ref: a46ca6ec00aa0a8bdb0e0fff4ddd2db4257b3cbf
dir: /vp9/common/vp9_entropymv.c/
/*
* 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_onyxc_int.h"
#include "vp9/common/vp9_entropymv.h"
#define MV_COUNT_SAT 20
#define MV_MAX_UPDATE_FACTOR 128
// Integer pel reference mv threshold for use of high-precision 1/8 mv
#define COMPANDED_MVREF_THRESH 8
const vp9_tree_index vp9_mv_joint_tree[TREE_SIZE(MV_JOINTS)] = {
-MV_JOINT_ZERO, 2,
-MV_JOINT_HNZVZ, 4,
-MV_JOINT_HZVNZ, -MV_JOINT_HNZVNZ
};
const vp9_tree_index vp9_mv_class_tree[TREE_SIZE(MV_CLASSES)] = {
-MV_CLASS_0, 2,
-MV_CLASS_1, 4,
6, 8,
-MV_CLASS_2, -MV_CLASS_3,
10, 12,
-MV_CLASS_4, -MV_CLASS_5,
-MV_CLASS_6, 14,
16, 18,
-MV_CLASS_7, -MV_CLASS_8,
-MV_CLASS_9, -MV_CLASS_10,
};
const vp9_tree_index vp9_mv_class0_tree[TREE_SIZE(CLASS0_SIZE)] = {
-0, -1,
};
const vp9_tree_index vp9_mv_fp_tree[TREE_SIZE(MV_FP_SIZE)] = {
-0, 2,
-1, 4,
-2, -3
};
static const nmv_context default_nmv_context = {
{32, 64, 96},
{
{ // Vertical component
128, // sign
{224, 144, 192, 168, 192, 176, 192, 198, 198, 245}, // class
{216}, // class0
{136, 140, 148, 160, 176, 192, 224, 234, 234, 240}, // bits
{{128, 128, 64}, {96, 112, 64}}, // class0_fp
{64, 96, 64}, // fp
160, // class0_hp bit
128, // hp
},
{ // Horizontal component
128, // sign
{216, 128, 176, 160, 176, 176, 192, 198, 198, 208}, // class
{208}, // class0
{136, 140, 148, 160, 176, 192, 224, 234, 234, 240}, // bits
{{128, 128, 64}, {96, 112, 64}}, // class0_fp
{64, 96, 64}, // fp
160, // class0_hp bit
128, // hp
}
},
};
static const uint8_t log_in_base_2[] = {
0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10
};
static INLINE int mv_class_base(MV_CLASS_TYPE c) {
return c ? CLASS0_SIZE << (c + 2) : 0;
}
MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset) {
const MV_CLASS_TYPE c = (z >= CLASS0_SIZE * 4096) ?
MV_CLASS_10 : (MV_CLASS_TYPE)log_in_base_2[z >> 3];
if (offset)
*offset = z - mv_class_base(c);
return c;
}
int vp9_use_mv_hp(const MV *ref) {
return (abs(ref->row) >> 3) < COMPANDED_MVREF_THRESH &&
(abs(ref->col) >> 3) < COMPANDED_MVREF_THRESH;
}
int vp9_get_mv_mag(MV_CLASS_TYPE c, int offset) {
return mv_class_base(c) + offset;
}
static void inc_mv_component(int v, nmv_component_counts *comp_counts,
int incr, int usehp) {
int s, z, c, o, d, e, f;
assert(v != 0); /* should not be zero */
s = v < 0;
comp_counts->sign[s] += incr;
z = (s ? -v : v) - 1; /* magnitude - 1 */
c = vp9_get_mv_class(z, &o);
comp_counts->classes[c] += incr;
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) {
comp_counts->class0[d] += incr;
comp_counts->class0_fp[d][f] += incr;
comp_counts->class0_hp[e] += usehp * incr;
} else {
int i;
int b = c + CLASS0_BITS - 1; // number of bits
for (i = 0; i < b; ++i)
comp_counts->bits[i][((d >> i) & 1)] += incr;
comp_counts->fp[f] += incr;
comp_counts->hp[e] += usehp * incr;
}
}
void vp9_inc_mv(const MV *mv, nmv_context_counts *counts) {
if (counts != NULL) {
const MV_JOINT_TYPE j = vp9_get_mv_joint(mv);
++counts->joints[j];
if (mv_joint_vertical(j)) {
inc_mv_component(mv->row, &counts->comps[0], 1, 1);
}
if (mv_joint_horizontal(j)) {
inc_mv_component(mv->col, &counts->comps[1], 1, 1);
}
}
}
static vp9_prob adapt_prob(vp9_prob prep, const unsigned int ct[2]) {
return merge_probs(prep, ct, MV_COUNT_SAT, MV_MAX_UPDATE_FACTOR);
}
static void adapt_probs(const vp9_tree_index *tree, const vp9_prob *pre_probs,
const unsigned int *counts, vp9_prob *probs) {
vp9_tree_merge_probs(tree, pre_probs, counts, MV_COUNT_SAT,
MV_MAX_UPDATE_FACTOR, probs);
}
void vp9_adapt_mv_probs(VP9_COMMON *cm, int allow_hp) {
int i, j;
nmv_context *fc = &cm->fc.nmvc;
const nmv_context *pre_fc = &cm->frame_contexts[cm->frame_context_idx].nmvc;
const nmv_context_counts *counts = &cm->counts.mv;
adapt_probs(vp9_mv_joint_tree, pre_fc->joints, counts->joints, fc->joints);
for (i = 0; i < 2; ++i) {
nmv_component *comp = &fc->comps[i];
const nmv_component *pre_comp = &pre_fc->comps[i];
const nmv_component_counts *c = &counts->comps[i];
comp->sign = adapt_prob(pre_comp->sign, c->sign);
adapt_probs(vp9_mv_class_tree, pre_comp->classes, c->classes,
comp->classes);
adapt_probs(vp9_mv_class0_tree, pre_comp->class0, c->class0, comp->class0);
for (j = 0; j < MV_OFFSET_BITS; ++j)
comp->bits[j] = adapt_prob(pre_comp->bits[j], c->bits[j]);
for (j = 0; j < CLASS0_SIZE; ++j)
adapt_probs(vp9_mv_fp_tree, pre_comp->class0_fp[j], c->class0_fp[j],
comp->class0_fp[j]);
adapt_probs(vp9_mv_fp_tree, pre_comp->fp, c->fp, comp->fp);
if (allow_hp) {
comp->class0_hp = adapt_prob(pre_comp->class0_hp, c->class0_hp);
comp->hp = adapt_prob(pre_comp->hp, c->hp);
}
}
}
void vp9_init_mv_probs(VP9_COMMON *cm) {
cm->fc.nmvc = default_nmv_context;
}