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 /** 22 * @file desc_event_extended.h 23 * @ingroup descriptors 24 * @brief Provides the descriptors for the extended event descriptor 25 * @copyright GNU Lesser General Public License version 2.1 (LGPLv2.1) 26 * @author Mauro Carvalho Chehab 27 * @author Andre Roth 28 * 29 * @par Relevant specs 30 * The descriptor described herein is defined at: 31 * - ETSI EN 300 468 V1.11.1 32 * 33 * @par Bug Report 34 * Please submit bug reports and patches to linux-media@vger.kernel.org 35 */ 36 37 #ifndef _DESC_EVENT_EXTENDED_H 38 #define _DESC_EVENT_EXTENDED_H 39 40 #include <libdvbv5/descriptors.h> 41 42 struct dvb_desc_event_extended_item { 43 char *description; 44 char *description_emph; 45 char *item; 46 char *item_emph; 47 }; 48 49 /** 50 * @struct dvb_desc_event_extended 51 * @ingroup descriptors 52 * @brief Structure containing the extended event descriptor 53 * 54 * @param type descriptor tag 55 * @param length descriptor length 56 * @param next pointer to struct dvb_desc 57 * @param id descriptor number 58 * @param last_id last descriptor number 59 * @param language ISO 639 language code 60 * @param text text string 61 * @param text_emph text emphasis string 62 * 63 * @details 64 * The emphasis text is the one that uses asterisks. For example, in the text: 65 * "the quick *fox* jumps over the lazy table" the emphasis would be "fox". 66 */ 67 68 struct dvb_desc_event_extended { 69 uint8_t type; 70 uint8_t length; 71 struct dvb_desc *next; 72 73 union { 74 struct { 75 uint8_t last_id:4; 76 uint8_t id:4; 77 } __attribute__((packed)); 78 uint8_t ids; 79 } __attribute__((packed)); 80 81 unsigned char language[4]; 82 char *text; 83 char *text_emph; 84 struct dvb_desc_event_extended_item *items; 85 int num_items; 86 } __attribute__((packed)); 87 88 struct dvb_v5_fe_parms; 89 90 #ifdef __cplusplus 91 extern "C" { 92 #endif 93 94 /** 95 * @brief Initializes and parses the extended event descriptor 96 * @ingroup descriptors 97 * 98 * @param parms struct dvb_v5_fe_parms pointer to the opened device 99 * @param buf buffer containing the descriptor's raw data 100 * @param desc pointer to struct dvb_desc to be allocated and filled 101 * 102 * This function allocates a the descriptor and fills the fields inside 103 * the struct. It also makes sure that all fields will follow the CPU 104 * endianness. Due to that, the content of the buffer may change. 105 * 106 * @return On success, it returns the size of the allocated struct. 107 * A negative value indicates an error. 108 */ 109 int dvb_desc_event_extended_init(struct dvb_v5_fe_parms *parms, 110 const uint8_t *buf, struct dvb_desc *desc); 111 112 /** 113 * @brief Prints the content of the extended event descriptor 114 * @ingroup descriptors 115 * 116 * @param parms struct dvb_v5_fe_parms pointer to the opened device 117 * @param desc pointer to struct dvb_desc 118 */ 119 void dvb_desc_event_extended_print(struct dvb_v5_fe_parms *parms, 120 const struct dvb_desc *desc); 121 122 /** 123 * @brief Frees all data allocated by the extended event descriptor 124 * @ingroup descriptors 125 * 126 * @param desc pointer to struct dvb_desc to be freed 127 */ 128 void dvb_desc_event_extended_free(struct dvb_desc *desc); 129 130 #ifdef __cplusplus 131 } 132 #endif 133 134 #endif 135