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Add support for ASF

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git-svn-id: http://php-reader.googlecode.com/svn/trunk@4 51a70ab9-7547-0410-9469-37e369ee0574
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svollbehr
2008-03-03 11:48:28 +00:00
parent 16dd117216
commit 906e2dc59d
6 changed files with 817 additions and 0 deletions
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147
src/ASF/HeaderObject.php Normal file
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<?php
/**
* $Id$
*
*
* Copyright (C) 2006, 2007 The Bearpaw Project Work Group. All Rights Reserved.
* Copyright (C) 2007, 2008 BEHR Software Systems. 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 BEHR Software Systems 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
*/
/**#@+ @ignore */
require_once("Object.php");
/**#@-*/
/**
* The ASF_Header_Object object implementation. This object contains objects
* that give information about the file. See corresponding object classes for
* more.
*
* @package php-reader
* @author Sven Vollbehr <sven.vollbehr@behrss.eu>
* @copyright 2006, 2007 The Bearpaw Project Work Group
* @copyright 2007, 2008 BEHR Software Systems
* @license http://www.opensource.org/licenses/bsd-license.php New BSD License
* @version $Rev$
*/
final class ASF_HeaderObject extends ASF_Object
{
/**
* @var integer The number of the objects the header contains.
*/
private $_objectCount;
/**
* @var integer Internal variable to have the start of the stream stored in.
*/
private $_readerSOffset;
/**
* @var integer Internal variable to have the current position of the
* stream pointer stored in.
*/
private $_readerCOffset;
/**
* Default constructor. Initiates the class with given parameters and reads
* object information from the file.
*/
public function __construct($reader, $id, $size)
{
parent::__construct($reader, $id, $size);
$this->_readerSOffset = $this->_reader->getOffset();
$this->_objectCount = $this->_reader->getUInt32LE();
$this->_reader->skip(2);
$this->_readerCOffset = $this->_reader->getOffset();
}
/**
* Returns the number of standard ASF header objects this object contains.
*
* @return integer The number of objects the header contains.
*/
public function getObjectCount() { return $this->_objectCount; }
/**
* Checks whether there is more to be read within the bounds of the parent
* object size.
*
* @return boolean Boolean value corresponding whether there is more to read.
*/
public function hasChildObjects()
{
return ($this->_readerSOffset + $this->_size) > $this->_readerCOffset;
}
/**
* Returns the next standard ASF object or <var>false</var> if end of stream
* has been reached.
*
* @todo Only limited subset of possible child objects are regognized.
* @return ASF_Object Returns the appropriate object. Returned objects are of
* the type ASFObject or of any of the other object types that inherit
* from that base class.
*/
public function nextChildObject()
{
$object = false;
if ($this->hasChildObjects()) {
$this->_reader->setOffset($this->_readerCOffset);
$guid = $this->_reader->getGUID();
$size = $this->_reader->getInt64LE();
$offset = $this->_reader->getOffset();
switch ($guid) {
/* ASF_Content_Description_Object */
case "75b22633-668e-11cf-a6d9-00aa0062ce6c":
$object =
new ASF_ContentDescriptionObject($this->_reader, $guid, $size);
break;
/* ASF_Header_Extension_Object */
case "5fbf03b5-a92e-11cf-8ee3-00c00c205365":
$this->_reader->skip(48);
$this->_readerCOffset = $this->_reader->getOffset();
$object = $this->nextChildObject();
break;
/* ASF_Extended_Content_Description_Object */
case "d2d0a440-e307-11d2-97f0-00a0c95ea850":
$object = new ASF_ExtendedContentDescriptionObject
($this->_reader, $guid, $size);
break;
/* ASF_File_Properties_Object */
case "8cabdca1-a947-11cf-8ee4-00c00c205365":
$object = new ASF_FilePropertiesObject($this->_reader, $guid, $size);
break;
default: // not implemented
$object = new ASF_Object($this->_reader, $guid, $size);
}
$this->_reader->setOffset(($this->_readerCOffset = $offset - 24 + $size));
}
return $object;
}
}