Initial commit of redesigned internal processing and audio management.

Note: Several of the decoders are currently non-functioning in this
commit.  If you want the latest functioning codebase, please checkout
the commit prior to this one.  All decoders will eventually be updated
with this new architecture.

Currently broken:
- Logging and recording
- Aux decoders (Fleetsync/MDC/LoJack/Tait)
- LTR/Passport decoders

Changes in this commit:
- Module architecture for decoders and components with central
provisioning by the DecoderFactory
- Transition from Complex sample stream processing to float buffer
processing for improved memory management
- Redesigned filter structures - to support buffers and streams
- Resolved several memory leak issues
- Universal sharing of the thread pool manager
- Added centralized audio management with call/user prioritization and
new gui with mute/volume controls
- Embedded audio metadata for eventual streaming support
- Redesigned ProcessingChain to support independent re-use
- Added new TrafficChannelManager to handle traffic channel allocations
- Traffic Channel pool size and Call timeout available in P25 and
MPT1327 configs
- Redesigned channel and decoder gui components

src/audio/AudioPacket.java

@@ -1,29 +1,34 @@
 package audio;
 
+import audio.metadata.AudioMetadata;
+
 public class AudioPacket
 {
-	private String mSource;
 	private Type mType;
-	private byte[] mAudioData;
-	private int mPriority;
+	private float[] mAudioData;
+	private AudioMetadata mAudioMetadata;
 	
-	public AudioPacket( String source, Type type )
+	public AudioPacket( Type type )
 	{
-		mSource = source;
 		mType = type;
 	}
 	
-	public AudioPacket( String source, byte[] audio, int priority )
+	public AudioPacket( float[] audio, AudioMetadata metadata )
 	{
-		this( source, Type.AUDIO );
+		this( Type.AUDIO );
 
 		mAudioData = audio;
-		mPriority = priority;
+		mAudioMetadata = metadata;
 	}
 	
-	public String getSource()
+	public AudioMetadata getMetadata()
 	{
-		return mSource;
+		return mAudioMetadata;
+	}
+	
+	public void setMetadata( AudioMetadata metadata )
+	{
+		mAudioMetadata = metadata;
 	}
 	
 	public Type getType()
@@ -31,16 +36,11 @@ public class AudioPacket
 		return mType;
 	}
 	
-	public byte[] getAudioData()
+	public float[] getAudioData()
 	{
 		return mAudioData;
 	}
 	
-	public int getPriority()
-	{
-		return mPriority;
-	}
-
 	public enum Type
 	{
 		AUDIO,