tree 8a376f56edf01c6c4a1226977c90d2b8cc5793e0
parent 9100073e8d99f2cf1b0b2d2288687d193295addf
author Yunqing Wang <yunqingwang@google.com> 1284660532 -0400
committer Yunqing Wang <yunqingwang@google.com> 1284731765 -0400

Restructure multi-threaded decoder

On each MB, loopfiltering is done right after MB decoding. This
combines two loops in multi-threaded code into one, which reduces
number of synchronizations to half.

The above-row/left-col data are saved in temp buffers for
next-row/next MB decoding.

Tests on 4-core gLucid machine showed 10% decoder performance
gain with threads=4 (tulip clip). Testing on other platforms
isn't done yet.

Change-Id: Id18ea7c1e84965dabea65d4c01ca5bc056ddeac9