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      1 /*
      2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef VP8_COMMON_FINDNEARMV_H_
     12 #define VP8_COMMON_FINDNEARMV_H_
     13 
     14 #include "./vpx_config.h"
     15 #include "mv.h"
     16 #include "blockd.h"
     17 #include "modecont.h"
     18 #include "treecoder.h"
     19 
     20 #ifdef __cplusplus
     21 extern "C" {
     22 #endif
     23 
     24 static INLINE void mv_bias(int refmb_ref_frame_sign_bias, int refframe,
     25                            int_mv *mvp, const int *ref_frame_sign_bias) {
     26   if (refmb_ref_frame_sign_bias != ref_frame_sign_bias[refframe]) {
     27     mvp->as_mv.row *= -1;
     28     mvp->as_mv.col *= -1;
     29   }
     30 }
     31 
     32 #define LEFT_TOP_MARGIN (16 << 3)
     33 #define RIGHT_BOTTOM_MARGIN (16 << 3)
     34 static INLINE void vp8_clamp_mv2(int_mv *mv, const MACROBLOCKD *xd) {
     35   if (mv->as_mv.col < (xd->mb_to_left_edge - LEFT_TOP_MARGIN)) {
     36     mv->as_mv.col = xd->mb_to_left_edge - LEFT_TOP_MARGIN;
     37   } else if (mv->as_mv.col > xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN) {
     38     mv->as_mv.col = xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN;
     39   }
     40 
     41   if (mv->as_mv.row < (xd->mb_to_top_edge - LEFT_TOP_MARGIN)) {
     42     mv->as_mv.row = xd->mb_to_top_edge - LEFT_TOP_MARGIN;
     43   } else if (mv->as_mv.row > xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN) {
     44     mv->as_mv.row = xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN;
     45   }
     46 }
     47 
     48 static INLINE void vp8_clamp_mv(int_mv *mv, int mb_to_left_edge,
     49                                 int mb_to_right_edge, int mb_to_top_edge,
     50                                 int mb_to_bottom_edge) {
     51   mv->as_mv.col =
     52       (mv->as_mv.col < mb_to_left_edge) ? mb_to_left_edge : mv->as_mv.col;
     53   mv->as_mv.col =
     54       (mv->as_mv.col > mb_to_right_edge) ? mb_to_right_edge : mv->as_mv.col;
     55   mv->as_mv.row =
     56       (mv->as_mv.row < mb_to_top_edge) ? mb_to_top_edge : mv->as_mv.row;
     57   mv->as_mv.row =
     58       (mv->as_mv.row > mb_to_bottom_edge) ? mb_to_bottom_edge : mv->as_mv.row;
     59 }
     60 static INLINE unsigned int vp8_check_mv_bounds(int_mv *mv, int mb_to_left_edge,
     61                                                int mb_to_right_edge,
     62                                                int mb_to_top_edge,
     63                                                int mb_to_bottom_edge) {
     64   unsigned int need_to_clamp;
     65   need_to_clamp = (mv->as_mv.col < mb_to_left_edge);
     66   need_to_clamp |= (mv->as_mv.col > mb_to_right_edge);
     67   need_to_clamp |= (mv->as_mv.row < mb_to_top_edge);
     68   need_to_clamp |= (mv->as_mv.row > mb_to_bottom_edge);
     69   return need_to_clamp;
     70 }
     71 
     72 void vp8_find_near_mvs(MACROBLOCKD *xd, const MODE_INFO *here, int_mv *nearest,
     73                        int_mv *nearby, int_mv *best, int near_mv_ref_cts[4],
     74                        int refframe, int *ref_frame_sign_bias);
     75 
     76 int vp8_find_near_mvs_bias(MACROBLOCKD *xd, const MODE_INFO *here,
     77                            int_mv mode_mv_sb[2][MB_MODE_COUNT],
     78                            int_mv best_mv_sb[2], int cnt[4], int refframe,
     79                            int *ref_frame_sign_bias);
     80 
     81 vp8_prob *vp8_mv_ref_probs(vp8_prob p[VP8_MVREFS - 1],
     82                            const int near_mv_ref_ct[4]);
     83 
     84 extern const unsigned char vp8_mbsplit_offset[4][16];
     85 
     86 static INLINE uint32_t left_block_mv(const MODE_INFO *cur_mb, int b) {
     87   if (!(b & 3)) {
     88     /* On L edge, get from MB to left of us */
     89     --cur_mb;
     90 
     91     if (cur_mb->mbmi.mode != SPLITMV) return cur_mb->mbmi.mv.as_int;
     92     b += 4;
     93   }
     94 
     95   return (cur_mb->bmi + b - 1)->mv.as_int;
     96 }
     97 
     98 static INLINE uint32_t above_block_mv(const MODE_INFO *cur_mb, int b,
     99                                       int mi_stride) {
    100   if (!(b >> 2)) {
    101     /* On top edge, get from MB above us */
    102     cur_mb -= mi_stride;
    103 
    104     if (cur_mb->mbmi.mode != SPLITMV) return cur_mb->mbmi.mv.as_int;
    105     b += 16;
    106   }
    107 
    108   return (cur_mb->bmi + (b - 4))->mv.as_int;
    109 }
    110 static INLINE B_PREDICTION_MODE left_block_mode(const MODE_INFO *cur_mb,
    111                                                 int b) {
    112   if (!(b & 3)) {
    113     /* On L edge, get from MB to left of us */
    114     --cur_mb;
    115     switch (cur_mb->mbmi.mode) {
    116       case B_PRED: return (cur_mb->bmi + b + 3)->as_mode;
    117       case DC_PRED: return B_DC_PRED;
    118       case V_PRED: return B_VE_PRED;
    119       case H_PRED: return B_HE_PRED;
    120       case TM_PRED: return B_TM_PRED;
    121       default: return B_DC_PRED;
    122     }
    123   }
    124 
    125   return (cur_mb->bmi + b - 1)->as_mode;
    126 }
    127 
    128 static INLINE B_PREDICTION_MODE above_block_mode(const MODE_INFO *cur_mb, int b,
    129                                                  int mi_stride) {
    130   if (!(b >> 2)) {
    131     /* On top edge, get from MB above us */
    132     cur_mb -= mi_stride;
    133 
    134     switch (cur_mb->mbmi.mode) {
    135       case B_PRED: return (cur_mb->bmi + b + 12)->as_mode;
    136       case DC_PRED: return B_DC_PRED;
    137       case V_PRED: return B_VE_PRED;
    138       case H_PRED: return B_HE_PRED;
    139       case TM_PRED: return B_TM_PRED;
    140       default: return B_DC_PRED;
    141     }
    142   }
    143 
    144   return (cur_mb->bmi + b - 4)->as_mode;
    145 }
    146 
    147 #ifdef __cplusplus
    148 }  // extern "C"
    149 #endif
    150 
    151 #endif  // VP8_COMMON_FINDNEARMV_H_
    152