Example #1
0
    def __init__(self, port):
        """ Constructor
        """
        super(CaptureService, self).__init__(port, True)
        self._update_state(CaptureService.StateValue.OK)
        self.__hyperion_connector = None
        self.__delay_timer = DelayTimer()

        # Register settings.
        self._register_settings_unit([Setting.HYPERION_IP_ADDRESS,
                                      Setting.HYPERION_PROTO_PORT],
                                     self.__update_hyperion_connector)

        self._register_settings_unit([Setting.CAPTURE_FRAME_RATE],
                                     self.__update_timer)

        self._register_settings_unit([Setting.CAPTURE_SCALE_WIDTH,
                                      Setting.CAPTURE_SCALE_HEIGHT,
                                      Setting.CAPTURE_PRIORITY])
Example #2
0
class CaptureService(BaseService):
    """ Capture Service class.
    """

    class StateValue(object):
        """ State Value class.
        """
        OK = 1
        ERROR = 2

    __ERROR_DELAY = 5
    __IMAGE_DURATION = 500

    def __init__(self, port):
        """ Constructor
        """
        super(CaptureService, self).__init__(port, True)
        self._update_state(CaptureService.StateValue.OK)
        self.__hyperion_connector = None
        self.__delay_timer = DelayTimer()

        # Register settings.
        self._register_settings_unit([Setting.HYPERION_IP_ADDRESS,
                                      Setting.HYPERION_PROTO_PORT],
                                     self.__update_hyperion_connector)

        self._register_settings_unit([Setting.CAPTURE_FRAME_RATE],
                                     self.__update_timer)

        self._register_settings_unit([Setting.CAPTURE_SCALE_WIDTH,
                                      Setting.CAPTURE_SCALE_HEIGHT,
                                      Setting.CAPTURE_PRIORITY])

    def _setup(self):
        self.__update_hyperion_connector()

    def _enable(self, enable):
        if enable:
            try:
                self.__hyperion_connector.connect()
            except HyperionError:
                pass
        else:
            self.__hyperion_connector.disconnect()

    def __update_hyperion_connector(self):
        if self.__hyperion_connector is not None:
            self.__hyperion_connector.disconnect()
        self.__hyperion_connector = HyperionProto(
            self._get_setting(Setting.HYPERION_IP_ADDRESS),
            self._get_setting(Setting.HYPERION_PROTO_PORT))

    def __update_timer(self):
        self.__delay_timer.set_delay(
            1.0 / self._get_setting(Setting.CAPTURE_FRAME_RATE))

    def __update_pixel_buffer(self):
        self.__data = self.scale_pixel_buffer(
            self.get_pixel_buffer(),
            self._get_setting(Setting.CAPTURE_SCALE_WIDTH),
            self._get_setting(Setting.CAPTURE_SCALE_HEIGHT))

    def _run_service(self):
        self.__delay_timer.start()

        try:
            # Check that an hyperion connection is available.
            if not self.__hyperion_connector.is_connected():
                self.__hyperion_connector.connect()
                self._update_state(CaptureService.StateValue.OK)

            # Capture frame.
            self.__update_pixel_buffer()

            # Send to hyperion server.
            self.__hyperion_connector.send_image(
                self._get_setting(Setting.CAPTURE_SCALE_WIDTH),
                self._get_setting(Setting.CAPTURE_SCALE_HEIGHT),
                self.__data.get_pixels(),
                self._get_setting(Setting.CAPTURE_PRIORITY),
                CaptureService.__IMAGE_DURATION)

        except HyperionError as err:
            self._update_state(CaptureService.StateValue.ERROR, err.msg)
            self._safe_delay(CaptureService.__ERROR_DELAY)

        # Wait until next run.
        self.__delay_timer.delay()

    # TODO Maybe use Gst?
    @staticmethod
    def get_pixel_buffer():
        win = Gdk.get_default_root_window()
        h = win.get_height()
        w = win.get_width()
        return Gdk.pixbuf_get_from_window(win, 0, 0, w, h)

    # @staticmethod
    # def get_pixel_buffer():
    #     from PyQt5.QtWidgets import QApplication
    #     app = QApplication([])
    #     return QApplication.screens()[0].grabWindow(
    #         QApplication.desktop().winId()).toImage()

    @staticmethod
    def scale_pixel_buffer(pixel_buffer, width, height):
        return pixel_buffer.scale_simple(width, height,
                                         GdkPixbuf.InterpType.BILINEAR)