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vpx/vp9/encoder/bitstream.c
Deb Mukherjee d01357bbad New b-intra mode where direction is contextual 
Preliminary patch on a new 4x4 intra mode B_CONTEXT_PRED where the
dominant direction from the context is used to encode. Various decoder
changes are needed to support decoding of B_CONTEXT_PRED in conjunction
with hybrid transforms since the scan order and tokenization depends on
the actual direction of prediction obtained from the context. Currently
the traditional directional modes are used in conjunction with the
B_CONTEXT_PRED, which also seems to provide the best results.

The gains are small - in the 0.1% range.

Change-Id: I5a7ea80b5218f42a9c0dfb42d3f79a68c7f0cdc2
2012-11-10 07:12:30 -08:00

2382 lines
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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/header.h"
#include "encodemv.h"
#include "vp9/common/entropymode.h"
#include "vp9/common/findnearmv.h"
#include "mcomp.h"
#include "vp9/common/systemdependent.h"
#include <assert.h>
#include <stdio.h>
#include <limits.h>
#include "vp9/common/pragmas.h"
#include "vpx/vpx_encoder.h"
#include "vpx_mem/vpx_mem.h"
#include "bitstream.h"
#include "segmentation.h"
#include "vp9/common/seg_common.h"
#include "vp9/common/pred_common.h"
#include "vp9/common/entropy.h"
#include "vp9/encoder/encodemv.h"
#include "vp9/common/entropymv.h"
#include "vp9/common/mvref_common.h"
#if defined(SECTIONBITS_OUTPUT)
unsigned __int64 Sectionbits[500];
#endif
#ifdef ENTROPY_STATS
int intra_mode_stats[VP9_KF_BINTRAMODES]
[VP9_KF_BINTRAMODES]
[VP9_KF_BINTRAMODES];
unsigned int tree_update_hist [BLOCK_TYPES]
[COEF_BANDS]
[PREV_COEF_CONTEXTS]
[ENTROPY_NODES][2];
unsigned int hybrid_tree_update_hist [BLOCK_TYPES]
[COEF_BANDS]
[PREV_COEF_CONTEXTS]
[ENTROPY_NODES][2];
unsigned int tree_update_hist_8x8 [BLOCK_TYPES_8X8]
[COEF_BANDS]
[PREV_COEF_CONTEXTS]
[ENTROPY_NODES] [2];
unsigned int hybrid_tree_update_hist_8x8 [BLOCK_TYPES_8X8]
[COEF_BANDS]
[PREV_COEF_CONTEXTS]
[ENTROPY_NODES] [2];
unsigned int tree_update_hist_16x16 [BLOCK_TYPES_16X16]
[COEF_BANDS]
[PREV_COEF_CONTEXTS]
[ENTROPY_NODES] [2];
unsigned int hybrid_tree_update_hist_16x16 [BLOCK_TYPES_16X16]
[COEF_BANDS]
[PREV_COEF_CONTEXTS]
[ENTROPY_NODES] [2];
extern unsigned int active_section;
#endif
#ifdef MODE_STATS
int count_mb_seg[4] = { 0, 0, 0, 0 };
#endif
#define vp9_cost_upd ((int)(vp9_cost_one(upd) - vp9_cost_zero(upd)) >> 8)
#define vp9_cost_upd256 ((int)(vp9_cost_one(upd) - vp9_cost_zero(upd)))
#define SEARCH_NEWP
static int update_bits[255];
static void compute_update_table() {
int i;
for (i = 0; i < 255; i++)
update_bits[i] = vp9_count_term_subexp(i, SUBEXP_PARAM, 255);
}
static int split_index(int i, int n, int modulus) {
int max1 = (n - 1 - modulus / 2) / modulus + 1;
if (i % modulus == modulus / 2) i = i / modulus;
else i = max1 + i - (i + modulus - modulus / 2) / modulus;
return i;
}
static int remap_prob(int v, int m) {
const int n = 256;
const int modulus = MODULUS_PARAM;
int i;
if ((m << 1) <= n)
i = vp9_recenter_nonneg(v, m) - 1;
else
i = vp9_recenter_nonneg(n - 1 - v, n - 1 - m) - 1;
i = split_index(i, n - 1, modulus);
return i;
}
static void write_prob_diff_update(vp9_writer *const bc,
vp9_prob newp, vp9_prob oldp) {
int delp = remap_prob(newp, oldp);
vp9_encode_term_subexp(bc, delp, SUBEXP_PARAM, 255);
}
static int prob_diff_update_cost(vp9_prob newp, vp9_prob oldp) {
int delp = remap_prob(newp, oldp);
return update_bits[delp] * 256;
}
static void update_mode(
vp9_writer *const bc,
int n,
vp9_token tok [/* n */],
vp9_tree tree,
vp9_prob Pnew [/* n-1 */],
vp9_prob Pcur [/* n-1 */],
unsigned int bct [/* n-1 */] [2],
const unsigned int num_events[/* n */]
) {
unsigned int new_b = 0, old_b = 0;
int i = 0;
vp9_tree_probs_from_distribution(
n--, tok, tree,
Pnew, bct, num_events,
256, 1
);
do {
new_b += cost_branch(bct[i], Pnew[i]);
old_b += cost_branch(bct[i], Pcur[i]);
} while (++i < n);
if (new_b + (n << 8) < old_b) {
int i = 0;
vp9_write_bit(bc, 1);
do {
const vp9_prob p = Pnew[i];
vp9_write_literal(bc, Pcur[i] = p ? p : 1, 8);
} while (++i < n);
} else
vp9_write_bit(bc, 0);
}
static void update_mbintra_mode_probs(VP9_COMP* const cpi,
vp9_writer* const bc) {
VP9_COMMON *const cm = &cpi->common;
{
vp9_prob Pnew [VP9_YMODES - 1];
unsigned int bct [VP9_YMODES - 1] [2];
update_mode(
bc, VP9_YMODES, vp9_ymode_encodings, vp9_ymode_tree,
Pnew, cm->fc.ymode_prob, bct, (unsigned int *)cpi->ymode_count
);
}
}
static int get_prob(int num, int den) {
int p;
if (den <= 0)
return 128;
p = (num * 255 + (den >> 1)) / den;
if (p > 255)
return 255;
else if (p < 1)
return 1;
return p;
}
static int get_binary_prob(int n0, int n1) {
return get_prob(n0, n0 + n1);
}
void vp9_update_skip_probs(VP9_COMP *cpi) {
VP9_COMMON *const pc = &cpi->common;
int k;
for (k = 0; k < MBSKIP_CONTEXTS; ++k) {
pc->mbskip_pred_probs[k] = get_binary_prob(cpi->skip_false_count[k],
cpi->skip_true_count[k]);
}
}
static void update_switchable_interp_probs(VP9_COMP *cpi,
vp9_writer* const bc) {
VP9_COMMON *const pc = &cpi->common;
unsigned int branch_ct[32][2];
int i, j;
for (j = 0; j <= VP9_SWITCHABLE_FILTERS; ++j) {
vp9_tree_probs_from_distribution(
VP9_SWITCHABLE_FILTERS,
vp9_switchable_interp_encodings, vp9_switchable_interp_tree,
pc->fc.switchable_interp_prob[j], branch_ct,
cpi->switchable_interp_count[j], 256, 1);
for (i = 0; i < VP9_SWITCHABLE_FILTERS - 1; ++i) {
if (pc->fc.switchable_interp_prob[j][i] < 1)
pc->fc.switchable_interp_prob[j][i] = 1;
vp9_write_literal(bc, pc->fc.switchable_interp_prob[j][i], 8);
}
}
}
// This function updates the reference frame prediction stats
static void update_refpred_stats(VP9_COMP *cpi) {
VP9_COMMON *const cm = &cpi->common;
int i;
vp9_prob new_pred_probs[PREDICTION_PROBS];
int old_cost, new_cost;
// Set the prediction probability structures to defaults
if (cm->frame_type == KEY_FRAME) {
// Set the prediction probabilities to defaults
cm->ref_pred_probs[0] = 120;
cm->ref_pred_probs[1] = 80;
cm->ref_pred_probs[2] = 40;
vpx_memset(cpi->ref_pred_probs_update, 0,
sizeof(cpi->ref_pred_probs_update));
} else {
// From the prediction counts set the probabilities for each context
for (i = 0; i < PREDICTION_PROBS; i++) {
new_pred_probs[i] = get_binary_prob(cpi->ref_pred_count[i][0],
cpi->ref_pred_count[i][1]);
// Decide whether or not to update the reference frame probs.
// Returned costs are in 1/256 bit units.
old_cost =
(cpi->ref_pred_count[i][0] * vp9_cost_zero(cm->ref_pred_probs[i])) +
(cpi->ref_pred_count[i][1] * vp9_cost_one(cm->ref_pred_probs[i]));
new_cost =
(cpi->ref_pred_count[i][0] * vp9_cost_zero(new_pred_probs[i])) +
(cpi->ref_pred_count[i][1] * vp9_cost_one(new_pred_probs[i]));
// Cost saving must be >= 8 bits (2048 in these units)
if ((old_cost - new_cost) >= 2048) {
cpi->ref_pred_probs_update[i] = 1;
cm->ref_pred_probs[i] = new_pred_probs[i];
} else
cpi->ref_pred_probs_update[i] = 0;
}
}
}
static void update_mvcount(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;
for (i = 0; i < x->partition_info->count; i++) {
if (x->partition_info->bmi[i].mode == NEW4X4) {
if (x->e_mbd.allow_high_precision_mv) {
mv.row = (x->partition_info->bmi[i].mv.as_mv.row
- best_ref_mv->as_mv.row);
mv.col = (x->partition_info->bmi[i].mv.as_mv.col
- best_ref_mv->as_mv.col);
vp9_increment_nmv(&mv, &best_ref_mv->as_mv, &cpi->NMVcount, 1);
if (x->e_mbd.mode_info_context->mbmi.second_ref_frame) {
mv.row = (x->partition_info->bmi[i].second_mv.as_mv.row
- second_best_ref_mv->as_mv.row);
mv.col = (x->partition_info->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, 1);
}
} else {
mv.row = (x->partition_info->bmi[i].mv.as_mv.row
- best_ref_mv->as_mv.row);
mv.col = (x->partition_info->bmi[i].mv.as_mv.col
- best_ref_mv->as_mv.col);
vp9_increment_nmv(&mv, &best_ref_mv->as_mv, &cpi->NMVcount, 0);
if (x->e_mbd.mode_info_context->mbmi.second_ref_frame) {
mv.row = (x->partition_info->bmi[i].second_mv.as_mv.row
- second_best_ref_mv->as_mv.row);
mv.col = (x->partition_info->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, 0);
}
}
}
}
} else if (mbmi->mode == NEWMV) {
if (x->e_mbd.allow_high_precision_mv) {
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, 1);
if (mbmi->second_ref_frame) {
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, 1);
}
} else {
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, 0);
if (mbmi->second_ref_frame) {
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, 0);
}
}
}
}
static void write_ymode(vp9_writer *bc, int m, const vp9_prob *p) {
write_token(bc, vp9_ymode_tree, p, vp9_ymode_encodings + m);
}
static void kfwrite_ymode(vp9_writer *bc, int m, const vp9_prob *p) {
write_token(bc, vp9_kf_ymode_tree, p, vp9_kf_ymode_encodings + m);
}
#if CONFIG_SUPERBLOCKS
static void sb_kfwrite_ymode(vp9_writer *bc, int m, const vp9_prob *p) {
write_token(bc, vp9_uv_mode_tree, p, vp9_sb_kf_ymode_encodings + m);
}
#endif
static void write_i8x8_mode(vp9_writer *bc, int m, const vp9_prob *p) {
write_token(bc, vp9_i8x8_mode_tree, p, vp9_i8x8_mode_encodings + m);
}
static void write_uv_mode(vp9_writer *bc, int m, const vp9_prob *p) {
write_token(bc, vp9_uv_mode_tree, p, vp9_uv_mode_encodings + m);
}
static void write_bmode(vp9_writer *bc, int m, const vp9_prob *p) {
#if CONFIG_NEWBINTRAMODES
assert(m < B_CONTEXT_PRED - CONTEXT_PRED_REPLACEMENTS || m == B_CONTEXT_PRED);
if (m == B_CONTEXT_PRED) m -= CONTEXT_PRED_REPLACEMENTS;
#endif
write_token(bc, vp9_bmode_tree, p, vp9_bmode_encodings + m);
}
static void write_kf_bmode(vp9_writer *bc, int m, const vp9_prob *p) {
write_token(bc, vp9_kf_bmode_tree, p, vp9_kf_bmode_encodings + m);
}
static void write_split(vp9_writer *bc, int x, const vp9_prob *p) {
write_token(
bc, vp9_mbsplit_tree, p, vp9_mbsplit_encodings + x);
}
static int prob_update_savings(const unsigned int *ct,
const vp9_prob oldp, const vp9_prob newp,
const vp9_prob upd) {
const int old_b = cost_branch256(ct, oldp);
const int new_b = cost_branch256(ct, newp);
const int update_b = 2048 + vp9_cost_upd256;
return (old_b - new_b - update_b);
}
static int prob_diff_update_savings(const unsigned int *ct,
const vp9_prob oldp, const vp9_prob newp,
const vp9_prob upd) {
const int old_b = cost_branch256(ct, oldp);
const int new_b = cost_branch256(ct, newp);
const int update_b = (newp == oldp ? 0 :
prob_diff_update_cost(newp, oldp) + vp9_cost_upd256);
return (old_b - new_b - update_b);
}
static int prob_diff_update_savings_search(const unsigned int *ct,
const vp9_prob oldp, vp9_prob *bestp,
const vp9_prob upd) {
const int old_b = cost_branch256(ct, oldp);
int new_b, update_b, savings, bestsavings, step;
vp9_prob newp, bestnewp;
bestsavings = 0;
bestnewp = oldp;
step = (*bestp > oldp ? -1 : 1);
for (newp = *bestp; newp != oldp; newp += step) {
new_b = cost_branch256(ct, newp);
update_b = prob_diff_update_cost(newp, oldp) + vp9_cost_upd256;
savings = old_b - new_b - update_b;
if (savings > bestsavings) {
bestsavings = savings;
bestnewp = newp;
}
}
*bestp = bestnewp;
return bestsavings;
}
static void pack_mb_tokens(vp9_writer* const bc,
TOKENEXTRA **tp,
const TOKENEXTRA *const stop) {
unsigned int split;
unsigned int shift;
int count = bc->count;
unsigned int range = bc->range;
unsigned int lowvalue = bc->lowvalue;
TOKENEXTRA *p = *tp;
while (p < stop) {
const int t = p->Token;
vp9_token *const a = vp9_coef_encodings + t;
const vp9_extra_bit_struct *const b = vp9_extra_bits + t;
int i = 0;
const unsigned char *pp = p->context_tree;
int v = a->value;
int n = a->Len;
if (t == EOSB_TOKEN)
{
++p;
break;
}
/* skip one or two nodes */
if (p->skip_eob_node) {
n -= p->skip_eob_node;
i = 2 * p->skip_eob_node;
}
do {
const int bb = (v >> --n) & 1;
split = 1 + (((range - 1) * pp[i >> 1]) >> 8);
i = vp9_coef_tree[i + bb];
if (bb) {
lowvalue += split;
range = range - split;
} else {
range = split;
}
shift = vp9_norm[range];
range <<= shift;
count += shift;
if (count >= 0) {
int offset = shift - count;
if ((lowvalue << (offset - 1)) & 0x80000000) {
int x = bc->pos - 1;
while (x >= 0 && bc->buffer[x] == 0xff) {
bc->buffer[x] = (unsigned char)0;
x--;
}
bc->buffer[x] += 1;
}
bc->buffer[bc->pos++] = (lowvalue >> (24 - offset));
lowvalue <<= offset;
shift = count;
lowvalue &= 0xffffff;
count -= 8;
}
lowvalue <<= shift;
} while (n);
if (b->base_val) {
const int e = p->Extra, L = b->Len;
if (L) {
const unsigned char *pp = b->prob;
int v = e >> 1;
int n = L; /* number of bits in v, assumed nonzero */
int i = 0;
do {
const int bb = (v >> --n) & 1;
split = 1 + (((range - 1) * pp[i >> 1]) >> 8);
i = b->tree[i + bb];
if (bb) {
lowvalue += split;
range = range - split;
} else {
range = split;
}
shift = vp9_norm[range];
range <<= shift;
count += shift;
if (count >= 0) {
int offset = shift - count;
if ((lowvalue << (offset - 1)) & 0x80000000) {
int x = bc->pos - 1;
while (x >= 0 && bc->buffer[x] == 0xff) {
bc->buffer[x] = (unsigned char)0;
x--;
}
bc->buffer[x] += 1;
}
bc->buffer[bc->pos++] = (lowvalue >> (24 - offset));
lowvalue <<= offset;
shift = count;
lowvalue &= 0xffffff;
count -= 8;
}
lowvalue <<= shift;
} while (n);
}
{
split = (range + 1) >> 1;
if (e & 1) {
lowvalue += split;
range = range - split;
} else {
range = split;
}
range <<= 1;
if ((lowvalue & 0x80000000)) {
int x = bc->pos - 1;
while (x >= 0 && bc->buffer[x] == 0xff) {
bc->buffer[x] = (unsigned char)0;
x--;
}
bc->buffer[x] += 1;
}
lowvalue <<= 1;
if (!++count) {
count = -8;
bc->buffer[bc->pos++] = (lowvalue >> 24);
lowvalue &= 0xffffff;
}
}
}
++p;
}
bc->count = count;
bc->lowvalue = lowvalue;
bc->range = range;
*tp = p;
}
static void write_partition_size(unsigned char *cx_data, int size) {
signed char csize;
csize = size & 0xff;
*cx_data = csize;
csize = (size >> 8) & 0xff;
*(cx_data + 1) = csize;
csize = (size >> 16) & 0xff;
*(cx_data + 2) = csize;
}
static void write_mv_ref
(
vp9_writer *bc, MB_PREDICTION_MODE m, const vp9_prob *p
) {
#if CONFIG_DEBUG
assert(NEARESTMV <= m && m <= SPLITMV);
#endif
write_token(bc, vp9_mv_ref_tree, p,
vp9_mv_ref_encoding_array - NEARESTMV + m);
}
#if CONFIG_SUPERBLOCKS
static void write_sb_mv_ref(vp9_writer *bc, MB_PREDICTION_MODE m,
const vp9_prob *p) {
#if CONFIG_DEBUG
assert(NEARESTMV <= m && m < SPLITMV);
#endif
write_token(bc, vp9_sb_mv_ref_tree, p,
vp9_sb_mv_ref_encoding_array - NEARESTMV + m);
}
#endif
static void write_sub_mv_ref
(
vp9_writer *bc, B_PREDICTION_MODE m, const vp9_prob *p
) {
#if CONFIG_DEBUG
assert(LEFT4X4 <= m && m <= NEW4X4);
#endif
write_token(bc, vp9_sub_mv_ref_tree, p,
vp9_sub_mv_ref_encoding_array - LEFT4X4 + m);
}
static void write_nmv(vp9_writer *bc, const MV *mv, const int_mv *ref,
const nmv_context *nmvc, int usehp) {
MV e;
e.row = mv->row - ref->as_mv.row;
e.col = mv->col - ref->as_mv.col;
vp9_encode_nmv(bc, &e, &ref->as_mv, nmvc);
vp9_encode_nmv_fp(bc, &e, &ref->as_mv, nmvc, usehp);
}
#if CONFIG_NEW_MVREF
static int vp9_cost_mv_ref_id(vp9_prob * ref_id_probs, int mv_ref_id) {
int cost;
// Encode the index for the MV reference.
switch (mv_ref_id) {
case 0:
cost = vp9_cost_zero(ref_id_probs[0]);
break;
case 1:
cost = vp9_cost_one(ref_id_probs[0]);
cost += vp9_cost_zero(ref_id_probs[1]);
break;
case 2:
cost = vp9_cost_one(ref_id_probs[0]);
cost += vp9_cost_one(ref_id_probs[1]);
cost += vp9_cost_zero(ref_id_probs[2]);
break;
case 3:
cost = vp9_cost_one(ref_id_probs[0]);
cost += vp9_cost_one(ref_id_probs[1]);
cost += vp9_cost_one(ref_id_probs[2]);
break;
// TRAP.. This should not happen
default:
assert(0);
break;
}
return cost;
}
static void vp9_write_mv_ref_id(vp9_writer *w,
vp9_prob * ref_id_probs,
int mv_ref_id) {
// Encode the index for the MV reference.
switch (mv_ref_id) {
case 0:
vp9_write(w, 0, ref_id_probs[0]);
break;
case 1:
vp9_write(w, 1, ref_id_probs[0]);
vp9_write(w, 0, ref_id_probs[1]);
break;
case 2:
vp9_write(w, 1, ref_id_probs[0]);
vp9_write(w, 1, ref_id_probs[1]);
vp9_write(w, 0, ref_id_probs[2]);
break;
case 3:
vp9_write(w, 1, ref_id_probs[0]);
vp9_write(w, 1, ref_id_probs[1]);
vp9_write(w, 1, ref_id_probs[2]);
break;
// TRAP.. This should not happen
default:
assert(0);
break;
}
}
// Estimate the cost of each coding the vector using each reference candidate
static unsigned int pick_best_mv_ref(MACROBLOCK *x,
MV_REFERENCE_FRAME ref_frame,
int_mv target_mv,
int_mv * mv_ref_list,
int_mv * best_ref) {
int i;
int best_index = 0;
int cost, cost2;
int zero_seen = (mv_ref_list[0].as_int) ? FALSE : TRUE;
MACROBLOCKD *xd = &x->e_mbd;
int max_mv = MV_MAX;
cost = vp9_cost_mv_ref_id(xd->mb_mv_ref_id_probs[ref_frame], 0) +
vp9_mv_bit_cost(&target_mv, &mv_ref_list[0], x->nmvjointcost,
x->mvcost, 96, xd->allow_high_precision_mv);
// Use 4 for now : for (i = 1; i < MAX_MV_REFS; ++i ) {
for (i = 1; i < 4; ++i) {
// If we see a 0,0 reference vector for a second time we have reached
// the end of the list of valid candidate vectors.
if (!mv_ref_list[i].as_int)
if (zero_seen)
break;
else
zero_seen = TRUE;
// Check for cases where the reference choice would give rise to an
// uncodable/out of range residual for row or col.
if ((abs(target_mv.as_mv.row - mv_ref_list[i].as_mv.row) > max_mv) ||
(abs(target_mv.as_mv.col - mv_ref_list[i].as_mv.col) > max_mv)) {
continue;
}
cost2 = vp9_cost_mv_ref_id(xd->mb_mv_ref_id_probs[ref_frame], i) +
vp9_mv_bit_cost(&target_mv, &mv_ref_list[i], x->nmvjointcost,
x->mvcost, 96, xd->allow_high_precision_mv);
if (cost2 < cost) {
cost = cost2;
best_index = i;
}
}
(*best_ref).as_int = mv_ref_list[best_index].as_int;
return best_index;
}
#endif
// This function writes the current macro block's segnment id to the bitstream
// It should only be called if a segment map update is indicated.
static void write_mb_segid(vp9_writer *bc,
const MB_MODE_INFO *mi, const MACROBLOCKD *xd) {
// Encode the MB segment id.
int seg_id = mi->segment_id;
#if CONFIG_SUPERBLOCKS
if (mi->encoded_as_sb) {
if (xd->mb_to_right_edge > 0)
seg_id = seg_id && xd->mode_info_context[1].mbmi.segment_id;
if (xd->mb_to_bottom_edge > 0) {
seg_id = seg_id &&
xd->mode_info_context[xd->mode_info_stride].mbmi.segment_id;
if (xd->mb_to_right_edge > 0)
seg_id = seg_id &&
xd->mode_info_context[xd->mode_info_stride + 1].mbmi.segment_id;
}
}
#endif
if (xd->segmentation_enabled && xd->update_mb_segmentation_map) {
switch (seg_id) {
case 0:
vp9_write(bc, 0, xd->mb_segment_tree_probs[0]);
vp9_write(bc, 0, xd->mb_segment_tree_probs[1]);
break;
case 1:
vp9_write(bc, 0, xd->mb_segment_tree_probs[0]);
vp9_write(bc, 1, xd->mb_segment_tree_probs[1]);
break;
case 2:
vp9_write(bc, 1, xd->mb_segment_tree_probs[0]);
vp9_write(bc, 0, xd->mb_segment_tree_probs[2]);
break;
case 3:
vp9_write(bc, 1, xd->mb_segment_tree_probs[0]);
vp9_write(bc, 1, xd->mb_segment_tree_probs[2]);
break;
// TRAP.. This should not happen
default:
vp9_write(bc, 0, xd->mb_segment_tree_probs[0]);
vp9_write(bc, 0, xd->mb_segment_tree_probs[1]);
break;
}
}
}
// This function encodes the reference frame
static void encode_ref_frame(vp9_writer *const bc,
VP9_COMMON *const cm,
MACROBLOCKD *xd,
int segment_id,
MV_REFERENCE_FRAME rf) {
int seg_ref_active;
int seg_ref_count = 0;
seg_ref_active = vp9_segfeature_active(xd,
segment_id,
SEG_LVL_REF_FRAME);
if (seg_ref_active) {
seg_ref_count = vp9_check_segref(xd, segment_id, INTRA_FRAME) +
vp9_check_segref(xd, segment_id, LAST_FRAME) +
vp9_check_segref(xd, segment_id, GOLDEN_FRAME) +
vp9_check_segref(xd, segment_id, ALTREF_FRAME);
}
// If segment level coding of this signal is disabled...
// or the segment allows multiple reference frame options
if (!seg_ref_active || (seg_ref_count > 1)) {
// Values used in prediction model coding
unsigned char prediction_flag;
vp9_prob pred_prob;
MV_REFERENCE_FRAME pred_rf;
// Get the context probability the prediction flag
pred_prob = vp9_get_pred_prob(cm, xd, PRED_REF);
// Get the predicted value.
pred_rf = vp9_get_pred_ref(cm, xd);
// Did the chosen reference frame match its predicted value.
prediction_flag =
(xd->mode_info_context->mbmi.ref_frame == pred_rf);
vp9_set_pred_flag(xd, PRED_REF, prediction_flag);
vp9_write(bc, prediction_flag, pred_prob);
// If not predicted correctly then code value explicitly
if (!prediction_flag) {
vp9_prob mod_refprobs[PREDICTION_PROBS];
vpx_memcpy(mod_refprobs,
cm->mod_refprobs[pred_rf], sizeof(mod_refprobs));
// If segment coding enabled blank out options that cant occur by
// setting the branch probability to 0.
if (seg_ref_active) {
mod_refprobs[INTRA_FRAME] *=
vp9_check_segref(xd, segment_id, INTRA_FRAME);
mod_refprobs[LAST_FRAME] *=
vp9_check_segref(xd, segment_id, LAST_FRAME);
mod_refprobs[GOLDEN_FRAME] *=
(vp9_check_segref(xd, segment_id, GOLDEN_FRAME) *
vp9_check_segref(xd, segment_id, ALTREF_FRAME));
}
if (mod_refprobs[0]) {
vp9_write(bc, (rf != INTRA_FRAME), mod_refprobs[0]);
}
// Inter coded
if (rf != INTRA_FRAME) {
if (mod_refprobs[1]) {
vp9_write(bc, (rf != LAST_FRAME), mod_refprobs[1]);
}
if (rf != LAST_FRAME) {
if (mod_refprobs[2]) {
vp9_write(bc, (rf != GOLDEN_FRAME), mod_refprobs[2]);
}
}
}
}
}
// if using the prediction mdoel we have nothing further to do because
// the reference frame is fully coded by the segment
}
// Update the probabilities used to encode reference frame data
static void update_ref_probs(VP9_COMP *const cpi) {
VP9_COMMON *const cm = &cpi->common;
const int *const rfct = cpi->count_mb_ref_frame_usage;
const int rf_intra = rfct[INTRA_FRAME];
const int rf_inter = rfct[LAST_FRAME] +
rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME];
cm->prob_intra_coded = get_binary_prob(rf_intra, rf_inter);
cm->prob_last_coded = get_prob(rfct[LAST_FRAME], rf_inter);
cm->prob_gf_coded = get_binary_prob(rfct[GOLDEN_FRAME], rfct[ALTREF_FRAME]);
// Compute a modified set of probabilities to use when prediction of the
// reference frame fails
vp9_compute_mod_refprobs(cm);
}
static void pack_inter_mode_mvs(VP9_COMP *const cpi, vp9_writer *const bc) {
VP9_COMMON *const pc = &cpi->common;
const nmv_context *nmvc = &pc->fc.nmvc;
MACROBLOCK *x = &cpi->mb;
MACROBLOCKD *xd = &cpi->mb.e_mbd;
MODE_INFO *m;
MODE_INFO *prev_m;
TOKENEXTRA *tok = cpi->tok;
TOKENEXTRA *tok_end = tok + cpi->tok_count;
const int mis = pc->mode_info_stride;
int mb_row, mb_col;
int row, col;
// Values used in prediction model coding
vp9_prob pred_prob;
unsigned char prediction_flag;
int row_delta[4] = { 0, +1, 0, -1};
int col_delta[4] = { +1, -1, +1, +1};
cpi->mb.partition_info = cpi->mb.pi;
mb_row = 0;
for (row = 0; row < pc->mb_rows; row += 2) {
m = pc->mi + row * mis;
prev_m = pc->prev_mi + row * mis;
mb_col = 0;
for (col = 0; col < pc->mb_cols; col += 2) {
int i;
// Process the 4 MBs in the order:
// top-left, top-right, bottom-left, bottom-right
#if CONFIG_SUPERBLOCKS
vp9_write(bc, m->mbmi.encoded_as_sb, pc->sb_coded);
#endif
for (i = 0; i < 4; i++) {
MB_MODE_INFO *mi;
MV_REFERENCE_FRAME rf;
MB_PREDICTION_MODE mode;
int segment_id, skip_coeff;
int dy = row_delta[i];
int dx = col_delta[i];
int offset_extended = dy * mis + dx;
if ((mb_row >= pc->mb_rows) || (mb_col >= pc->mb_cols)) {
// MB lies outside frame, move on
mb_row += dy;
mb_col += dx;
m += offset_extended;
prev_m += offset_extended;
cpi->mb.partition_info += offset_extended;
continue;
}
mi = &m->mbmi;
rf = mi->ref_frame;
mode = mi->mode;
segment_id = mi->segment_id;
// Distance of Mb to the various image edges.
// These specified to 8th pel as they are always compared to MV
// values that are in 1/8th pel units
xd->mb_to_left_edge = -((mb_col * 16) << 3);
xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
xd->mb_to_top_edge = -((mb_row * 16)) << 3;
xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
// Make sure the MacroBlockD mode info pointer is set correctly
xd->mode_info_context = m;
xd->prev_mode_info_context = prev_m;
#ifdef ENTROPY_STATS
active_section = 9;
#endif
if (cpi->mb.e_mbd.update_mb_segmentation_map) {
// Is temporal coding of the segment map enabled
if (pc->temporal_update) {
prediction_flag = vp9_get_pred_flag(xd, PRED_SEG_ID);
pred_prob = vp9_get_pred_prob(pc, xd, PRED_SEG_ID);
// Code the segment id prediction flag for this mb
vp9_write(bc, prediction_flag, pred_prob);
// If the mb segment id wasn't predicted code explicitly
if (!prediction_flag)
write_mb_segid(bc, mi, &cpi->mb.e_mbd);
} else {
// Normal unpredicted coding
write_mb_segid(bc, mi, &cpi->mb.e_mbd);
}
}
skip_coeff = 1;
if (pc->mb_no_coeff_skip &&
(!vp9_segfeature_active(xd, segment_id, SEG_LVL_EOB) ||
(vp9_get_segdata(xd, segment_id, SEG_LVL_EOB) != 0))) {
skip_coeff = mi->mb_skip_coeff;
#if CONFIG_SUPERBLOCKS
if (mi->encoded_as_sb) {
skip_coeff &= m[1].mbmi.mb_skip_coeff;
skip_coeff &= m[mis].mbmi.mb_skip_coeff;
skip_coeff &= m[mis + 1].mbmi.mb_skip_coeff;
}
#endif
vp9_write(bc, skip_coeff,
vp9_get_pred_prob(pc, xd, PRED_MBSKIP));
}
// Encode the reference frame.
encode_ref_frame(bc, pc, xd, segment_id, rf);
if (rf == INTRA_FRAME) {
#ifdef ENTROPY_STATS
active_section = 6;
#endif
// TODO(rbultje) write using SB tree structure
if (!vp9_segfeature_active(xd, segment_id, SEG_LVL_MODE)) {
write_ymode(bc, mode, pc->fc.ymode_prob);
}
if (mode == B_PRED) {
int j = 0;
#if CONFIG_COMP_INTRA_PRED
int uses_second =
m->bmi[0].as_mode.second !=
(B_PREDICTION_MODE)(B_DC_PRED - 1);
vp9_write(bc, uses_second, DEFAULT_COMP_INTRA_PROB);
#endif
do {
#if CONFIG_COMP_INTRA_PRED
B_PREDICTION_MODE mode2 = m->bmi[j].as_mode.second;
#endif
write_bmode(bc, m->bmi[j].as_mode.first,
pc->fc.bmode_prob);
#if CONFIG_COMP_INTRA_PRED
if (uses_second) {
write_bmode(bc, mode2, pc->fc.bmode_prob);
}
#endif
} while (++j < 16);
}
if (mode == I8X8_PRED) {
write_i8x8_mode(bc, m->bmi[0].as_mode.first,
pc->fc.i8x8_mode_prob);
write_i8x8_mode(bc, m->bmi[2].as_mode.first,
pc->fc.i8x8_mode_prob);
write_i8x8_mode(bc, m->bmi[8].as_mode.first,
pc->fc.i8x8_mode_prob);
write_i8x8_mode(bc, m->bmi[10].as_mode.first,
pc->fc.i8x8_mode_prob);
} else {
write_uv_mode(bc, mi->uv_mode,
pc->fc.uv_mode_prob[mode]);
}
} else {
int_mv best_mv, best_second_mv;
int ct[4];
vp9_prob mv_ref_p [VP9_MVREFS - 1];
{
int_mv n1, n2;
// Only used for context just now and soon to be deprecated.
vp9_find_near_mvs(xd, m, prev_m, &n1, &n2, &best_mv, ct,
rf, cpi->common.ref_frame_sign_bias);
best_mv.as_int = mi->ref_mvs[rf][0].as_int;
vp9_mv_ref_probs(&cpi->common, mv_ref_p, ct);
#ifdef ENTROPY_STATS
accum_mv_refs(mode, ct);
#endif
}
#ifdef ENTROPY_STATS
active_section = 3;
#endif
// Is the segment coding of mode enabled
if (!vp9_segfeature_active(xd, segment_id, SEG_LVL_MODE)) {
#if CONFIG_SUPERBLOCKS
if (mi->encoded_as_sb) {
write_sb_mv_ref(bc, mode, mv_ref_p);
} else
#endif
{
write_mv_ref(bc, mode, mv_ref_p);
}
vp9_accum_mv_refs(&cpi->common, mode, ct);
}
#if CONFIG_PRED_FILTER
// Is the prediction filter enabled
if (mode >= NEARESTMV && mode < SPLITMV) {
if (cpi->common.pred_filter_mode == 2)
vp9_write(bc, mi->pred_filter_enabled,
pc->prob_pred_filter_off);
else
assert(mi->pred_filter_enabled ==
cpi->common.pred_filter_mode);
}
#endif
if (mode >= NEARESTMV && mode <= SPLITMV)
{
if (cpi->common.mcomp_filter_type == SWITCHABLE) {
write_token(bc, vp9_switchable_interp_tree,
vp9_get_pred_probs(&cpi->common, xd,
PRED_SWITCHABLE_INTERP),
vp9_switchable_interp_encodings +
vp9_switchable_interp_map[mi->interp_filter]);
} else {
assert (mi->interp_filter ==
cpi->common.mcomp_filter_type);
}
}
if (mi->second_ref_frame &&
(mode == NEWMV || mode == SPLITMV)) {
int_mv n1, n2;
// Only used for context just now and soon to be deprecated.
vp9_find_near_mvs(xd, m, prev_m,
&n1, &n2, &best_second_mv, ct,
mi->second_ref_frame,
cpi->common.ref_frame_sign_bias);
best_second_mv.as_int =
mi->ref_mvs[mi->second_ref_frame][0].as_int;
}
// does the feature use compound prediction or not
// (if not specified at the frame/segment level)
if (cpi->common.comp_pred_mode == HYBRID_PREDICTION) {
vp9_write(bc, mi->second_ref_frame != INTRA_FRAME,
vp9_get_pred_prob(pc, xd, PRED_COMP));
}
{
switch (mode) { /* new, split require MVs */
case NEWMV:
#ifdef ENTROPY_STATS
active_section = 5;
#endif
#if CONFIG_NEW_MVREF
{
unsigned int best_index;
// Choose the best mv reference
best_index = pick_best_mv_ref(x, rf, mi->mv[0],
mi->ref_mvs[rf], &best_mv);
// Encode the index of the choice.
vp9_write_mv_ref_id(bc,
xd->mb_mv_ref_id_probs[rf], best_index);
cpi->best_ref_index_counts[rf][best_index]++;
}
#endif
write_nmv(bc, &mi->mv[0].as_mv, &best_mv,
(const nmv_context*) nmvc,
xd->allow_high_precision_mv);
if (mi->second_ref_frame) {
#if CONFIG_NEW_MVREF
unsigned int best_index;
MV_REFERENCE_FRAME sec_ref_frame = mi->second_ref_frame;
best_index =
pick_best_mv_ref(x, sec_ref_frame, mi->mv[1],
mi->ref_mvs[sec_ref_frame],
&best_second_mv);
// Encode the index of the choice.
vp9_write_mv_ref_id(bc,
xd->mb_mv_ref_id_probs[sec_ref_frame],
best_index);
cpi->best_ref_index_counts[sec_ref_frame][best_index]++;
#endif
write_nmv(bc, &mi->mv[1].as_mv, &best_second_mv,
(const nmv_context*) nmvc,
xd->allow_high_precision_mv);
}
break;
case SPLITMV: {
int j = 0;
#ifdef MODE_STATS
++count_mb_seg [mi->partitioning];
#endif
write_split(bc, mi->partitioning, cpi->common.fc.mbsplit_prob);
cpi->mbsplit_count[mi->partitioning]++;
do {
B_PREDICTION_MODE blockmode;
int_mv blockmv;
const int *const L =
vp9_mbsplits [mi->partitioning];
int k = -1; /* first block in subset j */
int mv_contz;
int_mv leftmv, abovemv;
blockmode = cpi->mb.partition_info->bmi[j].mode;
blockmv = cpi->mb.partition_info->bmi[j].mv;
#if CONFIG_DEBUG
while (j != L[++k])
if (k >= 16)
assert(0);
#else
while (j != L[++k]);
#endif
leftmv.as_int = left_block_mv(m, k);
abovemv.as_int = above_block_mv(m, k, mis);
mv_contz = vp9_mv_cont(&leftmv, &abovemv);
write_sub_mv_ref(bc, blockmode,
cpi->common.fc.sub_mv_ref_prob [mv_contz]);
cpi->sub_mv_ref_count[mv_contz][blockmode - LEFT4X4]++;
if (blockmode == NEW4X4) {
#ifdef ENTROPY_STATS
active_section = 11;
#endif
write_nmv(bc, &blockmv.as_mv, &best_mv,
(const nmv_context*) nmvc,
xd->allow_high_precision_mv);
if (mi->second_ref_frame) {
write_nmv(bc,
&cpi->mb.partition_info->bmi[j].second_mv.as_mv,
&best_second_mv,
(const nmv_context*) nmvc,
xd->allow_high_precision_mv);
}
}
} while (++j < cpi->mb.partition_info->count);
}
break;
default:
break;
}
}
// Update the mvcounts used to tune mv probs but only if this is
// the real pack run.
if ( !cpi->dummy_packing ) {
update_mvcount(cpi, x, &best_mv, &best_second_mv);
}
}
if (((rf == INTRA_FRAME && mode <= I8X8_PRED) ||
(rf != INTRA_FRAME && !(mode == SPLITMV &&
mi->partitioning == PARTITIONING_4X4))) &&
pc->txfm_mode == TX_MODE_SELECT &&
!((pc->mb_no_coeff_skip && skip_coeff) ||
(vp9_segfeature_active(xd, segment_id, SEG_LVL_EOB) &&
vp9_get_segdata(xd, segment_id, SEG_LVL_EOB) == 0))) {
TX_SIZE sz = mi->txfm_size;
// FIXME(rbultje) code ternary symbol once all experiments are merged
vp9_write(bc, sz != TX_4X4, pc->prob_tx[0]);
if (sz != TX_4X4 && mode != I8X8_PRED && mode != SPLITMV)
vp9_write(bc, sz != TX_8X8, pc->prob_tx[1]);
}
#ifdef ENTROPY_STATS
active_section = 1;
#endif
assert(tok < tok_end);
pack_mb_tokens(bc, &tok, tok_end);
#if CONFIG_SUPERBLOCKS
if (m->mbmi.encoded_as_sb) {
assert(!i);
mb_col += 2;
m += 2;
cpi->mb.partition_info += 2;
prev_m += 2;
break;
}
#endif
// Next MB
mb_row += dy;
mb_col += dx;
m += offset_extended;
prev_m += offset_extended;
cpi->mb.partition_info += offset_extended;
#if CONFIG_DEBUG
assert((prev_m - cpi->common.prev_mip) == (m - cpi->common.mip));
assert((prev_m - cpi->common.prev_mi) == (m - cpi->common.mi));
#endif
}
}
// Next SB
mb_row += 2;
m += mis + (1 - (pc->mb_cols & 0x1));
prev_m += mis + (1 - (pc->mb_cols & 0x1));
cpi->mb.partition_info += mis + (1 - (pc->mb_cols & 0x1));
}
}
static void write_mb_modes_kf(const VP9_COMMON *c,
const MACROBLOCKD *xd,
const MODE_INFO *m,
int mode_info_stride,
vp9_writer *const bc) {
int ym;
int segment_id;
ym = m->mbmi.mode;
segment_id = m->mbmi.segment_id;
if (xd->update_mb_segmentation_map) {
write_mb_segid(bc, &m->mbmi, xd);
}
if (c->mb_no_coeff_skip &&
(!vp9_segfeature_active(xd, segment_id, SEG_LVL_EOB) ||
(vp9_get_segdata(xd, segment_id, SEG_LVL_EOB) != 0))) {
int skip_coeff = m->mbmi.mb_skip_coeff;
#if CONFIG_SUPERBLOCKS
const int mis = mode_info_stride;
if (m->mbmi.encoded_as_sb) {
skip_coeff &= m[1].mbmi.mb_skip_coeff;
skip_coeff &= m[mis].mbmi.mb_skip_coeff;
skip_coeff &= m[mis + 1].mbmi.mb_skip_coeff;
}
#endif
vp9_write(bc, skip_coeff,
vp9_get_pred_prob(c, xd, PRED_MBSKIP));
}
#if CONFIG_SUPERBLOCKS
if (m->mbmi.encoded_as_sb) {
sb_kfwrite_ymode(bc, ym,
c->sb_kf_ymode_prob[c->kf_ymode_probs_index]);
} else
#endif
{
kfwrite_ymode(bc, ym,
c->kf_ymode_prob[c->kf_ymode_probs_index]);
}
if (ym == B_PRED) {
const int mis = c->mode_info_stride;
int i = 0;
#if CONFIG_COMP_INTRA_PRED
int uses_second =
m->bmi[0].as_mode.second !=
(B_PREDICTION_MODE)(B_DC_PRED - 1);
vp9_write(bc, uses_second, DEFAULT_COMP_INTRA_PROB);
#endif
do {
const B_PREDICTION_MODE A = above_block_mode(m, i, mis);
const B_PREDICTION_MODE L = left_block_mode(m, i);
const int bm = m->bmi[i].as_mode.first;
#if CONFIG_COMP_INTRA_PRED
const int bm2 = m->bmi[i].as_mode.second;
#endif
#ifdef ENTROPY_STATS
++intra_mode_stats [A] [L] [bm];
#endif
write_kf_bmode(bc, bm, c->kf_bmode_prob[A][L]);
#if 0 // CONFIG_NEWBINTRAMODES
if (!cpi->dummy_packing)
printf("%d: %d %d\n", i, bm, m->bmi[i].as_mode.context);
#endif
#if CONFIG_COMP_INTRA_PRED
if (uses_second) {
write_kf_bmode(bc, bm2, c->kf_bmode_prob[A][L]);
}
#endif
} while (++i < 16);
}
if (ym == I8X8_PRED) {
write_i8x8_mode(bc, m->bmi[0].as_mode.first,
c->fc.i8x8_mode_prob);
// printf(" mode: %d\n", m->bmi[0].as_mode.first); fflush(stdout);
write_i8x8_mode(bc, m->bmi[2].as_mode.first,
c->fc.i8x8_mode_prob);
// printf(" mode: %d\n", m->bmi[2].as_mode.first); fflush(stdout);
write_i8x8_mode(bc, m->bmi[8].as_mode.first,
c->fc.i8x8_mode_prob);
// printf(" mode: %d\n", m->bmi[8].as_mode.first); fflush(stdout);
write_i8x8_mode(bc, m->bmi[10].as_mode.first,
c->fc.i8x8_mode_prob);
// printf(" mode: %d\n", m->bmi[10].as_mode.first); fflush(stdout);
} else
write_uv_mode(bc, m->mbmi.uv_mode, c->kf_uv_mode_prob[ym]);
if (ym <= I8X8_PRED && c->txfm_mode == TX_MODE_SELECT &&
!((c->mb_no_coeff_skip && m->mbmi.mb_skip_coeff) ||
(vp9_segfeature_active(xd, segment_id, SEG_LVL_EOB) &&
vp9_get_segdata(xd, segment_id, SEG_LVL_EOB) == 0))) {
TX_SIZE sz = m->mbmi.txfm_size;
// FIXME(rbultje) code ternary symbol once all experiments are merged
vp9_write(bc, sz != TX_4X4, c->prob_tx[0]);
if (sz != TX_4X4 && ym <= TM_PRED)
vp9_write(bc, sz != TX_8X8, c->prob_tx[1]);
}
}
static void write_kfmodes(VP9_COMP* const cpi, vp9_writer* const bc) {
VP9_COMMON *const c = &cpi->common;
const int mis = c->mode_info_stride;
MACROBLOCKD *xd = &cpi->mb.e_mbd;
MODE_INFO *m;
int i;
int row, col;
int mb_row, mb_col;
int row_delta[4] = { 0, +1, 0, -1};
int col_delta[4] = { +1, -1, +1, +1};
TOKENEXTRA *tok = cpi->tok;
TOKENEXTRA *tok_end = tok + cpi->tok_count;
mb_row = 0;
for (row = 0; row < c->mb_rows; row += 2) {
m = c->mi + row * mis;
mb_col = 0;
for (col = 0; col < c->mb_cols; col += 2) {
#if CONFIG_SUPERBLOCKS
vp9_write(bc, m->mbmi.encoded_as_sb, c->sb_coded);
#endif
// Process the 4 MBs in the order:
// top-left, top-right, bottom-left, bottom-right
for (i = 0; i < 4; i++) {
int dy = row_delta[i];
int dx = col_delta[i];
int offset_extended = dy * mis + dx;
if ((mb_row >= c->mb_rows) || (mb_col >= c->mb_cols)) {
// MB lies outside frame, move on
mb_row += dy;
mb_col += dx;
m += offset_extended;
continue;
}
// Make sure the MacroBlockD mode info pointer is set correctly
xd->mode_info_context = m;
write_mb_modes_kf(c, xd, m, mis, bc);
#ifdef ENTROPY_STATS
active_section = 8;
#endif
assert(tok < tok_end);
pack_mb_tokens(bc, &tok, tok_end);
#if CONFIG_SUPERBLOCKS
if (m->mbmi.encoded_as_sb) {
assert(!i);
mb_col += 2;
m += 2;
break;
}
#endif
// Next MB
mb_row += dy;
mb_col += dx;
m += offset_extended;
}
}
mb_row += 2;
}
}
/* This function is used for debugging probability trees. */
static void print_prob_tree(vp9_prob
coef_probs[BLOCK_TYPES][COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES]) {
/* print coef probability tree */
int i, j, k, l;
FILE *f = fopen("enc_tree_probs.txt", "a");
fprintf(f, "{\n");
for (i = 0; i < BLOCK_TYPES; i++) {
fprintf(f, " {\n");
for (j = 0; j < COEF_BANDS; j++) {
fprintf(f, " {\n");
for (k = 0; k < PREV_COEF_CONTEXTS; k++) {
fprintf(f, " {");
for (l = 0; l < ENTROPY_NODES; l++) {
fprintf(f, "%3u, ",
(unsigned int)(coef_probs [i][j][k][l]));
}
fprintf(f, " }\n");
}
fprintf(f, " }\n");
}
fprintf(f, " }\n");
}
fprintf(f, "}\n");
fclose(f);
}
static void build_coeff_contexts(VP9_COMP *cpi) {
int i = 0, j, k;
#ifdef ENTROPY_STATS
int t = 0;
#endif
for (i = 0; i < BLOCK_TYPES; ++i) {
for (j = 0; j < COEF_BANDS; ++j) {
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
cpi->frame_coef_probs [i][j][k],
cpi->frame_branch_ct [i][j][k],
cpi->coef_counts [i][j][k],
256, 1
);
#ifdef ENTROPY_STATS
if (!cpi->dummy_packing)
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
context_counters[i][j][k][t] += cpi->coef_counts[i][j][k][t];
#endif
}
}
}
for (i = 0; i < BLOCK_TYPES; ++i) {
for (j = 0; j < COEF_BANDS; ++j) {
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
cpi->frame_hybrid_coef_probs [i][j][k],
cpi->frame_hybrid_branch_ct [i][j][k],
cpi->hybrid_coef_counts [i][j][k],
256, 1
);
#ifdef ENTROPY_STATS
if (!cpi->dummy_packing)
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
hybrid_context_counters[i][j][k][t] += cpi->hybrid_coef_counts[i][j][k][t];
#endif
}
}
}
if (cpi->common.txfm_mode != ONLY_4X4) {
for (i = 0; i < BLOCK_TYPES_8X8; ++i) {
for (j = 0; j < COEF_BANDS; ++j) {
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
/* at every context */
/* calc probs and branch cts for this frame only */
// vp9_prob new_p [ENTROPY_NODES];
// unsigned int branch_ct [ENTROPY_NODES] [2];
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
cpi->frame_coef_probs_8x8 [i][j][k],
cpi->frame_branch_ct_8x8 [i][j][k],
cpi->coef_counts_8x8 [i][j][k],
256, 1
);
#ifdef ENTROPY_STATS
if (!cpi->dummy_packing)
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
context_counters_8x8[i][j][k][t] += cpi->coef_counts_8x8[i][j][k][t];
#endif
}
}
}
for (i = 0; i < BLOCK_TYPES_8X8; ++i) {
for (j = 0; j < COEF_BANDS; ++j) {
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
/* at every context */
/* calc probs and branch cts for this frame only */
// vp9_prob new_p [ENTROPY_NODES];
// unsigned int branch_ct [ENTROPY_NODES] [2];
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
cpi->frame_hybrid_coef_probs_8x8 [i][j][k],
cpi->frame_hybrid_branch_ct_8x8 [i][j][k],
cpi->hybrid_coef_counts_8x8 [i][j][k],
256, 1
);
#ifdef ENTROPY_STATS
if (!cpi->dummy_packing)
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
hybrid_context_counters_8x8[i][j][k][t] += cpi->hybrid_coef_counts_8x8[i][j][k][t];
#endif
}
}
}
}
if (cpi->common.txfm_mode > ALLOW_8X8) {
for (i = 0; i < BLOCK_TYPES_16X16; ++i) {
for (j = 0; j < COEF_BANDS; ++j) {
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
cpi->frame_coef_probs_16x16[i][j][k],
cpi->frame_branch_ct_16x16[i][j][k],
cpi->coef_counts_16x16[i][j][k], 256, 1);
#ifdef ENTROPY_STATS
if (!cpi->dummy_packing)
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
context_counters_16x16[i][j][k][t] += cpi->coef_counts_16x16[i][j][k][t];
#endif
}
}
}
}
for (i = 0; i < BLOCK_TYPES_16X16; ++i) {
for (j = 0; j < COEF_BANDS; ++j) {
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
vp9_tree_probs_from_distribution(
MAX_ENTROPY_TOKENS, vp9_coef_encodings, vp9_coef_tree,
cpi->frame_hybrid_coef_probs_16x16[i][j][k],
cpi->frame_hybrid_branch_ct_16x16[i][j][k],
cpi->hybrid_coef_counts_16x16[i][j][k], 256, 1);
#ifdef ENTROPY_STATS
if (!cpi->dummy_packing)
for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
hybrid_context_counters_16x16[i][j][k][t] += cpi->hybrid_coef_counts_16x16[i][j][k][t];
#endif
}
}
}
}
static void update_coef_probs_common(
vp9_writer* const bc,
vp9_prob new_frame_coef_probs[BLOCK_TYPES][COEF_BANDS]
[PREV_COEF_CONTEXTS][ENTROPY_NODES],
vp9_prob old_frame_coef_probs[BLOCK_TYPES][COEF_BANDS]
[PREV_COEF_CONTEXTS][ENTROPY_NODES],
unsigned int frame_branch_ct[BLOCK_TYPES][COEF_BANDS]
[PREV_COEF_CONTEXTS][ENTROPY_NODES][2]) {
int i, j, k, t;
int update[2] = {0, 0};
int savings;
// vp9_prob bestupd = find_coef_update_prob(cpi);
/* dry run to see if there is any udpate at all needed */
savings = 0;
for (i = 0; i < BLOCK_TYPES; ++i) {
for (j = !i; j < COEF_BANDS; ++j) {
int prev_coef_savings[ENTROPY_NODES] = {0};
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
for (t = 0; t < ENTROPY_NODES; ++t) {
vp9_prob newp = new_frame_coef_probs[i][j][k][t];
const vp9_prob oldp = old_frame_coef_probs[i][j][k][t];
const vp9_prob upd = COEF_UPDATE_PROB;
int s = prev_coef_savings[t];
int u = 0;
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
#if defined(SEARCH_NEWP)
s = prob_diff_update_savings_search(
frame_branch_ct[i][j][k][t],
oldp, &newp, upd);
if (s > 0 && newp != oldp)
u = 1;
if (u)
savings += s - (int)(vp9_cost_zero(upd));
else
savings -= (int)(vp9_cost_zero(upd));
#else
s = prob_update_savings(
frame_branch_ct[i][j][k][t],
oldp, newp, upd);
if (s > 0)
u = 1;
if (u)
savings += s;
#endif
update[u]++;
}
}
}
}
// printf("Update %d %d, savings %d\n", update[0], update[1], savings);
/* Is coef updated at all */
if (update[1] == 0 || savings < 0) {
vp9_write_bit(bc, 0);
} else {
vp9_write_bit(bc, 1);
for (i = 0; i < BLOCK_TYPES; ++i) {
for (j = !i; j < COEF_BANDS; ++j) {
int prev_coef_savings[ENTROPY_NODES] = {0};
for (k = 0; k < PREV_COEF_CONTEXTS; ++k) {
// calc probs and branch cts for this frame only
for (t = 0; t < ENTROPY_NODES; ++t) {
vp9_prob newp = new_frame_coef_probs[i][j][k][t];
vp9_prob *oldp = old_frame_coef_probs[i][j][k] + t;
const vp9_prob upd = COEF_UPDATE_PROB;
int s = prev_coef_savings[t];
int u = 0;
if (k >= 3 && ((i == 0 && j == 1) || (i > 0 && j == 0)))
continue;
#if defined(SEARCH_NEWP)
s = prob_diff_update_savings_search(
frame_branch_ct[i][j][k][t],
*oldp, &newp, upd);
if (s > 0 && newp != *oldp)
u = 1;
#else
s = prob_update_savings(
frame_branch_ct[i][j][k][t],
*oldp, newp, upd);
if (s > 0)
u = 1;
#endif
vp9_write(bc, u, upd);
#ifdef ENTROPY_STATS
if (!cpi->dummy_packing)
++ tree_update_hist [i][j][k][t] [u];
#endif
if (u) {
/* send/use new probability */
write_prob_diff_update(bc, newp, *oldp);
*oldp = newp;
}
}
}
}
}
}
}
static void update_coef_probs(VP9_COMP* const cpi, vp9_writer* const bc) {
vp9_clear_system_state();
// Build the cofficient contexts based on counts collected in encode loop
build_coeff_contexts(cpi);
update_coef_probs_common(bc,
cpi->frame_coef_probs,
cpi->common.fc.coef_probs,
cpi->frame_branch_ct);
update_coef_probs_common(bc,
cpi->frame_hybrid_coef_probs,
cpi->common.fc.hybrid_coef_probs,
cpi->frame_hybrid_branch_ct);
/* do not do this if not even allowed */
if (cpi->common.txfm_mode != ONLY_4X4) {
update_coef_probs_common(bc,
cpi->frame_coef_probs_8x8,
cpi->common.fc.coef_probs_8x8,
cpi->frame_branch_ct_8x8);
update_coef_probs_common(bc,
cpi->frame_hybrid_coef_probs_8x8,
cpi->common.fc.hybrid_coef_probs_8x8,
cpi->frame_hybrid_branch_ct_8x8);
}
if (cpi->common.txfm_mode > ALLOW_8X8) {
update_coef_probs_common(bc,
cpi->frame_coef_probs_16x16,
cpi->common.fc.coef_probs_16x16,
cpi->frame_branch_ct_16x16);
update_coef_probs_common(bc,
cpi->frame_hybrid_coef_probs_16x16,
cpi->common.fc.hybrid_coef_probs_16x16,
cpi->frame_hybrid_branch_ct_16x16);
}
}
#ifdef PACKET_TESTING
FILE *vpxlogc = 0;
#endif
static void put_delta_q(vp9_writer *bc, int delta_q) {
if (delta_q != 0) {
vp9_write_bit(bc, 1);
vp9_write_literal(bc, abs(delta_q), 4);
if (delta_q < 0)
vp9_write_bit(bc, 1);
else
vp9_write_bit(bc, 0);
} else
vp9_write_bit(bc, 0);
}
static void decide_kf_ymode_entropy(VP9_COMP *cpi) {
int mode_cost[MB_MODE_COUNT];
int cost;
int bestcost = INT_MAX;
int bestindex = 0;
int i, j;
for (i = 0; i < 8; i++) {
vp9_cost_tokens(mode_cost, cpi->common.kf_ymode_prob[i], vp9_kf_ymode_tree);
cost = 0;
for (j = 0; j < VP9_YMODES; j++) {
cost += mode_cost[j] * cpi->ymode_count[j];
}
#if CONFIG_SUPERBLOCKS
vp9_cost_tokens(mode_cost, cpi->common.sb_kf_ymode_prob[i],
vp9_sb_ymode_tree);
for (j = 0; j < VP9_I32X32_MODES; j++) {
cost += mode_cost[j] * cpi->sb_ymode_count[j];
}
#endif
if (cost < bestcost) {
bestindex = i;
bestcost = cost;
}
}
cpi->common.kf_ymode_probs_index = bestindex;
}
static void segment_reference_frames(VP9_COMP *cpi) {
VP9_COMMON *oci = &cpi->common;
MODE_INFO *mi = oci->mi;
int ref[MAX_MB_SEGMENTS] = {0};
int i, j;
int mb_index = 0;
MACROBLOCKD *const xd = &cpi->mb.e_mbd;
for (i = 0; i < oci->mb_rows; i++) {
for (j = 0; j < oci->mb_cols; j++, mb_index++) {
ref[mi[mb_index].mbmi.segment_id] |= (1 << mi[mb_index].mbmi.ref_frame);
}
mb_index++;
}
for (i = 0; i < MAX_MB_SEGMENTS; i++) {
vp9_enable_segfeature(xd, i, SEG_LVL_REF_FRAME);
vp9_set_segdata(xd, i, SEG_LVL_REF_FRAME, ref[i]);
}
}
void vp9_pack_bitstream(VP9_COMP *cpi, unsigned char *dest,
unsigned long *size) {
int i, j;
VP9_HEADER oh;
VP9_COMMON *const pc = &cpi->common;
vp9_writer header_bc, residual_bc;
MACROBLOCKD *const xd = &cpi->mb.e_mbd;
int extra_bytes_packed = 0;
unsigned char *cx_data = dest;
oh.show_frame = (int) pc->show_frame;
oh.type = (int)pc->frame_type;
oh.version = pc->version;
oh.first_partition_length_in_bytes = 0;
cx_data += 3;
#if defined(SECTIONBITS_OUTPUT)
Sectionbits[active_section = 1] += sizeof(VP9_HEADER) * 8 * 256;
#endif
compute_update_table();
/* vp9_kf_default_bmode_probs() is called in vp9_setup_key_frame() once
* for each K frame before encode frame. pc->kf_bmode_prob doesn't get
* changed anywhere else. No need to call it again here. --yw
* vp9_kf_default_bmode_probs( pc->kf_bmode_prob);
*/
/* every keyframe send startcode, width, height, scale factor, clamp
* and color type.
*/
if (oh.type == KEY_FRAME) {
int v;
// Start / synch code
cx_data[0] = 0x9D;
cx_data[1] = 0x01;
cx_data[2] = 0x2a;
v = (pc->horiz_scale << 14) | pc->Width;
cx_data[3] = v;
cx_data[4] = v >> 8;
v = (pc->vert_scale << 14) | pc->Height;
cx_data[5] = v;
cx_data[6] = v >> 8;
extra_bytes_packed = 7;
cx_data += extra_bytes_packed;
vp9_start_encode(&header_bc, cx_data);
// signal clr type
vp9_write_bit(&header_bc, pc->clr_type);
vp9_write_bit(&header_bc, pc->clamp_type);
} else {
vp9_start_encode(&header_bc, cx_data);
}
// Signal whether or not Segmentation is enabled
vp9_write_bit(&header_bc, (xd->segmentation_enabled) ? 1 : 0);
// Indicate which features are enabled
if (xd->segmentation_enabled) {
// Indicate whether or not the segmentation map is being updated.
vp9_write_bit(&header_bc, (xd->update_mb_segmentation_map) ? 1 : 0);
// If it is, then indicate the method that will be used.
if (xd->update_mb_segmentation_map) {
// Select the coding strategy (temporal or spatial)
vp9_choose_segmap_coding_method(cpi);
// Send the tree probabilities used to decode unpredicted
// macro-block segments
for (i = 0; i < MB_FEATURE_TREE_PROBS; i++) {
int data = xd->mb_segment_tree_probs[i];
if (data != 255) {
vp9_write_bit(&header_bc, 1);
vp9_write_literal(&header_bc, data, 8);
} else {
vp9_write_bit(&header_bc, 0);
}
}
// Write out the chosen coding method.
vp9_write_bit(&header_bc, (pc->temporal_update) ? 1 : 0);
if (pc->temporal_update) {
for (i = 0; i < PREDICTION_PROBS; i++) {
int data = pc->segment_pred_probs[i];
if (data != 255) {
vp9_write_bit(&header_bc, 1);
vp9_write_literal(&header_bc, data, 8);
} else {
vp9_write_bit(&header_bc, 0);
}
}
}
}
vp9_write_bit(&header_bc, (xd->update_mb_segmentation_data) ? 1 : 0);
// segment_reference_frames(cpi);
if (xd->update_mb_segmentation_data) {
signed char Data;
vp9_write_bit(&header_bc, (xd->mb_segment_abs_delta) ? 1 : 0);
// For each segments id...
for (i = 0; i < MAX_MB_SEGMENTS; i++) {
// For each segmentation codable feature...
for (j = 0; j < SEG_LVL_MAX; j++) {
Data = vp9_get_segdata(xd, i, j);
// If the feature is enabled...
if (vp9_segfeature_active(xd, i, j)) {
vp9_write_bit(&header_bc, 1);
// Is the segment data signed..
if (vp9_is_segfeature_signed(j)) {
// Encode the relevant feature data
if (Data < 0) {
Data = - Data;
vp9_write_literal(&header_bc, Data,
vp9_seg_feature_data_bits(j));
vp9_write_bit(&header_bc, 1);
} else {
vp9_write_literal(&header_bc, Data,
vp9_seg_feature_data_bits(j));
vp9_write_bit(&header_bc, 0);
}
}
// Unsigned data element so no sign bit needed
else
vp9_write_literal(&header_bc, Data,
vp9_seg_feature_data_bits(j));
} else
vp9_write_bit(&header_bc, 0);
}
}
}
}
// Encode the common prediction model status flag probability updates for
// the reference frame
update_refpred_stats(cpi);
if (pc->frame_type != KEY_FRAME) {
for (i = 0; i < PREDICTION_PROBS; i++) {
if (cpi->ref_pred_probs_update[i]) {
vp9_write_bit(&header_bc, 1);
vp9_write_literal(&header_bc, pc->ref_pred_probs[i], 8);
} else {
vp9_write_bit(&header_bc, 0);
}
}
}
#if CONFIG_SUPERBLOCKS
{
/* sb mode probability */
const int sb_max = (((pc->mb_rows + 1) >> 1) * ((pc->mb_cols + 1) >> 1));
pc->sb_coded = get_prob(sb_max - cpi->sb_count, sb_max);
vp9_write_literal(&header_bc, pc->sb_coded, 8);
}
#endif
{
if (pc->txfm_mode == TX_MODE_SELECT) {
pc->prob_tx[0] = get_prob(cpi->txfm_count[0] + cpi->txfm_count_8x8p[0],
cpi->txfm_count[0] + cpi->txfm_count[1] + cpi->txfm_count[2] +
cpi->txfm_count_8x8p[0] + cpi->txfm_count_8x8p[1]);
pc->prob_tx[1] = get_prob(cpi->txfm_count[1], cpi->txfm_count[1] + cpi->txfm_count[2]);
} else {
pc->prob_tx[0] = 128;
pc->prob_tx[1] = 128;
}
vp9_write_literal(&header_bc, pc->txfm_mode, 2);
if (pc->txfm_mode == TX_MODE_SELECT) {
vp9_write_literal(&header_bc, pc->prob_tx[0], 8);
vp9_write_literal(&header_bc, pc->prob_tx[1], 8);
}
}
// Encode the loop filter level and type
vp9_write_bit(&header_bc, pc->filter_type);
vp9_write_literal(&header_bc, pc->filter_level, 6);
vp9_write_literal(&header_bc, pc->sharpness_level, 3);
// Write out loop filter deltas applied at the MB level based on mode or ref frame (if they are enabled).
vp9_write_bit(&header_bc, (xd->mode_ref_lf_delta_enabled) ? 1 : 0);
if (xd->mode_ref_lf_delta_enabled) {
// Do the deltas need to be updated
int send_update = xd->mode_ref_lf_delta_update;
vp9_write_bit(&header_bc, send_update);
if (send_update) {
int Data;
// Send update
for (i = 0; i < MAX_REF_LF_DELTAS; i++) {
Data = xd->ref_lf_deltas[i];
// Frame level data
if (xd->ref_lf_deltas[i] != xd->last_ref_lf_deltas[i]) {
xd->last_ref_lf_deltas[i] = xd->ref_lf_deltas[i];
vp9_write_bit(&header_bc, 1);
if (Data > 0) {
vp9_write_literal(&header_bc, (Data & 0x3F), 6);
vp9_write_bit(&header_bc, 0); // sign
} else {
Data = -Data;
vp9_write_literal(&header_bc, (Data & 0x3F), 6);
vp9_write_bit(&header_bc, 1); // sign
}
} else {
vp9_write_bit(&header_bc, 0);
}
}
// Send update
for (i = 0; i < MAX_MODE_LF_DELTAS; i++) {
Data = xd->mode_lf_deltas[i];
if (xd->mode_lf_deltas[i] != xd->last_mode_lf_deltas[i]) {
xd->last_mode_lf_deltas[i] = xd->mode_lf_deltas[i];
vp9_write_bit(&header_bc, 1);
if (Data > 0) {
vp9_write_literal(&header_bc, (Data & 0x3F), 6);
vp9_write_bit(&header_bc, 0); // sign
} else {
Data = -Data;
vp9_write_literal(&header_bc, (Data & 0x3F), 6);
vp9_write_bit(&header_bc, 1); // sign
}
} else {
vp9_write_bit(&header_bc, 0);
}
}
}
}
// signal here is multi token partition is enabled
// vp9_write_literal(&header_bc, pc->multi_token_partition, 2);
vp9_write_literal(&header_bc, 0, 2);
// Frame Q baseline quantizer index
vp9_write_literal(&header_bc, pc->base_qindex, QINDEX_BITS);
// Transmit Dc, Second order and Uv quantizer delta information
put_delta_q(&header_bc, pc->y1dc_delta_q);
put_delta_q(&header_bc, pc->y2dc_delta_q);
put_delta_q(&header_bc, pc->y2ac_delta_q);
put_delta_q(&header_bc, pc->uvdc_delta_q);
put_delta_q(&header_bc, pc->uvac_delta_q);
// When there is a key frame all reference buffers are updated using the new key frame
if (pc->frame_type != KEY_FRAME) {
// Should the GF or ARF be updated using the transmitted frame or buffer
vp9_write_bit(&header_bc, pc->refresh_golden_frame);
vp9_write_bit(&header_bc, pc->refresh_alt_ref_frame);
// For inter frames the current default behavior is that when
// cm->refresh_golden_frame is set we copy the old GF over to
// the ARF buffer. This is purely an encoder decision at present.
if (pc->refresh_golden_frame)
pc->copy_buffer_to_arf = 2;
// If not being updated from current frame should either GF or ARF be updated from another buffer
if (!pc->refresh_golden_frame)
vp9_write_literal(&header_bc, pc->copy_buffer_to_gf, 2);
if (!pc->refresh_alt_ref_frame)
vp9_write_literal(&header_bc, pc->copy_buffer_to_arf, 2);
// Indicate reference frame sign bias for Golden and ARF frames (always 0 for last frame buffer)
vp9_write_bit(&header_bc, pc->ref_frame_sign_bias[GOLDEN_FRAME]);
vp9_write_bit(&header_bc, pc->ref_frame_sign_bias[ALTREF_FRAME]);
// Signal whether to allow high MV precision
vp9_write_bit(&header_bc, (xd->allow_high_precision_mv) ? 1 : 0);
if (pc->mcomp_filter_type == SWITCHABLE) {
/* Check to see if only one of the filters is actually used */
int count[VP9_SWITCHABLE_FILTERS];
int i, j, c = 0;
for (i = 0; i < VP9_SWITCHABLE_FILTERS; ++i) {
count[i] = 0;
for (j = 0; j <= VP9_SWITCHABLE_FILTERS; ++j) {
count[i] += cpi->switchable_interp_count[j][i];
}
c += (count[i] > 0);
}
if (c == 1) {
/* Only one filter is used. So set the filter at frame level */
for (i = 0; i < VP9_SWITCHABLE_FILTERS; ++i) {
if (count[i]) {
pc->mcomp_filter_type = vp9_switchable_interp[i];
break;
}
}
}
}
// Signal the type of subpel filter to use
vp9_write_bit(&header_bc, (pc->mcomp_filter_type == SWITCHABLE));
if (pc->mcomp_filter_type != SWITCHABLE)
vp9_write_literal(&header_bc, (pc->mcomp_filter_type), 2);
}
vp9_write_bit(&header_bc, pc->refresh_entropy_probs);
if (pc->frame_type != KEY_FRAME)
vp9_write_bit(&header_bc, pc->refresh_last_frame);
#ifdef ENTROPY_STATS
if (pc->frame_type == INTER_FRAME)
active_section = 0;
else
active_section = 7;
#endif
vp9_clear_system_state(); // __asm emms;
vp9_copy(cpi->common.fc.pre_coef_probs, cpi->common.fc.coef_probs);
vp9_copy(cpi->common.fc.pre_hybrid_coef_probs, cpi->common.fc.hybrid_coef_probs);
vp9_copy(cpi->common.fc.pre_coef_probs_8x8, cpi->common.fc.coef_probs_8x8);
vp9_copy(cpi->common.fc.pre_hybrid_coef_probs_8x8, cpi->common.fc.hybrid_coef_probs_8x8);
vp9_copy(cpi->common.fc.pre_coef_probs_16x16, cpi->common.fc.coef_probs_16x16);
vp9_copy(cpi->common.fc.pre_hybrid_coef_probs_16x16, cpi->common.fc.hybrid_coef_probs_16x16);
vp9_copy(cpi->common.fc.pre_ymode_prob, cpi->common.fc.ymode_prob);
vp9_copy(cpi->common.fc.pre_uv_mode_prob, cpi->common.fc.uv_mode_prob);
vp9_copy(cpi->common.fc.pre_bmode_prob, cpi->common.fc.bmode_prob);
vp9_copy(cpi->common.fc.pre_sub_mv_ref_prob, cpi->common.fc.sub_mv_ref_prob);
vp9_copy(cpi->common.fc.pre_mbsplit_prob, cpi->common.fc.mbsplit_prob);
vp9_copy(cpi->common.fc.pre_i8x8_mode_prob, cpi->common.fc.i8x8_mode_prob);
cpi->common.fc.pre_nmvc = cpi->common.fc.nmvc;
vp9_zero(cpi->sub_mv_ref_count);
vp9_zero(cpi->mbsplit_count);
vp9_zero(cpi->common.fc.mv_ref_ct)
vp9_zero(cpi->common.fc.mv_ref_ct_a)
update_coef_probs(cpi, &header_bc);
#ifdef ENTROPY_STATS
active_section = 2;
#endif
// Write out the mb_no_coeff_skip flag
vp9_write_bit(&header_bc, pc->mb_no_coeff_skip);
if (pc->mb_no_coeff_skip) {
int k;
vp9_update_skip_probs(cpi);
for (k = 0; k < MBSKIP_CONTEXTS; ++k)
vp9_write_literal(&header_bc, pc->mbskip_pred_probs[k], 8);
}
if (pc->frame_type == KEY_FRAME) {
if (!pc->kf_ymode_probs_update) {
vp9_write_literal(&header_bc, pc->kf_ymode_probs_index, 3);
}
} else {
// Update the probabilities used to encode reference frame data
update_ref_probs(cpi);
#ifdef ENTROPY_STATS
active_section = 1;
#endif
#if CONFIG_PRED_FILTER
// Write the prediction filter mode used for this frame
vp9_write_literal(&header_bc, pc->pred_filter_mode, 2);
// Write prediction filter on/off probability if signaling at MB level
if (pc->pred_filter_mode == 2)
vp9_write_literal(&header_bc, pc->prob_pred_filter_off, 8);
#endif
if (pc->mcomp_filter_type == SWITCHABLE)
update_switchable_interp_probs(cpi, &header_bc);
vp9_write_literal(&header_bc, pc->prob_intra_coded, 8);
vp9_write_literal(&header_bc, pc->prob_last_coded, 8);
vp9_write_literal(&header_bc, pc->prob_gf_coded, 8);
{
const int comp_pred_mode = cpi->common.comp_pred_mode;
const int use_compound_pred = (comp_pred_mode != SINGLE_PREDICTION_ONLY);
const int use_hybrid_pred = (comp_pred_mode == HYBRID_PREDICTION);
vp9_write(&header_bc, use_compound_pred, 128);
if (use_compound_pred) {
vp9_write(&header_bc, use_hybrid_pred, 128);
if (use_hybrid_pred) {
for (i = 0; i < COMP_PRED_CONTEXTS; i++) {
pc->prob_comppred[i] = get_binary_prob(cpi->single_pred_count[i],
cpi->comp_pred_count[i]);
vp9_write_literal(&header_bc, pc->prob_comppred[i], 8);
}
}
}
}
update_mbintra_mode_probs(cpi, &header_bc);
#if CONFIG_NEW_MVREF
// Temp defaults probabilities for ecnoding the MV ref id signal
vpx_memset(xd->mb_mv_ref_id_probs, 192, sizeof(xd->mb_mv_ref_id_probs));
#endif
vp9_write_nmvprobs(cpi, xd->allow_high_precision_mv, &header_bc);
}
vp9_stop_encode(&header_bc);
oh.first_partition_length_in_bytes = header_bc.pos;
/* update frame tag */
{
int v = (oh.first_partition_length_in_bytes << 5) |
(oh.show_frame << 4) |
(oh.version << 1) |
oh.type;
dest[0] = v;
dest[1] = v >> 8;
dest[2] = v >> 16;
}
*size = VP9_HEADER_SIZE + extra_bytes_packed + header_bc.pos;
vp9_start_encode(&residual_bc, cx_data + header_bc.pos);
if (pc->frame_type == KEY_FRAME) {
decide_kf_ymode_entropy(cpi);
write_kfmodes(cpi, &residual_bc);
} else {
pack_inter_mode_mvs(cpi, &residual_bc);
vp9_update_mode_context(&cpi->common);
}
vp9_stop_encode(&residual_bc);
*size += residual_bc.pos;
}
#ifdef ENTROPY_STATS
void print_tree_update_probs() {
int i, j, k, l;
FILE *f = fopen("coefupdprob.h", "w");
int Sum;
fprintf(f, "\n/* Update probabilities for token entropy tree. */\n\n");
fprintf(f, "const vp9_prob\n"
"vp9_coef_update_probs[BLOCK_TYPES]\n"
" [COEF_BANDS]\n"
" [PREV_COEF_CONTEXTS]\n"
" [ENTROPY_NODES] = {\n");
for (i = 0; i < BLOCK_TYPES; i++) {
fprintf(f, " { \n");
for (j = 0; j < COEF_BANDS; j++) {
fprintf(f, " {\n");
for (k = 0; k < PREV_COEF_CONTEXTS; k++) {
fprintf(f, " {");
for (l = 0; l < ENTROPY_NODES; l++) {
fprintf(f, "%3ld, ",
get_binary_prob(tree_update_hist[i][j][k][l][0],
tree_update_hist[i][j][k][l][1]));
}
fprintf(f, "},\n");
}
fprintf(f, " },\n");
}
fprintf(f, " },\n");
}
fprintf(f, "};\n");
fprintf(f, "const vp9_prob\n"
"vp9_coef_update_probs_8x8[BLOCK_TYPES_8X8]\n"
" [COEF_BANDS]\n"
" [PREV_COEF_CONTEXTS]\n"
" [ENTROPY_NODES] = {\n");
for (i = 0; i < BLOCK_TYPES_8X8; i++) {
fprintf(f, " { \n");
for (j = 0; j < COEF_BANDS; j++) {
fprintf(f, " {\n");
for (k = 0; k < PREV_COEF_CONTEXTS; k++) {
fprintf(f, " {");
for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++) {
fprintf(f, "%3ld, ",
get_binary_prob(tree_update_hist_8x8[i][j][k][l][0],
tree_update_hist_8x8[i][j][k][l][1]));
}
fprintf(f, "},\n");
}
fprintf(f, " },\n");
}
fprintf(f, " },\n");
}
fprintf(f, "const vp9_prob\n"
"vp9_coef_update_probs_16x16[BLOCK_TYPES_16X16]\n"
" [COEF_BANDS]\n"
" [PREV_COEF_CONTEXTS]\n"
" [ENTROPY_NODES] = {\n");
for (i = 0; i < BLOCK_TYPES_16X16; i++) {
fprintf(f, " { \n");
for (j = 0; j < COEF_BANDS; j++) {
fprintf(f, " {\n");
for (k = 0; k < PREV_COEF_CONTEXTS; k++) {
fprintf(f, " {");
for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++) {
fprintf(f, "%3ld, ",
get_binary_prob(tree_update_hist_16x16[i][j][k][l][0],
tree_update_hist_16x16[i][j][k][l][1]));
}
fprintf(f, "},\n");
}
fprintf(f, " },\n");
}
fprintf(f, " },\n");
}
fclose(f);
f = fopen("treeupdate.bin", "wb");
fwrite(tree_update_hist, sizeof(tree_update_hist), 1, f);
fwrite(tree_update_hist_8x8, sizeof(tree_update_hist_8x8), 1, f);
fwrite(tree_update_hist_16x16, sizeof(tree_update_hist_16x16), 1, f);
fclose(f);
}
#endif
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