vp3: zero allocated tables

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavfi/geq: add aliases for RGB options
lavfi/geq: prefer symbolic constants

Hopefully enhance readability.
j2kdec: s/decode_packets/jpeg2000_decode_packets/

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
j2k: Rename structs to be more similar to jpeg2000dec

This should simplify merging

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/j2k: rename J2K_ constants to JPEG2000_

This should simplify merging the 2 decoders

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
jpeg2000dec: Check ncomponents and tile dimensions

Fixes various problems

Code ported from j2kdec

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>