HackRF - final check-in. Changed all tuners to use the low-level API of the usb4java library to resolve limitation in high-level API that constrains maximum sample rate to ~2.0 MHz. Added console logging to logback.

config/logback.xml

@@ -12,9 +12,19 @@
       <pattern>%-25(%d{ddMMyyyy HHmmss} [%thread]) %-5level %logger{30} - %msg%n</pattern>
     </encoder>
   </appender>
-        
+
   <root level="DEBUG">
     <appender-ref ref="FILE" />
   </root>
-  
+
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%-16(%d{HH:mm:ss.SSS} [%thread]) %-5level %logger{30} - %msg%n</pattern>
+    </encoder>
+  </appender>
+          
+  <root level="DEBUG">
+    <appender-ref ref="STDOUT" />
+  </root>
+
 </configuration>

src/decode/am/AMDecoder.java

@@ -6,6 +6,9 @@ import decode.Decoder;
 import decode.DecoderType;
 import dsp.am.AMDemodulator;
 import dsp.filter.DCRemovalFilter2;
+import dsp.filter.FilterFactory;
+import dsp.filter.FloatFIRFilter;
+import dsp.filter.Window.WindowType;
 
 public class AMDecoder extends Decoder
 {
@@ -13,10 +16,11 @@ public class AMDecoder extends Decoder
      * This value determines how quickly the DC remove filter responds to 
      * changes in frequency.
      */
-    private static final double DC_REMOVAL_RATIO = 0.000003;
+    private static final double DC_REMOVAL_RATIO = 0.003;
 
     private AMDemodulator mDemodulator;
     private DCRemovalFilter2 mDCRemovalFilter;
+    private FloatFIRFilter mLowPassFilter;
     
     public AMDecoder( SampleType sampleType )
     {
@@ -50,7 +54,14 @@ public class AMDecoder extends Decoder
              * Route the demodulated, filtered samples back to this class to send
              * to all registered listeners
              */
-            mDCRemovalFilter.setListener( this.getFloatReceiver() );
+            
+            mLowPassFilter = new FloatFIRFilter( 
+            		FilterFactory.getLowPass( 48000, 3000, 31, 
+            				WindowType.COSINE ), 100.0 );
+            
+            mDCRemovalFilter.setListener( mLowPassFilter );
+            
+            mLowPassFilter.setListener( this.getFloatReceiver() );
         }
     }
 

src/dsp/am/AMDemodulator.java

@@ -14,7 +14,7 @@ public class AMDemodulator implements Listener<ComplexSample>
 
     public AMDemodulator()
     {
-        this( FilterFactory.getLowPass( 48000, 2000, 73, WindowType.HAMMING ), 
+        this( FilterFactory.getLowPass( 48000, 3000, 73, WindowType.HAMMING ), 
                 1000.0 );
     }
     
@@ -53,8 +53,8 @@ public class AMDemodulator implements Listener<ComplexSample>
         public void receive( ComplexSample sample )
         {
             float demodulated = (float)Math.abs( 
-                Math.sqrt( ( sample.real() * sample.real() ) +
+                    Math.sqrt( ( sample.real() * sample.real() ) +
-                           ( sample.imaginery() * sample.imaginery() ) ) ); 
+                               ( sample.imaginery() * sample.imaginery() ) ) ); 
             
             mBroadcaster.broadcast( demodulated * 30.0f );
         }

src/gui/control/JFrequencyControl.java

@@ -138,7 +138,7 @@ public class JFrequencyControl extends JPanel implements FrequencyChangeListener
     {
 		if( event.getAttribute() == Attribute.FREQUENCY )
 		{
-			setFrequency( (int)event.getValue(), false );
+			setFrequency( (long)event.getValue(), false );
 		}
     }
 	
@@ -202,7 +202,7 @@ public class JFrequencyControl extends JPanel implements FrequencyChangeListener
 	{
         private static final long serialVersionUID = 1L;
         private int mPower = 0;
-        private int mValue = 0;
+        private long mValue = 0;
         
         private Digit( int position ) throws ParseException
         {
@@ -225,17 +225,17 @@ public class JFrequencyControl extends JPanel implements FrequencyChangeListener
         public void setFrequency( long frequency, boolean fireChangeEvent )
         {
         	//Strip the digits higher than this one
-        	long lower = frequency % (int)( Math.pow( 10, mPower + 1) );
+        	long lower = frequency % (long)( Math.pow( 10, mPower + 1) );
 
         	//Set the value to int value of dividing by 10 to this power
-        	int value = (int)( lower / (int)( Math.pow( 10, mPower ) ) );
+        	long value = (long)( lower / (long)( Math.pow( 10, mPower ) ) );
         	
         	set( value, fireChangeEvent );
         }
         
         public long getFrequency()
         {
-        	return mValue * (int)Math.pow( 10, mPower );
+        	return mValue * (long)Math.pow( 10, mPower );
         }
 
         public void increment()
@@ -261,7 +261,7 @@ public class JFrequencyControl extends JPanel implements FrequencyChangeListener
         /**
          * Convenience wrapper to change amount and fire change event
          */
-        private void set( int amount )
+        private void set( long amount )
         {
         	set( amount, true );
         }
@@ -269,7 +269,7 @@ public class JFrequencyControl extends JPanel implements FrequencyChangeListener
         /**
          * Changes the value and optionally fires change event to listeners
          */
-        private void set( int amount, boolean fireChangeEvent )
+        private void set( long amount, boolean fireChangeEvent )
         {
         	mValue = amount;
 

src/source/mixer/MixerManager.java

@@ -197,6 +197,11 @@ public class MixerManager
         mLog.info( sb.toString() );
 	}
 	
+	public HashMap<String,MixerTunerDataLine> getMixerTuners()
+	{
+		return mMixerTuners;
+	}
+	
 	private TargetDataLine getTargetDataLine( Mixer.Info mixerInfo, AudioFormat format )
 	{
 		TargetDataLine retVal = null;

src/source/mixer/SampleAdapter.java

@@ -17,7 +17,6 @@
  ******************************************************************************/
 package source.mixer;
 
-import source.Source.SampleType;
 
 /*
  * Adapter to convert byte data received from a data stream into float[] 

src/source/tuner/FrequencyController.java

@@ -38,7 +38,7 @@ public class FrequencyController
 	public FrequencyController( Tunable tunable,
 								long minFrequency,
 								long maxFrequency,
-								double frequencyCorrection ) throws SourceException
+								double frequencyCorrection )
 	{
 		mTunable = tunable;
 		mMinimumFrequency = minFrequency;
@@ -148,7 +148,7 @@ public class FrequencyController
      */
     private long getCorrectedFrequency( long tunedFrequency )
     {
-		return (int)( (double)tunedFrequency / 
+		return (long)( (double)tunedFrequency / 
 				( 1.0 - ( mFrequencyCorrection / 1000000.0 ) ) );
     }
     

src/source/tuner/MixerTuner.java

@@ -21,6 +21,9 @@ import java.util.ArrayList;
 
 import javax.sound.sampled.TargetDataLine;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import sample.Listener;
 import sample.complex.ComplexSampleListListener;
 import source.mixer.MixerSource;
@@ -28,6 +31,9 @@ import source.mixer.SampleAdapter;
 
 public abstract class MixerTuner extends Tuner
 {
+	private final static Logger mLog = 
+							LoggerFactory.getLogger( MixerTuner.class );
+
 	private TargetDataLine mTargetDataLine;
 	protected MixerTunerType mMixerTunerType;
 	protected MixerSource mMixerSource;

src/source/tuner/Tuner.java

@@ -48,6 +48,13 @@ public abstract class Tuner implements FrequencyChangeBroadcaster,
 		mName = name;
 	}
 	
+	public String toString()
+	{
+		return mName;
+	}
+	
+	public abstract void dispose();
+	
 	public void setName( String name )
 	{
 		mName = name;

src/source/tuner/TunerController.java

@@ -51,7 +51,6 @@ public abstract class TunerController implements Tunable
 	 * class, tuning a frequency, or setting the bandwidth
 	 */
 	public TunerController( long minimumFrequency, long maximumFrequency ) 
-			throws SourceException
 	{
 		mFrequencyController = new FrequencyController( this, 
 														minimumFrequency, 

src/source/tuner/TunerManager.java

@@ -23,20 +23,17 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.concurrent.RejectedExecutionException;
 
-import javax.usb.UsbDevice;
-import javax.usb.UsbException;
-import javax.usb.UsbHostManager;
-import javax.usb.UsbHub;
-import javax.usb.UsbServices;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.Device;
+import org.usb4java.DeviceDescriptor;
+import org.usb4java.DeviceList;
+import org.usb4java.LibUsb;
 
 import source.Source;
 import source.SourceException;
 import source.config.SourceConfigTuner;
 import source.mixer.MixerManager;
-import source.tuner.ettus.B100Tuner;
 import source.tuner.fcd.FCDTuner;
 import source.tuner.fcd.proV1.FCD1TunerController;
 import source.tuner.fcd.proplusV2.FCD2TunerController;
@@ -46,27 +43,34 @@ import source.tuner.rtl.RTL2832Tuner;
 import source.tuner.rtl.RTL2832TunerController;
 import source.tuner.rtl.e4k.E4KTunerController;
 import source.tuner.rtl.r820t.R820TTunerController;
-import source.tuner.usb.USBTunerDevice;
 import controller.ResourceManager;
 import controller.channel.ProcessingChain;
 
 public class TunerManager
 {
 	private final static Logger mLog = 
-			LoggerFactory.getLogger( TunerManager.class );
+							LoggerFactory.getLogger( TunerManager.class );
-
-	private static final String sLOADED = "\t[LOADED]\t";
-	private static final String sNOT_LOADED = "\t[NOT LOADED]\t";
 
 	private ResourceManager mResourceManager;
-
 	private ArrayList<Tuner> mTuners = new ArrayList<Tuner>();
-
+	
     public TunerManager( ResourceManager resourceManager )
 	{
     	mResourceManager = resourceManager;
-		loadTuners();
+    	
+    	/* initialize mixers */
+    	MixerManager.getInstance();
+    	
+    	initTuners();
 	}
+    
+    /**
+     * Performs cleanup of USB related issues
+     */
+    public void dispose()
+    {
+    	LibUsb.exit( null );
+    }
 
     /**
      * Iterates current tuners to get a tuner channel source for the frequency
@@ -121,127 +125,103 @@ public class TunerManager
     /**
      * Loads all USB tuners and USB/Mixer tuner devices
      */
-	private void loadTuners()
+	private void initTuners()
 	{
-		mTuners.clear();
+		DeviceList deviceList = new DeviceList();
 
-		//Get list of attached USB tuner devices
+		int result = LibUsb.init( null );
-		ArrayList<USBTunerDevice> devices = getUSBTunerDevices();
 
-		StringBuilder sb = new StringBuilder();
+		if( result != LibUsb.SUCCESS )
-		
-		sb.append( "discovered and using [" + devices.size() + 
-				"] available tuner devices\n" );
-
-		mLog.info( "inspecting [" + devices.size() + "] available usb tuner devices" );
-		
-		int counter = 0;
-		
-		for( USBTunerDevice device: devices )
 		{
-			counter++;
+			mLog.error( "unable to initialize libusb [" + 
+						LibUsb.errorName( result ) + "]" );
+		}
+		else
+		{
+			mLog.info( "LibUSB API Version: " + LibUsb.getApiVersion() );
+			mLog.info( "LibUSB Version: " + LibUsb.getVersion() );
 			
-			mLog.info( "inspecting usb device [" + counter + "] tuner class: " 
+			result = LibUsb.getDeviceList( null, deviceList );
-					+ device.getTunerClass().toString() );
 			
-			String status = sNOT_LOADED;
+			if( result < 0 )
-			String name = "Unknown";
+			{
-			String reason = "No device driver class available";
+				mLog.error( "unable to get device list from libusb [" + result + " / " + 
+							LibUsb.errorName( result ) + "]" );
+			}
+			else
+			{
+				mLog.info( "discovered [" + result + "] attached USB devices" );
+			}
+		}
+
+		for( Device device: deviceList )
+		{
+			DeviceDescriptor descriptor = new DeviceDescriptor();
 			
-			TunerClass tunerClass = device.getTunerClass();
+			result = LibUsb.getDeviceDescriptor( device, descriptor );
+			
+			if( result != LibUsb.SUCCESS )
+			{
+				mLog.error( "unable to read device descriptor [" + 
+							LibUsb.errorName( result ) + "]" );
+			}
+			else
+			{
+				TunerInitStatus status = initTuner( device, descriptor );
+
+				StringBuilder sb = new StringBuilder();
+
+				sb.append( "usb device [" );
+				sb.append( String.format( "%04X", descriptor.idVendor() ) );
+				sb.append( ":" );
+				sb.append( String.format( "%04X", descriptor.idProduct() ) );
+
+				if( status.isLoaded() )
+				{
+					Tuner tuner = status.getTuner();
+					sb.append( "] LOADED: "  );
+					sb.append( tuner.toString() );
+					mTuners.add( tuner );
+				}
+				else
+				{
+					sb.append( "] NOT LOADED: " );
+					sb.append( status.getInfo() );
+				}
+
+				mLog.info( sb.toString() );
+			}
+		}
+		
+		LibUsb.freeDeviceList( deviceList, true );
+	}
+	
+	private TunerInitStatus initTuner( Device device, 
+									   DeviceDescriptor descriptor )
+	{
+		if( device != null && descriptor != null )
+		{
+			TunerClass tunerClass = TunerClass.valueOf( descriptor.idVendor(), 
+					descriptor.idProduct() );
 			
 			switch( tunerClass )
 			{
+				case ETTUS_USRP_B100:
+					return initEttusB100Tuner( device, descriptor );
 				case FUNCUBE_DONGLE_PRO:
-					//Locate the matching mixer tuner dataline
+					return initFuncubeProTuner( device, descriptor );
-					MixerTunerDataLine fcd1Dataline = 
-						getMixerTunerDataLine( tunerClass.getTunerType() );
-					if( fcd1Dataline != null )
-					{
-						FCD1TunerController fcd1Controller;
-
-						try
-                        {
-	                        fcd1Controller = new FCD1TunerController( device );
-
-							FCDTuner fcd1Tuner = 
-									new FCDTuner( fcd1Dataline, fcd1Controller );
-							
-	                        TunerConfiguration config = 
-	                        		getTunerConfiguration( fcd1Tuner );
-
-							if( config != null )
-	    	                {
-								fcd1Tuner.apply( config );
-	    	                }					
-
-							mTuners.add( fcd1Tuner );
-
-							name = fcd1Tuner.getName();
-							status = sLOADED;
-							reason = null;
-                        }
-                        catch ( SourceException e )
-                        {
-                        	reason = "Controller Source Exception: " + 
-                        					e.getLocalizedMessage();
-                        }
-						
-					}
-					else
-					{
-						reason = "Couldn't locate matching mixer/sound card device";
-					}
-					break;
 				case FUNCUBE_DONGLE_PRO_PLUS:
-					//Locate the matching mixer tuner dataline
+					return initFuncubeProPlusTuner( device, descriptor );
-					MixerTunerDataLine fcd2Dataline = 
+				case HACKRF_ONE:
-								getMixerTunerDataLine( tunerClass.getTunerType() );
+					return initHackRFTuner( device, descriptor );
-
-					if( fcd2Dataline != null )
-					{
-						FCD2TunerController fcd2Controller;
-
-						try
-                        {
-	                        fcd2Controller = new FCD2TunerController( device );
-
-							FCDTuner fcd2Tuner = 
-								new FCDTuner( fcd2Dataline, fcd2Controller );
-
-	                        TunerConfiguration config = 
-	                        		getTunerConfiguration( fcd2Tuner );
-
-							if( config != null )
-	    	                {
-								fcd2Tuner.apply( config );
-	    	                }					
-
-							mTuners.add( fcd2Tuner );
-
-							status = sLOADED;
-							name = fcd2Tuner.getName();
-							reason = null;
-                        }
-                        catch ( SourceException e )
-                        {
-                        	reason = "Controller Source Exception: " + 
-                        					e.getLocalizedMessage();
-                        }
-					}
-					else
-					{
-						reason = "Couldn't locate matching mixer/sound card device";
-					}
-					break;
-				case GENERIC_2832:
 				case COMPRO_VIDEOMATE_U620F:
 				case COMPRO_VIDEOMATE_U650F:
 				case COMPRO_VIDEOMATE_U680F:
+				case GENERIC_2832:
+				case GENERIC_2838:
 				case DEXATEK_5217_DVBT:
 				case DEXATEK_DIGIVOX_MINI_II_REV3:
 				case DEXATEK_LOGILINK_VG002A:
-				case GENERIC_2838:
 				case GIGABYTE_GTU7300:
 				case GTEK_T803:
 				case LIFEVIEW_LV5T_DELUXE:
@@ -259,254 +239,333 @@ public class TunerManager
 				case TERRATEC_T_STICK_PLUS:
 				case TWINTECH_UT40:
 				case ZAAPA_ZTMINDVBZP:
-					TunerType tunerType = tunerClass.getTunerType();
+					return initRTL2832Tuner( tunerClass, device, descriptor );
-					
-					if( tunerType == TunerType.RTL2832_VARIOUS )
-					{
-						tunerType = RTL2832TunerController.identifyTunerType( device );
-					}
-					
-					mLog.debug( "identified tuner class [" + 
-							tunerClass.toString() + "] with tuner type [" + 
-							tunerType.toString() + "]" );
-					
-					switch( tunerType )
-					{
-						case ELONICS_E4000:
-							try
-							{
-								E4KTunerController controller = 
-									new E4KTunerController( device );
-								
-								controller.init();
-								
-								RTL2832Tuner rtlTuner = 
-									new RTL2832Tuner( tunerClass, controller );
-								
-		                        TunerConfiguration config = 
-		                        		getTunerConfiguration( rtlTuner );
-
-								if( config != null )
-		    	                {
-									rtlTuner.apply( config );
-		    	                }					
-								
-								mTuners.add( rtlTuner );
-								status = sLOADED;
-								name = rtlTuner.getName();
-								reason = null;
-							}
-							catch( SourceException se )
-							{
-								status = sNOT_LOADED;
-								reason = "Error constructing E4K tuner "
-									+ "controller - " + se.getLocalizedMessage();
-							}
-							break;
-						case RAFAELMICRO_R820T:
-							mLog.debug( "attempting to construct R820T "
-									+ "tuner controller" );
-							try
-							{
-								R820TTunerController controller = 
-									new R820TTunerController( device );
-								
-								mLog.debug( "initializing R820T tuner controller" );
-								controller.init();
-								
-								RTL2832Tuner rtlTuner = 
-									new RTL2832Tuner( tunerClass, controller );
-								
-								
-		                        TunerConfiguration config = 
-		                        		getTunerConfiguration( rtlTuner );
-
-								if( config != null )
-		    	                {
-									mLog.debug( "applying tuner config to R820T tuner" );
-									rtlTuner.apply( config );
-		    	                }					
-								else
-								{
-									mLog.debug( "R820T tuner config was "
-											+ "null - not applied" );
-								}
-								
-								mTuners.add( rtlTuner );
-								status = sLOADED;
-								name = rtlTuner.getName();
-								reason = null;
-							}
-							catch( SourceException se )
-							{
-								status = sNOT_LOADED;
-								reason = "Error constructing R820T tuner "
-									+ "controller - " + se.getLocalizedMessage();
-								
-								mLog.error( "error constructing tuner", se );
-							}
-							break;
-						case FITIPOWER_FC0012:
-						case FITIPOWER_FC0013:
-						case RAFAELMICRO_R828D:
-						case UNKNOWN:
-						default:
-							status = sNOT_LOADED;
-							reason = "SDRTRunk doesn't currently support RTL2832 "
-								+ "Dongle with [" + tunerType.toString() + 
-								"] tuner for tuner class[" + tunerClass.toString() + "]";
-							break;
-					}
-					break;
-				case ETTUS_USRP_B100:
-					mTuners.add(  new B100Tuner( device ) );
-					status = sLOADED;
-					reason = null;
-					break;
-				case HACKRF_ONE:
-//					try
-//                    {
-//						HackRFTunerController hackRFController = 
-//									new HackRFTunerController( device );
-//						
-//						hackRFController.init();
-//						
-//						HackRFTuner hackRFTuner = 
-//								new HackRFTuner( hackRFController );
-//						
-//	                    mTuners.add( hackRFTuner );
-//						name = hackRFTuner.getName();
-//						status = sLOADED;
-//						reason = null;
-//                    }
-//					catch( SourceException se )
-//					{
-//						status = sNOT_LOADED;
-//						reason = "Error constructing HackRF tuner "
-//							+ "controller - " + se.getLocalizedMessage();
-//					}
-					break;
 				case UNKNOWN:
 				default:
 					break;
 			}
-
-			/**
-			 * Log the tuner loading status
-			 */
-			sb.append( status );
-			sb.append( String.format( "%04X", 
-					device.getDevice().getUsbDeviceDescriptor().idVendor() ) );
-			sb.append( ":" );
-			sb.append( String.format( "%04X", 
-					device.getDevice().getUsbDeviceDescriptor().idProduct() ) );
-			sb.append( " " );
-
-			sb.append( name );
-			
-			if( reason != null )
-			{
-				sb.append( " - " );
-				sb.append( reason );
-			}
-			
-			sb.append( "\n" );
 		}
 		
-		mLog.info( "Configuring USB Tuners" );
+		return new TunerInitStatus( null, "Unknown Device" );
-		mLog.info( sb.toString() );
 	}
 	
-	/**
+	private TunerInitStatus initEttusB100Tuner( Device device, 
-	 * Get all USB tuner devices
+												DeviceDescriptor descriptor )
-	 */
-	private ArrayList<USBTunerDevice> getUSBTunerDevices()
 	{
-		StringBuilder sb = new StringBuilder();
+		return new TunerInitStatus( null, "Ettus B100 tuner not currently "
+				+ "supported" );
+//		case ETTUS_USRP_B100:
+//		mTuners.add(  new B100Tuner( device ) );
+//		status = sLOADED;
+//		reason = null;
+//		break;
+	}
+	
+	private TunerInitStatus initFuncubeProTuner( Device device, 
+												 DeviceDescriptor descriptor )
+	{
+		String reason = "NOT LOADED";
 		
-		List<UsbDevice> devices = getUSBDevices();
+		MixerTunerDataLine dataline = getMixerTunerDataLine( 
+							TunerClass.FUNCUBE_DONGLE_PRO.getTunerType() );
+		
+		if( dataline != null )
+		{
+			FCD1TunerController controller = 
+						new FCD1TunerController( device, descriptor );
 
-		sb.append( "discovered [" + devices.size() + 
+			try
-					"] attached USB devices\n" );
-	    
-		ArrayList<USBTunerDevice> tuners = new ArrayList<USBTunerDevice>();
-
-        for (UsbDevice device : devices )
-        {
-        	String status = "\t[NOT RECOGNIZED]\t";
-        	
-            TunerClass type = TunerClass.valueOf( device.getUsbDeviceDescriptor() );
-
-            if( type != TunerClass.UNKNOWN )
             {
-            	status = "\t[RECOGNIZED]    \t";
+	            controller.init();
-                tuners.add( new USBTunerDevice( device, type) );
+	            
+				FCDTuner tuner = 
+						new FCDTuner( dataline, controller );
+
+	            TunerConfiguration config = getTunerConfiguration( tuner );
+
+				if( config != null )
+	            {
+					tuner.apply( config );
+	            }					
+
+				return new TunerInitStatus( tuner, "LOADED" );
             }
-           
+            catch ( SourceException e )
-            sb.append( status );
-            sb.append( device.toString() );
-            
-            if( type != TunerClass.UNKNOWN )
             {
-            	sb.append( " " );
+            	mLog.error( "couldn't load funcube dongle pro tuner", e );
-            	sb.append( type.getVendorDescription() );
+            	
-            	sb.append( " " );
+            	reason = "error during initialization - " + e.getLocalizedMessage();
-            	sb.append( type.getDeviceDescription() );
             }
+		}
+		else
+		{
+			reason = "couldn't find matching mixer dataline";
+		}
 
-            sb.append( "\n" );
+		return new TunerInitStatus( null, "Funcube Dongle Pro tuner not "
-        }
+				+ "loaded - " + reason  );
-        
-        mLog.info( "USB Device Discovery" );
-        mLog.info( sb.toString() );
-
-        return tuners;
 	}
 
-	/**
+	private TunerInitStatus initFuncubeProPlusTuner( Device device, 
-	 * Gets all USB devices from the root hub downward, recursively, or 
+													 DeviceDescriptor descriptor )
-	 * returns empty list if none are discovered
+	{
-	 */
+		String reason = "NOT LOADED";
-    public static List<UsbDevice> getUSBDevices()
+		
-    {
+		MixerTunerDataLine dataline = getMixerTunerDataLine( 
-        ArrayList<UsbDevice> devices = new ArrayList<UsbDevice>();
+					TunerClass.FUNCUBE_DONGLE_PRO_PLUS.getTunerType() );
-        
+		
-        try
+		if( dataline != null )
-        {
+		{
-            UsbServices services = UsbHostManager.getUsbServices();
+			FCD2TunerController controller = 
-            devices = getUsbChildDevices( services.getRootUsbHub() );
+						new FCD2TunerController( device, descriptor );
-        }
-        catch( SecurityException e )
-        {
-        	mLog.error( "security exception while getting USB devices", e );
-        }
-        catch( UsbException e )
-        {
-        	mLog.error( "usb exception while getting USB devices", e );
-        }
 
-        return devices;
+			try
-    }
-    
-    /**
-     * Get (recursively) all usb child devices below the usb hub
-     */
-    public static ArrayList<UsbDevice> getUsbChildDevices( UsbHub hub )
-    {
-        ArrayList<UsbDevice> devices = new ArrayList<UsbDevice>();
-
-        for ( UsbDevice device : (List<UsbDevice>) hub.getAttachedUsbDevices() )
-        {
-            devices.add( device );
-            
-            if ( device.isUsbHub() )
             {
-                devices.addAll( getUsbChildDevices( (UsbHub)device ) );
+	            controller.init();
+	            
+				FCDTuner tuner = 
+						new FCDTuner( dataline, controller );
+
+	            TunerConfiguration config = getTunerConfiguration( tuner );
+
+				if( config != null )
+	            {
+					tuner.apply( config );
+	            }				
+
+				return new TunerInitStatus( tuner, "LOADED" );
             }
-        }
+            catch ( SourceException e )
-        
+            {
-        return devices;
+            	mLog.error( "couldn't load funcube dongle pro plus tuner", e );
-    }
+            	
+            	reason = "error during initialization - " + 
+            						e.getLocalizedMessage();
+            }
+		}
+		else
+		{
+			reason = "couldn't find matching mixer dataline";
+		}
+
+		return new TunerInitStatus( null, "Funcube Dongle Pro tuner not "
+				+ "loaded - " + reason );
+	}
+
+	private TunerInitStatus initHackRFTuner( Device device, 
+											 DeviceDescriptor descriptor )
+	{
+		try
+	    {
+			HackRFTunerController hackRFController = 
+						new HackRFTunerController( device, descriptor );
+			
+			hackRFController.init();
+			
+			HackRFTuner tuner = new HackRFTuner( hackRFController );
+			
+	        return new TunerInitStatus( tuner, "LOADED" );
+	    }
+		catch( SourceException se )
+		{
+			mLog.error( "couldn't construct HackRF controller/tuner", se );
+			
+			return new TunerInitStatus( null, 
+					"error constructing HackRF tuner controller" );
+		}
+	}
+
+	private TunerInitStatus initRTL2832Tuner( TunerClass tunerClass,
+											  Device device, 
+											  DeviceDescriptor deviceDescriptor )
+	{
+		String reason = "NOT LOADED";
+
+		TunerType tunerType = tunerClass.getTunerType();
+			
+		if( tunerType == TunerType.RTL2832_VARIOUS )
+		{
+			try
+			{
+				tunerType = RTL2832TunerController.identifyTunerType( device );
+			}
+			catch( SourceException e )
+			{
+				mLog.error( "couldn't determine RTL2832 tuner type", e );
+				tunerType = TunerType.UNKNOWN;
+			}
+		}
+			
+		switch( tunerType )
+		{
+			case ELONICS_E4000:
+				try
+				{
+					E4KTunerController controller = 
+						new E4KTunerController( device, deviceDescriptor );
+					
+					controller.init();
+					
+					RTL2832Tuner rtlTuner = 
+						new RTL2832Tuner( tunerClass, controller );
+					
+                    TunerConfiguration config = 
+                    		getTunerConfiguration( rtlTuner );
+
+					if( config != null )
+	                {
+						rtlTuner.apply( config );
+	                }					
+
+					return new TunerInitStatus( rtlTuner, "LOADED" );
+				}
+				catch( SourceException se )
+				{
+					return new TunerInitStatus( null, "Error constructing E4K tuner "
+						+ "controller - " + se.getLocalizedMessage() );
+				}
+			case RAFAELMICRO_R820T:
+				mLog.debug( "attempting to construct R820T "
+						+ "tuner controller" );
+				try
+				{
+					R820TTunerController controller = 
+						new R820TTunerController( device, deviceDescriptor );
+					
+					mLog.debug( "initializing R820T tuner controller" );
+					controller.init();
+					
+					RTL2832Tuner rtlTuner = 
+						new RTL2832Tuner( tunerClass, controller );
+					
+                    TunerConfiguration config = 
+                    		getTunerConfiguration( rtlTuner );
+
+					if( config != null )
+	                {
+						mLog.debug( "applying tuner config to R820T tuner" );
+						rtlTuner.apply( config );
+	                }					
+					else
+					{
+						mLog.debug( "R820T tuner config was "
+								+ "null - not applied" );
+					}
+					
+					return new TunerInitStatus( rtlTuner, "LOADED" );
+				}
+				catch( SourceException se )
+				{
+					mLog.error( "error constructing tuner", se );
+					
+					return new TunerInitStatus( null, "Error constructing R820T "
+						+ "tuner controller - " + se.getLocalizedMessage() );
+				}
+			case FITIPOWER_FC0012:
+			case FITIPOWER_FC0013:
+			case RAFAELMICRO_R828D:
+			case UNKNOWN:
+			default:
+				reason = "SDRTRunk doesn't currently support RTL2832 "
+					+ "Dongle with [" + tunerType.toString() + 
+					"] tuner for tuner class[" + tunerClass.toString() + "]";
+				break;
+		}
+		
+		return new TunerInitStatus( null, reason );
+	}
+	
+	
+//	/**
+//	 * Get all USB tuner devices
+//	 */
+//	private ArrayList<USBTunerDevice> getUSBTunerDevices()
+//	{
+//		StringBuilder sb = new StringBuilder();
+//		
+//		List<UsbDevice> devices = getUSBDevices();
+//
+//		sb.append( "discovered [" + devices.size() + 
+//					"] attached USB devices\n" );
+//	    
+//		ArrayList<USBTunerDevice> tuners = new ArrayList<USBTunerDevice>();
+//
+//        for (UsbDevice device : devices )
+//        {
+//        	String status = "\t[NOT RECOGNIZED]\t";
+//        	
+//            TunerClass type = TunerClass.valueOf( device.getUsbDeviceDescriptor() );
+//
+//            if( type != TunerClass.UNKNOWN )
+//            {
+//            	status = "\t[RECOGNIZED]    \t";
+//                tuners.add( new USBTunerDevice( device, type) );
+//            }
+//           
+//            sb.append( status );
+//            sb.append( device.toString() );
+//            
+//            if( type != TunerClass.UNKNOWN )
+//            {
+//            	sb.append( " " );
+//            	sb.append( type.getVendorDescription() );
+//            	sb.append( " " );
+//            	sb.append( type.getDeviceDescription() );
+//            }
+//
+//            sb.append( "\n" );
+//        }
+//        
+//        mLog.info( "USB Device Discovery" );
+//        mLog.info( sb.toString() );
+//
+//        return tuners;
+//	}
+//
+//	/**
+//	 * Gets all USB devices from the root hub downward, recursively, or 
+//	 * returns empty list if none are discovered
+//	 */
+//    public static List<UsbDevice> getUSBDevices()
+//    {
+//        ArrayList<UsbDevice> devices = new ArrayList<UsbDevice>();
+//        
+//        try
+//        {
+//            UsbServices services = UsbHostManager.getUsbServices();
+//            devices = getUsbChildDevices( services.getRootUsbHub() );
+//        }
+//        catch( SecurityException e )
+//        {
+//        	mLog.error( "security exception while getting USB devices", e );
+//        }
+//        catch( UsbException e )
+//        {
+//        	mLog.error( "usb exception while getting USB devices", e );
+//        }
+//
+//        return devices;
+//    }
+//    
+//    /**
+//     * Get (recursively) all usb child devices below the usb hub
+//     */
+//    public static ArrayList<UsbDevice> getUsbChildDevices( UsbHub hub )
+//    {
+//        ArrayList<UsbDevice> devices = new ArrayList<UsbDevice>();
+//
+//        for ( UsbDevice device : (List<UsbDevice>) hub.getAttachedUsbDevices() )
+//        {
+//            devices.add( device );
+//            
+//            if ( device.isUsbHub() )
+//            {
+//                devices.addAll( getUsbChildDevices( (UsbHub)device ) );
+//            }
+//        }
+//        
+//        return devices;
+//    }
 
     /**
      * Get a stored tuner configuration or create a default tuner configuration
@@ -585,4 +644,31 @@ public class TunerManager
     	
     	return null;
     }
+    
+    public class TunerInitStatus
+    {
+    	private Tuner mTuner;
+    	private String mInfo;
+    	
+    	public TunerInitStatus( Tuner tuner, String info )
+    	{
+    		mTuner = tuner;
+    		mInfo = info;
+    	}
+    	
+    	public Tuner getTuner()
+    	{
+    		return mTuner;
+    	}
+    	
+    	public String getInfo()
+    	{
+    		return mInfo;
+    	}
+    	
+    	public boolean isLoaded()
+    	{
+    		return mTuner != null;
+    	}
+    }
 }

src/source/tuner/ettus/B100Tuner.java

@@ -51,6 +51,11 @@ public class B100Tuner extends Tuner
 		mDevice = device;
 	}
 	
+	public void dispose()
+	{
+		
+	}
+	
 	@Override
     public TunerClass getTunerClass()
     {

src/source/tuner/fcd/FCDTuner.java

@@ -50,6 +50,13 @@ public class FCDTuner extends MixerTuner
 		mController.addListener( (FrequencyChangeListener)this );
 	}
 	
+	public void dispose()
+	{
+		//TODO: release the mixer tuner data line as well
+		
+		mController.dispose();
+	}
+	
 	public FCDTunerController getController()
 	{
 		return mController;
@@ -70,7 +77,7 @@ public class FCDTuner extends MixerTuner
 	@Override
     public String getUniqueID()
     {
-	    return mController.getAddress();
+	    return mController.getUSBAddress();
     }
 
 	@Override

src/source/tuner/fcd/FCDTunerController.java

@@ -17,18 +17,21 @@
  ******************************************************************************/
 package source.tuner.fcd;
 
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.IntBuffer;
+
 import javax.swing.JPanel;
 import javax.usb.UsbClaimException;
-import javax.usb.UsbConfiguration;
-import javax.usb.UsbDevice;
-import javax.usb.UsbEndpoint;
 import javax.usb.UsbException;
-import javax.usb.UsbInterface;
-import javax.usb.UsbInterfacePolicy;
-import javax.usb.UsbPipe;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.Device;
+import org.usb4java.DeviceDescriptor;
+import org.usb4java.DeviceHandle;
+import org.usb4java.LibUsb;
+import org.usb4java.LibUsbException;
 
 import source.SourceException;
 import source.tuner.TunerClass;
@@ -36,7 +39,6 @@ import source.tuner.TunerConfiguration;
 import source.tuner.TunerController;
 import source.tuner.TunerType;
 import source.tuner.fcd.proV1.FCD1TunerController.Block;
-import source.tuner.usb.USBTunerDevice;
 import controller.ResourceManager;
 
 public abstract class FCDTunerController extends TunerController
@@ -44,57 +46,105 @@ public abstract class FCDTunerController extends TunerController
 	private final static Logger mLog = 
 			LoggerFactory.getLogger( FCDTunerController.class );
 
-	public final static int sINT_NULL_VALUE = -1;
+	public final static byte FCD_INTERFACE = (byte)0x2;
-	public final static long sLONG_NULL_VALUE = -1l;
+	public final static byte FCD_ENDPOINT_IN = (byte)0x82;
-	public final static double sDOUBLE_NULL_VALUE = -1.0D;
+	public final static byte FCD_ENDPOINT_OUT = (byte)0x2;
 	
-	public final static byte sFCD_INTERFACE = (byte)0x2;
+	private Device mDevice;
-	public final static byte sFCD_ENDPOINT_IN = (byte)0x82;
+	private DeviceDescriptor mDeviceDescriptor;
-	public final static byte sFCD_ENDPOINT_OUT = (byte)0x2;
+	private DeviceHandle mDeviceHandle;
 	
-	public final static boolean sFCD_FORCE_CLAIM_HID_INTERFACE = true;
-	
-	private UsbDevice mFuncube;
-	private UsbConfiguration mUsbConfiguration;
-	private UsbInterface mFuncubeHID;
-	private UsbPipe mPipeIn;
-	private UsbPipe mPipeOut;
 	private FCDConfiguration mConfiguration = new FCDConfiguration();
-
+	
-	public FCDTunerController( USBTunerDevice device, 
+	/**
+	 * Generic FCD tuner controller - contains functionality common across both
+	 * funcube dongle tuners 
+	 * 
+	 * @param device
+	 * @param descriptor
+	 * @param minTunableFrequency
+	 * @param maxTunableFrequency
+	 */
+	public FCDTunerController( Device device, 
+							   DeviceDescriptor descriptor,
 							   int minTunableFrequency,
-							   int maxTunableFrequency ) throws SourceException
+							   int maxTunableFrequency )
 	{
 		super( minTunableFrequency, maxTunableFrequency );
 
-		mFuncube = device.getDevice();
+		mDevice = device;
-		mUsbConfiguration = mFuncube.getActiveUsbConfiguration();
+		mDeviceDescriptor = descriptor;
-		mFuncubeHID = mUsbConfiguration.getUsbInterface( sFCD_INTERFACE );
 	}
-	
+
+	/**
+	 * Initializes the controller by opening the USB device and claiming the
+	 * HID interface.
+	 * 
+	 * Invoke this method after constructing this class to setup the
+	 * controller.
+	 * 
+	 * @throws SourceException if cannot open and claim the USB device
+	 */
+	public void init() throws SourceException
+	{
+		mDeviceHandle = new DeviceHandle();
+		
+		int result = LibUsb.open( mDevice, mDeviceHandle );
+
+		if( result != LibUsb.SUCCESS )
+		{
+			mDeviceHandle = null;
+			
+			throw new SourceException( "libusb couldn't open funcube usb "
+					+ "device [" + LibUsb.errorName( result ) + "]" );
+		}
+		
+		claimInterface();
+	}
+
+	/**
+	 * Disposes of resources.  Closes the USB device and interface.
+	 */
+	public void dispose()
+	{
+		if( mDeviceHandle != null )
+		{
+			try
+			{
+				LibUsb.close( mDeviceHandle );
+			}
+			catch( Exception e )
+			{
+				mLog.error( "error while closing device handle", e );
+			}
+			
+			mDeviceHandle = null;
+		}
+		
+		mDeviceDescriptor = null;
+		mDevice = null;
+	}
+
+	/**
+	 * Sample rate of the tuner
+	 */
 	public abstract int getCurrentSampleRate() throws SourceException;
 	
 	/**
-	 * Returns the tuner class.  Since this is a generic container for both
+	 * Tuner class
-	 * types of funcube, we let the controller self identify the class and type
-	 * 
-	 * @return - tuner class
 	 */
 	public abstract TunerClass getTunerClass();
 
 	/**
-	 * Returns the tuner type.  Since this is a generic container for both
+	 * Tuner type
-	 * types of funcube, we let the controller self identify the class and type
-	 * 
-	 * @return - tuner type
 	 */
 	public abstract TunerType getTunerType();
 
 	/**
-	 * FCD editor panel
+	 * Editor panel (GUI) component.
 	 */
 	public abstract JPanel getEditor( FCDTuner tuner, 
-				ResourceManager resourceManager );
+								ResourceManager resourceManager );
 
 	/**
 	 * Applies the settings in the tuner configuration
@@ -103,17 +153,81 @@ public abstract class FCDTunerController extends TunerController
 						throws SourceException;
 
 	/**
-	 * Returns the applied tuner configuration or null if one hasn't yet been
+	 * Returns the currently applied tuner configuration or null if one hasn't 
-	 * applied
+	 * yet been applied
 	 */
 	public abstract TunerConfiguration getTunerConfiguration();
 
 	/**
-	 * USB address
+	 * USB address (bus/port)
 	 */
-	public String getAddress()
+	public String getUSBAddress()
 	{
-	    return mFuncube.toString();
+		if( mDevice != null )
+		{
+			StringBuilder sb = new StringBuilder();
+			
+			sb.append( "Bus:" );
+			int bus = LibUsb.getBusNumber( mDevice );
+			sb.append( bus );
+			
+			sb.append( " Port:" );
+			int port = LibUsb.getPortNumber( mDevice );
+			sb.append( port );
+			
+			return sb.toString();
+		}
+
+		return "UNKNOWN";
+	}
+
+	/**
+	 * USB Vendor and Product ID 
+	 */
+	public String getUSBID()
+	{
+		if( mDeviceDescriptor != null )
+		{
+			StringBuilder sb = new StringBuilder();
+			
+			sb.append( String.format( "%04X", 
+					(int)( mDeviceDescriptor.idVendor() & 0xFFFF ) ) );
+
+			sb.append( ":" );
+			
+			sb.append( String.format( "%04X", 
+					(int)( mDeviceDescriptor.idProduct() & 0xFFFF ) ) );
+
+			return sb.toString();
+		}
+
+		return "UNKNOWN";
+	}
+
+	/**
+	 * USB Port Speed.  Should be 2.0 for both types of funcube dongles
+	 */
+	public String getUSBSpeed()
+	{
+		if( mDevice != null )
+		{
+			int speed = LibUsb.getDeviceSpeed( mDevice );
+
+			switch( speed )
+			{
+				case 0:
+					return "1.1 LOW";
+				case 1:
+					return "1.1 FULL";
+				case 2:
+					return "2.0 HIGH";
+				case 3:
+					return "3.0 SUPER";
+				default:
+			}
+		}
+		
+		return "UNKNOWN";
 	}
 	
 	/**
@@ -121,20 +235,17 @@ public abstract class FCDTunerController extends TunerController
 	 */
 	public void setFCDMode( Mode mode ) throws UsbException, UsbClaimException
 	{
-		byte[] response = null;
+		ByteBuffer response = null;
 		
 		switch( mode )
 		{
 			case APPLICATION:
-				response = send( FCDCommand.BL_QUERY.getRequestTemplate(), 
+				response = send( FCDCommand.BL_QUERY );
-								 FCDCommand.BL_QUERY.getResponseTemplate() );
 				break;
 			case BOOTLOADER:
-				response = send( FCDCommand.APP_RESET.getRequestTemplate(), 
+				response = send( FCDCommand.APP_RESET );
-								 FCDCommand.APP_RESET.getResponseTemplate() );
 				break;
-			case ERROR:
+			default:
-			case UNKNOWN:
 				break;
 		}
 		
@@ -171,7 +282,11 @@ public abstract class FCDTunerController extends TunerController
 	{
 		try
 		{
-			return send( FCDCommand.APP_GET_FREQUENCY_HZ );
+			ByteBuffer buffer = send( FCDCommand.APP_GET_FREQUENCY_HZ );
+			
+			buffer.order( ByteOrder.LITTLE_ENDIAN );
+			
+			return (int)( buffer.getInt( 2 ) & 0xFFFFFFFF );
 		}
 		catch( Exception e )
 		{
@@ -189,185 +304,206 @@ public abstract class FCDTunerController extends TunerController
 	}
 
 	/**
-	 * Claims the FCD USB HID interface.  If another application currently has
+	 * Claims the USB interface.  Attempts to detach the active kernel driver if
-	 * the interface claimed, the sFCD_FORCE_CLAIM_HID_INTERFACE setting
+	 * one is currently attached.
-	 * will dictate if the interface is forcibly claimed from the other 
-	 * application
 	 */
-	private boolean claim() throws UsbException, UsbClaimException
+	private void claimInterface() throws SourceException
 	{
-		boolean claimed = false;
+		if( mDeviceHandle != null )
-		
-		if( !mFuncubeHID.isClaimed() )
 		{
-			mFuncubeHID.claim( new UsbInterfacePolicy() 
+			int result = LibUsb.kernelDriverActive( mDeviceHandle, FCD_INTERFACE );
-			{
-				@Override
-                public boolean forceClaim( UsbInterface arg0 )
-                {
-                    return sFCD_FORCE_CLAIM_HID_INTERFACE;
-                }
-			} );
 			
-			claimed = true;
+			if( result == 1 )
-		}
-		else
-		{
-			mLog.info( "Attempted to claim the Funcube HID interface, but "
-					+ "it's in use by another program" );
-		}
-		
-		return claimed;
-	}
-	
-	/**
-	 * Releases the claimed USB (FCD) interface
-	 */
-	private void release()
-	{
-		mPipeIn = null;
-		mPipeOut = null;
-		
-		try
-        {
-	        mFuncubeHID.release();
-        }
-        catch ( Exception e )
-        {
-        	mLog.error( "Exception thrown while releasing the funcube HID "
-        			+ "interface", e );
-        }
-	}
-
-	/**
-	 * Convenience wrapper for commands that don't take arguments 
-	 */
-	public long send( FCDCommand command ) throws UsbException, UsbClaimException
-	{
-		return send( command, sLONG_NULL_VALUE );
-	}
-
-	/**
-	 * Sends the command, optionally placing the argument value parsed into 
-	 * little endian bytes in the request array.  Returns any integer value that
-	 * part of the response, or sINT_NULL_VALUE (-1) if it fails.
-	 * 
-	 * Note: we use a long return value to avoid any issues with the MSB of a
-	 * 32-bit response value being misinterpreted as the integer sign bit.
-	 * 
-	 * @param command
-	 * @param commandArgument - command argument.  Use -1 for no-argument commands
-	 * @return - response long value, or -1 if fails
-	 * @throws UsbException
-	 * @throws UsbClaimException
-	 */
-	public long send( FCDCommand command, long commandArgument ) throws UsbException,
-															UsbClaimException
-	{
-		long retVal = sLONG_NULL_VALUE;
-		
-		byte[] request = command.getRequestTemplate();
-
-		if( commandArgument != sLONG_NULL_VALUE )
-		{
-			//Parse the value argument into the request byte indices, according to command length
-			for( int x = 1; x < command.getArrayLength(); x++ )
 			{
-				//Little endian
+				result = LibUsb.detachKernelDriver( mDeviceHandle, 
-				request[ x ] = (byte)( 0xFF & 
+						FCD_INTERFACE );
-						Long.rotateRight( commandArgument, ( x - 1 ) * 8 ) ); 
+
+				if( result != LibUsb.SUCCESS )
+				{
+					mLog.error( "failed attempt to detach kernel driver [" + 
+					LibUsb.errorName( result ) + "]" );
+				}
 			}
-		}
-
-		byte[] response = send( request, command.getResponseTemplate() );
-
-		if( response != null )
-		{
-			retVal = parseResponse( command, response );
-		}
-		
-		return retVal;
-	}
-	
-	/**
-	 * Sends the request byte array to the device and returns the response array 
-	 * filled with the response bytes from the device, or returns null if 
-	 * something failed along the way
-	 */
-	private byte[] send( byte[] request, byte[] response ) 
-			throws UsbException, UsbClaimException
-	{
-		byte[] retVal = null;
-		
-		if( mPipeIn != null && mPipeOut != null )
-		{
-			mPipeOut.syncSubmit( request );
-
-			mPipeIn.syncSubmit( response );
 			
-			retVal = response;
+			result = LibUsb.claimInterface( mDeviceHandle, FCD_INTERFACE );
-		}
+			
-		
+			if( result != LibUsb.SUCCESS )
-		return retVal;
-	}
-	
-	/**
-	 * Parses a multi-byte integer response value from a byte array that is
-	 * 2 or more bytes long
-	 */
-	private long parseResponse( FCDCommand command, byte[] response )
-	{
-		long retVal = 0;
-
-		//Parse the value argument into the request byte indices, according to command length
-		for( int x = 2; x < command.getArrayLength(); x++ )
-		{
-			retVal += Long.rotateLeft( ( response[ x ] & 0xFF ), ( x - 2 ) * 8 );
-		}
-
-		return retVal;
-	}
-	
-	protected void open() throws UsbException, UsbClaimException
-	{
-		if( claim() )
-		{
-			//Get the USB endpoints
-			UsbEndpoint endpointIn = 
-					mFuncubeHID.getUsbEndpoint( sFCD_ENDPOINT_IN );
-
-			UsbEndpoint endpointOut = 
-					mFuncubeHID.getUsbEndpoint( sFCD_ENDPOINT_OUT );
-
-			//Setup the pipes
-			if( endpointIn != null && endpointOut != null )
 			{
-				mPipeOut = endpointOut.getUsbPipe();
+				throw new SourceException( "couldn't claim usb interface [" + 
-				mPipeOut.open();
+					LibUsb.errorName( result ) + "]" );
-
-				mPipeIn = endpointIn.getUsbPipe();
-				mPipeIn.open();
-				
-				setFCDMode( Mode.APPLICATION );
-			}
-			else
-			{
-				mLog.error( "FCD Pro Tuner Controller - couldn't gain access " +
-						"to the USB in/out endpoints or pipes." );
 			}
 		}
 		else
 		{
-			mLog.error( "FCD Pro Tuner Controller - couldn't claim the USB " +
+			throw new SourceException( "couldn't claim usb hid interface - no "
-				"interface.  Check to see if another program is using it." );
+					+ "device handle" );
+		}
+	}
+
+	/**
+	 * Performs an interrupt write to the OUT endpoint.
+	 * @param buffer - direct allocated buffer.  Must be 64 bytes in length.
+	 * 
+	 * @throws LibUsbException on error
+	 */
+	private void write( ByteBuffer buffer ) throws LibUsbException
+	{
+		if( mDeviceHandle != null )
+		{
+			IntBuffer transferred = IntBuffer.allocate( 1 );
+			
+			int result = LibUsb.interruptTransfer( mDeviceHandle,
+												   FCD_ENDPOINT_OUT,
+												   buffer, 
+												   transferred,
+												   500l );
+			
+			if( result != LibUsb.SUCCESS )
+			{
+				throw new LibUsbException( "error writing byte buffer", 
+								result );
+			}
+			else if( transferred.get() != buffer.capacity() )
+			{
+				throw new LibUsbException( "transferred bytes [" + 
+						transferred.get( 0 ) + "] is not what was expected [" + 
+						buffer.capacity() + "]", result );
+			}
+		}
+		else
+		{
+			throw new LibUsbException( "device handle is null", 
+							LibUsb.ERROR_NO_DEVICE );
 		}
 	}
 	
-    protected void close()
+	/**
+	 * Performs an interrupt write to the OUT endpoint for the FCD command.
+	 * @param command - no-argument command to write
+	 * @throws LibUsbException - on error
+	 */
+	private void write( FCDCommand command ) throws LibUsbException
 	{
-		release();
+		ByteBuffer buffer = ByteBuffer.allocateDirect( 64 );
+
+		buffer.put( 0, command.getCommand() );
+		buffer.put( 1, (byte)0x00 );
+
+		write( buffer );
 	}
 
+	/**
+	 * Convenience logger for debugging read/write operations
+	 */
+	@SuppressWarnings( "unused" )
+    private void log( String label, ByteBuffer buffer )
+	{
+		StringBuilder sb = new StringBuilder();
+
+		sb.append( label );
+		
+		sb.append( " " );
+
+		sb.append( buffer.get( 0 ) );
+		sb.append( " | " );
+		
+		for( int x = 0; x < 64; x++ )
+		{
+			sb.append( String.format( "%02X", (int)( buffer.get( x ) & 0xFF ) ) );
+			sb.append( " " );
+		}
+		
+		mLog.debug( sb.toString() );
+	}
+	
+	/**
+	 * Performs an interrupt write to the OUT endpoint for the FCD command.
+	 * @param command - command to write
+	 * @param argument - value to write with the command
+	 * @throws LibUsbException - on error
+	 */
+	private void write( FCDCommand command, long argument ) throws LibUsbException
+	{
+		ByteBuffer buffer = ByteBuffer.allocateDirect( 64 );
+
+		/* The FCD expects little-endian formatted values */
+		buffer.order( ByteOrder.LITTLE_ENDIAN );
+
+		buffer.put( 0, command.getCommand() );
+		buffer.putLong( 1, argument );
+
+		write( buffer );
+	}
+	
+	/**
+	 * Performs an interrupt read against the endpoint
+	 * @return buffer read from FCD
+	 * @throws LibUsbException on error
+	 */
+	private ByteBuffer read() throws LibUsbException
+	{
+		if( mDeviceHandle != null )
+		{
+			ByteBuffer buffer = ByteBuffer.allocateDirect( 64 );
+
+			IntBuffer transferred = IntBuffer.allocate( 1 );
+			
+
+			int result = LibUsb.interruptTransfer( mDeviceHandle,
+												   FCD_ENDPOINT_IN,
+												   buffer, 
+												   transferred,
+												   500l );
+			
+			if( result != LibUsb.SUCCESS )
+			{
+				throw new LibUsbException( "error reading byte buffer", 
+								result );
+			}
+			else if( transferred.get( 0 ) != buffer.capacity() )
+			{
+				throw new LibUsbException( "received bytes [" + 
+						transferred.get( 0 ) + "] didn't match expected "
+						+ "length [" + buffer.capacity() + "]", result );
+			}
+
+			return buffer;
+		}
+		
+		throw new LibUsbException( "device handle is null", 
+				LibUsb.ERROR_NO_DEVICE );
+	}
+	
+	/**
+	 * Sends the FCD command and argument.  Performs a read to complete the
+	 * command.
+	 * 
+	 * @param command - command to send
+	 * @param argument - command argument to send
+	 * @throws LibUsbException - on error
+	 */
+	protected void send( FCDCommand command, long argument ) throws LibUsbException
+	{
+		write( command, argument );
+		read();
+	}
+		
+	/**
+	 * Sends the no-argument FCD command.  Performs a read to complete the
+	 * command.
+	 * 
+	 * @param command - command to send
+	 * @throws LibUsbException - on error
+	 */
+	protected ByteBuffer send( FCDCommand command ) throws LibUsbException
+	{
+		write( command );
+		return read();
+	}
+
+	/**
+	 * FCD configuration string parsing  class
+	 */
 	public class FCDConfiguration
 	{
 		private String mConfig;
@@ -385,11 +521,20 @@ public abstract class FCDTunerController extends TunerController
 			mMode = Mode.UNKNOWN;
 		}
 		
-		public void set( byte[] data )
+		/**
+		 * Extracts the configuration string from the buffer
+		 */
+		public void set( ByteBuffer buffer )
 		{
-			if( FCDCommand.checkResponse( FCDCommand.BL_QUERY, data ) || 
+			if( buffer.capacity() == 64 )
-					FCDCommand.checkResponse( FCDCommand.APP_RESET, data ) )
 			{
+				byte[] data = new byte[ 64 ];
+				
+				for( int x = 0; x < 64; x++ )
+				{
+					data[ x ] = buffer.get( x );
+				}
+
 				mConfig = new String( data );
 				mMode = Mode.getMode( mConfig );
 			}

src/source/tuner/fcd/FCDTunerDetailsPanel.java

@@ -17,26 +17,27 @@
  ******************************************************************************/
 package source.tuner.fcd;
 
-import javax.swing.BorderFactory;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 
-import source.tuner.rtl.RTL2832TunerController.Descriptor;
 import net.miginfocom.swing.MigLayout;
 
 public class FCDTunerDetailsPanel extends JPanel
 {
     private static final long serialVersionUID = 1L;
-    private JLabel mAddress;
-    private JLabel mCellBlock;
-    private JLabel mFirmware;
 
     public FCDTunerDetailsPanel( FCDTunerController controller )
     {
-		setLayout( new MigLayout( "fill,wrap 2", "[right][left]", "[][][][grow]" ) );
+		setLayout( new MigLayout( "fill,wrap 2", "[right][left]", "[][][][][][grow]" ) );
 
+		add( new JLabel( "USB ID:" ) );
+		add( new JLabel( controller.getUSBID() ) );
+        
 		add( new JLabel( "USB Address:" ) );
-		add( new JLabel( controller.getAddress() ) );
+		add( new JLabel( controller.getUSBAddress() ) );
+        
+		add( new JLabel( "USB Speed:" ) );
+		add( new JLabel( controller.getUSBSpeed() ) );
         
 		add( new JLabel( "Cellular Band:" ) );
 		add( new JLabel( controller.getConfiguration().getBandBlocking()

src/source/tuner/fcd/proV1/FCD1TunerConfigurationPanel.java

@@ -511,7 +511,7 @@ public class FCD1TunerConfigurationPanel extends JPanel
 	        mResourceManager.getSettingsManager()
 	        	.setSelectedTunerConfiguration( 
 	        			TunerType.FUNCUBE_DONGLE_PRO, 
-	        			mController.getAddress(), config );
+	        			mController.getUSBAddress(), config );
         }
         catch ( SourceException e1 )
         {

src/source/tuner/fcd/proV1/FCD1TunerController.java

@@ -17,12 +17,17 @@
  ******************************************************************************/
 package source.tuner.fcd.proV1;
 
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
 import javax.swing.JPanel;
 import javax.usb.UsbClaimException;
 import javax.usb.UsbException;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.Device;
+import org.usb4java.DeviceDescriptor;
 
 import source.SourceException;
 import source.tuner.TunerClass;
@@ -31,7 +36,6 @@ import source.tuner.TunerType;
 import source.tuner.fcd.FCDCommand;
 import source.tuner.fcd.FCDTuner;
 import source.tuner.fcd.FCDTunerController;
-import source.tuner.usb.USBTunerDevice;
 import controller.ResourceManager;
 
 public class FCD1TunerController extends FCDTunerController
@@ -53,19 +57,22 @@ public class FCD1TunerController extends FCDTunerController
 	private FCD1TunerConfiguration mTunerConfiguration;
 	private FCD1TunerEditorPanel mEditor;
 
-	public FCD1TunerController( USBTunerDevice device ) 
+	public FCD1TunerController( Device device, DeviceDescriptor descriptor ) 
-			throws SourceException 
 	{
-		super( device,
+		super( device, 
+			   descriptor, 
 			   sMINIMUM_TUNABLE_FREQUENCY, 
 			   sMAXIMUM_TUNABLE_FREQUENCY );
+	}
+	
+	public void init() throws SourceException
+	{
+		super.init();
 		
 		mFrequencyController.setSampleRate( sSAMPLE_RATE );
 		
 		try
 		{
-			open();
-			
 			setFCDMode( Mode.APPLICATION );
 			getPhaseAndGainCorrection();
 			getDCIQCorrection();
@@ -73,7 +80,7 @@ public class FCD1TunerController extends FCDTunerController
 			getLNAEnhanceSetting();
 			getMixerGainSetting();
 			
-			send( FCDCommand.APP_SET_MIXER_GAIN, 1 );
+			send( FCDCommand.APP_SET_MIXER_GAIN, 1l );
 		}
 		catch( Exception e )
 		{
@@ -156,10 +163,12 @@ public class FCD1TunerController extends FCDTunerController
 	 */
 	private void getLNAGainSetting() throws UsbClaimException, UsbException
 	{
-		int gain = (int)send( FCDCommand.APP_GET_LNA_GAIN );
+		ByteBuffer buffer = send( FCDCommand.APP_GET_LNA_GAIN );
-
-		mLog.info( "FCD1: lna gain setting is:" + gain );
 		
+		buffer.order( ByteOrder.LITTLE_ENDIAN );
+		
+		int gain = buffer.getInt( 2 );
+
 		mLNAGain = LNAGain.valueOf( gain );
 	}
 	
@@ -286,7 +295,11 @@ public class FCD1TunerController extends FCDTunerController
 	private void getPhaseAndGainCorrection() throws UsbClaimException,
 													UsbException
 	{
-		long correction = send( FCDCommand.APP_GET_IQ_CORRECTION );
+		ByteBuffer buffer = send( FCDCommand.APP_GET_IQ_CORRECTION );
+		
+		buffer.order( ByteOrder.LITTLE_ENDIAN );
+		
+		int correction = buffer.getInt( 2 );
 		
 		/**
 		 * Gain: mask the upper 16 phase bits and right shift to get the 
@@ -305,8 +318,6 @@ public class FCD1TunerController extends FCDTunerController
 		short phase = (short)( correction & 0x0000FFFF );
 		
 		mPhaseCorrection = ( (double)phase / (double)Short.MAX_VALUE );
-		
-		mLog.info( "FCD1: correction:" + correction + " gain:" + gain + " phase:" + phase );
 	}
 	
 	/**
@@ -413,7 +424,11 @@ public class FCD1TunerController extends FCDTunerController
 	private void getDCIQCorrection() throws UsbClaimException,
 													UsbException
 	{
-		long correction = send( FCDCommand.APP_GET_DC_CORRECTION );
+		ByteBuffer buffer = send( FCDCommand.APP_GET_DC_CORRECTION );
+		
+		buffer.order( ByteOrder.LITTLE_ENDIAN );
+		
+		int correction = buffer.getInt( 2 );
 
 		/**
 		 * Quadrature: mask the upper 16 bits and divide by 32768 to get the
@@ -443,9 +458,11 @@ public class FCD1TunerController extends FCDTunerController
 	
 	private void getLNAEnhanceSetting() throws UsbClaimException, UsbException
 	{
-		int enhance = (int)send( FCDCommand.APP_GET_LNA_ENHANCE );
+		ByteBuffer buffer = send( FCDCommand.APP_GET_LNA_ENHANCE );
-
+		
-		mLog.info( "FCD1: lna enhance setting is: " + enhance );
+		buffer.order( ByteOrder.LITTLE_ENDIAN );
+		
+		int enhance = buffer.getInt( 2 );
 
 		mLNAEnhance = LNAEnhance.valueOf( enhance );
 	}
@@ -463,9 +480,11 @@ public class FCD1TunerController extends FCDTunerController
 	
 	private void getMixerGainSetting() throws UsbClaimException, UsbException
 	{
-		int gain = (int)send( FCDCommand.APP_GET_MIXER_GAIN );
+		ByteBuffer buffer = send( FCDCommand.APP_GET_MIXER_GAIN );
 		
-		mLog.info( "FCD1: mixer gain setting is:" + gain );
+		buffer.order( ByteOrder.LITTLE_ENDIAN );
+		
+		int gain = buffer.getInt( 2 );
 
 		mMixerGain = MixerGain.valueOf( gain );
 	}

src/source/tuner/fcd/proplusV2/FCD2TunerConfigurationPanel.java

@@ -221,7 +221,7 @@ public class FCD2TunerConfigurationPanel extends JPanel
         TunerConfigurationAssignment savedConfig = mResourceManager
         		.getSettingsManager().getSelectedTunerConfiguration( 
         				TunerType.FUNCUBE_DONGLE_PRO_PLUS, 
-        								mController.getAddress() );
+        								mController.getUSBAddress() );
         
         if( savedConfig != null )
         {
@@ -237,7 +237,7 @@ public class FCD2TunerConfigurationPanel extends JPanel
         	mResourceManager.getSettingsManager()
         		.setSelectedTunerConfiguration( 
         				TunerType.FUNCUBE_DONGLE_PRO_PLUS, 
-        				mController.getAddress(), mSelectedConfig );
+        				mController.getUSBAddress(), mSelectedConfig );
         }
 
         mComboConfigurations.setSelectedItem( mSelectedConfig );
@@ -324,7 +324,7 @@ public class FCD2TunerConfigurationPanel extends JPanel
 	        
 	        mResourceManager.getSettingsManager().setSelectedTunerConfiguration( 
         			TunerType.FUNCUBE_DONGLE_PRO_PLUS, 
-        			mController.getAddress(), config );
+        			mController.getUSBAddress(), config );
         }
         catch ( SourceException e1 )
         {

src/source/tuner/fcd/proplusV2/FCD2TunerController.java

@@ -17,12 +17,15 @@
  ******************************************************************************/
 package source.tuner.fcd.proplusV2;
 
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
 import javax.swing.JPanel;
-import javax.usb.UsbClaimException;
-import javax.usb.UsbException;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.Device;
+import org.usb4java.DeviceDescriptor;
 
 import source.SourceException;
 import source.tuner.TunerClass;
@@ -31,7 +34,6 @@ import source.tuner.TunerType;
 import source.tuner.fcd.FCDCommand;
 import source.tuner.fcd.FCDTuner;
 import source.tuner.fcd.FCDTunerController;
-import source.tuner.usb.USBTunerDevice;
 import controller.ResourceManager;
 
 public class FCD2TunerController extends FCDTunerController
@@ -46,25 +48,27 @@ public class FCD2TunerController extends FCDTunerController
 	private FCD2TunerConfiguration mTunerConfiguration;
 	private FCD2TunerEditorPanel mEditor;
 	
-	public FCD2TunerController( USBTunerDevice device ) 
+	public FCD2TunerController( Device device, DeviceDescriptor descriptor ) 
-			throws SourceException 
 	{
 		super( device,
+			   descriptor,
 			   sMINIMUM_TUNABLE_FREQUENCY, 
 			   sMAXIMUM_TUNABLE_FREQUENCY );
+	}
+
+	public void init() throws SourceException
+	{
+		super.init();
 
 		mFrequencyController.setSampleRate( sSAMPLE_RATE );
 
 		try
 		{
-			open();
-			
 			setFCDMode( Mode.APPLICATION );
 		}
 		catch( Exception e )
 		{
-			throw new SourceException( "FCDTunerController error " +
+			throw new SourceException( "error setting Mode to APPLICATION", e );
-					"during construction", e );
 		}
 	}
 	
@@ -109,7 +113,7 @@ public class FCD2TunerController extends FCDTunerController
             {
                 if( plusConfig.getGainLNA() )
     			{
-                    send( FCDCommand.APP_SET_LNA_GAIN, 1 );
+                	send( FCDCommand.APP_SET_LNA_GAIN, 1 );
 
     			}
     			else
@@ -117,34 +121,26 @@ public class FCD2TunerController extends FCDTunerController
     				send( FCDCommand.APP_SET_LNA_GAIN, 0 );
     			}
             }
-            catch ( UsbClaimException e )
+            catch ( Exception e )
             {
-            	throw new SourceException( "Exception while setting LNA Gain", e );
+            	throw new SourceException( "error while setting LNA Gain", e );
-            }
-            catch ( UsbException e )
-            {
-            	throw new SourceException( "Exception while setting LNA Gain", e );
             }
 
             try
             {
                 if( plusConfig.getGainMixer() )
     			{
-                    send( FCDCommand.APP_SET_MIXER_GAIN, 1 );
+                	send( FCDCommand.APP_SET_MIXER_GAIN, 1 );
-
+                    
     			}
     			else
     			{
     				send( FCDCommand.APP_SET_MIXER_GAIN, 0 );
     			}
             }
-            catch ( UsbClaimException e )
+            catch ( Exception e )
             {
-            	throw new SourceException( "Exception while setting mixer gain", e );
+            	throw new SourceException( "error while setting Mixer Gain", e );
-            }
-            catch ( UsbException e )
-            {
-            	throw new SourceException( "Exception while setting mixer gain", e );
             }
             
             mTunerConfiguration = plusConfig;
@@ -163,17 +159,15 @@ public class FCD2TunerController extends FCDTunerController
 		
 		try
         {
-	        dcCorrection = (int)send( FCDCommand.APP_GET_DC_CORRECTION );
+			ByteBuffer buffer = send( FCDCommand.APP_GET_DC_CORRECTION );
+			
+			buffer.order( ByteOrder.LITTLE_ENDIAN );
+			
+			return buffer.getInt( 2 );
         }
-        catch ( UsbClaimException e )
+        catch ( Exception e )
         {
-        	mLog.error( "FCTTunerController - couldn't claim funcube HID to"
+        	mLog.error( "error getting dc correction value", e );
-        			+ " get dc correction value", e );
-        }
-        catch ( UsbException e )
-        {
-        	mLog.error( "FCTTunerController - error getting dc correction "
-        			+ "value", e );
         }
 		
 		return dcCorrection;
@@ -183,17 +177,11 @@ public class FCD2TunerController extends FCDTunerController
 	{
 		try
         {
-	        send( FCDCommand.APP_SET_DC_CORRECTION, value );
+			send( FCDCommand.APP_SET_DC_CORRECTION, value );
         }
-        catch ( UsbClaimException e )
+        catch ( Exception e )
         {
-        	mLog.error( "FCDTunerController - error claiming usb hid while "
+        	mLog.error( "error setting dc correction to [" + value + "]", e );
-	        		+ "trying to set dc correction to [" + value + "]", e );
-        }
-        catch ( UsbException e )
-        {
-        	mLog.error( "FCDTunerController - error while "
-	        		+ "trying to set dc correction to [" + value + "]", e );
         }
 	}
 	
@@ -203,20 +191,17 @@ public class FCD2TunerController extends FCDTunerController
 		
 		try
         {
-	        iqCorrection = (int)send( FCDCommand.APP_GET_IQ_CORRECTION );
+			ByteBuffer buffer = send( FCDCommand.APP_GET_IQ_CORRECTION );
+			
+			buffer.order( ByteOrder.LITTLE_ENDIAN );
+			
+			return buffer.getInt( 2 );
         }
-        catch ( UsbClaimException e )
+        catch ( Exception e )
         {
-        	mLog.error( "FCTTunerController - couldn't claim funcube HID to"
+        	mLog.error( "error reading IQ correction value", e );
-        			+ " get iq correction value", e );
         }
-        catch ( UsbException e )
-        {
-        	mLog.error( "FCTTunerController - error getting iq correction "
-        			+ "value", e );
 	        
-        }
-		
 		return iqCorrection;
 	}
 	
@@ -226,15 +211,9 @@ public class FCD2TunerController extends FCDTunerController
         {
 	        send( FCDCommand.APP_SET_IQ_CORRECTION, value );
         }
-        catch ( UsbClaimException e )
+        catch ( Exception e )
         {
-        	mLog.error( "FCDTunerController - error claiming usb hid while "
+        	mLog.error( "error setting IQ correction to [" + value + "]", e );
-	        		+ "trying to set iq correction to [" + value + "]", e );
-        }
-        catch ( UsbException e )
-        {
-        	mLog.error( "FCDTunerController - error while "
-	        		+ "trying to set iq correction to [" + value + "]", e );
         }
 	}
 	
@@ -272,98 +251,4 @@ public class FCD2TunerController extends FCDTunerController
 			return retVal;
 		}
 	}
-
-	public enum TunerRFFilter
-	{
-		TRF_0_4,
-		TRF_4_8,
-		TRF_8_16,
-		TRF_16_32,
-		TRF_32_75,
-		TRF_75_125,
-		TRF_125_250,
-		TRF_145,
-		TRF_410_875,
-		TRF_435,
-		TRF_875_2000,
-		UNKNOWN;
-		
-		public static TunerRFFilter get( int value )
-		{
-			TunerRFFilter retVal = UNKNOWN;
-			
-			if( 0 <= value && value <= 10 )
-			{
-				retVal = values()[ value ];
-			}
-			
-			return retVal;
-		}
-	}
-
-	public enum TunerIFFilter
-	{
-		TIF_200KHZ,
-		TIF_300KHZ,
-		TIF_600KHZ,
-		TIF_1536KHZ,
-		TIF_5MHZ,
-		TIF_6MHZ,
-		TIF_7MHZ,
-		TIF_8MHZ,
-		UNKNOWN;
-		
-		public static TunerIFFilter get( int value )
-		{
-			TunerIFFilter retVal = UNKNOWN;
-			
-			if( 0 <= value && value <= 7 )
-			{
-				retVal = values()[ value ];
-			}
-			
-			return retVal;
-		}
-	}
-	
-    public enum LNAGain 
-    {
-    	LNA_GAIN_MINUS_5_0( 0, "-5.0 dB" ),
-    	LNA_GAIN_MINUS_2_5( 1, "-2.5 dB" ),
-    	LNA_GAIN_PLUS_0_0( 4, "0.0 dB" ),
-    	LNA_GAIN_PLUS_2_5( 5, "2.5 dB" ),
-    	LNA_GAIN_PLUS_5_0( 6, "5.0 dB" ),
-    	LNA_GAIN_PLUS_7_5( 7, "7.5 dB" ),
-    	LNA_GAIN_PLUS_10_0( 8, "10.0 dB" ),
-    	LNA_GAIN_PLUS_12_5( 9, "12.5 dB" ),
-    	LNA_GAIN_PLUS_15_0( 10, "15.0 dB" ),
-    	LNA_GAIN_PLUS_17_5( 11, "17.5 dB" ),
-    	LNA_GAIN_PLUS_20_0( 12, "20.0 dB" ),
-    	LNA_GAIN_PLUS_25_0( 13, "25.0 dB" ),
-    	LNA_GAIN_PLUS_30_0( 14, "30.0 dB" );
-    	
-    	private int mSetting;
-    	private String mLabel;
-    	
-    	private LNAGain( int setting, String label )
-    	{
-    		mSetting = setting;
-    		mLabel = label;
-    	}
-    	
-    	public int getSetting()
-    	{
-    		return mSetting;
-    	}
-    	
-    	public String getLabel()
-    	{
-    		return mLabel;
-    	}
-    	
-    	public String toString()
-    	{
-    		return getLabel();
-    	}
-    }
 }

src/source/tuner/hackrf/HackRFTuner.java

@@ -70,6 +70,11 @@ public class HackRFTuner extends Tuner
 			mLog.error( "couldn't read HackRF board id", e  );
 		}
 	}
+
+	public void dispose()
+	{
+		//TODO: dispose of something here
+	}
 	
 	public HackRFTunerController getController()
 	{

src/source/tuner/hackrf/HackRFTunerConfiguration.java

@@ -31,6 +31,7 @@ public class HackRFTunerConfiguration extends TunerConfiguration
 	private HackRFSampleRate mSampleRate = HackRFSampleRate.RATE2_016MHZ;
 	private HackRFLNAGain mLNAGain = HackRFLNAGain.GAIN_0;
 	private HackRFVGAGain mVGAGain = HackRFVGAGain.GAIN_10;
+	private boolean mAmplifierEnabled = false;
 	private double mFrequencyCorrection = 0.0d;
 
 	/**
@@ -52,6 +53,17 @@ public class HackRFTunerConfiguration extends TunerConfiguration
 	    return TunerType.HACKRF;
     }
 
+	@XmlAttribute( name = "amplifier_enabled" )
+	public boolean getAmplifierEnabled()
+	{
+		return mAmplifierEnabled;
+	}
+	
+	public void setAmplifierEnabled( boolean enabled )
+	{
+		mAmplifierEnabled = enabled;
+	}
+	
 	@XmlAttribute( name = "lna_gain" )
 	public HackRFLNAGain getLNAGain()
 	{

src/source/tuner/hackrf/HackRFTunerConfigurationPanel.java

@@ -35,6 +35,7 @@ import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JSpinner;
 import javax.swing.JTextField;
+import javax.swing.JToggleButton;
 import javax.swing.SpinnerModel;
 import javax.swing.SpinnerNumberModel;
 import javax.swing.SwingConstants;
@@ -74,6 +75,7 @@ public class HackRFTunerConfigurationPanel extends JPanel
     private JTextField mName;
 
     private JSpinner mFrequencyCorrection;
+    private JToggleButton mAmplifier;
     private JComboBox<HackRFLNAGain> mComboLNAGain;
     private JComboBox<HackRFVGAGain> mComboVGAGain;
     
@@ -284,8 +286,38 @@ public class HackRFTunerConfigurationPanel extends JPanel
          * Gain Controls 
          */
         JPanel gainPanel = new JPanel();
-        gainPanel.setLayout( new MigLayout( "", "[grow,fill]", "[grow,fill]" ) );
+        gainPanel.setLayout( new MigLayout( "", 
+        		"[][right][grow,fill][right][grow,fill]", "[grow,fill]" ) );
         gainPanel.setBorder( BorderFactory.createTitledBorder( "Gain" ) );
+
+        /* Amplifier */
+        mAmplifier = new JToggleButton( "Amp" );
+        mAmplifier.setSelected( mSelectedConfig.getAmplifierEnabled() );
+        mAmplifier.addActionListener( new ActionListener() 
+        {
+			@Override
+            public void actionPerformed( ActionEvent arg0 )
+            {
+				try
+                {
+	                mController.setAmplifierEnabled( mAmplifier.isSelected() );
+					mSelectedConfig.setAmplifierEnabled( mAmplifier.isSelected() );
+					save();
+                }
+                catch ( UsbException e )
+                {
+                	mLog.error( "couldn't enable/disable amplifier", e );
+                	mAmplifier.setEnabled( !mAmplifier.isSelected() );
+                	
+                	JOptionPane.showMessageDialog( 
+            			HackRFTunerConfigurationPanel.this, 
+            			"Couldn't change amplifier setting",  
+            			"Error changing amplifier setting", 
+            			JOptionPane.ERROR_MESSAGE );
+                }
+            }
+        } );
+        gainPanel.add( mAmplifier );
         
         /* LNA Gain Control */
         mComboLNAGain = new JComboBox<HackRFLNAGain>( HackRFLNAGain.values() );
@@ -311,6 +343,7 @@ public class HackRFTunerConfigurationPanel extends JPanel
 					}
 
 					mSelectedConfig.setLNAGain( lnaGain );
+					
 	                save();
                 }
                 catch ( UsbException e )
@@ -325,8 +358,8 @@ public class HackRFTunerConfigurationPanel extends JPanel
                 }
             }
         } );
-        mComboLNAGain.setToolTipText( "<html>LNA Gain.  Set master gain "
+        mComboLNAGain.setToolTipText( "<html>LNA Gain.  Adjust to set "
-        		+ "to <b>MANUAL</b> to enable adjustment</html>" );
+        		+ "the IF gain</html>" );
         gainPanel.add( new JLabel( "LNA" ) );
         gainPanel.add( mComboLNAGain );
 
@@ -367,12 +400,12 @@ public class HackRFTunerConfigurationPanel extends JPanel
                 }
             }
         } );
-        mComboVGAGain.setToolTipText( "<html>VGA Gain.  Set master gain "
+        mComboVGAGain.setToolTipText( "<html>VGA Gain.  Adjust to set the "
-        		+ "to <b>MANUAL</b> to enable adjustment</html>" );
+        		+ "baseband gain</html>" );
         gainPanel.add( new JLabel( "VGA" ) );
         gainPanel.add( mComboVGAGain, "wrap" );
 
-        add( gainPanel, "span" );
+        add( gainPanel, "span,growx" );
 
         /**
          * Create a new configuration

src/source/tuner/hackrf/HackRFTunerController.java

@@ -1,5 +1,7 @@
 package source.tuner.hackrf;
 
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
@@ -10,46 +12,34 @@ import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
 
-import javax.usb.UsbClaimException;
-import javax.usb.UsbConfiguration;
-import javax.usb.UsbControlIrp;
-import javax.usb.UsbDevice;
-import javax.usb.UsbDisconnectedException;
-import javax.usb.UsbEndpoint;
-import javax.usb.UsbEndpointDescriptor;
 import javax.usb.UsbException;
-import javax.usb.UsbInterface;
-import javax.usb.UsbInterfacePolicy;
-import javax.usb.UsbIrp;
-import javax.usb.UsbNotActiveException;
-import javax.usb.UsbNotOpenException;
-import javax.usb.UsbPipe;
-import javax.usb.event.UsbPipeDataEvent;
-import javax.usb.event.UsbPipeErrorEvent;
-import javax.usb.event.UsbPipeListener;
 
 import org.apache.commons.io.EndianUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.Device;
+import org.usb4java.DeviceDescriptor;
+import org.usb4java.DeviceHandle;
 import org.usb4java.LibUsb;
+import org.usb4java.LibUsbException;
+import org.usb4java.Transfer;
+import org.usb4java.TransferCallback;
 
 import sample.Listener;
 import source.SourceException;
 import source.tuner.TunerConfiguration;
 import source.tuner.TunerController;
 import source.tuner.rtl.ByteSampleAdapter;
-import source.tuner.usb.USBTunerDevice;
 
 public class HackRFTunerController extends TunerController
 {
 	private final static Logger mLog = 
 			LoggerFactory.getLogger( HackRFTunerController.class );
 
+	public final static long TIMEOUT_US = 1000000l; //uSeconds
 	public static final byte USB_ENDPOINT = (byte)0x81;
 	public static final byte USB_INTERFACE = (byte)0x0;
-	public static final boolean USB_FORCE_CLAIM_INTERFACE = true;
 	
 	public static final byte REQUEST_TYPE_IN = 
 								(byte)( LibUsb.ENDPOINT_IN | 
@@ -65,10 +55,10 @@ public class HackRFTunerController extends TunerController
 	public static final long MAX_FREQUENCY = 6000000000l;
 	public static final long DEFAULT_FREQUENCY = 101100000;
 
-	public final static int USB_IRP_POOL_SIZE = 10;
+	public final static int TRANSFER_BUFFER_POOL_SIZE = 16;
 	
-	private LinkedTransferQueue<UsbIrp> mReceivedBuffers = 
+	private LinkedTransferQueue<byte[]> mFilledBuffers = 
-								new LinkedTransferQueue<UsbIrp>();
+			new LinkedTransferQueue<byte[]>();
 	
 	private CopyOnWriteArrayList<Listener<Float[]>> mSampleListeners =
 							new CopyOnWriteArrayList<Listener<Float[]>>();
@@ -76,63 +66,42 @@ public class HackRFTunerController extends TunerController
 	private ByteSampleAdapter mSampleAdapter = new ByteSampleAdapter();
 	private BufferProcessor mBufferProcessor = new BufferProcessor();
 	
-	private UsbDevice mUSBDevice;
+	private HackRFSampleRate mSampleRate = HackRFSampleRate.RATE2_016MHZ;
-	private UsbInterface mUSBInterface;
+	public int mBufferSize = 262144;
-	private UsbPipe mUSBPipe;
+	private boolean mAmplifierEnabled = false;
 	
-	private HackRFSampleRate mSampleRate = HackRFSampleRate.RATE4_464MHZ;
+	private Device mDevice;
-	public int mBufferSize = mSampleRate.getBufferSize();
+	private DeviceDescriptor mDeviceDescriptor;
+	private DeviceHandle mDeviceHandle;
 	
-	public HackRFTunerController( USBTunerDevice tunerDevice ) 
+	public HackRFTunerController( Device device, DeviceDescriptor descriptor ) 
 						throws SourceException
 	{
 	    super( MIN_FREQUENCY, MAX_FREQUENCY );
-	    
+
-	    mUSBDevice = tunerDevice.getDevice();
+	    mDevice = device;
+	    mDeviceDescriptor = descriptor;
 	}
 	
 	public void init() throws SourceException
 	{
-		mLog.info( "HackRF Tuner Controller init() starting" );
+		mDeviceHandle = new DeviceHandle();
-
+		
-		UsbConfiguration config = mUSBDevice.getActiveUsbConfiguration();
+		LibUsb.open( mDevice, mDeviceHandle );
 		
-		mUSBInterface = config.getUsbInterface( USB_INTERFACE );
-
 		try
 		{
-			if( claim( mUSBInterface ) )
+			claimInterface();
-			{
+
-				/* Get the USB endpoint */
+			setMode( Mode.RECEIVE );
-				UsbEndpoint endpoint = mUSBInterface.getUsbEndpoint( USB_ENDPOINT );
+			
-				
+			setFrequency( DEFAULT_FREQUENCY );
-				UsbEndpointDescriptor d = endpoint.getUsbEndpointDescriptor();
-				System.out.println( "Endpoint max packet size:" + d.wMaxPacketSize() );
-				
-				mUSBPipe = endpoint.getUsbPipe();
-				
-				setMode( Mode.RECEIVE );
-				
-				setFrequency( DEFAULT_FREQUENCY );
-			}
-			else
-			{
-				throw new SourceException( "HackRF Tuner Controller - couldn't "
-						+ "claim USB interface" );
-			}
 		}
-		catch( UsbException e )
+		catch( Exception e )
 		{
 			throw new SourceException( "HackRF Tuner Controller - couldn't "
 					+ "claim USB interface or get endpoint or pipe", e );
 		}
-        catch ( UsbDisconnectedException e )
-        {
-			throw new SourceException( "HackRF Tuner Controller - usb device "
-					+ "is disconnected", e );
-        }
-		
-		mLog.info( "HackRF Tuner Controller init() complete" );
 	}
 
 	/**
@@ -141,29 +110,39 @@ public class HackRFTunerController extends TunerController
 	 * will dictate if the interface is forcibly claimed from the other 
 	 * application
 	 */
-	public static boolean claim( UsbInterface iface ) throws UsbException, 
+	private void claimInterface() throws SourceException
-														   UsbClaimException
 	{
-		if( !iface.isClaimed() )
+		if( mDeviceHandle != null )
 		{
-			iface.claim( new UsbInterfacePolicy() 
+			int result = LibUsb.kernelDriverActive( mDeviceHandle, USB_INTERFACE );
+					
+			if( result == 1 )
 			{
-				@Override
+				result = LibUsb.detachKernelDriver( mDeviceHandle, USB_INTERFACE );
-                public boolean forceClaim( UsbInterface arg0 )
+
-                {
+				if( result != LibUsb.SUCCESS )
-                    return USB_FORCE_CLAIM_INTERFACE;
+				{
-                }
+					mLog.error( "failed attempt to detach kernel driver [" + 
-			} );
+							LibUsb.errorName( result ) + "]" );
+					
+					throw new SourceException( "couldn't detach kernel driver "
+							+ "from device" );
+				}
+			}
 			
-			return iface.isClaimed();
+			result = LibUsb.claimInterface( mDeviceHandle, USB_INTERFACE );
+			
+			if( result != LibUsb.SUCCESS )
+			{
+				throw new SourceException( "couldn't claim usb interface [" + 
+					LibUsb.errorName( result ) + "]" );
+			}
 		}
 		else
 		{
-			mLog.error( "attempt to claim USB interface failed - in use by "
+			throw new SourceException( "couldn't claim usb interface - no "
-					+ "another application" );
+					+ "device handle" );
 		}
-		
-		return false;
 	}
 
 	/**
@@ -181,19 +160,13 @@ public class HackRFTunerController extends TunerController
 	 */
 	public String getFirmwareVersion() throws UsbException
 	{
-		byte[] data = readArray( Request.VERSION_STRING_READ, 0, 0, 255 ); 
+		ByteBuffer buffer = readArray( Request.VERSION_STRING_READ, 0, 0, 255 ); 
+
+		byte[] data = new byte[ 255 ];
 		
-		StringBuilder sb = new StringBuilder();
+		buffer.get( data );
-		
+
-		for( byte b: data )
+		return new String( data );
-		{
-			if( b != (byte)0 )
-			{
-				sb.append( (char)b );
-			}
-		}
-		
-		return sb.toString();
 	}
 	
 	/**
@@ -201,9 +174,9 @@ public class HackRFTunerController extends TunerController
 	 */
 	public Serial getSerial() throws UsbException
 	{
-		byte[] data = readArray( Request.BOARD_PARTID_SERIALNO_READ, 0, 0, 24 ); 
+		ByteBuffer buffer = readArray( Request.BOARD_PARTID_SERIALNO_READ, 0, 0, 24 ); 
 
-		return new Serial( data ); 
+		return new Serial( buffer ); 
 	}
 
 	/**
@@ -230,6 +203,13 @@ public class HackRFTunerController extends TunerController
 	public void setAmplifierEnabled( boolean enabled ) throws UsbException
 	{
 		write( Request.AMP_ENABLE, ( enabled ? 1 : 0 ), 0 );
+		
+		mAmplifierEnabled = enabled;
+	}
+	
+	public boolean getAmplifier()
+	{
+		return mAmplifierEnabled;
 	}
 
 	/**
@@ -269,17 +249,20 @@ public class HackRFTunerController extends TunerController
 	@Override
     public void setTunedFrequency( long frequency ) throws SourceException
     {
+		ByteBuffer buffer = ByteBuffer.allocateDirect( 8 );
+		buffer.order( ByteOrder.LITTLE_ENDIAN );
+		
 		int mhz = (int)( frequency / 1E6 );
 		int hz = (int)( frequency - ( mhz * 1E6 ) );
-		
+
-		byte[] data = new byte[ 8 ];
+		buffer.putInt( mhz );
-		
+		buffer.putInt( hz );
-		EndianUtils.writeSwappedInteger( data, 0, mhz );
+
-		EndianUtils.writeSwappedInteger( data, 4, hz );
+		buffer.rewind();
 
 		try
 		{
-			write( Request.SET_FREQUENCY, 0, 0, data );
+			write( Request.SET_FREQUENCY, 0, 0, buffer );
 		}
 		catch( UsbException e )
 		{
@@ -288,7 +271,6 @@ public class HackRFTunerController extends TunerController
 			throw new SourceException( "error setting frequency [" + 
 					frequency + "]", e );
 		}
-	    
     }
 
 	@Override
@@ -302,15 +284,15 @@ public class HackRFTunerController extends TunerController
     {
 		if( config instanceof HackRFTunerConfiguration )
 		{
-			HackRFTunerConfiguration hackConfig = 
+			HackRFTunerConfiguration hackRFConfig = 
 					(HackRFTunerConfiguration)config;
 			
 			try
             {
-	            setSampleRate( hackConfig.getSampleRate() );
+	            setSampleRate( hackRFConfig.getSampleRate() );
-	            setFrequencyCorrection( hackConfig.getFrequencyCorrection() );
+	            setFrequencyCorrection( hackRFConfig.getFrequencyCorrection() );
-	            setLNAGain( hackConfig.getLNAGain() );
+	            setLNAGain( hackRFConfig.getLNAGain() );
-	            setVGAGain( hackConfig.getVGAGain() );
+	            setVGAGain( hackRFConfig.getVGAGain() );
 	            setFrequency( getFrequency() );
             }
             catch ( UsbException e )
@@ -326,21 +308,35 @@ public class HackRFTunerController extends TunerController
 		}
     }
 	
-	public byte[] readArray( Request request, 
+	public ByteBuffer readArray( Request request, 
 							 int value, 
 							 int index, 
 							 int length ) throws UsbException
 	{
-		UsbControlIrp irp = mUSBDevice.createUsbControlIrp( REQUEST_TYPE_IN, 
+		if( mDeviceHandle != null )
-				request.getRequestNumber(), (short)value, (short)index );
+		{
+			ByteBuffer buffer = ByteBuffer.allocateDirect( length );
+			
+			int transferred = LibUsb.controlTransfer( mDeviceHandle, 
+													  REQUEST_TYPE_IN, 
+													  request.getRequestNumber(), 
+													  (short)value,
+													  (short)index,
+													  buffer, 
+													  TIMEOUT_US );
 
-		byte[] data = new byte[ length ];
+			if( transferred < 0 )
-		
+			{
-		irp.setData( data );
+				throw new LibUsbException( "read error", transferred );
-		
+			}
-		mUSBDevice.syncSubmit( irp );
+
-		
+			return buffer;
-		return data;
+		}
+		else
+		{
+			throw new LibUsbException( "device handle is null", 
+							LibUsb.ERROR_NO_DEVICE );
+		}
 	}
 	
 	public int read( Request request, int value, int index, int length ) 
@@ -349,10 +345,14 @@ public class HackRFTunerController extends TunerController
 		if( !( length == 1 || length == 2 || length == 4 ) )
 		{
 			throw new IllegalArgumentException( "invalid length [" + length + 
-					"] must be: byte=1, short=2, int=3 to read a primitive" );
+					"] must be: byte=1, short=2, int=4 to read a primitive" );
 		}
 		
-		byte[] data = readArray( request, value, index, length );
+		ByteBuffer buffer = readArray( request, value, index, length );
+		
+		byte[] data = new byte[ buffer.capacity() ];
+		
+		buffer.get( data );
 		
 		switch( data.length )
 		{
@@ -371,29 +371,50 @@ public class HackRFTunerController extends TunerController
 	public int readByte( Request request, int value, int index, boolean signed ) 
 									throws UsbException
 	{
-		byte[] data = readArray( request, value, index, 1 );
+		ByteBuffer buffer = readArray( request, value, index, 1 );
 
 		if( signed )
 		{
-			return (int)( data[ 0 ] );
+			return (int)( buffer.get() );
 		}
 		else
 		{
-			return (int)( data[ 0 ] & 0xFF );
+			return (int)( buffer.get() & 0xFF );
 		}
 	}
 	
 	public void write( Request request, 
 					   int value, 
 					   int index, 
-					   byte[] data ) throws UsbException
+					   ByteBuffer buffer ) throws UsbException
 	{
-		UsbControlIrp irp = mUSBDevice.createUsbControlIrp( REQUEST_TYPE_OUT, 
+		if( mDeviceHandle != null )
-					request.getRequestNumber(), (short)value, (short)index );
+		{
+			int transferred = LibUsb.controlTransfer( mDeviceHandle, 
+													  REQUEST_TYPE_OUT,
+													  request.getRequestNumber(),
+													  (short)value, 
+													  (short)index, 
+													  buffer, 
+													  TIMEOUT_US );
 
-		irp.setData( data );
+			if( transferred < 0 )
-		
+			{
-		mUSBDevice.syncSubmit( irp );
+				throw new LibUsbException( "error writing byte buffer", 
+								transferred );
+			}
+			else if( transferred != buffer.capacity() )
+			{
+				throw new LibUsbException( "transferred bytes [" + 
+						transferred + "] is not what was expected [" + 
+						buffer.capacity() + "]", transferred );
+			}
+		}
+		else
+		{
+			throw new LibUsbException( "device handle is null", 
+							LibUsb.ERROR_NO_DEVICE );
+		}
 	}
 
 	/**
@@ -403,64 +424,22 @@ public class HackRFTunerController extends TunerController
 					   int value, 
 					   int index ) throws UsbException
 	{
-		write( request, value, index, new byte[ 0 ] );
+		write( request, value, index, ByteBuffer.allocateDirect( 0 ) );
 	}
 
 	/**
 	 * Sample Rate
 	 * 
-	 *  Note: this is direct translation of the libhackrf code, because I still
+	 * Note: the libhackrf set sample rate method is designed to allow fractional
-	 *  can't figure out how it works ... one day, maybe.
+	 * sample rates.  However, since we're only using integral sample rates, we
+	 * simply invoke the setSampleRateManual method directly.
 	 */
 	public void setSampleRate( HackRFSampleRate rate ) throws UsbException
 	{
-//		int MAX_N = 32;
-//		
-//		double freq = (double)rate.getRate() / 1E6d;
-//		
-//		double freq_frac = 1.0d + freq - (int)freq;
-//		
-//		long u64 = Double.doubleToLongBits( freq );
-//		
-//		int e = (int)( ( u64 >> 52 ) - 1023 );
-//		
-//		long m = (long)( 1l << 52 ) - 1l;
-//		
-//		u64 = Double.doubleToLongBits( freq_frac );
-//		
-//		u64 &= m;
-//		
-//		m &= ~( ( 1 << ( e + 4 ) ) - 1 );
-//
-//		long a = 0;
-//
-//		int x;
-//		
-//		for( x = 1; x < MAX_N; x++ )
-//		{
-//			a += u64;
-//
-//			if( ( ( a & m ) == 0 ) || ( ( ~a & m ) == 0 ) )
-//			{
-//				break;
-//			}
-//		}
-//
-//		if( x == MAX_N )
-//		{
-//			x = 1;
-//		}
-//
-//		int freq_hz = (int)( freq * (double)x * 0.5d );
-//		
-//		setSampleRateManual( freq_hz, x );
-
 		setSampleRateManual( rate.getRate(), 1 );
 		
 		mFrequencyController.setSampleRate( rate.getRate() );
 		
-		mBufferSize = rate.getBufferSize();
-		
 		setBasebandFilter( rate.getFilter() );
 		
 		mSampleRate = rate;
@@ -469,12 +448,14 @@ public class HackRFTunerController extends TunerController
 	public void setSampleRateManual( int frequency, int divider ) 
 							throws UsbException
 	{
-		byte[] data = new byte[ 8 ];
+		ByteBuffer buffer = ByteBuffer.allocateDirect( 8 );
-		
-		EndianUtils.writeSwappedInteger( data, 0, frequency );
-		EndianUtils.writeSwappedInteger( data, 4, divider );
 
-		write( Request.SET_SAMPLE_RATE, 0, 0, data );
+		buffer.order( ByteOrder.LITTLE_ENDIAN );
+
+		buffer.putInt( frequency );
+		buffer.putInt( divider );
+
+		write( Request.SET_SAMPLE_RATE, 0, 0, buffer );
 	}
 	
 	public int getSampleRate()
@@ -522,29 +503,26 @@ public class HackRFTunerController extends TunerController
 
 	public enum HackRFSampleRate
 	{
-		RATE2_016MHZ(   2016000,  65536,  "2.016 MHz", BasebandFilter.F2_50 ),
+		RATE2_016MHZ(   2016000,  "2.016 MHz", BasebandFilter.F3_50 ),
-		RATE3_024MHZ(   3024000,  98304,  "3.024 MHz", BasebandFilter.F3_50 ),
+		RATE3_024MHZ(   3024000,  "3.024 MHz", BasebandFilter.F5_00 ),
-		RATE4_464MHZ(   4464000, 131072,  "4.464 MHz", BasebandFilter.F5_00 ),
+		RATE4_464MHZ(   4464000,  "4.464 MHz", BasebandFilter.F6_00 ),
-		RATE5_472MHZ(   5472000, 196608,  "5.472 MHz", BasebandFilter.F6_00 ),
+		RATE5_472MHZ(   5472000,  "5.472 MHz", BasebandFilter.F7_00 ),
-		RATE7_488MHZ(   7488000, 262144,  "7.488 MHz", BasebandFilter.F8_00 ),
+		RATE7_488MHZ(   7488000,  "7.488 MHz", BasebandFilter.F9_00 ),
-		RATE10_032MHZ(  9984000, 131072, " 9.984 MHz", BasebandFilter.F10_00 ),
+		RATE10_032MHZ(  9984000, " 9.984 MHz", BasebandFilter.F12_00 ),
-		RATE12_000MHZ( 12000000, 262144, "12.000 MHz", BasebandFilter.F12_00 ),
+		RATE12_000MHZ( 12000000, "12.000 MHz", BasebandFilter.F14_00 ),
-		RATE13_488MHZ( 13488000, 262144, "13.488 MHz", BasebandFilter.F14_00 ),
+		RATE13_488MHZ( 13488000, "13.488 MHz", BasebandFilter.F15_00 ),
-		RATE14_976MHZ( 14976000, 262144, "14.976 MHz", BasebandFilter.F15_00 ),
+		RATE14_976MHZ( 14976000, "14.976 MHz", BasebandFilter.F20_00 ),
-		RATE19_968MHZ( 19968000, 262144, "19.968 MHz", BasebandFilter.F20_00 );
+		RATE19_968MHZ( 19968000, "19.968 MHz", BasebandFilter.F24_00 );
 		
 		private int mRate;
-		private int mBufferSize;
 		private String mLabel;
 		private BasebandFilter mFilter;
 		
 		private HackRFSampleRate( int rate, 
-								  int bufferSize, 
 								  String label, 
 								  BasebandFilter filter )
 		{
 			mRate = rate;
-			mBufferSize = bufferSize;
 			mLabel = label;
 			mFilter = filter;
 		}
@@ -554,11 +532,6 @@ public class HackRFTunerController extends TunerController
 			return mRate;
 		}
 		
-		public int getBufferSize()
-		{
-			return mBufferSize;
-		}
-		
 		public String getLabel()
 		{
 			return mLabel;
@@ -577,6 +550,7 @@ public class HackRFTunerController extends TunerController
 	
 	public enum BasebandFilter
 	{
+		FAUTO(         0,  "AUTO" ),
 		F1_75(   1750000,  "1.75 MHz" ),
 		F2_50(   2500000,  "2.50 MHz" ),
 		F3_50(   3500000,  "3.50 MHz" ),
@@ -793,9 +767,11 @@ public class HackRFTunerController extends TunerController
 	{
 		private byte[] mData;
 		
-		public Serial( byte[] data )
+		public Serial( ByteBuffer buffer )
 		{
-			mData = data;
+			mData = new byte[ buffer.capacity() ];
+			
+			buffer.get( mData );
 		}
 		
 		public String getPartID()
@@ -841,8 +817,16 @@ public class HackRFTunerController extends TunerController
     {
 		mSampleListeners.add( listener );
 
-		System.out.println( "HackRF - listener added - count:" + mSampleListeners.size() );
+		if( mBufferProcessor == null || !mBufferProcessor.isRunning() )
-		mBufferProcessor.start();
+		{
+			mBufferProcessor = new BufferProcessor();
+
+			Thread thread = new Thread( mBufferProcessor );
+			thread.setDaemon( true );
+			thread.setName( "Sample Processor" );
+
+			thread.start();
+		}
     }
 
 	/**
@@ -889,93 +873,72 @@ public class HackRFTunerController extends TunerController
     }
 
 	/**
-	 * Buffer processing thread.  Fetches samples from the RTL2832 Tuner and 
+	 * Buffer processing thread.  Fetches samples from the HackRF Tuner and 
 	 * dispatches them to all registered listeners
 	 */
-	public class BufferProcessor implements UsbPipeListener
+	public class BufferProcessor implements Runnable, TransferCallback
 	{
 		private ScheduledExecutorService mExecutor = 
-							Executors.newScheduledThreadPool( 2 );
+							Executors.newScheduledThreadPool( 1 );
 		private ScheduledFuture<?> mSampleDispatcherTask;
-//		private ScheduledFuture<?> mSampleRateCounterTask;
+        private ArrayList<Transfer> mTransfers;
-		
 		private AtomicBoolean mRunning = new AtomicBoolean();
-		private AtomicBoolean mResetting = new AtomicBoolean();
-		private Boolean mTransitioning = false;
 
-        public void start()
+		@Override
+        public void run()
         {
-			synchronized( mTransitioning )
+			if( mRunning.compareAndSet( false, true ) )
 			{
-				if( mRunning.compareAndSet( false, true ) )
+				mLog.debug( "starting sample fetch thread" );
+
+	            prepareTransfers();
+	            
+				for( Transfer transfer: mTransfers )
 				{
-					mLog.debug( "HackRF - starting sample fetch thread" );
+					int result = LibUsb.submitTransfer( transfer );
-
-					ArrayList<UsbIrp> irps = new ArrayList<UsbIrp>();
 					
-					for( int x = 0; x < USB_IRP_POOL_SIZE; x++ )
+					if( result != LibUsb.SUCCESS )
 					{
-						UsbIrp irp = mUSBPipe.createUsbIrp();
+						mLog.error( "error submitting transfer [" + 
-						irp.setData( new byte[ mBufferSize ] );
+								LibUsb.errorName( result ) + "]" );
-						irps.add( irp );
+						break;
 					}
-
-					try
-		            {
-						if( mUSBPipe.isActive() )
-						{
-							if( !mUSBPipe.isOpen() )
-							{
-								mUSBPipe.open();
-								
-								mUSBPipe.addUsbPipeListener( this );
-							}
-							
-							if( mUSBPipe.isOpen() )
-							{
-					            mSampleDispatcherTask = mExecutor
-				            		.scheduleAtFixedRate( new BufferDispatcher(), 
-	            							  0, 20, TimeUnit.MILLISECONDS );
-					            
-//					            mSampleRateMonitor = 
-//				            		new SampleRateMonitor( mSampleRate.getRate() );
-					            
-//					            mSampleRateCounterTask = mExecutor
-//					            		.scheduleAtFixedRate( mSampleRateMonitor, 
-//	            							  10, 10, TimeUnit.SECONDS );
-
-					            mUSBPipe.asyncSubmit( irps );
-							}
-						}
-		            }
-		            catch ( Exception e )
-		            {
-		            	mLog.error( "Error in buffer processor thread", e );
-		            }
 				}
-	        }
+
-		}
+	            mSampleDispatcherTask = mExecutor
+	            		.scheduleAtFixedRate( new BufferDispatcher(), 
+								  0, 20, TimeUnit.MILLISECONDS );
+
+            	while( mRunning.get() )
+				{
+					ByteBuffer completed = ByteBuffer.allocateDirect( 4 );
+					
+					int result = LibUsb.handleEventsTimeoutCompleted( 
+							null, TIMEOUT_US, completed.asIntBuffer() );
+					
+					if( result != LibUsb.SUCCESS )
+					{
+						mLog.error( "error handling events for libusb" );
+					}
+				}
+			}
+        }
 
 		/**
 		 * Stops the sample fetching thread
 		 */
 		public void stop()
 		{
-			synchronized( mTransitioning )
+			if( mRunning.compareAndSet( true, false ) )
 			{
-				if( mRunning.compareAndSet( true, false ) )
+				mLog.debug( "stopping sample fetch thread" );
-				{
-					mLog.debug( "HackRF - stopping sample fetch thread" );
 
-					mUSBPipe.abortAllSubmissions();
+				cancel();
-					
+				
-					if( mSampleDispatcherTask != null )
+				if( mSampleDispatcherTask != null )
-					{
+				{
-						mSampleDispatcherTask.cancel( true );
+					mSampleDispatcherTask.cancel( true );
-//						mSampleRateCounterTask.cancel( true );
+					mFilledBuffers.clear();
-//						mRawSampleBuffer.clear();
-//						mSampleCounter.set( 0 );
-					}
 				}
 			}
 		}
@@ -987,85 +950,150 @@ public class HackRFTunerController extends TunerController
 		{
 			return mRunning.get();
 		}
-
+		
-		/**
-		 * Receives filled data buffers and places them in the queue for the 
-		 * BufferDispatcher to process
-		 */
 		@Override
-        public synchronized void dataEventOccurred( UsbPipeDataEvent event )
+	    public void processTransfer( Transfer transfer )
-        {
+	    {
-			mReceivedBuffers.add( event.getUsbIrp() );
+			if( transfer.status() == LibUsb.TRANSFER_COMPLETED )
-        }
-
-		@Override
-        public void errorEventOccurred( UsbPipeErrorEvent e )
-        {
-			/* When an error occurs, we'll get errors on all of the 
-			 * queued IRPS in succession.  We use the mResetting to control
-			 * the reset process and ignore all subsequent errors */
-			if( mResetting.compareAndSet( false, true ) )
 			{
-				mLog.error( "error during data transfer resetting USB pipe to "
+				ByteBuffer buffer = transfer.buffer();
-						+ "HackRF", e );
 				
-	        	stop();
+				byte[] data = new byte[ transfer.actualLength() ];
-	        	
+				
-	        	if( !mSampleListeners.isEmpty() )
+				buffer.get( data );
-	        	{
-		        	start();
-	        	}
 
-		        mResetting.set( false );
+				buffer.rewind();
+
+				mFilledBuffers.add( data );
+				
+				if( !isRunning() )
+				{
+					LibUsb.cancelTransfer( transfer );
+				}
 			}
-        }
+			
+			switch( transfer.status() )
+			{
+				case LibUsb.TRANSFER_COMPLETED:
+					/* resubmit the transfer */
+					int result = LibUsb.submitTransfer( transfer );
+					
+					if( result != LibUsb.SUCCESS )
+					{
+						mLog.error( "couldn't resubmit buffer transfer to tuner" );
+						LibUsb.freeTransfer( transfer );
+						mTransfers.remove( transfer );
+					}
+					break;
+				case LibUsb.TRANSFER_CANCELLED:
+					/* free the transfer and remove it */
+					LibUsb.freeTransfer( transfer );
+					mTransfers.remove( transfer );
+					break;
+				default:
+					/* unexpected error */
+					mLog.error( "transfer error [" + 
+						getTransferStatus( transfer.status() ) + 
+						"] transferred actual: " + transfer.actualLength() );
+			}
+	    }
+		
+		private void cancel()
+		{
+			for( Transfer transfer: mTransfers )
+			{
+				LibUsb.cancelTransfer( transfer );
+			}
+
+			ByteBuffer completed = ByteBuffer.allocateDirect( 4 );
+
+			int result = LibUsb.handleEventsTimeoutCompleted( 
+					null, TIMEOUT_US, completed.asIntBuffer() );
+			
+			if( result != LibUsb.SUCCESS )
+			{
+				mLog.error( "error handling usb events during cancel [" + 
+						LibUsb.errorName( result ) + "]" );
+			}
+		}
+		
+	    /**
+	     * Prepares (allocates) a set of transfer buffers for use in 
+	     * transferring data from the tuner via the bulk interface
+	     */
+	    private void prepareTransfers() throws LibUsbException
+	    {
+	    	mTransfers = new ArrayList<Transfer>();
+
+	    	for( int x = 0; x < TRANSFER_BUFFER_POOL_SIZE; x++ )
+	    	{
+	    		Transfer transfer = LibUsb.allocTransfer();
+
+	    		if( transfer == null )
+	    		{
+	    			throw new LibUsbException( "couldn't allocate transfer", 
+	    						LibUsb.ERROR_NO_MEM );
+	    		}
+	    		
+	    		final ByteBuffer buffer = 
+	    				ByteBuffer.allocateDirect( mBufferSize );
+	    		
+	    		LibUsb.fillBulkTransfer( transfer, 
+	    								 mDeviceHandle, 
+	    								 USB_ENDPOINT, 
+	    								 buffer, 
+	    								 BufferProcessor.this, 
+	    								 "Buffer #" + x,
+	    								 TIMEOUT_US );
+	    		
+	    		mTransfers.add( transfer );
+	    	}
+	    }
 	}
 
 	/**
-	 * Fetches received UsbIrp buffers from the received queue, dispatches them
+	 * Fetches byte[] chunks from the raw sample buffer.  Converts each byte
-	 * and resubmits the processed buffer for more samples
+	 * array and broadcasts the array to all registered listeners
 	 */
 	public class BufferDispatcher implements Runnable
 	{
 		@Override
         public void run()
         {
-			ArrayList<UsbIrp> buffers = new ArrayList<UsbIrp>();
+			ArrayList<byte[]> buffers = new ArrayList<byte[]>();
 			
-			mReceivedBuffers.drainTo( buffers );
+			mFilledBuffers.drainTo( buffers );
-			
+
-			for( UsbIrp buffer: buffers )
+			for( byte[] buffer: buffers )
 			{
-				Float[] samples = mSampleAdapter.convert( buffer.getData() );
+				//TODO: convert this to float primitive				
+				Float[] samples = mSampleAdapter.convert( buffer );
 				
 				broadcast( samples );
-				
-				if( mBufferProcessor != null && mBufferProcessor.isRunning() )
-				{
-					try
-		            {
-						/* We adjust the buffer size according to sample rate.
-						 * If this byte array matches the current buffer size
-						 * then we reuse the byte array, otherwise create a 
-						 * new one. */
-						if( buffer.getData().length == mBufferSize )
-						{
-			                mUSBPipe.asyncSubmit( buffer.getData() );
-						}
-						else
-						{
-			                mUSBPipe.asyncSubmit( new byte[ mBufferSize ] );
-						}
-		            }
-		            catch ( UsbNotActiveException | UsbNotOpenException
-		                    | IllegalArgumentException | UsbDisconnectedException
-		                    | UsbException e )
-		            {
-		            	mLog.error( "error submitting a byte array to the usb "
-		            			+ "pipe for samples", e );
-		            }
-				}
 			}
         }
 	}
+	
+	public static String getTransferStatus( int status )
+	{
+		switch( status )
+		{
+			case 0:
+				return "TRANSFER COMPLETED (0)";
+			case 1:
+				return "TRANSFER ERROR (1)";
+			case 2:
+				return "TRANSFER TIMED OUT (2)";
+			case 3:
+				return "TRANSFER CANCELLED (3)";
+			case 4:
+				return "TRANSFER STALL (4)";
+			case 5:
+				return "TRANSFER NO DEVICE (5)";
+			case 6:
+				return "TRANSFER OVERFLOW (6)";
+			default:
+				return "UNKNOWN TRANSFER STATUS (" + status + ")";
+		}
+	}
 }

src/source/tuner/rtl/RTL2832Tuner.java

@@ -20,10 +20,10 @@ package source.tuner.rtl;
 import java.util.concurrent.RejectedExecutionException;
 
 import javax.swing.JPanel;
-import javax.usb.UsbException;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.LibUsbException;
 
 import sample.Listener;
 import source.SourceException;
@@ -59,6 +59,11 @@ public class RTL2832Tuner extends Tuner
 		mController.addListener( (FrequencyChangeListener)this );
 	}
 	
+	public void dispose()
+	{
+		//TODO: dispose of something here
+	}
+	
 	public RTL2832TunerController getController()
 	{
 		return mController;
@@ -115,7 +120,7 @@ public class RTL2832Tuner extends Tuner
 		{
 			mController.setSampleRate( sampleRate );
 		}
-		catch( UsbException e )
+		catch( LibUsbException e )
 		{
 			throw new SourceException( "RTL2832 Tuner - error setting "
 					+ "sample rate", e );
@@ -139,7 +144,18 @@ public class RTL2832Tuner extends Tuner
     									    throws RejectedExecutionException,
     									    	   SourceException
 	{
-		return mController.getChannel( threadPoolManager, this, channel );
+		TunerChannelSource source = null;
+		
+		try
+		{
+			source = mController.getChannel( threadPoolManager, this, channel );
+		}
+		catch( Exception e )
+		{
+			mLog.error( "couldn't provide source channel", e );
+		}
+		
+		return source;
     }
 	/**
 	 * Releases the tuned channel so that the tuner controller can tune to

src/source/tuner/rtl/e4k/E4KTunerConfigurationPanel.java

@@ -46,6 +46,7 @@ import net.miginfocom.swing.MigLayout;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.LibUsbException;
 
 import source.SourceException;
 import source.tuner.TunerConfiguration;
@@ -258,7 +259,7 @@ public class E4KTunerConfigurationPanel extends JPanel
 					mSelectedConfig.setSampleRate( sampleRate );
 	                save();
                 }
-                catch ( SourceException | UsbException eSampleRate )
+                catch ( SourceException | LibUsbException eSampleRate )
                 {
                 	JOptionPane.showMessageDialog( 
                 			E4KTunerConfigurationPanel.this, 

src/source/tuner/rtl/e4k/E4KTunerController.java

@@ -17,37 +17,39 @@
  ******************************************************************************/
 package source.tuner.rtl.e4k;
 
+import java.util.Arrays;
+
 import javax.swing.JPanel;
 import javax.usb.UsbException;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.usb4java.Device;
+import org.usb4java.DeviceDescriptor;
+import org.usb4java.DeviceHandle;
+import org.usb4java.LibUsb;
+import org.usb4java.LibUsbException;
+
 import source.SourceException;
 import source.tuner.TunerConfiguration;
 import source.tuner.TunerType;
 import source.tuner.rtl.RTL2832TunerController;
-import source.tuner.usb.USBTunerDevice;
+import source.tuner.rtl.RTL2832TunerController.Descriptor;
 import controller.ResourceManager;
 
 public class E4KTunerController extends RTL2832TunerController
 {
-	/**
+	private final static Logger mLog = 
-	 * Note: E4K tuner max frequency range is 2200 MHz, but the 
+			LoggerFactory.getLogger( E4KTunerController.class );
-	 * max value that can be assigned to a signed integer is
+
-	 * 2147xxxxxx, so we constrain the E4K to the max integer value, for now
+	public static final long MIN_FREQUENCY = 52000000;
-	 * 
+	public static final long MAX_FREQUENCY = 2200000000l;
-	 * TODO: change frequency to a long primitive type
-	 */
-	public static final long sMIN_FREQUENCY = 52000000;
-	public static final long sMIN_FREQUENCY_EXTENDED = 52000000;
-	public static final long sMAX_FREQUENCY = 2200000000l;
-	public static final long sMAX_FREQUENCY_EXTENDED = 2200000000l;
-	public static final long sMIN_VCO = 2600000000l; //2.6 GHz
-	public static final long sMAX_VCO = 3900000000l; //3.9 GHz
 
 	/* The local oscillator is defined by whole (integer) units of the oscillator
 	 * frequency and fractional units representing 1/65536th of the oscillator
 	 * frequency, meaning we can only tune the local oscillator in units of 
 	 * 439.453125 hertz. */
-	public static final long sE4K_PLL_Y = 65536l; /* 16-bit fractional register */
+	public static final long E4K_PLL_Y = 65536l; /* 16-bit fractional register */
 	public static final byte MASTER1_RESET = (byte)0x01;
 	public static final byte MASTER1_NORM_STBY = (byte)0x02;
 	public static final byte MASTER1_POR_DET = (byte)0x04;
@@ -108,9 +110,11 @@ public class E4KTunerController extends RTL2832TunerController
 	
 	private E4KTunerEditorPanel mEditor;
 	
-	public E4KTunerController( USBTunerDevice device ) throws SourceException
+	public E4KTunerController( Device device, 
+							   DeviceDescriptor deviceDescriptor ) 
+									   throws SourceException
 	{
-		super( device, sMIN_FREQUENCY, sMAX_FREQUENCY );
+		super( device, deviceDescriptor, MIN_FREQUENCY, MAX_FREQUENCY );
 	}
 
 	@Override
@@ -166,24 +170,75 @@ public class E4KTunerController extends RTL2832TunerController
 
 	public void init() throws SourceException
 	{
+		mDeviceHandle = new DeviceHandle();
+		
+		int result = LibUsb.open( mDevice, mDeviceHandle );
+
+		if( result != LibUsb.SUCCESS )
+		{
+			mDeviceHandle = null;
+			
+			throw new SourceException( "libusb couldn't open RTL2832 usb "
+					+ "device [" + LibUsb.errorName( result ) + "]" );
+		}
+
+		claimInterface( mDeviceHandle );
+
+		byte[] eeprom = null;
+		
+		try
+		{
+			/* Read the contents of the 256-byte EEPROM */
+			eeprom = readEEPROM( mDeviceHandle, (short)0, 256 );
+		}
+		catch( Exception e )
+		{
+			mLog.error( "error while reading the EEPROM device descriptor", e );
+		}
+		
+		try
+		{
+			mDescriptor = new Descriptor( eeprom );
+
+			if( eeprom == null )
+			{
+				mLog.error( "eeprom byte array was null - constructed "
+						+ "empty descriptor object" );
+			}
+		}
+		catch( Exception e )
+		{
+			mLog.error( "error while constructing device descriptor using "
+				+ "descriptor byte array " + 
+				( eeprom == null ? "[null]" : Arrays.toString( eeprom )), e );
+		}
+
 		try
 		{
 			/* Dummy write to test USB interface */
-			writeRegister( mUSBDevice, Block.USB, 
+			writeRegister( mDeviceHandle, Block.USB, 
 					Address.USB_SYSCTL.getAddress(), (short)0x09, 1 );
 
-			initBaseband( mUSBDevice );
+			initBaseband( mDeviceHandle );
 
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 			
 			boolean i2CRepeaterControl = false;
 			
 			initTuner( i2CRepeaterControl );
 
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 			
-			/* Initialize the super class */
+			try
-			super.init();
+			{
+				setSampleRate( DEFAULT_SAMPLE_RATE );
+			}
+			catch( Exception e )
+			{
+				throw new SourceException( "RTL2832 Tuner Controller - couldn't "
+					+ "set default sample rate", e );
+			}
+
 		}
 		catch( UsbException e )
 		{
@@ -208,14 +263,14 @@ public class E4KTunerController extends RTL2832TunerController
 	 * for the selected bandwidth/sample rate
 	 */
 	@Override
-    public void setSampleRateFilters( int bandwidth ) throws UsbException
+    public void setSampleRateFilters( int bandwidth ) throws SourceException
     {
 		/* Determine repeater state so we can restore it when done */
 		boolean i2CRepeaterEnabled = isI2CRepeaterEnabled();
 
 		if( !i2CRepeaterEnabled )
 		{
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 		}
 
 		boolean controlI2CRepeater = false;
@@ -231,7 +286,7 @@ public class E4KTunerController extends RTL2832TunerController
 
 		if( !i2CRepeaterEnabled )
 		{
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 		}
     }
 
@@ -245,7 +300,7 @@ public class E4KTunerController extends RTL2832TunerController
 
 			if( !i2CRepeaterEnabled )
 			{
-				enableI2CRepeater( mUSBDevice, true );
+				enableI2CRepeater( mDeviceHandle, true );
 			}
 
 			boolean controlI2CRepeater = false;
@@ -263,12 +318,12 @@ public class E4KTunerController extends RTL2832TunerController
 			/* Return the repeater to its previous state */
 			if( !i2CRepeaterEnabled )
 			{
-				enableI2CRepeater( mUSBDevice, false );
+				enableI2CRepeater( mDeviceHandle, false );
 			}
 
 			return calculateActualFrequency( pll, z, x );
 		}
-		catch( UsbException e )
+		catch( LibUsbException e )
 		{
 			throw new SourceException( "E4K tuner controller - couldn't get "
 					+ "tuned frequency", e );
@@ -291,7 +346,7 @@ public class E4KTunerController extends RTL2832TunerController
 		int remainder = (int)( frequency - ( ( z & 0xFF ) * pll.getScaledOscillator() ) );
 
 		/* X is a 16-bit representation of the remainder */
-		int x = (int)( (double)remainder / (double)pll.getScaledOscillator() * sE4K_PLL_Y );
+		int x = (int)( (double)remainder / (double)pll.getScaledOscillator() * E4K_PLL_Y );
 
 		/* Calculate the exact (tunable) frequency and apply that to the tuner */
 		long actualFrequency = calculateActualFrequency( pll, z, x );
@@ -310,7 +365,7 @@ public class E4KTunerController extends RTL2832TunerController
 		/* Apply the actual frequency */
 		try
 		{
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 
 			boolean controlI2CRepeater = false;
 			
@@ -341,10 +396,10 @@ public class E4KTunerController extends RTL2832TunerController
 			{
 				throw new SourceException( "E4K tuner controller - couldn't "
 						+ "achieve PLL lock for frequency [" + 
-						actualFrequency + "]" );
+						actualFrequency + "] lock value [" + lock + "]" );
 			}
 			
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 		}
 		catch( UsbException e )
 		{
@@ -358,7 +413,7 @@ public class E4KTunerController extends RTL2832TunerController
 		long whole = pll.getScaledOscillator() * ( z & 0xFF );
 
 		int fractional = (int)( pll.getScaledOscillator() * 
-								( (double)x / (double)sE4K_PLL_Y ) );
+								( (double)x / (double)E4K_PLL_Y ) );
 
 		return whole + fractional;
 	}
@@ -367,7 +422,7 @@ public class E4KTunerController extends RTL2832TunerController
 	{
 		if( controlI2CRepeater )
 		{
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 		}
 		
 		boolean i2CRepeaterControl = false;
@@ -473,7 +528,7 @@ public class E4KTunerController extends RTL2832TunerController
 		
 		if( controlI2CRepeater )
 		{
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 		}
 	}
 	
@@ -484,7 +539,7 @@ public class E4KTunerController extends RTL2832TunerController
 		
 		if( controlI2CRepeater )
 		{
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 		}
 		
 		/* Capture current gain settings to reapply at the end */
@@ -548,7 +603,7 @@ public class E4KTunerController extends RTL2832TunerController
 		
 		if( controlI2CRepeater )
 		{
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 		}
 	}
 	
@@ -584,7 +639,7 @@ public class E4KTunerController extends RTL2832TunerController
 	{
     	if( controlI2CRepeater )
     	{
-    		enableI2CRepeater( mUSBDevice, true );
+    		enableI2CRepeater( mDeviceHandle, true );
     	}
     	
     	if( gain == E4KLNAGain.AUTOMATIC )
@@ -610,7 +665,7 @@ public class E4KTunerController extends RTL2832TunerController
     	
     	if( controlI2CRepeater )
     	{
-    		enableI2CRepeater( mUSBDevice, false );
+    		enableI2CRepeater( mDeviceHandle, false );
     	}
 	}
     
@@ -661,7 +716,7 @@ public class E4KTunerController extends RTL2832TunerController
 	{
 		if( controlI2CRepeater )
 		{
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 		}
 		
 		boolean localI2CRepeaterControl = false;
@@ -689,7 +744,7 @@ public class E4KTunerController extends RTL2832TunerController
 		
 		if( controlI2CRepeater )
 		{
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 		}
 	}
 	
@@ -810,7 +865,7 @@ public class E4KTunerController extends RTL2832TunerController
 	}
 	
     public void setMixerFilter( MixerFilter filter, 
-    							boolean controlI2CRepeater ) throws UsbException
+    							boolean controlI2CRepeater ) throws LibUsbException
 	{
 		writeMaskedE4KRegister( MixerFilter.getRegister(), 
 								MixerFilter.getMask(), 
@@ -828,7 +883,7 @@ public class E4KTunerController extends RTL2832TunerController
 	}
 	
     public void setRCFilter( RCFilter filter, 
-    						 boolean controlI2CRepeater ) throws UsbException
+    						 boolean controlI2CRepeater ) throws LibUsbException
 	{
 		writeMaskedE4KRegister( RCFilter.getRegister(), 
 								RCFilter.getMask(), 
@@ -844,7 +899,7 @@ public class E4KTunerController extends RTL2832TunerController
 	}
 	
     public void setChannelFilter( ChannelFilter filter, 
-    							  boolean controlI2CRepeater ) throws UsbException
+    							  boolean controlI2CRepeater ) throws LibUsbException
 	{
 		writeMaskedE4KRegister( ChannelFilter.getRegister(), 
 								ChannelFilter.getMask(), 
@@ -885,7 +940,7 @@ public class E4KTunerController extends RTL2832TunerController
     {
     	if( controlI2CRepeater )
     	{
-    		enableI2CRepeater( mUSBDevice, true );
+    		enableI2CRepeater( mDeviceHandle, true );
     	}
 
     	Band band = Band.fromFrequency( frequency );
@@ -914,7 +969,7 @@ public class E4KTunerController extends RTL2832TunerController
 
     	if( controlI2CRepeater )
     	{
-    		enableI2CRepeater( mUSBDevice, false );
+    		enableI2CRepeater( mDeviceHandle, false );
     	}
     }
     
@@ -946,7 +1001,7 @@ public class E4KTunerController extends RTL2832TunerController
     	{
 			if( controlI2CRepeater )
 			{
-				enableI2CRepeater( mUSBDevice, true );
+				enableI2CRepeater( mDeviceHandle, true );
 			}
 
 			boolean i2CRepeaterControl = false;
@@ -957,7 +1012,7 @@ public class E4KTunerController extends RTL2832TunerController
 
     		if( controlI2CRepeater )
     		{
-    			enableI2CRepeater( mUSBDevice, false );
+    			enableI2CRepeater( mDeviceHandle, false );
     		}
     	}
     }
@@ -969,7 +1024,7 @@ public class E4KTunerController extends RTL2832TunerController
 	{
 		if( controlI2CRepeater )
 		{
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 		}
 
 		writeE4KRegister( Register.MAGIC_1, (byte)0x01, false );
@@ -983,7 +1038,7 @@ public class E4KTunerController extends RTL2832TunerController
 
 		if( controlI2CRepeater )
 		{
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 		}
 	}
 	
@@ -999,7 +1054,7 @@ public class E4KTunerController extends RTL2832TunerController
 	private void writeMaskedE4KRegister( Register register, 
 										 byte mask, 
 										 byte value,
-										 boolean controlI2CRepeater ) throws UsbException
+										 boolean controlI2CRepeater ) throws LibUsbException
 	{
 		int temp = readE4KRegister( register, controlI2CRepeater );
 
@@ -1009,22 +1064,24 @@ public class E4KTunerController extends RTL2832TunerController
 			writeE4KRegister( register, 
 							  (byte)( ( temp & ~mask ) | ( value & mask ) ), 
 							  controlI2CRepeater );
+			
+			int temp2 = readE4KRegister( register, controlI2CRepeater );
 		}
 	}
 	
 	private int readE4KRegister( Register register, 
-			 boolean controlI2CRepeater ) throws UsbException
+			 boolean controlI2CRepeater ) throws LibUsbException
 	{
-		return readI2CRegister( mUSBDevice, Register.I2C_REGISTER.getValue(), 
+		return readI2CRegister( mDeviceHandle, Register.I2C_REGISTER.getValue(), 
 						register.getValue(), controlI2CRepeater );
 	}
 
 
 	private void writeE4KRegister( Register register, 
 								   byte value,
-								   boolean controlI2CRepeater ) throws UsbException
+								   boolean controlI2CRepeater ) throws LibUsbException
 	{
-		writeI2CRegister( mUSBDevice, Register.I2C_REGISTER.getValue(), 
+		writeI2CRegister( mDeviceHandle, Register.I2C_REGISTER.getValue(), 
 						  register.getValue(), value, controlI2CRepeater );
 	}
 

src/source/tuner/rtl/r820t/R820TTunerConfigurationPanel.java

@@ -46,6 +46,7 @@ import net.miginfocom.swing.MigLayout;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.LibUsbException;
 
 import source.SourceException;
 import source.tuner.TunerConfiguration;
@@ -252,7 +253,7 @@ public class R820TTunerConfigurationPanel extends JPanel
 					mSelectedConfig.setSampleRate( sampleRate );
 	                save();
                 }
-                catch ( SourceException | UsbException eSampleRate )
+                catch ( SourceException | LibUsbException eSampleRate )
                 {
                 	JOptionPane.showMessageDialog( 
                 			R820TTunerConfigurationPanel.this, 
@@ -308,7 +309,7 @@ public class R820TTunerConfigurationPanel extends JPanel
 	                {
 		                mController.setSampleRateFrequencyCorrection( value );
 	                }
-	                catch ( SourceException | UsbException e1 )
+	                catch ( SourceException | LibUsbException e1 )
 	                {
 	                	JOptionPane.showMessageDialog( 
 	                			R820TTunerConfigurationPanel.this, 

src/source/tuner/rtl/r820t/R820TTunerController.java

@@ -22,17 +22,21 @@
  ******************************************************************************/
 package source.tuner.rtl.r820t;
 
+import java.nio.ByteBuffer;
+
 import javax.swing.JPanel;
 import javax.usb.UsbException;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.usb4java.Device;
+import org.usb4java.DeviceDescriptor;
+import org.usb4java.LibUsbException;
 
 import source.SourceException;
 import source.tuner.TunerConfiguration;
 import source.tuner.TunerType;
 import source.tuner.rtl.RTL2832TunerController;
-import source.tuner.usb.USBTunerDevice;
 import controller.ResourceManager;
 
 public class R820TTunerController extends RTL2832TunerController
@@ -68,9 +72,11 @@ public class R820TTunerController extends RTL2832TunerController
 	
 	private JPanel mEditor;
 	
-	public R820TTunerController( USBTunerDevice device ) throws SourceException
+	public R820TTunerController( Device device, 
+								 DeviceDescriptor deviceDescriptor ) 
+										 throws SourceException
 	{
-	    super( device, MIN_FREQUENCY, MAX_FREQUENCY );
+	    super( device, deviceDescriptor, MIN_FREQUENCY, MAX_FREQUENCY );
 	}
 
 	@Override
@@ -80,7 +86,7 @@ public class R820TTunerController extends RTL2832TunerController
     }
 	
 	@Override
-    public void setSampleRateFilters( int sampleRate ) throws UsbException
+    public void setSampleRateFilters( int sampleRate ) throws LibUsbException
     {
 		//TODO: why is this being forced as an abstract method on sub classes?
     }
@@ -155,7 +161,7 @@ public class R820TTunerController extends RTL2832TunerController
     {
 		try
 		{
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 
 			boolean controlI2C = false;
 			
@@ -165,7 +171,7 @@ public class R820TTunerController extends RTL2832TunerController
 			
 			setPLL( offsetFrequency, controlI2C );
 
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 		}
 		catch( UsbException e )
 		{
@@ -179,7 +185,7 @@ public class R820TTunerController extends RTL2832TunerController
 	 * Overrides the same method from the RTL2832 tuner controller to apply 
 	 * settings specific to the R820T tuner.
 	 */
-	public void setSamplingMode( SampleMode mode ) throws UsbException
+	public void setSamplingMode( SampleMode mode ) throws LibUsbException
 	{
 		switch( mode )
 		{
@@ -188,14 +194,14 @@ public class R820TTunerController extends RTL2832TunerController
 				setIFFrequency( R820T_IF_FREQUENCY );
 
 				/* Enable spectrum inversion */
-				writeDemodRegister( mUSBDevice, 
+				writeDemodRegister( mDeviceHandle, 
 									Page.ONE, 
 									(short)0x15, 
 									(short)0x01, 
 									1 );
 				
 				/* Set default i/q path */
-				writeDemodRegister( mUSBDevice, 
+				writeDemodRegister( mDeviceHandle, 
 									Page.ZERO, 
 									(short)0x06, 
 									(short)0x80, 
@@ -239,18 +245,16 @@ public class R820TTunerController extends RTL2832TunerController
 	 */
 	public void init() throws SourceException
 	{
+		/* Initialize the super class to open and claim the usb interface*/
+		super.init();
+		
 		try
 		{
-			mLog.debug( "testing USB interface" );
-			/* Dummy write to test USB interface */
-			writeRegister( mUSBDevice, Block.USB, 
-					Address.USB_SYSCTL.getAddress(), (short)0x09, 1 );
-
 			mLog.debug( "initializing RTL2832 tuner baseband" );
-			initBaseband( mUSBDevice );
+			initBaseband( mDeviceHandle );
 
 			mLog.debug( "enabling I2C repeater" );
-			enableI2CRepeater( mUSBDevice, true );
+			enableI2CRepeater( mDeviceHandle, true );
 			
 			boolean i2CRepeaterControl = false;
 			
@@ -258,11 +262,9 @@ public class R820TTunerController extends RTL2832TunerController
 			initTuner( i2CRepeaterControl );
 
 			mLog.debug( "disabling I2C repeater" );
-			enableI2CRepeater( mUSBDevice, false );
+			enableI2CRepeater( mDeviceHandle, false );
 			
 			mLog.debug( "initializing RTL2832 tuner controller super class" );
-			/* Initialize the super class */
-			super.init();
 		}
 		catch( UsbException e )
 		{
@@ -276,14 +278,14 @@ public class R820TTunerController extends RTL2832TunerController
 	public void initTuner( boolean controlI2C ) throws UsbException
 	{
 		/* Disable zero IF mode */
-		writeDemodRegister( mUSBDevice, 
+		writeDemodRegister( mDeviceHandle, 
 							Page.ONE, 
 							(short)0xB1, 
 							(short)0x1A, 
 							1 );
 		
 		/* Only enable in-phase ADC input */
-		writeDemodRegister( mUSBDevice, 
+		writeDemodRegister( mDeviceHandle, 
 							Page.ZERO, 
 							(short)0x08, 
 							(short)0x4D, 
@@ -293,7 +295,7 @@ public class R820TTunerController extends RTL2832TunerController
 		setIFFrequency( R820T_IF_FREQUENCY );
 
 		/* Enable spectrum inversion */
-		writeDemodRegister( mUSBDevice, 
+		writeDemodRegister( mDeviceHandle, 
 							Page.ONE, 
 							(short)0x15, 
 							(short)0x01, 
@@ -570,7 +572,7 @@ public class R820TTunerController extends RTL2832TunerController
 	{
 	    for( int x = 5; x < mShadowRegister.length; x++ )
 	    {
-	        writeI2CRegister( mUSBDevice, 
+	        writeI2CRegister( mDeviceHandle, 
 	                          mI2CAddress,
 	                          (byte)x,
 	                          (byte)mShadowRegister[ x ],
@@ -583,11 +585,11 @@ public class R820TTunerController extends RTL2832TunerController
 	 */
 	private int getStatusRegister( int register, boolean controlI2C ) throws UsbException
 	{
-		byte[] data = new byte[ 5 ];
+		ByteBuffer buffer = ByteBuffer.allocateDirect( 5 );
 		
-		byte[] statusRegisters = read( mUSBDevice, Block.IIC, mI2CAddress, data );
+		read( mDeviceHandle, mI2CAddress, Block.I2C, buffer );
 
-		return bitReverse( statusRegisters[ register ] & 0xFF );
+		return bitReverse( buffer.get( register ) & 0xFF );
 	}
 	
 	/**
@@ -615,7 +617,7 @@ public class R820TTunerController extends RTL2832TunerController
 	                        ( value & register.getMask() ) );
 	    }
 
-        writeI2CRegister( mUSBDevice, mI2CAddress, 
+        writeI2CRegister( mDeviceHandle, mI2CAddress, 
                 (byte)register.getRegister(), value, controlI2C );
 
         mShadowRegister[ register.getRegister() ] = value;
@@ -631,7 +633,7 @@ public class R820TTunerController extends RTL2832TunerController
 	public int readR820TRegister( Register register, boolean controlI2C )
 	                    throws UsbException
 	{
-		int value = readI2CRegister( mUSBDevice, 
+		int value = readI2CRegister( mDeviceHandle, 
 	                            mI2CAddress, 
 	                            (byte)register.getRegister(), 
 	                            controlI2C );