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<?php
/**
* PHP Reader Library
*
* Copyright (c) 2006-2008 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) 2006-2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id: ASF.php 108 2008-09-05 17:00:05Z svollbehr $
*/
/**#@+ @ignore */
require_once("Reader.php");
require_once("ASF/Object/Container.php");
/**#@-*/
/**
* This class represents a file in Advanced Systems Format (ASF) as described in
* {@link http://go.microsoft.com/fwlink/?LinkId=31334 The Advanced Systems
* Format (ASF) Specification}. It is a file format that can contain various
* types of information ranging from audio and video to script commands and
* developer defined custom streams.
*
* The ASF file consists of code blocks that are called content objects. Each
* of these objects have a format of their own. They may contain other objects
* or other specific data. Each supported object has been implemented as their
* own classes to ease the correct use of the information.
*
* @package php-reader
* @subpackage ASF
* @author Sven Vollbehr <svollbehr@gmail.com>
* @copyright Copyright (c) 2006-2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Rev: 108 $
*/
class ASF extends ASF_Object_Container
{
const HEADER = "75b22630-668e-11cf-a6d9-00aa0062ce6c";
const DATA = "75b22636-668e-11cf-a6d9-00aa0062ce6c";
const SIMPLE_INDEX = "33000890-e5b1-11cf-89f4-00a0c90349cb";
const INDEX = "d6e229d3-35da-11d1-9034-00a0c90349be";
const MEDIA_OBJECT_INDEX = "feb103f8-12ad-4c64-840f-2a1d2f7ad48c";
const TIMECODE_INDEX = "3cb73fd0-0c4a-4803-953d-edf7b6228f0c";
/** @var string */
private $_filename;
/**
* Constructs the ASF class with given file and options.
*
* The following options are currently recognized:
* o encoding -- Indicates the encoding that all the texts are presented
* with. By default this is set to utf-8. See the documentation of iconv
* for accepted values.
* o readonly -- Indicates that the file is read from a temporary location
* or another source it cannot be written back to.
*
* @param string $filename The path to the file or file descriptor of an
* opened file.
* @param Array $options The options array.
*/
public function __construct($filename, $options = array())
{
$this->_reader = new Reader($this->_filename = $filename);
$this->setOptions($options);
if ($this->getOption("encoding", false) === false)
$this->setOption("encoding", "utf-8");
$this->setOffset(0);
$this->setSize($this->_reader->getSize());
$this->constructObjects
(array
(self::HEADER => "Header",
self::DATA => "Data",
self::SIMPLE_INDEX => "SimpleIndex",
self::INDEX => "Index",
self::MEDIA_OBJECT_INDEX => "MediaObjectIndex",
self::TIMECODE_INDEX => "TimecodeIndex"));
}
/**
* Returns the mandatory header object contained in this file.
*
* @return ASF_Object_Header
*/
public function getHeader()
{
$header = $this->getObjectsByIdentifier(self::HEADER);
return $header[0];
}
/**
* Returns the mandatory data object contained in this file.
*
* @return ASF_Object_Data
*/
public function getData()
{
$data = $this->getObjectsByIdentifier(self::DATA);
return $data[0];
}
/**
* Returns an array of index objects contained in this file.
*
* @return Array
*/
public function getIndices()
{
return $this->getObjectsByIdentifier
(self::SIMPLE_INDEX . "|" . self::INDEX . "|" .
self::MEDIA_OBJECT_INDEX . "|" . self::TIMECODE_INDEX);
}
/**
* Writes the changes back to the original media file.
*
* Please note: currently the method writes only Content Description and
* Extended Content Description Objects.
*/
public function write()
{
throw new ASF_Exception("Not yet supported");
}
}
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