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add environment variable to scale to override default filtering

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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
This commit is contained in:
fbarchard@google.com 2012-03-08 04:01:50 +00:00
parent bd4a849bcb
commit 90310ddbb9
3 changed files with 10 additions and 2 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv
URL: http://code.google.com/p/libyuv/
Version: 208
Version: 209
License: BSD
License File: LICENSE

2
include/libyuv/version.h
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@ -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_

8
source/scale.cc
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@ -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) {