Add enhanced support for ASF files (partial)

git-svn-id: http://php-reader.googlecode.com/svn/trunk@102 51a70ab9-7547-0410-9469-37e369ee0574
2008-06-23 20:41:20 +00:00
parent 95345494fb
commit 3a84731d55
30 changed files with 3278 additions and 460 deletions
--- a/src/ASF/Object/CodecList.php
+++ b/src/ASF/Object/CodecList.php
@@ -0,0 +1,98 @@
+<?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 ASF
+ * @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("ASF/Object.php");
+/**#@-*/
+
+/**
+ * The <i>Codec List Object</i> provides user-friendly information about the
+ * codecs and formats used to encode the content found in the ASF file.
+ *
+ * @package    php-reader
+ * @subpackage ASF
+ * @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 ASF_Object_CodecList extends ASF_Object
+{
+  const VIDEO_CODEC = 0x1;
+  const AUDIO_CODEC = 0x2;
+  const UNKNOWN_CODEC = 0xffff;
+  
+  /** @var Array */
+  private $_entries = array();
+  
+  /**
+   * Constructs the class with given parameters and reads object related data
+   * from the ASF file.
+   *
+   * @param Reader $reader  The reader object.
+   * @param Array  $options The options array.
+   */
+  public function __construct($reader, &$options = array())
+  {
+    parent::__construct($reader, $options);
+    
+    $this->_reader->skip(16);
+    $codecEntriesCount = $this->_reader->readUInt32LE();
+    for ($i = 0; $i < $codecEntriesCount; $i++) {
+      $entry = array("type" => $this->_reader->readUInt16LE());
+      $codecNameLength = $this->_reader->readUInt16LE() * 2;
+      $entry["codecName"] = iconv
+        ("utf-16le", $this->getOption("encoding"),
+         $this->_reader->readString16LE($codecNameLength));
+      $codecDescriptionLength = $this->_reader->readUInt16LE() * 2;
+      $entry["codecDescription"] = iconv
+        ("utf-16le", $this->getOption("encoding"),
+         $this->_reader->readString16LE($codecDescriptionLength));
+      $codecInformationLength = $this->_reader->readUInt16LE();
+      $entry["codecInformation"] =
+        $this->_reader->read($codecInformationLength);
+      $this->_entries[] = $entry;
+    }
+  }
+
+  /**
+   * Returns the array of codec entries.
+   *
+   * @return Array
+   */
+  public function getEntries() { return $this->_entries; }
+}