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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: AdvancedContentEncryption.php 108 2008-09-05 17:00:05Z svollbehr $
*/
/**#@+ @ignore */
require_once("ASF/Object.php");
/**#@-*/
/**
* The <i>Advanced Content Encryption Object</i> lets authors protect content by
* using Next Generation Windows Media Digital Rights Management for Network
* Devices.
*
* @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_AdvancedContentEncryption extends ASF_Object
{
const WINDOWS_MEDIA_DRM_NETWORK_DEVICES =
"7a079bb6-daa4-4e12-a5ca-91d3 8dc11a8d";
/** @var Array */
private $_contentEncryptionRecords = 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);
$contentEncryptionRecordsCount = $this->_reader->readUInt16LE();
for ($i = 0; $i < $contentEncryptionRecordsCount; $i++) {
$entry = array("systemId" => $this->_reader->readGUID(),
"systemVersion" => $this->_reader->readUInt32LE(),
"streamNumbers" => array());
$encryptedObjectRecordCount = $this->_reader->readUInt16LE();
for ($j = 0; $j < $encryptedObjectRecordCount; $j++) {
$this->_reader->skip(4);
$entry["streamNumbers"][] = $this->_reader->readUInt16LE();
}
$dataCount = $this->_reader->readUInt32LE();
$entry["data"] = $this->_reader->read($dataCount);
$this->_contentEncryptionRecords[] = $entry;
}
}
/**
* Returns an array of content encryption records. Each record consists of the
* following keys.
*
* o systemId -- Specifies the unique identifier for the content encryption
* system.
*
* o systemVersion -- Specifies the version of the content encryption
* system.
*
* o streamNumbers -- An array of stream numbers a particular Content
* Encryption Record is associated with.
*
* o data -- The content protection data for this Content Encryption Record.
*
* @return Array
*/
public function getContentEncryptionRecords()
{
return $this->_contentEncryptionRecords;
}
}
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