JVET-Z0105: Virtual boundary handling for new In-loop filter tools of ECM

(JVET-Z0105) Virtual Boundary handling for new In-loop filter tools of ECM

Combination with JVET-Z0118 (GDR) implementation was also tested and no leaks were observed. BD-Rate performance of Z0118 (GDR) with Z0105 VB handling is as follows:

Anchor: Z0118 GDR + Z0118 VB handling

Test: Z0118 GDR + Z0105 VB handling

Low delay B Main10
	Over ECM-4.0
	Y	U	V	EncT	DecT
Class A1
Class A2
Class B	#VALUE!	#VALUE!	#VALUE!	#DIV/0!	#DIV/0!
Class C	-0.04%	0.06%	0.23%	83%	100%
Class E	#VALUE!	#VALUE!	#VALUE!	#NUM!	#NUM!
Overall	#VALUE!	#VALUE!	#VALUE!	#DIV/0!	#DIV/0!
Class D	-0.03%	-0.17%	-0.21%	95%	104%
Class F	#VALUE!	#VALUE!	#VALUE!	#DIV/0!	#DIV/0!
Class TGM	#VALUE!	#VALUE!	#VALUE!	#DIV/0!	#DIV/0!