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