Progress toward rewriting the parser to be less insane.
This commit is contained in:
Nick Foster
@@ -25,122 +25,102 @@ import air_modes
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from air_modes.exceptions import *
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import math
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class output_print(air_modes.parse):
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def __init__(self, mypos):
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air_modes.parse.__init__(self, mypos)
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#TODO get rid of class and convert to functions
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#no need for class here
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class output_print:
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def __init__(self, mypos, publisher):
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#self._cpr = air_modes.cpr_decoder(mypos)
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#sub to every function that starts with "print"
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self._fns = [int(l[6:]) for l in dir(self) if l.startswith("handle")]
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for i in self._fns:
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publisher.subscribe("type%i_dl" % i, getattr(self, "handle%i" % i))
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publisher.subscribe("modes_dl", self.catch_nohandler)
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@staticmethod
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def prefix(msg):
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return "(%i %.8f) " % (msg.rssi, msg.timestamp)
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def catch_nohandler(self, msg):
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if msg.data.get_type() not in self._fns:
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retstr = output_print.prefix(msg)
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retstr += "No handler for message type %i" % msg.data.get_type()
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if "ap" in msg.data.fields:
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retstr += " from %.6x" % msg.data["ap"]
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print retstr
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def parse(self, message):
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[data, ecc, reference, timestamp] = message.split()
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ecc = long(ecc, 16)
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reference = float(reference)
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timestamp = float(timestamp)
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if reference == 0.0:
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refdb = -150.0
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else:
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refdb = 20.0*math.log10(reference)
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output = "(%.0f %.10f) " % (refdb, timestamp);
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def handle0(self, msg):
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try:
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data = air_modes.modes_reply(long(data, 16))
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msgtype = data["df"]
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if msgtype == 0:
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output += self.print0(data, ecc)
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elif msgtype == 4:
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output += self.print4(data, ecc)
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elif msgtype == 5:
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output += self.print5(data, ecc)
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elif msgtype == 11:
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output += self.print11(data, ecc)
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elif msgtype == 17:
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output += self.print17(data)
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elif msgtype == 20 or msgtype == 21 or msgtype == 16:
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output += self.printTCAS(data, ecc)
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retstr = output_print.prefix(msg)
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retstr += "Type 0 (short A-A surveillance) from %x at %ift" % (msg.ecc, air_modes.decode_alt(msg.data["ac"], True))
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ri = msg.data["ri"]
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if ri == 0:
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retstr += " (No TCAS)"
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elif ri == 2:
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retstr += " (TCAS resolution inhibited)"
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elif ri == 3:
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retstr += " (Vertical TCAS resolution only)"
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elif ri == 4:
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retstr += " (Full TCAS resolution)"
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elif ri == 9:
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retstr += " (speed <75kt)"
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elif ri > 9:
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retstr += " (speed %i-%ikt)" % (75 * (1 << (ri-10)), 75 * (1 << (ri-9)))
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else:
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output += "No handler for message type %i from %x (but it's in modes_parse)" % (msgtype, ecc)
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return output
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except NoHandlerError as e:
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output += "No handler for message type %s from %x" % (e.msgtype, ecc)
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return output
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except MetricAltError:
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pass
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except CPRNoPositionError:
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pass
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raise ADSBError
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def output(self, msg):
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try:
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parsed = self.parse(msg)
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if parsed is not None:
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print self.parse(msg)
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except ADSBError:
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pass
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except ADSBError:
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return
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def print0(self, shortdata, ecc):
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[vs, cc, sl, ri, altitude] = self.parse0(shortdata)
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retstr = "Type 0 (short A-A surveillance) from %x at %ift" % (ecc, altitude)
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if ri == 0:
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retstr += " (No TCAS)"
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elif ri == 2:
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retstr += " (TCAS resolution inhibited)"
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elif ri == 3:
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retstr += " (Vertical TCAS resolution only)"
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elif ri == 4:
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retstr += " (Full TCAS resolution)"
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elif ri == 9:
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retstr += " (speed <75kt)"
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elif ri > 9:
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retstr += " (speed %i-%ikt)" % (75 * (1 << (ri-10)), 75 * (1 << (ri-9)))
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if vs is True:
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if msg.data["vs"] is 1:
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retstr += " (aircraft is on the ground)"
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return retstr
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def print4(self, shortdata, ecc):
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[fs, dr, um, altitude] = self.parse4(shortdata)
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retstr = "Type 4 (short surveillance altitude reply) from %x at %ift" % (ecc, altitude)
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print retstr
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@staticmethod
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def fs_text(fs):
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if fs == 1:
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retstr += " (aircraft is on the ground)"
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return " (aircraft is on the ground)"
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elif fs == 2:
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retstr += " (AIRBORNE ALERT)"
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return " (AIRBORNE ALERT)"
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elif fs == 3:
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retstr += " (GROUND ALERT)"
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return " (GROUND ALERT)"
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elif fs == 4:
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retstr += " (SPI ALERT)"
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return " (SPI ALERT)"
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elif fs == 5:
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retstr += " (SPI)"
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return " (SPI)"
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else:
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raise ADSBError
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return retstr
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def handle4(self, msg):
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try:
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retstr = output_print.prefix(msg)
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retstr += "Type 4 (short surveillance altitude reply) from %x at %ift" % (msg.ecc, air_modes.decode_alt(msg.data["ac"], True))
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retstr += output_print.fs_text(msg.data["fs"])
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except ADSBError:
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return
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print retstr
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def print5(self, shortdata, ecc):
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[fs, dr, um, ident] = self.parse5(shortdata)
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def handle5(self, msg):
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try:
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retstr = output_print.prefix(msg)
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retstr += "Type 5 (short surveillance ident reply) from %x with ident %i" % (msg.ecc, air_modes.decode_id(msg.data["id"]))
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retstr += output_print.fs_text(msg.data["fs"])
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except ADSBError:
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return
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print retstr
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retstr = "Type 5 (short surveillance ident reply) from %x with ident %i" % (ecc, ident)
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def handle11(self, msg):
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try:
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retstr = output_print.prefix(msg)
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retstr += "Type 11 (all call reply) from %x in reply to interrogator %i with capability level %i" % (msg.data["aa"], msg.ecc & 0xF, msg.data["ca"]+1)
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except ADSBError:
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return
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print retstr
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if fs == 1:
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retstr += " (aircraft is on the ground)"
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elif fs == 2:
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retstr += " (AIRBORNE ALERT)"
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elif fs == 3:
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retstr += " (GROUND ALERT)"
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elif fs == 4:
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retstr += " (SPI ALERT)"
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elif fs == 5:
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retstr += " (SPI)"
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return retstr
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def print11(self, data, ecc):
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[icao24, interrogator, ca] = self.parse11(data, ecc)
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retstr = "Type 11 (all call reply) from %x in reply to interrogator %i with capability level %i" % (icao24, interrogator, ca+1)
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return retstr
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def print17(self, data):
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#the only one which requires state
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def handle17(self, data):
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return
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icao24 = data["aa"]
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bdsreg = data["me"].get_type()
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@@ -189,7 +169,8 @@ class output_print(air_modes.parse):
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return retstr
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def printTCAS(self, data, ecc):
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def printTCAS(self, msg):
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return
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msgtype = data["df"]
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if msgtype == 20 or msgtype == 16:
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#type 16 does not have fs, dr, um but we get alt here
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@@ -244,3 +225,7 @@ class output_print(air_modes.parse):
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retstr += " ident %x" % ident
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return retstr
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handle16 = printTCAS
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handle20 = printTCAS
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handle21 = printTCAS
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