[x265] [PATCH] analysis: respect X265_REF_LIMIT_DEPTH with RD 0/4

[ashok at multicorewareinc.com]

# HG changeset patch
# User Ashok Kumar Mishra<ashok at multicorewareinc.com>
# Date 1431936119 -19800
#      Mon May 18 13:31:59 2015 +0530
# Node ID 3a8c241580093e93b5e46a0a13f631c4420215cd
# Parent  f6c9a1e184fe7a8c17744117120828458be43106
analysis: respect X265_REF_LIMIT_DEPTH with RD 0/4

When this flag is not set, we do not restrict references used by parent CUs

diff -r f6c9a1e184fe -r 3a8c24158009 source/encoder/analysis.cpp
--- a/source/encoder/analysis.cpp	Mon May 18 13:26:33 2015 +0530
+++ b/source/encoder/analysis.cpp	Mon May 18 13:31:59 2015 +0530
@@ -1098,7 +1098,9 @@
 
     /* determine which motion references the parent CU should search */
     uint32_t refMask;
-    if (md.bestMode == &md.pred[PRED_SPLIT])
+    if (!(m_param->limitReferences & X265_REF_LIMIT_DEPTH))
+        refMask = 0;
+    else if (md.bestMode == &md.pred[PRED_SPLIT])
         refMask = allSplitRefs;
     else
     {