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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: Object.php 102 2008-06-23 20:41:20Z svollbehr $
*/
/**#@+ @ignore */
require_once("ASF/Exception.php");
/**#@-*/
/**
* The base unit of organization for ASF files is called the ASF object. It
* consists of a 128-bit GUID for the object, a 64-bit integer object size, and
* the variable-length object data.
*
* @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: 102 $
*/
class ASF_Object
{
/**
* The reader object.
*
* @var Reader
*/
protected $_reader;
/**
* The options array.
*
* @var Array
*/
protected $_options;
/** @var integer */
private $_offset = -1;
/** @var string */
private $_id;
/** @var integer */
private $_size = -1;
/** @var ASF_Object */
private $_parent = null;
/**
* Constructs the class with given parameters and options.
*
* @param Reader $reader The reader object.
* @param Array $options The options array.
*/
public function __construct($reader, &$options = array())
{
$this->_reader = $reader;
$this->_options = $options;
$this->_offset = $this->_reader->getOffset();
$this->_id = $this->_reader->readGUID();
$this->_size = $this->_reader->readInt64LE();
}
/**
* Returns the file offset to box start, or -1 if the box was created on heap.
*
* @return integer
*/
public function getOffset() { return $this->_offset; }
/**
* Sets the file offset where the box starts.
*
* @param integer $offset The file offset to box start.
*/
public function setOffset($offset) { $this->_offset = $offset; }
/**
* Returns the GUID of the ASF object.
*
* @return string
*/
public function getIdentifier() { return $this->_id; }
/**
* Set the GUID of the ASF object.
*
* @param string $id The GUID
*/
public function setIdentifier($id) { $this->_id = $id; }
/**
* Returns the object size in bytes, including the header.
*
* @return integer
*/
public function getSize() { return $this->_size; }
/**
* Sets the box size. The size must include the header.
*
* @param integer $size The box size.
*/
public function setSize($size)
{
if ($this->_parent !== null)
$this->_parent->setSize
(($this->_parent->getSize() > 0 ? $this->_parent->getSize() : 0) +
$size - ($this->_size > 0 ? $this->_size : 0));
$this->_size = $size;
}
/**
* Returns the options array.
*
* @return Array
*/
public function getOptions() { return $this->_options; }
/**
* Returns the given option value, or the default value if the option is not
* defined.
*
* @param string $option The name of the option.
* @param mixed $defaultValue The default value to be returned.
*/
public function getOption($option, $defaultValue = false)
{
if (isset($this->_options[$option]))
return $this->_options[$option];
return $defaultValue;
}
/**
* Sets the options array. See {@link ISO14496} class for available options.
*
* @param Array $options The options array.
*/
public function setOptions(&$options) { $this->_options = $options; }
/**
* Sets the given option the given value.
*
* @param string $option The name of the option.
* @param mixed $value The value to set for the option.
*/
public function setOption($option, $value)
{
$this->_options[$option] = $value;
}
/**
* Returns the parent object containing this box.
*
* @return ASF_Object
*/
public function getParent() { return $this->_parent; }
/**
* Sets the parent containing object.
*
* @param ASF_Object $parent The parent object.
*/
public function setParent(&$parent) { $this->_parent = $parent; }
/**
* Magic function so that $obj->value will work.
*
* @param string $name The field name.
* @return mixed
*/
public function __get($name)
{
if (method_exists($this, "get" . ucfirst($name)))
return call_user_func(array($this, "get" . ucfirst($name)));
throw new ASF_Exception("Unknown field: " . $name);
}
/**
* Magic function so that assignments with $obj->value will work.
*
* @param string $name The field name.
* @param string $value The field value.
* @return mixed
*/
public function __set($name, $value)
{
if (method_exists($this, "set" . ucfirst($name)))
call_user_func(array($this, "set" . ucfirst($name)), $value);
else throw new ASF_Exception("Unknown field: " . $name);
}
}
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