ref: d78dbff09a1b3166fdd5be07b5227179e6e2dfcb
parent: cfc337aae8dabc2e4e1af28506d58230dc9de5c3
author: Deb Mukherjee <debargha@google.com>
date: Mon Oct 6 22:48:08 EDT 2014
Subpel search cleanups and enhancements - Some fixes to surface fit. - Returns variance function as cost rather than sad in the pattern search and diamond search functions. Only vp9_pattern_search_sad function used in bigdia search uses sad as integer 1-away costs. - Deploys SUBPEL_TREE_PRUNED_MORE for speed 4+. Results: derf [Speed 3]: About +0.036% in coding efficiency without any discernible speed loss. derf [Speed 4]: About 2-3% faster at -0.199% loss in coding efficiency. derf [Speed 5]: About 3-4% faster at -0.149% loss in coding efficiency. Change-Id: I8462f94f6adb46966ca964f2bd0400977357fd63