commit b3c189b98880b4e55224c94b98d72ec65392b028
author Jingning Han <jingning@google.com> Sun Sep 17 08:19:11 2017 -0700
committer Jingning Han <jingning@google.com> Wed Sep 20 20:08:09 2017 +0000
tree 3c4555cb5d9b2bd8bf0d641bda105c8b7643692c
parent 24d2d5dbf78e87bb4e2192c0308b534581144337

Customize prob model control for lv-map

Make the probability model update system better customized for the
level map coding scheme. This improves the level map coding
performance by 0.2% for lowres and 0.1% for midres.

Change-Id: Ib6d3abb36d50ff7485c4ceb411fe94e8fb060416

aom_dsp/prob.h

diff --git a/aom_dsp/prob.h b/aom_dsp/prob.h
index cc39b05..a4f6307 100644
--- a/aom_dsp/prob.h
+++ b/aom_dsp/prob.h
@@ -153,7 +153,11 @@
 void av1_indices_from_tree(int *ind, int *inv, const aom_tree_index *tree);
 
 static INLINE void update_cdf(aom_cdf_prob *cdf, int val, int nsymbs) {
-  const int rate = 4 + (cdf[nsymbs] > 31) + get_msb(nsymbs);
+  int rate = 4 + (cdf[nsymbs] > 31) + get_msb(nsymbs);
+#if CONFIG_LV_MAP
+  if (nsymbs == 2)
+    rate = 4 + (cdf[nsymbs] > 7) + (cdf[nsymbs] > 15) + get_msb(nsymbs);
+#endif
   const int rate2 = 5;
   int i, tmp;
   int diff;