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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: BandwidthSharing.php 108 2008-09-05 17:00:05Z svollbehr $
*/
/**#@+ @ignore */
require_once("ASF/Object.php");
/**#@-*/
/**
* The <i>Bandwidth Sharing Object</i> indicates streams that share bandwidth in
* such a way that the maximum bandwidth of the set of streams is less than the
* sum of the maximum bandwidths of the individual streams. There should be one
* instance of this object for each set of objects that share bandwidth. Whether
* or not this object can be used meaningfully is content-dependent.
*
* @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_BandwidthSharing extends ASF_Object
{
const SHARING_EXCLUSIVE = "af6060aa-5197-11d2-b6af-00c04fd908e9";
const SHARING_PARTIAL = "af6060ab-5197-11d2-b6af-00c04fd908e9";
/** @var string */
private $_sharingType;
/** @var integer */
private $_dataBitrate;
/** @var integer */
private $_bufferSize;
/** @var Array */
private $_streamNumbers = 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);
$this->_sharingType = $this->_reader->readGUID();
$this->_dataBitrate = $this->_reader->readUInt32LE();
$this->_bufferSize = $this->_reader->readUInt32LE();
$streamNumbersCount = $this->_reader->readUInt16LE();
for ($i = 0; $i < $streamNumbersCount; $i++)
$this->_streamNumbers[] = $this->_reader->readUInt16LE();
}
/**
* Returns the type of sharing relationship for this object. Two types are
* predefined: SHARING_PARTIAL, in which any number of the streams in the
* relationship may be streaming data at any given time; and
* SHARING_EXCLUSIVE, in which only one of the streams in the relationship
* may be streaming data at any given time.
*
* @return string
*/
public function getSharingType() { return $this->_sharingType; }
/**
* Returns the leak rate R, in bits per second, of a leaky bucket that
* contains the data portion of all of the streams, excluding all ASF Data
* Packet overhead, without overflowing. The size of the leaky bucket is
* specified by the value of the Buffer Size field. This value can be less
* than the sum of all of the data bit rates in the
* {@link ASF_Object_ExtendedStreamProperties Extended Stream Properties}
* Objects for the streams contained in this bandwidth-sharing relationship.
*
* @return integer
*/
public function getDataBitrate() { return $this->_dataBitrate; }
/**
* Specifies the size B, in bits, of the leaky bucket used in the Data Bitrate
* definition. This value can be less than the sum of all of the buffer sizes
* in the {@link ASF_Object_ExtendedStreamProperties Extended Stream
* Properties} Objects for the streams contained in this bandwidth-sharing
* relationship.
*
* @return integer
*/
public function getBufferSize() { return $this->_bufferSize; }
/**
* Returns an array of stream numbers.
*
* @return Array
*/
public function getStreamNumbers() { return $this->_streamNumbers; }
}
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