Metadata Library Object lets authors store stream-based, * language-attributed, multiply defined, and large metadata attributes in a * file. * * This object supports the same types of metadata as the * {@link ASF_Object_Metadata Metadata Object}, as well as attributes * with language IDs, attributes that are defined more than once, large * attributes, and attributes with the GUID data type. * * @package php-reader * @subpackage ASF * @author Sven Vollbehr * @copyright Copyright (c) 2008 The PHP Reader Project Workgroup * @license http://code.google.com/p/php-reader/wiki/License New BSD License * @version $Rev: 108 $ */ final class ASF_Object_MetadataLibrary extends ASF_Object { /** @var Array */ private $_descriptionRecords = array(); /** * Constructs the class with given parameters and reads object related data * from the ASF file. * * @param Reader $reader The reader object. * @param Array $options The options array. */ public function __construct($reader, &$options = array()) { parent::__construct($reader, $options); $descriptionRecordsCount = $this->_reader->readUInt16LE(); for ($i = 0; $i < $descriptionRecordsCount; $i++) { $descriptionRecord = array ("languageIndex" => $this->_reader->readUInt16LE(), "streamNumber" => $this->_reader->readUInt16LE()); $nameLength = $this->_reader->readUInt16LE(); $dataType = $this->_reader->readUInt16LE(); $dataLength = $this->_reader->readUInt32LE(); $descriptionRecord["name"] = iconv ("utf-16le", $this->getOption("encoding"), $this->_reader->readString16LE($nameLength)); switch ($dataType) { case 0: // Unicode string $descriptionRecord["data"] = iconv ("utf-16le", $this->getOption("encoding"), $this->_reader->readString16LE($dataLength)); break; case 1: // BYTE array $descriptionRecord["data"] = $this->_reader->read($dataLength); break; case 2: // BOOL $descriptionRecord["data"] = $this->_reader->readUInt16LE() == 1; break; case 3: // DWORD $descriptionRecord["data"] = $this->_reader->readUInt32LE(); break; case 4: // QWORD $descriptionRecord["data"] = $this->_reader->readInt64LE(); break; case 5: // WORD $descriptionRecord["data"] = $this->_reader->readUInt16LE(); break; case 6: // GUID $descriptionRecord["data"] = $this->_reader->readGUID(); break; } $this->_descriptionRecords[] = $descriptionRecord; } } /** * Returns an array of description records. Each record consists of the * following keys. * * o languageIndex -- Specifies the index into the Language List * Object that identifies the language of this attribute. If there is * no Language List Object present, this field is zero. * * o streamNumber -- Specifies whether the entry applies to a specific * digital media stream or whether it applies to the whole file. A value * of 0 in this field indicates that it applies to the whole file; * otherwise, the entry applies only to the indicated stream number. Valid * values are between 1 and 127. * * o name -- Specifies the name that identifies the attribute being * described. * * o data -- Specifies the actual metadata being stored. * * @return Array */ public function getDescriptionRecords() { return $this->_descriptionRecords; } }