Processes a STATUS message.

def _process_media_status(self, data):
        """ Processes a STATUS message. """
        self.status.update(data)

        self.logger.debug("Media:Received status %s", data)

        # Update session active threading event
        if self.status.media_session_id is None:
            self.session_active_event.clear()
        else:
            self.session_active_event.set()

        self._fire_status_changed()