libvpx: Add VP9 decoder.

source/libvpx/vp9/encoder/vp9_encodemv.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_ENCODER_VP9_ENCODEMV_H_
+#define VP9_ENCODER_VP9_ENCODEMV_H_
+
+#include "vp9/encoder/vp9_onyx_int.h"
+
+void vp9_write_nmv_probs(VP9_COMP* const, int usehp, vp9_writer* const);
+void vp9_encode_nmv(vp9_writer* const w, const MV* const mv,
+                    const MV* const ref, const nmv_context* const mvctx);
+void vp9_encode_nmv_fp(vp9_writer* const w, const MV* const mv,
+                       const MV* const ref, const nmv_context* const mvctx,
+                       int usehp);
+void vp9_build_nmv_cost_table(int *mvjoint,
+                              int *mvcost[2],
+                              const nmv_context* const mvctx,
+                              int usehp,
+                              int mvc_flag_v,
+                              int mvc_flag_h);
+void vp9_update_nmv_count(VP9_COMP *cpi, MACROBLOCK *x,
+                          int_mv *best_ref_mv, int_mv *second_best_ref_mv);
+
+void print_nmvcounts(nmv_context_counts tnmvcounts);
+#endif