diff -r 000000000000 -r 6474c204b198 media/libvpx/vp9/common/vp9_findnearmv.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/libvpx/vp9/common/vp9_findnearmv.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,72 @@
+/*
+ *  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_FINDNEARMV_H_
+#define VP9_COMMON_VP9_FINDNEARMV_H_
+
+#include "vp9/common/vp9_mv.h"
+#include "vp9/common/vp9_blockd.h"
+#include "vp9/common/vp9_treecoder.h"
+#include "vp9/common/vp9_onyxc_int.h"
+
+#define LEFT_TOP_MARGIN     ((VP9BORDERINPIXELS - VP9_INTERP_EXTEND) << 3)
+#define RIGHT_BOTTOM_MARGIN ((VP9BORDERINPIXELS - VP9_INTERP_EXTEND) << 3)
+
+// check a list of motion vectors by sad score using a number rows of pixels
+// above and a number cols of pixels in the left to select the one with best
+// score to use as ref motion vector
+void vp9_find_best_ref_mvs(MACROBLOCKD *xd, int allow_hp,
+                           int_mv *mvlist, int_mv *nearest, int_mv *near);
+
+// TODO(jingning): this mv clamping function should be block size dependent.
+static void clamp_mv2(MV *mv, const MACROBLOCKD *xd) {
+  clamp_mv(mv, xd->mb_to_left_edge - LEFT_TOP_MARGIN,
+               xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN,
+               xd->mb_to_top_edge - LEFT_TOP_MARGIN,
+               xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN);
+}
+
+void vp9_append_sub8x8_mvs_for_idx(VP9_COMMON *cm, MACROBLOCKD *xd,
+                                   const TileInfo *const tile,
+                                   int_mv *dst_nearest,
+                                   int_mv *dst_near,
+                                   int block_idx, int ref_idx,
+                                   int mi_row, int mi_col);
+
+static MB_PREDICTION_MODE left_block_mode(const MODE_INFO *cur_mi,
+                                          const MODE_INFO *left_mi, int b) {
+  if (b == 0 || b == 2) {
+    if (!left_mi || is_inter_block(&left_mi->mbmi))
+      return DC_PRED;
+
+    return left_mi->mbmi.sb_type < BLOCK_8X8 ? left_mi->bmi[b + 1].as_mode
+                                             : left_mi->mbmi.mode;
+  } else {
+    assert(b == 1 || b == 3);
+    return cur_mi->bmi[b - 1].as_mode;
+  }
+}
+
+static MB_PREDICTION_MODE above_block_mode(const MODE_INFO *cur_mi,
+                                           const MODE_INFO *above_mi, int b) {
+  if (b == 0 || b == 1) {
+    if (!above_mi || is_inter_block(&above_mi->mbmi))
+      return DC_PRED;
+
+    return above_mi->mbmi.sb_type < BLOCK_8X8 ? above_mi->bmi[b + 2].as_mode
+                                              : above_mi->mbmi.mode;
+  } else {
+    assert(b == 2 || b == 3);
+    return cur_mi->bmi[b - 2].as_mode;
+  }
+}
+
+#endif  // VP9_COMMON_VP9_FINDNEARMV_H_