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 */ 20 21 #ifndef _DESC_FREQUENCY_LIST_H 22 #define _DESC_FREQUENCY_LIST_H 23 24 #include <libdvbv5/descriptors.h> 25 /** 26 * @file desc_frequency_list.h 27 * @ingroup descriptors 28 * @brief Provides the descriptors for the frequency list descriptor. 29 * This descriptor lists the additional frequencies used in transmission 30 * of a multiplex on other frequencies. 31 * @copyright GNU Lesser General Public License version 2.1 (LGPLv2.1) 32 * @author Mauro Carvalho Chehab 33 * @author Andre Roth 34 * 35 * @par Relevant specs 36 * The descriptor described herein is defined at: 37 * - ETSI EN 300 468 V1.11.1 38 * 39 * @par Bug Report 40 * Please submit bug reports and patches to linux-media@vger.kernel.org 41 */ 42 43 /** 44 * @struct dvb_desc_frequency_list 45 * @ingroup descriptors 46 * @brief Struct containing the frequency list descriptor 47 * 48 * @param type descriptor tag 49 * @param length descriptor length 50 * @param next pointer to struct dvb_desc 51 * @param frequencies number of frequencies in the frequency vector 52 * @param frequency vector with the centre frequency 53 * @param freq_type freq type, being: 0 = undefined, 54 * 1 = satelite, 2 = cable or 3 = terrestrial. 55 */ 56 struct dvb_desc_frequency_list { 57 uint8_t type; 58 uint8_t length; 59 struct dvb_desc *next; 60 61 uint8_t frequencies; 62 uint32_t *frequency; 63 64 union { 65 uint8_t bitfield; 66 struct { 67 uint8_t freq_type:2; 68 uint8_t reserved:6; 69 } __attribute__((packed)); 70 } __attribute__((packed)); 71 } __attribute__((packed)); 72 73 struct dvb_v5_fe_parms; 74 75 #ifdef __cplusplus 76 extern "C" { 77 #endif 78 79 /** 80 * @brief Initializes and parses the frequency list descriptor 81 * @ingroup descriptors 82 * 83 * @param parms struct dvb_v5_fe_parms pointer to the opened device 84 * @param buf buffer containing the descriptor's raw data 85 * @param desc pointer to struct dvb_desc to be allocated and filled 86 * 87 * This function initializes and makes sure that all fields will follow the CPU 88 * endianness. Due to that, the content of the buffer may change. 89 * 90 * Currently, no memory is allocated internally. 91 * 92 * @return On success, it returns the size of the allocated struct. 93 * A negative value indicates an error. 94 */ 95 int dvb_desc_frequency_list_init(struct dvb_v5_fe_parms *parms, 96 const uint8_t *buf, struct dvb_desc *desc); 97 98 /** 99 * @brief Prints the content of the frequency list descriptor 100 * @ingroup descriptors 101 * 102 * @param parms struct dvb_v5_fe_parms pointer to the opened device 103 * @param desc pointer to struct dvb_desc 104 */ 105 void dvb_desc_frequency_list_print(struct dvb_v5_fe_parms *parms, 106 const struct dvb_desc *desc); 107 108 #ifdef __cplusplus 109 } 110 #endif 111 112 #endif 113