def decode_msg_5(bit_arr: bitarray.bitarray) -> Dict[str, Any]: """ Static and Voyage Related Data Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_5_static_and_voyage_related_data """ get_int_from_data = partial(get_int, bit_arr) return { 'type': get_int_from_data(0, 6), 'repeat': get_int_from_data(6, 8), 'mmsi': get_mmsi(bit_arr, 8, 38), 'ais_version': get_int_from_data(38, 40), 'imo': get_int_from_data(40, 70), 'callsign': decode_bin_as_ascii6(bit_arr[70:112]), 'shipname': decode_bin_as_ascii6(bit_arr[112:232]), 'shiptype': ShipType(get_int_from_data(232, 240)), 'to_bow': get_int_from_data(240, 249), 'to_stern': get_int_from_data(249, 258), 'to_port': get_int_from_data(258, 264), 'to_starboard': get_int_from_data(264, 270), 'epfd': EpfdType(get_int_from_data(270, 274)), 'month': get_int_from_data(274, 278), 'day': get_int_from_data(278, 283), 'hour': get_int_from_data(283, 288), 'minute': get_int_from_data(288, 294), 'draught': get_int_from_data(294, 302) / 10.0, 'destination': decode_bin_as_ascii6(bit_arr[302:422]), 'dte': bit_arr[-2] }
def decode_msg_24(bit_arr: bitarray.bitarray) -> Dict[str, Any]: """ Static Data Report Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_24_static_data_report """ get_int_from_data = partial(get_int, bit_arr) data = { 'type': get_int_from_data(0, 6), 'repeat': get_int_from_data(8, 8), 'mmsi': get_mmsi(bit_arr, 8, 38), 'partno': get_int_from_data(38, 40) } d: Dict[str, Any] if not data['partno']: # Part A d = { 'shipname': decode_bin_as_ascii6(bit_arr[40: 160]) } else: # Part B d = { 'shiptype': ShipType(get_int_from_data(40, 48)), 'vendorid': decode_bin_as_ascii6(bit_arr[48: 66]), 'model': get_int_from_data(66, 70), 'serial': get_int_from_data(70, 90), 'callsign': decode_bin_as_ascii6(bit_arr[90: 132]), 'to_bow': get_int_from_data(132, 141), 'to_stern': get_int_from_data(141, 150), 'to_port': get_int_from_data(150, 156), 'to_starboard': get_int_from_data(156, 162), 'mothership_mmsi': get_mmsi(bit_arr, 132, 162) } data.update(d) return data
def decode_msg_21(bit_arr: bitarray.bitarray) -> Dict[str, Any]: """ Aid-to-Navigation Report Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_21_aid_to_navigation_report """ get_int_from_data = partial(get_int, bit_arr) return { 'type': get_int_from_data(0, 6), 'repeat': get_int_from_data(8, 8), 'mmsi': get_mmsi(bit_arr, 8, 38), 'aid_type': NavAid(get_int_from_data(38, 43)), 'name': decode_bin_as_ascii6(bit_arr[43:163]), 'accuracy': bit_arr[163], 'lon': get_int_from_data(164, 192, signed=True) / 600000.0, 'lat': get_int_from_data(192, 219, signed=True) / 600000.0, 'to_bow': get_int_from_data(219, 228), 'to_stern': get_int_from_data(228, 237), 'to_port': get_int_from_data(237, 243), 'to_starboard': get_int_from_data(243, 249), 'epfd': EpfdType(get_int_from_data(249, 253)), 'second': get_int_from_data(253, 259), 'off_position': bit_arr[259], 'regional': get_int_from_data(260, 268), 'raim': bit_arr[268], 'virtual_aid': bit_arr[269], 'assigned': bit_arr[270], 'name_extension': decode_bin_as_ascii6(bit_arr[272:]), }
def decode_msg_19(bit_arr: bitarray.bitarray) -> Dict[str, Any]: """ Extended Class B CS Position Report Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_19_extended_class_b_cs_position_report """ get_int_from_data = partial(get_int, bit_arr) return { 'type': get_int_from_data(0, 6), 'repeat': get_int_from_data(8, 8), 'mmsi': get_mmsi(bit_arr, 8, 38), 'speed': get_int_from_data(46, 56) * 0.1, 'accuracy': bit_arr[56], 'lon': get_int_from_data(57, 85, signed=True) / 600000.0, 'lat': get_int_from_data(85, 112, signed=True) / 600000.0, 'course': get_int_from_data(112, 124) * 0.1, 'heading': get_int_from_data(124, 133), 'second': get_int_from_data(133, 139), 'regional': get_int_from_data(139, 143), 'shipname': decode_bin_as_ascii6(bit_arr[143:263]), 'shiptype': ShipType(get_int_from_data(263, 271)), 'to_bow': get_int_from_data(271, 280), 'to_stern': get_int_from_data(280, 289), 'to_port': get_int_from_data(289, 295), 'to_starboard': get_int_from_data(295, 301), 'epfd': EpfdType(get_int_from_data(301, 305)), 'raim': bit_arr[305], 'dte': bit_arr[306], 'assigned': bit_arr[307], }
def test_encode_ascii_6_bit(): input_val = '001000000101001100001100001111100000010111001111010010001100000100100001' b = bitarray.bitarray(input_val) ascii6, padding = encode_ascii_6(b) assert ascii6 == "85<<?PG?B<4Q" assert padding == 0 bit_arr = decode_into_bit_array(ascii6.encode()) assert bit_arr.to01() == input_val assert decode_bin_as_ascii6(bit_arr) == "HELLO WORLD!"
def decode_msg_14(bit_arr: bitarray.bitarray) -> Dict[str, Any]: """ Safety-Related Broadcast Message Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_14_safety_related_broadcast_message """ get_int_from_data = partial(get_int, bit_arr) return { 'type': get_int_from_data(0, 6), 'repeat': get_int_from_data(6, 8), 'mmsi': get_mmsi(bit_arr, 8, 38), 'text': decode_bin_as_ascii6(bit_arr[40:]) }
def decode_msg_12(bit_arr: bitarray.bitarray) -> Dict[str, Any]: """ Addressed Safety-Related Message Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_12_addressed_safety_related_message """ get_int_from_data = partial(get_int, bit_arr) return { 'type': get_int_from_data(0, 6), 'repeat': get_int_from_data(6, 8), 'mmsi': get_mmsi(bit_arr, 8, 38), 'seqno': get_int_from_data(38, 40), 'dest_mmsi': get_mmsi(bit_arr, 40, 70), 'retransmit': bit_arr[70], 'text': decode_bin_as_ascii6(bit_arr[72:]) }