introduce a generic mapping from sdr properties to soapy settings

owrx/source/rtl_sdr_soapy.py

@@ -1,19 +1,11 @@
 from .soapy import SoapyConnectorSource
-from owrx.command import Option
 
 
 class RtlSdrSoapySource(SoapyConnectorSource):
-    def getCommandMapper(self):
-        return super().getCommandMapper().setMappings({"direct_sampling": Option("-t direct_samp").setSpacer("=")})
+    def getSoapySettingsMappings(self):
+        mappings = super().getSoapySettingsMappings()
+        mappings.update({"direct_sampling": "direct_samp"})
+        return mappings
 
     def getDriver(self):
         return "rtlsdr"
-
-    def getEventNames(self):
-        return super().getEventNames() + ["direct_sampling"]
-
-    def onPropertyChange(self, prop, value):
-        if prop == "direct_sampling":
-            prop = "settings"
-            value = "direct_samp={0}".format(value)
-        super().onPropertyChange(prop, value)