/**
* Returns the box raw data.
*
* @return string
*/
public function __toString($data = "")
{
if ($this->isContainer())
foreach ($this->getBoxes() as $name => $boxes)
foreach ($boxes as $box)
$data .= $box;
$size = strlen($data) + 8;
if ($size > 0xffffffff)
$size += 8;
if (strlen($this->_type) > 4)
$size += 16;
return ($size > 0xffffffff ?
Transform::toUInt32BE(1) : Transform::toUInt32BE($size)) .
(strlen($this->_type) > 4 ? "uuid" : $this->_type) .
($size > 0xffffffff ? Transform::toInt64BE($size) : "") .
(strlen($this->_type) > 4 ? Transform::toGUID($this->_type) : "") . $data;
}