The final parameter of check_available determines whether the motion
estimation region constraints imposed in section 8.5.2.3 of H.266 (V3)
on MVP candidates apply to the current candidate or not. In the case of
IBC spatial merge candidates they do not, as their availability is
dependent only on the criteria described in sections 8.6.2.3 and 6.4.4,
which do not include this constraint on the motion estimation region.
Signed-off-by: Frank Plowman <post@frankplowman.com>
From H.266 (V3) (09/2023) p. 321:
It is a requirement of bitstream conformance that the luma block
vector bvL shall obey the following constraints:
- CtbSizeY is greater than or equal to
((yCb + (bvL[ 1 ] >> 4)) & (CtbSizeY − 1)) + cbHeight
This patch checks this is true, which fixes crashes on fuzzed
bitstreams.
Signed-off-by: Frank Plowman <post@frankplowman.com>
This might not be needed for correctness but it could
help general reproducability of issues
Related to: CID1560037 Uninitialized scalar variable
Related to: CID1560044 Uninitialized scalar variable
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
A namespace is unnecessary here given that all these files
are already in the vvc subfolder.
Reviewed-by: Nuo Mi <nuomi2021@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
