openwebrx-clone/owrx/source/fifi_sdr.py

from owrx.command import Option
from .direct import DirectSource
from subprocess import Popen

import logging

logger = logging.getLogger(__name__)


class FifiSdrSource(DirectSource):
    def __init__(self, id, props):
        super().__init__(id, props)
        self.getCommandMapper().setBase("arecord").setMappings(
            {"device": Option("-D"), "samp_rate": Option("-r")}
        ).setStatic("-f S16_LE -c2 -")

    def getEventNames(self):
        return super().getEventNames() + ["device"]

    def getFormatConversion(self):
        return ["csdr convert_s16_f", "csdr gain_ff 30"]

    def sendRockProgFrequency(self, frequency):
        process = Popen(["echo", "--vco", "-w", "--", "freq={}".format(frequency / 1E6)])
        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"])

    def onPropertyChange(self, name, value):
        if name != "center_freq":
            return
        self.sendRockProgFrequency(value)