libvpx: Add VP9 decoder.

source/libvpx/vp9/common/vp9_common.h

+/*
+ *  Copyright (c) 2010 The WebM 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.
+ */
+
+
+#ifndef VP9_COMMON_VP9_COMMON_H_
+#define VP9_COMMON_VP9_COMMON_H_
+
+#include <assert.h>
+#include "vpx_config.h"
+/* Interface header for common constant data structures and lookup tables */
+
+#include "vpx_mem/vpx_mem.h"
+
+#include "vp9/common/vp9_common_types.h"
+
+/* Only need this for fixed-size arrays, for structs just assign. */
+
+#define vp9_copy( Dest, Src) { \
+    assert( sizeof( Dest) == sizeof( Src)); \
+    vpx_memcpy( Dest, Src, sizeof( Src)); \
+  }
+
+/* Use this for variably-sized arrays. */
+
+#define vp9_copy_array( Dest, Src, N) { \
+    assert( sizeof( *Dest) == sizeof( *Src)); \
+    vpx_memcpy( Dest, Src, N * sizeof( *Src)); \
+  }
+
+#define vp9_zero( Dest)  vpx_memset( &Dest, 0, sizeof( Dest));
+
+#define vp9_zero_array( Dest, N)  vpx_memset( Dest, 0, N * sizeof( *Dest));
+
+#endif  /* common_h */