Fix the WebRTC color bug.

media/base/simd/convert_rgb_to_yuv_c.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 "media/base/simd/convert_rgb_to_yuv.h"
 
 namespace media {
 
 static int clip_byte(int x) {
   if (x > 255)
     return 255;
   else if (x < 0)
     return 0;
   else
     return x;
 }
 
 void ConvertRGB32ToYUV_C(const uint8* rgbframe,
                          uint8* yplane,
                          uint8* uplane,
                          uint8* vplane,
                          int width,
                          int height,
                          int rgbstride,
                          int ystride,
                          int uvstride) {
+#if defined(OS_ANDROID)
+  const int r = 0;
+  const int g = 1;
+  const int b = 2;
+#else
+  const int r = 2;
+  const int g = 1;
+  const int b = 0;
+#endif
+
   for (int i = 0; i < height; ++i) {
     for (int j = 0; j < width; ++j) {
       // Since the input pixel format is RGB32, there are 4 bytes per pixel.
       const uint8* pixel = rgbframe + 4 * j;
-      yplane[j] = clip_byte(((pixel[2] * 66 + pixel[1] * 129 +
-                             pixel[0] * 25 + 128) >> 8) + 16);
+      yplane[j] = clip_byte(((pixel[r] * 66 + pixel[g] * 129 +
+                             pixel[b] * 25 + 128) >> 8) + 16);
       if (i % 2 == 0 && j % 2 == 0) {
-        uplane[j / 2] = clip_byte(((pixel[2] * -38 + pixel[1] * -74 +
-                                   pixel[0] * 112 + 128) >> 8) + 128);
-        vplane[j / 2] = clip_byte(((pixel[2] * 112 + pixel[1] * -94 +
-                                    pixel[0] * -18 + 128) >> 8) + 128);
+        uplane[j / 2] = clip_byte(((pixel[r] * -38 + pixel[g] * -74 +
+                                   pixel[b] * 112 + 128) >> 8) + 128);
+        vplane[j / 2] = clip_byte(((pixel[r] * 112 + pixel[g] * -94 +
+                                    pixel[b] * -18 + 128) >> 8) + 128);
       }
     }
-
     rgbframe += rgbstride;
     yplane += ystride;
     if (i % 2 == 0) {
       uplane += uvstride;
       vplane += uvstride;
     }
   }
 }
 
 void ConvertRGB24ToYUV_C(const uint8* rgbframe,
@@ skipping 22 matching lines @@
     rgbframe += rgbstride;
     yplane += ystride;
     if (i % 2 == 0) {
       uplane += uvstride;
       vplane += uvstride;
     }
   }
 }
 
 }  // namespace media