include/lib/dvb/lowlevel/pes.h

   1
   2 /*
   3  * PACKETIZED ELEMENTARY STREAM
   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 __PES_H__
  30 #define __PES_H__
  31
  32 #include <sys/types.h>
  33
  34 #if BYTE_ORDER == BIG_ENDIAN
  35 #define PES_START_CODE_PREFIX_RAW       0x000010
  36 #else
  37 #define PES_START_CODE_PREFIX_RAW       0x010000
  38 #endif
  39
  40 #define PES_START_CODE_PREFIX   0x010000
  41
  42 typedef struct {
  43         u_int start_code_prefix                 : 24;   // 000001
  44         u_char stream_id                        : 8;
  45         u_char pes_packet_length_hi             : 8;
  46         u_char pes_packet_length_lo             : 8;
  47 } pes_hdr_t;
  48
  49 #define PES_HDR_LEN 6
  50
  51 typedef struct {
  52 #if BYTE_ORDER == BIG_ENDIAN
  53         u_char start_code_prefix                : 2;    /* 0x02 */
  54         u_char pes_scrambling_control           : 2;
  55         u_char pes_priority                     : 1;
  56         u_char data_alignment_indicator         : 1;
  57         u_char copyright                        : 1;
  58         u_char original_or_copy                 : 1;
  59
  60         u_char pts_dts_flags                    : 2;
  61         u_char escr_flag                        : 1;
  62         u_char es_rate_flag                     : 1;
  63         u_char dsm_trick_mode_flag              : 1;
  64         u_char additional_copy_info_flag        : 1;
  65         u_char pes_crc_flag                     : 1;
  66         u_char pes_extension_flag               : 1;
  67 #else
  68         u_char original_or_copy                 : 1;
  69         u_char copyright                        : 1;
  70         u_char data_alignment_indicator         : 1;
  71         u_char pes_priority                     : 1;
  72         u_char pes_scrambling_control           : 2;
  73         u_char start_code_prefix                : 2;    /* 0x02 */
  74
  75         u_char pes_extension_flag               : 1;
  76         u_char pes_crc_flag                     : 1;
  77         u_char additional_copy_info_flag        : 1;
  78         u_char dsm_trick_mode_flag              : 1;
  79         u_char es_rate_flag                     : 1;
  80         u_char escr_flag                        : 1;
  81         u_char pts_dts_flags                    : 2;
  82 #endif
  83
  84         u_char pes_header_data_length           : 8;
  85 } pes_flag_t;
  86
  87 #define PES_FLAG_LEN 3
  88
  89 //TODO: check ENIANs and comvert pts stuff into bytes
  90
  91 struct pts_dts_flags_2_struct {
  92 #if BYTE_ORDER == BIG_ENDIAN
  93         u_char marker_bit0                      : 1;
  94         u_char pts_32_30                        : 3;
  95         u_char                                  : 4;            /* has to be 0010b */
  96 #else
  97         u_char                                  : 4;            /* has to be 0010b */
  98         u_char pts_32_30                        : 3;
  99         u_char marker_bit0                      : 1;
 100 #endif
 101
 102         u_short pts_29_15                       : 15;
 103         u_char marker_bit1                      : 1;
 104
 105         u_short pts_14_0                        : 15;
 106         u_char marker_bit2                      : 1;
 107 };
 108
 109 struct PTS_DTS_flags_3__struct {
 110         u_char                                  : 4;            /* has to be 0011b */
 111         u_char pts_32_30                        : 3;
 112         u_char marker_bit0                      : 1;
 113
 114         u_short pts_29_15                       : 15;
 115         u_char marker_bit1                      : 1;
 116
 117         u_short pts_14_0                        : 15;
 118         u_char marker_bit2                      : 1;
 119
 120         u_char                                  : 2;            /* has to be 0001b */
 121         u_char dtp_32_30                        : 3;
 122         u_char marker_bit3                      : 1;
 123         u_short dtp_29_15                       : 15;
 124         u_char marker_bit4                      : 1;
 125         u_short dtp_14_0                        : 15;
 126         u_char marker_bit5                      : 1;
 127 };
 128
 129 struct escr_flag_struct {
 130         u_char                                  : 2;
 131         u_char escr_base_32_30                  : 3;
 132         u_char marker_bit0                      : 1;
 133         u_short escr_base_29_15                 : 15;
 134         u_char marker_bit1                      : 1;
 135         u_short escr_base_14_0                  : 15;
 136         u_char marker_bit2                      : 1;
 137         u_short escr_extension                  : 9;
 138         u_char marker_bit3                      : 1;
 139 };
 140
 141 struct es_rate_flag_struct {
 142         u_char marker_bit0                      : 1;
 143         u_int es_rate                           : 22;
 144         u_char marker_bit1                      : 1;
 145 };
 146
 147 struct dsm_trick_mode_flag_struct {
 148         u_char trick_mode_control               : 3;
 149         union {
 150                 struct {
 151                         u_char field_id             : 2;
 152                         u_char intra_slice_refresh  : 1;
 153                         u_char frequency_truncation : 2;
 154                 } fast_forward;
 155
 156                 struct {
 157                         u_char rep_cntrl        : 5;
 158                 } slow_motion;
 159
 160                 struct {
 161                         u_char field_id         : 2;
 162                         u_char                  : 3;
 163                 } freeze_frame;
 164
 165                 struct {
 166                         u_char field_id                 : 2;
 167                         u_char intra_slice_refresh      : 1;
 168                         u_char frequency_truncation     : 2;
 169                 } fast_reverse;
 170
 171                 struct {
 172                         u_char rep_cntrli               : 5;
 173                 } slow_reverse;
 174         } mode;
 175 };
 176
 177 struct additional_copy_info_flag_struct {
 178         u_char marker_bit                               : 1;
 179         u_char additional_copy_info                     : 7;
 180 };
 181
 182 struct pes_crc_flag_struct {
 183         u_short previous_pes_packet_crc                 : 16;
 184 };
 185
 186 struct pes_extension_flag_struct {
 187         u_char pes_private_data_flag                    : 1;
 188         u_char pack_header_field_flag                   : 1;
 189         u_char program_packet_sequence_counter_flag     : 1;
 190         u_char psdt_buffer_flag                         : 1;
 191         u_char                                          : 3;
 192         u_char pes_extension_flag_2                     : 1;
 193 /* DENT: tjo ... just continue here to fill structs in ... */
 194 };
 195
 196 #define STREAM_PROGRAM_MAP      0xBC
 197 #define STREAM_PRIVATE_1        0xBD
 198 #define STREAM_PRIVATE_2        0xBF
 199 #define STREAM_PADDING          0xBE
 200 #define STREAM_AUDIO            0xBC    // 110X XXXX
 201 #define STREAM_VIDEO            0xE0    // 1110 XXXX
 202 #define STREAM_ECM              0xF0
 203 #define STREAM_EMM              0xF1
 204 #define STREAM_DSMCC            0xF2
 205 #define STREAM_ITU_A            0xF4
 206 #define STREAM_ITU_B            0xF5
 207 #define STREAM_ITU_C            0xF6
 208 #define STREAM_ITU_D            0xF7
 209 #define STREAM_ITU_E            0xF8
 210 #define STREAM_MASK_AUDIO       0xE0
 211 #define STREAM_REST_AUDIO       0xC0
 212 #define STREAM_MASK_VIDEO       0xF0
 213 #define STREAM_REST_VIDEO       0xE0
 214
 215 #endif