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John Koleszar authored
Changes 'The VP8 project' to 'The WebM project', for consistency with other webmproject.org repositories. Fixes issue #97. Change-Id: I37c13ed5fbdb9d334ceef71c6350e9febed9bbba
c2140b8a
bitstream.c 89.74 KiB
/* * 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 "vp8/common/header.h"#include "encodemv.h"#include "vp8/common/entropymode.h"#include "vp8/common/findnearmv.h"#include "mcomp.h"#include "vp8/common/systemdependent.h"#include <assert.h>#include <stdio.h>#include <limits.h>#include "vp8/common/pragmas.h"#include "vpx/vpx_encoder.h"#include "vpx_mem/vpx_mem.h"#include "bitstream.h"#include "segmentation.h"#include "vp8/common/seg_common.h"#include "vp8/common/pred_common.h"#include "vp8/common/entropy.h"#include "vp8/encoder/encodemv.h"#if CONFIG_NEWBESTREFMV#include "vp8/common/mvref_common.h"#endif#if defined(SECTIONBITS_OUTPUT)unsigned __int64 Sectionbits[500];#endif//int final_packing = 0;#ifdef ENTROPY_STATSint intra_mode_stats [VP8_BINTRAMODES] [VP8_BINTRAMODES] [VP8_BINTRAMODES];unsigned int tree_update_hist [BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES][2];#if CONFIG_HYBRIDTRANSFORMunsigned int hybrid_tree_update_hist [BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES][2];#endifunsigned int tree_update_hist_8x8 [BLOCK_TYPES_8X8] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES] [2];#if CONFIG_HYBRIDTRANSFORM8X8unsigned int hybrid_tree_update_hist_8x8 [BLOCK_TYPES_8X8] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES] [2];#endif#if CONFIG_TX16X16unsigned int tree_update_hist_16x16 [BLOCK_TYPES_16X16] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES] [2];#if CONFIG_HYBRIDTRANSFORM16X16unsigned int hybrid_tree_update_hist_16x16 [BLOCK_TYPES_16X16]7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
[COEF_BANDS]
[PREV_COEF_CONTEXTS]
[ENTROPY_NODES] [2];
#endif
#endif
extern unsigned int active_section;
#endif
#ifdef MODE_STATS
int count_mb_seg[4] = { 0, 0, 0, 0 };
#endif
#define vp8_cost_upd ((int)(vp8_cost_one(upd) - vp8_cost_zero(upd)) >> 8)
#define vp8_cost_upd256 ((int)(vp8_cost_one(upd) - vp8_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] = vp8_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 = recenter_nonneg(v, m) - 1;
else
i = recenter_nonneg(n - 1 - v, n - 1 - m) - 1;
i = split_index(i, n - 1, modulus);
return i;
}
static void write_prob_diff_update(vp8_writer *const w,
vp8_prob newp, vp8_prob oldp) {
int delp = remap_prob(newp, oldp);
vp8_encode_term_subexp(w, delp, SUBEXP_PARAM, 255);
}
static int prob_diff_update_cost(vp8_prob newp, vp8_prob oldp) {
int delp = remap_prob(newp, oldp);
return update_bits[delp] * 256;
}
#if CONFIG_NEW_MVREF
// Estimate the cost of each coding the vector using each reference candidate
unsigned int pick_best_mv_ref( MACROBLOCK *x,
int_mv target_mv,
int_mv * mv_ref_list,
int_mv * best_ref ) {
int i;
int best_index = 0;
int cost, cost2;
int index_cost[MAX_MV_REFS];
MACROBLOCKD *xd = &x->e_mbd;
/*unsigned int distance, distance2;
141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210
distance = mv_distance(&target_mv, &mv_ref_list[0]);
for (i = 1; i < MAX_MV_REFS; ++i ) {
distance2 =
mv_distance(&target_mv, &mv_ref_list[i]);
if (distance2 < distance) {
distance = distance2;
best_index = i;
}
}*/
// For now estimate the cost of selecting a given ref index
// as index * 1 bits (but here 1 bit is scaled to 256)
for (i = 0; i < MAX_MV_REFS; ++i ) {
index_cost[i] = i << 8;
}
index_cost[0] = vp8_cost_zero(205);
index_cost[1] = vp8_cost_zero(40);
index_cost[2] = vp8_cost_zero(8);
index_cost[3] = vp8_cost_zero(2);
cost = index_cost[0] +
vp8_mv_bit_cost(&target_mv,
&mv_ref_list[0],
XMVCOST, 96,
xd->allow_high_precision_mv);
//for (i = 1; i < MAX_MV_REFS; ++i ) {
for (i = 1; i < 4; ++i ) {
cost2 = index_cost[i] +
vp8_mv_bit_cost(&target_mv,
&mv_ref_list[i],
XMVCOST, 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
static void update_mode(
vp8_writer *const w,
int n,
vp8_token tok [/* n */],
vp8_tree tree,
vp8_prob Pnew [/* n-1 */],
vp8_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;
vp8_tree_probs_from_distribution(
n--, tok, tree,
Pnew, bct, num_events,
256, 1
);
do {
new_b += vp8_cost_branch(bct[i], Pnew[i]);
211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280
old_b += vp8_cost_branch(bct[i], Pcur[i]);
} while (++i < n);
if (new_b + (n << 8) < old_b) {
int i = 0;
vp8_write_bit(w, 1);
do {
const vp8_prob p = Pnew[i];
vp8_write_literal(w, Pcur[i] = p ? p : 1, 8);
} while (++i < n);
} else
vp8_write_bit(w, 0);
}
static void update_mbintra_mode_probs(VP8_COMP *cpi) {
VP8_COMMON *const cm = & cpi->common;
vp8_writer *const w = & cpi->bc;
{
vp8_prob Pnew [VP8_YMODES - 1];
unsigned int bct [VP8_YMODES - 1] [2];
update_mode(
w, VP8_YMODES, vp8_ymode_encodings, vp8_ymode_tree,
Pnew, cm->fc.ymode_prob, bct, (unsigned int *)cpi->ymode_count
);
}
}
void update_skip_probs(VP8_COMP *cpi) {
VP8_COMMON *const pc = & cpi->common;
int prob_skip_false[3] = {0, 0, 0};
int k;
for (k = 0; k < MBSKIP_CONTEXTS; ++k) {
if ((cpi->skip_false_count[k] + cpi->skip_true_count[k])) {
prob_skip_false[k] =
cpi->skip_false_count[k] * 256 /
(cpi->skip_false_count[k] + cpi->skip_true_count[k]);
if (prob_skip_false[k] <= 1)
prob_skip_false[k] = 1;
if (prob_skip_false[k] > 255)
prob_skip_false[k] = 255;
} else
prob_skip_false[k] = 128;
pc->mbskip_pred_probs[k] = prob_skip_false[k];
}
}
#if CONFIG_SWITCHABLE_INTERP
void update_switchable_interp_probs(VP8_COMP *cpi) {
VP8_COMMON *const pc = & cpi->common;
vp8_writer *const w = & cpi->bc;
unsigned int branch_ct[32][2];
int i, j;
for (j = 0; j <= VP8_SWITCHABLE_FILTERS; ++j) {
//for (j = 0; j <= 0; ++j) {
/*
if (!cpi->dummy_packing)
#if VP8_SWITCHABLE_FILTERS == 3
printf("HELLO %d %d %d\n", cpi->switchable_interp_count[j][0],
cpi->switchable_interp_count[j][1], cpi->switchable_interp_count[j][2]);
#else
281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350
printf("HELLO %d %d\n", cpi->switchable_interp_count[j][0],
cpi->switchable_interp_count[j][1]);
#endif
*/
vp8_tree_probs_from_distribution(
VP8_SWITCHABLE_FILTERS,
vp8_switchable_interp_encodings, vp8_switchable_interp_tree,
pc->fc.switchable_interp_prob[j], branch_ct, cpi->switchable_interp_count[j],
256, 1
);
for (i = 0; i < VP8_SWITCHABLE_FILTERS - 1; ++i) {
if (pc->fc.switchable_interp_prob[j][i] < 1)
pc->fc.switchable_interp_prob[j][i] = 1;
vp8_write_literal(w, pc->fc.switchable_interp_prob[j][i], 8);
/*
if (!cpi->dummy_packing)
#if VP8_SWITCHABLE_FILTERS == 3
printf("Probs %d %d [%d]\n",
pc->fc.switchable_interp_prob[j][0],
pc->fc.switchable_interp_prob[j][1], pc->frame_type);
#else
printf("Probs %d [%d]\n", pc->fc.switchable_interp_prob[j][0],
pc->frame_type);
#endif
*/
}
}
/*
if (!cpi->dummy_packing)
#if VP8_SWITCHABLE_FILTERS == 3
printf("Probs %d %d [%d]\n",
pc->fc.switchable_interp_prob[0], pc->fc.switchable_interp_prob[1], pc->frame_type);
#else
printf("Probs %d [%d]\n", pc->fc.switchable_interp_prob[0], pc->frame_type);
#endif
*/
}
#endif
// This function updates the reference frame prediction stats
static void update_refpred_stats(VP8_COMP *cpi) {
VP8_COMMON *const cm = & cpi->common;
int i;
int tot_count;
vp8_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++) {
tot_count = cpi->ref_pred_count[i][0] + cpi->ref_pred_count[i][1];
if (tot_count) {
new_pred_probs[i] =
(cpi->ref_pred_count[i][0] * 255 + (tot_count >> 1)) / tot_count;
// Clamp to minimum allowed value
new_pred_probs[i] += !new_pred_probs[i];
} else
new_pred_probs[i] = 128;
// Decide whether or not to update the reference frame probs.
351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420
// Returned costs are in 1/256 bit units.
old_cost =
(cpi->ref_pred_count[i][0] * vp8_cost_zero(cm->ref_pred_probs[i])) +
(cpi->ref_pred_count[i][1] * vp8_cost_one(cm->ref_pred_probs[i]));
new_cost =
(cpi->ref_pred_count[i][0] * vp8_cost_zero(new_pred_probs[i])) +
(cpi->ref_pred_count[i][1] * vp8_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 write_ymode(vp8_writer *bc, int m, const vp8_prob *p) {
vp8_write_token(bc, vp8_ymode_tree, p, vp8_ymode_encodings + m);
}
static void kfwrite_ymode(vp8_writer *bc, int m, const vp8_prob *p) {
vp8_write_token(bc, vp8_kf_ymode_tree, p, vp8_kf_ymode_encodings + m);
}
#if CONFIG_SUPERBLOCKS
static void sb_kfwrite_ymode(vp8_writer *bc, int m, const vp8_prob *p) {
vp8_write_token(bc, vp8_uv_mode_tree, p, vp8_sb_kf_ymode_encodings + m);
}
#endif
static void write_i8x8_mode(vp8_writer *bc, int m, const vp8_prob *p) {
vp8_write_token(bc, vp8_i8x8_mode_tree, p, vp8_i8x8_mode_encodings + m);
}
static void write_uv_mode(vp8_writer *bc, int m, const vp8_prob *p) {
vp8_write_token(bc, vp8_uv_mode_tree, p, vp8_uv_mode_encodings + m);
}
static void write_bmode(vp8_writer *bc, int m, const vp8_prob *p) {
vp8_write_token(bc, vp8_bmode_tree, p, vp8_bmode_encodings + m);
}
static void write_split(vp8_writer *bc, int x, const vp8_prob *p) {
vp8_write_token(
bc, vp8_mbsplit_tree, p, vp8_mbsplit_encodings + x
);
}
static int prob_update_savings(const unsigned int *ct,
const vp8_prob oldp, const vp8_prob newp,
const vp8_prob upd) {
const int old_b = vp8_cost_branch256(ct, oldp);
const int new_b = vp8_cost_branch256(ct, newp);
const int update_b = 2048 + vp8_cost_upd256;
return (old_b - new_b - update_b);
}
static int prob_diff_update_savings(const unsigned int *ct,
const vp8_prob oldp, const vp8_prob newp,
const vp8_prob upd) {
const int old_b = vp8_cost_branch256(ct, oldp);
const int new_b = vp8_cost_branch256(ct, newp);
const int update_b = (newp == oldp ? 0 :
prob_diff_update_cost(newp, oldp) + vp8_cost_upd256);
return (old_b - new_b - update_b);
421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490
}
static int prob_diff_update_savings_search(const unsigned int *ct,
const vp8_prob oldp, vp8_prob *bestp,
const vp8_prob upd) {
const int old_b = vp8_cost_branch256(ct, oldp);
int new_b, update_b, savings, bestsavings, step;
vp8_prob newp, bestnewp;
bestsavings = 0;
bestnewp = oldp;
step = (*bestp > oldp ? -1 : 1);
for (newp = *bestp; newp != oldp; newp += step) {
new_b = vp8_cost_branch256(ct, newp);
update_b = prob_diff_update_cost(newp, oldp) + vp8_cost_upd256;
savings = old_b - new_b - update_b;
if (savings > bestsavings) {
bestsavings = savings;
bestnewp = newp;
}
}
*bestp = bestnewp;
return bestsavings;
}
static void pack_tokens_c(vp8_writer *w, const TOKENEXTRA *p, int xcount) {
const TOKENEXTRA *const stop = p + xcount;
unsigned int split;
unsigned int shift;
int count = w->count;
unsigned int range = w->range;
unsigned int lowvalue = w->lowvalue;
while (p < stop) {
const int t = p->Token;
vp8_token *const a = vp8_coef_encodings + t;
const vp8_extra_bit_struct *const b = vp8_extra_bits + t;
int i = 0;
const unsigned char *pp = p->context_tree;
int v = a->value;
int n = a->Len;
/* 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 = vp8_coef_tree[i + bb];
if (bb) {
lowvalue += split;
range = range - split;
} else {
range = split;
}
shift = vp8_norm[range];
range <<= shift;
count += shift;
if (count >= 0) {
int offset = shift - count;
if ((lowvalue << (offset - 1)) & 0x80000000) {
int x = w->pos - 1;
491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560
while (x >= 0 && w->buffer[x] == 0xff) {
w->buffer[x] = (unsigned char)0;
x--;
}
w->buffer[x] += 1;
}
w->buffer[w->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 = vp8_norm[range];
range <<= shift;
count += shift;
if (count >= 0) {
int offset = shift - count;
if ((lowvalue << (offset - 1)) & 0x80000000) {
int x = w->pos - 1;
while (x >= 0 && w->buffer[x] == 0xff) {
w->buffer[x] = (unsigned char)0;
x--;
}
w->buffer[x] += 1;
}
w->buffer[w->pos++] = (lowvalue >> (24 - offset));
lowvalue <<= offset;
shift = count;
lowvalue &= 0xffffff;
count -= 8;
}
lowvalue <<= shift;
} while (n);
}
561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630
{
split = (range + 1) >> 1;
if (e & 1) {
lowvalue += split;
range = range - split;
} else {
range = split;
}
range <<= 1;
if ((lowvalue & 0x80000000)) {
int x = w->pos - 1;
while (x >= 0 && w->buffer[x] == 0xff) {
w->buffer[x] = (unsigned char)0;
x--;
}
w->buffer[x] += 1;
}
lowvalue <<= 1;
if (!++count) {
count = -8;
w->buffer[w->pos++] = (lowvalue >> 24);
lowvalue &= 0xffffff;
}
}
}
++p;
}
w->count = count;
w->lowvalue = lowvalue;
w->range = range;
}
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
(
vp8_writer *w, MB_PREDICTION_MODE m, const vp8_prob *p
) {
#if CONFIG_DEBUG
assert(NEARESTMV <= m && m <= SPLITMV);
#endif
vp8_write_token(w, vp8_mv_ref_tree, p,
vp8_mv_ref_encoding_array - NEARESTMV + m);
}
#if CONFIG_SUPERBLOCKS
631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700
static void write_sb_mv_ref(vp8_writer *w, MB_PREDICTION_MODE m, const vp8_prob *p) {
#if CONFIG_DEBUG
assert(NEARESTMV <= m && m < SPLITMV);
#endif
vp8_write_token(w, vp8_sb_mv_ref_tree, p,
vp8_sb_mv_ref_encoding_array - NEARESTMV + m);
}
#endif
static void write_sub_mv_ref
(
vp8_writer *w, B_PREDICTION_MODE m, const vp8_prob *p
) {
#if CONFIG_DEBUG
assert(LEFT4X4 <= m && m <= NEW4X4);
#endif
vp8_write_token(w, vp8_sub_mv_ref_tree, p,
vp8_sub_mv_ref_encoding_array - LEFT4X4 + m);
}
#if CONFIG_NEWMVENTROPY
static void write_nmv (vp8_writer *w, 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;
vp8_encode_nmv(w, &e, &ref->as_mv, nmvc);
vp8_encode_nmv_fp(w, &e, &ref->as_mv, nmvc, usehp);
}
#else
static void write_mv
(
vp8_writer *w, const MV *mv, const int_mv *ref, const MV_CONTEXT *mvc
) {
MV e;
e.row = mv->row - ref->as_mv.row;
e.col = mv->col - ref->as_mv.col;
vp8_encode_motion_vector(w, &e, mvc);
}
static void write_mv_hp
(
vp8_writer *w, const MV *mv, const int_mv *ref, const MV_CONTEXT_HP *mvc
) {
MV e;
e.row = mv->row - ref->as_mv.row;
e.col = mv->col - ref->as_mv.col;
vp8_encode_motion_vector_hp(w, &e, mvc);
}
#endif /* CONFIG_NEWMVENTROPY */
// 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(vp8_writer *w,
const MB_MODE_INFO *mi, const MACROBLOCKD *xd) {
// Encode the MB segment id.
if (xd->segmentation_enabled && xd->update_mb_segmentation_map) {
switch (mi->segment_id) {
case 0:
vp8_write(w, 0, xd->mb_segment_tree_probs[0]);
vp8_write(w, 0, xd->mb_segment_tree_probs[1]);
break;
case 1:
vp8_write(w, 0, xd->mb_segment_tree_probs[0]);
vp8_write(w, 1, xd->mb_segment_tree_probs[1]);
701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770
break;
case 2:
vp8_write(w, 1, xd->mb_segment_tree_probs[0]);
vp8_write(w, 0, xd->mb_segment_tree_probs[2]);
break;
case 3:
vp8_write(w, 1, xd->mb_segment_tree_probs[0]);
vp8_write(w, 1, xd->mb_segment_tree_probs[2]);
break;
// TRAP.. This should not happen
default:
vp8_write(w, 0, xd->mb_segment_tree_probs[0]);
vp8_write(w, 0, xd->mb_segment_tree_probs[1]);
break;
}
}
}
// This function encodes the reference frame
static void encode_ref_frame(vp8_writer *const w,
VP8_COMMON *const cm,
MACROBLOCKD *xd,
int segment_id,
MV_REFERENCE_FRAME rf) {
int seg_ref_active;
int seg_ref_count = 0;
seg_ref_active = segfeature_active(xd,
segment_id,
SEG_LVL_REF_FRAME);
if (seg_ref_active) {
seg_ref_count = check_segref(xd, segment_id, INTRA_FRAME) +
check_segref(xd, segment_id, LAST_FRAME) +
check_segref(xd, segment_id, GOLDEN_FRAME) +
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;
vp8_prob pred_prob;
MV_REFERENCE_FRAME pred_rf;
// Get the context probability the prediction flag
pred_prob = get_pred_prob(cm, xd, PRED_REF);
// Get the predicted value.
pred_rf = 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);
set_pred_flag(xd, PRED_REF, prediction_flag);
vp8_write(w, prediction_flag, pred_prob);
// If not predicted correctly then code value explicitly
if (!prediction_flag) {
vp8_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] *=
771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840
check_segref(xd, segment_id, INTRA_FRAME);
mod_refprobs[LAST_FRAME] *=
check_segref(xd, segment_id, LAST_FRAME);
mod_refprobs[GOLDEN_FRAME] *=
(check_segref(xd, segment_id, GOLDEN_FRAME) *
check_segref(xd, segment_id, ALTREF_FRAME));
}
if (mod_refprobs[0]) {
vp8_write(w, (rf != INTRA_FRAME), mod_refprobs[0]);
}
// Inter coded
if (rf != INTRA_FRAME) {
if (mod_refprobs[1]) {
vp8_write(w, (rf != LAST_FRAME), mod_refprobs[1]);
}
if (rf != LAST_FRAME) {
if (mod_refprobs[2]) {
vp8_write(w, (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(VP8_COMP *const cpi) {
VP8_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 = (rf_intra + rf_inter)
? rf_intra * 255 / (rf_intra + rf_inter) : 1;
if (!cm->prob_intra_coded)
cm->prob_intra_coded = 1;
cm->prob_last_coded = rf_inter ? (rfct[LAST_FRAME] * 255) / rf_inter : 128;
if (!cm->prob_last_coded)
cm->prob_last_coded = 1;
cm->prob_gf_coded = (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME])
? (rfct[GOLDEN_FRAME] * 255) /
(rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME]) : 128;
if (!cm->prob_gf_coded)
cm->prob_gf_coded = 1;
// Compute a modified set of probabilities to use when prediction of the
// reference frame fails
compute_mod_refprobs(cm);
}
static void pack_inter_mode_mvs(VP8_COMP *const cpi) {
int i;
VP8_COMMON *const pc = & cpi->common;
vp8_writer *const w = & cpi->bc;
#if CONFIG_NEWMVENTROPY
const nmv_context *nmvc = &pc->fc.nmvc;
#else
841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910
const MV_CONTEXT *mvc = pc->fc.mvc;
const MV_CONTEXT_HP *mvc_hp = pc->fc.mvc_hp;
#endif
MACROBLOCK *x = &cpi->mb;
MACROBLOCKD *xd = &cpi->mb.e_mbd;
MODE_INFO *m;
MODE_INFO *prev_m;
const int mis = pc->mode_info_stride;
int mb_row, mb_col;
int row, col;
// Values used in prediction model coding
vp8_prob pred_prob;
unsigned char prediction_flag;
int row_delta[4] = { 0, +1, 0, -1};
int col_delta[4] = { +1, -1, +1, +1};
//final_packing = !cpi->dummy_packing;
cpi->mb.partition_info = cpi->mb.pi;
// Update the probabilities used to encode reference frame data
update_ref_probs(cpi);
#ifdef ENTROPY_STATS
active_section = 1;
#endif
if (pc->mb_no_coeff_skip) {
int k;
update_skip_probs(cpi);
for (k = 0; k < MBSKIP_CONTEXTS; ++k)
vp8_write_literal(w, pc->mbskip_pred_probs[k], 8);
}
#if CONFIG_PRED_FILTER
// Write the prediction filter mode used for this frame
vp8_write_literal(w, pc->pred_filter_mode, 2);
// Write prediction filter on/off probability if signaling at MB level
if (pc->pred_filter_mode == 2)
vp8_write_literal(w, pc->prob_pred_filter_off, 8);
// printf("pred_filter_mode:%d prob_pred_filter_off:%d\n",
// pc->pred_filter_mode, pc->prob_pred_filter_off);
#endif
#if CONFIG_SWITCHABLE_INTERP
if (pc->mcomp_filter_type == SWITCHABLE)
update_switchable_interp_probs(cpi);
#endif
vp8_write_literal(w, pc->prob_intra_coded, 8);
vp8_write_literal(w, pc->prob_last_coded, 8);
vp8_write_literal(w, pc->prob_gf_coded, 8);
if (cpi->common.comp_pred_mode == HYBRID_PREDICTION) {
vp8_write(w, 1, 128);
vp8_write(w, 1, 128);
for (i = 0; i < COMP_PRED_CONTEXTS; i++) {
if (cpi->single_pred_count[i] + cpi->comp_pred_count[i]) {
pc->prob_comppred[i] = cpi->single_pred_count[i] * 255 /
(cpi->single_pred_count[i] + cpi->comp_pred_count[i]);
if (pc->prob_comppred[i] < 1)
pc->prob_comppred[i] = 1;
} else {
pc->prob_comppred[i] = 128;
}
911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980
vp8_write_literal(w, pc->prob_comppred[i], 8);
}
} else if (cpi->common.comp_pred_mode == SINGLE_PREDICTION_ONLY) {
vp8_write(w, 0, 128);
} else { /* compound prediction only */
vp8_write(w, 1, 128);
vp8_write(w, 0, 128);
}
update_mbintra_mode_probs(cpi);
#if CONFIG_NEWMVENTROPY
vp8_write_nmvprobs(cpi, xd->allow_high_precision_mv);
#else
if (xd->allow_high_precision_mv)
vp8_write_mvprobs_hp(cpi);
else
vp8_write_mvprobs(cpi);
#endif
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
vp8_write(w, 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;
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;