Inconsistent output with weightp caused by f851138520c7 commit

[Mahesh Pittala]

Tested tip: 1.8+167-e951ab673b1c build info: [Windows][MSVC 1700][64 bit][CHECKED] 10bit First bad commit: f851138520c7

CLI: DucksAndLegs_1920x1080_60_10bit_422.yuv --no-info --hash=1 --psnr --ssim --input-res 1920x1080 --fps 60 --input-depth 10 --input-csp i422 -o out.hevc --preset medium

encoder log - http://pastie.org/10639272

[Mahesh Pittala]

Issue #221 was marked as a duplicate of this issue.

[Kavitha Sampath]

The inconsistency in output with weightp is due to threading in lookahead slices. When a reference frame is weighted in the lookahead, not all lookahead slice threads of the reference have the weighted flag set. Some slices of the reference frame are weighted and remaining slices are unweighted leading to inconsistent output. The issue is fixed and is under testing now.

[Deepthi Nandakumar]

weightp: fix output inconsistency due to threading in lookahead (fixes #220)

→ <<cset 84c9dfa130b6>>