_desc *desc); 114 115 /** 116 * @brief converts from the descriptor's modulation into enum fe_modulation, 117 * as defined by DVBv5 API. 118 */ 119 extern const unsigned dvbc_modulation_table[]; 120 121 /** 122 * @brief converts from the descriptor's FEC into enum fe_code_rate, 123 * as defined by DVBv5 API. 124 */ 125 extern const unsigned dvbc_fec_table[]; 126 127 128 #ifdef __cplusplus 129 } 130 #endif 131 132 #endif 133