def __init__(self, msgbinary):
super().__init__(msgbinary)
self.aidtype = self.navaidtypes[self.decode_sixbit_integer(
msgbinary[38:43])]
name = binary.decode_sixbit_ascii(msgbinary[43:163]).rstrip()
self.posfixaccuracy = self.accuracy[self.decode_sixbit_integer(
msgbinary[163:164])]
self.longitude = binary.decode_twos_complement(
msgbinary[164:192]) / 600000.0
self.latitude = binary.decode_twos_complement(
msgbinary[192:219]) / 600000.0
tobow = self.decode_sixbit_integer(msgbinary[219:228])
tostern = self.decode_sixbit_integer(msgbinary[228:237])
toport = self.decode_sixbit_integer(msgbinary[237:243])
tostarboard = self.decode_sixbit_integer(msgbinary[243:249])
self.length = tobow + tostern
self.width = toport + tostarboard
self.epfdfixtype = self.epfdfixtypes[self.decode_sixbit_integer(
msgbinary[249:253])]
self.timestampsecond = self.decode_sixbit_integer(msgbinary[253:259])
self.offposition = self.binaryflag[self.decode_sixbit_integer(
msgbinary[259:260])]
self.raim = self.binaryflag[self.decode_sixbit_integer(
msgbinary[268:269])]
self.virtualaid = self.binaryflag[self.decode_sixbit_integer(
msgbinary[269:270])]
self.assignedmode = self.binaryflag[self.decode_sixbit_integer(
msgbinary[270:271])]
nameextension = binary.decode_sixbit_ascii(msgbinary[272:361]).rstrip()
self.name = name + nameextension
def __init__(self, msgbinary):
super().__init__(msgbinary)
self.aisversion = self.decode_sixbit_integer(msgbinary[38:40])
self.imo = self.decode_sixbit_integer(msgbinary[40:70])
self.callsign = binary.decode_sixbit_ascii(msgbinary[70:112]).rstrip()
self.name = binary.decode_sixbit_ascii(msgbinary[112:232]).rstrip()
try:
self.shiptype = self.shiptypes[self.decode_sixbit_integer(
msgbinary[232:240])]
except KeyError:
self.shiptype = 'Unknown'
tobow = self.decode_sixbit_integer(msgbinary[240:249])
tostern = self.decode_sixbit_integer(msgbinary[249:258])
toport = self.decode_sixbit_integer(msgbinary[258:264])
tostarboard = self.decode_sixbit_integer(msgbinary[264:270])
self.length = tobow + tostern
self.width = toport + tostarboard
self.epfdfixtype = self.epfdfixtypes[self.decode_sixbit_integer(
msgbinary[270:274])]
etamonth = calendar.month_name[
self.decode_sixbit_integer(msgbinary[274:278])]
etaday = self.decode_sixbit_integer(msgbinary[278:283])
etahour = self.decode_sixbit_integer(msgbinary[283:288])
etamin = self.decode_sixbit_integer(msgbinary[288:294])
self.eta = '{:02d}:{:02d} {} {}'.format(
etahour, etamin, etaday, etamonth)
self.draught = self.decode_sixbit_integer(msgbinary[294:302]) / 10
self.destination = binary.decode_sixbit_ascii(
msgbinary[302:422]).rstrip()
self.dte = self.dtevalues[self.decode_sixbit_integer(
msgbinary[422:423])]
def __init__(self, msgbinary):
super().__init__(msgbinary)
self.sequenceno = self.decode_sixbit_integer(msgbinary[38:40])
self.destinationmmsi = self.decode_sixbit_integer(msgbinary[40:70])
self.retransmitflag = self.binaryflag[self.decode_sixbit_integer(
msgbinary[70:71])]
self.msgtext = binary.decode_sixbit_ascii(msgbinary[72:936]).rstrip()
def inland_static_and_voyage_data(self):
"""
sub message type that provides information on Inland Vessels
"""
self.msgsubtype = 'Inland Static & Voyage Data'
self.msgdetails['European Vessel ID'] = binary.decode_sixbit_ascii(
self.msgbinary[56:104])
self.msgdetails['Length'] = self.decode_sixbit_integer(
self.msgbinary[104:117]) / 10
self.msgdetails['Beam'] = self.decode_sixbit_integer(
self.msgbinary[117:127]) / 10
self.msgdetails['Ship Type'] = self.decode_sixbit_integer(
self.msgbinary[127:141])
self.msgdetails['Hazard'] = self.hazards[self.decode_sixbit_integer(
self.msgbinary[141:144])]
self.msgdetails['Draught'] = self.decode_sixbit_integer(
self.msgbinary[144:155]) / 100
self.msgdetails['Load Status'] = self.loadstatuses[
self.decode_sixbit_integer(self.msgbinary[155:157])]
self.msgdetails['Speed Measurement Quality'] = self.quality[
self.decode_sixbit_integer(self.msgbinary[157:158])]
self.msgdetails['Course Measurement Quality'] = self.quality[
self.decode_sixbit_integer(self.msgbinary[158:159])]
self.msgdetails['Heading Measurement Quality'] = self.quality[
self.decode_sixbit_integer(self.msgbinary[159:160])]
def __init__(self, msgbinary):
super().__init__(msgbinary)
self.speed = self.decode_sixbit_integer(msgbinary[46:56]) / 10
self.posfixaccuracy = self.accuracy[self.decode_sixbit_integer(
msgbinary[46:47])]
self.longitude = binary.decode_twos_complement(
msgbinary[57:85]) / 600000.0
self.latitude = binary.decode_twos_complement(
msgbinary[85:112]) / 600000.0
self.courseoverground = self.decode_sixbit_integer(
msgbinary[112:124]) / 10
self.trueheading = self.decode_sixbit_integer(msgbinary[124:133])
self.timestampsecond = self.decode_sixbit_integer(msgbinary[133:139])
self.name = binary.decode_sixbit_ascii(msgbinary[143:263]).rstrip()
try:
self.shiptype = self.shiptypes[self.decode_sixbit_integer(
msgbinary[263:271])]
except KeyError:
self.shiptype = 'Unknown'
tobow = self.decode_sixbit_integer(msgbinary[271:280])
tostern = self.decode_sixbit_integer(msgbinary[280:289])
toport = self.decode_sixbit_integer(msgbinary[289:295])
tostarboard = self.decode_sixbit_integer(msgbinary[295:301])
self.length = tobow + tostern
self.width = toport + tostarboard
self.epfdfixtype = self.epfdfixtypes[self.decode_sixbit_integer(
msgbinary[301:305])]
self.raim = self.binaryflag[self.decode_sixbit_integer(
msgbinary[305:306])]
self.dte = self.dtevalues[self.decode_sixbit_integer(
msgbinary[306:307])]
def __init__(self, msgbinary):
super().__init__(msgbinary)
self.partno = self.decode_sixbit_integer(msgbinary[38:40])
if self.partno == 0:
self.name = binary.decode_sixbit_ascii(msgbinary[40:160]).rstrip()
elif self.partno == 1:
self.shiptype = self.shiptypes[self.decode_sixbit_integer(
msgbinary[40:48])]
self.vendorid = binary.decode_sixbit_ascii(msgbinary[48:66])
self.unitmodelcode = self.decode_sixbit_integer(msgbinary[66:70])
self.serialno = self.decode_sixbit_integer(msgbinary[70:90])
self.callsign = binary.decode_sixbit_ascii(
msgbinary[90:132]).rstrip()
tobow = self.decode_sixbit_integer(msgbinary[240:249])
tostern = self.decode_sixbit_integer(msgbinary[249:258])
toport = self.decode_sixbit_integer(msgbinary[258:264])
tostarboard = self.decode_sixbit_integer(msgbinary[264:270])
self.length = tobow + tostern
self.width = toport + tostarboard
def test_ASCII_decode(self):
"""
Tests converting a binary string into readable text.
"""
testbinarystr = ('010100001000000101100000010001010101001001000011'
'001011100000000010010010001111010111001110'
'100000000110001111011000100000001010010101'
'001101010000010011100000001111010110000101'
'010010100000010100001000000101100000001100'
'000001011010011001100000000100001111000111'
'100000110000110001110010110011110100110101'
'110110110111111000111001')
expectedstr = 'THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG 0123456789'
resultstr = binary.decode_sixbit_ascii(testbinarystr[0:324])
self.assertEqual(expectedstr, resultstr)
def marine_traffic_signals(self):
"""
traffic information for entrance to a harbour which
traffic flow is controlled
"""
self.msgsubtype = "Marine Traffic Signals"
self.msgdetails['Message Linkage ID'] = self.decode_sixbit_integer(
self.msgbinary[56:66])
self.msgdetails['Signal Station Name'] = binary.decode_sixbit_ascii(
self.msgbinary[66:186]).rstrip()
self.msgdetails['Signal Status'] = \
self.signalstatus[self.decode_sixbit_integer(
self.msgbinary[235:237])]
self.msgdetails['Signal In Service'] = \
self.marinetrafficsignals[self.decode_sixbit_integer(
self.msgbinary[237:242])]
hour = self.decode_sixbit_integer(self.msgbinary[242:247])
minute = self.decode_sixbit_integer(self.msgbinary[247:253])
self.msgdetails['Time UTC'] = '{:02d}:{:02d}'.format(hour, minute)
self.msgdetails['Expected Next Signal'] = \
self.marinetrafficsignals[self.decode_sixbit_integer(
self.msgbinary[253:258])]
def test_empty_string_decode_sixbit_ascii(self):
"""
an empty string should raise a NoBinaryData exception
"""
with self.assertRaises(binary.NoBinaryData):
binary.decode_sixbit_ascii('')
