Fix gcc 4.7 building problems.

media/base/simd/convert_rgb_to_yuv_sse2.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 #include "media/base/simd/convert_rgb_to_yuv.h"
 #include "media/base/simd/yuv_to_rgb_table.h"
 
 #if defined(COMPILER_MSVC)
 #include <intrin.h>
 #else
 #include <mmintrin.h>
 #include <emmintrin.h>
 #endif
 
 namespace media {
 
 #define FIX_SHIFT 12
 #define FIX(x) ((x) * (1 << FIX_SHIFT))
 
+// Define a convenient macro to do static cast.
+#define INT16_FIX(x) static_cast<int16>(FIX(x))
+
 SIMD_ALIGNED(const int16 ConvertRGBAToYUV_kTable[8 * 3]) = {
-  FIX(0.098), FIX(0.504), FIX(0.257), 0,
-  FIX(0.098), FIX(0.504), FIX(0.257), 0,
-  FIX(0.439), -FIX(0.291), -FIX(0.148), 0,
-  FIX(0.439), -FIX(0.291), -FIX(0.148), 0,
- -FIX(0.071), -FIX(0.368), FIX(0.439), 0,
-  -FIX(0.071), -FIX(0.368), FIX(0.439), 0,
+  INT16_FIX(0.098), INT16_FIX(0.504), INT16_FIX(0.257), 0,
+  INT16_FIX(0.098), INT16_FIX(0.504), INT16_FIX(0.257), 0,
+  INT16_FIX(0.439), -INT16_FIX(0.291), -INT16_FIX(0.148), 0,
+  INT16_FIX(0.439), -INT16_FIX(0.291), -INT16_FIX(0.148), 0,
+  -INT16_FIX(0.071), -INT16_FIX(0.368), INT16_FIX(0.439), 0,
+  -INT16_FIX(0.071), -INT16_FIX(0.368), INT16_FIX(0.439), 0,
 };
 
+#undef INT16_FIX
+
 // This is the final offset for the conversion from signed yuv values to
 // unsigned values. It is arranged so that offset of 16 is applied to Y
 // components and 128 is added to UV components for 2 pixels.
 SIMD_ALIGNED(const int32 kYOffset[4]) = {16, 16, 16, 16};
 
 static inline int Clamp(int value) {
   if (value < 0)
     return 0;
   if (value > 255)
     return 255;
@@ skipping 343 matching lines @@
     ++vplane;
     width -= 2;
   }
 
   // Handle the last pixel in the last row.
   if (width)
     ConvertRGBToYUV_V1H1(rgbframe, yplane, uplane, vplane);
 }
 
 }  // namespace media