Metadata Object permits authors to store stream-based metadata in
* a file. This object supports the same types of metadata information as the
* Extended Content Description Object except that it also allows a
* stream number to be specified.
*
* @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: 102 $
*/
final class ASF_Object_Metadata extends ASF_Object
{
/** @var Array */
private $_descriptions = 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++) {
$this->_reader->skip(2);
$record = array("streamNumber" => $this->_reader->readUInt16LE());
$nameLength = $this->_reader->readUInt16LE();
$dataType = $this->_reader->readUInt16LE();
$dataLength = $this->_reader->readUInt32LE();
$record["name"] = iconv
("utf-16le", $this->getOption("encoding"),
$this->_reader->readString16LE($nameLength));
switch ($dataType) {
case 0:
$record["data"] = iconv
("utf-16le", $this->getOption("encoding"),
$this->_reader->readString16LE($dataLength));
break;
case 1:
$record["data"] = $this->_reader->readString16LE($dataLength);
break;
case 2:
$record["data"] = $this->_reader->readUInt16LE() ? true : false;
break;
case 3:
$record["data"] = $this->_reader->readUInt32LE();
break;
case 4:
$record["data"] = $this->_reader->readInt64LE();
break;
case 5:
$record["data"] = $this->_reader->readUInt16LE();
break;
}
$this->_descriptions[] = $record;
}
}
/**
* Returns the array of description records.
*
* @return Array
*/
public function getDescriptions() { return $this->_descriptions; }
}