Add support for ISO base media file format

git-svn-id: http://php-reader.googlecode.com/svn/trunk@85 51a70ab9-7547-0410-9469-37e369ee0574
2008-04-23 20:21:36 +00:00
parent 3191721e15
commit 42d91f7e33
74 changed files with 7032 additions and 0 deletions
--- a/src/ISO14496/Box/ELST.php
+++ b/src/ISO14496/Box/ELST.php
@@ -0,0 +1,108 @@
+<?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    $Id$
+ */
+
+/**#@+ @ignore */
+require_once("ISO14496/Box/Full.php");
+/**#@-*/
+
+/**
+ * The <i>Edit List Box</i> contains an explicit timeline map. Each entry
+ * defines part of the track time-line: by mapping part of the media time-line,
+ * or by indicating empty time, or by defining a dwell, where a single
+ * time-point in the media is held for a period.
+ *
+ * @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    $Rev$
+ */
+final class ISO14496_Box_ELST extends ISO14496_Box_Full
+{
+  /** @var Array */
+  private $_entries = 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)
+  {
+    parent::__construct($reader);
+    
+    $entryCount = $this->_reader->readUInt32BE();
+    for ($i = 1; $i <= $entryCount; $i++) {
+      $entry = array();
+      if ($this->getVersion() == 1) {
+        $entry["segmentDuration"] = $this->_reader->readInt64BE();
+        $entry["mediaTime"] = $this->_reader->readInt64BE();
+      } else {
+        $entry["segmentDuration"] = $this->_reader->readUInt32BE();
+        $entry["mediaTime"] = $this->_reader->readInt32BE();
+      }
+      $entry["mediaRate"] = $this->_reader->readInt16BE() +
+        $this->_reader->readInt16BE() / 10;
+      $this->_entries[] = $entry;
+    }
+  }
+  
+  /**
+   * Returns an array of entries. Each entry is an array containing the
+   * following keys.
+   *   o segmentDuration: specifies the duration of this edit segment in units
+   *     of the timescale in the {@link ISO14496_Box_MVHD Movie Header Box}.
+   *   o mediaTime: the starting time within the media of this edit segment (in
+   *     media time scale units, in composition time). If this field is set to
+   *     –1, it is an empty edit. The last edit in a track shall never be an
+   *     empty edit. Any difference between the duration in the
+   *     {@link ISO14496_Box_MVHD Movie Header Box}, and the track’s duration is
+   *     expressed as an implicit empty edit at the end.
+   *   o mediaRate: the relative rate at which to play the media corresponding
+   *     to this edit segment. If this value is 0, then the edit is specifying
+   *     a dwell: the media at media-time is presented for the segment-duration.
+   *     Otherwise this field shall contain the value 1.
+   *
+   * @return Array
+   */
+  public function getEntries()
+  {
+    return $this->_entries;
+  }
+}