libyuv::YUY2ToY for isolating Y channel of YUY2.

source/row_neon.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.
  */
 
 #include "libyuv/row.h"
 
+#include <stdio.h>
+
 #ifdef __cplusplus
 namespace libyuv {
 extern "C" {
 #endif
 
 // This module is for GCC Neon
 #if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) && \
     !defined(__aarch64__)
 
 // Read 8 Y, 4 U and 4 V from 422
@@ skipping 2811 matching lines @@
     "r"(6)             // %5
   : "cc", "memory", "q0", "q1"  // Clobber List
   );
 }
 #endif  // defined(__ARM_NEON__) && !defined(__aarch64__)
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif