gr-air-modes/apps/modes_rx

#!/usr/bin/env python
# Copyright 2010, 2013 Nick Foster
# 
# This file is part of gr-air-modes
# 
# gr-air-modes is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
# 
# gr-air-modes is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with gr-air-modes; see the file COPYING.  If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
# 

from gnuradio.eng_option import eng_option
from gnuradio.gr.pubsub import pubsub
from optparse import OptionParser
import time, os, sys, threading, math
from string import split, join
import air_modes
from air_modes.types import *
from air_modes.exceptions import *
import zmq

#todo: maybe move plugins to separate programs (flightgear, SBS1, etc.)
def main():
  my_position = None
  usage = "%prog: [options]"
  optparser = OptionParser(option_class=eng_option, usage=usage)
  air_modes.modes_radio.add_radio_options(optparser)

  optparser.add_option("-l","--location", type="string", default=None,
                       help="GPS coordinates of receiving station in format xx.xxxxx,xx.xxxxx")
  #data source options
  optparser.add_option("-a","--remote", type="string", default=None,
                       help="specify additional servers from which to take data in format tcp://x.x.x.x:y,tcp://....")
  optparser.add_option("-n","--no-print", action="store_true", default=False,
                       help="disable printing decoded packets to stdout")
  #output plugins
  optparser.add_option("-K","--kml", type="string", default=None,
                       help="filename for Google Earth KML output")
  optparser.add_option("-P","--sbs1", action="store_true", default=False,
                       help="open an SBS-1-compatible server on port 30003")
  optparser.add_option("-m","--multiplayer", type="string", default=None,
                       help="FlightGear server to send aircraft data, in format host:port")

  (options, args) = optparser.parse_args()

  #construct the radio
  context = zmq.Context(1)
  tb = air_modes.modes_radio(options, context)
  servers = ["inproc://modes-radio-pub"]
  if options.remote is not None:
    servers += options.remote.split(",")
  relay = air_modes.zmq_pubsub_iface(context, subaddr=servers, pubaddr=None)

  #ok now relay is gonna get all those tasty strings
  #internally we want to distribute parsed data instead, lighten the load
  #TODO obviously this should go somewhere besides the main app. But where?
  publisher = pubsub()
  def make_report(pub, message):
    [data, ecc, reference, timestamp] = message.split()
    try:
        ret = air_modes.modes_report(air_modes.modes_reply(int(data, 16)),
                                     int(ecc, 16),
                                     20.0*math.log10(float(reference)),
                                     air_modes.stamp(0, float(timestamp)))
        pub["modes_dl"] = ret
        pub["type%i_dl" % ret.data.get_type()] = ret
    except ADSBError:
        pass

  send = lambda msg: make_report(publisher, msg)
  
  relay.subscribe("dl_data", send)

  if options.location is not None:
    my_position = [float(n) for n in options.location.split(",")]

  #CPR decoder obj to handle getting position from BDS0,5 and BDS0,6 pkts
  cpr_dec = air_modes.cpr.cpr_decoder(my_position)

  if options.kml is not None:
    dbname = 'adsb.db'
    lock = threading.Lock()
    sqldb = air_modes.output_sql(cpr_dec, dbname, lock, publisher) #input into the db
    kmlgen = air_modes.output_kml(options.kml, dbname, my_position, lock) #create a KML generating thread to read from the db

  if options.no_print is not True:
    printer = air_modes.output_print(cpr_dec, publisher)

  if options.multiplayer is not None:
    [fghost, fgport] = options.multiplayer.split(':')
    fgout = air_modes.output_flightgear(my_position, fghost, int(fgport))
    relay.subscribe("dl_data", fgout.output)

  if options.sbs1 is True:
    sbs1port = air_modes.output_sbs1(cpr_dec, 30003, publisher)

  tb.run()
  tb.close()

  relay.close()

  if options.kml is not None:
    kmlgen.close()
    

if __name__ == '__main__':
  main()