from owrx.config.core import CoreConfig from owrx.config import Config import csdr from csdr.output import Output import threading from owrx.source import SdrSourceEventClient, SdrSourceState, SdrClientClass from owrx.property import PropertyStack import logging logger = logging.getLogger(__name__) class SpectrumThread(Output, SdrSourceEventClient): def __init__(self, sdrSource): self.sdrSource = sdrSource super().__init__() stack = PropertyStack() stack.addLayer(0, self.sdrSource.props) stack.addLayer(1, Config.get()) self.props = props = stack.filter( "samp_rate", "fft_size", "fft_fps", "fft_voverlap_factor", "fft_compression", ) self.dsp = dsp = csdr.Dsp(self) dsp.nc_port = self.sdrSource.getPort() dsp.set_demodulator("fft") def set_fft_averages(changes=None): samp_rate = props["samp_rate"] fft_size = props["fft_size"] fft_fps = props["fft_fps"] fft_voverlap_factor = props["fft_voverlap_factor"] dsp.set_fft_averages( int(round(1.0 * samp_rate / fft_size / fft_fps / (1.0 - fft_voverlap_factor))) if fft_voverlap_factor > 0 else 0 ) self.subscriptions = [ props.wireProperty("samp_rate", dsp.set_samp_rate), props.wireProperty("fft_size", dsp.set_fft_size), props.wireProperty("fft_fps", dsp.set_fft_fps), props.wireProperty("fft_compression", dsp.set_fft_compression), props.filter("samp_rate", "fft_size", "fft_fps", "fft_voverlap_factor").wire(set_fft_averages), ] set_fft_averages() dsp.set_temporary_directory(CoreConfig().get_temporary_directory()) logger.debug("Spectrum thread initialized successfully.") def start(self): self.sdrSource.addClient(self) if self.sdrSource.isAvailable(): self.dsp.start() def supports_type(self, t): return t == "audio" def receive_output(self, type, read_fn): threading.Thread(target=self.pump(read_fn, self.sdrSource.writeSpectrumData)).start() def stop(self): self.dsp.stop() self.sdrSource.removeClient(self) for c in self.subscriptions: c.cancel() self.subscriptions = [] def getClientClass(self) -> SdrClientClass: return SdrClientClass.USER def onStateChange(self, state: SdrSourceState): if state is SdrSourceState.STOPPING: self.dsp.stop() elif state is SdrSourceState.RUNNING: self.dsp.start() def onFail(self): self.dsp.stop() def onShutdown(self): self.dsp.stop()