public static extern bool TryGetCurrentDirection(RtpTransceiverSafeHandle rtpTransceiver, ref RtpTransceiverDirection outDirection);
public static extern void SetDirection(RtpTransceiverSafeHandle rtpTransceiver, RtpTransceiverDirection direction);
public static extern RtpTransceiverDirection GetDirection(RtpTransceiverSafeHandle rtpTransceiver);
public static extern int GetMediaKind(RtpTransceiverSafeHandle rtpTransceiver);
public static extern IntPtr Mid(RtpTransceiverSafeHandle rtpTransceiver);
public static extern IntPtr GetReceiver(RtpTransceiverSafeHandle rtpTransceiver);