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_language.h 23 * @ingroup descriptors 24 * @brief Provides the descriptors for the ISO639 language 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 * - ISO/IEC 13818-1 32 * 33 * @par Bug Report 34 * Please submit bug reports and patches to linux-media@vger.kernel.org 35 */ 36 37 #ifndef _DESC_LANGUAGE_H 38 #define _DESC_LANGUAGE_H 39 40 #include <libdvbv5/descriptors.h> 41 42 /** 43 * @struct dvb_desc_language 44 * @ingroup descriptors 45 * @brief Structure containing the ISO639 language descriptor 46 * 47 * @param type descriptor tag 48 * @param length descriptor length 49 * @param next pointer to struct dvb_desc 50 * @param language ISO639 language string 51 * @param audio_type audio type: 0 = undefined, 1 = clean effects, 52 * 2 = hearing impaired, 3 = visual impired 53 * comentary, other values are reserved. 54 */ 55 struct dvb_desc_language { 56 uint8_t type; 57 uint8_t length; 58 struct dvb_desc *next; 59 60 unsigned char language[4]; 61 uint8_t audio_type; 62 } __attribute__((packed)); 63 64 struct dvb_v5_fe_parms; 65 66 #ifdef __cplusplus 67 extern "C" { 68 #endif 69 70 /** 71 * @brief Initializes and parses the language descriptor 72 * @ingroup descriptors 73 * 74 * @param parms struct dvb_v5_fe_parms pointer to the opened device 75 * @param buf buffer containing the descriptor's raw data 76 * @param desc pointer to struct dvb_desc to be allocated and filled 77 * 78 * This function initializes and makes sure that all fields will follow the CPU 79 * endianness. Due to that, the content of the buffer may change. 80 * 81 * Currently, no memory is allocated internally. 82 * 83 * @return On success, it returns the size of the allocated struct. 84 * A negative value indicates an error. 85 */ 86 int dvb_desc_language_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf, 87 struct dvb_desc *desc); 88 89 /** 90 * @brief Prints the content of the language descriptor 91 * @ingroup descriptors 92 * 93 * @param parms struct dvb_v5_fe_parms pointer to the opened device 94 * @param desc pointer to struct dvb_desc 95 */ 96 void dvb_desc_language_print(struct dvb_v5_fe_parms *parms, 97 const struct dvb_desc *desc); 98 99 #ifdef __cplusplus 100 } 101 #endif 102 103 #endif 104