camera.py 文件源码

def stop_streaming(self, camera_name):
        """
        Stop camera streaming by given the camera name.

        @type camera_name: str
        @param camera_name: camera name

        @rtype: bool
        @return: False if camera not exists in camera name list or not able
                 to stop streaming camera. True if the camera not is streaming
                 mode or the camera successfully stop streaming.
        """
        if not self.verify_camera_exists(camera_name):
            return False
        elif self._camera_streaming_status(camera_name):
            self.cameras_io[camera_name]['interface'].set_signal_value(
                "camera_streaming", False)
            if self._camera_streaming_status(camera_name):
                rospy.logerr(' '.join(["Failed to stop", camera_name,
                " from streaming on this robot."]))
                return False
            else:
                return True
        else: # Camera not in streaming mode
            return True