michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef __INC_FINDNEARMV_H
michael@0: #define __INC_FINDNEARMV_H
michael@0: 
michael@0: #include "mv.h"
michael@0: #include "blockd.h"
michael@0: #include "modecont.h"
michael@0: #include "treecoder.h"
michael@0: 
michael@0: 
michael@0: static void mv_bias(int refmb_ref_frame_sign_bias, int refframe, int_mv *mvp,
michael@0:                     const int *ref_frame_sign_bias)
michael@0: {
michael@0:     if (refmb_ref_frame_sign_bias != ref_frame_sign_bias[refframe])
michael@0:     {
michael@0:         mvp->as_mv.row *= -1;
michael@0:         mvp->as_mv.col *= -1;
michael@0:     }
michael@0: }
michael@0: 
michael@0: #define LEFT_TOP_MARGIN (16 << 3)
michael@0: #define RIGHT_BOTTOM_MARGIN (16 << 3)
michael@0: static void vp8_clamp_mv2(int_mv *mv, const MACROBLOCKD *xd)
michael@0: {
michael@0:     if (mv->as_mv.col < (xd->mb_to_left_edge - LEFT_TOP_MARGIN))
michael@0:         mv->as_mv.col = xd->mb_to_left_edge - LEFT_TOP_MARGIN;
michael@0:     else if (mv->as_mv.col > xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN)
michael@0:         mv->as_mv.col = xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN;
michael@0: 
michael@0:     if (mv->as_mv.row < (xd->mb_to_top_edge - LEFT_TOP_MARGIN))
michael@0:         mv->as_mv.row = xd->mb_to_top_edge - LEFT_TOP_MARGIN;
michael@0:     else if (mv->as_mv.row > xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN)
michael@0:         mv->as_mv.row = xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN;
michael@0: }
michael@0: 
michael@0: static void vp8_clamp_mv(int_mv *mv, int mb_to_left_edge, int mb_to_right_edge,
michael@0:                          int mb_to_top_edge, int mb_to_bottom_edge)
michael@0: {
michael@0:     mv->as_mv.col = (mv->as_mv.col < mb_to_left_edge) ?
michael@0:         mb_to_left_edge : mv->as_mv.col;
michael@0:     mv->as_mv.col = (mv->as_mv.col > mb_to_right_edge) ?
michael@0:         mb_to_right_edge : mv->as_mv.col;
michael@0:     mv->as_mv.row = (mv->as_mv.row < mb_to_top_edge) ?
michael@0:         mb_to_top_edge : mv->as_mv.row;
michael@0:     mv->as_mv.row = (mv->as_mv.row > mb_to_bottom_edge) ?
michael@0:         mb_to_bottom_edge : mv->as_mv.row;
michael@0: }
michael@0: static unsigned int vp8_check_mv_bounds(int_mv *mv, int mb_to_left_edge,
michael@0:                                 int mb_to_right_edge, int mb_to_top_edge,
michael@0:                                 int mb_to_bottom_edge)
michael@0: {
michael@0:     unsigned int need_to_clamp;
michael@0:     need_to_clamp = (mv->as_mv.col < mb_to_left_edge);
michael@0:     need_to_clamp |= (mv->as_mv.col > mb_to_right_edge);
michael@0:     need_to_clamp |= (mv->as_mv.row < mb_to_top_edge);
michael@0:     need_to_clamp |= (mv->as_mv.row > mb_to_bottom_edge);
michael@0:     return need_to_clamp;
michael@0: }
michael@0: 
michael@0: void vp8_find_near_mvs
michael@0: (
michael@0:     MACROBLOCKD *xd,
michael@0:     const MODE_INFO *here,
michael@0:     int_mv *nearest, int_mv *nearby, int_mv *best,
michael@0:     int near_mv_ref_cts[4],
michael@0:     int refframe,
michael@0:     int *ref_frame_sign_bias
michael@0: );
michael@0: 
michael@0: 
michael@0: int vp8_find_near_mvs_bias
michael@0: (
michael@0:     MACROBLOCKD *xd,
michael@0:     const MODE_INFO *here,
michael@0:     int_mv mode_mv_sb[2][MB_MODE_COUNT],
michael@0:     int_mv best_mv_sb[2],
michael@0:     int cnt[4],
michael@0:     int refframe,
michael@0:     int *ref_frame_sign_bias
michael@0: );
michael@0: 
michael@0: 
michael@0: vp8_prob *vp8_mv_ref_probs(
michael@0:     vp8_prob p[VP8_MVREFS-1], const int near_mv_ref_ct[4]
michael@0: );
michael@0: 
michael@0: extern const unsigned char vp8_mbsplit_offset[4][16];
michael@0: 
michael@0: 
michael@0: static int left_block_mv(const MODE_INFO *cur_mb, int b)
michael@0: {
michael@0:     if (!(b & 3))
michael@0:     {
michael@0:         /* On L edge, get from MB to left of us */
michael@0:         --cur_mb;
michael@0: 
michael@0:         if(cur_mb->mbmi.mode != SPLITMV)
michael@0:             return cur_mb->mbmi.mv.as_int;
michael@0:         b += 4;
michael@0:     }
michael@0: 
michael@0:     return (cur_mb->bmi + b - 1)->mv.as_int;
michael@0: }
michael@0: 
michael@0: static int above_block_mv(const MODE_INFO *cur_mb, int b, int mi_stride)
michael@0: {
michael@0:     if (!(b >> 2))
michael@0:     {
michael@0:         /* On top edge, get from MB above us */
michael@0:         cur_mb -= mi_stride;
michael@0: 
michael@0:         if(cur_mb->mbmi.mode != SPLITMV)
michael@0:             return cur_mb->mbmi.mv.as_int;
michael@0:         b += 16;
michael@0:     }
michael@0: 
michael@0:     return (cur_mb->bmi + (b - 4))->mv.as_int;
michael@0: }
michael@0: static B_PREDICTION_MODE left_block_mode(const MODE_INFO *cur_mb, int b)
michael@0: {
michael@0:     if (!(b & 3))
michael@0:     {
michael@0:         /* On L edge, get from MB to left of us */
michael@0:         --cur_mb;
michael@0:         switch (cur_mb->mbmi.mode)
michael@0:         {
michael@0:             case B_PRED:
michael@0:               return (cur_mb->bmi + b + 3)->as_mode;
michael@0:             case DC_PRED:
michael@0:                 return B_DC_PRED;
michael@0:             case V_PRED:
michael@0:                 return B_VE_PRED;
michael@0:             case H_PRED:
michael@0:                 return B_HE_PRED;
michael@0:             case TM_PRED:
michael@0:                 return B_TM_PRED;
michael@0:             default:
michael@0:                 return B_DC_PRED;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     return (cur_mb->bmi + b - 1)->as_mode;
michael@0: }
michael@0: 
michael@0: static B_PREDICTION_MODE above_block_mode(const MODE_INFO *cur_mb, int b, int mi_stride)
michael@0: {
michael@0:     if (!(b >> 2))
michael@0:     {
michael@0:         /* On top edge, get from MB above us */
michael@0:         cur_mb -= mi_stride;
michael@0: 
michael@0:         switch (cur_mb->mbmi.mode)
michael@0:         {
michael@0:             case B_PRED:
michael@0:               return (cur_mb->bmi + b + 12)->as_mode;
michael@0:             case DC_PRED:
michael@0:                 return B_DC_PRED;
michael@0:             case V_PRED:
michael@0:                 return B_VE_PRED;
michael@0:             case H_PRED:
michael@0:                 return B_HE_PRED;
michael@0:             case TM_PRED:
michael@0:                 return B_TM_PRED;
michael@0:             default:
michael@0:                 return B_DC_PRED;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     return (cur_mb->bmi + b - 4)->as_mode;
michael@0: }
michael@0: 
michael@0: #endif