[x265] input: fix race condition

[Satoshi Nakagawa]

# HG changeset patch
# User Satoshi Nakagawa <nakagawa424 at oki.com>
# Date 1403343771 -32400
#      Sat Jun 21 18:42:51 2014 +0900
# Node ID 31e1104b97521bde2abe64a3f91d63e673f95c90
# Parent  fe370292c232ec9a629d191791271b71c1c6f354
input: fix race condition

diff -r fe370292c232 -r 31e1104b9752 source/input/y4m.cpp
--- a/source/input/y4m.cpp	Fri Jun 20 16:41:11 2014 -0700
+++ b/source/input/y4m.cpp	Sat Jun 21 18:42:51 2014 +0900
@@ -390,7 +390,6 @@
     /* "open the throttle" at the end, allow reader to consume
      * remaining valid queue entries */
     threadActive = false;
-    frameStat[tail.get()] = false;
     tail.set(QUEUE_SIZE);
 }
 
@@ -406,7 +405,7 @@
     {
         curTail = tail.waitForChange(curTail);
         if (!threadActive)
-            return false;
+            break;
     }
 
 #else
@@ -417,6 +416,7 @@
 
     if (!frameStat[curHead])
         return false;
+    frameStat[curHead] = false;
 
     pic.bitDepth = depth;
     pic.colorSpace = colorSpace;
diff -r fe370292c232 -r 31e1104b9752 source/input/yuv.cpp
--- a/source/input/yuv.cpp	Fri Jun 20 16:41:11 2014 -0700
+++ b/source/input/yuv.cpp	Sat Jun 21 18:42:51 2014 +0900
@@ -182,7 +182,6 @@
     }
 
     threadActive = false;
-    frameStat[tail.get()] = false;
     tail.set(QUEUE_SIZE);
 }
 
@@ -218,7 +217,7 @@
     {
         curTail = tail.waitForChange(curTail);
         if (!threadActive)
-            return false;
+            break;
     }
 
 #else
@@ -229,6 +228,7 @@
 
     if (!frameStat[curHead])
         return false;
+    frameStat[curHead] = false;
 
     pic.colorSpace = colorSpace;
     pic.bitDepth = depth;