openwebrx-clone/owrx/source/fifi_sdr.py

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from owrx.command import Option
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from owrx.source.direct import DirectSource, DirectSourceDeviceDescription
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from subprocess import Popen
from csdr.chain import Chain
from pycsdr.modules import Convert, Gain
from pycsdr.types import Format
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import logging
logger = logging.getLogger(__name__)
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class FifiSdrSource(DirectSource):
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def getCommandMapper(self):
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return (
super()
.getCommandMapper()
.setBase("arecord")
.setMappings({"device": Option("-D"), "samp_rate": Option("-r")})
.setStatic("-t raw -f S16_LE -c2 -")
)
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def getEventNames(self):
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return super().getEventNames() + ["device"]
def getFormatConversion(self) -> Chain:
return Chain([Convert(Format.COMPLEX_SHORT, Format.COMPLEX_FLOAT), Gain(Format.COMPLEX_FLOAT, 5.0)])
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def sendRockProgFrequency(self, frequency):
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process = Popen(["rockprog", "--vco", "-w", "--freq={}".format(frequency / 1e6)])
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process.communicate()
rc = process.wait()
if rc != 0:
logger.warning("rockprog failed to set frequency; rc=%i", rc)
def preStart(self):
values = self.getCommandValues()
self.sendRockProgFrequency(values["tuner_freq"])
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def onPropertyChange(self, changes):
if "center_freq" in changes:
self.sendRockProgFrequency(changes["center_freq"])
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class FifiSdrDeviceDescription(DirectSourceDeviceDescription):
def getName(self):
return "FiFi SDR"
def supportsPpm(self):
# not currently mapped, and it's unclear how this should be sent to the device
return False