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vpx/vp8/encoder/bitstream.c
John Koleszar cba980e3eb Merge remote branch 'internal/upstream' into HEAD
2011-03-18 00:05:06 -04:00

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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 "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 "vp8/common/pragmas.h"
#include "vpx_mem/vpx_mem.h"
#include "bitstream.h"
#if CONFIG_SEGMENTATION
static int segment_cost = 0;
#endif
const int vp8cx_base_skip_false_prob[128] =
{
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
251, 248, 244, 240, 236, 232, 229, 225,
221, 217, 213, 208, 204, 199, 194, 190,
187, 183, 179, 175, 172, 168, 164, 160,
157, 153, 149, 145, 142, 138, 134, 130,
127, 124, 120, 117, 114, 110, 107, 104,
101, 98, 95, 92, 89, 86, 83, 80,
77, 74, 71, 68, 65, 62, 59, 56,
53, 50, 47, 44, 41, 38, 35, 32,
30, 28, 26, 24, 22, 20, 18, 16,
};
#ifdef VP8REF
#define __int64 long long
#endif
#if defined(SECTIONBITS_OUTPUT)
unsigned __int64 Sectionbits[500];
#endif
#ifdef ENTROPY_STATS
int intra_mode_stats[10][10][10];
static unsigned int tree_update_hist [BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [vp8_coef_tokens-1] [2];
extern unsigned int active_section;
#endif
#ifdef MODE_STATS
int count_mb_seg[4] = { 0, 0, 0, 0 };
#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]);
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 x = & 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, x->fc.ymode_prob, bct, (unsigned int *)cpi->ymode_count
);
}
{
vp8_prob Pnew [VP8_UV_MODES-1];
unsigned int bct [VP8_UV_MODES-1] [2];
update_mode(
w, VP8_UV_MODES, vp8_uv_mode_encodings, vp8_uv_mode_tree,
Pnew, x->fc.uv_mode_prob, bct, (unsigned int *)cpi->uv_mode_count
);
}
}
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);
}
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)
{
vp8_write_token(
bc, vp8_mbsplit_tree, vp8_mbsplit_probs, vp8_mbsplit_encodings + x
);
}
static const unsigned int norm[256] =
{
0, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
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;
if (p->skip_eob_node)
{
n--;
i = 2;
}
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 = 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);
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 = 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);
}
{
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 pack_tokens_into_partitions_c(VP8_COMP *cpi, unsigned char *cx_data, int num_part, int *size)
{
int i;
unsigned char *ptr = cx_data;
unsigned int shift;
vp8_writer *w = &cpi->bc2;
*size = 3 * (num_part - 1);
ptr = cx_data + (*size);
for (i = 0; i < num_part; i++)
{
vp8_start_encode(w, ptr);
{
unsigned int split;
int count = w->count;
unsigned int range = w->range;
unsigned int lowvalue = w->lowvalue;
int mb_row;
for (mb_row = i; mb_row < cpi->common.mb_rows; mb_row += num_part)
{
TOKENEXTRA *p = cpi->tplist[mb_row].start;
TOKENEXTRA *stop = cpi->tplist[mb_row].stop;
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;
if (p->skip_eob_node)
{
n--;
i = 2;
}
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 = 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);
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 = 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);
}
{
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;
}
vp8_stop_encode(w);
*size += w->pos;
if (i < (num_part - 1))
{
write_partition_size(cx_data, w->pos);
cx_data += 3;
ptr += w->pos;
}
}
}
static void pack_mb_row_tokens_c(VP8_COMP *cpi, vp8_writer *w)
{
unsigned int split;
int count = w->count;
unsigned int range = w->range;
unsigned int lowvalue = w->lowvalue;
unsigned int shift;
int mb_row;
for (mb_row = 0; mb_row < cpi->common.mb_rows; mb_row++)
{
TOKENEXTRA *p = cpi->tplist[mb_row].start;
TOKENEXTRA *stop = cpi->tplist[mb_row].stop;
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;
if (p->skip_eob_node)
{
n--;
i = 2;
}
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 = 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);
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 = 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);
}
{
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_mv_ref
(
vp8_writer *w, MB_PREDICTION_MODE m, const vp8_prob *p
)
{
assert(NEARESTMV <= m && m <= SPLITMV);
vp8_write_token(w, vp8_mv_ref_tree, p,
vp8_mv_ref_encoding_array - NEARESTMV + m);
}
static void write_sub_mv_ref
(
vp8_writer *w, B_PREDICTION_MODE m, const vp8_prob *p
)
{
assert(LEFT4X4 <= m && m <= NEW4X4);
vp8_write_token(w, vp8_sub_mv_ref_tree, p,
vp8_sub_mv_ref_encoding_array - LEFT4X4 + m);
}
static void write_mv
(
vp8_writer *w, const MV *mv, const MV *ref, const MV_CONTEXT *mvc
)
{
MV e;
e.row = mv->row - ref->row;
e.col = mv->col - ref->col;
vp8_encode_motion_vector(w, &e, mvc);
}
static void write_mb_features(vp8_writer *w, const MB_MODE_INFO *mi, const MACROBLOCKD *x)
{
// Encode the MB segment id.
if (x->segmentation_enabled && x->update_mb_segmentation_map)
{
switch (mi->segment_id)
{
case 0:
vp8_write(w, 0, x->mb_segment_tree_probs[0]);
vp8_write(w, 0, x->mb_segment_tree_probs[1]);
#if CONFIG_SEGMENTATION
segment_cost += vp8_cost_zero(x->mb_segment_tree_probs[0]) + vp8_cost_zero(x->mb_segment_tree_probs[1]);
#endif
break;
case 1:
vp8_write(w, 0, x->mb_segment_tree_probs[0]);
vp8_write(w, 1, x->mb_segment_tree_probs[1]);
#if CONFIG_SEGMENTATION
segment_cost += vp8_cost_zero(x->mb_segment_tree_probs[0]) + vp8_cost_one(x->mb_segment_tree_probs[1]);
#endif
break;
case 2:
vp8_write(w, 1, x->mb_segment_tree_probs[0]);
vp8_write(w, 0, x->mb_segment_tree_probs[2]);
#if CONFIG_SEGMENTATION
segment_cost += vp8_cost_one(x->mb_segment_tree_probs[0]) + vp8_cost_zero(x->mb_segment_tree_probs[2]);
#endif
break;
case 3:
vp8_write(w, 1, x->mb_segment_tree_probs[0]);
vp8_write(w, 1, x->mb_segment_tree_probs[2]);
#if CONFIG_SEGMENTATION
segment_cost += vp8_cost_one(x->mb_segment_tree_probs[0]) + vp8_cost_one(x->mb_segment_tree_probs[2]);
#endif
break;
// TRAP.. This should not happen
default:
vp8_write(w, 0, x->mb_segment_tree_probs[0]);
vp8_write(w, 0, x->mb_segment_tree_probs[1]);
#if CONFIG_SEGMENTATION
segment_cost += vp8_cost_zero(x->mb_segment_tree_probs[0]) + vp8_cost_zero(x->mb_segment_tree_probs[1]);
#endif
break;
}
}
}
static void pack_inter_mode_mvs(VP8_COMP *const cpi)
{
VP8_COMMON *const pc = & cpi->common;
vp8_writer *const w = & cpi->bc;
const MV_CONTEXT *mvc = pc->fc.mvc;
MACROBLOCKD *xd = &cpi->mb.e_mbd;
#if CONFIG_SEGMENTATION
int left_id, above_id;
int i;
int sum;
int index = 0;
#endif
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];
MODE_INFO *m = pc->mi, *ms;
const int mis = pc->mode_info_stride;
int mb_row = -1;
int prob_last_coded;
int prob_gf_coded;
int prob_skip_false = 0;
ms = pc->mi - 1;
cpi->mb.partition_info = cpi->mb.pi;
// Calculate the probabilities to be used to code the reference frame based on actual useage this frame
if (!(cpi->prob_intra_coded = rf_intra * 255 / (rf_intra + rf_inter)))
cpi->prob_intra_coded = 1;
prob_last_coded = rf_inter ? (rfct[LAST_FRAME] * 255) / rf_inter : 128;
if (!prob_last_coded)
prob_last_coded = 1;
prob_gf_coded = (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME])
? (rfct[GOLDEN_FRAME] * 255) / (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME]) : 128;
if (!prob_gf_coded)
prob_gf_coded = 1;
#ifdef ENTROPY_STATS
active_section = 1;
#endif
if (pc->mb_no_coeff_skip)
{
prob_skip_false = cpi->skip_false_count * 256 / (cpi->skip_false_count + cpi->skip_true_count);
if (prob_skip_false <= 1)
prob_skip_false = 1;
if (prob_skip_false > 255)
prob_skip_false = 255;
cpi->prob_skip_false = prob_skip_false;
vp8_write_literal(w, prob_skip_false, 8);
}
vp8_write_literal(w, cpi->prob_intra_coded, 8);
vp8_write_literal(w, prob_last_coded, 8);
vp8_write_literal(w, prob_gf_coded, 8);
update_mbintra_mode_probs(cpi);
vp8_write_mvprobs(cpi);
#if CONFIG_SEGMENTATION
vp8_write_bit(w, (xd->temporal_update) ? 1:0);
#endif
while (++mb_row < pc->mb_rows)
{
int mb_col = -1;
while (++mb_col < pc->mb_cols)
{
const MB_MODE_INFO *const mi = & m->mbmi;
const MV_REFERENCE_FRAME rf = mi->ref_frame;
const MB_PREDICTION_MODE mode = mi->mode;
//MACROBLOCKD *xd = &cpi->mb.e_mbd;
// 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;
xd->up_available = (mb_row != 0);
xd->left_available = (mb_col != 0);
#ifdef ENTROPY_STATS
active_section = 9;
#endif
if (cpi->mb.e_mbd.update_mb_segmentation_map)
{
#if CONFIG_SEGMENTATION
if (xd->temporal_update)
{
sum = 0;
if (mb_col != 0)
sum += (m-1)->mbmi.segment_flag;
if (mb_row != 0)
sum += (m-pc->mb_cols)->mbmi.segment_flag;
if (m->mbmi.segment_flag == 0)
{
vp8_write(w,0,xd->mb_segment_tree_probs[3+sum]);
segment_cost += vp8_cost_zero(xd->mb_segment_tree_probs[3+sum]);
}
else
{
vp8_write(w,1,xd->mb_segment_tree_probs[3+sum]);
segment_cost += vp8_cost_one(xd->mb_segment_tree_probs[3+sum]);
write_mb_features(w, mi, &cpi->mb.e_mbd);
cpi->segmentation_map[index] = mi->segment_id;
}
}
else
{
write_mb_features(w, mi, &cpi->mb.e_mbd);
cpi->segmentation_map[index] = mi->segment_id;
}
index++;
#else
write_mb_features(w, mi, &cpi->mb.e_mbd);
#endif
}
if (pc->mb_no_coeff_skip)
vp8_encode_bool(w, m->mbmi.mb_skip_coeff, prob_skip_false);
if (rf == INTRA_FRAME)
{
vp8_write(w, 0, cpi->prob_intra_coded);
#ifdef ENTROPY_STATS
active_section = 6;
#endif
write_ymode(w, mode, pc->fc.ymode_prob);
if (mode == B_PRED)
{
int j = 0;
do
write_bmode(w, m->bmi[j].mode, pc->fc.bmode_prob);
while (++j < 16);
}
write_uv_mode(w, mi->uv_mode, pc->fc.uv_mode_prob);
}
else /* inter coded */
{
MV best_mv;
vp8_prob mv_ref_p [VP8_MVREFS-1];
vp8_write(w, 1, cpi->prob_intra_coded);
if (rf == LAST_FRAME)
vp8_write(w, 0, prob_last_coded);
else
{
vp8_write(w, 1, prob_last_coded);
vp8_write(w, (rf == GOLDEN_FRAME) ? 0 : 1, prob_gf_coded);
}
{
MV n1, n2;
int ct[4];
vp8_find_near_mvs(xd, m, &n1, &n2, &best_mv, ct, rf, cpi->common.ref_frame_sign_bias);
vp8_mv_ref_probs(mv_ref_p, ct);
#ifdef ENTROPY_STATS
accum_mv_refs(mode, ct);
#endif
}
#ifdef ENTROPY_STATS
active_section = 3;
#endif
write_mv_ref(w, mode, mv_ref_p);
switch (mode) /* new, split require MVs */
{
case NEWMV:
#ifdef ENTROPY_STATS
active_section = 5;
#endif
write_mv(w, &mi->mv.as_mv, &best_mv, mvc);
break;
case SPLITMV:
{
int j = 0;
#ifdef MODE_STATS
++count_mb_seg [mi->partitioning];
#endif
write_split(w, mi->partitioning);
do
{
const B_MODE_INFO *const b = cpi->mb.partition_info->bmi + j;
const int *const L = vp8_mbsplits [mi->partitioning];
int k = -1; /* first block in subset j */
int mv_contz;
while (j != L[++k])
if (k >= 16)
assert(0);
mv_contz = vp8_mv_cont
(&(vp8_left_bmi(m, k)->mv.as_mv),
&(vp8_above_bmi(m, k, mis)->mv.as_mv));
write_sub_mv_ref(w, b->mode, vp8_sub_mv_ref_prob2 [mv_contz]); //pc->fc.sub_mv_ref_prob);
if (b->mode == NEW4X4)
{
#ifdef ENTROPY_STATS
active_section = 11;
#endif
write_mv(w, &b->mv.as_mv, &best_mv, (const MV_CONTEXT *) mvc);
}
}
while (++j < cpi->mb.partition_info->count);
}
break;
default:
break;
}
}
++m;
cpi->mb.partition_info++;
}
++m; /* skip L prediction border */
cpi->mb.partition_info++;
}
}
static void write_kfmodes(VP8_COMP *cpi)
{
vp8_writer *const bc = & cpi->bc;
const VP8_COMMON *const c = & cpi->common;
/* const */
MODE_INFO *m = c->mi;
#if CONFIG_SEGMENTATION
int left_id, above_id;
int i;
int index = 0;
#endif
int mb_row = -1;
int prob_skip_false = 0;
if (c->mb_no_coeff_skip)
{
prob_skip_false = cpi->skip_false_count * 256 / (cpi->skip_false_count + cpi->skip_true_count);
if (prob_skip_false <= 1)
prob_skip_false = 1;
if (prob_skip_false >= 255)
prob_skip_false = 255;
cpi->prob_skip_false = prob_skip_false;
vp8_write_literal(bc, prob_skip_false, 8);
}
while (++mb_row < c->mb_rows)
{
int mb_col = -1;
while (++mb_col < c->mb_cols)
{
const int ym = m->mbmi.mode;
#if CONFIG_SEGMENTATION
MACROBLOCKD *xd = &cpi->mb.e_mbd;
xd->up_available = (mb_row != 0);
xd->left_available = (mb_col != 0);
#endif
if (cpi->mb.e_mbd.update_mb_segmentation_map)
{
#if CONFIG_SEGMENTATION
write_mb_features(bc, &m->mbmi, &cpi->mb.e_mbd);
cpi->segmentation_map[index] = m->mbmi.segment_id;
index++;
#else
write_mb_features(bc, &m->mbmi, &cpi->mb.e_mbd);
#endif
}
if (c->mb_no_coeff_skip)
vp8_encode_bool(bc, m->mbmi.mb_skip_coeff, prob_skip_false);
kfwrite_ymode(bc, ym, c->kf_ymode_prob);
if (ym == B_PRED)
{
const int mis = c->mode_info_stride;
int i = 0;
do
{
const B_PREDICTION_MODE A = vp8_above_bmi(m, i, mis)->mode;
const B_PREDICTION_MODE L = vp8_left_bmi(m, i)->mode;
const int bm = m->bmi[i].mode;
#ifdef ENTROPY_STATS
++intra_mode_stats [A] [L] [bm];
#endif
write_bmode(bc, bm, c->kf_bmode_prob [A] [L]);
}
while (++i < 16);
}
write_uv_mode(bc, (m++)->mbmi.uv_mode, c->kf_uv_mode_prob);
}
m++; // skip L prediction border
}
}
int vp8_estimate_entropy_savings(VP8_COMP *cpi)
{
int i = 0;
int savings = 0;
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];
int new_intra, new_last, gf_last, oldtotal, newtotal;
int ref_frame_cost[MAX_REF_FRAMES];
vp8_clear_system_state(); //__asm emms;
if (cpi->common.frame_type != KEY_FRAME)
{
if (!(new_intra = rf_intra * 255 / (rf_intra + rf_inter)))
new_intra = 1;
new_last = rf_inter ? (rfct[LAST_FRAME] * 255) / rf_inter : 128;
gf_last = (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME])
? (rfct[GOLDEN_FRAME] * 255) / (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME]) : 128;
// new costs
ref_frame_cost[INTRA_FRAME] = vp8_cost_zero(new_intra);
ref_frame_cost[LAST_FRAME] = vp8_cost_one(new_intra)
+ vp8_cost_zero(new_last);
ref_frame_cost[GOLDEN_FRAME] = vp8_cost_one(new_intra)
+ vp8_cost_one(new_last)
+ vp8_cost_zero(gf_last);
ref_frame_cost[ALTREF_FRAME] = vp8_cost_one(new_intra)
+ vp8_cost_one(new_last)
+ vp8_cost_one(gf_last);
newtotal =
rfct[INTRA_FRAME] * ref_frame_cost[INTRA_FRAME] +
rfct[LAST_FRAME] * ref_frame_cost[LAST_FRAME] +
rfct[GOLDEN_FRAME] * ref_frame_cost[GOLDEN_FRAME] +
rfct[ALTREF_FRAME] * ref_frame_cost[ALTREF_FRAME];
// old costs
ref_frame_cost[INTRA_FRAME] = vp8_cost_zero(cpi->prob_intra_coded);
ref_frame_cost[LAST_FRAME] = vp8_cost_one(cpi->prob_intra_coded)
+ vp8_cost_zero(cpi->prob_last_coded);
ref_frame_cost[GOLDEN_FRAME] = vp8_cost_one(cpi->prob_intra_coded)
+ vp8_cost_one(cpi->prob_last_coded)
+ vp8_cost_zero(cpi->prob_gf_coded);
ref_frame_cost[ALTREF_FRAME] = vp8_cost_one(cpi->prob_intra_coded)
+ vp8_cost_one(cpi->prob_last_coded)
+ vp8_cost_one(cpi->prob_gf_coded);
oldtotal =
rfct[INTRA_FRAME] * ref_frame_cost[INTRA_FRAME] +
rfct[LAST_FRAME] * ref_frame_cost[LAST_FRAME] +
rfct[GOLDEN_FRAME] * ref_frame_cost[GOLDEN_FRAME] +
rfct[ALTREF_FRAME] * ref_frame_cost[ALTREF_FRAME];
savings += (oldtotal - newtotal) / 256;
}
do
{
int j = 0;
do
{
int k = 0;
do
{
/* at every context */
/* calc probs and branch cts for this frame only */
//vp8_prob new_p [vp8_coef_tokens-1];
//unsigned int branch_ct [vp8_coef_tokens-1] [2];
int t = 0; /* token/prob index */
vp8_tree_probs_from_distribution(
vp8_coef_tokens, vp8_coef_encodings, vp8_coef_tree,
cpi->frame_coef_probs [i][j][k], cpi->frame_branch_ct [i][j][k], cpi->coef_counts [i][j][k],
256, 1
);
do
{
const unsigned int *ct = cpi->frame_branch_ct [i][j][k][t];
const vp8_prob newp = cpi->frame_coef_probs [i][j][k][t];
const vp8_prob old = cpi->common.fc.coef_probs [i][j][k][t];
const vp8_prob upd = vp8_coef_update_probs [i][j][k][t];
const int old_b = vp8_cost_branch(ct, old);
const int new_b = vp8_cost_branch(ct, newp);
const int update_b = 8 +
((vp8_cost_one(upd) - vp8_cost_zero(upd)) >> 8);
const int s = old_b - new_b - update_b;
if (s > 0)
savings += s;
}
while (++t < vp8_coef_tokens - 1);
}
while (++k < PREV_COEF_CONTEXTS);
}
while (++j < COEF_BANDS);
}
while (++i < BLOCK_TYPES);
return savings;
}
static void update_coef_probs(VP8_COMP *cpi)
{
int i = 0;
vp8_writer *const w = & cpi->bc;
int savings = 0;
vp8_clear_system_state(); //__asm emms;
do
{
int j = 0;
do
{
int k = 0;
do
{
//note: use result from vp8_estimate_entropy_savings, so no need to call vp8_tree_probs_from_distribution here.
/* at every context */
/* calc probs and branch cts for this frame only */
//vp8_prob new_p [vp8_coef_tokens-1];
//unsigned int branch_ct [vp8_coef_tokens-1] [2];
int t = 0; /* token/prob index */
//vp8_tree_probs_from_distribution(
// vp8_coef_tokens, vp8_coef_encodings, vp8_coef_tree,
// new_p, branch_ct, (unsigned int *)cpi->coef_counts [i][j][k],
// 256, 1
// );
do
{
const unsigned int *ct = cpi->frame_branch_ct [i][j][k][t];
const vp8_prob newp = cpi->frame_coef_probs [i][j][k][t];
vp8_prob *Pold = cpi->common.fc.coef_probs [i][j][k] + t;
const vp8_prob old = *Pold;
const vp8_prob upd = vp8_coef_update_probs [i][j][k][t];
const int old_b = vp8_cost_branch(ct, old);
const int new_b = vp8_cost_branch(ct, newp);
const int update_b = 8 +
((vp8_cost_one(upd) - vp8_cost_zero(upd)) >> 8);
const int s = old_b - new_b - update_b;
const int u = s > 0 ? 1 : 0;
vp8_write(w, u, upd);
#ifdef ENTROPY_STATS
++ tree_update_hist [i][j][k][t] [u];
#endif
if (u)
{
/* send/use new probability */
*Pold = newp;
vp8_write_literal(w, newp, 8);
savings += s;
}
}
while (++t < vp8_coef_tokens - 1);
/* Accum token counts for generation of default statistics */
#ifdef ENTROPY_STATS
t = 0;
do
{
context_counters [i][j][k][t] += cpi->coef_counts [i][j][k][t];
}
while (++t < vp8_coef_tokens);
#endif
}
while (++k < PREV_COEF_CONTEXTS);
}
while (++j < COEF_BANDS);
}
while (++i < BLOCK_TYPES);
}
#ifdef PACKET_TESTING
FILE *vpxlogc = 0;
#endif
static void put_delta_q(vp8_writer *bc, int delta_q)
{
if (delta_q != 0)
{
vp8_write_bit(bc, 1);
vp8_write_literal(bc, abs(delta_q), 4);
if (delta_q < 0)
vp8_write_bit(bc, 1);
else
vp8_write_bit(bc, 0);
}
else
vp8_write_bit(bc, 0);
}
void vp8_pack_bitstream(VP8_COMP *cpi, unsigned char *dest, unsigned long *size)
{
int i, j;
VP8_HEADER oh;
VP8_COMMON *const pc = & cpi->common;
vp8_writer *const bc = & cpi->bc;
MACROBLOCKD *const xd = & cpi->mb.e_mbd;
int extra_bytes_packed = 0;
unsigned char *cx_data = dest;
const int *mb_feature_data_bits;
oh.show_frame = (int) pc->show_frame;
oh.type = (int)pc->frame_type;
oh.version = pc->version;
oh.first_partition_length_in_bytes = 0;
mb_feature_data_bits = vp8_mb_feature_data_bits;
cx_data += 3;
#if defined(SECTIONBITS_OUTPUT)
Sectionbits[active_section = 1] += sizeof(VP8_HEADER) * 8 * 256;
#endif
//vp8_kf_default_bmode_probs() is called in vp8_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
//vp8_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 ;
vp8_start_encode(bc, cx_data);
// signal clr type
vp8_write_bit(bc, pc->clr_type);
vp8_write_bit(bc, pc->clamp_type);
}
else
vp8_start_encode(bc, cx_data);
xd->update_mb_segmentation_map = 1;
// Signal whether or not Segmentation is enabled
vp8_write_bit(bc, (xd->segmentation_enabled) ? 1 : 0);
// Indicate which features are enabled
if (xd->segmentation_enabled)
{
// Signal whether or not the segmentation map is being updated.
vp8_write_bit(bc, (xd->update_mb_segmentation_map) ? 1 : 0);
vp8_write_bit(bc, (xd->update_mb_segmentation_data) ? 1 : 0);
if (xd->update_mb_segmentation_data)
{
signed char Data;
vp8_write_bit(bc, (xd->mb_segement_abs_delta) ? 1 : 0);
// For each segmentation feature (Quant and loop filter level)
for (i = 0; i < MB_LVL_MAX; i++)
{
// For each of the segments
for (j = 0; j < MAX_MB_SEGMENTS; j++)
{
Data = xd->segment_feature_data[i][j];
// Frame level data
if (Data)
{
vp8_write_bit(bc, 1);
if (Data < 0)
{
Data = - Data;
vp8_write_literal(bc, Data, mb_feature_data_bits[i]);
vp8_write_bit(bc, 1);
}
else
{
vp8_write_literal(bc, Data, mb_feature_data_bits[i]);
vp8_write_bit(bc, 0);
}
}
else
vp8_write_bit(bc, 0);
}
}
}
if (xd->update_mb_segmentation_map)
{
#if CONFIG_SEGMENTATION
// Write the probs used to decode the segment id for each macro block.
for (i = 0; i < MB_FEATURE_TREE_PROBS+3; i++)
#else
for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
#endif
{
int Data = xd->mb_segment_tree_probs[i];
if (Data != 255)
{
vp8_write_bit(bc, 1);
vp8_write_literal(bc, Data, 8);
}
else
vp8_write_bit(bc, 0);
}
}
}
// Code to determine whether or not to update the scan order.
vp8_write_bit(bc, pc->filter_type);
vp8_write_literal(bc, pc->filter_level, 6);
vp8_write_literal(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).
vp8_write_bit(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
|| cpi->oxcf.error_resilient_mode;
vp8_write_bit(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]
|| cpi->oxcf.error_resilient_mode)
{
xd->last_ref_lf_deltas[i] = xd->ref_lf_deltas[i];
vp8_write_bit(bc, 1);
if (Data > 0)
{
vp8_write_literal(bc, (Data & 0x3F), 6);
vp8_write_bit(bc, 0); // sign
}
else
{
Data = -Data;
vp8_write_literal(bc, (Data & 0x3F), 6);
vp8_write_bit(bc, 1); // sign
}
}
else
vp8_write_bit(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]
|| cpi->oxcf.error_resilient_mode)
{
xd->last_mode_lf_deltas[i] = xd->mode_lf_deltas[i];
vp8_write_bit(bc, 1);
if (Data > 0)
{
vp8_write_literal(bc, (Data & 0x3F), 6);
vp8_write_bit(bc, 0); // sign
}
else
{
Data = -Data;
vp8_write_literal(bc, (Data & 0x3F), 6);
vp8_write_bit(bc, 1); // sign
}
}
else
vp8_write_bit(bc, 0);
}
}
}
//signal here is multi token partition is enabled
vp8_write_literal(bc, pc->multi_token_partition, 2);
// Frame Qbaseline quantizer index
vp8_write_literal(bc, pc->base_qindex, 7);
// Transmit Dc, Second order and Uv quantizer delta information
put_delta_q(bc, pc->y1dc_delta_q);
put_delta_q(bc, pc->y2dc_delta_q);
put_delta_q(bc, pc->y2ac_delta_q);
put_delta_q(bc, pc->uvdc_delta_q);
put_delta_q(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
vp8_write_bit(bc, pc->refresh_golden_frame);
vp8_write_bit(bc, pc->refresh_alt_ref_frame);
// If not being updated from current frame should either GF or ARF be updated from another buffer
if (!pc->refresh_golden_frame)
vp8_write_literal(bc, pc->copy_buffer_to_gf, 2);
if (!pc->refresh_alt_ref_frame)
vp8_write_literal(bc, pc->copy_buffer_to_arf, 2);
// Indicate reference frame sign bias for Golden and ARF frames (always 0 for last frame buffer)
vp8_write_bit(bc, pc->ref_frame_sign_bias[GOLDEN_FRAME]);
vp8_write_bit(bc, pc->ref_frame_sign_bias[ALTREF_FRAME]);
}
vp8_write_bit(bc, pc->refresh_entropy_probs);
if (pc->frame_type != KEY_FRAME)
vp8_write_bit(bc, pc->refresh_last_frame);
#ifdef ENTROPY_STATS
if (pc->frame_type == INTER_FRAME)
active_section = 0;
else
active_section = 7;
#endif
vp8_clear_system_state(); //__asm emms;
//************************************************
// save a copy for later refresh
{
vpx_memcpy(&cpi->common.lfc, &cpi->common.fc, sizeof(cpi->common.fc));
}
update_coef_probs(cpi);
#ifdef ENTROPY_STATS
active_section = 2;
#endif
// Write out the mb_no_coeff_skip flag
vp8_write_bit(bc, pc->mb_no_coeff_skip);
if (pc->frame_type == KEY_FRAME)
{
write_kfmodes(cpi);
#ifdef ENTROPY_STATS
active_section = 8;
#endif
}
else
{
pack_inter_mode_mvs(cpi);
#ifdef ENTROPY_STATS
active_section = 1;
#endif
}
#if CONFIG_SEGMENTATION
//printf("%d\n",segment_cost);
#endif
vp8_stop_encode(bc);
oh.first_partition_length_in_bytes = cpi->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 = VP8_HEADER_SIZE + extra_bytes_packed + cpi->bc.pos;
if (pc->multi_token_partition != ONE_PARTITION)
{
int num_part;
int asize;
num_part = 1 << pc->multi_token_partition;
pack_tokens_into_partitions(cpi, cx_data + bc->pos, num_part, &asize);
*size += asize;
}
else
{
vp8_start_encode(&cpi->bc2, cx_data + bc->pos);
#if CONFIG_MULTITHREAD
if (cpi->b_multi_threaded)
pack_mb_row_tokens(cpi, &cpi->bc2);
else
#endif
pack_tokens(&cpi->bc2, cpi->tok, cpi->tok_count);
vp8_stop_encode(&cpi->bc2);
*size += cpi->bc2.pos;
}
}
#ifdef ENTROPY_STATS
void print_tree_update_probs()
{
int i, j, k, l;
FILE *f = fopen("context.c", "a");
int Sum;
fprintf(f, "\n/* Update probabilities for token entropy tree. */\n\n");
fprintf(f, "const vp8_prob tree_update_probs[BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [vp8_coef_tokens-1] = {\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 < MAX_ENTROPY_TOKENS - 1; l++)
{
Sum = tree_update_hist[i][j][k][l][0] + tree_update_hist[i][j][k][l][1];
if (Sum > 0)
{
if (((tree_update_hist[i][j][k][l][0] * 255) / Sum) > 0)
fprintf(f, "%3ld, ", (tree_update_hist[i][j][k][l][0] * 255) / Sum);
else
fprintf(f, "%3ld, ", 1);
}
else
fprintf(f, "%3ld, ", 128);
}
fprintf(f, "},\n");
}
fprintf(f, " },\n");
}
fprintf(f, " },\n");
}
fprintf(f, "};\n");
fclose(f);
}
#endif
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