include/lib/dvb/lowlevel/ts.h

   1
   2 /*
   3  * TRANSPORT STREAM
   4  *
   5  * Copyright (C) 1998, 1999  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 __TS_H__
  30 #define __TS_H__
  31
  32 #include <sys/types.h>
  33
  34 #define TS_SYNC_BYTE    0x47
  35
  36 #define TS_LEN  188
  37 #define TS_HDR_LEN 4
  38 #define TS_DATA_LEN (TS_LEN - TS_HDR_LEN)
  39
  40 typedef struct {
  41         u_char sync_byte                        : 8;    /* should be 0x47 */
  42
  43 #if BYTE_ORDER == BIG_ENDIAN
  44         u_char transport_error_indicator        : 1;
  45         u_char payload_unit_start_indicator     : 1;
  46         u_char transport_priority               : 1;
  47         u_char PID_hi                           : 5;
  48 #else
  49         u_char PID_hi                           : 5;
  50         u_char transport_priority               : 1;
  51         u_char payload_unit_start_indicator     : 1;
  52         u_char transport_error_indicator        : 1;
  53 #endif
  54         u_char PID_lo                           : 8;
  55
  56 #if BYTE_ORDER == BIG_ENDIAN
  57         u_char transport_scrambling_control     : 2;
  58         u_char adaptation_field_control         : 2;
  59         u_char continuity_counter               : 4;
  60 #else
  61         u_char continuity_counter               : 4;
  62         u_char adaptation_field_control         : 2;
  63         u_char transport_scrambling_control     : 2;
  64 #endif
  65 } ts_hdr_t;
  66
  67 #define TS_ADAPTATION_FIELD_LEN 1
  68
  69 typedef struct {
  70 #if BYTE_ORDER == BIG_ENDIAN
  71         u_char discontinuity_indicator                  : 1;
  72         u_char random_access_indicator                  : 1;
  73         u_char elementary_stream_priority_indicator     : 1;
  74         u_char pcr_flag                                 : 1;
  75         u_char opcr_flag                                : 1;
  76         u_char splicing_point_flag                      : 1;
  77         u_char transport_private_data_flag              : 1;
  78         u_char adaptation_field_extension_flag          : 1;
  79 #else
  80         u_char adaptation_field_extension_flag          : 1;
  81         u_char transport_private_data_flag              : 1;
  82         u_char splicing_point_flag                      : 1;
  83         u_char opcr_flag                                : 1;
  84         u_char pcr_flag                                 : 1;
  85         u_char elementary_stream_priority_indicator     : 1;
  86         u_char random_access_indicator                  : 1;
  87         u_char discontinuity_indicator                  : 1;
  88 #endif
  89 } ts_adapt_fld_t;
  90
  91 #define TS_PCR_LEN 6
  92
  93 typedef struct {
  94         u_char program_clock_reference_base_1           : 8;
  95
  96         u_char program_clock_reference_base_2           : 8;
  97
  98         u_char program_clock_reference_base_3           : 8;
  99
 100         u_char program_clock_reference_base_4           : 8;
 101
 102 #if BYTE_ORDER == BIG_ENDIAN
 103         u_char program_clock_reference_base_5           : 1;
 104         u_char                                          : 6;
 105         u_char program_clock_reference_extension_hi     : 1;
 106 #else
 107         u_char program_clock_reference_extension_hi     : 1;
 108         u_char                                          : 6;
 109         u_char program_clock_reference_base_5           : 1;
 110 #endif
 111
 112         u_char program_clock_reference_extension_lo     : 8;
 113 } ts_pcr_t;
 114
 115 struct ts_opcr_struct {
 116         unsigned long long original_program_clock_reference_base: 33;
 117         u_char reserved                         : 6;
 118         u_short original_program_clock_reference_extension: 9;
 119 };
 120
 121 struct ts_splicing_point_struct {
 122         u_char splice_countdown                         : 8;
 123 };
 124
 125 struct ts_transport_private_data_struct {
 126         u_char transport_private_data_length            : 8;
 127 };
 128
 129 struct ts_adaptation_field_extension_struct {
 130 #if BYTE_ORDER == BIG_ENDIAN
 131         u_char reserved                                 : 5;
 132         u_char seamless_splice_flag                     : 1;
 133         u_char piecewise_rate_flag                      : 1;
 134         u_char ltw_flag                                 : 1;
 135         u_char adaptation_field_extension_length        : 8;
 136 #else
 137         u_char adaptation_field_extension_length        : 8;
 138         u_char ltw_flag                                 : 1;
 139         u_char piecewise_rate_flag                      : 1;
 140         u_char seamless_splice_flag                     : 1;
 141         u_char reserved                                 : 5;
 142 #endif
 143 };
 144
 145 // TODO: CHECK DOWN HERE
 146
 147 struct ts_ltw_struct {
 148         u_char ltw_calid_flag                           : 1;
 149         u_short ltw_offset                              : 15;
 150 };
 151
 152 struct ts_piecewise_rate_struct {
 153         u_char reserved                                 : 2;
 154         u_int piecewise_rate                            : 22;
 155 };
 156
 157 struct ts_seamless_splice_struct {
 158         u_char splice_type                              : 4;
 159         u_char DTS_next_AU_32_30                        : 3;
 160         u_char marker_bit0                              : 1;
 161         u_short DTS_next_AU_29_15                       : 15;
 162         u_char marker_bit1                              : 1;
 163         u_short DTS_next_AU_14_0                        : 15;
 164         u_char marker_bit2                              : 1;
 165 };
 166
 167 #define TS_PAYLEN       184
 168 #define TS_NOSYNC       -1      /* no valid sync byte */
 169 #define TS_NODATA       -2      /* no payload */
 170 #define TS_SCRAMBLED    -3      /* scrambled - and we can't descramble it */
 171 #define TS_INPKT        -4      /* doing our reassembling task */
 172 #define TS_UNKNOWN      -5      /* an unknown error appeared */
 173
 174 #endif