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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 ISO 14496
* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id: TFRA.php 92 2008-05-10 13:43:14Z svollbehr $
*/
/**#@+ @ignore */
require_once("ISO14496/Box/Full.php");
/**#@-*/
/**
* Each entry contains the location and the presentation time of the random
* accessible sample. It indicates that the sample in the entry can be random
* accessed. Note that not every random accessible sample in the track needs to
* be listed in the table.
*
* The absence of the <i>Track Fragment Random Access Box</i> does not mean that
* all the samples are sync samples. Random access information in the
* {@link ISO14496_Box_TRUN Track Fragment Run Box},
* {@link ISO14496_Box_TRAF Track Fragment Box} and
* {@link ISO14496_Box_TREX Track Fragment Box} shall be set appropriately
* regardless of the presence of this box.
*
* @package php-reader
* @subpackage ISO 14496
* @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: 92 $
*/
final class ISO14496_Box_TFRA extends ISO14496_Box_Full
{
/** @var integer */
private $_trackId;
/** @var Array */
private $_degradationPriorityTable = array();
/**
* Constructs the class with given parameters and reads box related data from
* the ISO Base Media file.
*
* @param Reader $reader The reader object.
*/
public function __construct($reader, &$options = array())
{
parent::__construct($reader, $options);
$this->_trackId = $this->_reader->readUInt32BE();
$trafNumberSize = (($tmp = $this->_reader->readUInt32BE()) >> 4) & 0x3;
$trunNumberSize = ($tmp >> 2) & 0x3;
$sampleNumberSize = $tmp & 0x3;
$entryCount = $this->_reader->readUInt32BE();
for ($i = 1; $i <= $entryCount; $i++) {
$entry = array();
if ($this->getVersion() == 1) {
$entry["time"] = $this->_reader->readInt64BE();
$entry["moofOffset"] = $this->_reader->readInt64BE();
} else {
$entry["time"] = $this->_reader->readUInt32BE();
$entry["moofOffset"] = $this->_reader->readUInt32BE();
}
$entry["trafNumber"] =
($trafNumberSize == 4 ? $this->_reader->readUInt32BE() :
($trafNumberSize == 8 ? $this->_reader->readInt64BE() : 0));
$entry["trunNumber"] =
($trunNumberSize == 4 ? $this->_reader->readUInt32BE() :
($trunNumberSize == 8 ? $this->_reader->readInt64BE() : 0));
$entry["sampleNumber"] =
($sampleNumberSize == 4 ? $this->_reader->readUInt32BE() :
($sampleNumberSize == 8 ? $this->_reader->readInt64BE() : 0));
$this->_degradationPriorityTable[$i] = $entry;
}
}
/**
* Returns the track identifier.
*
* @return integer
*/
public function getTrackId() { return $this->_trackId; }
/**
* Returns an array of entries. Each entry is an array containing the
* following keys.
* o time -- a 32 or 64 bits integer that indicates the presentation time of
* the random access sample in units defined in the
* {@link ISO14496_Box_MDHD Media Header Box} of the associated track.
* o moofOffset -- a 32 or 64 bits integer that gives the offset of the
* {@link ISO14496_Box_MOOF Movie Fragment Box} used in this entry. Offset
* is the byte-offset between the beginning of the file and the beginning
* of the Movie Fragment Box.
* o trafNumber -- indicates the {@link ISO14496_Box_TRAF Track Fragment
* Box} number that contains the random accessible sample. The number
* ranges from 1 (the first traf is numbered 1) in each Track Fragment
* Box.
* o trunNumber -- indicates the {@link ISO14496_Box_TRUN Track Fragment Run
* Box} number that contains the random accessible sample. The number
* ranges from 1 in each Track Fragment Run Box.
* o sampleNumber -- indicates the sample number that contains the random
* accessible sample. The number ranges from 1 in each Track Fragment Run
* Box.
*
* @return Array
*/
public function getDegradationPriorityTable()
{
return $this->_degradationPriorityTable;
}
}
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