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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;
+ }
+}