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<?php
/**
* PHP Reader Library
*
* Copyright (c) 2006-2008 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) 2006-2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id: FileProperties.php 102 2008-06-23 20:41:20Z svollbehr $
*/
/**#@+ @ignore */
require_once("ASF/Object.php");
/**#@-*/
/**
* The <i>File Properties Object</i> defines the global characteristics of the
* combined digital media streams found within the Data Object.
*
* @package php-reader
* @subpackage ASF
* @author Sven Vollbehr <svollbehr@gmail.com>
* @copyright Copyright (c) 2006-2008 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_FileProperties extends ASF_Object
{
/**
* Indicates, if set, that a file is in the process of being created (for
* example, for recording applications), and thus that various values stored
* in the header objects are invalid. It is highly recommended that
* post-processing be performed to remove this condition at the earliest
* opportunity.
*/
const BROADCAST = 1;
/**
* Indicates, if set, that a file is seekable. Note that for files containing
* a single audio stream and a <i>Minimum Data Packet Size</i> field equal to
* the <i>Maximum Data Packet Size</i> field, this flag shall always be set to
* 1. For files containing a single audio stream and a video stream or
* mutually exclusive video streams, this flag is only set to 1 if the file
* contains a matching <i>Simple Index Object</i> for each regular video
* stream.
*/
const SEEKABLE = 2;
/** @var string */
private $_fileId;
/** @var integer */
private $_fileSize;
/** @var integer */
private $_creationDate;
/** @var integer */
private $_dataPacketsCount;
/** @var integer */
private $_playDuration;
/** @var integer */
private $_sendDuration;
/** @var integer */
private $_preroll;
/** @var integer */
private $_flags;
/** @var integer */
private $_minimumDataPacketSize;
/** @var integer */
private $_maximumDataPacketSize;
/** @var integer */
private $_maximumBitrate;
/**
* 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->_fileSize = $this->_reader->readInt64LE();
$this->_creationDate = $this->_reader->readInt64LE();
$this->_dataPacketsCount = $this->_reader->readInt64LE();
$this->_playDuration = $this->_reader->readInt64LE();
$this->_sendDuration = $this->_reader->readInt64LE();
$this->_preroll = $this->_reader->readInt64LE();
$this->_flags = $this->_reader->readUInt32LE();
$this->_minimumDataPacketSize = $this->_reader->readUInt32LE();
$this->_maximumDataPacketSize = $this->_reader->readUInt32LE();
$this->_maximumBitrate = $this->_reader->readUInt32LE();
}
/**
* Returns the file id field.
*
* @return integer
*/
public function getFileId() { return $this->_fileId; }
/**
* Returns the size, in bytes, of the entire file. The value of this field is
* invalid if the broadcast flag bit in the flags field is set to 1.
*
* @return integer
*/
public function getFileSize() { return $this->_fileSize; }
/**
* Returns the date and time of the initial creation of the file. The value is
* given as the number of 100-nanosecond intervals since January 1, 1601,
* according to Coordinated Universal Time (Greenwich Mean Time). The value of
* this field may be invalid if the broadcast flag bit in the flags field is
* set to 1.
*
* @return integer
*/
public function getCreationDate() { return $this->_creationDate; }
/**
* Returns the number of Data Packet entries that exist within the
* {@link ASF_Object_Data Data Object}. The value of this field is invalid if
* the broadcast flag bit in the flags field is set to 1.
*
* @return integer
*/
public function getDataPacketsCount() { return $this->_dataPacketsCount; }
/**
* Returns the time needed to play the file in 100-nanosecond units. This
* value should include the duration (estimated, if an exact value is
* unavailable) of the the last media object in the presentation. The value of
* this field is invalid if the broadcast flag bit in the flags field is set
* to 1.
*
* @return integer
*/
public function getPlayDuration() { return $this->_playDuration; }
/**
* Returns the time needed to send the file in 100-nanosecond units. This
* value should include the duration of the last packet in the content. The
* value of this field is invalid if the broadcast flag bit in the flags field
* is set to 1.
*
* @return integer
*/
public function getSendDuration() { return $this->_sendDuration; }
/**
* Returns the amount of time to buffer data before starting to play the file,
* in millisecond units. If this value is nonzero, the <i>Play Duration</i>
* field and all of the payload <i>Presentation Time</i> fields have been
* offset by this amount. Therefore, player software must subtract the value
* in the preroll field from the play duration and presentation times to
* calculate their actual values.
*
* @return integer
*/
public function getPreroll() { return $this->_preroll; }
/**
* Checks whether or not the flag is set. Returns <var>true</var> if the flag
* is set, <var>false</var> otherwise.
*
* @param integer $flag The flag to query.
* @return boolean
*/
public function hasFlag($flag) { return ($this->_flags & $flag) == $flag; }
/**
* Returns the flags field.
*
* @return integer
*/
public function getFlags() { return $this->_flags; }
/**
* Returns the minimum <i>Data Packet</i> size in bytes. In general, the value
* of this field is invalid if the broadcast flag bit in the flags field is
* set to 1. However, the values for the <i>Minimum Data Packet Size</i> and
* <i>Maximum Data Packet Size</i> fields shall be set to the same value, and
* this value should be set to the packet size, even when the broadcast flag
* in the flags field is set to 1.
*
* @return integer
*/
public function getMinimumDataPacketSize()
{
return $this->_minimumDataPacketSize;
}
/**
* Returns the maximum <i>Data Packet</i> size in bytes. In general, the value
* of this field is invalid if the broadcast flag bit in the flags field is
* set to 1. However, the values for the <i>Minimum Data Packet Size</i> and
* <i>Maximum Data Packet Size</i> fields shall be set to the same value, and
* this value should be set to the packet size, even when the broadcast flag
* in the flags field is set to 1.
*
* @return integer
*/
public function getMaximumDataPacketSize()
{
return $this->_maximumDataPacketSize;
}
/**
* Returns the maximum instantaneous bit rate in bits per second for the
* entire file. This is equal the sum of the bit rates of the individual
* digital media streams.
*
* @return integer
*/
public function getMaximumBitrate() { return $this->_maximumBitrate; }
}
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