Resolves #57 - default tuner configuration per tuner type was being

shared across multiple tuners of the same type, unless the user created
a new tuner configuration for each tuner. 

Updated code to create a default tuner configuration based on the tuner
type, but name the configuration as 'Default-UNIQUETUNERID', so that any
changes to that uniquely identified tuner will persist across sessions.

Note: this does not avoid the situation where multiple tuners of the
same type are all using the same default serial number (e.g. 0000001).
In this case, they will all still share the same configuraiton.  User
must change the serial number of the dongle in order for it to be
uniquely identifiable, so that we can correctly lookup the configuration
for the specific tuner.

src/settings/SettingsManager.java

@@ -557,11 +557,6 @@ public class SettingsManager
 		ArrayList<TunerConfiguration> configs = getSettings()
 				.getTunerConfigurations( type );
 
-		if( configs.isEmpty() )
-		{
-			configs.add( addNewTunerConfiguration( type, "Default" ) );
-		}
-		
 		return configs;
 	}
 	

src/source/tuner/TunerManager.java

@@ -544,16 +544,14 @@ public class TunerManager
     			}
     		}
     	}
-    	else
-    	{
-    		config = configs.get( 0 );
-    	}
     	
     	//If we're still null at this point, create a default config
     	if( config == null )
     	{
+    		String name = "Default-" + tuner.getUniqueID();
+    		
     		config = mResourceManager.getSettingsManager()
-				.addNewTunerConfiguration( tuner.getTunerType(), "Default" );
+				.addNewTunerConfiguration( tuner.getTunerType(), name );
     	}
     	
     	//Persist the config as the selected tuner configuration.  The method

src/source/tuner/rtl/RTL2832TunerController.java

@@ -55,8 +55,6 @@ import sample.complex.ComplexBuffer;
 import source.SourceException;
 import source.tuner.TunerController;
 import source.tuner.TunerType;
-import source.tuner.frequency.FrequencyChangeEvent;
-import source.tuner.frequency.FrequencyChangeEvent.Event;
 import buffer.FloatAveragingBuffer;
 import controller.ResourceManager;
 import controller.ThreadPoolManager;
@@ -1486,8 +1484,11 @@ public abstract class RTL2832TunerController extends TunerController
 				buffer.get( data );
 
 				buffer.rewind();
-
-				mFilledBuffers.add( data );
+				
+				if( mRunning.get() )
+				{
+					mFilledBuffers.add( data );
+				}
 				
 				mSampleCounter.addAndGet( transfer.actualLength() );
 				
@@ -1501,11 +1502,19 @@ public abstract class RTL2832TunerController extends TunerController
 			{
 				case LibUsb.TRANSFER_COMPLETED:
 					/* resubmit the transfer */
-					int result = LibUsb.submitTransfer( transfer );
-					
-					if( result != LibUsb.SUCCESS )
+					if( isRunning() )
+					{
+						int result = LibUsb.submitTransfer( transfer );
+						
+						if( result != LibUsb.SUCCESS )
+						{
+							mLog.error( "couldn't resubmit buffer transfer to tuner" );
+							LibUsb.freeTransfer( transfer );
+							mTransfers.remove( transfer );
+						}
+					}
+					else
 					{
-						mLog.error( "couldn't resubmit buffer transfer to tuner" );
 						LibUsb.freeTransfer( transfer );
 						mTransfers.remove( transfer );
 					}

src/source/tuner/rtl/r820t/R820TTunerConfiguration.java

@@ -34,7 +34,7 @@ public class R820TTunerConfiguration extends TunerConfiguration
 	private R820TLNAGain mLNAGain = R820TLNAGain.GAIN_222;
 	private R820TVGAGain mVGAGain = R820TVGAGain.GAIN_210;
 	private double mFrequencyCorrection = 0.0d;
-	private SampleRate mSampleRate = SampleRate.RATE_1_920MHZ;
+	private SampleRate mSampleRate = SampleRate.RATE_2_400MHZ;
 
 	/**
 	 * Default constructor for JAXB