wp-includes/ID3/module.audio-video.asf.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.audio-video.asf.php                                  //
  12 // module for analyzing ASF, WMA and WMV files                 //
  13 // dependencies: module.audio-video.riff.php                   //
  14 //                                                            ///
  15 /////////////////////////////////////////////////////////////////
  16
  17 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
  18
  19 class getid3_asf extends getid3_handler {
  20
  21         public function __construct(getID3 $getid3) {
  22                 parent::__construct($getid3);  // extends getid3_handler::__construct()
  23
  24                 // initialize all GUID constants
  25                 $GUIDarray = $this->KnownGUIDs();
  26                 foreach ($GUIDarray as $GUIDname => $hexstringvalue) {
  27                         if (!defined($GUIDname)) {
  28                                 define($GUIDname, $this->GUIDtoBytestring($hexstringvalue));
  29                         }
  30                 }
  31         }
  32
  33         public function Analyze() {
  34                 $info = &$this->getid3->info;
  35
  36                 // Shortcuts
  37                 $thisfile_audio = &$info['audio'];
  38                 $thisfile_video = &$info['video'];
  39                 $info['asf']  = array();
  40                 $thisfile_asf = &$info['asf'];
  41                 $thisfile_asf['comments'] = array();
  42                 $thisfile_asf_comments    = &$thisfile_asf['comments'];
  43                 $thisfile_asf['header_object'] = array();
  44                 $thisfile_asf_headerobject     = &$thisfile_asf['header_object'];
  45
  46
  47                 // ASF structure:
  48                 // * Header Object [required]
  49                 //   * File Properties Object [required]   (global file attributes)
  50                 //   * Stream Properties Object [required] (defines media stream & characteristics)
  51                 //   * Header Extension Object [required]  (additional functionality)
  52                 //   * Content Description Object          (bibliographic information)
  53                 //   * Script Command Object               (commands for during playback)
  54                 //   * Marker Object                       (named jumped points within the file)
  55                 // * Data Object [required]
  56                 //   * Data Packets
  57                 // * Index Object
  58
  59                 // Header Object: (mandatory, one only)
  60                 // Field Name                   Field Type   Size (bits)
  61                 // Object ID                    GUID         128             // GUID for header object - GETID3_ASF_Header_Object
  62                 // Object Size                  QWORD        64              // size of header object, including 30 bytes of Header Object header
  63                 // Number of Header Objects     DWORD        32              // number of objects in header object
  64                 // Reserved1                    BYTE         8               // hardcoded: 0x01
  65                 // Reserved2                    BYTE         8               // hardcoded: 0x02
  66
  67                 $info['fileformat'] = 'asf';
  68
  69                 $this->fseek($info['avdataoffset']);
  70                 $HeaderObjectData = $this->fread(30);
  71
  72                 $thisfile_asf_headerobject['objectid']      = substr($HeaderObjectData, 0, 16);
  73                 $thisfile_asf_headerobject['objectid_guid'] = $this->BytestringToGUID($thisfile_asf_headerobject['objectid']);
  74                 if ($thisfile_asf_headerobject['objectid'] != GETID3_ASF_Header_Object) {
  75                         unset($info['fileformat'], $info['asf']);
  76                         return $this->error('ASF header GUID {'.$this->BytestringToGUID($thisfile_asf_headerobject['objectid']).'} does not match expected "GETID3_ASF_Header_Object" GUID {'.$this->BytestringToGUID(GETID3_ASF_Header_Object).'}');
  77                 }
  78                 $thisfile_asf_headerobject['objectsize']    = getid3_lib::LittleEndian2Int(substr($HeaderObjectData, 16, 8));
  79                 $thisfile_asf_headerobject['headerobjects'] = getid3_lib::LittleEndian2Int(substr($HeaderObjectData, 24, 4));
  80                 $thisfile_asf_headerobject['reserved1']     = getid3_lib::LittleEndian2Int(substr($HeaderObjectData, 28, 1));
  81                 $thisfile_asf_headerobject['reserved2']     = getid3_lib::LittleEndian2Int(substr($HeaderObjectData, 29, 1));
  82
  83                 $NextObjectOffset = $this->ftell();
  84                 $ASFHeaderData = $this->fread($thisfile_asf_headerobject['objectsize'] - 30);
  85                 $offset = 0;
  86
  87                 for ($HeaderObjectsCounter = 0; $HeaderObjectsCounter < $thisfile_asf_headerobject['headerobjects']; $HeaderObjectsCounter++) {
  88                         $NextObjectGUID = substr($ASFHeaderData, $offset, 16);
  89                         $offset += 16;
  90                         $NextObjectGUIDtext = $this->BytestringToGUID($NextObjectGUID);
  91                         $NextObjectSize = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
  92                         $offset += 8;
  93                         switch ($NextObjectGUID) {
  94
  95                                 case GETID3_ASF_File_Properties_Object:
  96                                         // File Properties Object: (mandatory, one only)
  97                                         // Field Name                   Field Type   Size (bits)
  98                                         // Object ID                    GUID         128             // GUID for file properties object - GETID3_ASF_File_Properties_Object
  99                                         // Object Size                  QWORD        64              // size of file properties object, including 104 bytes of File Properties Object header
 100                                         // File ID                      GUID         128             // unique ID - identical to File ID in Data Object
 101                                         // File Size                    QWORD        64              // entire file in bytes. Invalid if Broadcast Flag == 1
 102                                         // Creation Date                QWORD        64              // date & time of file creation. Maybe invalid if Broadcast Flag == 1
 103                                         // Data Packets Count           QWORD        64              // number of data packets in Data Object. Invalid if Broadcast Flag == 1
 104                                         // Play Duration                QWORD        64              // playtime, in 100-nanosecond units. Invalid if Broadcast Flag == 1
 105                                         // Send Duration                QWORD        64              // time needed to send file, in 100-nanosecond units. Players can ignore this value. Invalid if Broadcast Flag == 1
 106                                         // Preroll                      QWORD        64              // time to buffer data before starting to play file, in 1-millisecond units. If <> 0, PlayDuration and PresentationTime have been offset by this amount
 107                                         // Flags                        DWORD        32              //
 108                                         // * Broadcast Flag             bits         1  (0x01)       // file is currently being written, some header values are invalid
 109                                         // * Seekable Flag              bits         1  (0x02)       // is file seekable
 110                                         // * Reserved                   bits         30 (0xFFFFFFFC) // reserved - set to zero
 111                                         // Minimum Data Packet Size     DWORD        32              // in bytes. should be same as Maximum Data Packet Size. Invalid if Broadcast Flag == 1
 112                                         // Maximum Data Packet Size     DWORD        32              // in bytes. should be same as Minimum Data Packet Size. Invalid if Broadcast Flag == 1
 113                                         // Maximum Bitrate              DWORD        32              // maximum instantaneous bitrate in bits per second for entire file, including all data streams and ASF overhead
 114
 115                                         // shortcut
 116                                         $thisfile_asf['file_properties_object'] = array();
 117                                         $thisfile_asf_filepropertiesobject      = &$thisfile_asf['file_properties_object'];
 118
 119                                         $thisfile_asf_filepropertiesobject['offset']             = $NextObjectOffset + $offset;
 120                                         $thisfile_asf_filepropertiesobject['objectid']           = $NextObjectGUID;
 121                                         $thisfile_asf_filepropertiesobject['objectid_guid']      = $NextObjectGUIDtext;
 122                                         $thisfile_asf_filepropertiesobject['objectsize']         = $NextObjectSize;
 123                                         $thisfile_asf_filepropertiesobject['fileid']             = substr($ASFHeaderData, $offset, 16);
 124                                         $offset += 16;
 125                                         $thisfile_asf_filepropertiesobject['fileid_guid']        = $this->BytestringToGUID($thisfile_asf_filepropertiesobject['fileid']);
 126                                         $thisfile_asf_filepropertiesobject['filesize']           = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 127                                         $offset += 8;
 128                                         $thisfile_asf_filepropertiesobject['creation_date']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 129                                         $thisfile_asf_filepropertiesobject['creation_date_unix'] = $this->FILETIMEtoUNIXtime($thisfile_asf_filepropertiesobject['creation_date']);
 130                                         $offset += 8;
 131                                         $thisfile_asf_filepropertiesobject['data_packets']       = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 132                                         $offset += 8;
 133                                         $thisfile_asf_filepropertiesobject['play_duration']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 134                                         $offset += 8;
 135                                         $thisfile_asf_filepropertiesobject['send_duration']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 136                                         $offset += 8;
 137                                         $thisfile_asf_filepropertiesobject['preroll']            = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 138                                         $offset += 8;
 139                                         $thisfile_asf_filepropertiesobject['flags_raw']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 140                                         $offset += 4;
 141                                         $thisfile_asf_filepropertiesobject['flags']['broadcast'] = (bool) ($thisfile_asf_filepropertiesobject['flags_raw'] & 0x0001);
 142                                         $thisfile_asf_filepropertiesobject['flags']['seekable']  = (bool) ($thisfile_asf_filepropertiesobject['flags_raw'] & 0x0002);
 143
 144                                         $thisfile_asf_filepropertiesobject['min_packet_size']    = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 145                                         $offset += 4;
 146                                         $thisfile_asf_filepropertiesobject['max_packet_size']    = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 147                                         $offset += 4;
 148                                         $thisfile_asf_filepropertiesobject['max_bitrate']        = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 149                                         $offset += 4;
 150
 151                                         if ($thisfile_asf_filepropertiesobject['flags']['broadcast']) {
 152
 153                                                 // broadcast flag is set, some values invalid
 154                                                 unset($thisfile_asf_filepropertiesobject['filesize']);
 155                                                 unset($thisfile_asf_filepropertiesobject['data_packets']);
 156                                                 unset($thisfile_asf_filepropertiesobject['play_duration']);
 157                                                 unset($thisfile_asf_filepropertiesobject['send_duration']);
 158                                                 unset($thisfile_asf_filepropertiesobject['min_packet_size']);
 159                                                 unset($thisfile_asf_filepropertiesobject['max_packet_size']);
 160
 161                                         } else {
 162
 163                                                 // broadcast flag NOT set, perform calculations
 164                                                 $info['playtime_seconds'] = ($thisfile_asf_filepropertiesobject['play_duration'] / 10000000) - ($thisfile_asf_filepropertiesobject['preroll'] / 1000);
 165
 166                                                 //$info['bitrate'] = $thisfile_asf_filepropertiesobject['max_bitrate'];
 167                                                 $info['bitrate'] = ((isset($thisfile_asf_filepropertiesobject['filesize']) ? $thisfile_asf_filepropertiesobject['filesize'] : $info['filesize']) * 8) / $info['playtime_seconds'];
 168                                         }
 169                                         break;
 170
 171                                 case GETID3_ASF_Stream_Properties_Object:
 172                                         // Stream Properties Object: (mandatory, one per media stream)
 173                                         // Field Name                   Field Type   Size (bits)
 174                                         // Object ID                    GUID         128             // GUID for stream properties object - GETID3_ASF_Stream_Properties_Object
 175                                         // Object Size                  QWORD        64              // size of stream properties object, including 78 bytes of Stream Properties Object header
 176                                         // Stream Type                  GUID         128             // GETID3_ASF_Audio_Media, GETID3_ASF_Video_Media or GETID3_ASF_Command_Media
 177                                         // Error Correction Type        GUID         128             // GETID3_ASF_Audio_Spread for audio-only streams, GETID3_ASF_No_Error_Correction for other stream types
 178                                         // Time Offset                  QWORD        64              // 100-nanosecond units. typically zero. added to all timestamps of samples in the stream
 179                                         // Type-Specific Data Length    DWORD        32              // number of bytes for Type-Specific Data field
 180                                         // Error Correction Data Length DWORD        32              // number of bytes for Error Correction Data field
 181                                         // Flags                        WORD         16              //
 182                                         // * Stream Number              bits         7 (0x007F)      // number of this stream.  1 <= valid <= 127
 183                                         // * Reserved                   bits         8 (0x7F80)      // reserved - set to zero
 184                                         // * Encrypted Content Flag     bits         1 (0x8000)      // stream contents encrypted if set
 185                                         // Reserved                     DWORD        32              // reserved - set to zero
 186                                         // Type-Specific Data           BYTESTREAM   variable        // type-specific format data, depending on value of Stream Type
 187                                         // Error Correction Data        BYTESTREAM   variable        // error-correction-specific format data, depending on value of Error Correct Type
 188
 189                                         // There is one GETID3_ASF_Stream_Properties_Object for each stream (audio, video) but the
 190                                         // stream number isn't known until halfway through decoding the structure, hence it
 191                                         // it is decoded to a temporary variable and then stuck in the appropriate index later
 192
 193                                         $StreamPropertiesObjectData['offset']             = $NextObjectOffset + $offset;
 194                                         $StreamPropertiesObjectData['objectid']           = $NextObjectGUID;
 195                                         $StreamPropertiesObjectData['objectid_guid']      = $NextObjectGUIDtext;
 196                                         $StreamPropertiesObjectData['objectsize']         = $NextObjectSize;
 197                                         $StreamPropertiesObjectData['stream_type']        = substr($ASFHeaderData, $offset, 16);
 198                                         $offset += 16;
 199                                         $StreamPropertiesObjectData['stream_type_guid']   = $this->BytestringToGUID($StreamPropertiesObjectData['stream_type']);
 200                                         $StreamPropertiesObjectData['error_correct_type'] = substr($ASFHeaderData, $offset, 16);
 201                                         $offset += 16;
 202                                         $StreamPropertiesObjectData['error_correct_guid'] = $this->BytestringToGUID($StreamPropertiesObjectData['error_correct_type']);
 203                                         $StreamPropertiesObjectData['time_offset']        = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 204                                         $offset += 8;
 205                                         $StreamPropertiesObjectData['type_data_length']   = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 206                                         $offset += 4;
 207                                         $StreamPropertiesObjectData['error_data_length']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 208                                         $offset += 4;
 209                                         $StreamPropertiesObjectData['flags_raw']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 210                                         $offset += 2;
 211                                         $StreamPropertiesObjectStreamNumber               = $StreamPropertiesObjectData['flags_raw'] & 0x007F;
 212                                         $StreamPropertiesObjectData['flags']['encrypted'] = (bool) ($StreamPropertiesObjectData['flags_raw'] & 0x8000);
 213
 214                                         $offset += 4; // reserved - DWORD
 215                                         $StreamPropertiesObjectData['type_specific_data'] = substr($ASFHeaderData, $offset, $StreamPropertiesObjectData['type_data_length']);
 216                                         $offset += $StreamPropertiesObjectData['type_data_length'];
 217                                         $StreamPropertiesObjectData['error_correct_data'] = substr($ASFHeaderData, $offset, $StreamPropertiesObjectData['error_data_length']);
 218                                         $offset += $StreamPropertiesObjectData['error_data_length'];
 219
 220                                         switch ($StreamPropertiesObjectData['stream_type']) {
 221
 222                                                 case GETID3_ASF_Audio_Media:
 223                                                         $thisfile_audio['dataformat']   = (!empty($thisfile_audio['dataformat'])   ? $thisfile_audio['dataformat']   : 'asf');
 224                                                         $thisfile_audio['bitrate_mode'] = (!empty($thisfile_audio['bitrate_mode']) ? $thisfile_audio['bitrate_mode'] : 'cbr');
 225
 226                                                         $audiodata = getid3_riff::parseWAVEFORMATex(substr($StreamPropertiesObjectData['type_specific_data'], 0, 16));
 227                                                         unset($audiodata['raw']);
 228                                                         $thisfile_audio = getid3_lib::array_merge_noclobber($audiodata, $thisfile_audio);
 229                                                         break;
 230
 231                                                 case GETID3_ASF_Video_Media:
 232                                                         $thisfile_video['dataformat']   = (!empty($thisfile_video['dataformat'])   ? $thisfile_video['dataformat']   : 'asf');
 233                                                         $thisfile_video['bitrate_mode'] = (!empty($thisfile_video['bitrate_mode']) ? $thisfile_video['bitrate_mode'] : 'cbr');
 234                                                         break;
 235
 236                                                 case GETID3_ASF_Command_Media:
 237                                                 default:
 238                                                         // do nothing
 239                                                         break;
 240
 241                                         }
 242
 243                                         $thisfile_asf['stream_properties_object'][$StreamPropertiesObjectStreamNumber] = $StreamPropertiesObjectData;
 244                                         unset($StreamPropertiesObjectData); // clear for next stream, if any
 245                                         break;
 246
 247                                 case GETID3_ASF_Header_Extension_Object:
 248                                         // Header Extension Object: (mandatory, one only)
 249                                         // Field Name                   Field Type   Size (bits)
 250                                         // Object ID                    GUID         128             // GUID for Header Extension object - GETID3_ASF_Header_Extension_Object
 251                                         // Object Size                  QWORD        64              // size of Header Extension object, including 46 bytes of Header Extension Object header
 252                                         // Reserved Field 1             GUID         128             // hardcoded: GETID3_ASF_Reserved_1
 253                                         // Reserved Field 2             WORD         16              // hardcoded: 0x00000006
 254                                         // Header Extension Data Size   DWORD        32              // in bytes. valid: 0, or > 24. equals object size minus 46
 255                                         // Header Extension Data        BYTESTREAM   variable        // array of zero or more extended header objects
 256
 257                                         // shortcut
 258                                         $thisfile_asf['header_extension_object'] = array();
 259                                         $thisfile_asf_headerextensionobject      = &$thisfile_asf['header_extension_object'];
 260
 261                                         $thisfile_asf_headerextensionobject['offset']              = $NextObjectOffset + $offset;
 262                                         $thisfile_asf_headerextensionobject['objectid']            = $NextObjectGUID;
 263                                         $thisfile_asf_headerextensionobject['objectid_guid']       = $NextObjectGUIDtext;
 264                                         $thisfile_asf_headerextensionobject['objectsize']          = $NextObjectSize;
 265                                         $thisfile_asf_headerextensionobject['reserved_1']          = substr($ASFHeaderData, $offset, 16);
 266                                         $offset += 16;
 267                                         $thisfile_asf_headerextensionobject['reserved_1_guid']     = $this->BytestringToGUID($thisfile_asf_headerextensionobject['reserved_1']);
 268                                         if ($thisfile_asf_headerextensionobject['reserved_1'] != GETID3_ASF_Reserved_1) {
 269                                                 $info['warning'][] = 'header_extension_object.reserved_1 GUID ('.$this->BytestringToGUID($thisfile_asf_headerextensionobject['reserved_1']).') does not match expected "GETID3_ASF_Reserved_1" GUID ('.$this->BytestringToGUID(GETID3_ASF_Reserved_1).')';
 270                                                 //return false;
 271                                                 break;
 272                                         }
 273                                         $thisfile_asf_headerextensionobject['reserved_2']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 274                                         $offset += 2;
 275                                         if ($thisfile_asf_headerextensionobject['reserved_2'] != 6) {
 276                                                 $info['warning'][] = 'header_extension_object.reserved_2 ('.getid3_lib::PrintHexBytes($thisfile_asf_headerextensionobject['reserved_2']).') does not match expected value of "6"';
 277                                                 //return false;
 278                                                 break;
 279                                         }
 280                                         $thisfile_asf_headerextensionobject['extension_data_size'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 281                                         $offset += 4;
 282                                         $thisfile_asf_headerextensionobject['extension_data']      =                              substr($ASFHeaderData, $offset, $thisfile_asf_headerextensionobject['extension_data_size']);
 283                                         $unhandled_sections = 0;
 284                                         $thisfile_asf_headerextensionobject['extension_data_parsed'] = $this->HeaderExtensionObjectDataParse($thisfile_asf_headerextensionobject['extension_data'], $unhandled_sections);
 285                                         if ($unhandled_sections === 0) {
 286                                                 unset($thisfile_asf_headerextensionobject['extension_data']);
 287                                         }
 288                                         $offset += $thisfile_asf_headerextensionobject['extension_data_size'];
 289                                         break;
 290
 291                                 case GETID3_ASF_Codec_List_Object:
 292                                         // Codec List Object: (optional, one only)
 293                                         // Field Name                   Field Type   Size (bits)
 294                                         // Object ID                    GUID         128             // GUID for Codec List object - GETID3_ASF_Codec_List_Object
 295                                         // Object Size                  QWORD        64              // size of Codec List object, including 44 bytes of Codec List Object header
 296                                         // Reserved                     GUID         128             // hardcoded: 86D15241-311D-11D0-A3A4-00A0C90348F6
 297                                         // Codec Entries Count          DWORD        32              // number of entries in Codec Entries array
 298                                         // Codec Entries                array of:    variable        //
 299                                         // * Type                       WORD         16              // 0x0001 = Video Codec, 0x0002 = Audio Codec, 0xFFFF = Unknown Codec
 300                                         // * Codec Name Length          WORD         16              // number of Unicode characters stored in the Codec Name field
 301                                         // * Codec Name                 WCHAR        variable        // array of Unicode characters - name of codec used to create the content
 302                                         // * Codec Description Length   WORD         16              // number of Unicode characters stored in the Codec Description field
 303                                         // * Codec Description          WCHAR        variable        // array of Unicode characters - description of format used to create the content
 304                                         // * Codec Information Length   WORD         16              // number of Unicode characters stored in the Codec Information field
 305                                         // * Codec Information          BYTESTREAM   variable        // opaque array of information bytes about the codec used to create the content
 306
 307                                         // shortcut
 308                                         $thisfile_asf['codec_list_object'] = array();
 309                                         $thisfile_asf_codeclistobject      = &$thisfile_asf['codec_list_object'];
 310
 311                                         $thisfile_asf_codeclistobject['offset']                    = $NextObjectOffset + $offset;
 312                                         $thisfile_asf_codeclistobject['objectid']                  = $NextObjectGUID;
 313                                         $thisfile_asf_codeclistobject['objectid_guid']             = $NextObjectGUIDtext;
 314                                         $thisfile_asf_codeclistobject['objectsize']                = $NextObjectSize;
 315                                         $thisfile_asf_codeclistobject['reserved']                  = substr($ASFHeaderData, $offset, 16);
 316                                         $offset += 16;
 317                                         $thisfile_asf_codeclistobject['reserved_guid']             = $this->BytestringToGUID($thisfile_asf_codeclistobject['reserved']);
 318                                         if ($thisfile_asf_codeclistobject['reserved'] != $this->GUIDtoBytestring('86D15241-311D-11D0-A3A4-00A0C90348F6')) {
 319                                                 $info['warning'][] = 'codec_list_object.reserved GUID {'.$this->BytestringToGUID($thisfile_asf_codeclistobject['reserved']).'} does not match expected "GETID3_ASF_Reserved_1" GUID {86D15241-311D-11D0-A3A4-00A0C90348F6}';
 320                                                 //return false;
 321                                                 break;
 322                                         }
 323                                         $thisfile_asf_codeclistobject['codec_entries_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 324                                         $offset += 4;
 325                                         for ($CodecEntryCounter = 0; $CodecEntryCounter < $thisfile_asf_codeclistobject['codec_entries_count']; $CodecEntryCounter++) {
 326                                                 // shortcut
 327                                                 $thisfile_asf_codeclistobject['codec_entries'][$CodecEntryCounter] = array();
 328                                                 $thisfile_asf_codeclistobject_codecentries_current = &$thisfile_asf_codeclistobject['codec_entries'][$CodecEntryCounter];
 329
 330                                                 $thisfile_asf_codeclistobject_codecentries_current['type_raw'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 331                                                 $offset += 2;
 332                                                 $thisfile_asf_codeclistobject_codecentries_current['type'] = self::codecListObjectTypeLookup($thisfile_asf_codeclistobject_codecentries_current['type_raw']);
 333
 334                                                 $CodecNameLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2)) * 2; // 2 bytes per character
 335                                                 $offset += 2;
 336                                                 $thisfile_asf_codeclistobject_codecentries_current['name'] = substr($ASFHeaderData, $offset, $CodecNameLength);
 337                                                 $offset += $CodecNameLength;
 338
 339                                                 $CodecDescriptionLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2)) * 2; // 2 bytes per character
 340                                                 $offset += 2;
 341                                                 $thisfile_asf_codeclistobject_codecentries_current['description'] = substr($ASFHeaderData, $offset, $CodecDescriptionLength);
 342                                                 $offset += $CodecDescriptionLength;
 343
 344                                                 $CodecInformationLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 345                                                 $offset += 2;
 346                                                 $thisfile_asf_codeclistobject_codecentries_current['information'] = substr($ASFHeaderData, $offset, $CodecInformationLength);
 347                                                 $offset += $CodecInformationLength;
 348
 349                                                 if ($thisfile_asf_codeclistobject_codecentries_current['type_raw'] == 2) { // audio codec
 350
 351                                                         if (strpos($thisfile_asf_codeclistobject_codecentries_current['description'], ',') === false) {
 352                                                                 $info['warning'][] = '[asf][codec_list_object][codec_entries]['.$CodecEntryCounter.'][description] expected to contain comma-seperated list of parameters: "'.$thisfile_asf_codeclistobject_codecentries_current['description'].'"';
 353                                                         } else {
 354
 355                                                                 list($AudioCodecBitrate, $AudioCodecFrequency, $AudioCodecChannels) = explode(',', $this->TrimConvert($thisfile_asf_codeclistobject_codecentries_current['description']));
 356                                                                 $thisfile_audio['codec'] = $this->TrimConvert($thisfile_asf_codeclistobject_codecentries_current['name']);
 357
 358                                                                 if (!isset($thisfile_audio['bitrate']) && strstr($AudioCodecBitrate, 'kbps')) {
 359                                                                         $thisfile_audio['bitrate'] = (int) (trim(str_replace('kbps', '', $AudioCodecBitrate)) * 1000);
 360                                                                 }
 361                                                                 //if (!isset($thisfile_video['bitrate']) && isset($thisfile_audio['bitrate']) && isset($thisfile_asf['file_properties_object']['max_bitrate']) && ($thisfile_asf_codeclistobject['codec_entries_count'] > 1)) {
 362                                                                 if (empty($thisfile_video['bitrate']) && !empty($thisfile_audio['bitrate']) && !empty($info['bitrate'])) {
 363                                                                         //$thisfile_video['bitrate'] = $thisfile_asf['file_properties_object']['max_bitrate'] - $thisfile_audio['bitrate'];
 364                                                                         $thisfile_video['bitrate'] = $info['bitrate'] - $thisfile_audio['bitrate'];
 365                                                                 }
 366
 367                                                                 $AudioCodecFrequency = (int) trim(str_replace('kHz', '', $AudioCodecFrequency));
 368                                                                 switch ($AudioCodecFrequency) {
 369                                                                         case 8:
 370                                                                         case 8000:
 371                                                                                 $thisfile_audio['sample_rate'] = 8000;
 372                                                                                 break;
 373
 374                                                                         case 11:
 375                                                                         case 11025:
 376                                                                                 $thisfile_audio['sample_rate'] = 11025;
 377                                                                                 break;
 378
 379                                                                         case 12:
 380                                                                         case 12000:
 381                                                                                 $thisfile_audio['sample_rate'] = 12000;
 382                                                                                 break;
 383
 384                                                                         case 16:
 385                                                                         case 16000:
 386                                                                                 $thisfile_audio['sample_rate'] = 16000;
 387                                                                                 break;
 388
 389                                                                         case 22:
 390                                                                         case 22050:
 391                                                                                 $thisfile_audio['sample_rate'] = 22050;
 392                                                                                 break;
 393
 394                                                                         case 24:
 395                                                                         case 24000:
 396                                                                                 $thisfile_audio['sample_rate'] = 24000;
 397                                                                                 break;
 398
 399                                                                         case 32:
 400                                                                         case 32000:
 401                                                                                 $thisfile_audio['sample_rate'] = 32000;
 402                                                                                 break;
 403
 404                                                                         case 44:
 405                                                                         case 441000:
 406                                                                                 $thisfile_audio['sample_rate'] = 44100;
 407                                                                                 break;
 408
 409                                                                         case 48:
 410                                                                         case 48000:
 411                                                                                 $thisfile_audio['sample_rate'] = 48000;
 412                                                                                 break;
 413
 414                                                                         default:
 415                                                                                 $info['warning'][] = 'unknown frequency: "'.$AudioCodecFrequency.'" ('.$this->TrimConvert($thisfile_asf_codeclistobject_codecentries_current['description']).')';
 416                                                                                 break;
 417                                                                 }
 418
 419                                                                 if (!isset($thisfile_audio['channels'])) {
 420                                                                         if (strstr($AudioCodecChannels, 'stereo')) {
 421                                                                                 $thisfile_audio['channels'] = 2;
 422                                                                         } elseif (strstr($AudioCodecChannels, 'mono')) {
 423                                                                                 $thisfile_audio['channels'] = 1;
 424                                                                         }
 425                                                                 }
 426
 427                                                         }
 428                                                 }
 429                                         }
 430                                         break;
 431
 432                                 case GETID3_ASF_Script_Command_Object:
 433                                         // Script Command Object: (optional, one only)
 434                                         // Field Name                   Field Type   Size (bits)
 435                                         // Object ID                    GUID         128             // GUID for Script Command object - GETID3_ASF_Script_Command_Object
 436                                         // Object Size                  QWORD        64              // size of Script Command object, including 44 bytes of Script Command Object header
 437                                         // Reserved                     GUID         128             // hardcoded: 4B1ACBE3-100B-11D0-A39B-00A0C90348F6
 438                                         // Commands Count               WORD         16              // number of Commands structures in the Script Commands Objects
 439                                         // Command Types Count          WORD         16              // number of Command Types structures in the Script Commands Objects
 440                                         // Command Types                array of:    variable        //
 441                                         // * Command Type Name Length   WORD         16              // number of Unicode characters for Command Type Name
 442                                         // * Command Type Name          WCHAR        variable        // array of Unicode characters - name of a type of command
 443                                         // Commands                     array of:    variable        //
 444                                         // * Presentation Time          DWORD        32              // presentation time of that command, in milliseconds
 445                                         // * Type Index                 WORD         16              // type of this command, as a zero-based index into the array of Command Types of this object
 446                                         // * Command Name Length        WORD         16              // number of Unicode characters for Command Name
 447                                         // * Command Name               WCHAR        variable        // array of Unicode characters - name of this command
 448
 449                                         // shortcut
 450                                         $thisfile_asf['script_command_object'] = array();
 451                                         $thisfile_asf_scriptcommandobject      = &$thisfile_asf['script_command_object'];
 452
 453                                         $thisfile_asf_scriptcommandobject['offset']               = $NextObjectOffset + $offset;
 454                                         $thisfile_asf_scriptcommandobject['objectid']             = $NextObjectGUID;
 455                                         $thisfile_asf_scriptcommandobject['objectid_guid']        = $NextObjectGUIDtext;
 456                                         $thisfile_asf_scriptcommandobject['objectsize']           = $NextObjectSize;
 457                                         $thisfile_asf_scriptcommandobject['reserved']             = substr($ASFHeaderData, $offset, 16);
 458                                         $offset += 16;
 459                                         $thisfile_asf_scriptcommandobject['reserved_guid']        = $this->BytestringToGUID($thisfile_asf_scriptcommandobject['reserved']);
 460                                         if ($thisfile_asf_scriptcommandobject['reserved'] != $this->GUIDtoBytestring('4B1ACBE3-100B-11D0-A39B-00A0C90348F6')) {
 461                                                 $info['warning'][] = 'script_command_object.reserved GUID {'.$this->BytestringToGUID($thisfile_asf_scriptcommandobject['reserved']).'} does not match expected "GETID3_ASF_Reserved_1" GUID {4B1ACBE3-100B-11D0-A39B-00A0C90348F6}';
 462                                                 //return false;
 463                                                 break;
 464                                         }
 465                                         $thisfile_asf_scriptcommandobject['commands_count']       = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 466                                         $offset += 2;
 467                                         $thisfile_asf_scriptcommandobject['command_types_count']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 468                                         $offset += 2;
 469                                         for ($CommandTypesCounter = 0; $CommandTypesCounter < $thisfile_asf_scriptcommandobject['command_types_count']; $CommandTypesCounter++) {
 470                                                 $CommandTypeNameLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2)) * 2; // 2 bytes per character
 471                                                 $offset += 2;
 472                                                 $thisfile_asf_scriptcommandobject['command_types'][$CommandTypesCounter]['name'] = substr($ASFHeaderData, $offset, $CommandTypeNameLength);
 473                                                 $offset += $CommandTypeNameLength;
 474                                         }
 475                                         for ($CommandsCounter = 0; $CommandsCounter < $thisfile_asf_scriptcommandobject['commands_count']; $CommandsCounter++) {
 476                                                 $thisfile_asf_scriptcommandobject['commands'][$CommandsCounter]['presentation_time']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 477                                                 $offset += 4;
 478                                                 $thisfile_asf_scriptcommandobject['commands'][$CommandsCounter]['type_index']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 479                                                 $offset += 2;
 480
 481                                                 $CommandTypeNameLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2)) * 2; // 2 bytes per character
 482                                                 $offset += 2;
 483                                                 $thisfile_asf_scriptcommandobject['commands'][$CommandsCounter]['name'] = substr($ASFHeaderData, $offset, $CommandTypeNameLength);
 484                                                 $offset += $CommandTypeNameLength;
 485                                         }
 486                                         break;
 487
 488                                 case GETID3_ASF_Marker_Object:
 489                                         // Marker Object: (optional, one only)
 490                                         // Field Name                   Field Type   Size (bits)
 491                                         // Object ID                    GUID         128             // GUID for Marker object - GETID3_ASF_Marker_Object
 492                                         // Object Size                  QWORD        64              // size of Marker object, including 48 bytes of Marker Object header
 493                                         // Reserved                     GUID         128             // hardcoded: 4CFEDB20-75F6-11CF-9C0F-00A0C90349CB
 494                                         // Markers Count                DWORD        32              // number of Marker structures in Marker Object
 495                                         // Reserved                     WORD         16              // hardcoded: 0x0000
 496                                         // Name Length                  WORD         16              // number of bytes in the Name field
 497                                         // Name                         WCHAR        variable        // name of the Marker Object
 498                                         // Markers                      array of:    variable        //
 499                                         // * Offset                     QWORD        64              // byte offset into Data Object
 500                                         // * Presentation Time          QWORD        64              // in 100-nanosecond units
 501                                         // * Entry Length               WORD         16              // length in bytes of (Send Time + Flags + Marker Description Length + Marker Description + Padding)
 502                                         // * Send Time                  DWORD        32              // in milliseconds
 503                                         // * Flags                      DWORD        32              // hardcoded: 0x00000000
 504                                         // * Marker Description Length  DWORD        32              // number of bytes in Marker Description field
 505                                         // * Marker Description         WCHAR        variable        // array of Unicode characters - description of marker entry
 506                                         // * Padding                    BYTESTREAM   variable        // optional padding bytes
 507
 508                                         // shortcut
 509                                         $thisfile_asf['marker_object'] = array();
 510                                         $thisfile_asf_markerobject     = &$thisfile_asf['marker_object'];
 511
 512                                         $thisfile_asf_markerobject['offset']               = $NextObjectOffset + $offset;
 513                                         $thisfile_asf_markerobject['objectid']             = $NextObjectGUID;
 514                                         $thisfile_asf_markerobject['objectid_guid']        = $NextObjectGUIDtext;
 515                                         $thisfile_asf_markerobject['objectsize']           = $NextObjectSize;
 516                                         $thisfile_asf_markerobject['reserved']             = substr($ASFHeaderData, $offset, 16);
 517                                         $offset += 16;
 518                                         $thisfile_asf_markerobject['reserved_guid']        = $this->BytestringToGUID($thisfile_asf_markerobject['reserved']);
 519                                         if ($thisfile_asf_markerobject['reserved'] != $this->GUIDtoBytestring('4CFEDB20-75F6-11CF-9C0F-00A0C90349CB')) {
 520                                                 $info['warning'][] = 'marker_object.reserved GUID {'.$this->BytestringToGUID($thisfile_asf_markerobject['reserved_1']).'} does not match expected "GETID3_ASF_Reserved_1" GUID {4CFEDB20-75F6-11CF-9C0F-00A0C90349CB}';
 521                                                 break;
 522                                         }
 523                                         $thisfile_asf_markerobject['markers_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 524                                         $offset += 4;
 525                                         $thisfile_asf_markerobject['reserved_2'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 526                                         $offset += 2;
 527                                         if ($thisfile_asf_markerobject['reserved_2'] != 0) {
 528                                                 $info['warning'][] = 'marker_object.reserved_2 ('.getid3_lib::PrintHexBytes($thisfile_asf_markerobject['reserved_2']).') does not match expected value of "0"';
 529                                                 break;
 530                                         }
 531                                         $thisfile_asf_markerobject['name_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 532                                         $offset += 2;
 533                                         $thisfile_asf_markerobject['name'] = substr($ASFHeaderData, $offset, $thisfile_asf_markerobject['name_length']);
 534                                         $offset += $thisfile_asf_markerobject['name_length'];
 535                                         for ($MarkersCounter = 0; $MarkersCounter < $thisfile_asf_markerobject['markers_count']; $MarkersCounter++) {
 536                                                 $thisfile_asf_markerobject['markers'][$MarkersCounter]['offset']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 537                                                 $offset += 8;
 538                                                 $thisfile_asf_markerobject['markers'][$MarkersCounter]['presentation_time']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
 539                                                 $offset += 8;
 540                                                 $thisfile_asf_markerobject['markers'][$MarkersCounter]['entry_length']              = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 541                                                 $offset += 2;
 542                                                 $thisfile_asf_markerobject['markers'][$MarkersCounter]['send_time']                 = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 543                                                 $offset += 4;
 544                                                 $thisfile_asf_markerobject['markers'][$MarkersCounter]['flags']                     = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 545                                                 $offset += 4;
 546                                                 $thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 547                                                 $offset += 4;
 548                                                 $thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description']        = substr($ASFHeaderData, $offset, $thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description_length']);
 549                                                 $offset += $thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description_length'];
 550                                                 $PaddingLength = $thisfile_asf_markerobject['markers'][$MarkersCounter]['entry_length'] - 4 -  4 - 4 - $thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description_length'];
 551                                                 if ($PaddingLength > 0) {
 552                                                         $thisfile_asf_markerobject['markers'][$MarkersCounter]['padding']               = substr($ASFHeaderData, $offset, $PaddingLength);
 553                                                         $offset += $PaddingLength;
 554                                                 }
 555                                         }
 556                                         break;
 557
 558                                 case GETID3_ASF_Bitrate_Mutual_Exclusion_Object:
 559                                         // Bitrate Mutual Exclusion Object: (optional)
 560                                         // Field Name                   Field Type   Size (bits)
 561                                         // Object ID                    GUID         128             // GUID for Bitrate Mutual Exclusion object - GETID3_ASF_Bitrate_Mutual_Exclusion_Object
 562                                         // Object Size                  QWORD        64              // size of Bitrate Mutual Exclusion object, including 42 bytes of Bitrate Mutual Exclusion Object header
 563                                         // Exlusion Type                GUID         128             // nature of mutual exclusion relationship. one of: (GETID3_ASF_Mutex_Bitrate, GETID3_ASF_Mutex_Unknown)
 564                                         // Stream Numbers Count         WORD         16              // number of video streams
 565                                         // Stream Numbers               WORD         variable        // array of mutually exclusive video stream numbers. 1 <= valid <= 127
 566
 567                                         // shortcut
 568                                         $thisfile_asf['bitrate_mutual_exclusion_object'] = array();
 569                                         $thisfile_asf_bitratemutualexclusionobject       = &$thisfile_asf['bitrate_mutual_exclusion_object'];
 570
 571                                         $thisfile_asf_bitratemutualexclusionobject['offset']               = $NextObjectOffset + $offset;
 572                                         $thisfile_asf_bitratemutualexclusionobject['objectid']             = $NextObjectGUID;
 573                                         $thisfile_asf_bitratemutualexclusionobject['objectid_guid']        = $NextObjectGUIDtext;
 574                                         $thisfile_asf_bitratemutualexclusionobject['objectsize']           = $NextObjectSize;
 575                                         $thisfile_asf_bitratemutualexclusionobject['reserved']             = substr($ASFHeaderData, $offset, 16);
 576                                         $thisfile_asf_bitratemutualexclusionobject['reserved_guid']        = $this->BytestringToGUID($thisfile_asf_bitratemutualexclusionobject['reserved']);
 577                                         $offset += 16;
 578                                         if (($thisfile_asf_bitratemutualexclusionobject['reserved'] != GETID3_ASF_Mutex_Bitrate) && ($thisfile_asf_bitratemutualexclusionobject['reserved'] != GETID3_ASF_Mutex_Unknown)) {
 579                                                 $info['warning'][] = 'bitrate_mutual_exclusion_object.reserved GUID {'.$this->BytestringToGUID($thisfile_asf_bitratemutualexclusionobject['reserved']).'} does not match expected "GETID3_ASF_Mutex_Bitrate" GUID {'.$this->BytestringToGUID(GETID3_ASF_Mutex_Bitrate).'} or  "GETID3_ASF_Mutex_Unknown" GUID {'.$this->BytestringToGUID(GETID3_ASF_Mutex_Unknown).'}';
 580                                                 //return false;
 581                                                 break;
 582                                         }
 583                                         $thisfile_asf_bitratemutualexclusionobject['stream_numbers_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 584                                         $offset += 2;
 585                                         for ($StreamNumberCounter = 0; $StreamNumberCounter < $thisfile_asf_bitratemutualexclusionobject['stream_numbers_count']; $StreamNumberCounter++) {
 586                                                 $thisfile_asf_bitratemutualexclusionobject['stream_numbers'][$StreamNumberCounter] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 587                                                 $offset += 2;
 588                                         }
 589                                         break;
 590
 591                                 case GETID3_ASF_Error_Correction_Object:
 592                                         // Error Correction Object: (optional, one only)
 593                                         // Field Name                   Field Type   Size (bits)
 594                                         // Object ID                    GUID         128             // GUID for Error Correction object - GETID3_ASF_Error_Correction_Object
 595                                         // Object Size                  QWORD        64              // size of Error Correction object, including 44 bytes of Error Correction Object header
 596                                         // Error Correction Type        GUID         128             // type of error correction. one of: (GETID3_ASF_No_Error_Correction, GETID3_ASF_Audio_Spread)
 597                                         // Error Correction Data Length DWORD        32              // number of bytes in Error Correction Data field
 598                                         // Error Correction Data        BYTESTREAM   variable        // structure depends on value of Error Correction Type field
 599
 600                                         // shortcut
 601                                         $thisfile_asf['error_correction_object'] = array();
 602                                         $thisfile_asf_errorcorrectionobject      = &$thisfile_asf['error_correction_object'];
 603
 604                                         $thisfile_asf_errorcorrectionobject['offset']                = $NextObjectOffset + $offset;
 605                                         $thisfile_asf_errorcorrectionobject['objectid']              = $NextObjectGUID;
 606                                         $thisfile_asf_errorcorrectionobject['objectid_guid']         = $NextObjectGUIDtext;
 607                                         $thisfile_asf_errorcorrectionobject['objectsize']            = $NextObjectSize;
 608                                         $thisfile_asf_errorcorrectionobject['error_correction_type'] = substr($ASFHeaderData, $offset, 16);
 609                                         $offset += 16;
 610                                         $thisfile_asf_errorcorrectionobject['error_correction_guid'] = $this->BytestringToGUID($thisfile_asf_errorcorrectionobject['error_correction_type']);
 611                                         $thisfile_asf_errorcorrectionobject['error_correction_data_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 612                                         $offset += 4;
 613                                         switch ($thisfile_asf_errorcorrectionobject['error_correction_type']) {
 614                                                 case GETID3_ASF_No_Error_Correction:
 615                                                         // should be no data, but just in case there is, skip to the end of the field
 616                                                         $offset += $thisfile_asf_errorcorrectionobject['error_correction_data_length'];
 617                                                         break;
 618
 619                                                 case GETID3_ASF_Audio_Spread:
 620                                                         // Field Name                   Field Type   Size (bits)
 621                                                         // Span                         BYTE         8               // number of packets over which audio will be spread.
 622                                                         // Virtual Packet Length        WORD         16              // size of largest audio payload found in audio stream
 623                                                         // Virtual Chunk Length         WORD         16              // size of largest audio payload found in audio stream
 624                                                         // Silence Data Length          WORD         16              // number of bytes in Silence Data field
 625                                                         // Silence Data                 BYTESTREAM   variable        // hardcoded: 0x00 * (Silence Data Length) bytes
 626
 627                                                         $thisfile_asf_errorcorrectionobject['span']                  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 1));
 628                                                         $offset += 1;
 629                                                         $thisfile_asf_errorcorrectionobject['virtual_packet_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 630                                                         $offset += 2;
 631                                                         $thisfile_asf_errorcorrectionobject['virtual_chunk_length']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 632                                                         $offset += 2;
 633                                                         $thisfile_asf_errorcorrectionobject['silence_data_length']   = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 634                                                         $offset += 2;
 635                                                         $thisfile_asf_errorcorrectionobject['silence_data']          = substr($ASFHeaderData, $offset, $thisfile_asf_errorcorrectionobject['silence_data_length']);
 636                                                         $offset += $thisfile_asf_errorcorrectionobject['silence_data_length'];
 637                                                         break;
 638
 639                                                 default:
 640                                                         $info['warning'][] = 'error_correction_object.error_correction_type GUID {'.$this->BytestringToGUID($thisfile_asf_errorcorrectionobject['reserved']).'} does not match expected "GETID3_ASF_No_Error_Correction" GUID {'.$this->BytestringToGUID(GETID3_ASF_No_Error_Correction).'} or  "GETID3_ASF_Audio_Spread" GUID {'.$this->BytestringToGUID(GETID3_ASF_Audio_Spread).'}';
 641                                                         //return false;
 642                                                         break;
 643                                         }
 644
 645                                         break;
 646
 647                                 case GETID3_ASF_Content_Description_Object:
 648                                         // Content Description Object: (optional, one only)
 649                                         // Field Name                   Field Type   Size (bits)
 650                                         // Object ID                    GUID         128             // GUID for Content Description object - GETID3_ASF_Content_Description_Object
 651                                         // Object Size                  QWORD        64              // size of Content Description object, including 34 bytes of Content Description Object header
 652                                         // Title Length                 WORD         16              // number of bytes in Title field
 653                                         // Author Length                WORD         16              // number of bytes in Author field
 654                                         // Copyright Length             WORD         16              // number of bytes in Copyright field
 655                                         // Description Length           WORD         16              // number of bytes in Description field
 656                                         // Rating Length                WORD         16              // number of bytes in Rating field
 657                                         // Title                        WCHAR        16              // array of Unicode characters - Title
 658                                         // Author                       WCHAR        16              // array of Unicode characters - Author
 659                                         // Copyright                    WCHAR        16              // array of Unicode characters - Copyright
 660                                         // Description                  WCHAR        16              // array of Unicode characters - Description
 661                                         // Rating                       WCHAR        16              // array of Unicode characters - Rating
 662
 663                                         // shortcut
 664                                         $thisfile_asf['content_description_object'] = array();
 665                                         $thisfile_asf_contentdescriptionobject      = &$thisfile_asf['content_description_object'];
 666
 667                                         $thisfile_asf_contentdescriptionobject['offset']                = $NextObjectOffset + $offset;
 668                                         $thisfile_asf_contentdescriptionobject['objectid']              = $NextObjectGUID;
 669                                         $thisfile_asf_contentdescriptionobject['objectid_guid']         = $NextObjectGUIDtext;
 670                                         $thisfile_asf_contentdescriptionobject['objectsize']            = $NextObjectSize;
 671                                         $thisfile_asf_contentdescriptionobject['title_length']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 672                                         $offset += 2;
 673                                         $thisfile_asf_contentdescriptionobject['author_length']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 674                                         $offset += 2;
 675                                         $thisfile_asf_contentdescriptionobject['copyright_length']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 676                                         $offset += 2;
 677                                         $thisfile_asf_contentdescriptionobject['description_length']    = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 678                                         $offset += 2;
 679                                         $thisfile_asf_contentdescriptionobject['rating_length']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 680                                         $offset += 2;
 681                                         $thisfile_asf_contentdescriptionobject['title']                 = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['title_length']);
 682                                         $offset += $thisfile_asf_contentdescriptionobject['title_length'];
 683                                         $thisfile_asf_contentdescriptionobject['author']                = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['author_length']);
 684                                         $offset += $thisfile_asf_contentdescriptionobject['author_length'];
 685                                         $thisfile_asf_contentdescriptionobject['copyright']             = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['copyright_length']);
 686                                         $offset += $thisfile_asf_contentdescriptionobject['copyright_length'];
 687                                         $thisfile_asf_contentdescriptionobject['description']           = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['description_length']);
 688                                         $offset += $thisfile_asf_contentdescriptionobject['description_length'];
 689                                         $thisfile_asf_contentdescriptionobject['rating']                = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['rating_length']);
 690                                         $offset += $thisfile_asf_contentdescriptionobject['rating_length'];
 691
 692                                         $ASFcommentKeysToCopy = array('title'=>'title', 'author'=>'artist', 'copyright'=>'copyright', 'description'=>'comment', 'rating'=>'rating');
 693                                         foreach ($ASFcommentKeysToCopy as $keytocopyfrom => $keytocopyto) {
 694                                                 if (!empty($thisfile_asf_contentdescriptionobject[$keytocopyfrom])) {
 695                                                         $thisfile_asf_comments[$keytocopyto][] = $this->TrimTerm($thisfile_asf_contentdescriptionobject[$keytocopyfrom]);
 696                                                 }
 697                                         }
 698                                         break;
 699
 700                                 case GETID3_ASF_Extended_Content_Description_Object:
 701                                         // Extended Content Description Object: (optional, one only)
 702                                         // Field Name                   Field Type   Size (bits)
 703                                         // Object ID                    GUID         128             // GUID for Extended Content Description object - GETID3_ASF_Extended_Content_Description_Object
 704                                         // Object Size                  QWORD        64              // size of ExtendedContent Description object, including 26 bytes of Extended Content Description Object header
 705                                         // Content Descriptors Count    WORD         16              // number of entries in Content Descriptors list
 706                                         // Content Descriptors          array of:    variable        //
 707                                         // * Descriptor Name Length     WORD         16              // size in bytes of Descriptor Name field
 708                                         // * Descriptor Name            WCHAR        variable        // array of Unicode characters - Descriptor Name
 709                                         // * Descriptor Value Data Type WORD         16              // Lookup array:
 710                                                                                                                                                                         // 0x0000 = Unicode String (variable length)
 711                                                                                                                                                                         // 0x0001 = BYTE array     (variable length)
 712                                                                                                                                                                         // 0x0002 = BOOL           (DWORD, 32 bits)
 713                                                                                                                                                                         // 0x0003 = DWORD          (DWORD, 32 bits)
 714                                                                                                                                                                         // 0x0004 = QWORD          (QWORD, 64 bits)
 715                                                                                                                                                                         // 0x0005 = WORD           (WORD,  16 bits)
 716                                         // * Descriptor Value Length    WORD         16              // number of bytes stored in Descriptor Value field
 717                                         // * Descriptor Value           variable     variable        // value for Content Descriptor
 718
 719                                         // shortcut
 720                                         $thisfile_asf['extended_content_description_object'] = array();
 721                                         $thisfile_asf_extendedcontentdescriptionobject       = &$thisfile_asf['extended_content_description_object'];
 722
 723                                         $thisfile_asf_extendedcontentdescriptionobject['offset']                    = $NextObjectOffset + $offset;
 724                                         $thisfile_asf_extendedcontentdescriptionobject['objectid']                  = $NextObjectGUID;
 725                                         $thisfile_asf_extendedcontentdescriptionobject['objectid_guid']             = $NextObjectGUIDtext;
 726                                         $thisfile_asf_extendedcontentdescriptionobject['objectsize']                = $NextObjectSize;
 727                                         $thisfile_asf_extendedcontentdescriptionobject['content_descriptors_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 728                                         $offset += 2;
 729                                         for ($ExtendedContentDescriptorsCounter = 0; $ExtendedContentDescriptorsCounter < $thisfile_asf_extendedcontentdescriptionobject['content_descriptors_count']; $ExtendedContentDescriptorsCounter++) {
 730                                                 // shortcut
 731                                                 $thisfile_asf_extendedcontentdescriptionobject['content_descriptors'][$ExtendedContentDescriptorsCounter] = array();
 732                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current                 = &$thisfile_asf_extendedcontentdescriptionobject['content_descriptors'][$ExtendedContentDescriptorsCounter];
 733
 734                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['base_offset']  = $offset + 30;
 735                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 736                                                 $offset += 2;
 737                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name']         = substr($ASFHeaderData, $offset, $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length']);
 738                                                 $offset += $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length'];
 739                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type']   = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 740                                                 $offset += 2;
 741                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 742                                                 $offset += 2;
 743                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']        = substr($ASFHeaderData, $offset, $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length']);
 744                                                 $offset += $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length'];
 745                                                 switch ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type']) {
 746                                                         case 0x0000: // Unicode string
 747                                                                 break;
 748
 749                                                         case 0x0001: // BYTE array
 750                                                                 // do nothing
 751                                                                 break;
 752
 753                                                         case 0x0002: // BOOL
 754                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'] = (bool) getid3_lib::LittleEndian2Int($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
 755                                                                 break;
 756
 757                                                         case 0x0003: // DWORD
 758                                                         case 0x0004: // QWORD
 759                                                         case 0x0005: // WORD
 760                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'] = getid3_lib::LittleEndian2Int($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
 761                                                                 break;
 762
 763                                                         default:
 764                                                                 $info['warning'][] = 'extended_content_description.content_descriptors.'.$ExtendedContentDescriptorsCounter.'.value_type is invalid ('.$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type'].')';
 765                                                                 //return false;
 766                                                                 break;
 767                                                 }
 768                                                 switch ($this->TrimConvert(strtolower($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name']))) {
 769
 770                                                         case 'wm/albumartist':
 771                                                         case 'artist':
 772                                                                 // Note: not 'artist', that comes from 'author' tag
 773                                                                 $thisfile_asf_comments['albumartist'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 774                                                                 break;
 775
 776                                                         case 'wm/albumtitle':
 777                                                         case 'album':
 778                                                                 $thisfile_asf_comments['album']  = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 779                                                                 break;
 780
 781                                                         case 'wm/genre':
 782                                                         case 'genre':
 783                                                                 $thisfile_asf_comments['genre'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 784                                                                 break;
 785
 786                                                         case 'wm/partofset':
 787                                                                 $thisfile_asf_comments['partofset'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 788                                                                 break;
 789
 790                                                         case 'wm/tracknumber':
 791                                                         case 'tracknumber':
 792                                                                 // be careful casting to int: casting unicode strings to int gives unexpected results (stops parsing at first non-numeric character)
 793                                                                 $thisfile_asf_comments['track'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 794                                                                 foreach ($thisfile_asf_comments['track'] as $key => $value) {
 795                                                                         if (preg_match('/^[0-9\x00]+$/', $value)) {
 796                                                                                 $thisfile_asf_comments['track'][$key] = intval(str_replace("\x00", '', $value));
 797                                                                         }
 798                                                                 }
 799                                                                 break;
 800
 801                                                         case 'wm/track':
 802                                                                 if (empty($thisfile_asf_comments['track'])) {
 803                                                                         $thisfile_asf_comments['track'] = array(1 + $this->TrimConvert($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 804                                                                 }
 805                                                                 break;
 806
 807                                                         case 'wm/year':
 808                                                         case 'year':
 809                                                         case 'date':
 810                                                                 $thisfile_asf_comments['year'] = array( $this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 811                                                                 break;
 812
 813                                                         case 'wm/lyrics':
 814                                                         case 'lyrics':
 815                                                                 $thisfile_asf_comments['lyrics'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 816                                                                 break;
 817
 818                                                         case 'isvbr':
 819                                                                 if ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']) {
 820                                                                         $thisfile_audio['bitrate_mode'] = 'vbr';
 821                                                                         $thisfile_video['bitrate_mode'] = 'vbr';
 822                                                                 }
 823                                                                 break;
 824
 825                                                         case 'id3':
 826                                                                 $this->getid3->include_module('tag.id3v2');
 827
 828                                                                 $getid3_id3v2 = new getid3_id3v2($this->getid3);
 829                                                                 $getid3_id3v2->AnalyzeString($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
 830                                                                 unset($getid3_id3v2);
 831
 832                                                                 if ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length'] > 1024) {
 833                                                                         $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'] = '<value too large to display>';
 834                                                                 }
 835                                                                 break;
 836
 837                                                         case 'wm/encodingtime':
 838                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['encoding_time_unix'] = $this->FILETIMEtoUNIXtime($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
 839                                                                 $thisfile_asf_comments['encoding_time_unix'] = array($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['encoding_time_unix']);
 840                                                                 break;
 841
 842                                                         case 'wm/picture':
 843                                                                 $WMpicture = $this->ASF_WMpicture($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
 844                                                                 foreach ($WMpicture as $key => $value) {
 845                                                                         $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current[$key] = $value;
 846                                                                 }
 847                                                                 unset($WMpicture);
 848 /*
 849                                                                 $wm_picture_offset = 0;
 850                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_type_id'] = getid3_lib::LittleEndian2Int(substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset, 1));
 851                                                                 $wm_picture_offset += 1;
 852                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_type']    = self::WMpictureTypeLookup($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_type_id']);
 853                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_size']    = getid3_lib::LittleEndian2Int(substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset, 4));
 854                                                                 $wm_picture_offset += 4;
 855
 856                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime'] = '';
 857                                                                 do {
 858                                                                         $next_byte_pair = substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset, 2);
 859                                                                         $wm_picture_offset += 2;
 860                                                                         $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime'] .= $next_byte_pair;
 861                                                                 } while ($next_byte_pair !== "\x00\x00");
 862
 863                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_description'] = '';
 864                                                                 do {
 865                                                                         $next_byte_pair = substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset, 2);
 866                                                                         $wm_picture_offset += 2;
 867                                                                         $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_description'] .= $next_byte_pair;
 868                                                                 } while ($next_byte_pair !== "\x00\x00");
 869
 870                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['dataoffset'] = $wm_picture_offset;
 871                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['data'] = substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset);
 872                                                                 unset($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
 873
 874                                                                 $imageinfo = array();
 875                                                                 $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime'] = '';
 876                                                                 $imagechunkcheck = getid3_lib::GetDataImageSize($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['data'], $imageinfo);
 877                                                                 unset($imageinfo);
 878                                                                 if (!empty($imagechunkcheck)) {
 879                                                                         $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
 880                                                                 }
 881                                                                 if (!isset($thisfile_asf_comments['picture'])) {
 882                                                                         $thisfile_asf_comments['picture'] = array();
 883                                                                 }
 884                                                                 $thisfile_asf_comments['picture'][] = array('data'=>$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['data'], 'image_mime'=>$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime']);
 885 */
 886                                                                 break;
 887
 888                                                         default:
 889                                                                 switch ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type']) {
 890                                                                         case 0: // Unicode string
 891                                                                                 if (substr($this->TrimConvert($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name']), 0, 3) == 'WM/') {
 892                                                                                         $thisfile_asf_comments[str_replace('wm/', '', strtolower($this->TrimConvert($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name'])))] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
 893                                                                                 }
 894                                                                                 break;
 895
 896                                                                         case 1:
 897                                                                                 break;
 898                                                                 }
 899                                                                 break;
 900                                                 }
 901
 902                                         }
 903                                         break;
 904
 905                                 case GETID3_ASF_Stream_Bitrate_Properties_Object:
 906                                         // Stream Bitrate Properties Object: (optional, one only)
 907                                         // Field Name                   Field Type   Size (bits)
 908                                         // Object ID                    GUID         128             // GUID for Stream Bitrate Properties object - GETID3_ASF_Stream_Bitrate_Properties_Object
 909                                         // Object Size                  QWORD        64              // size of Extended Content Description object, including 26 bytes of Stream Bitrate Properties Object header
 910                                         // Bitrate Records Count        WORD         16              // number of records in Bitrate Records
 911                                         // Bitrate Records              array of:    variable        //
 912                                         // * Flags                      WORD         16              //
 913                                         // * * Stream Number            bits         7  (0x007F)     // number of this stream
 914                                         // * * Reserved                 bits         9  (0xFF80)     // hardcoded: 0
 915                                         // * Average Bitrate            DWORD        32              // in bits per second
 916
 917                                         // shortcut
 918                                         $thisfile_asf['stream_bitrate_properties_object'] = array();
 919                                         $thisfile_asf_streambitratepropertiesobject       = &$thisfile_asf['stream_bitrate_properties_object'];
 920
 921                                         $thisfile_asf_streambitratepropertiesobject['offset']                    = $NextObjectOffset + $offset;
 922                                         $thisfile_asf_streambitratepropertiesobject['objectid']                  = $NextObjectGUID;
 923                                         $thisfile_asf_streambitratepropertiesobject['objectid_guid']             = $NextObjectGUIDtext;
 924                                         $thisfile_asf_streambitratepropertiesobject['objectsize']                = $NextObjectSize;
 925                                         $thisfile_asf_streambitratepropertiesobject['bitrate_records_count']     = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 926                                         $offset += 2;
 927                                         for ($BitrateRecordsCounter = 0; $BitrateRecordsCounter < $thisfile_asf_streambitratepropertiesobject['bitrate_records_count']; $BitrateRecordsCounter++) {
 928                                                 $thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['flags_raw'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
 929                                                 $offset += 2;
 930                                                 $thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['flags']['stream_number'] = $thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['flags_raw'] & 0x007F;
 931                                                 $thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['bitrate'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
 932                                                 $offset += 4;
 933                                         }
 934                                         break;
 935
 936                                 case GETID3_ASF_Padding_Object:
 937                                         // Padding Object: (optional)
 938                                         // Field Name                   Field Type   Size (bits)
 939                                         // Object ID                    GUID         128             // GUID for Padding object - GETID3_ASF_Padding_Object
 940                                         // Object Size                  QWORD        64              // size of Padding object, including 24 bytes of ASF Padding Object header
 941                                         // Padding Data                 BYTESTREAM   variable        // ignore
 942
 943                                         // shortcut
 944                                         $thisfile_asf['padding_object'] = array();
 945                                         $thisfile_asf_paddingobject     = &$thisfile_asf['padding_object'];
 946
 947                                         $thisfile_asf_paddingobject['offset']                    = $NextObjectOffset + $offset;
 948                                         $thisfile_asf_paddingobject['objectid']                  = $NextObjectGUID;
 949                                         $thisfile_asf_paddingobject['objectid_guid']             = $NextObjectGUIDtext;
 950                                         $thisfile_asf_paddingobject['objectsize']                = $NextObjectSize;
 951                                         $thisfile_asf_paddingobject['padding_length']            = $thisfile_asf_paddingobject['objectsize'] - 16 - 8;
 952                                         $thisfile_asf_paddingobject['padding']                   = substr($ASFHeaderData, $offset, $thisfile_asf_paddingobject['padding_length']);
 953                                         $offset += ($NextObjectSize - 16 - 8);
 954                                         break;
 955
 956                                 case GETID3_ASF_Extended_Content_Encryption_Object:
 957                                 case GETID3_ASF_Content_Encryption_Object:
 958                                         // WMA DRM - just ignore
 959                                         $offset += ($NextObjectSize - 16 - 8);
 960                                         break;
 961
 962                                 default:
 963                                         // Implementations shall ignore any standard or non-standard object that they do not know how to handle.
 964                                         if ($this->GUIDname($NextObjectGUIDtext)) {
 965                                                 $info['warning'][] = 'unhandled GUID "'.$this->GUIDname($NextObjectGUIDtext).'" {'.$NextObjectGUIDtext.'} in ASF header at offset '.($offset - 16 - 8);
 966                                         } else {
 967                                                 $info['warning'][] = 'unknown GUID {'.$NextObjectGUIDtext.'} in ASF header at offset '.($offset - 16 - 8);
 968                                         }
 969                                         $offset += ($NextObjectSize - 16 - 8);
 970                                         break;
 971                         }
 972                 }
 973                 if (isset($thisfile_asf_streambitrateproperties['bitrate_records_count'])) {
 974                         $ASFbitrateAudio = 0;
 975                         $ASFbitrateVideo = 0;
 976                         for ($BitrateRecordsCounter = 0; $BitrateRecordsCounter < $thisfile_asf_streambitrateproperties['bitrate_records_count']; $BitrateRecordsCounter++) {
 977                                 if (isset($thisfile_asf_codeclistobject['codec_entries'][$BitrateRecordsCounter])) {
 978                                         switch ($thisfile_asf_codeclistobject['codec_entries'][$BitrateRecordsCounter]['type_raw']) {
 979                                                 case 1:
 980                                                         $ASFbitrateVideo += $thisfile_asf_streambitrateproperties['bitrate_records'][$BitrateRecordsCounter]['bitrate'];
 981                                                         break;
 982
 983                                                 case 2:
 984                                                         $ASFbitrateAudio += $thisfile_asf_streambitrateproperties['bitrate_records'][$BitrateRecordsCounter]['bitrate'];
 985                                                         break;
 986
 987                                                 default:
 988                                                         // do nothing
 989                                                         break;
 990                                         }
 991                                 }
 992                         }
 993                         if ($ASFbitrateAudio > 0) {
 994                                 $thisfile_audio['bitrate'] = $ASFbitrateAudio;
 995                         }
 996                         if ($ASFbitrateVideo > 0) {
 997                                 $thisfile_video['bitrate'] = $ASFbitrateVideo;
 998                         }
 999                 }
1000                 if (isset($thisfile_asf['stream_properties_object']) && is_array($thisfile_asf['stream_properties_object'])) {
1001
1002                         $thisfile_audio['bitrate'] = 0;
1003                         $thisfile_video['bitrate'] = 0;
1004
1005                         foreach ($thisfile_asf['stream_properties_object'] as $streamnumber => $streamdata) {
1006
1007                                 switch ($streamdata['stream_type']) {
1008                                         case GETID3_ASF_Audio_Media:
1009                                                 // Field Name                   Field Type   Size (bits)
1010                                                 // Codec ID / Format Tag        WORD         16              // unique ID of audio codec - defined as wFormatTag field of WAVEFORMATEX structure
1011                                                 // Number of Channels           WORD         16              // number of channels of audio - defined as nChannels field of WAVEFORMATEX structure
1012                                                 // Samples Per Second           DWORD        32              // in Hertz - defined as nSamplesPerSec field of WAVEFORMATEX structure
1013                                                 // Average number of Bytes/sec  DWORD        32              // bytes/sec of audio stream  - defined as nAvgBytesPerSec field of WAVEFORMATEX structure
1014                                                 // Block Alignment              WORD         16              // block size in bytes of audio codec - defined as nBlockAlign field of WAVEFORMATEX structure
1015                                                 // Bits per sample              WORD         16              // bits per sample of mono data. set to zero for variable bitrate codecs. defined as wBitsPerSample field of WAVEFORMATEX structure
1016                                                 // Codec Specific Data Size     WORD         16              // size in bytes of Codec Specific Data buffer - defined as cbSize field of WAVEFORMATEX structure
1017                                                 // Codec Specific Data          BYTESTREAM   variable        // array of codec-specific data bytes
1018
1019                                                 // shortcut
1020                                                 $thisfile_asf['audio_media'][$streamnumber] = array();
1021                                                 $thisfile_asf_audiomedia_currentstream      = &$thisfile_asf['audio_media'][$streamnumber];
1022
1023                                                 $audiomediaoffset = 0;
1024
1025                                                 $thisfile_asf_audiomedia_currentstream = getid3_riff::parseWAVEFORMATex(substr($streamdata['type_specific_data'], $audiomediaoffset, 16));
1026                                                 $audiomediaoffset += 16;
1027
1028                                                 $thisfile_audio['lossless'] = false;
1029                                                 switch ($thisfile_asf_audiomedia_currentstream['raw']['wFormatTag']) {
1030                                                         case 0x0001: // PCM
1031                                                         case 0x0163: // WMA9 Lossless
1032                                                                 $thisfile_audio['lossless'] = true;
1033                                                                 break;
1034                                                 }
1035
1036                                                 if (!empty($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'])) {
1037                                                         foreach ($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'] as $dummy => $dataarray) {
1038                                                                 if (isset($dataarray['flags']['stream_number']) && ($dataarray['flags']['stream_number'] == $streamnumber)) {
1039                                                                         $thisfile_asf_audiomedia_currentstream['bitrate'] = $dataarray['bitrate'];
1040                                                                         $thisfile_audio['bitrate'] += $dataarray['bitrate'];
1041                                                                         break;
1042                                                                 }
1043                                                         }
1044                                                 } else {
1045                                                         if (!empty($thisfile_asf_audiomedia_currentstream['bytes_sec'])) {
1046                                                                 $thisfile_audio['bitrate'] += $thisfile_asf_audiomedia_currentstream['bytes_sec'] * 8;
1047                                                         } elseif (!empty($thisfile_asf_audiomedia_currentstream['bitrate'])) {
1048                                                                 $thisfile_audio['bitrate'] += $thisfile_asf_audiomedia_currentstream['bitrate'];
1049                                                         }
1050                                                 }
1051                                                 $thisfile_audio['streams'][$streamnumber]                = $thisfile_asf_audiomedia_currentstream;
1052                                                 $thisfile_audio['streams'][$streamnumber]['wformattag']  = $thisfile_asf_audiomedia_currentstream['raw']['wFormatTag'];
1053                                                 $thisfile_audio['streams'][$streamnumber]['lossless']    = $thisfile_audio['lossless'];
1054                                                 $thisfile_audio['streams'][$streamnumber]['bitrate']     = $thisfile_audio['bitrate'];
1055                                                 $thisfile_audio['streams'][$streamnumber]['dataformat']  = 'wma';
1056                                                 unset($thisfile_audio['streams'][$streamnumber]['raw']);
1057
1058                                                 $thisfile_asf_audiomedia_currentstream['codec_data_size'] = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $audiomediaoffset, 2));
1059                                                 $audiomediaoffset += 2;
1060                                                 $thisfile_asf_audiomedia_currentstream['codec_data']      = substr($streamdata['type_specific_data'], $audiomediaoffset, $thisfile_asf_audiomedia_currentstream['codec_data_size']);
1061                                                 $audiomediaoffset += $thisfile_asf_audiomedia_currentstream['codec_data_size'];
1062
1063                                                 break;
1064
1065                                         case GETID3_ASF_Video_Media:
1066                                                 // Field Name                   Field Type   Size (bits)
1067                                                 // Encoded Image Width          DWORD        32              // width of image in pixels
1068                                                 // Encoded Image Height         DWORD        32              // height of image in pixels
1069                                                 // Reserved Flags               BYTE         8               // hardcoded: 0x02
1070                                                 // Format Data Size             WORD         16              // size of Format Data field in bytes
1071                                                 // Format Data                  array of:    variable        //
1072                                                 // * Format Data Size           DWORD        32              // number of bytes in Format Data field, in bytes - defined as biSize field of BITMAPINFOHEADER structure
1073                                                 // * Image Width                LONG         32              // width of encoded image in pixels - defined as biWidth field of BITMAPINFOHEADER structure
1074                                                 // * Image Height               LONG         32              // height of encoded image in pixels - defined as biHeight field of BITMAPINFOHEADER structure
1075                                                 // * Reserved                   WORD         16              // hardcoded: 0x0001 - defined as biPlanes field of BITMAPINFOHEADER structure
1076                                                 // * Bits Per Pixel Count       WORD         16              // bits per pixel - defined as biBitCount field of BITMAPINFOHEADER structure
1077                                                 // * Compression ID             FOURCC       32              // fourcc of video codec - defined as biCompression field of BITMAPINFOHEADER structure
1078                                                 // * Image Size                 DWORD        32              // image size in bytes - defined as biSizeImage field of BITMAPINFOHEADER structure
1079                                                 // * Horizontal Pixels / Meter  DWORD        32              // horizontal resolution of target device in pixels per meter - defined as biXPelsPerMeter field of BITMAPINFOHEADER structure
1080                                                 // * Vertical Pixels / Meter    DWORD        32              // vertical resolution of target device in pixels per meter - defined as biYPelsPerMeter field of BITMAPINFOHEADER structure
1081                                                 // * Colors Used Count          DWORD        32              // number of color indexes in the color table that are actually used - defined as biClrUsed field of BITMAPINFOHEADER structure
1082                                                 // * Important Colors Count     DWORD        32              // number of color index required for displaying bitmap. if zero, all colors are required. defined as biClrImportant field of BITMAPINFOHEADER structure
1083                                                 // * Codec Specific Data        BYTESTREAM   variable        // array of codec-specific data bytes
1084
1085                                                 // shortcut
1086                                                 $thisfile_asf['video_media'][$streamnumber] = array();
1087                                                 $thisfile_asf_videomedia_currentstream      = &$thisfile_asf['video_media'][$streamnumber];
1088
1089                                                 $videomediaoffset = 0;
1090                                                 $thisfile_asf_videomedia_currentstream['image_width']                     = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1091                                                 $videomediaoffset += 4;
1092                                                 $thisfile_asf_videomedia_currentstream['image_height']                    = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1093                                                 $videomediaoffset += 4;
1094                                                 $thisfile_asf_videomedia_currentstream['flags']                           = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 1));
1095                                                 $videomediaoffset += 1;
1096                                                 $thisfile_asf_videomedia_currentstream['format_data_size']                = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 2));
1097                                                 $videomediaoffset += 2;
1098                                                 $thisfile_asf_videomedia_currentstream['format_data']['format_data_size'] = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1099                                                 $videomediaoffset += 4;
1100                                                 $thisfile_asf_videomedia_currentstream['format_data']['image_width']      = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1101                                                 $videomediaoffset += 4;
1102                                                 $thisfile_asf_videomedia_currentstream['format_data']['image_height']     = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1103                                                 $videomediaoffset += 4;
1104                                                 $thisfile_asf_videomedia_currentstream['format_data']['reserved']         = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 2));
1105                                                 $videomediaoffset += 2;
1106                                                 $thisfile_asf_videomedia_currentstream['format_data']['bits_per_pixel']   = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 2));
1107                                                 $videomediaoffset += 2;
1108                                                 $thisfile_asf_videomedia_currentstream['format_data']['codec_fourcc']     = substr($streamdata['type_specific_data'], $videomediaoffset, 4);
1109                                                 $videomediaoffset += 4;
1110                                                 $thisfile_asf_videomedia_currentstream['format_data']['image_size']       = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1111                                                 $videomediaoffset += 4;
1112                                                 $thisfile_asf_videomedia_currentstream['format_data']['horizontal_pels']  = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1113                                                 $videomediaoffset += 4;
1114                                                 $thisfile_asf_videomedia_currentstream['format_data']['vertical_pels']    = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1115                                                 $videomediaoffset += 4;
1116                                                 $thisfile_asf_videomedia_currentstream['format_data']['colors_used']      = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1117                                                 $videomediaoffset += 4;
1118                                                 $thisfile_asf_videomedia_currentstream['format_data']['colors_important'] = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
1119                                                 $videomediaoffset += 4;
1120                                                 $thisfile_asf_videomedia_currentstream['format_data']['codec_data']       = substr($streamdata['type_specific_data'], $videomediaoffset);
1121
1122                                                 if (!empty($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'])) {
1123                                                         foreach ($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'] as $dummy => $dataarray) {
1124                                                                 if (isset($dataarray['flags']['stream_number']) && ($dataarray['flags']['stream_number'] == $streamnumber)) {
1125                                                                         $thisfile_asf_videomedia_currentstream['bitrate'] = $dataarray['bitrate'];
1126                                                                         $thisfile_video['streams'][$streamnumber]['bitrate'] = $dataarray['bitrate'];
1127                                                                         $thisfile_video['bitrate'] += $dataarray['bitrate'];
1128                                                                         break;
1129                                                                 }
1130                                                         }
1131                                                 }
1132
1133                                                 $thisfile_asf_videomedia_currentstream['format_data']['codec'] = getid3_riff::fourccLookup($thisfile_asf_videomedia_currentstream['format_data']['codec_fourcc']);
1134
1135                                                 $thisfile_video['streams'][$streamnumber]['fourcc']          = $thisfile_asf_videomedia_currentstream['format_data']['codec_fourcc'];
1136                                                 $thisfile_video['streams'][$streamnumber]['codec']           = $thisfile_asf_videomedia_currentstream['format_data']['codec'];
1137                                                 $thisfile_video['streams'][$streamnumber]['resolution_x']    = $thisfile_asf_videomedia_currentstream['image_width'];
1138                                                 $thisfile_video['streams'][$streamnumber]['resolution_y']    = $thisfile_asf_videomedia_currentstream['image_height'];
1139                                                 $thisfile_video['streams'][$streamnumber]['bits_per_sample'] = $thisfile_asf_videomedia_currentstream['format_data']['bits_per_pixel'];
1140                                                 break;
1141
1142                                         default:
1143                                                 break;
1144                                 }
1145                         }
1146                 }
1147
1148                 while ($this->ftell() < $info['avdataend']) {
1149                         $NextObjectDataHeader = $this->fread(24);
1150                         $offset = 0;
1151                         $NextObjectGUID = substr($NextObjectDataHeader, 0, 16);
1152                         $offset += 16;
1153                         $NextObjectGUIDtext = $this->BytestringToGUID($NextObjectGUID);
1154                         $NextObjectSize = getid3_lib::LittleEndian2Int(substr($NextObjectDataHeader, $offset, 8));
1155                         $offset += 8;
1156
1157                         switch ($NextObjectGUID) {
1158                                 case GETID3_ASF_Data_Object:
1159                                         // Data Object: (mandatory, one only)
1160                                         // Field Name                       Field Type   Size (bits)
1161                                         // Object ID                        GUID         128             // GUID for Data object - GETID3_ASF_Data_Object
1162                                         // Object Size                      QWORD        64              // size of Data object, including 50 bytes of Data Object header. may be 0 if FilePropertiesObject.BroadcastFlag == 1
1163                                         // File ID                          GUID         128             // unique identifier. identical to File ID field in Header Object
1164                                         // Total Data Packets               QWORD        64              // number of Data Packet entries in Data Object. invalid if FilePropertiesObject.BroadcastFlag == 1
1165                                         // Reserved                         WORD         16              // hardcoded: 0x0101
1166
1167                                         // shortcut
1168                                         $thisfile_asf['data_object'] = array();
1169                                         $thisfile_asf_dataobject     = &$thisfile_asf['data_object'];
1170
1171                                         $DataObjectData = $NextObjectDataHeader.$this->fread(50 - 24);
1172                                         $offset = 24;
1173
1174                                         $thisfile_asf_dataobject['objectid']           = $NextObjectGUID;
1175                                         $thisfile_asf_dataobject['objectid_guid']      = $NextObjectGUIDtext;
1176                                         $thisfile_asf_dataobject['objectsize']         = $NextObjectSize;
1177
1178                                         $thisfile_asf_dataobject['fileid']             = substr($DataObjectData, $offset, 16);
1179                                         $offset += 16;
1180                                         $thisfile_asf_dataobject['fileid_guid']        = $this->BytestringToGUID($thisfile_asf_dataobject['fileid']);
1181                                         $thisfile_asf_dataobject['total_data_packets'] = getid3_lib::LittleEndian2Int(substr($DataObjectData, $offset, 8));
1182                                         $offset += 8;
1183                                         $thisfile_asf_dataobject['reserved']           = getid3_lib::LittleEndian2Int(substr($DataObjectData, $offset, 2));
1184                                         $offset += 2;
1185                                         if ($thisfile_asf_dataobject['reserved'] != 0x0101) {
1186                                                 $info['warning'][] = 'data_object.reserved ('.getid3_lib::PrintHexBytes($thisfile_asf_dataobject['reserved']).') does not match expected value of "0x0101"';
1187                                                 //return false;
1188                                                 break;
1189                                         }
1190
1191                                         // Data Packets                     array of:    variable        //
1192                                         // * Error Correction Flags         BYTE         8               //
1193                                         // * * Error Correction Data Length bits         4               // if Error Correction Length Type == 00, size of Error Correction Data in bytes, else hardcoded: 0000
1194                                         // * * Opaque Data Present          bits         1               //
1195                                         // * * Error Correction Length Type bits         2               // number of bits for size of the error correction data. hardcoded: 00
1196                                         // * * Error Correction Present     bits         1               // If set, use Opaque Data Packet structure, else use Payload structure
1197                                         // * Error Correction Data
1198
1199                                         $info['avdataoffset'] = $this->ftell();
1200                                         $this->fseek(($thisfile_asf_dataobject['objectsize'] - 50), SEEK_CUR); // skip actual audio/video data
1201                                         $info['avdataend'] = $this->ftell();
1202                                         break;
1203
1204                                 case GETID3_ASF_Simple_Index_Object:
1205                                         // Simple Index Object: (optional, recommended, one per video stream)
1206                                         // Field Name                       Field Type   Size (bits)
1207                                         // Object ID                        GUID         128             // GUID for Simple Index object - GETID3_ASF_Data_Object
1208                                         // Object Size                      QWORD        64              // size of Simple Index object, including 56 bytes of Simple Index Object header
1209                                         // File ID                          GUID         128             // unique identifier. may be zero or identical to File ID field in Data Object and Header Object
1210                                         // Index Entry Time Interval        QWORD        64              // interval between index entries in 100-nanosecond units
1211                                         // Maximum Packet Count             DWORD        32              // maximum packet count for all index entries
1212                                         // Index Entries Count              DWORD        32              // number of Index Entries structures
1213                                         // Index Entries                    array of:    variable        //
1214                                         // * Packet Number                  DWORD        32              // number of the Data Packet associated with this index entry
1215                                         // * Packet Count                   WORD         16              // number of Data Packets to sent at this index entry
1216
1217                                         // shortcut
1218                                         $thisfile_asf['simple_index_object'] = array();
1219                                         $thisfile_asf_simpleindexobject      = &$thisfile_asf['simple_index_object'];
1220
1221                                         $SimpleIndexObjectData = $NextObjectDataHeader.$this->fread(56 - 24);
1222                                         $offset = 24;
1223
1224                                         $thisfile_asf_simpleindexobject['objectid']                  = $NextObjectGUID;
1225                                         $thisfile_asf_simpleindexobject['objectid_guid']             = $NextObjectGUIDtext;
1226                                         $thisfile_asf_simpleindexobject['objectsize']                = $NextObjectSize;
1227
1228                                         $thisfile_asf_simpleindexobject['fileid']                    =                  substr($SimpleIndexObjectData, $offset, 16);
1229                                         $offset += 16;
1230                                         $thisfile_asf_simpleindexobject['fileid_guid']               = $this->BytestringToGUID($thisfile_asf_simpleindexobject['fileid']);
1231                                         $thisfile_asf_simpleindexobject['index_entry_time_interval'] = getid3_lib::LittleEndian2Int(substr($SimpleIndexObjectData, $offset, 8));
1232                                         $offset += 8;
1233                                         $thisfile_asf_simpleindexobject['maximum_packet_count']      = getid3_lib::LittleEndian2Int(substr($SimpleIndexObjectData, $offset, 4));
1234                                         $offset += 4;
1235                                         $thisfile_asf_simpleindexobject['index_entries_count']       = getid3_lib::LittleEndian2Int(substr($SimpleIndexObjectData, $offset, 4));
1236                                         $offset += 4;
1237
1238                                         $IndexEntriesData = $SimpleIndexObjectData.$this->fread(6 * $thisfile_asf_simpleindexobject['index_entries_count']);
1239                                         for ($IndexEntriesCounter = 0; $IndexEntriesCounter < $thisfile_asf_simpleindexobject['index_entries_count']; $IndexEntriesCounter++) {
1240                                                 $thisfile_asf_simpleindexobject['index_entries'][$IndexEntriesCounter]['packet_number'] = getid3_lib::LittleEndian2Int(substr($IndexEntriesData, $offset, 4));
1241                                                 $offset += 4;
1242                                                 $thisfile_asf_simpleindexobject['index_entries'][$IndexEntriesCounter]['packet_count']  = getid3_lib::LittleEndian2Int(substr($IndexEntriesData, $offset, 4));
1243                                                 $offset += 2;
1244                                         }
1245
1246                                         break;
1247
1248                                 case GETID3_ASF_Index_Object:
1249                                         // 6.2 ASF top-level Index Object (optional but recommended when appropriate, 0 or 1)
1250                                         // Field Name                       Field Type   Size (bits)
1251                                         // Object ID                        GUID         128             // GUID for the Index Object - GETID3_ASF_Index_Object
1252                                         // Object Size                      QWORD        64              // Specifies the size, in bytes, of the Index Object, including at least 34 bytes of Index Object header
1253                                         // Index Entry Time Interval        DWORD        32              // Specifies the time interval between each index entry in ms.
1254                                         // Index Specifiers Count           WORD         16              // Specifies the number of Index Specifiers structures in this Index Object.
1255                                         // Index Blocks Count               DWORD        32              // Specifies the number of Index Blocks structures in this Index Object.
1256
1257                                         // Index Entry Time Interval        DWORD        32              // Specifies the time interval between index entries in milliseconds.  This value cannot be 0.
1258                                         // Index Specifiers Count           WORD         16              // Specifies the number of entries in the Index Specifiers list.  Valid values are 1 and greater.
1259                                         // Index Specifiers                 array of:    varies          //
1260                                         // * Stream Number                  WORD         16              // Specifies the stream number that the Index Specifiers refer to. Valid values are between 1 and 127.
1261                                         // * Index Type                     WORD         16              // Specifies Index Type values as follows:
1262                                                                                                                                                                         //   1 = Nearest Past Data Packet - indexes point to the data packet whose presentation time is closest to the index entry time.
1263                                                                                                                                                                         //   2 = Nearest Past Media Object - indexes point to the closest data packet containing an entire object or first fragment of an object.
1264                                                                                                                                                                         //   3 = Nearest Past Cleanpoint. - indexes point to the closest data packet containing an entire object (or first fragment of an object) that has the Cleanpoint Flag set.
1265                                                                                                                                                                         //   Nearest Past Cleanpoint is the most common type of index.
1266                                         // Index Entry Count                DWORD        32              // Specifies the number of Index Entries in the block.
1267                                         // * Block Positions                QWORD        varies          // Specifies a list of byte offsets of the beginnings of the blocks relative to the beginning of the first Data Packet (i.e., the beginning of the Data Object + 50 bytes). The number of entries in this list is specified by the value of the Index Specifiers Count field. The order of those byte offsets is tied to the order in which Index Specifiers are listed.
1268                                         // * Index Entries                  array of:    varies          //
1269                                         // * * Offsets                      DWORD        varies          // An offset value of 0xffffffff indicates an invalid offset value
1270
1271                                         // shortcut
1272                                         $thisfile_asf['asf_index_object'] = array();
1273                                         $thisfile_asf_asfindexobject      = &$thisfile_asf['asf_index_object'];
1274
1275                                         $ASFIndexObjectData = $NextObjectDataHeader.$this->fread(34 - 24);
1276                                         $offset = 24;
1277
1278                                         $thisfile_asf_asfindexobject['objectid']                  = $NextObjectGUID;
1279                                         $thisfile_asf_asfindexobject['objectid_guid']             = $NextObjectGUIDtext;
1280                                         $thisfile_asf_asfindexobject['objectsize']                = $NextObjectSize;
1281
1282                                         $thisfile_asf_asfindexobject['entry_time_interval']       = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 4));
1283                                         $offset += 4;
1284                                         $thisfile_asf_asfindexobject['index_specifiers_count']    = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 2));
1285                                         $offset += 2;
1286                                         $thisfile_asf_asfindexobject['index_blocks_count']        = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 4));
1287                                         $offset += 4;
1288
1289                                         $ASFIndexObjectData .= $this->fread(4 * $thisfile_asf_asfindexobject['index_specifiers_count']);
1290                                         for ($IndexSpecifiersCounter = 0; $IndexSpecifiersCounter < $thisfile_asf_asfindexobject['index_specifiers_count']; $IndexSpecifiersCounter++) {
1291                                                 $IndexSpecifierStreamNumber = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 2));
1292                                                 $offset += 2;
1293                                                 $thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]['stream_number']   = $IndexSpecifierStreamNumber;
1294                                                 $thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]['index_type']      = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 2));
1295                                                 $offset += 2;
1296                                                 $thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]['index_type_text'] = $this->ASFIndexObjectIndexTypeLookup($thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]['index_type']);
1297                                         }
1298
1299                                         $ASFIndexObjectData .= $this->fread(4);
1300                                         $thisfile_asf_asfindexobject['index_entry_count'] = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 4));
1301                                         $offset += 4;
1302
1303                                         $ASFIndexObjectData .= $this->fread(8 * $thisfile_asf_asfindexobject['index_specifiers_count']);
1304                                         for ($IndexSpecifiersCounter = 0; $IndexSpecifiersCounter < $thisfile_asf_asfindexobject['index_specifiers_count']; $IndexSpecifiersCounter++) {
1305                                                 $thisfile_asf_asfindexobject['block_positions'][$IndexSpecifiersCounter] = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 8));
1306                                                 $offset += 8;
1307                                         }
1308
1309                                         $ASFIndexObjectData .= $this->fread(4 * $thisfile_asf_asfindexobject['index_specifiers_count'] * $thisfile_asf_asfindexobject['index_entry_count']);
1310                                         for ($IndexEntryCounter = 0; $IndexEntryCounter < $thisfile_asf_asfindexobject['index_entry_count']; $IndexEntryCounter++) {
1311                                                 for ($IndexSpecifiersCounter = 0; $IndexSpecifiersCounter < $thisfile_asf_asfindexobject['index_specifiers_count']; $IndexSpecifiersCounter++) {
1312                                                         $thisfile_asf_asfindexobject['offsets'][$IndexSpecifiersCounter][$IndexEntryCounter] = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 4));
1313                                                         $offset += 4;
1314                                                 }
1315                                         }
1316                                         break;
1317
1318
1319                                 default:
1320                                         // Implementations shall ignore any standard or non-standard object that they do not know how to handle.
1321                                         if ($this->GUIDname($NextObjectGUIDtext)) {
1322                                                 $info['warning'][] = 'unhandled GUID "'.$this->GUIDname($NextObjectGUIDtext).'" {'.$NextObjectGUIDtext.'} in ASF body at offset '.($offset - 16 - 8);
1323                                         } else {
1324                                                 $info['warning'][] = 'unknown GUID {'.$NextObjectGUIDtext.'} in ASF body at offset '.($this->ftell() - 16 - 8);
1325                                         }
1326                                         $this->fseek(($NextObjectSize - 16 - 8), SEEK_CUR);
1327                                         break;
1328                         }
1329                 }
1330
1331                 if (isset($thisfile_asf_codeclistobject['codec_entries']) && is_array($thisfile_asf_codeclistobject['codec_entries'])) {
1332                         foreach ($thisfile_asf_codeclistobject['codec_entries'] as $streamnumber => $streamdata) {
1333                                 switch ($streamdata['information']) {
1334                                         case 'WMV1':
1335                                         case 'WMV2':
1336                                         case 'WMV3':
1337                                         case 'MSS1':
1338                                         case 'MSS2':
1339                                         case 'WMVA':
1340                                         case 'WVC1':
1341                                         case 'WMVP':
1342                                         case 'WVP2':
1343                                                 $thisfile_video['dataformat'] = 'wmv';
1344                                                 $info['mime_type'] = 'video/x-ms-wmv';
1345                                                 break;
1346
1347                                         case 'MP42':
1348                                         case 'MP43':
1349                                         case 'MP4S':
1350                                         case 'mp4s':
1351                                                 $thisfile_video['dataformat'] = 'asf';
1352                                                 $info['mime_type'] = 'video/x-ms-asf';
1353                                                 break;
1354
1355                                         default:
1356                                                 switch ($streamdata['type_raw']) {
1357                                                         case 1:
1358                                                                 if (strstr($this->TrimConvert($streamdata['name']), 'Windows Media')) {
1359                                                                         $thisfile_video['dataformat'] = 'wmv';
1360                                                                         if ($info['mime_type'] == 'video/x-ms-asf') {
1361                                                                                 $info['mime_type'] = 'video/x-ms-wmv';
1362                                                                         }
1363                                                                 }
1364                                                                 break;
1365
1366                                                         case 2:
1367                                                                 if (strstr($this->TrimConvert($streamdata['name']), 'Windows Media')) {
1368                                                                         $thisfile_audio['dataformat'] = 'wma';
1369                                                                         if ($info['mime_type'] == 'video/x-ms-asf') {
1370                                                                                 $info['mime_type'] = 'audio/x-ms-wma';
1371                                                                         }
1372                                                                 }
1373                                                                 break;
1374
1375                                                 }
1376                                                 break;
1377                                 }
1378                         }
1379                 }
1380
1381                 switch (isset($thisfile_audio['codec']) ? $thisfile_audio['codec'] : '') {
1382                         case 'MPEG Layer-3':
1383                                 $thisfile_audio['dataformat'] = 'mp3';
1384                                 break;
1385
1386                         default:
1387                                 break;
1388                 }
1389
1390                 if (isset($thisfile_asf_codeclistobject['codec_entries'])) {
1391                         foreach ($thisfile_asf_codeclistobject['codec_entries'] as $streamnumber => $streamdata) {
1392                                 switch ($streamdata['type_raw']) {
1393
1394                                         case 1: // video
1395                                                 $thisfile_video['encoder'] = $this->TrimConvert($thisfile_asf_codeclistobject['codec_entries'][$streamnumber]['name']);
1396                                                 break;
1397
1398                                         case 2: // audio
1399                                                 $thisfile_audio['encoder'] = $this->TrimConvert($thisfile_asf_codeclistobject['codec_entries'][$streamnumber]['name']);
1400
1401                                                 // AH 2003-10-01
1402                                                 $thisfile_audio['encoder_options'] = $this->TrimConvert($thisfile_asf_codeclistobject['codec_entries'][0]['description']);
1403
1404                                                 $thisfile_audio['codec']   = $thisfile_audio['encoder'];
1405                                                 break;
1406
1407                                         default:
1408                                                 $info['warning'][] = 'Unknown streamtype: [codec_list_object][codec_entries]['.$streamnumber.'][type_raw] == '.$streamdata['type_raw'];
1409                                                 break;
1410
1411                                 }
1412                         }
1413                 }
1414
1415                 if (isset($info['audio'])) {
1416                         $thisfile_audio['lossless']           = (isset($thisfile_audio['lossless'])           ? $thisfile_audio['lossless']           : false);
1417                         $thisfile_audio['dataformat']         = (!empty($thisfile_audio['dataformat'])        ? $thisfile_audio['dataformat']         : 'asf');
1418                 }
1419                 if (!empty($thisfile_video['dataformat'])) {
1420                         $thisfile_video['lossless']           = (isset($thisfile_audio['lossless'])           ? $thisfile_audio['lossless']           : false);
1421                         $thisfile_video['pixel_aspect_ratio'] = (isset($thisfile_audio['pixel_aspect_ratio']) ? $thisfile_audio['pixel_aspect_ratio'] : (float) 1);
1422                         $thisfile_video['dataformat']         = (!empty($thisfile_video['dataformat'])        ? $thisfile_video['dataformat']         : 'asf');
1423                 }
1424                 if (!empty($thisfile_video['streams'])) {
1425                         $thisfile_video['resolution_x'] = 0;
1426                         $thisfile_video['resolution_y'] = 0;
1427                         foreach ($thisfile_video['streams'] as $key => $valuearray) {
1428                                 if (($valuearray['resolution_x'] > $thisfile_video['resolution_x']) || ($valuearray['resolution_y'] > $thisfile_video['resolution_y'])) {
1429                                         $thisfile_video['resolution_x'] = $valuearray['resolution_x'];
1430                                         $thisfile_video['resolution_y'] = $valuearray['resolution_y'];
1431                                 }
1432                         }
1433                 }
1434                 $info['bitrate'] = (isset($thisfile_audio['bitrate']) ? $thisfile_audio['bitrate'] : 0) + (isset($thisfile_video['bitrate']) ? $thisfile_video['bitrate'] : 0);
1435
1436                 if ((!isset($info['playtime_seconds']) || ($info['playtime_seconds'] <= 0)) && ($info['bitrate'] > 0)) {
1437                         $info['playtime_seconds'] = ($info['filesize'] - $info['avdataoffset']) / ($info['bitrate'] / 8);
1438                 }
1439
1440                 return true;
1441         }
1442
1443         public static function codecListObjectTypeLookup($CodecListType) {
1444                 static $lookup = array(
1445                         0x0001 => 'Video Codec',
1446                         0x0002 => 'Audio Codec',
1447                         0xFFFF => 'Unknown Codec'
1448                 );
1449
1450                 return (isset($lookup[$CodecListType]) ? $lookup[$CodecListType] : 'Invalid Codec Type');
1451         }
1452
1453         public static function KnownGUIDs() {
1454                 static $GUIDarray = array(
1455                         'GETID3_ASF_Extended_Stream_Properties_Object'   => '14E6A5CB-C672-4332-8399-A96952065B5A',
1456                         'GETID3_ASF_Padding_Object'                      => '1806D474-CADF-4509-A4BA-9AABCB96AAE8',
1457                         'GETID3_ASF_Payload_Ext_Syst_Pixel_Aspect_Ratio' => '1B1EE554-F9EA-4BC8-821A-376B74E4C4B8',
1458                         'GETID3_ASF_Script_Command_Object'               => '1EFB1A30-0B62-11D0-A39B-00A0C90348F6',
1459                         'GETID3_ASF_No_Error_Correction'                 => '20FB5700-5B55-11CF-A8FD-00805F5C442B',
1460                         'GETID3_ASF_Content_Branding_Object'             => '2211B3FA-BD23-11D2-B4B7-00A0C955FC6E',
1461                         'GETID3_ASF_Content_Encryption_Object'           => '2211B3FB-BD23-11D2-B4B7-00A0C955FC6E',
1462                         'GETID3_ASF_Digital_Signature_Object'            => '2211B3FC-BD23-11D2-B4B7-00A0C955FC6E',
1463                         'GETID3_ASF_Extended_Content_Encryption_Object'  => '298AE614-2622-4C17-B935-DAE07EE9289C',
1464                         'GETID3_ASF_Simple_Index_Object'                 => '33000890-E5B1-11CF-89F4-00A0C90349CB',
1465                         'GETID3_ASF_Degradable_JPEG_Media'               => '35907DE0-E415-11CF-A917-00805F5C442B',
1466                         'GETID3_ASF_Payload_Extension_System_Timecode'   => '399595EC-8667-4E2D-8FDB-98814CE76C1E',
1467                         'GETID3_ASF_Binary_Media'                        => '3AFB65E2-47EF-40F2-AC2C-70A90D71D343',
1468                         'GETID3_ASF_Timecode_Index_Object'               => '3CB73FD0-0C4A-4803-953D-EDF7B6228F0C',
1469                         'GETID3_ASF_Metadata_Library_Object'             => '44231C94-9498-49D1-A141-1D134E457054',
1470                         'GETID3_ASF_Reserved_3'                          => '4B1ACBE3-100B-11D0-A39B-00A0C90348F6',
1471                         'GETID3_ASF_Reserved_4'                          => '4CFEDB20-75F6-11CF-9C0F-00A0C90349CB',
1472                         'GETID3_ASF_Command_Media'                       => '59DACFC0-59E6-11D0-A3AC-00A0C90348F6',
1473                         'GETID3_ASF_Header_Extension_Object'             => '5FBF03B5-A92E-11CF-8EE3-00C00C205365',
1474                         'GETID3_ASF_Media_Object_Index_Parameters_Obj'   => '6B203BAD-3F11-4E84-ACA8-D7613DE2CFA7',
1475                         'GETID3_ASF_Header_Object'                       => '75B22630-668E-11CF-A6D9-00AA0062CE6C',
1476                         'GETID3_ASF_Content_Description_Object'          => '75B22633-668E-11CF-A6D9-00AA0062CE6C',
1477                         'GETID3_ASF_Error_Correction_Object'             => '75B22635-668E-11CF-A6D9-00AA0062CE6C',
1478                         'GETID3_ASF_Data_Object'                         => '75B22636-668E-11CF-A6D9-00AA0062CE6C',
1479                         'GETID3_ASF_Web_Stream_Media_Subtype'            => '776257D4-C627-41CB-8F81-7AC7FF1C40CC',
1480                         'GETID3_ASF_Stream_Bitrate_Properties_Object'    => '7BF875CE-468D-11D1-8D82-006097C9A2B2',
1481                         'GETID3_ASF_Language_List_Object'                => '7C4346A9-EFE0-4BFC-B229-393EDE415C85',
1482                         'GETID3_ASF_Codec_List_Object'                   => '86D15240-311D-11D0-A3A4-00A0C90348F6',
1483                         'GETID3_ASF_Reserved_2'                          => '86D15241-311D-11D0-A3A4-00A0C90348F6',
1484                         'GETID3_ASF_File_Properties_Object'              => '8CABDCA1-A947-11CF-8EE4-00C00C205365',
1485                         'GETID3_ASF_File_Transfer_Media'                 => '91BD222C-F21C-497A-8B6D-5AA86BFC0185',
1486                         'GETID3_ASF_Old_RTP_Extension_Data'              => '96800C63-4C94-11D1-837B-0080C7A37F95',
1487                         'GETID3_ASF_Advanced_Mutual_Exclusion_Object'    => 'A08649CF-4775-4670-8A16-6E35357566CD',
1488                         'GETID3_ASF_Bandwidth_Sharing_Object'            => 'A69609E6-517B-11D2-B6AF-00C04FD908E9',
1489                         'GETID3_ASF_Reserved_1'                          => 'ABD3D211-A9BA-11cf-8EE6-00C00C205365',
1490                         'GETID3_ASF_Bandwidth_Sharing_Exclusive'         => 'AF6060AA-5197-11D2-B6AF-00C04FD908E9',
1491                         'GETID3_ASF_Bandwidth_Sharing_Partial'           => 'AF6060AB-5197-11D2-B6AF-00C04FD908E9',
1492                         'GETID3_ASF_JFIF_Media'                          => 'B61BE100-5B4E-11CF-A8FD-00805F5C442B',
1493                         'GETID3_ASF_Stream_Properties_Object'            => 'B7DC0791-A9B7-11CF-8EE6-00C00C205365',
1494                         'GETID3_ASF_Video_Media'                         => 'BC19EFC0-5B4D-11CF-A8FD-00805F5C442B',
1495                         'GETID3_ASF_Audio_Spread'                        => 'BFC3CD50-618F-11CF-8BB2-00AA00B4E220',
1496                         'GETID3_ASF_Metadata_Object'                     => 'C5F8CBEA-5BAF-4877-8467-AA8C44FA4CCA',
1497                         'GETID3_ASF_Payload_Ext_Syst_Sample_Duration'    => 'C6BD9450-867F-4907-83A3-C77921B733AD',
1498                         'GETID3_ASF_Group_Mutual_Exclusion_Object'       => 'D1465A40-5A79-4338-B71B-E36B8FD6C249',
1499                         'GETID3_ASF_Extended_Content_Description_Object' => 'D2D0A440-E307-11D2-97F0-00A0C95EA850',
1500                         'GETID3_ASF_Stream_Prioritization_Object'        => 'D4FED15B-88D3-454F-81F0-ED5C45999E24',
1501                         'GETID3_ASF_Payload_Ext_System_Content_Type'     => 'D590DC20-07BC-436C-9CF7-F3BBFBF1A4DC',
1502                         'GETID3_ASF_Old_File_Properties_Object'          => 'D6E229D0-35DA-11D1-9034-00A0C90349BE',
1503                         'GETID3_ASF_Old_ASF_Header_Object'               => 'D6E229D1-35DA-11D1-9034-00A0C90349BE',
1504                         'GETID3_ASF_Old_ASF_Data_Object'                 => 'D6E229D2-35DA-11D1-9034-00A0C90349BE',
1505                         'GETID3_ASF_Index_Object'                        => 'D6E229D3-35DA-11D1-9034-00A0C90349BE',
1506                         'GETID3_ASF_Old_Stream_Properties_Object'        => 'D6E229D4-35DA-11D1-9034-00A0C90349BE',
1507                         'GETID3_ASF_Old_Content_Description_Object'      => 'D6E229D5-35DA-11D1-9034-00A0C90349BE',
1508                         'GETID3_ASF_Old_Script_Command_Object'           => 'D6E229D6-35DA-11D1-9034-00A0C90349BE',
1509                         'GETID3_ASF_Old_Marker_Object'                   => 'D6E229D7-35DA-11D1-9034-00A0C90349BE',
1510                         'GETID3_ASF_Old_Component_Download_Object'       => 'D6E229D8-35DA-11D1-9034-00A0C90349BE',
1511                         'GETID3_ASF_Old_Stream_Group_Object'             => 'D6E229D9-35DA-11D1-9034-00A0C90349BE',
1512                         'GETID3_ASF_Old_Scalable_Object'                 => 'D6E229DA-35DA-11D1-9034-00A0C90349BE',
1513                         'GETID3_ASF_Old_Prioritization_Object'           => 'D6E229DB-35DA-11D1-9034-00A0C90349BE',
1514                         'GETID3_ASF_Bitrate_Mutual_Exclusion_Object'     => 'D6E229DC-35DA-11D1-9034-00A0C90349BE',
1515                         'GETID3_ASF_Old_Inter_Media_Dependency_Object'   => 'D6E229DD-35DA-11D1-9034-00A0C90349BE',
1516                         'GETID3_ASF_Old_Rating_Object'                   => 'D6E229DE-35DA-11D1-9034-00A0C90349BE',
1517                         'GETID3_ASF_Index_Parameters_Object'             => 'D6E229DF-35DA-11D1-9034-00A0C90349BE',
1518                         'GETID3_ASF_Old_Color_Table_Object'              => 'D6E229E0-35DA-11D1-9034-00A0C90349BE',
1519                         'GETID3_ASF_Old_Language_List_Object'            => 'D6E229E1-35DA-11D1-9034-00A0C90349BE',
1520                         'GETID3_ASF_Old_Audio_Media'                     => 'D6E229E2-35DA-11D1-9034-00A0C90349BE',
1521                         'GETID3_ASF_Old_Video_Media'                     => 'D6E229E3-35DA-11D1-9034-00A0C90349BE',
1522                         'GETID3_ASF_Old_Image_Media'                     => 'D6E229E4-35DA-11D1-9034-00A0C90349BE',
1523                         'GETID3_ASF_Old_Timecode_Media'                  => 'D6E229E5-35DA-11D1-9034-00A0C90349BE',
1524                         'GETID3_ASF_Old_Text_Media'                      => 'D6E229E6-35DA-11D1-9034-00A0C90349BE',
1525                         'GETID3_ASF_Old_MIDI_Media'                      => 'D6E229E7-35DA-11D1-9034-00A0C90349BE',
1526                         'GETID3_ASF_Old_Command_Media'                   => 'D6E229E8-35DA-11D1-9034-00A0C90349BE',
1527                         'GETID3_ASF_Old_No_Error_Concealment'            => 'D6E229EA-35DA-11D1-9034-00A0C90349BE',
1528                         'GETID3_ASF_Old_Scrambled_Audio'                 => 'D6E229EB-35DA-11D1-9034-00A0C90349BE',
1529                         'GETID3_ASF_Old_No_Color_Table'                  => 'D6E229EC-35DA-11D1-9034-00A0C90349BE',
1530                         'GETID3_ASF_Old_SMPTE_Time'                      => 'D6E229ED-35DA-11D1-9034-00A0C90349BE',
1531                         'GETID3_ASF_Old_ASCII_Text'                      => 'D6E229EE-35DA-11D1-9034-00A0C90349BE',
1532                         'GETID3_ASF_Old_Unicode_Text'                    => 'D6E229EF-35DA-11D1-9034-00A0C90349BE',
1533                         'GETID3_ASF_Old_HTML_Text'                       => 'D6E229F0-35DA-11D1-9034-00A0C90349BE',
1534                         'GETID3_ASF_Old_URL_Command'                     => 'D6E229F1-35DA-11D1-9034-00A0C90349BE',
1535                         'GETID3_ASF_Old_Filename_Command'                => 'D6E229F2-35DA-11D1-9034-00A0C90349BE',
1536                         'GETID3_ASF_Old_ACM_Codec'                       => 'D6E229F3-35DA-11D1-9034-00A0C90349BE',
1537                         'GETID3_ASF_Old_VCM_Codec'                       => 'D6E229F4-35DA-11D1-9034-00A0C90349BE',
1538                         'GETID3_ASF_Old_QuickTime_Codec'                 => 'D6E229F5-35DA-11D1-9034-00A0C90349BE',
1539                         'GETID3_ASF_Old_DirectShow_Transform_Filter'     => 'D6E229F6-35DA-11D1-9034-00A0C90349BE',
1540                         'GETID3_ASF_Old_DirectShow_Rendering_Filter'     => 'D6E229F7-35DA-11D1-9034-00A0C90349BE',
1541                         'GETID3_ASF_Old_No_Enhancement'                  => 'D6E229F8-35DA-11D1-9034-00A0C90349BE',
1542                         'GETID3_ASF_Old_Unknown_Enhancement_Type'        => 'D6E229F9-35DA-11D1-9034-00A0C90349BE',
1543                         'GETID3_ASF_Old_Temporal_Enhancement'            => 'D6E229FA-35DA-11D1-9034-00A0C90349BE',
1544                         'GETID3_ASF_Old_Spatial_Enhancement'             => 'D6E229FB-35DA-11D1-9034-00A0C90349BE',
1545                         'GETID3_ASF_Old_Quality_Enhancement'             => 'D6E229FC-35DA-11D1-9034-00A0C90349BE',
1546                         'GETID3_ASF_Old_Number_of_Channels_Enhancement'  => 'D6E229FD-35DA-11D1-9034-00A0C90349BE',
1547                         'GETID3_ASF_Old_Frequency_Response_Enhancement'  => 'D6E229FE-35DA-11D1-9034-00A0C90349BE',
1548                         'GETID3_ASF_Old_Media_Object'                    => 'D6E229FF-35DA-11D1-9034-00A0C90349BE',
1549                         'GETID3_ASF_Mutex_Language'                      => 'D6E22A00-35DA-11D1-9034-00A0C90349BE',
1550                         'GETID3_ASF_Mutex_Bitrate'                       => 'D6E22A01-35DA-11D1-9034-00A0C90349BE',
1551                         'GETID3_ASF_Mutex_Unknown'                       => 'D6E22A02-35DA-11D1-9034-00A0C90349BE',
1552                         'GETID3_ASF_Old_ASF_Placeholder_Object'          => 'D6E22A0E-35DA-11D1-9034-00A0C90349BE',
1553                         'GETID3_ASF_Old_Data_Unit_Extension_Object'      => 'D6E22A0F-35DA-11D1-9034-00A0C90349BE',
1554                         'GETID3_ASF_Web_Stream_Format'                   => 'DA1E6B13-8359-4050-B398-388E965BF00C',
1555                         'GETID3_ASF_Payload_Ext_System_File_Name'        => 'E165EC0E-19ED-45D7-B4A7-25CBD1E28E9B',
1556                         'GETID3_ASF_Marker_Object'                       => 'F487CD01-A951-11CF-8EE6-00C00C205365',
1557                         'GETID3_ASF_Timecode_Index_Parameters_Object'    => 'F55E496D-9797-4B5D-8C8B-604DFE9BFB24',
1558                         'GETID3_ASF_Audio_Media'                         => 'F8699E40-5B4D-11CF-A8FD-00805F5C442B',
1559                         'GETID3_ASF_Media_Object_Index_Object'           => 'FEB103F8-12AD-4C64-840F-2A1D2F7AD48C',
1560                         'GETID3_ASF_Alt_Extended_Content_Encryption_Obj' => 'FF889EF1-ADEE-40DA-9E71-98704BB928CE',
1561                         'GETID3_ASF_Index_Placeholder_Object'            => 'D9AADE20-7C17-4F9C-BC28-8555DD98E2A2', // http://cpan.uwinnipeg.ca/htdocs/Audio-WMA/Audio/WMA.pm.html
1562                         'GETID3_ASF_Compatibility_Object'                => '26F18B5D-4584-47EC-9F5F-0E651F0452C9', // http://cpan.uwinnipeg.ca/htdocs/Audio-WMA/Audio/WMA.pm.html
1563                 );
1564                 return $GUIDarray;
1565         }
1566
1567         public static function GUIDname($GUIDstring) {
1568                 static $GUIDarray = array();
1569                 if (empty($GUIDarray)) {
1570                         $GUIDarray = self::KnownGUIDs();
1571                 }
1572                 return array_search($GUIDstring, $GUIDarray);
1573         }
1574
1575         public static function ASFIndexObjectIndexTypeLookup($id) {
1576                 static $ASFIndexObjectIndexTypeLookup = array();
1577                 if (empty($ASFIndexObjectIndexTypeLookup)) {
1578                         $ASFIndexObjectIndexTypeLookup[1] = 'Nearest Past Data Packet';
1579                         $ASFIndexObjectIndexTypeLookup[2] = 'Nearest Past Media Object';
1580                         $ASFIndexObjectIndexTypeLookup[3] = 'Nearest Past Cleanpoint';
1581                 }
1582                 return (isset($ASFIndexObjectIndexTypeLookup[$id]) ? $ASFIndexObjectIndexTypeLookup[$id] : 'invalid');
1583         }
1584
1585         public static function GUIDtoBytestring($GUIDstring) {
1586                 // Microsoft defines these 16-byte (128-bit) GUIDs in the strangest way:
1587                 // first 4 bytes are in little-endian order
1588                 // next 2 bytes are appended in little-endian order
1589                 // next 2 bytes are appended in little-endian order
1590                 // next 2 bytes are appended in big-endian order
1591                 // next 6 bytes are appended in big-endian order
1592
1593                 // AaBbCcDd-EeFf-GgHh-IiJj-KkLlMmNnOoPp is stored as this 16-byte string:
1594                 // $Dd $Cc $Bb $Aa $Ff $Ee $Hh $Gg $Ii $Jj $Kk $Ll $Mm $Nn $Oo $Pp
1595
1596                 $hexbytecharstring  = chr(hexdec(substr($GUIDstring,  6, 2)));
1597                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring,  4, 2)));
1598                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring,  2, 2)));
1599                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring,  0, 2)));
1600
1601                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 11, 2)));
1602                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring,  9, 2)));
1603
1604                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 16, 2)));
1605                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 14, 2)));
1606
1607                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 19, 2)));
1608                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 21, 2)));
1609
1610                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 24, 2)));
1611                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 26, 2)));
1612                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 28, 2)));
1613                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 30, 2)));
1614                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 32, 2)));
1615                 $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 34, 2)));
1616
1617                 return $hexbytecharstring;
1618         }
1619
1620         public static function BytestringToGUID($Bytestring) {
1621                 $GUIDstring  = str_pad(dechex(ord($Bytestring{3})),  2, '0', STR_PAD_LEFT);
1622                 $GUIDstring .= str_pad(dechex(ord($Bytestring{2})),  2, '0', STR_PAD_LEFT);
1623                 $GUIDstring .= str_pad(dechex(ord($Bytestring{1})),  2, '0', STR_PAD_LEFT);
1624                 $GUIDstring .= str_pad(dechex(ord($Bytestring{0})),  2, '0', STR_PAD_LEFT);
1625                 $GUIDstring .= '-';
1626                 $GUIDstring .= str_pad(dechex(ord($Bytestring{5})),  2, '0', STR_PAD_LEFT);
1627                 $GUIDstring .= str_pad(dechex(ord($Bytestring{4})),  2, '0', STR_PAD_LEFT);
1628                 $GUIDstring .= '-';
1629                 $GUIDstring .= str_pad(dechex(ord($Bytestring{7})),  2, '0', STR_PAD_LEFT);
1630                 $GUIDstring .= str_pad(dechex(ord($Bytestring{6})),  2, '0', STR_PAD_LEFT);
1631                 $GUIDstring .= '-';
1632                 $GUIDstring .= str_pad(dechex(ord($Bytestring{8})),  2, '0', STR_PAD_LEFT);
1633                 $GUIDstring .= str_pad(dechex(ord($Bytestring{9})),  2, '0', STR_PAD_LEFT);
1634                 $GUIDstring .= '-';
1635                 $GUIDstring .= str_pad(dechex(ord($Bytestring{10})), 2, '0', STR_PAD_LEFT);
1636                 $GUIDstring .= str_pad(dechex(ord($Bytestring{11})), 2, '0', STR_PAD_LEFT);
1637                 $GUIDstring .= str_pad(dechex(ord($Bytestring{12})), 2, '0', STR_PAD_LEFT);
1638                 $GUIDstring .= str_pad(dechex(ord($Bytestring{13})), 2, '0', STR_PAD_LEFT);
1639                 $GUIDstring .= str_pad(dechex(ord($Bytestring{14})), 2, '0', STR_PAD_LEFT);
1640                 $GUIDstring .= str_pad(dechex(ord($Bytestring{15})), 2, '0', STR_PAD_LEFT);
1641
1642                 return strtoupper($GUIDstring);
1643         }
1644
1645         public static function FILETIMEtoUNIXtime($FILETIME, $round=true) {
1646                 // FILETIME is a 64-bit unsigned integer representing
1647                 // the number of 100-nanosecond intervals since January 1, 1601
1648                 // UNIX timestamp is number of seconds since January 1, 1970
1649                 // 116444736000000000 = 10000000 * 60 * 60 * 24 * 365 * 369 + 89 leap days
1650                 if ($round) {
1651                         return intval(round(($FILETIME - 116444736000000000) / 10000000));
1652                 }
1653                 return ($FILETIME - 116444736000000000) / 10000000;
1654         }
1655
1656         public static function WMpictureTypeLookup($WMpictureType) {
1657                 static $lookup = null;
1658                 if ($lookup === null) {
1659                         $lookup = array(
1660                                 0x03 => 'Front Cover',
1661                                 0x04 => 'Back Cover',
1662                                 0x00 => 'User Defined',
1663                                 0x05 => 'Leaflet Page',
1664                                 0x06 => 'Media Label',
1665                                 0x07 => 'Lead Artist',
1666                                 0x08 => 'Artist',
1667                                 0x09 => 'Conductor',
1668                                 0x0A => 'Band',
1669                                 0x0B => 'Composer',
1670                                 0x0C => 'Lyricist',
1671                                 0x0D => 'Recording Location',
1672                                 0x0E => 'During Recording',
1673                                 0x0F => 'During Performance',
1674                                 0x10 => 'Video Screen Capture',
1675                                 0x12 => 'Illustration',
1676                                 0x13 => 'Band Logotype',
1677                                 0x14 => 'Publisher Logotype'
1678                         );
1679                         $lookup = array_map(function($str) {
1680                                 return getid3_lib::iconv_fallback('UTF-8', 'UTF-16LE', $str);
1681                         }, $lookup);
1682                 }
1683
1684                 return (isset($lookup[$WMpictureType]) ? $lookup[$WMpictureType] : '');
1685         }
1686
1687         public function HeaderExtensionObjectDataParse(&$asf_header_extension_object_data, &$unhandled_sections) {
1688                 // http://msdn.microsoft.com/en-us/library/bb643323.aspx
1689
1690                 $offset = 0;
1691                 $objectOffset = 0;
1692                 $HeaderExtensionObjectParsed = array();
1693                 while ($objectOffset < strlen($asf_header_extension_object_data)) {
1694                         $offset = $objectOffset;
1695                         $thisObject = array();
1696
1697                         $thisObject['guid']                              =                              substr($asf_header_extension_object_data, $offset, 16);
1698                         $offset += 16;
1699                         $thisObject['guid_text'] = $this->BytestringToGUID($thisObject['guid']);
1700                         $thisObject['guid_name'] = $this->GUIDname($thisObject['guid_text']);
1701
1702                         $thisObject['size']                              = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  8));
1703                         $offset += 8;
1704                         if ($thisObject['size'] <= 0) {
1705                                 break;
1706                         }
1707
1708                         switch ($thisObject['guid']) {
1709                                 case GETID3_ASF_Extended_Stream_Properties_Object:
1710                                         $thisObject['start_time']                        = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  8));
1711                                         $offset += 8;
1712                                         $thisObject['start_time_unix']                   = $this->FILETIMEtoUNIXtime($thisObject['start_time']);
1713
1714                                         $thisObject['end_time']                          = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  8));
1715                                         $offset += 8;
1716                                         $thisObject['end_time_unix']                     = $this->FILETIMEtoUNIXtime($thisObject['end_time']);
1717
1718                                         $thisObject['data_bitrate']                      = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1719                                         $offset += 4;
1720
1721                                         $thisObject['buffer_size']                       = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1722                                         $offset += 4;
1723
1724                                         $thisObject['initial_buffer_fullness']           = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1725                                         $offset += 4;
1726
1727                                         $thisObject['alternate_data_bitrate']            = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1728                                         $offset += 4;
1729
1730                                         $thisObject['alternate_buffer_size']             = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1731                                         $offset += 4;
1732
1733                                         $thisObject['alternate_initial_buffer_fullness'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1734                                         $offset += 4;
1735
1736                                         $thisObject['maximum_object_size']               = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1737                                         $offset += 4;
1738
1739                                         $thisObject['flags_raw']                         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1740                                         $offset += 4;
1741                                         $thisObject['flags']['reliable']                = (bool) $thisObject['flags_raw'] & 0x00000001;
1742                                         $thisObject['flags']['seekable']                = (bool) $thisObject['flags_raw'] & 0x00000002;
1743                                         $thisObject['flags']['no_cleanpoints']          = (bool) $thisObject['flags_raw'] & 0x00000004;
1744                                         $thisObject['flags']['resend_live_cleanpoints'] = (bool) $thisObject['flags_raw'] & 0x00000008;
1745
1746                                         $thisObject['stream_number']                     = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1747                                         $offset += 2;
1748
1749                                         $thisObject['stream_language_id_index']          = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1750                                         $offset += 2;
1751
1752                                         $thisObject['average_time_per_frame']            = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1753                                         $offset += 4;
1754
1755                                         $thisObject['stream_name_count']                 = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1756                                         $offset += 2;
1757
1758                                         $thisObject['payload_extension_system_count']    = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1759                                         $offset += 2;
1760
1761                                         for ($i = 0; $i < $thisObject['stream_name_count']; $i++) {
1762                                                 $streamName = array();
1763
1764                                                 $streamName['language_id_index']             = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1765                                                 $offset += 2;
1766
1767                                                 $streamName['stream_name_length']            = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1768                                                 $offset += 2;
1769
1770                                                 $streamName['stream_name']                   = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  $streamName['stream_name_length']));
1771                                                 $offset += $streamName['stream_name_length'];
1772
1773                                                 $thisObject['stream_names'][$i] = $streamName;
1774                                         }
1775
1776                                         for ($i = 0; $i < $thisObject['payload_extension_system_count']; $i++) {
1777                                                 $payloadExtensionSystem = array();
1778
1779                                                 $payloadExtensionSystem['extension_system_id']   =                              substr($asf_header_extension_object_data, $offset, 16);
1780                                                 $offset += 16;
1781                                                 $payloadExtensionSystem['extension_system_id_text'] = $this->BytestringToGUID($payloadExtensionSystem['extension_system_id']);
1782
1783                                                 $payloadExtensionSystem['extension_system_size'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1784                                                 $offset += 2;
1785                                                 if ($payloadExtensionSystem['extension_system_size'] <= 0) {
1786                                                         break 2;
1787                                                 }
1788
1789                                                 $payloadExtensionSystem['extension_system_info_length'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1790                                                 $offset += 4;
1791
1792                                                 $payloadExtensionSystem['extension_system_info_length'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  $payloadExtensionSystem['extension_system_info_length']));
1793                                                 $offset += $payloadExtensionSystem['extension_system_info_length'];
1794
1795                                                 $thisObject['payload_extension_systems'][$i] = $payloadExtensionSystem;
1796                                         }
1797
1798                                         break;
1799
1800                                 case GETID3_ASF_Padding_Object:
1801                                         // padding, skip it
1802                                         break;
1803
1804                                 case GETID3_ASF_Metadata_Object:
1805                                         $thisObject['description_record_counts'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1806                                         $offset += 2;
1807
1808                                         for ($i = 0; $i < $thisObject['description_record_counts']; $i++) {
1809                                                 $descriptionRecord = array();
1810
1811                                                 $descriptionRecord['reserved_1']         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2)); // must be zero
1812                                                 $offset += 2;
1813
1814                                                 $descriptionRecord['stream_number']      = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1815                                                 $offset += 2;
1816
1817                                                 $descriptionRecord['name_length']        = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1818                                                 $offset += 2;
1819
1820                                                 $descriptionRecord['data_type']          = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1821                                                 $offset += 2;
1822                                                 $descriptionRecord['data_type_text'] = self::metadataLibraryObjectDataTypeLookup($descriptionRecord['data_type']);
1823
1824                                                 $descriptionRecord['data_length']        = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1825                                                 $offset += 4;
1826
1827                                                 $descriptionRecord['name']               =                              substr($asf_header_extension_object_data, $offset,  $descriptionRecord['name_length']);
1828                                                 $offset += $descriptionRecord['name_length'];
1829
1830                                                 $descriptionRecord['data']               =                              substr($asf_header_extension_object_data, $offset,  $descriptionRecord['data_length']);
1831                                                 $offset += $descriptionRecord['data_length'];
1832                                                 switch ($descriptionRecord['data_type']) {
1833                                                         case 0x0000: // Unicode string
1834                                                                 break;
1835
1836                                                         case 0x0001: // BYTE array
1837                                                                 // do nothing
1838                                                                 break;
1839
1840                                                         case 0x0002: // BOOL
1841                                                                 $descriptionRecord['data'] = (bool) getid3_lib::LittleEndian2Int($descriptionRecord['data']);
1842                                                                 break;
1843
1844                                                         case 0x0003: // DWORD
1845                                                         case 0x0004: // QWORD
1846                                                         case 0x0005: // WORD
1847                                                                 $descriptionRecord['data'] = getid3_lib::LittleEndian2Int($descriptionRecord['data']);
1848                                                                 break;
1849
1850                                                         case 0x0006: // GUID
1851                                                                 $descriptionRecord['data_text'] = $this->BytestringToGUID($descriptionRecord['data']);
1852                                                                 break;
1853                                                 }
1854
1855                                                 $thisObject['description_record'][$i] = $descriptionRecord;
1856                                         }
1857                                         break;
1858
1859                                 case GETID3_ASF_Language_List_Object:
1860                                         $thisObject['language_id_record_counts'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1861                                         $offset += 2;
1862
1863                                         for ($i = 0; $i < $thisObject['language_id_record_counts']; $i++) {
1864                                                 $languageIDrecord = array();
1865
1866                                                 $languageIDrecord['language_id_length']         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  1));
1867                                                 $offset += 1;
1868
1869                                                 $languageIDrecord['language_id']                =                              substr($asf_header_extension_object_data, $offset,  $languageIDrecord['language_id_length']);
1870                                                 $offset += $languageIDrecord['language_id_length'];
1871
1872                                                 $thisObject['language_id_record'][$i] = $languageIDrecord;
1873                                         }
1874                                         break;
1875
1876                                 case GETID3_ASF_Metadata_Library_Object:
1877                                         $thisObject['description_records_count'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1878                                         $offset += 2;
1879
1880                                         for ($i = 0; $i < $thisObject['description_records_count']; $i++) {
1881                                                 $descriptionRecord = array();
1882
1883                                                 $descriptionRecord['language_list_index'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1884                                                 $offset += 2;
1885
1886                                                 $descriptionRecord['stream_number']       = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1887                                                 $offset += 2;
1888
1889                                                 $descriptionRecord['name_length']         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1890                                                 $offset += 2;
1891
1892                                                 $descriptionRecord['data_type']           = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
1893                                                 $offset += 2;
1894                                                 $descriptionRecord['data_type_text'] = self::metadataLibraryObjectDataTypeLookup($descriptionRecord['data_type']);
1895
1896                                                 $descriptionRecord['data_length']         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
1897                                                 $offset += 4;
1898
1899                                                 $descriptionRecord['name']                =                              substr($asf_header_extension_object_data, $offset,  $descriptionRecord['name_length']);
1900                                                 $offset += $descriptionRecord['name_length'];
1901
1902                                                 $descriptionRecord['data']                =                              substr($asf_header_extension_object_data, $offset,  $descriptionRecord['data_length']);
1903                                                 $offset += $descriptionRecord['data_length'];
1904
1905                                                 if (preg_match('#^WM/Picture$#', str_replace("\x00", '', trim($descriptionRecord['name'])))) {
1906                                                         $WMpicture = $this->ASF_WMpicture($descriptionRecord['data']);
1907                                                         foreach ($WMpicture as $key => $value) {
1908                                                                 $descriptionRecord['data'] = $WMpicture;
1909                                                         }
1910                                                         unset($WMpicture);
1911                                                 }
1912
1913                                                 $thisObject['description_record'][$i] = $descriptionRecord;
1914                                         }
1915                                         break;
1916
1917                                 default:
1918                                         $unhandled_sections++;
1919                                         if ($this->GUIDname($thisObject['guid_text'])) {
1920                                                 $this->getid3->info['warning'][] = 'unhandled Header Extension Object GUID "'.$this->GUIDname($thisObject['guid_text']).'" {'.$thisObject['guid_text'].'} at offset '.($offset - 16 - 8);
1921                                         } else {
1922                                                 $this->getid3->info['warning'][] = 'unknown Header Extension Object GUID {'.$thisObject['guid_text'].'} in at offset '.($offset - 16 - 8);
1923                                         }
1924                                         break;
1925                         }
1926                         $HeaderExtensionObjectParsed[] = $thisObject;
1927
1928                         $objectOffset += $thisObject['size'];
1929                 }
1930                 return $HeaderExtensionObjectParsed;
1931         }
1932
1933
1934         public static function metadataLibraryObjectDataTypeLookup($id) {
1935                 static $lookup = array(
1936                         0x0000 => 'Unicode string', // The data consists of a sequence of Unicode characters
1937                         0x0001 => 'BYTE array',     // The type of the data is implementation-specific
1938                         0x0002 => 'BOOL',           // The data is 2 bytes long and should be interpreted as a 16-bit unsigned integer. Only 0x0000 or 0x0001 are permitted values
1939                         0x0003 => 'DWORD',          // The data is 4 bytes long and should be interpreted as a 32-bit unsigned integer
1940                         0x0004 => 'QWORD',          // The data is 8 bytes long and should be interpreted as a 64-bit unsigned integer
1941                         0x0005 => 'WORD',           // The data is 2 bytes long and should be interpreted as a 16-bit unsigned integer
1942                         0x0006 => 'GUID',           // The data is 16 bytes long and should be interpreted as a 128-bit GUID
1943                 );
1944                 return (isset($lookup[$id]) ? $lookup[$id] : 'invalid');
1945         }
1946
1947         public function ASF_WMpicture(&$data) {
1948                 //typedef struct _WMPicture{
1949                 //  LPWSTR  pwszMIMEType;
1950                 //  BYTE  bPictureType;
1951                 //  LPWSTR  pwszDescription;
1952                 //  DWORD  dwDataLen;
1953                 //  BYTE*  pbData;
1954                 //} WM_PICTURE;
1955
1956                 $WMpicture = array();
1957
1958                 $offset = 0;
1959                 $WMpicture['image_type_id'] = getid3_lib::LittleEndian2Int(substr($data, $offset, 1));
1960                 $offset += 1;
1961                 $WMpicture['image_type']    = self::WMpictureTypeLookup($WMpicture['image_type_id']);
1962                 $WMpicture['image_size']    = getid3_lib::LittleEndian2Int(substr($data, $offset, 4));
1963                 $offset += 4;
1964
1965                 $WMpicture['image_mime'] = '';
1966                 do {
1967                         $next_byte_pair = substr($data, $offset, 2);
1968                         $offset += 2;
1969                         $WMpicture['image_mime'] .= $next_byte_pair;
1970                 } while ($next_byte_pair !== "\x00\x00");
1971
1972                 $WMpicture['image_description'] = '';
1973                 do {
1974                         $next_byte_pair = substr($data, $offset, 2);
1975                         $offset += 2;
1976                         $WMpicture['image_description'] .= $next_byte_pair;
1977                 } while ($next_byte_pair !== "\x00\x00");
1978
1979                 $WMpicture['dataoffset'] = $offset;
1980                 $WMpicture['data'] = substr($data, $offset);
1981
1982                 $imageinfo = array();
1983                 $WMpicture['image_mime'] = '';
1984                 $imagechunkcheck = getid3_lib::GetDataImageSize($WMpicture['data'], $imageinfo);
1985                 unset($imageinfo);
1986                 if (!empty($imagechunkcheck)) {
1987                         $WMpicture['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
1988                 }
1989                 if (!isset($this->getid3->info['asf']['comments']['picture'])) {
1990                         $this->getid3->info['asf']['comments']['picture'] = array();
1991                 }
1992                 $this->getid3->info['asf']['comments']['picture'][] = array('data'=>$WMpicture['data'], 'image_mime'=>$WMpicture['image_mime']);
1993
1994                 return $WMpicture;
1995         }
1996
1997
1998         // Remove terminator 00 00 and convert UTF-16LE to Latin-1
1999         public static function TrimConvert($string) {
2000                 return trim(getid3_lib::iconv_fallback('UTF-16LE', 'ISO-8859-1', self::TrimTerm($string)), ' ');
2001         }
2002
2003
2004         // Remove terminator 00 00
2005         public static function TrimTerm($string) {
2006                 // remove terminator, only if present (it should be, but...)
2007                 if (substr($string, -2) === "\x00\x00") {
2008                         $string = substr($string, 0, -2);
2009                 }
2010                 return $string;
2011         }
2012
2013 }