[x265] [PATCH 2 of 7] search: add RDcost measurement of DeltaQP to lower rdLevels

[deepthi at multicorewareinc.com]

# HG changeset patch
# User Deepthi Nandakumar <deepthi at multicorewareinc.com>
# Date 1428474170 -19800
#      Wed Apr 08 11:52:50 2015 +0530
# Node ID a30aaefa68de138b8fc2745ba02a3bcaaf42acff
# Parent  c20bac870095b72d025f7f2916bd82844e586004
search: add RDcost measurement of DeltaQP to lower rdLevels

This is a follow-on patch to 75d6c2588e34, which changed outputs at rdLevels > 4.
This patch may change outputs at lower rdLevels as well.

diff -r c20bac870095 -r a30aaefa68de source/encoder/search.cpp
--- a/source/encoder/search.cpp	Sat Apr 18 11:16:08 2015 +0530
+++ b/source/encoder/search.cpp	Wed Apr 08 11:52:50 2015 +0530
@@ -3444,12 +3444,26 @@
     {
         if (cu.getQtRootCbf(0))
         {
-            mode.contexts.resetBits();
-            mode.contexts.codeDeltaQP(cu, 0);
-            uint32_t bits = mode.contexts.getNumberOfWrittenBits();
-            mode.mvBits += bits;
-            mode.totalBits += bits;
-            updateModeCost(mode);
+            if (m_param->rdLevel >= 3)
+            {
+                mode.contexts.resetBits();
+                mode.contexts.codeDeltaQP(cu, 0);
+                uint32_t bits = mode.contexts.getNumberOfWrittenBits();
+                mode.mvBits += bits;
+                mode.totalBits += bits;
+                updateModeCost(mode);
+            }
+            else if (m_param->rdLevel <= 1)
+            {
+                mode.sa8dBits++;
+                mode.sa8dCost = m_rdCost.calcRdSADCost(mode.distortion, mode.sa8dBits);
+            }
+            else
+            {
+                mode.mvBits++;
+                mode.totalBits++;
+                updateModeCost(mode);
+            }
         }
         else
             cu.setQPSubParts(cu.getRefQP(0), 0, cuGeom.depth);
@@ -3475,12 +3489,26 @@
         }
         if (hasResidual)
         {
-            mode.contexts.resetBits();
-            mode.contexts.codeDeltaQP(cu, 0);
-            uint32_t bits = mode.contexts.getNumberOfWrittenBits();
-            mode.mvBits += bits;
-            mode.totalBits += bits;
-            updateModeCost(mode);
+            if (m_param->rdLevel >= 3)
+            {
+                mode.contexts.resetBits();
+                mode.contexts.codeDeltaQP(cu, 0);
+                uint32_t bits = mode.contexts.getNumberOfWrittenBits();
+                mode.mvBits += bits;
+                mode.totalBits += bits;
+                updateModeCost(mode);
+            }
+            else if (m_param->rdLevel <= 1)
+            {
+                mode.sa8dBits++;
+                mode.sa8dCost = m_rdCost.calcRdSADCost(mode.distortion, mode.sa8dBits);
+            }
+            else
+            {
+                mode.mvBits++;
+                mode.totalBits++;
+                updateModeCost(mode);
+            }
             /* For all zero CBF sub-CUs, reset QP to RefQP (so that deltaQP is not signalled).
             When the non-zero CBF sub-CU is found, stop */
             cu.setQPSubCUs(cu.getRefQP(0), 0, cuGeom.depth);