[x265] [PATCH 2 of 2] slicetype: detect scenecuts or scene transitions that originate at the beginning

[deepthi at multicorewareinc.com]

# HG changeset patch
# User Deepthi Nandakumar <deepthi at multicorewareinc.com>
# Date 1444282542 -19800
#      Thu Oct 08 11:05:42 2015 +0530
# Branch stable
# Node ID 115e78ad59829686d8a66d840c3dc4b0d8cebb28
# Parent  98b1d72c31fccd39e9b343a90d6ecbee72112f00
slicetype: detect scenecuts or scene transitions that originate at the beginning
or end of the current mini-GOP.

diff -r 98b1d72c31fc -r 115e78ad5982 source/encoder/slicetype.cpp
--- a/source/encoder/slicetype.cpp	Thu Oct 08 11:01:28 2015 +0530
+++ b/source/encoder/slicetype.cpp	Thu Oct 08 11:05:42 2015 +0530
@@ -1446,7 +1446,10 @@
             avgSatdCost /= cnt;
             for (int i= p1 ; i <= maxp1; i++)
             {
-                if (fabs((double)(frames[i]->costEst[i - p0][0] - avgSatdCost)) > 0.1 * avgSatdCost)
+                int64_t curCost  = frames[i]->costEst[i - p0][0];
+                int64_t prevCost = frames[i - 1]->costEst[i - 1 - p0][0];
+                if (fabs((double)(curCost - avgSatdCost)) > 0.1 * avgSatdCost || 
+                    fabs((double)(curCost - prevCost)) > 0.1 * prevCost)
                 {
                     fluctuate = true;
                     if (!m_isSceneTransition && frames[i]->bScenecut)