ref: 01a37177d167f2f837ae6d2de03a17511d1b38c9
parent: 8b810c7a78cbaac715cc516973de2bfdbf4067f9
author: Jingning Han <jingning@google.com>
date: Tue Aug 20 10:34:17 EDT 2013
Refactor rd_pick_partition for parameter control This commit changes the partition search order of superblocks from {SPLIT, NONE, HORZ, VERT} to {NONE, SPLIT, HORZ, VERT} for consistency with that of sub8x8 partition search. It enable the use of early termination in partition search for all block sizes. For ped_area_1080p 50 frames coded at 4000 kbps, it makes the runtime goes down from 844305ms -> 818003ms (3% speed-up) at speed 0. This will further move towards making the in-search partition types configurable, hence unifying various speed-up approaches. Some speed 1 and 2 features are turned off during the refactoring process, including: disable_split_var_thresh using_small_partition_info Stricter constraints are applied to use_square_partition_only for right/bottom boundary blocks. Will bring back/refine these features subsequently. At this point, it makes derf set at speed 1 about 0.45% higher in compression performance, and 9% down in run-time. Change-Id: I3db9f9d1d1a0d6cbe2e50e49bd9eda1cf705f37c