include/lib/dvb/lowlevel/sdt.h

   1
   2 /*
   3  * SERVICE DESCRIPTION TABLE
   4  *
   5  * Copyright (C) 1998  Thomas Mirlacher
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * The author may be reached as dent@cosy.sbg.ac.at, or
  22  * Thomas Mirlacher, Jakob-Haringerstr. 2, A-5020 Salzburg,
  23  * Austria
  24  *
  25  *------------------------------------------------------------
  26  *
  27  */
  28
  29 #ifndef __SDT_H__
  30 #define __SDT_H__
  31
  32 #include <sys/types.h>
  33
  34 #define SDT_LEN 11
  35
  36 typedef struct {
  37         u_char  table_id                        : 8;
  38
  39 #if BYTE_ORDER == BIG_ENDIAN
  40         u_char  section_syntax_indicator        : 1;
  41         u_char                                  : 3;
  42         u_char  section_length_hi               : 4;
  43 #else
  44         u_char  section_length_hi               : 4;
  45         u_char                                  : 3;
  46         u_char  section_syntax_indicator        : 1;
  47 #endif
  48
  49         u_char  section_length_lo               : 8;
  50
  51         u_char  transport_stream_id_hi          : 8;
  52         u_char  transport_stream_id_lo          : 8;
  53
  54 #if BYTE_ORDER == BIG_ENDIAN
  55         u_char                                  : 2;
  56         u_char  version_number                  : 5;
  57         u_char  current_next_indicator          : 1;
  58 #else
  59         u_char  current_next_indicator          : 1;
  60         u_char  version_number                  : 5;
  61         u_char                                  : 2;
  62 #endif
  63
  64         u_char  section_number                  : 8;
  65         u_char  last_section_number             : 8;
  66         u_char  original_network_id_hi          : 8;
  67         u_char  original_network_id_lo          : 8;
  68         u_char                                  : 8;
  69 } sdt_t;
  70
  71 #define SDT_DESCR_LEN 5
  72
  73 struct sdt_descr_struct {
  74         u_char  service_id_hi                   : 8;
  75         u_char  service_id_lo                   : 8;
  76
  77 #if BYTE_ORDER == BIG_ENDIAN
  78         u_char                                  : 6;
  79         u_char  EIT_schedule_flag               : 1;
  80         u_char  EIT_present_following_flag      : 1;
  81
  82         u_char  running_status                  : 3;
  83         u_char  free_ca_mode                    : 1;
  84         u_char  descriptors_loop_length_hi      : 4;
  85 #else
  86         u_char  EIT_present_following_flag      : 1;
  87         u_char  EIT_schedule_flag               : 1;
  88         u_char                                  : 6;
  89
  90         u_char  descriptors_loop_length_hi      : 4;
  91         u_char  free_ca_mode                    : 1;
  92         u_char  running_status                  : 3;
  93 #endif
  94
  95         u_char  descriptors_loop_length_lo      : 8;
  96 };
  97 typedef struct sdt_descr_struct sdt_descr_t;
  98
  99 #define SDT_SERVICE_DESCRIPTOR 0x48
 100
 101 struct sdt_generic_descriptor {
 102         u_char  descriptor_tag                  : 8;
 103         u_char  descriptor_length               : 8;
 104 };
 105
 106 struct sdt_service_descriptor_1 {
 107         u_char  service_type                    : 8;
 108         u_char  service_provider_name_length    : 8;
 109 };
 110
 111 struct sdt_service_descriptor_2 {
 112         u_char  service_name_length             : 8;
 113 };
 114
 115 struct sdt_service_desc {
 116         u_char  description_tag                 : 8;
 117         u_char  description_length              : 8;
 118         u_char  service_type                    : 8;
 119         u_char  service_provider_name_length    : 8;
 120 };
 121
 122 #endif