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vpx/vp9/encoder/vp9_encodemv.c
Dmitry Kovalev 0db175ffed Changing argument type of vp9_get_mv_joint from MV to MV*. 
Change-Id: I28c3026946fc1bde7074e6e0198da93bb0d75dfe
2013-04-17 11:21:28 -07:00

633 lines
21 KiB
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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 "vp9/common/vp9_common.h"
#include "vp9/encoder/vp9_encodemv.h"
#include "vp9/common/vp9_entropymode.h"
#include "vp9/common/vp9_systemdependent.h"
#include <math.h>
#ifdef ENTROPY_STATS
extern unsigned int active_section;
#endif
#ifdef NMV_STATS
nmv_context_counts tnmvcounts;
#endif
static void encode_nmv_component(vp9_writer* const bc,
int v,
int r,
const nmv_component* const mvcomp) {
int s, z, c, o, d;
assert (v != 0); /* should not be zero */
s = v < 0;
vp9_write(bc, s, mvcomp->sign);
z = (s ? -v : v) - 1; /* magnitude - 1 */
c = vp9_get_mv_class(z, &o);
write_token(bc, vp9_mv_class_tree, mvcomp->classes,
vp9_mv_class_encodings + c);
d = (o >> 3); /* int mv data */
if (c == MV_CLASS_0) {
write_token(bc, vp9_mv_class0_tree, mvcomp->class0,
vp9_mv_class0_encodings + d);
} else {
int i, b;
b = c + CLASS0_BITS - 1; /* number of bits */
for (i = 0; i < b; ++i)
vp9_write(bc, ((d >> i) & 1), mvcomp->bits[i]);
}
}
static void encode_nmv_component_fp(vp9_writer *bc,
int v,
int r,
const nmv_component* const mvcomp,
int usehp) {
int s, z, c, o, d, f, e;
assert (v != 0); /* should not be zero */
s = v < 0;
z = (s ? -v : v) - 1; /* magnitude - 1 */
c = vp9_get_mv_class(z, &o);
d = (o >> 3); /* int mv data */
f = (o >> 1) & 3; /* fractional pel mv data */
e = (o & 1); /* high precision mv data */
/* Code the fractional pel bits */
if (c == MV_CLASS_0) {
write_token(bc, vp9_mv_fp_tree, mvcomp->class0_fp[d],
vp9_mv_fp_encodings + f);
} else {
write_token(bc, vp9_mv_fp_tree, mvcomp->fp,
vp9_mv_fp_encodings + f);
}
/* Code the high precision bit */
if (usehp) {
if (c == MV_CLASS_0) {
vp9_write(bc, e, mvcomp->class0_hp);
} else {
vp9_write(bc, e, mvcomp->hp);
}
}
}
static void build_nmv_component_cost_table(int *mvcost,
const nmv_component* const mvcomp,
int usehp) {
int i, v;
int sign_cost[2], class_cost[MV_CLASSES], class0_cost[CLASS0_SIZE];
int bits_cost[MV_OFFSET_BITS][2];
int class0_fp_cost[CLASS0_SIZE][4], fp_cost[4];
int class0_hp_cost[2], hp_cost[2];
sign_cost[0] = vp9_cost_zero(mvcomp->sign);
sign_cost[1] = vp9_cost_one(mvcomp->sign);
vp9_cost_tokens(class_cost, mvcomp->classes, vp9_mv_class_tree);
vp9_cost_tokens(class0_cost, mvcomp->class0, vp9_mv_class0_tree);
for (i = 0; i < MV_OFFSET_BITS; ++i) {
bits_cost[i][0] = vp9_cost_zero(mvcomp->bits[i]);
bits_cost[i][1] = vp9_cost_one(mvcomp->bits[i]);
}
for (i = 0; i < CLASS0_SIZE; ++i)
vp9_cost_tokens(class0_fp_cost[i], mvcomp->class0_fp[i], vp9_mv_fp_tree);
vp9_cost_tokens(fp_cost, mvcomp->fp, vp9_mv_fp_tree);
if (usehp) {
class0_hp_cost[0] = vp9_cost_zero(mvcomp->class0_hp);
class0_hp_cost[1] = vp9_cost_one(mvcomp->class0_hp);
hp_cost[0] = vp9_cost_zero(mvcomp->hp);
hp_cost[1] = vp9_cost_one(mvcomp->hp);
}
mvcost[0] = 0;
for (v = 1; v <= MV_MAX; ++v) {
int z, c, o, d, e, f, cost = 0;
z = v - 1;
c = vp9_get_mv_class(z, &o);
cost += class_cost[c];
d = (o >> 3); /* int mv data */
f = (o >> 1) & 3; /* fractional pel mv data */
e = (o & 1); /* high precision mv data */
if (c == MV_CLASS_0) {
cost += class0_cost[d];
} else {
int i, b;
b = c + CLASS0_BITS - 1; /* number of bits */
for (i = 0; i < b; ++i)
cost += bits_cost[i][((d >> i) & 1)];
}
if (c == MV_CLASS_0) {
cost += class0_fp_cost[d][f];
} else {
cost += fp_cost[f];
}
if (usehp) {
if (c == MV_CLASS_0) {
cost += class0_hp_cost[e];
} else {
cost += hp_cost[e];
}
}
mvcost[v] = cost + sign_cost[0];
mvcost[-v] = cost + sign_cost[1];
}
}
static int update_nmv_savings(const unsigned int ct[2],
const vp9_prob cur_p,
const vp9_prob new_p,
const vp9_prob upd_p) {
#ifdef LOW_PRECISION_MV_UPDATE
vp9_prob mod_p = new_p | 1;
#else
vp9_prob mod_p = new_p;
#endif
const int cur_b = cost_branch256(ct, cur_p);
const int mod_b = cost_branch256(ct, mod_p);
const int cost = 7 * 256 +
#ifndef LOW_PRECISION_MV_UPDATE
256 +
#endif
(vp9_cost_one(upd_p) - vp9_cost_zero(upd_p));
if (cur_b - mod_b - cost > 0) {
return cur_b - mod_b - cost;
} else {
return 0 - vp9_cost_zero(upd_p);
}
}
static int update_nmv(
vp9_writer *const bc,
const unsigned int ct[2],
vp9_prob *const cur_p,
const vp9_prob new_p,
const vp9_prob upd_p) {
#ifdef LOW_PRECISION_MV_UPDATE
vp9_prob mod_p = new_p | 1;
#else
vp9_prob mod_p = new_p;
#endif
const int cur_b = cost_branch256(ct, *cur_p);
const int mod_b = cost_branch256(ct, mod_p);
const int cost = 7 * 256 +
#ifndef LOW_PRECISION_MV_UPDATE
256 +
#endif
(vp9_cost_one(upd_p) - vp9_cost_zero(upd_p));
if (cur_b - mod_b > cost) {
*cur_p = mod_p;
vp9_write(bc, 1, upd_p);
#ifdef LOW_PRECISION_MV_UPDATE
vp9_write_literal(bc, mod_p >> 1, 7);
#else
vp9_write_literal(bc, mod_p, 8);
#endif
return 1;
} else {
vp9_write(bc, 0, upd_p);
return 0;
}
}
void print_nmvcounts(nmv_context_counts tnmvcounts) {
int i, j, k;
printf("\nCounts =\n { ");
for (j = 0; j < MV_JOINTS; ++j)
printf("%d, ", tnmvcounts.joints[j]);
printf("},\n");
for (i = 0; i < 2; ++i) {
printf(" {\n");
printf(" %d/%d,\n", tnmvcounts.comps[i].sign[0],
tnmvcounts.comps[i].sign[1]);
printf(" { ");
for (j = 0; j < MV_CLASSES; ++j)
printf("%d, ", tnmvcounts.comps[i].classes[j]);
printf("},\n");
printf(" { ");
for (j = 0; j < CLASS0_SIZE; ++j)
printf("%d, ", tnmvcounts.comps[i].class0[j]);
printf("},\n");
printf(" { ");
for (j = 0; j < MV_OFFSET_BITS; ++j)
printf("%d/%d, ", tnmvcounts.comps[i].bits[j][0],
tnmvcounts.comps[i].bits[j][1]);
printf("},\n");
printf(" {");
for (j = 0; j < CLASS0_SIZE; ++j) {
printf("{");
for (k = 0; k < 4; ++k)
printf("%d, ", tnmvcounts.comps[i].class0_fp[j][k]);
printf("}, ");
}
printf("},\n");
printf(" { ");
for (j = 0; j < 4; ++j)
printf("%d, ", tnmvcounts.comps[i].fp[j]);
printf("},\n");
printf(" %d/%d,\n",
tnmvcounts.comps[i].class0_hp[0],
tnmvcounts.comps[i].class0_hp[1]);
printf(" %d/%d,\n",
tnmvcounts.comps[i].hp[0],
tnmvcounts.comps[i].hp[1]);
printf(" },\n");
}
}
#ifdef NMV_STATS
void init_nmvstats() {
vp9_zero(tnmvcounts);
}
void print_nmvstats() {
nmv_context prob;
unsigned int branch_ct_joint[MV_JOINTS - 1][2];
unsigned int branch_ct_sign[2][2];
unsigned int branch_ct_classes[2][MV_CLASSES - 1][2];
unsigned int branch_ct_class0[2][CLASS0_SIZE - 1][2];
unsigned int branch_ct_bits[2][MV_OFFSET_BITS][2];
unsigned int branch_ct_class0_fp[2][CLASS0_SIZE][4 - 1][2];
unsigned int branch_ct_fp[2][4 - 1][2];
unsigned int branch_ct_class0_hp[2][2];
unsigned int branch_ct_hp[2][2];
int i, j, k;
vp9_counts_to_nmv_context(&tnmvcounts, &prob, 1,
branch_ct_joint, branch_ct_sign, branch_ct_classes,
branch_ct_class0, branch_ct_bits,
branch_ct_class0_fp, branch_ct_fp,
branch_ct_class0_hp, branch_ct_hp);
printf("\nCounts =\n { ");
for (j = 0; j < MV_JOINTS; ++j)
printf("%d, ", tnmvcounts.joints[j]);
printf("},\n");
for (i = 0; i < 2; ++i) {
printf(" {\n");
printf(" %d/%d,\n", tnmvcounts.comps[i].sign[0],
tnmvcounts.comps[i].sign[1]);
printf(" { ");
for (j = 0; j < MV_CLASSES; ++j)
printf("%d, ", tnmvcounts.comps[i].classes[j]);
printf("},\n");
printf(" { ");
for (j = 0; j < CLASS0_SIZE; ++j)
printf("%d, ", tnmvcounts.comps[i].class0[j]);
printf("},\n");
printf(" { ");
for (j = 0; j < MV_OFFSET_BITS; ++j)
printf("%d/%d, ", tnmvcounts.comps[i].bits[j][0],
tnmvcounts.comps[i].bits[j][1]);
printf("},\n");
printf(" {");
for (j = 0; j < CLASS0_SIZE; ++j) {
printf("{");
for (k = 0; k < 4; ++k)
printf("%d, ", tnmvcounts.comps[i].class0_fp[j][k]);
printf("}, ");
}
printf("},\n");
printf(" { ");
for (j = 0; j < 4; ++j)
printf("%d, ", tnmvcounts.comps[i].fp[j]);
printf("},\n");
printf(" %d/%d,\n",
tnmvcounts.comps[i].class0_hp[0],
tnmvcounts.comps[i].class0_hp[1]);
printf(" %d/%d,\n",
tnmvcounts.comps[i].hp[0],
tnmvcounts.comps[i].hp[1]);
printf(" },\n");
}
printf("\nProbs =\n { ");
for (j = 0; j < MV_JOINTS - 1; ++j)
printf("%d, ", prob.joints[j]);
printf("},\n");
for (i=0; i< 2; ++i) {
printf(" {\n");
printf(" %d,\n", prob.comps[i].sign);
printf(" { ");
for (j = 0; j < MV_CLASSES - 1; ++j)
printf("%d, ", prob.comps[i].classes[j]);
printf("},\n");
printf(" { ");
for (j = 0; j < CLASS0_SIZE - 1; ++j)
printf("%d, ", prob.comps[i].class0[j]);
printf("},\n");
printf(" { ");
for (j = 0; j < MV_OFFSET_BITS; ++j)
printf("%d, ", prob.comps[i].bits[j]);
printf("},\n");
printf(" { ");
for (j = 0; j < CLASS0_SIZE; ++j) {
printf("{");
for (k = 0; k < 3; ++k)
printf("%d, ", prob.comps[i].class0_fp[j][k]);
printf("}, ");
}
printf("},\n");
printf(" { ");
for (j = 0; j < 3; ++j)
printf("%d, ", prob.comps[i].fp[j]);
printf("},\n");
printf(" %d,\n", prob.comps[i].class0_hp);
printf(" %d,\n", prob.comps[i].hp);
printf(" },\n");
}
}
static void add_nmvcount(nmv_context_counts* const dst,
const nmv_context_counts* const src) {
int i, j, k;
for (j = 0; j < MV_JOINTS; ++j) {
dst->joints[j] += src->joints[j];
}
for (i = 0; i < 2; ++i) {
for (j = 0; j < MV_VALS; ++j) {
dst->comps[i].mvcount[j] += src->comps[i].mvcount[j];
}
dst->comps[i].sign[0] += src->comps[i].sign[0];
dst->comps[i].sign[1] += src->comps[i].sign[1];
for (j = 0; j < MV_CLASSES; ++j) {
dst->comps[i].classes[j] += src->comps[i].classes[j];
}
for (j = 0; j < CLASS0_SIZE; ++j) {
dst->comps[i].class0[j] += src->comps[i].class0[j];
}
for (j = 0; j < MV_OFFSET_BITS; ++j) {
dst->comps[i].bits[j][0] += src->comps[i].bits[j][0];
dst->comps[i].bits[j][1] += src->comps[i].bits[j][1];
}
}
for (i = 0; i < 2; ++i) {
for (j = 0; j < CLASS0_SIZE; ++j) {
for (k = 0; k < 4; ++k) {
dst->comps[i].class0_fp[j][k] += src->comps[i].class0_fp[j][k];
}
}
for (j = 0; j < 4; ++j) {
dst->comps[i].fp[j] += src->comps[i].fp[j];
}
dst->comps[i].class0_hp[0] += src->comps[i].class0_hp[0];
dst->comps[i].class0_hp[1] += src->comps[i].class0_hp[1];
dst->comps[i].hp[0] += src->comps[i].hp[0];
dst->comps[i].hp[1] += src->comps[i].hp[1];
}
}
#endif
void vp9_write_nmv_probs(VP9_COMP* const cpi, int usehp, vp9_writer* const bc) {
int i, j;
nmv_context prob;
unsigned int branch_ct_joint[MV_JOINTS - 1][2];
unsigned int branch_ct_sign[2][2];
unsigned int branch_ct_classes[2][MV_CLASSES - 1][2];
unsigned int branch_ct_class0[2][CLASS0_SIZE - 1][2];
unsigned int branch_ct_bits[2][MV_OFFSET_BITS][2];
unsigned int branch_ct_class0_fp[2][CLASS0_SIZE][4 - 1][2];
unsigned int branch_ct_fp[2][4 - 1][2];
unsigned int branch_ct_class0_hp[2][2];
unsigned int branch_ct_hp[2][2];
#ifdef MV_GROUP_UPDATE
int savings = 0;
#endif
#ifdef NMV_STATS
if (!cpi->dummy_packing)
add_nmvcount(&tnmvcounts, &cpi->NMVcount);
#endif
vp9_counts_to_nmv_context(&cpi->NMVcount, &prob, usehp,
branch_ct_joint, branch_ct_sign, branch_ct_classes,
branch_ct_class0, branch_ct_bits,
branch_ct_class0_fp, branch_ct_fp,
branch_ct_class0_hp, branch_ct_hp);
/* write updates if they help */
#ifdef MV_GROUP_UPDATE
for (j = 0; j < MV_JOINTS - 1; ++j) {
savings += update_nmv_savings(branch_ct_joint[j],
cpi->common.fc.nmvc.joints[j],
prob.joints[j],
VP9_NMV_UPDATE_PROB);
}
for (i = 0; i < 2; ++i) {
savings += update_nmv_savings(branch_ct_sign[i],
cpi->common.fc.nmvc.comps[i].sign,
prob.comps[i].sign,
VP9_NMV_UPDATE_PROB);
for (j = 0; j < MV_CLASSES - 1; ++j) {
savings += update_nmv_savings(branch_ct_classes[i][j],
cpi->common.fc.nmvc.comps[i].classes[j],
prob.comps[i].classes[j],
VP9_NMV_UPDATE_PROB);
}
for (j = 0; j < CLASS0_SIZE - 1; ++j) {
savings += update_nmv_savings(branch_ct_class0[i][j],
cpi->common.fc.nmvc.comps[i].class0[j],
prob.comps[i].class0[j],
VP9_NMV_UPDATE_PROB);
}
for (j = 0; j < MV_OFFSET_BITS; ++j) {
savings += update_nmv_savings(branch_ct_bits[i][j],
cpi->common.fc.nmvc.comps[i].bits[j],
prob.comps[i].bits[j],
VP9_NMV_UPDATE_PROB);
}
}
for (i = 0; i < 2; ++i) {
for (j = 0; j < CLASS0_SIZE; ++j) {
int k;
for (k = 0; k < 3; ++k) {
savings += update_nmv_savings(branch_ct_class0_fp[i][j][k],
cpi->common.fc.nmvc.comps[i].class0_fp[j][k],
prob.comps[i].class0_fp[j][k],
VP9_NMV_UPDATE_PROB);
}
}
for (j = 0; j < 3; ++j) {
savings += update_nmv_savings(branch_ct_fp[i][j],
cpi->common.fc.nmvc.comps[i].fp[j],
prob.comps[i].fp[j],
VP9_NMV_UPDATE_PROB);
}
}
if (usehp) {
for (i = 0; i < 2; ++i) {
savings += update_nmv_savings(branch_ct_class0_hp[i],
cpi->common.fc.nmvc.comps[i].class0_hp,
prob.comps[i].class0_hp,
VP9_NMV_UPDATE_PROB);
savings += update_nmv_savings(branch_ct_hp[i],
cpi->common.fc.nmvc.comps[i].hp,
prob.comps[i].hp,
VP9_NMV_UPDATE_PROB);
}
}
if (savings <= 0) {
vp9_write_bit(bc, 0);
return;
}
vp9_write_bit(bc, 1);
#endif
for (j = 0; j < MV_JOINTS - 1; ++j) {
update_nmv(bc, branch_ct_joint[j],
&cpi->common.fc.nmvc.joints[j],
prob.joints[j],
VP9_NMV_UPDATE_PROB);
}
for (i = 0; i < 2; ++i) {
update_nmv(bc, branch_ct_sign[i],
&cpi->common.fc.nmvc.comps[i].sign,
prob.comps[i].sign,
VP9_NMV_UPDATE_PROB);
for (j = 0; j < MV_CLASSES - 1; ++j) {
update_nmv(bc, branch_ct_classes[i][j],
&cpi->common.fc.nmvc.comps[i].classes[j],
prob.comps[i].classes[j],
VP9_NMV_UPDATE_PROB);
}
for (j = 0; j < CLASS0_SIZE - 1; ++j) {
update_nmv(bc, branch_ct_class0[i][j],
&cpi->common.fc.nmvc.comps[i].class0[j],
prob.comps[i].class0[j],
VP9_NMV_UPDATE_PROB);
}
for (j = 0; j < MV_OFFSET_BITS; ++j) {
update_nmv(bc, branch_ct_bits[i][j],
&cpi->common.fc.nmvc.comps[i].bits[j],
prob.comps[i].bits[j],
VP9_NMV_UPDATE_PROB);
}
}
for (i = 0; i < 2; ++i) {
for (j = 0; j < CLASS0_SIZE; ++j) {
int k;
for (k = 0; k < 3; ++k) {
update_nmv(bc, branch_ct_class0_fp[i][j][k],
&cpi->common.fc.nmvc.comps[i].class0_fp[j][k],
prob.comps[i].class0_fp[j][k],
VP9_NMV_UPDATE_PROB);
}
}
for (j = 0; j < 3; ++j) {
update_nmv(bc, branch_ct_fp[i][j],
&cpi->common.fc.nmvc.comps[i].fp[j],
prob.comps[i].fp[j],
VP9_NMV_UPDATE_PROB);
}
}
if (usehp) {
for (i = 0; i < 2; ++i) {
update_nmv(bc, branch_ct_class0_hp[i],
&cpi->common.fc.nmvc.comps[i].class0_hp,
prob.comps[i].class0_hp,
VP9_NMV_UPDATE_PROB);
update_nmv(bc, branch_ct_hp[i],
&cpi->common.fc.nmvc.comps[i].hp,
prob.comps[i].hp,
VP9_NMV_UPDATE_PROB);
}
}
}
void vp9_encode_nmv(vp9_writer* w, const MV* const mv,
const MV* const ref, const nmv_context* const mvctx) {
const MV_JOINT_TYPE j = vp9_get_mv_joint(mv);
write_token(w, vp9_mv_joint_tree, mvctx->joints, vp9_mv_joint_encodings + j);
if (mv_joint_vertical(j))
encode_nmv_component(w, mv->row, ref->col, &mvctx->comps[0]);
if (mv_joint_horizontal(j))
encode_nmv_component(w, mv->col, ref->col, &mvctx->comps[1]);
}
void vp9_encode_nmv_fp(vp9_writer* const bc, const MV* const mv,
const MV* const ref, const nmv_context* const mvctx,
int usehp) {
const MV_JOINT_TYPE j = vp9_get_mv_joint(mv);
usehp = usehp && vp9_use_nmv_hp(ref);
if (mv_joint_vertical(j))
encode_nmv_component_fp(bc, mv->row, ref->row, &mvctx->comps[0], usehp);
if (mv_joint_horizontal(j))
encode_nmv_component_fp(bc, mv->col, ref->col, &mvctx->comps[1], usehp);
}
void vp9_build_nmv_cost_table(int *mvjoint,
int *mvcost[2],
const nmv_context* const mvctx,
int usehp,
int mvc_flag_v,
int mvc_flag_h) {
vp9_clear_system_state();
vp9_cost_tokens(mvjoint, mvctx->joints, vp9_mv_joint_tree);
if (mvc_flag_v)
build_nmv_component_cost_table(mvcost[0], &mvctx->comps[0], usehp);
if (mvc_flag_h)
build_nmv_component_cost_table(mvcost[1], &mvctx->comps[1], usehp);
}
void vp9_update_nmv_count(VP9_COMP *cpi, MACROBLOCK *x,
int_mv *best_ref_mv, int_mv *second_best_ref_mv) {
MB_MODE_INFO * mbmi = &x->e_mbd.mode_info_context->mbmi;
MV mv;
if (mbmi->mode == SPLITMV) {
int i;
PARTITION_INFO *pi = x->partition_info;
for (i = 0; i < pi->count; i++) {
if (pi->bmi[i].mode == NEW4X4) {
mv.row = (pi->bmi[i].mv.as_mv.row - best_ref_mv->as_mv.row);
mv.col = (pi->bmi[i].mv.as_mv.col - best_ref_mv->as_mv.col);
vp9_increment_nmv(&mv, &best_ref_mv->as_mv, &cpi->NMVcount,
x->e_mbd.allow_high_precision_mv);
if (x->e_mbd.mode_info_context->mbmi.second_ref_frame > 0) {
mv.row = pi->bmi[i].second_mv.as_mv.row -
second_best_ref_mv->as_mv.row;
mv.col = pi->bmi[i].second_mv.as_mv.col -
second_best_ref_mv->as_mv.col;
vp9_increment_nmv(&mv, &second_best_ref_mv->as_mv, &cpi->NMVcount,
x->e_mbd.allow_high_precision_mv);
}
}
}
} else if (mbmi->mode == NEWMV) {
mv.row = (mbmi->mv[0].as_mv.row - best_ref_mv->as_mv.row);
mv.col = (mbmi->mv[0].as_mv.col - best_ref_mv->as_mv.col);
vp9_increment_nmv(&mv, &best_ref_mv->as_mv, &cpi->NMVcount,
x->e_mbd.allow_high_precision_mv);
if (mbmi->second_ref_frame > 0) {
mv.row = (mbmi->mv[1].as_mv.row - second_best_ref_mv->as_mv.row);
mv.col = (mbmi->mv[1].as_mv.col - second_best_ref_mv->as_mv.col);
vp9_increment_nmv(&mv, &second_best_ref_mv->as_mv, &cpi->NMVcount,
x->e_mbd.allow_high_precision_mv);
}
}
}
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