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<?php
/**
* PHP Reader Library
*
* Copyright (c) 2008 The PHP Reader Project Workgroup. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the project workgroup nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package php-reader
* @subpackage ASF
* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id: MetadataLibrary.php 108 2008-09-05 17:00:05Z svollbehr $
*/
/**#@+ @ignore */
require_once("ASF/Object.php");
/**#@-*/
/**
* The <i>Metadata Library Object</i> 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
* <i>{@link ASF_Object_Metadata Metadata Object}</i>, 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 <svollbehr@gmail.com>
* @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 <i>Language List
* Object</i> that identifies the language of this attribute. If there is
* no <i>Language List Object</i> 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; }
}
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