/**
* Creates a box object from a string.
*
* @param $data
* @param bool $parent
*
* @return XenGallery_VideoInfo_Box_Abstract
*/
public function fromString(&$data, $parent = false)
{
if (strlen($data) < 8) {
throw new XenForo_Exception('Not enough data, need at least 8 bytes!');
}
$ar = unpack('NtotalSize/NboxType', $data);
if ($ar['totalSize'] == 1) {
$ar2 = unpack('N2extSize', substr($data, 8));
if ($ar2['extSize1'] > 0) {
throw new XenForo_Exception('Extended size not supported');
} else {
$ar['totalSize'] = $ar2['extSize2'];
}
$skip = 8;
} else {
$skip = 0;
}
if ($this->_isBoxSkippable($ar['boxType'])) {
$data = substr($data, $ar['totalSize']);
return $this->fromString($data, $parent);
}
$box = XenGallery_VideoInfo_Box_Abstract::create($ar['totalSize'], $ar['boxType'], substr($data, 8 + $skip), $this, $parent);
if ($box) {
$data = substr($data, $box->getTotalSize());
}
return $box;
}
