rik/plibreader
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add support for ISO base media file format

Browse Source 
git-svn-id: http://php-reader.googlecode.com/svn/trunk@85 51a70ab9-7547-0410-9469-37e369ee0574
This commit is contained in:
svollbehr
2008-04-23 20:21:36 +00:00
parent 3191721e15
commit 42d91f7e33
74 changed files with 7032 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

252
src/ISO14496/Box.php Normal file
View File

@@ -0,0 +1,252 @@
<?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 PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id$
*/
/**#@+ @ignore */
require_once("ISO14496/Exception.php");
/**#@-*/
/**
* A base class for all ISO 14496-12 boxes.
*
* @package php-reader
* @subpackage ISO 14496
* @author Sven Vollbehr <svollbehr@gmail.com>
* @copyright Copyright (c) 2008 PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Rev$
*/
class ISO14496_Box
{
/**
* The reader object.
*
* @var Reader
*/
protected $_reader;
/**
* The file offset to box start.
*
* @var integer
*/
protected $_offset;
/**
* The object size in bytes, including the size and type header, fields, and
* all contained boxes.
*
* @var integer
*/
protected $_size;
/** @var string */
protected $_type;
/** @var boolean */
protected $_container = false;
/**
* An array of boxes the box contains.
*
* @var Array
*/
protected $_boxes = array();
/**
* Constructs the class with given parameters.
*
* @param Reader $reader The reader object.
*/
public function __construct($reader)
{
$this->_reader = $reader;
$this->_offset = $this->_reader->getOffset();
$this->_size = $this->_reader->readUInt32BE();
$this->_type = $this->_reader->read(4);
if ($this->_size == 1)
$this->_size = $this->_reader->readInt64BE();
if ($this->_size == 0)
$this->_size = $this->_reader->getSize() - $offset;
if ($this->_type == "uuid")
$this->_type = $this->_reader->readGUID();
}
/**
* Returns the type of the ISO base media file object.
*
* @return string
*/
public function getType() { return $this->_type; }
/**
* Returns a boolean value corresponding to whether the box is a container.
*
* @return boolean
*/
public function isContainer() { return $this->_container; }
/**
* Returns a boolean value corresponding to whether the box is a container.
*
* @return boolean
*/
public function getContainer() { return $this->_container; }
/**
* Sets whether the box is a container.
*
* @param boolean $container Whether the box is a container.
*/
protected function setContainer($container)
{
$this->_container = $container;
}
/**
* Reads and constructs the boxes found within this box.
*/
protected function constructBoxes($defaultclassname = "ISO14496_Box")
{
while (true) {
$offset = $this->_reader->getOffset();
if ($offset >= $this->_offset + $this->_size)
break;
$size = $this->_reader->readUInt32BE();
$type = $this->_reader->read(4);
if ($size == 1)
$size = $this->_reader->readInt64BE();
if ($size == 0)
$size = $this->_reader->getSize() - $offset;
$this->_reader->setOffset($offset);
if (@fopen($filename = "ISO14496/Box/" . strtoupper($type) . ".php",
"r", true) !== false)
require_once($filename);
if (class_exists($classname = "ISO14496_Box_" . strtoupper($type)))
$box = new $classname($this->_reader);
else
$box = new $defaultclassname($this->_reader);
if (!isset($this->_boxes[$type]))
$this->_boxes[$type] = array();
$this->_boxes[$type][] = $box;
$this->_reader->setOffset($offset + $size);
}
}
/**
* Checks whether the box given as an argument is present in the file. Returns
* <var>true</var> if one or more boxes are present, <var>false</var>
* otherwise.
*
* @return boolean
* @throws ISO14496_Exception if called on a non-container box
*/
public function hasBox($identifier)
{
if (!$this->isContainer())
throw new ISO14496_Exception("Box not a container");
return isset($this->_boxes[$identifier]);
}
/**
* Returns all the boxes the file contains as an associate array. The box
* identifiers work as keys having an array of boxes as associated value.
*
* @return Array
* @throws ISO14496_Exception if called on a non-container box
*/
public function getBoxes()
{
if (!$this->isContainer())
throw new ISO14496_Exception("Box not a container");
return $this->_boxes;
}
/**
* Returns an array of boxes matching the given identifier or an empty array
* if no boxes matched the identifier.
*
* The identifier may contain wildcard characters "*" and "?". The asterisk
* matches against zero or more characters, and the question mark matches any
* single character.
*
* Please note that one may also use the shorthand $obj->identifier to access
* the first box with the identifier given. Wildcards cannot be used with
* the shorthand and they will not work with user defined uuid types.
*
* @return Array
* @throws ISO14496_Exception if called on a non-container box
*/
public function getBoxesByIdentifier($identifier)
{
if (!$this->isContainer())
throw new ISO14496_Exception("Box not a container");
$matches = array();
$searchPattern = "/^" .
str_replace(array("*", "?"), array(".*", "."), $identifier) . "$/i";
foreach ($this->_boxes as $identifier => $boxes)
if (preg_match($searchPattern, $identifier))
foreach ($boxes as $box)
$boxes[] = $box;
return $boxes;
}
/**
* Magic function so that $obj->value will work. If called on a container box,
* the method will first attempt to return the first contained box that
* matches the identifier, and if not found, invoke a getter method.
*
* If there are no boxes or getter methods with given name, the method
* will yield an exception.
*
* @param string $name The box or field name.
* @return mixed
*/
public function __get($name) {
if ($this->isContainer() && isset($this->_boxes[$name]))
return $this->_boxes[$name][0];
if (method_exists($this, "get" . ucfirst($name)))
return call_user_func(array($this, "get" . ucfirst($name)));
throw new ISO14496_Exception("Unknown box/field: " . $name);
}
}