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 */ 20 21 /** 22 * @file desc_hierarchy.h 23 * @ingroup descriptors 24 * @brief Provides the descriptors for the hierarchy 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 * @see 34 * 35 * @par Bug Report 36 * Please submit bug reports and patches to linux-media@vger.kernel.org 37 */ 38 39 module libdvbv5_d.desc_hierarchy; 40 41 import libdvbv5_d.descriptors: dvb_desc; 42 import libdvbv5_d.dvb_fe: dvb_v5_fe_parms; 43 44 extern (C): 45 46 /** 47 * @struct dvb_desc_hierarchy 48 * @ingroup descriptors 49 * @brief Structure containing the hierarchy descriptor 50 * 51 * @param type descriptor tag 52 * @param length descriptor length 53 * @param next pointer to struct dvb_desc 54 * @param hierarchy_type hierarchy type 55 * @param layer hierarchy layer index 56 * @param embedded_layer hierarchy embedded layer index 57 * @param channel hierarchy channel 58 */ 59 struct dvb_desc_hierarchy 60 { 61 import std.bitmanip : bitfields; 62 align (1): 63 64 ubyte type; 65 ubyte length; 66 dvb_desc* next; 67 68 mixin(bitfields!( 69 ubyte, "hierarchy_type", 4, 70 ubyte, "reserved", 4, 71 ubyte, "layer", 6, 72 ubyte, "reserved2", 2, 73 ubyte, "embedded_layer", 6, 74 ubyte, "reserved3", 2, 75 ubyte, "channel", 6, 76 ubyte, "reserved4", 2)); 77 } 78 79 // struct dvb_v5_fe_parms; 80 81 /** 82 * @brief Initializes and parses the hierarchy descriptor 83 * @ingroup descriptors 84 * 85 * @param parms struct dvb_v5_fe_parms pointer to the opened device 86 * @param buf buffer containing the descriptor's raw data 87 * @param desc pointer to struct dvb_desc to be allocated and filled 88 * 89 * This function initializes and makes sure that all fields will follow the CPU 90 * endianness. Due to that, the content of the buffer may change. 91 * 92 * Currently, no memory is allocated internally. 93 * 94 * @return On success, it returns the size of the allocated struct. 95 * A negative value indicates an error. 96 */ 97 int dvb_desc_hierarchy_init ( 98 dvb_v5_fe_parms* parms, 99 const(ubyte)* buf, 100 dvb_desc* desc); 101 102 /** 103 * @brief Prints the content of the hierarchy descriptor 104 * @ingroup descriptors 105 * 106 * @param parms struct dvb_v5_fe_parms pointer to the opened device 107 * @param desc pointer to struct dvb_desc 108 */ 109 void dvb_desc_hierarchy_print (dvb_v5_fe_parms* parms, const(dvb_desc)* desc);