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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: Data.php 108 2008-09-05 17:00:05Z svollbehr $
*/
/**#@+ @ignore */
require_once("ASF/Object.php");
require_once("ASF/Object/Data/Packet.php");
/**#@-*/
/**
* The <i>Data Object</i> contains all of the <i>Data Packet</i>s for a file.
* These Data Packets are organized in terms of increasing send times. A <i>Data
* Packet</i> can contain interleaved data from several digital media streams.
* This data can consist of entire objects from one or more streams.
* Alternatively, it can consist of partial objects (fragmentation).
*
* Capabilities provided within the interleave packet definition include:
* o Single or multiple payload types per Data Packet
* o Fixed-size Data Packets
* o Error correction information (optional)
* o Clock information (optional)
* o Redundant sample information, such as presentation time stamp (optional)
*
* @todo Implement optional support for ASF Data Packet parsing
* @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_Data extends ASF_Object
{
/** @var string */
private $_fileId;
/** @var integer */
private $_totalDataPackets;
/** @var Array */
private $_dataPackets;
/**
* 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);
$this->_fileId = $this->_reader->readGUID();
$this->_totalDataPackets = $this->_reader->readInt64LE();
$this->_reader->skip(2);
/* Data packets are not supported
* for ($i = 0; $i < $this->_totalDataPackets; $i++) {
* $this->_dataPackets[] = new ASF_Object_Data_Packet($reader);
* }
*/
}
/**
* Returns the unique identifier for this ASF file. The value of this field
* is changed every time the file is modified in any way. The value of this
* field is identical to the value of the <i>File ID</i> field of the
* <i>Header Object</i>.
*
* @return string
*/
public function getFileId() { return $this->_fileId; }
/**
* Returns the number of ASF Data Packet entries that exist within the <i>Data
* Object</i>. It must be equal to the <i>Data Packet Count</i> field in the
* <i>File Properties Object</i>. The value of this field is invalid if the
* broadcast flag field of the <i>File Properties Object</i> is set to 1.
*
* @return integer
*/
public function getTotalDataPackets() { return $this->_endTime; }
/**
* Returns an array of Data Packets.
*
* @return Array
*/
public function getDataPackets()
{
throw new ASF_Exception("Data packets are not parsed due to optimization.");
}
}
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