Code cleanup inside findnearmv code.

Using predefined clamp function, removing redundant variables, declare and
init on the same line.

Change-Id: I14636eb242194bac33f8a9d4a273a416d32856fc

vp9/common/vp9_findnearmv.c

@@ -8,7 +8,6 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-
 #include <limits.h>
 
 #include "vp9/common/vp9_findnearmv.h"
@@ -22,8 +21,7 @@ const uint8_t vp9_mbsplit_offset[4][16] = {
   { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15}
 };
 
-static void lower_mv_precision(int_mv *mv, int usehp)
-{
+static void lower_mv_precision(int_mv *mv, int usehp) {
   if (!usehp || !vp9_use_nmv_hp(&mv->as_mv)) {
     if (mv->as_mv.row & 1)
       mv->as_mv.row += (mv->as_mv.row > 0 ? -1 : 1);
@@ -32,8 +30,7 @@ static void lower_mv_precision(int_mv *mv, int usehp)
   }
 }
 
-vp9_prob *vp9_mv_ref_probs(VP9_COMMON *pc,
-                           vp9_prob p[4], const int context) {
+vp9_prob *vp9_mv_ref_probs(VP9_COMMON *pc, vp9_prob p[4], int context) {
   p[0] = pc->fc.vp9_mode_contexts[context][0];
   p[1] = pc->fc.vp9_mode_contexts[context][1];
   p[2] = pc->fc.vp9_mode_contexts[context][2];

vp9/common/vp9_findnearmv.h

@@ -20,10 +20,9 @@
 #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
- */
+// 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,
                            uint8_t *ref_y_buffer,
                            int ref_y_stride,
@@ -49,29 +48,19 @@ static void clamp_mv(int_mv *mv,
                      int mb_to_right_edge,
                      int mb_to_top_edge,
                      int mb_to_bottom_edge) {
-  mv->as_mv.col = (mv->as_mv.col < mb_to_left_edge) ?
-                  mb_to_left_edge : mv->as_mv.col;
-  mv->as_mv.col = (mv->as_mv.col > mb_to_right_edge) ?
-                  mb_to_right_edge : mv->as_mv.col;
-  mv->as_mv.row = (mv->as_mv.row < mb_to_top_edge) ?
-                  mb_to_top_edge : mv->as_mv.row;
-  mv->as_mv.row = (mv->as_mv.row > mb_to_bottom_edge) ?
-                  mb_to_bottom_edge : mv->as_mv.row;
+  mv->as_mv.col = clamp(mv->as_mv.col, mb_to_left_edge, mb_to_right_edge);
+  mv->as_mv.row = clamp(mv->as_mv.row, mb_to_top_edge, mb_to_bottom_edge);
 }
 
 static int clamp_mv2(int_mv *mv, const MACROBLOCKD *xd) {
   int_mv tmp_mv;
-  int    mv_clampped = 0;
   tmp_mv.as_int = mv->as_int;
   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);
-  if (tmp_mv.as_int != mv->as_int)
-    mv_clampped = 1;
-
-  return mv_clampped;
+  return tmp_mv.as_int != mv->as_int;
 }
 
 static int check_mv_bounds(int_mv *mv,