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/*
* 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.
*/
#include <limits.h>
#include "vp9/common/vp9_findnearmv.h"
#include "vp9/common/vp9_mvref_common.h"
#include "vp9/common/vp9_sadmxn.h"
#include "vp9/common/vp9_subpelvar.h"
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);
if (mv->as_mv.col & 1)
mv->as_mv.col += (mv->as_mv.col > 0 ? -1 : 1);
}
}
vp9_prob *vp9_mv_ref_probs(VP9_COMMON *pc, vp9_prob *p, int context) {
p[0] = pc->fc.inter_mode_probs[context][0];
p[1] = pc->fc.inter_mode_probs[context][1];
p[2] = pc->fc.inter_mode_probs[context][2];
return p;
}
void vp9_find_best_ref_mvs(MACROBLOCKD *xd,
int_mv *mvlist,
int_mv *nearest,
int_mv *near) {
int i;
// Make sure all the candidates are properly clamped etc
for (i = 0; i < MAX_MV_REF_CANDIDATES; ++i) {
lower_mv_precision(&mvlist[i], xd->allow_high_precision_mv);
clamp_mv2(&mvlist[i], xd);
}
*nearest = mvlist[0];
*near = mvlist[1];
}
void vp9_append_sub8x8_mvs_for_idx(VP9_COMMON *cm, MACROBLOCKD *xd,
int_mv *dst_nearest,
int_mv *dst_near,
int block_idx, int ref_idx) {
int_mv dst_list[MAX_MV_REF_CANDIDATES];
int_mv mv_list[MAX_MV_REF_CANDIDATES];
MODE_INFO *mi = xd->mode_info_context;
MB_MODE_INFO *const mbmi = &mi->mbmi;
assert(ref_idx == 0 || ref_idx == 1);
assert(MAX_MV_REF_CANDIDATES == 2); // makes code here slightly easier
vp9_find_mv_refs_idx(cm, xd, xd->mode_info_context,
xd->prev_mode_info_context,
mbmi->ref_frame[ref_idx],
mv_list, cm->ref_frame_sign_bias, block_idx);
dst_list[1].as_int = 0;
if (block_idx == 0) {
memcpy(dst_list, mv_list, MAX_MV_REF_CANDIDATES * sizeof(int_mv));
} else if (block_idx == 1 || block_idx == 2) {
int dst = 0, n;
union b_mode_info *bmi = mi->bmi;
dst_list[dst++].as_int = bmi[0].as_mv[ref_idx].as_int;
for (n = 0; dst < MAX_MV_REF_CANDIDATES &&
n < MAX_MV_REF_CANDIDATES; n++)
if (mv_list[n].as_int != dst_list[0].as_int)
dst_list[dst++].as_int = mv_list[n].as_int;
} else {
int dst = 0, n;
union b_mode_info *bmi = mi->bmi;
assert(block_idx == 3);
dst_list[dst++].as_int = bmi[2].as_mv[ref_idx].as_int;
if (dst_list[0].as_int != bmi[1].as_mv[ref_idx].as_int)
dst_list[dst++].as_int = bmi[1].as_mv[ref_idx].as_int;
if (dst < MAX_MV_REF_CANDIDATES &&
dst_list[0].as_int != bmi[0].as_mv[ref_idx].as_int)
dst_list[dst++].as_int = bmi[0].as_mv[ref_idx].as_int;
for (n = 0; dst < MAX_MV_REF_CANDIDATES &&
n < MAX_MV_REF_CANDIDATES; n++)
if (mv_list[n].as_int != dst_list[0].as_int)
dst_list[dst++].as_int = mv_list[n].as_int;
}
dst_nearest->as_int = dst_list[0].as_int;
dst_near->as_int = dst_list[1].as_int;
}
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