scale avoid math overflow in fixed point for large images

BUG=410
TESTED=set LIBYUV_WIDTH=65536 out\release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=libyuvTest.ScaleTo320x240_None
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/42319004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1320 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1318
+Version: 1320
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1318
+#define LIBYUV_VERSION 1320
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/scale.cc

@@ -1565,6 +1565,7 @@ int I420Scale(const uint8* src_y, int src_stride_y,
   int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1);
   int dst_halfheight = SUBSAMPLE(dst_height, 1, 1);
   if (!src_y || !src_u || !src_v || src_width == 0 || src_height == 0 ||
+      src_width > 32768 || src_height > 32768 ||
       !dst_y || !dst_u || !dst_v || dst_width <= 0 || dst_height <= 0) {
     return -1;
   }
@@ -1596,6 +1597,7 @@ int I420Scale_16(const uint16* src_y, int src_stride_y,
   int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1);
   int dst_halfheight = SUBSAMPLE(dst_height, 1, 1);
   if (!src_y || !src_u || !src_v || src_width == 0 || src_height == 0 ||
+      src_width > 32768 || src_height > 32768 ||
       !dst_y || !dst_u || !dst_v || dst_width <= 0 || dst_height <= 0) {
     return -1;
   }

source/scale_argb.cc

@@ -744,6 +744,7 @@ int ARGBScaleClip(const uint8* src_argb, int src_stride_argb,
   if (!src_argb || src_width == 0 || src_height == 0 ||
       !dst_argb || dst_width <= 0 || dst_height <= 0 ||
       clip_x < 0 || clip_y < 0 ||
+      clip_width > 32768 || clip_height > 32768 ||
       (clip_x + clip_width) > dst_width ||
       (clip_y + clip_height) > dst_height) {
     return -1;
@@ -762,6 +763,7 @@ int ARGBScale(const uint8* src_argb, int src_stride_argb,
               int dst_width, int dst_height,
               enum FilterMode filtering) {
   if (!src_argb || src_width == 0 || src_height == 0 ||
+      src_width > 32768 || src_height > 32768 ||
       !dst_argb || dst_width <= 0 || dst_height <= 0) {
     return -1;
   }