refactor sources to be more flexible

owrx/source/sdrplay.py

@@ -4,18 +4,3 @@ from .soapy import SoapyConnectorSource
 class SdrplaySource(SoapyConnectorSource):
     def getDriver(self):
         return "sdrplay"
-
-    def getEventNames(self):
-        return super().getEventNames() + ["antenna"]
-
-    def getCommand(self):
-        cmd = (
-                "soapy_connector -p {port} -c {controlPort}".format(port=self.port, controlPort=self.controlPort)
-                + ' -s {samp_rate} -f {tuner_freq} -g "{rf_gain}" -P {ppm} -a "{antenna}" -d "{device}"'
-        )
-        values = self.getCommandValues()
-        if values["iqswap"]:
-            cmd += " -i"
-        if self.rtlProps["rtltcp_compat"]:
-            cmd += " -r"
-        return cmd