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/grabber/OsxFrameGrabberMock.h

@@ -0,0 +1,34 @@
+#pragma once
+#ifndef __APPLE__
+
+/*
+ * this is a mock up for compiling and testing osx wrapper on no osx platform.
+ * this will show a test image and rotate the colors.
+ * 
+ */
+
+#include <utils/Image.h>
+#include <utils/ColorRgb.h>
+
+typedef int CGDirectDisplayID;
+typedef Image<ColorRgb> CGImage;
+typedef CGImage* CGImageRef;
+typedef unsigned char CFData;
+typedef CFData* CFDataRef;
+typedef unsigned CGDisplayCount;
+
+const int kCGDirectMainDisplay = 0;
+
+void           CGGetActiveDisplayList(int max, CGDirectDisplayID *displays, CGDisplayCount *displayCount);
+CGImageRef     CGDisplayCreateImage(CGDirectDisplayID display);
+void           CGImageRelease(CGImageRef image);
+CGImageRef     CGImageGetDataProvider(CGImageRef image);
+CFDataRef      CGDataProviderCopyData(CGImageRef image);
+unsigned char* CFDataGetBytePtr(CFDataRef imgData);
+unsigned       CGImageGetWidth(CGImageRef image);
+unsigned       CGImageGetHeight(CGImageRef image);
+unsigned       CGImageGetBitsPerPixel(CGImageRef image);
+unsigned       CGImageGetBytesPerRow(CGImageRef image);
+void           CFRelease(CFDataRef imgData);
+
+#endif