enable components at runtime + grabber refactoring (#160)

* implement enable/disable on runtime for:
- smoothing
- kodi
- udplistener
- boblight

* implement enable/disable for forwarder
refactor component

* - implement grabber enable/disable at runtime
- big grabber refactoring. now with common base class for all grabbers

* implement enable/disable at runtime for bb detector

* osx fix

* try to fix cutted travis output for osx build

include/grabber/V4L2Wrapper.h

@@ -1,16 +1,14 @@
 #pragma once
 
-// Qt includes
-#include <QTimer>
-
 // Hyperion includes
 #include <hyperion/Hyperion.h>
 #include <hyperion/ImageProcessor.h>
+#include <hyperion/GrabberWrapper.h>
 
 // Grabber includes
 #include <grabber/V4L2Grabber.h>
 
-class V4L2Wrapper : public QObject
+class V4L2Wrapper : public GrabberWrapper
 {
 	Q_OBJECT
 
@@ -26,7 +24,7 @@ public:
 			double redSignalThreshold,
 			double greenSignalThreshold,
 			double blueSignalThreshold,
-			int hyperionPriority);
+			const int priority);
 	virtual ~V4L2Wrapper();
 
 public slots:
@@ -41,34 +39,22 @@ public slots:
 
 	void set3D(VideoMode mode);
 
-signals:
-	void emitColors(int priority, const std::vector<ColorRgb> &ledColors, const int timeout_ms);
-	void emitImage(int priority, const Image<ColorRgb> & image, const int timeout_ms);
+// signals:
+// 	void emitColors(int priority, const std::vector<ColorRgb> &ledColors, const int timeout_ms);
 
 private slots:
 	void newFrame(const Image<ColorRgb> & image);
 
+	virtual void action();
 	void checkSources();
 
 private:
 	/// The timeout of the led colors [ms]
 	const int _timeout_ms;
 
-	/// The priority of the led colors
-	const int _priority;
-
 	/// The V4L2 grabber
 	V4L2Grabber _grabber;
 
-	/// The processor for transforming images to led colors
-	ImageProcessor * _processor;
-
-	/// The Hyperion instance
-	Hyperion * _hyperion;
-
 	/// The list with computed led colors
 	std::vector<ColorRgb> _ledColors;
-
-	/// Timer which tests if a higher priority source is active
-	QTimer _timer;
 };