MF-grabber: Add support for bottom-up image handling (#1752)

* prepare bottom-up image handling

* add default stride handling, code cleaning

* fix code

* move whole logic to MF-grabber

* minor fix

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Co-authored-by: Thinner77 <none>

include/grabber/video/mediafoundation/MFGrabber.h

@@ -46,6 +46,7 @@ public:
 		int numerator	= 0;
 		int denominator = 0;
 		PixelFormat pf	= PixelFormat::NO_CHANGE;
+		long defstride  = 0;
 		GUID guid		= GUID_NULL;
 	};