Reimplement NV21ToARGB to allow different color matrix.

source/row_common.cc

 /*
  *  Copyright 2011 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 1645 matching lines @@
     src_uv += 2;
     rgb_buf += 8;  // Advance 2 pixels.
   }
   if (width & 1) {
     YuvPixel(src_y[0], src_uv[0], src_uv[1],
              rgb_buf + 0, rgb_buf + 1, rgb_buf + 2, yuvconstants);
     rgb_buf[3] = 255;
   }
 }
 
+void NV21ToARGBRow_C(const uint8* src_y,
+                     const uint8* src_vu,
+                     uint8* rgb_buf,
+                     struct YuvConstants* yuvconstants,
+                     int width) {
+  int x;
+  for (x = 0; x < width - 1; x += 2) {
+    YuvPixel(src_y[0], src_vu[1], src_vu[0],
+             rgb_buf + 0, rgb_buf + 1, rgb_buf + 2, yuvconstants);
+    rgb_buf[3] = 255;
+    YuvPixel(src_y[1], src_vu[1], src_vu[0],
+             rgb_buf + 4, rgb_buf + 5, rgb_buf + 6, yuvconstants);
+    rgb_buf[7] = 255;
+    src_y += 2;
+    src_vu += 2;
+    rgb_buf += 8;  // Advance 2 pixels.
+  }
+  if (width & 1) {
+    YuvPixel(src_y[0], src_vu[1], src_vu[0],
+             rgb_buf + 0, rgb_buf + 1, rgb_buf + 2, yuvconstants);
+    rgb_buf[3] = 255;
+  }
+}
+
 void NV12ToRGB565Row_C(const uint8* src_y,
                        const uint8* src_uv,
                        uint8* dst_rgb565,
                        struct YuvConstants* yuvconstants,
                        int width) {
   uint8 b0;
   uint8 g0;
   uint8 r0;
   uint8 b1;
   uint8 g1;
@@ skipping 984 matching lines @@
     dst_rgb565 += twidth * 2;
     width -= twidth;
   }
 }
 #endif
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif