R5Camera.device allows the user to change the video source for a stream without interupting the broadcast.
Touch the screen at any time while streaming to switch between broadcasting from the front facing and back facing camera.
R5Camera.device is a reference to the device set in instantiation of the R5Camera object. By getting the instance of R5Camera attached to the R5Stream object and changeing its device property, you can hot-swap sources for the stream. Once streaming, simply call:
let camera = self.publishStream?.getVideoSource() as! R5Camera
if(camera.device === frontCamera){
camera.device = backCamera;
}else{
camera.device = frontCamera;
}