ref: bb1a23656c63097a4b250ac484b14051f09df9b5
dir: /vp8/common/findnearmv.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 VP8_COMMON_FINDNEARMV_H_
#define VP8_COMMON_FINDNEARMV_H_
#include "mv.h"
#include "blockd.h"
#include "modecont.h"
#include "treecoder.h"
#ifdef __cplusplus
extern "C" {
#endif
static void mv_bias(int refmb_ref_frame_sign_bias, int refframe, int_mv *mvp,
const int *ref_frame_sign_bias)
{
if (refmb_ref_frame_sign_bias != ref_frame_sign_bias[refframe])
{
mvp->as_mv.row *= -1;
mvp->as_mv.col *= -1;
}
}
#define LEFT_TOP_MARGIN (16 << 3)
#define RIGHT_BOTTOM_MARGIN (16 << 3)
static void vp8_clamp_mv2(int_mv *mv, const MACROBLOCKD *xd)
{
if (mv->as_mv.col < (xd->mb_to_left_edge - LEFT_TOP_MARGIN))
mv->as_mv.col = xd->mb_to_left_edge - LEFT_TOP_MARGIN;
else if (mv->as_mv.col > xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN)
mv->as_mv.col = xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN;
if (mv->as_mv.row < (xd->mb_to_top_edge - LEFT_TOP_MARGIN))
mv->as_mv.row = xd->mb_to_top_edge - LEFT_TOP_MARGIN;
else if (mv->as_mv.row > xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN)
mv->as_mv.row = xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN;
}
static void vp8_clamp_mv(int_mv *mv, int mb_to_left_edge, 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;
}
static unsigned int vp8_check_mv_bounds(int_mv *mv, int mb_to_left_edge,
int mb_to_right_edge, int mb_to_top_edge,
int mb_to_bottom_edge)
{
unsigned int need_to_clamp;
need_to_clamp = (mv->as_mv.col < mb_to_left_edge);
need_to_clamp |= (mv->as_mv.col > mb_to_right_edge);
need_to_clamp |= (mv->as_mv.row < mb_to_top_edge);
need_to_clamp |= (mv->as_mv.row > mb_to_bottom_edge);
return need_to_clamp;
}
void vp8_find_near_mvs
(
MACROBLOCKD *xd,
const MODE_INFO *here,
int_mv *nearest, int_mv *nearby, int_mv *best,
int near_mv_ref_cts[4],
int refframe,
int *ref_frame_sign_bias
);
int vp8_find_near_mvs_bias
(
MACROBLOCKD *xd,
const MODE_INFO *here,
int_mv mode_mv_sb[2][MB_MODE_COUNT],
int_mv best_mv_sb[2],
int cnt[4],
int refframe,
int *ref_frame_sign_bias
);
vp8_prob *vp8_mv_ref_probs(
vp8_prob p[VP8_MVREFS-1], const int near_mv_ref_ct[4]
);
extern const unsigned char vp8_mbsplit_offset[4][16];
static int left_block_mv(const MODE_INFO *cur_mb, int b)
{
if (!(b & 3))
{
/* On L edge, get from MB to left of us */
--cur_mb;
if(cur_mb->mbmi.mode != SPLITMV)
return cur_mb->mbmi.mv.as_int;
b += 4;
}
return (cur_mb->bmi + b - 1)->mv.as_int;
}
static int above_block_mv(const MODE_INFO *cur_mb, int b, int mi_stride)
{
if (!(b >> 2))
{
/* On top edge, get from MB above us */
cur_mb -= mi_stride;
if(cur_mb->mbmi.mode != SPLITMV)
return cur_mb->mbmi.mv.as_int;
b += 16;
}
return (cur_mb->bmi + (b - 4))->mv.as_int;
}
static B_PREDICTION_MODE left_block_mode(const MODE_INFO *cur_mb, int b)
{
if (!(b & 3))
{
/* On L edge, get from MB to left of us */
--cur_mb;
switch (cur_mb->mbmi.mode)
{
case B_PRED:
return (cur_mb->bmi + b + 3)->as_mode;
case DC_PRED:
return B_DC_PRED;
case V_PRED:
return B_VE_PRED;
case H_PRED:
return B_HE_PRED;
case TM_PRED:
return B_TM_PRED;
default:
return B_DC_PRED;
}
}
return (cur_mb->bmi + b - 1)->as_mode;
}
static B_PREDICTION_MODE above_block_mode(const MODE_INFO *cur_mb, int b, int mi_stride)
{
if (!(b >> 2))
{
/* On top edge, get from MB above us */
cur_mb -= mi_stride;
switch (cur_mb->mbmi.mode)
{
case B_PRED:
return (cur_mb->bmi + b + 12)->as_mode;
case DC_PRED:
return B_DC_PRED;
case V_PRED:
return B_VE_PRED;
case H_PRED:
return B_HE_PRED;
case TM_PRED:
return B_TM_PRED;
default:
return B_DC_PRED;
}
}
return (cur_mb->bmi + b - 4)->as_mode;
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VP8_COMMON_FINDNEARMV_H_