commit e9f70f8f10638ecc5e931cfe6cf5ffc9a19f3a8d
author Alex Converse <aconverse@google.com> Mon Aug 22 12:44:16 2016 -0700
committer Alex Converse <aconverse@google.com> Wed Oct 12 17:41:01 2016 -0700
tree f119261c34966f8b8f00115eb3d9062a32b080bf
parent a1ac972867570fdfc2bda28daf0316b8ecc9a266

Remove the starting zero from ANS CDFs.

This brings it in line with the Daala CDFs and will make it easier to
share code.

Change-Id: Idfd2d2b33c3b9b2c4e72ce72fb3d8039013448b9
(cherry picked from aom/master commit af98507ca928afe33e9f88fdd2ca168379528d6a)

test/ans_test.cc

diff --git a/test/ans_test.cc b/test/ans_test.cc
index ca38de2..4c4aff2 100644
--- a/test/ans_test.cc
+++ b/test/ans_test.cc
@@ -98,9 +98,9 @@
 }
 
 void rans_build_dec_tab(const struct rans_sym sym_tab[], rans_lut dec_tab) {
-  dec_tab[0] = 0;
-  for (int i = 1; dec_tab[i - 1] < RANS_PRECISION; ++i) {
-    dec_tab[i] = dec_tab[i - 1] + sym_tab[i - 1].prob;
+  unsigned int sum = 0;
+  for (int i = 0; sum < RANS_PRECISION; ++i) {
+    dec_tab[i] = sum += sym_tab[i].prob;
   }
 }