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