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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: TRUN.php 92 2008-05-10 13:43:14Z svollbehr $
*/
/**#@+ @ignore */
require_once("ISO14496/Box/Full.php");
/**#@-*/
/**
* Within the {@link ISO14496_Box_TRAF Track Fragment Box}, there are zero or
* more <i>Track Fragment Run Boxes</i>. If the durationIsEmpty flag is set,
* there are no track runs.
*
* @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_TRUN extends ISO14496_Box_Full
{
/** @var integer */
private $_dataOffset;
/** @var Array */
private $_samples = array();
/** Indicates the precense of the dataOffset field. */
const DATA_OFFSET = 0x1;
/**
* Indicates the precense of the firstSampleFlags field; this over-rides the
* default flags for the first sample only. This makes it possible to record
* a group of frames where the first is a key and the rest are difference
* frames, without supplying explicit flags for every sample. If this flag and
* field are used, sampleFlags field shall not be present.
*/
const FIRST_SAMPLE_FLAGS = 0x4;
/**
* Indicates that each sample has its own duration, otherwise the default is
* used.
*/
const SAMPLE_DURATION = 0x100;
/**
* Indicates that each sample has its own size, otherwise the default is used.
*/
const SAMPLE_SIZE = 0x200;
/**
* Indicates that each sample has its own flags, otherwise the default is
* used.
*/
const SAMPLE_FLAGS = 0x400;
/**
* Indicates that each sample has a composition time offset (e.g. as used for
* I/P/B video in MPEG).
*/
const SAMPLE_COMPOSITION_TIME_OFFSETS = 0x800;
/**
* 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);
$flags = $this->_flags;
$sampleCount = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::DATA_OFFSET))
$this->_dataOffset = $this->_reader->readInt32BE();
if ($this->hasFlag(self::FIRST_SAMPLE_FLAGS))
$this->_flags = $this->_reader->readUInt32BE();
for ($i = 0; $i < $sampleCount; $i++) {
$sample = array();
if ($this->hasFlag(self::SAMPLE_DURATION))
$sample["duration"] = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::SAMPLE_SIZE))
$sample["size"] = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::SAMPLE_FLAGS))
$sample["flags"] = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::SAMPLE_COMPOSITION_TIME_OFFSET))
$sample["compositionTimeOffset"] = $this->_reader->readUInt32BE();
$this->_samples[] = $sample;
$this->_flags = $flags;
}
}
/**
* Returns the data offset.
*
* @return integer
*/
public function getDataOffset()
{
return $this->_trackId;
}
/**
* Returns the array of samples.
*
* @return Array
*/
public function getSamples()
{
return $this->_samples;
}
}
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