Filter Rows in C fix

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/564005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@261 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 260
+Version: 261
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,7 +11,7 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 260
+#define LIBYUV_VERSION 261
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_
 

source/scale_argb.cc

@@ -543,7 +543,7 @@ static void ScaleARGBFilterRows_C(uint8* dst_ptr,
   int y1_fraction = source_y_fraction;
   int y0_fraction = 256 - y1_fraction;
   const uint8* src_ptr1 = src_ptr + src_stride;
-  uint8* end = dst_ptr + dst_width;
+  uint8* end = dst_ptr + (dst_width << 2);
   do {
     dst_ptr[0] = (src_ptr[0] * y0_fraction + src_ptr1[0] * y1_fraction) >> 8;
     dst_ptr[1] = (src_ptr[1] * y0_fraction + src_ptr1[1] * y1_fraction) >> 8;
@@ -557,7 +557,11 @@ static void ScaleARGBFilterRows_C(uint8* dst_ptr,
     src_ptr1 += 8;
     dst_ptr += 8;
   } while (dst_ptr < end);
-  dst_ptr[0] = dst_ptr[-1];
+  // Duplicate the last pixel (4 bytes) for filtering.
+  dst_ptr[0] = dst_ptr[-4];
+  dst_ptr[1] = dst_ptr[-3];
+  dst_ptr[2] = dst_ptr[-2];
+  dst_ptr[3] = dst_ptr[-1];
 }
 
 /**

unit_test/scale_argb_test.cc

@@ -102,7 +102,7 @@ TEST_F(libyuvTest, ARGBScaleDownBy2) {
   const int dst_height = src_height / 2;
   int err = 0;
 
-  for (int f = 0; f < 1; ++f) {
+  for (int f = 0; f < 2; ++f) {
     err += ARGBTestFilter(src_width, src_height,
                           dst_width, dst_height,
                           static_cast<FilterMode>(f));
@@ -119,7 +119,7 @@ TEST_F(libyuvTest, ARGBScaleDownBy4) {
   const int dst_height = src_height / 4;
   int err = 0;
 
-  for (int f = 0; f < 1; ++f) {
+  for (int f = 0; f < 2; ++f) {
     err += ARGBTestFilter(src_width, src_height,
                           dst_width, dst_height,
                           static_cast<FilterMode>(f));
@@ -136,7 +136,7 @@ TEST_F(libyuvTest, ARGBScaleDownBy34) {
   const int dst_height = src_height * 3 / 4;
   int err = 0;
 
-  for (int f = 0; f < 1; ++f) {
+  for (int f = 0; f < 2; ++f) {
     err += ARGBTestFilter(src_width, src_height,
                           dst_width, dst_height,
                           static_cast<FilterMode>(f));
@@ -152,7 +152,7 @@ TEST_F(libyuvTest, ARGBScaleDownBy38) {
   int dst_height = src_height * 3 / 8;
   int err = 0;
 
-  for (int f = 0; f < 1; ++f) {
+  for (int f = 0; f < 2; ++f) {
     err += ARGBTestFilter(src_width, src_height,
                           dst_width, dst_height,
                           static_cast<FilterMode>(f));
@@ -168,7 +168,7 @@ TEST_F(libyuvTest, ARGBScalePlaneBilinear) {
   int dst_height = 768;
   int err = 0;
 
-  for (int f = 0; f < 1; ++f) {
+  for (int f = 0; f < 2; ++f) {
     err += ARGBTestFilter(src_width, src_height,
                           dst_width, dst_height,
                           static_cast<FilterMode>(f));