commit 3e85f67f34864dfe1625503d50213190acd4b60a
author Sarah Parker <sarahparker@google.com> Thu Jun 15 09:04:32 2017 -0700
committer Sarah Parker <sarahparker@google.com> Fri Jun 16 19:22:45 2017 +0000
tree 1605dd90da0b1ac65f3375e52bc090a8ad856bec
parent bfbf6a5983bc56bb27de8f7d46d7b22d74131719

Make gm refinement step go all the way down to 1

-0.242% gain on cam_lowres

Change-Id: Ib9ba2f7dfc7d10b8066bd3f70eeafa7faac8a607

av1/encoder/global_motion.c

diff --git a/av1/encoder/global_motion.c b/av1/encoder/global_motion.c
index da1e403..116b815 100644
--- a/av1/encoder/global_motion.c
+++ b/av1/encoder/global_motion.c
@@ -156,7 +156,7 @@
                               d_width - 2 * border, d_height - 2 * border,
                               d_stride, 0, 0, 16, 16, best_frame_error);
   best_error = AOMMIN(best_error, best_frame_error);
-  step = 1 << (n_refinements + 1);
+  step = 1 << (n_refinements - 1);
   for (i = 0; i < n_refinements; i++, step >>= 1) {
     for (p = 0; p < n_params; ++p) {
       int step_dir = 0;