vendor/james-heinrich/getid3/getid3/module.misc.iso.php

   1 <?php
   2 /////////////////////////////////////////////////////////////////
   3 /// getID3() by James Heinrich <info@getid3.org>               //
   4 //  available at http://getid3.sourceforge.net                 //
   5 //            or http://www.getid3.org                         //
   6 //          also https://github.com/JamesHeinrich/getID3       //
   7 /////////////////////////////////////////////////////////////////
   8 // See readme.txt for more details                             //
   9 /////////////////////////////////////////////////////////////////
  10 //                                                             //
  11 // module.misc.iso.php                                         //
  12 // module for analyzing ISO files                              //
  13 // dependencies: NONE                                          //
  14 //                                                            ///
  15 /////////////////////////////////////////////////////////////////
  16
  17
  18 class getid3_iso extends getid3_handler
  19 {
  20
  21         public function Analyze() {
  22                 $info = &$this->getid3->info;
  23
  24                 $info['fileformat'] = 'iso';
  25
  26                 for ($i = 16; $i <= 19; $i++) {
  27                         $this->fseek(2048 * $i);
  28                         $ISOheader = $this->fread(2048);
  29                         if (substr($ISOheader, 1, 5) == 'CD001') {
  30                                 switch (ord($ISOheader{0})) {
  31                                         case 1:
  32                                                 $info['iso']['primary_volume_descriptor']['offset'] = 2048 * $i;
  33                                                 $this->ParsePrimaryVolumeDescriptor($ISOheader);
  34                                                 break;
  35
  36                                         case 2:
  37                                                 $info['iso']['supplementary_volume_descriptor']['offset'] = 2048 * $i;
  38                                                 $this->ParseSupplementaryVolumeDescriptor($ISOheader);
  39                                                 break;
  40
  41                                         default:
  42                                                 // skip
  43                                                 break;
  44                                 }
  45                         }
  46                 }
  47
  48                 $this->ParsePathTable();
  49
  50                 $info['iso']['files'] = array();
  51                 foreach ($info['iso']['path_table']['directories'] as $directorynum => $directorydata) {
  52                         $info['iso']['directories'][$directorynum] = $this->ParseDirectoryRecord($directorydata);
  53                 }
  54
  55                 return true;
  56         }
  57
  58
  59         public function ParsePrimaryVolumeDescriptor(&$ISOheader) {
  60                 // ISO integer values are stored *BOTH* Little-Endian AND Big-Endian format!!
  61                 // ie 12345 == 0x3039  is stored as $39 $30 $30 $39 in a 4-byte field
  62
  63                 // shortcuts
  64                 $info = &$this->getid3->info;
  65                 $info['iso']['primary_volume_descriptor']['raw'] = array();
  66                 $thisfile_iso_primaryVD     = &$info['iso']['primary_volume_descriptor'];
  67                 $thisfile_iso_primaryVD_raw = &$thisfile_iso_primaryVD['raw'];
  68
  69                 $thisfile_iso_primaryVD_raw['volume_descriptor_type']         = getid3_lib::LittleEndian2Int(substr($ISOheader,    0, 1));
  70                 $thisfile_iso_primaryVD_raw['standard_identifier']            =                  substr($ISOheader,    1, 5);
  71                 if ($thisfile_iso_primaryVD_raw['standard_identifier'] != 'CD001') {
  72                         $this->error('Expected "CD001" at offset ('.($thisfile_iso_primaryVD['offset'] + 1).'), found "'.$thisfile_iso_primaryVD_raw['standard_identifier'].'" instead');
  73                         unset($info['fileformat']);
  74                         unset($info['iso']);
  75                         return false;
  76                 }
  77
  78
  79                 $thisfile_iso_primaryVD_raw['volume_descriptor_version']     = getid3_lib::LittleEndian2Int(substr($ISOheader,    6, 1));
  80                 //$thisfile_iso_primaryVD_raw['unused_1']                      =                              substr($ISOheader,    7, 1);
  81                 $thisfile_iso_primaryVD_raw['system_identifier']             =                              substr($ISOheader,    8, 32);
  82                 $thisfile_iso_primaryVD_raw['volume_identifier']             =                              substr($ISOheader,   40, 32);
  83                 //$thisfile_iso_primaryVD_raw['unused_2']                      =                              substr($ISOheader,   72, 8);
  84                 $thisfile_iso_primaryVD_raw['volume_space_size']             = getid3_lib::LittleEndian2Int(substr($ISOheader,   80, 4));
  85                 //$thisfile_iso_primaryVD_raw['unused_3']                      =                              substr($ISOheader,   88, 32);
  86                 $thisfile_iso_primaryVD_raw['volume_set_size']               = getid3_lib::LittleEndian2Int(substr($ISOheader,  120, 2));
  87                 $thisfile_iso_primaryVD_raw['volume_sequence_number']        = getid3_lib::LittleEndian2Int(substr($ISOheader,  124, 2));
  88                 $thisfile_iso_primaryVD_raw['logical_block_size']            = getid3_lib::LittleEndian2Int(substr($ISOheader,  128, 2));
  89                 $thisfile_iso_primaryVD_raw['path_table_size']               = getid3_lib::LittleEndian2Int(substr($ISOheader,  132, 4));
  90                 $thisfile_iso_primaryVD_raw['path_table_l_location']         = getid3_lib::LittleEndian2Int(substr($ISOheader,  140, 2));
  91                 $thisfile_iso_primaryVD_raw['path_table_l_opt_location']     = getid3_lib::LittleEndian2Int(substr($ISOheader,  144, 2));
  92                 $thisfile_iso_primaryVD_raw['path_table_m_location']         = getid3_lib::LittleEndian2Int(substr($ISOheader,  148, 2));
  93                 $thisfile_iso_primaryVD_raw['path_table_m_opt_location']     = getid3_lib::LittleEndian2Int(substr($ISOheader,  152, 2));
  94                 $thisfile_iso_primaryVD_raw['root_directory_record']         =                              substr($ISOheader,  156, 34);
  95                 $thisfile_iso_primaryVD_raw['volume_set_identifier']         =                              substr($ISOheader,  190, 128);
  96                 $thisfile_iso_primaryVD_raw['publisher_identifier']          =                              substr($ISOheader,  318, 128);
  97                 $thisfile_iso_primaryVD_raw['data_preparer_identifier']      =                              substr($ISOheader,  446, 128);
  98                 $thisfile_iso_primaryVD_raw['application_identifier']        =                              substr($ISOheader,  574, 128);
  99                 $thisfile_iso_primaryVD_raw['copyright_file_identifier']     =                              substr($ISOheader,  702, 37);
 100                 $thisfile_iso_primaryVD_raw['abstract_file_identifier']      =                              substr($ISOheader,  739, 37);
 101                 $thisfile_iso_primaryVD_raw['bibliographic_file_identifier'] =                              substr($ISOheader,  776, 37);
 102                 $thisfile_iso_primaryVD_raw['volume_creation_date_time']     =                              substr($ISOheader,  813, 17);
 103                 $thisfile_iso_primaryVD_raw['volume_modification_date_time'] =                              substr($ISOheader,  830, 17);
 104                 $thisfile_iso_primaryVD_raw['volume_expiration_date_time']   =                              substr($ISOheader,  847, 17);
 105                 $thisfile_iso_primaryVD_raw['volume_effective_date_time']    =                              substr($ISOheader,  864, 17);
 106                 $thisfile_iso_primaryVD_raw['file_structure_version']        = getid3_lib::LittleEndian2Int(substr($ISOheader,  881, 1));
 107                 //$thisfile_iso_primaryVD_raw['unused_4']                      = getid3_lib::LittleEndian2Int(substr($ISOheader,  882, 1));
 108                 $thisfile_iso_primaryVD_raw['application_data']              =                              substr($ISOheader,  883, 512);
 109                 //$thisfile_iso_primaryVD_raw['unused_5']                      =                              substr($ISOheader, 1395, 653);
 110
 111                 $thisfile_iso_primaryVD['system_identifier']             = trim($thisfile_iso_primaryVD_raw['system_identifier']);
 112                 $thisfile_iso_primaryVD['volume_identifier']             = trim($thisfile_iso_primaryVD_raw['volume_identifier']);
 113                 $thisfile_iso_primaryVD['volume_set_identifier']         = trim($thisfile_iso_primaryVD_raw['volume_set_identifier']);
 114                 $thisfile_iso_primaryVD['publisher_identifier']          = trim($thisfile_iso_primaryVD_raw['publisher_identifier']);
 115                 $thisfile_iso_primaryVD['data_preparer_identifier']      = trim($thisfile_iso_primaryVD_raw['data_preparer_identifier']);
 116                 $thisfile_iso_primaryVD['application_identifier']        = trim($thisfile_iso_primaryVD_raw['application_identifier']);
 117                 $thisfile_iso_primaryVD['copyright_file_identifier']     = trim($thisfile_iso_primaryVD_raw['copyright_file_identifier']);
 118                 $thisfile_iso_primaryVD['abstract_file_identifier']      = trim($thisfile_iso_primaryVD_raw['abstract_file_identifier']);
 119                 $thisfile_iso_primaryVD['bibliographic_file_identifier'] = trim($thisfile_iso_primaryVD_raw['bibliographic_file_identifier']);
 120                 $thisfile_iso_primaryVD['volume_creation_date_time']     = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_creation_date_time']);
 121                 $thisfile_iso_primaryVD['volume_modification_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_modification_date_time']);
 122                 $thisfile_iso_primaryVD['volume_expiration_date_time']   = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_expiration_date_time']);
 123                 $thisfile_iso_primaryVD['volume_effective_date_time']    = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_effective_date_time']);
 124
 125                 if (($thisfile_iso_primaryVD_raw['volume_space_size'] * 2048) > $info['filesize']) {
 126                         $this->error('Volume Space Size ('.($thisfile_iso_primaryVD_raw['volume_space_size'] * 2048).' bytes) is larger than the file size ('.$info['filesize'].' bytes) (truncated file?)');
 127                 }
 128
 129                 return true;
 130         }
 131
 132
 133         public function ParseSupplementaryVolumeDescriptor(&$ISOheader) {
 134                 // ISO integer values are stored Both-Endian format!!
 135                 // ie 12345 == 0x3039  is stored as $39 $30 $30 $39 in a 4-byte field
 136
 137                 // shortcuts
 138                 $info = &$this->getid3->info;
 139                 $info['iso']['supplementary_volume_descriptor']['raw'] = array();
 140                 $thisfile_iso_supplementaryVD     = &$info['iso']['supplementary_volume_descriptor'];
 141                 $thisfile_iso_supplementaryVD_raw = &$thisfile_iso_supplementaryVD['raw'];
 142
 143                 $thisfile_iso_supplementaryVD_raw['volume_descriptor_type'] = getid3_lib::LittleEndian2Int(substr($ISOheader,    0, 1));
 144                 $thisfile_iso_supplementaryVD_raw['standard_identifier']    =                  substr($ISOheader,    1, 5);
 145                 if ($thisfile_iso_supplementaryVD_raw['standard_identifier'] != 'CD001') {
 146                         $this->error('Expected "CD001" at offset ('.($thisfile_iso_supplementaryVD['offset'] + 1).'), found "'.$thisfile_iso_supplementaryVD_raw['standard_identifier'].'" instead');
 147                         unset($info['fileformat']);
 148                         unset($info['iso']);
 149                         return false;
 150                 }
 151
 152                 $thisfile_iso_supplementaryVD_raw['volume_descriptor_version'] = getid3_lib::LittleEndian2Int(substr($ISOheader,    6, 1));
 153                 //$thisfile_iso_supplementaryVD_raw['unused_1']                  =                              substr($ISOheader,    7, 1);
 154                 $thisfile_iso_supplementaryVD_raw['system_identifier']         =                              substr($ISOheader,    8, 32);
 155                 $thisfile_iso_supplementaryVD_raw['volume_identifier']         =                              substr($ISOheader,   40, 32);
 156                 //$thisfile_iso_supplementaryVD_raw['unused_2']                  =                              substr($ISOheader,   72, 8);
 157                 $thisfile_iso_supplementaryVD_raw['volume_space_size']         = getid3_lib::LittleEndian2Int(substr($ISOheader,   80, 4));
 158                 if ($thisfile_iso_supplementaryVD_raw['volume_space_size'] == 0) {
 159                         // Supplementary Volume Descriptor not used
 160                         //unset($thisfile_iso_supplementaryVD);
 161                         //return false;
 162                 }
 163
 164                 //$thisfile_iso_supplementaryVD_raw['unused_3']                       =                              substr($ISOheader,   88, 32);
 165                 $thisfile_iso_supplementaryVD_raw['volume_set_size']                = getid3_lib::LittleEndian2Int(substr($ISOheader,  120, 2));
 166                 $thisfile_iso_supplementaryVD_raw['volume_sequence_number']         = getid3_lib::LittleEndian2Int(substr($ISOheader,  124, 2));
 167                 $thisfile_iso_supplementaryVD_raw['logical_block_size']             = getid3_lib::LittleEndian2Int(substr($ISOheader,  128, 2));
 168                 $thisfile_iso_supplementaryVD_raw['path_table_size']                = getid3_lib::LittleEndian2Int(substr($ISOheader,  132, 4));
 169                 $thisfile_iso_supplementaryVD_raw['path_table_l_location']          = getid3_lib::LittleEndian2Int(substr($ISOheader,  140, 2));
 170                 $thisfile_iso_supplementaryVD_raw['path_table_l_opt_location']      = getid3_lib::LittleEndian2Int(substr($ISOheader,  144, 2));
 171                 $thisfile_iso_supplementaryVD_raw['path_table_m_location']          = getid3_lib::LittleEndian2Int(substr($ISOheader,  148, 2));
 172                 $thisfile_iso_supplementaryVD_raw['path_table_m_opt_location']      = getid3_lib::LittleEndian2Int(substr($ISOheader,  152, 2));
 173                 $thisfile_iso_supplementaryVD_raw['root_directory_record']          =                              substr($ISOheader,  156, 34);
 174                 $thisfile_iso_supplementaryVD_raw['volume_set_identifier']          =                              substr($ISOheader,  190, 128);
 175                 $thisfile_iso_supplementaryVD_raw['publisher_identifier']           =                              substr($ISOheader,  318, 128);
 176                 $thisfile_iso_supplementaryVD_raw['data_preparer_identifier']       =                              substr($ISOheader,  446, 128);
 177                 $thisfile_iso_supplementaryVD_raw['application_identifier']         =                              substr($ISOheader,  574, 128);
 178                 $thisfile_iso_supplementaryVD_raw['copyright_file_identifier']      =                              substr($ISOheader,  702, 37);
 179                 $thisfile_iso_supplementaryVD_raw['abstract_file_identifier']       =                              substr($ISOheader,  739, 37);
 180                 $thisfile_iso_supplementaryVD_raw['bibliographic_file_identifier']  =                              substr($ISOheader,  776, 37);
 181                 $thisfile_iso_supplementaryVD_raw['volume_creation_date_time']      =                              substr($ISOheader,  813, 17);
 182                 $thisfile_iso_supplementaryVD_raw['volume_modification_date_time']  =                              substr($ISOheader,  830, 17);
 183                 $thisfile_iso_supplementaryVD_raw['volume_expiration_date_time']    =                              substr($ISOheader,  847, 17);
 184                 $thisfile_iso_supplementaryVD_raw['volume_effective_date_time']     =                              substr($ISOheader,  864, 17);
 185                 $thisfile_iso_supplementaryVD_raw['file_structure_version']         = getid3_lib::LittleEndian2Int(substr($ISOheader,  881, 1));
 186                 //$thisfile_iso_supplementaryVD_raw['unused_4']                       = getid3_lib::LittleEndian2Int(substr($ISOheader,  882, 1));
 187                 $thisfile_iso_supplementaryVD_raw['application_data']               =                              substr($ISOheader,  883, 512);
 188                 //$thisfile_iso_supplementaryVD_raw['unused_5']                       =                              substr($ISOheader, 1395, 653);
 189
 190                 $thisfile_iso_supplementaryVD['system_identifier']              = trim($thisfile_iso_supplementaryVD_raw['system_identifier']);
 191                 $thisfile_iso_supplementaryVD['volume_identifier']              = trim($thisfile_iso_supplementaryVD_raw['volume_identifier']);
 192                 $thisfile_iso_supplementaryVD['volume_set_identifier']          = trim($thisfile_iso_supplementaryVD_raw['volume_set_identifier']);
 193                 $thisfile_iso_supplementaryVD['publisher_identifier']           = trim($thisfile_iso_supplementaryVD_raw['publisher_identifier']);
 194                 $thisfile_iso_supplementaryVD['data_preparer_identifier']       = trim($thisfile_iso_supplementaryVD_raw['data_preparer_identifier']);
 195                 $thisfile_iso_supplementaryVD['application_identifier']         = trim($thisfile_iso_supplementaryVD_raw['application_identifier']);
 196                 $thisfile_iso_supplementaryVD['copyright_file_identifier']      = trim($thisfile_iso_supplementaryVD_raw['copyright_file_identifier']);
 197                 $thisfile_iso_supplementaryVD['abstract_file_identifier']       = trim($thisfile_iso_supplementaryVD_raw['abstract_file_identifier']);
 198                 $thisfile_iso_supplementaryVD['bibliographic_file_identifier']  = trim($thisfile_iso_supplementaryVD_raw['bibliographic_file_identifier']);
 199                 $thisfile_iso_supplementaryVD['volume_creation_date_time']      = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_creation_date_time']);
 200                 $thisfile_iso_supplementaryVD['volume_modification_date_time']  = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_modification_date_time']);
 201                 $thisfile_iso_supplementaryVD['volume_expiration_date_time']    = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_expiration_date_time']);
 202                 $thisfile_iso_supplementaryVD['volume_effective_date_time']     = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_effective_date_time']);
 203
 204                 if (($thisfile_iso_supplementaryVD_raw['volume_space_size'] * $thisfile_iso_supplementaryVD_raw['logical_block_size']) > $info['filesize']) {
 205                         $this->error('Volume Space Size ('.($thisfile_iso_supplementaryVD_raw['volume_space_size'] * $thisfile_iso_supplementaryVD_raw['logical_block_size']).' bytes) is larger than the file size ('.$info['filesize'].' bytes) (truncated file?)');
 206                 }
 207
 208                 return true;
 209         }
 210
 211
 212         public function ParsePathTable() {
 213                 $info = &$this->getid3->info;
 214                 if (!isset($info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location']) && !isset($info['iso']['primary_volume_descriptor']['raw']['path_table_l_location'])) {
 215                         return false;
 216                 }
 217                 if (isset($info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location'])) {
 218                         $PathTableLocation = $info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location'];
 219                         $PathTableSize     = $info['iso']['supplementary_volume_descriptor']['raw']['path_table_size'];
 220                         $TextEncoding      = 'UTF-16BE'; // Big-Endian Unicode
 221                 } else {
 222                         $PathTableLocation = $info['iso']['primary_volume_descriptor']['raw']['path_table_l_location'];
 223                         $PathTableSize     = $info['iso']['primary_volume_descriptor']['raw']['path_table_size'];
 224                         $TextEncoding      = 'ISO-8859-1'; // Latin-1
 225                 }
 226
 227                 if (($PathTableLocation * 2048) > $info['filesize']) {
 228                         $this->error('Path Table Location specifies an offset ('.($PathTableLocation * 2048).') beyond the end-of-file ('.$info['filesize'].')');
 229                         return false;
 230                 }
 231
 232                 $info['iso']['path_table']['offset'] = $PathTableLocation * 2048;
 233                 $this->fseek($info['iso']['path_table']['offset']);
 234                 $info['iso']['path_table']['raw'] = $this->fread($PathTableSize);
 235
 236                 $offset = 0;
 237                 $pathcounter = 1;
 238                 while ($offset < $PathTableSize) {
 239                         // shortcut
 240                         $info['iso']['path_table']['directories'][$pathcounter] = array();
 241                         $thisfile_iso_pathtable_directories_current = &$info['iso']['path_table']['directories'][$pathcounter];
 242
 243                         $thisfile_iso_pathtable_directories_current['length']           = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset, 1));
 244                         $offset += 1;
 245                         $thisfile_iso_pathtable_directories_current['extended_length']  = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset, 1));
 246                         $offset += 1;
 247                         $thisfile_iso_pathtable_directories_current['location_logical'] = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset, 4));
 248                         $offset += 4;
 249                         $thisfile_iso_pathtable_directories_current['parent_directory'] = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset, 2));
 250                         $offset += 2;
 251                         $thisfile_iso_pathtable_directories_current['name']             =                  substr($info['iso']['path_table']['raw'], $offset, $thisfile_iso_pathtable_directories_current['length']);
 252                         $offset += $thisfile_iso_pathtable_directories_current['length'] + ($thisfile_iso_pathtable_directories_current['length'] % 2);
 253
 254                         $thisfile_iso_pathtable_directories_current['name_ascii']       = getid3_lib::iconv_fallback($TextEncoding, $info['encoding'], $thisfile_iso_pathtable_directories_current['name']);
 255
 256                         $thisfile_iso_pathtable_directories_current['location_bytes'] = $thisfile_iso_pathtable_directories_current['location_logical'] * 2048;
 257                         if ($pathcounter == 1) {
 258                                 $thisfile_iso_pathtable_directories_current['full_path'] = '/';
 259                         } else {
 260                                 $thisfile_iso_pathtable_directories_current['full_path'] = $info['iso']['path_table']['directories'][$thisfile_iso_pathtable_directories_current['parent_directory']]['full_path'].$thisfile_iso_pathtable_directories_current['name_ascii'].'/';
 261                         }
 262                         $FullPathArray[] = $thisfile_iso_pathtable_directories_current['full_path'];
 263
 264                         $pathcounter++;
 265                 }
 266
 267                 return true;
 268         }
 269
 270
 271         public function ParseDirectoryRecord($directorydata) {
 272                 $info = &$this->getid3->info;
 273                 if (isset($info['iso']['supplementary_volume_descriptor'])) {
 274                         $TextEncoding = 'UTF-16BE';   // Big-Endian Unicode
 275                 } else {
 276                         $TextEncoding = 'ISO-8859-1'; // Latin-1
 277                 }
 278
 279                 $this->fseek($directorydata['location_bytes']);
 280                 $DirectoryRecordData = $this->fread(1);
 281
 282                 while (ord($DirectoryRecordData{0}) > 33) {
 283
 284                         $DirectoryRecordData .= $this->fread(ord($DirectoryRecordData{0}) - 1);
 285
 286                         $ThisDirectoryRecord['raw']['length']                    = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData,  0, 1));
 287                         $ThisDirectoryRecord['raw']['extended_attribute_length'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData,  1, 1));
 288                         $ThisDirectoryRecord['raw']['offset_logical']            = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData,  2, 4));
 289                         $ThisDirectoryRecord['raw']['filesize']                  = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 10, 4));
 290                         $ThisDirectoryRecord['raw']['recording_date_time']       =                  substr($DirectoryRecordData, 18, 7);
 291                         $ThisDirectoryRecord['raw']['file_flags']                = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 25, 1));
 292                         $ThisDirectoryRecord['raw']['file_unit_size']            = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 26, 1));
 293                         $ThisDirectoryRecord['raw']['interleave_gap_size']       = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 27, 1));
 294                         $ThisDirectoryRecord['raw']['volume_sequence_number']    = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 28, 2));
 295                         $ThisDirectoryRecord['raw']['file_identifier_length']    = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData, 32, 1));
 296                         $ThisDirectoryRecord['raw']['file_identifier']           =                  substr($DirectoryRecordData, 33, $ThisDirectoryRecord['raw']['file_identifier_length']);
 297
 298                         $ThisDirectoryRecord['file_identifier_ascii']            = getid3_lib::iconv_fallback($TextEncoding, $info['encoding'], $ThisDirectoryRecord['raw']['file_identifier']);
 299
 300                         $ThisDirectoryRecord['filesize']                  = $ThisDirectoryRecord['raw']['filesize'];
 301                         $ThisDirectoryRecord['offset_bytes']              = $ThisDirectoryRecord['raw']['offset_logical'] * 2048;
 302                         $ThisDirectoryRecord['file_flags']['hidden']      = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x01);
 303                         $ThisDirectoryRecord['file_flags']['directory']   = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x02);
 304                         $ThisDirectoryRecord['file_flags']['associated']  = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x04);
 305                         $ThisDirectoryRecord['file_flags']['extended']    = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x08);
 306                         $ThisDirectoryRecord['file_flags']['permissions'] = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x10);
 307                         $ThisDirectoryRecord['file_flags']['multiple']    = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x80);
 308                         $ThisDirectoryRecord['recording_timestamp']       = $this->ISOtime2UNIXtime($ThisDirectoryRecord['raw']['recording_date_time']);
 309
 310                         if ($ThisDirectoryRecord['file_flags']['directory']) {
 311                                 $ThisDirectoryRecord['filename'] = $directorydata['full_path'];
 312                         } else {
 313                                 $ThisDirectoryRecord['filename'] = $directorydata['full_path'].$this->ISOstripFilenameVersion($ThisDirectoryRecord['file_identifier_ascii']);
 314                                 $info['iso']['files'] = getid3_lib::array_merge_clobber($info['iso']['files'], getid3_lib::CreateDeepArray($ThisDirectoryRecord['filename'], '/', $ThisDirectoryRecord['filesize']));
 315                         }
 316
 317                         $DirectoryRecord[] = $ThisDirectoryRecord;
 318                         $DirectoryRecordData = $this->fread(1);
 319                 }
 320
 321                 return $DirectoryRecord;
 322         }
 323
 324         public function ISOstripFilenameVersion($ISOfilename) {
 325                 // convert 'filename.ext;1' to 'filename.ext'
 326                 if (!strstr($ISOfilename, ';')) {
 327                         return $ISOfilename;
 328                 } else {
 329                         return substr($ISOfilename, 0, strpos($ISOfilename, ';'));
 330                 }
 331         }
 332
 333         public function ISOtimeText2UNIXtime($ISOtime) {
 334
 335                 $UNIXyear   = (int) substr($ISOtime,  0, 4);
 336                 $UNIXmonth  = (int) substr($ISOtime,  4, 2);
 337                 $UNIXday    = (int) substr($ISOtime,  6, 2);
 338                 $UNIXhour   = (int) substr($ISOtime,  8, 2);
 339                 $UNIXminute = (int) substr($ISOtime, 10, 2);
 340                 $UNIXsecond = (int) substr($ISOtime, 12, 2);
 341
 342                 if (!$UNIXyear) {
 343                         return false;
 344                 }
 345                 return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
 346         }
 347
 348         public function ISOtime2UNIXtime($ISOtime) {
 349                 // Represented by seven bytes:
 350                 // 1: Number of years since 1900
 351                 // 2: Month of the year from 1 to 12
 352                 // 3: Day of the Month from 1 to 31
 353                 // 4: Hour of the day from 0 to 23
 354                 // 5: Minute of the hour from 0 to 59
 355                 // 6: second of the minute from 0 to 59
 356                 // 7: Offset from Greenwich Mean Time in number of 15 minute intervals from -48 (West) to +52 (East)
 357
 358                 $UNIXyear   = ord($ISOtime{0}) + 1900;
 359                 $UNIXmonth  = ord($ISOtime{1});
 360                 $UNIXday    = ord($ISOtime{2});
 361                 $UNIXhour   = ord($ISOtime{3});
 362                 $UNIXminute = ord($ISOtime{4});
 363                 $UNIXsecond = ord($ISOtime{5});
 364                 $GMToffset  = $this->TwosCompliment2Decimal(ord($ISOtime{5}));
 365
 366                 return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
 367         }
 368
 369         public function TwosCompliment2Decimal($BinaryValue) {
 370                 // http://sandbox.mc.edu/~bennet/cs110/tc/tctod.html
 371                 // First check if the number is negative or positive by looking at the sign bit.
 372                 // If it is positive, simply convert it to decimal.
 373                 // If it is negative, make it positive by inverting the bits and adding one.
 374                 // Then, convert the result to decimal.
 375                 // The negative of this number is the value of the original binary.
 376
 377                 if ($BinaryValue & 0x80) {
 378
 379                         // negative number
 380                         return (0 - ((~$BinaryValue & 0xFF) + 1));
 381                 } else {
 382                         // positive number
 383                         return $BinaryValue;
 384                 }
 385         }
 386
 387
 388 }