From 90310ddbb9342e399e9bb0d833d53189c5300b45 Mon Sep 17 00:00:00 2001
From: "fbarchard@google.com"
 <fbarchard@google.com@16f28f9a-4ce2-e073-06de-1de4eb20be90>
Date: Thu, 8 Mar 2012 04:01:50 +0000
Subject: [PATCH] add environment variable to scale to override default
 filtering BUG=none TEST=none Review URL:
 https://webrtc-codereview.appspot.com/442001

git-svn-id: http://libyuv.googlecode.com/svn/trunk@209 16f28f9a-4ce2-e073-06de-1de4eb20be90
---
 README.chromium          | 2 +-
 include/libyuv/version.h | 2 +-
 source/scale.cc          | 8 ++++++++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/README.chromium b/README.chromium
index d87a8190a..74f81d9ce 100644
--- a/README.chromium
+++ b/README.chromium
@@ -1,6 +1,6 @@
 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 208
+Version: 209
 License: BSD
 License File: LICENSE
 
diff --git a/include/libyuv/version.h b/include/libyuv/version.h
index 579f72071..a1e2f0a62 100644
--- a/include/libyuv/version.h
+++ b/include/libyuv/version.h
@@ -11,7 +11,7 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 208
+#define LIBYUV_VERSION 209
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_
 
diff --git a/source/scale.cc b/source/scale.cc
index d0ebb075b..81ae53df8 100644
--- a/source/scale.cc
+++ b/source/scale.cc
@@ -12,6 +12,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <stdlib.h>  // For getenv()
 
 #include "libyuv/cpu_id.h"
 #include "libyuv/planar_functions.h"  // For CopyPlane
@@ -3636,6 +3637,13 @@ static void ScalePlane(const uint8* src, int src_stride,
                        uint8* dst, int dst_stride,
                        int dst_width, int dst_height,
                        FilterMode filtering, bool use_ref) {
+#ifdef CPU_X86
+  // environment variable overrides for testing.
+  char *filter_override = getenv("LIBYUV_FILTER");
+  if (filter_override) {
+    filtering = (FilterMode)atoi(filter_override);
+  }
+#endif
   // Use specialized scales to improve performance for common resolutions.
   // For example, all the 1/2 scalings will use ScalePlaneDown2()
   if (dst_width == src_width && dst_height == src_height) {