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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <math.h>
#include "av1/common/common.h"
#include "av1/common/entropymode.h"
#include "av1/encoder/cost.h"
#include "av1/encoder/encodemv.h"
#include "av1/encoder/subexp.h"
#include "aom_dsp/aom_dsp_common.h"
static struct av1_token mv_joint_encodings[MV_JOINTS];
static struct av1_token mv_class_encodings[MV_CLASSES];
static struct av1_token mv_fp_encodings[MV_FP_SIZE];
void av1_entropy_mv_init(void) {
av1_tokens_from_tree(mv_joint_encodings, av1_mv_joint_tree);
av1_tokens_from_tree(mv_class_encodings, av1_mv_class_tree);
av1_tokens_from_tree(mv_fp_encodings, av1_mv_fp_tree);
}
static void encode_mv_component(aom_writer *w, int comp, nmv_component *mvcomp,
MvSubpelPrecision precision) {
int offset;
const int sign = comp < 0;
const int mag = sign ? -comp : comp;
const int mv_class = av1_get_mv_class(mag - 1, &offset);
const int d = offset >> 3; // int mv data
const int fr = (offset >> 1) & 3; // fractional mv data
const int hp = offset & 1; // high precision mv data
assert(comp != 0);
// Sign
#if CONFIG_NEW_MULTISYMBOL
aom_write_bit(w, sign);
#else
aom_write(w, sign, mvcomp->sign);
#endif
// Class
aom_write_symbol(w, mv_class, mvcomp->class_cdf, MV_CLASSES);
// Integer bits
if (mv_class == MV_CLASS_0) {
#if CONFIG_NEW_MULTISYMBOL
aom_write_symbol(w, d, mvcomp->class0_cdf, CLASS0_SIZE);
#else
aom_write(w, d, mvcomp->class0[0]);
#endif
} else {
int i;
const int n = mv_class + CLASS0_BITS - 1; // number of bits
#if CONFIG_NEW_MULTISYMBOL
for (i = 0; i < n; ++i)
aom_write_symbol(w, (d >> i) & 1, mvcomp->bits_cdf[(i + 1) / 2], 2);
#else
for (i = 0; i < n; ++i) aom_write(w, (d >> i) & 1, mvcomp->bits[i]);
#endif
}
// Fractional bits
#if CONFIG_INTRABC || CONFIG_AMVR
if (precision > MV_SUBPEL_NONE)
#endif // CONFIG_INTRABC || CONFIG_AMVR
{
aom_write_symbol(
w, fr,
mv_class == MV_CLASS_0 ? mvcomp->class0_fp_cdf[d] : mvcomp->fp_cdf,
MV_FP_SIZE);
}
// High precision bit
if (precision > MV_SUBPEL_LOW_PRECISION)
#if CONFIG_NEW_MULTISYMBOL
aom_write_symbol(
w, hp, mv_class == MV_CLASS_0 ? mvcomp->class0_hp_cdf : mvcomp->hp_cdf,
2);
#else
aom_write(w, hp, mv_class == MV_CLASS_0 ? mvcomp->class0_hp : mvcomp->hp);
#endif
}
static void build_nmv_component_cost_table(int *mvcost,
const nmv_component *const mvcomp,
MvSubpelPrecision precision) {
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][MV_FP_SIZE], fp_cost[MV_FP_SIZE];
int class0_hp_cost[2], hp_cost[2];
sign_cost[0] = av1_cost_zero(mvcomp->sign);
sign_cost[1] = av1_cost_one(mvcomp->sign);
av1_cost_tokens(class_cost, mvcomp->classes, av1_mv_class_tree);
av1_cost_tokens(class0_cost, mvcomp->class0, av1_mv_class0_tree);
for (i = 0; i < MV_OFFSET_BITS; ++i) {
bits_cost[i][0] = av1_cost_zero(mvcomp->bits[i]);
bits_cost[i][1] = av1_cost_one(mvcomp->bits[i]);
}
for (i = 0; i < CLASS0_SIZE; ++i)
av1_cost_tokens(class0_fp_cost[i], mvcomp->class0_fp[i], av1_mv_fp_tree);
av1_cost_tokens(fp_cost, mvcomp->fp, av1_mv_fp_tree);
if (precision > MV_SUBPEL_LOW_PRECISION) {
class0_hp_cost[0] = av1_cost_zero(mvcomp->class0_hp);
class0_hp_cost[1] = av1_cost_one(mvcomp->class0_hp);
hp_cost[0] = av1_cost_zero(mvcomp->hp);
hp_cost[1] = av1_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 = av1_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 {
const int b = c + CLASS0_BITS - 1; /* number of bits */
for (i = 0; i < b; ++i) cost += bits_cost[i][((d >> i) & 1)];
}
#if CONFIG_INTRABC || CONFIG_AMVR
if (precision > MV_SUBPEL_NONE)
#endif // CONFIG_INTRABC || CONFIG_AMVR
{
if (c == MV_CLASS_0) {
cost += class0_fp_cost[d][f];
} else {
cost += fp_cost[f];
}
if (precision > MV_SUBPEL_LOW_PRECISION) {
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];
}
}
#if !CONFIG_NEW_MULTISYMBOL
static void update_mv(aom_writer *w, const unsigned int ct[2], aom_prob *cur_p,
aom_prob upd_p) {
(void)upd_p;
// Just use the default maximum number of tile groups to avoid passing in the
// actual
// number
av1_cond_prob_diff_update(w, cur_p, ct, DEFAULT_MAX_NUM_TG);
}
void av1_write_nmv_probs(AV1_COMMON *cm, int usehp, aom_writer *w,
nmv_context_counts *const nmv_counts) {
int i;
int nmv_ctx = 0;
#if CONFIG_AMVR
if (cm->cur_frame_force_integer_mv) {
return;
}
#endif
for (nmv_ctx = 0; nmv_ctx < NMV_CONTEXTS; ++nmv_ctx) {
nmv_context *const mvc = &cm->fc->nmvc[nmv_ctx];
nmv_context_counts *const counts = &nmv_counts[nmv_ctx];
if (usehp) {
for (i = 0; i < 2; ++i) {
update_mv(w, counts->comps[i].class0_hp, &mvc->comps[i].class0_hp,
MV_UPDATE_PROB);
update_mv(w, counts->comps[i].hp, &mvc->comps[i].hp, MV_UPDATE_PROB);
}
}
}
}
#endif
void av1_encode_mv(AV1_COMP *cpi, aom_writer *w, const MV *mv, const MV *ref,
nmv_context *mvctx, int usehp) {
const MV diff = { mv->row - ref->row, mv->col - ref->col };
const MV_JOINT_TYPE j = av1_get_mv_joint(&diff);
#if CONFIG_AMVR
if (cpi->common.cur_frame_force_integer_mv) {
usehp = MV_SUBPEL_NONE;
}
#endif
aom_write_symbol(w, j, mvctx->joint_cdf, MV_JOINTS);
if (mv_joint_vertical(j))
encode_mv_component(w, diff.row, &mvctx->comps[0], usehp);
if (mv_joint_horizontal(j))
encode_mv_component(w, diff.col, &mvctx->comps[1], usehp);
// If auto_mv_step_size is enabled then keep track of the largest
// motion vector component used.
if (cpi->sf.mv.auto_mv_step_size) {
unsigned int maxv = AOMMAX(abs(mv->row), abs(mv->col)) >> 3;
cpi->max_mv_magnitude = AOMMAX(maxv, cpi->max_mv_magnitude);
}
}
#if CONFIG_INTRABC
void av1_encode_dv(aom_writer *w, const MV *mv, const MV *ref,
nmv_context *mvctx) {
const MV diff = { mv->row - ref->row, mv->col - ref->col };
const MV_JOINT_TYPE j = av1_get_mv_joint(&diff);
aom_write_symbol(w, j, mvctx->joint_cdf, MV_JOINTS);
if (mv_joint_vertical(j))
encode_mv_component(w, diff.row, &mvctx->comps[0], MV_SUBPEL_NONE);
if (mv_joint_horizontal(j))
encode_mv_component(w, diff.col, &mvctx->comps[1], MV_SUBPEL_NONE);
}
#endif // CONFIG_INTRABC
void av1_build_nmv_cost_table(int *mvjoint, int *mvcost[2],
const nmv_context *ctx,
MvSubpelPrecision precision) {
av1_cost_tokens(mvjoint, ctx->joints, av1_mv_joint_tree);
build_nmv_component_cost_table(mvcost[0], &ctx->comps[0], precision);
build_nmv_component_cost_table(mvcost[1], &ctx->comps[1], precision);
}
static void inc_mvs(const MB_MODE_INFO *mbmi, const MB_MODE_INFO_EXT *mbmi_ext,
const int_mv mvs[2], const int_mv pred_mvs[2],
nmv_context_counts *nmv_counts
#if CONFIG_AMVR
,
MvSubpelPrecision precision
#endif
) {
int i;
PREDICTION_MODE mode = mbmi->mode;
if (mode == NEWMV || mode == NEW_NEWMV) {
for (i = 0; i < 1 + has_second_ref(mbmi); ++i) {
const MV *ref = &mbmi_ext->ref_mvs[mbmi->ref_frame[i]][0].as_mv;
const MV diff = { mvs[i].as_mv.row - ref->row,
mvs[i].as_mv.col - ref->col };
int8_t rf_type = av1_ref_frame_type(mbmi->ref_frame);
int nmv_ctx =
av1_nmv_ctx(mbmi_ext->ref_mv_count[rf_type],
mbmi_ext->ref_mv_stack[rf_type], i, mbmi->ref_mv_idx);
nmv_context_counts *counts = &nmv_counts[nmv_ctx];
(void)pred_mvs;
#if CONFIG_AMVR
av1_inc_mv(&diff, counts, precision);
#else
av1_inc_mv(&diff, counts, 1);
#endif
}
} else if (mode == NEAREST_NEWMV || mode == NEAR_NEWMV) {
const MV *ref = &mbmi_ext->ref_mvs[mbmi->ref_frame[1]][0].as_mv;
const MV diff = { mvs[1].as_mv.row - ref->row,
mvs[1].as_mv.col - ref->col };
int8_t rf_type = av1_ref_frame_type(mbmi->ref_frame);
int nmv_ctx =
av1_nmv_ctx(mbmi_ext->ref_mv_count[rf_type],
mbmi_ext->ref_mv_stack[rf_type], 1, mbmi->ref_mv_idx);
nmv_context_counts *counts = &nmv_counts[nmv_ctx];
#if CONFIG_AMVR
av1_inc_mv(&diff, counts, precision);
#else
av1_inc_mv(&diff, counts, 1);
#endif
} else if (mode == NEW_NEARESTMV || mode == NEW_NEARMV) {
const MV *ref = &mbmi_ext->ref_mvs[mbmi->ref_frame[0]][0].as_mv;
const MV diff = { mvs[0].as_mv.row - ref->row,
mvs[0].as_mv.col - ref->col };
int8_t rf_type = av1_ref_frame_type(mbmi->ref_frame);
int nmv_ctx =
av1_nmv_ctx(mbmi_ext->ref_mv_count[rf_type],
mbmi_ext->ref_mv_stack[rf_type], 0, mbmi->ref_mv_idx);
nmv_context_counts *counts = &nmv_counts[nmv_ctx];
#if CONFIG_AMVR
av1_inc_mv(&diff, counts, precision);
#else
av1_inc_mv(&diff, counts, 1);
#endif
#if CONFIG_COMPOUND_SINGLEREF
} else {
assert( // mode == SR_NEAREST_NEWMV ||
mode == SR_NEAR_NEWMV || mode == SR_ZERO_NEWMV || mode == SR_NEW_NEWMV);
const MV *ref = &mbmi_ext->ref_mvs[mbmi->ref_frame[0]][0].as_mv;
int8_t rf_type = av1_ref_frame_type(mbmi->ref_frame);
int nmv_ctx =
av1_nmv_ctx(mbmi_ext->ref_mv_count[rf_type],
mbmi_ext->ref_mv_stack[rf_type], 0, mbmi->ref_mv_idx);
nmv_context_counts *counts = &nmv_counts[nmv_ctx];
(void)pred_mvs;
MV diff;
if (mode == SR_NEW_NEWMV) {
diff.row = mvs[0].as_mv.row - ref->row;
diff.col = mvs[0].as_mv.col - ref->col;
av1_inc_mv(&diff, counts, 1);
}
diff.row = mvs[1].as_mv.row - ref->row;
diff.col = mvs[1].as_mv.col - ref->col;
av1_inc_mv(&diff, counts, 1);
#endif // CONFIG_COMPOUND_SINGLEREF
}
}
void av1_update_mv_count(ThreadData *td) {
const MACROBLOCKD *xd = &td->mb.e_mbd;
const MODE_INFO *mi = xd->mi[0];
const MB_MODE_INFO *const mbmi = &mi->mbmi;
const MB_MODE_INFO_EXT *mbmi_ext = td->mb.mbmi_ext;
#if CONFIG_AMVR
MvSubpelPrecision precision = 1;
if (xd->cur_frame_force_integer_mv) {
precision = MV_SUBPEL_NONE;
}
#endif
if (have_newmv_in_inter_mode(mbmi->mode))
#if CONFIG_AMVR
inc_mvs(mbmi, mbmi_ext, mbmi->mv, mbmi->pred_mv, td->counts->mv, precision);
#else
inc_mvs(mbmi, mbmi_ext, mbmi->mv, mbmi->pred_mv, td->counts->mv);
#endif
}