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/STCO.php
+++ b/src/ISO14496/Box/STCO.php
@@ -0,0 +1,99 @@
+<?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>Chunk Offset Box</i> table gives the index of each chunk into the
+ * containing file. There are two variants, permitting the use of 32-bit or
+ * 64-bit offsets. The latter is useful when managing very large presentations.
+ * At most one of these variants will occur in any single instance of a sample
+ * table.
+ *
+ * Offsets are file offsets, not the offset into any box within the file (e.g.
+ * {@link ISO14496_Box_MDAT Media Data Box}). This permits referring to media
+ * data in files without any box structure. It does also mean that care must be
+ * taken when constructing a self-contained ISO file with its metadata
+ * ({@link ISO14496_Box_MOOV Movie Box}) at the front, as the size of the 
+ * {@link ISO14496_Box_MOOV Movie Box} will affect the chunk offsets to the
+ * media data.
+ *
+ * This box variant contains 32-bit offsets.
+ *
+ * @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_STCO extends ISO14496_Box_Full
+{
+  /** @var Array */
+  private $_chunkOffsetTable = 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 = 0; $i < $entryCount; $i++)
+      $this->_chunkOffsetTable[] = array
+        ("chunkOffset" => $this->_reader->readUInt32BE());
+  }
+  
+  /**
+   * Returns an array of values. Each entry is an array containing the following
+   * keys.
+   *   o chunkOffset -- a 32 bit integer that gives the offset of the start of a
+   *     chunk into its containing media file.
+   *
+   * @return Array
+   */
+  public function getChunkOffsetTable()
+  {
+    return $this->_chunkOffsetTable;
+  }
+}