grabber api and feature unification (#462)

* move setvideomode to common place

* implement more croping and 3d support

* more api unification

* more refactoring

* osx fix

* next step

* add a mock for osx grabber. Now it is possible to test compile on none osx platforms.

* more unifications ...

* remove obsolete includes and grabbers are not dyn allocated. dispmanx needs rework an probaly not work atm

* first version of dispmanx mock. it compiles, but outputs a black image

* now dispmanx mock works!

* activate mocks in travis linux build
prepare dispmanx to rgb image out

* dispmanx now with image rgb output
fix deadlock with w/h -1 in grabber v4l
cleanups

* fix json

* fix some runtime stuff

* Update FramebufferWrapper.cpp

fix missing code

* unify grabframe

* 3d and croping for amlogic

* fix setimage not working

* make use of templates
save some codelines

* save more code lines

include/hyperion/Grabber.h

@@ -3,6 +3,7 @@
 #include <QObject>
 #include <cstdint>
 
+#include <utils/ColorRgb.h>
 #include <utils/Image.h>
 #include <utils/VideoMode.h>
 #include <utils/GrabbingMode.h>
@@ -16,24 +17,28 @@ class Grabber : public QObject
 
 public:
 	Grabber(QString grabberName, int width=0, int height=0, int cropLeft=0, int cropRight=0, int cropTop=0, int cropBottom=0);
-	~Grabber();
-	
+	virtual ~Grabber();
+
 	///
 	/// Set the video mode (2D/3D)
 	/// @param[in] mode The new video mode
 	///
-	void setVideoMode(VideoMode mode);
+	virtual void setVideoMode(VideoMode mode);
 
+	virtual void setCropping(unsigned cropLeft, unsigned cropRight, unsigned cropTop, unsigned cropBottom);
+	
 	/// gets resulting height of image
-	const int getImageWidth() { return _width; };
+	virtual const int getImageWidth() { return _width; };
 
 	/// gets resulting width of image
-	const int getImageHeight() { return _height; };
+	virtual const int getImageHeight() { return _height; };
 
 
 protected:
 	ImageResampler _imageResampler;
 
+	bool _useImageResampler;
+	
 	/// the selected VideoMode
 	VideoMode    _videoMode;