public function getControlURL($description_url, $service = 'AVTransport')
	{
		$description = $this->getDescription($description_url);

		switch($service)
		{
			case 'AVTransport':
				$serviceType = 'urn:schemas-upnp-org:service:AVTransport:1';
				break;
			default:
				$serviceType = 'urn:schemas-upnp-org:service:AVTransport:1';
				break;
		}

		foreach($description['device']['serviceList']['service'] as $service)
		{
			if($service['serviceType'] == $serviceType)
			{
				$url = parse_url($description_url);
				return $url['scheme'].'://'.$url['host'].':'.$url['port'].$service['controlURL'];
			}
		}
	}