Airplay device name

Is there any way of discovering the name of the device when the user started to cast to it? The only thing I found was this

let route = AVAudioSession.sharedInstance().currentRoute
        for output in route.outputs where output.portType == .airPlay {
            infoDict["deviceName"] = output.portName
            infoDict["portType"] = output.portType.rawValue
        }

but the output.portName returns the portType instead of the portName.