question: public void addListener ( Listener < ComplexBuffer > listener ) { synchronized ( mComplexBufferBroadcaster ) { mComplexBufferBroadcaster . addListener ( listener ) ; if ( mBufferProcessor == null || ! mBufferProcessor . isRunning ( ) ) { mBufferProcessor = new BufferProcessor ( ) ; Thread thread = new Thread ( mBufferProcessor ) ; thread . setDaemon ( true ) ; thread . setName ( "HackRF Sample Processor" ) ; thread . start ( ) ; } } }
target:  Adds a sample listener.  If the buffer processing thread is not currently running, starts it running in a new thread.