151 lines
4.2 KiB
Python
151 lines
4.2 KiB
Python
import threading
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from owrx.source import SdrService
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from owrx.bands import Bandplan
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from csdr import dsp, output
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from owrx.wsjt import WsjtParser
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from owrx.aprs import AprsParser
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from owrx.config import PropertyManager
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import logging
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logger = logging.getLogger(__name__)
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class ServiceOutput(output):
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def __init__(self, frequency):
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self.frequency = frequency
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def getParser(self):
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# abstract method; implement in subclasses
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pass
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def receive_output(self, t, read_fn):
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parser = self.getParser()
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parser.setDialFrequency(self.frequency)
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target = self.pump(read_fn, parser.parse)
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threading.Thread(target=target).start()
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class WsjtServiceOutput(ServiceOutput):
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def getParser(self):
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return WsjtParser(WsjtHandler())
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def supports_type(self, t):
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return t == "wsjt_demod"
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class AprsServiceOutput(ServiceOutput):
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def getParser(self):
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return AprsParser(AprsHandler())
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def supports_type(self, t):
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return t == "packet_demod"
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class ServiceHandler(object):
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def __init__(self, source):
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self.services = []
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self.source = source
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self.startupTimer = None
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self.source.addClient(self)
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self.source.getProps().collect("center_freq", "samp_rate").wire(self.onFrequencyChange)
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self.scheduleServiceStartup()
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def onSdrAvailable(self):
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self.scheduleServiceStartup()
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def onSdrUnavailable(self):
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self.stopServices()
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def isSupported(self, mode):
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return mode in PropertyManager.getSharedInstance()["services_decoders"]
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def stopServices(self):
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for service in self.services:
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service.stop()
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self.services = []
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def startServices(self):
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for service in self.services:
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service.start()
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def onFrequencyChange(self, key, value):
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self.stopServices()
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if not self.source.isAvailable():
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return
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self.scheduleServiceStartup()
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def scheduleServiceStartup(self):
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if self.startupTimer:
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self.startupTimer.cancel()
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self.startupTimer = threading.Timer(10, self.updateServices)
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self.startupTimer.start()
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def updateServices(self):
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logger.debug("re-scheduling services due to sdr changes")
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self.stopServices()
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cf = self.source.getProps()["center_freq"]
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srh = self.source.getProps()["samp_rate"] / 2
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frequency_range = (cf - srh, cf + srh)
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self.services = [
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self.setupService(dial["mode"], dial["frequency"])
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for dial in Bandplan.getSharedInstance().collectDialFrequencies(frequency_range)
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if self.isSupported(dial["mode"])
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]
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def setupService(self, mode, frequency):
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logger.debug("setting up service {0} on frequency {1}".format(mode, frequency))
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# TODO selecting outputs will need some more intelligence here
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if mode == "packet":
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output = AprsServiceOutput(frequency)
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else:
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output = WsjtServiceOutput(frequency)
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d = dsp(output)
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d.nc_port = self.source.getPort()
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d.set_offset_freq(frequency - self.source.getProps()["center_freq"])
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if mode == "packet":
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d.set_demodulator("nfm")
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d.set_bpf(-4000, 4000)
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else:
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d.set_demodulator("usb")
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d.set_bpf(0, 3000)
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d.set_secondary_demodulator(mode)
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d.set_audio_compression("none")
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d.set_samp_rate(self.source.getProps()["samp_rate"])
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d.start()
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return d
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class WsjtHandler(object):
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def write_wsjt_message(self, msg):
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pass
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class AprsHandler(object):
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def write_aprs_data(self, data):
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pass
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class ServiceManager(object):
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sharedInstance = None
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@staticmethod
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def getSharedInstance():
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if ServiceManager.sharedInstance is None:
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ServiceManager.sharedInstance = ServiceManager()
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return ServiceManager.sharedInstance
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def start(self):
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if not PropertyManager.getSharedInstance()["services_enabled"]:
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return
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for source in SdrService.getSources().values():
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ServiceHandler(source)
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class Service(object):
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pass
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class WsjtService(Service):
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pass
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