Add SplitUVPlanes and MergeUVPlanes

include/libyuv/planar_functions.h

 /*
  *  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 21 matching lines @@
 void CopyPlane_16(const uint16* src_y, int src_stride_y,
                   uint16* dst_y, int dst_stride_y,
                   int width, int height);
 
 // Set a plane of data to a 32 bit value.
 LIBYUV_API
 void SetPlane(uint8* dst_y, int dst_stride_y,
               int width, int height,
               uint32 value);
 
+// Split interleaved UV plane into separate U and V planes.
+LIBYUV_API
+int SplitUVPlane(const uint8* src_uv, int src_stride_uv,
+                 uint8* dst_u, int dst_stride_u,
+                 uint8* dst_v, int dst_stride_v,
+                 int width, int height);
+
+// Merge separate U and V planes into one interleaved UV plane.
+LIBYUV_API
+int MergeUVPlanes(const uint8* src_u, int src_stride_u,
+                  const uint8* src_v, int src_stride_v,
+                  uint8* dst_uv, int dst_stride_uv,
+                  int width, int height);
+
 // Copy I400.  Supports inverting.
 LIBYUV_API
 int I400ToI400(const uint8* src_y, int src_stride_y,
                uint8* dst_y, int dst_stride_y,
                int width, int height);
 
 #define J400ToJ400 I400ToI400
 
 // Copy I422 to I422.
 #define I422ToI422 I422Copy
@@ skipping 446 matching lines @@
 int ARGBSobelXY(const uint8* src_argb, int src_stride_argb,
                 uint8* dst_argb, int dst_stride_argb,
                 int width, int height);
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif
 
 #endif  // INCLUDE_LIBYUV_PLANAR_FUNCTIONS_H_  NOLINT