[x265] [PATCH] improve fillReferenceSamples by reduce condition operators in loop

[Min Chen]

# HG changeset patch
# User Min Chen <chenm003 at 163.com>
# Date 1434578419 25200
# Node ID cc2dfd5afed2d730cffe4b243b779eb9ef6945b1
# Parent  70e715cf702f8723a14b2b9d541cbcc364ebebab
improve fillReferenceSamples by reduce condition operators in loop
---
 source/common/predict.cpp |   23 +++++------------------
 1 files changed, 5 insertions(+), 18 deletions(-)

diff -r 70e715cf702f -r cc2dfd5afed2 source/common/predict.cpp
--- a/source/common/predict.cpp	Wed Jun 17 15:00:15 2015 -0700
+++ b/source/common/predict.cpp	Wed Jun 17 15:00:19 2015 -0700
@@ -776,30 +776,17 @@
         // Fill left & below-left samples
         adiTemp += picStride;
         adi--;
-        pNeighborFlags--;
-        for (int j = 0; j < leftUnits; j++)
+        // NOTE: over copy here, but reduce condition operators
+        for (int j = 0; j < leftUnits * unitHeight; j++)
         {
-            if (*pNeighborFlags)
-                for (int i = 0; i < unitHeight; i++)
-                    adi[-i] = adiTemp[i * picStride];
-
-            adiTemp += unitHeight * picStride;
-            adi -= unitHeight;
-            pNeighborFlags--;
+            adi[-j] = adiTemp[j * picStride];
         }
 
         // Fill above & above-right samples
         adiTemp = adiOrigin - picStride;
         adi = adiLineBuffer + (leftUnits * unitHeight) + unitWidth;
-        pNeighborFlags = bNeighborFlags + leftUnits + 1;
-        for (int j = 0; j < aboveUnits; j++)
-        {
-            if (*pNeighborFlags)
-                memcpy(adi, adiTemp, unitWidth * sizeof(*adiTemp));
-            adiTemp += unitWidth;
-            adi += unitWidth;
-            pNeighborFlags++;
-        }
+        // NOTE: over copy here, but reduce condition operators
+        memcpy(adi, adiTemp, aboveUnits * unitWidth * sizeof(*adiTemp));
 
         // Pad reference samples when necessary
         int curr = 0;