a97d59bf89
git-svn-id: http://php-reader.googlecode.com/svn/trunk@92 51a70ab9-7547-0410-9469-37e369ee0574
109 lines
4.4 KiB
PHP
109 lines
4.4 KiB
PHP
<?php
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/**
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* PHP Reader Library
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*
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* Copyright (c) 2008 The PHP Reader Project Workgroup. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the project workgroup nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @package php-reader
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* @subpackage ISO 14496
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* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
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* @license http://code.google.com/p/php-reader/wiki/License New BSD License
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* @version $Id$
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*/
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/**#@+ @ignore */
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require_once("ISO14496/Box/Full.php");
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/**#@-*/
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/**
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* The <i>Edit List Box</i> contains an explicit timeline map. Each entry
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* defines part of the track time-line: by mapping part of the media time-line,
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* or by indicating empty time, or by defining a dwell, where a single
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* time-point in the media is held for a period.
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*
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* @package php-reader
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* @subpackage ISO 14496
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* @author Sven Vollbehr <svollbehr@gmail.com>
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* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
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* @license http://code.google.com/p/php-reader/wiki/License New BSD License
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* @version $Rev$
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*/
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final class ISO14496_Box_ELST extends ISO14496_Box_Full
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{
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/** @var Array */
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private $_entries = array();
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/**
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* Constructs the class with given parameters and reads box related data from
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* the ISO Base Media file.
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*
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* @param Reader $reader The reader object.
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*/
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public function __construct($reader, &$options = array())
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{
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parent::__construct($reader, $options);
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$entryCount = $this->_reader->readUInt32BE();
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for ($i = 1; $i <= $entryCount; $i++) {
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$entry = array();
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if ($this->getVersion() == 1) {
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$entry["segmentDuration"] = $this->_reader->readInt64BE();
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$entry["mediaTime"] = $this->_reader->readInt64BE();
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} else {
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$entry["segmentDuration"] = $this->_reader->readUInt32BE();
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$entry["mediaTime"] = $this->_reader->readInt32BE();
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}
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$entry["mediaRate"] = $this->_reader->readInt16BE() +
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$this->_reader->readInt16BE() / 10;
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$this->_entries[] = $entry;
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}
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}
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/**
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* Returns an array of entries. Each entry is an array containing the
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* following keys.
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* o segmentDuration: specifies the duration of this edit segment in units
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* of the timescale in the {@link ISO14496_Box_MVHD Movie Header Box}.
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* o mediaTime: the starting time within the media of this edit segment (in
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* media time scale units, in composition time). If this field is set to
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* –1, it is an empty edit. The last edit in a track shall never be an
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* empty edit. Any difference between the duration in the
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* {@link ISO14496_Box_MVHD Movie Header Box}, and the track's duration is
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* expressed as an implicit empty edit at the end.
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* o mediaRate: the relative rate at which to play the media corresponding
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* to this edit segment. If this value is 0, then the edit is specifying
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* a dwell: the media at media-time is presented for the segment-duration.
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* Otherwise this field shall contain the value 1.
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*
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* @return Array
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*/
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public function getEntries()
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{
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return $this->_entries;
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}
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}
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