421 строка
14 KiB
C
421 строка
14 KiB
C
/*
|
|
* Copyright (c) 2010 The VP8 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 "treereader.h"
|
|
#include "entropymv.h"
|
|
#include "entropymode.h"
|
|
#include "onyxd_int.h"
|
|
#include "findnearmv.h"
|
|
#include "demode.h"
|
|
#if CONFIG_DEBUG
|
|
#include <assert.h>
|
|
#endif
|
|
|
|
static int read_mvcomponent(vp8_reader *r, const MV_CONTEXT *mvc)
|
|
{
|
|
const vp8_prob *const p = (const vp8_prob *) mvc;
|
|
int x = 0;
|
|
|
|
if (vp8_read(r, p [mvpis_short])) /* Large */
|
|
{
|
|
int i = 0;
|
|
|
|
do
|
|
{
|
|
x += vp8_read(r, p [MVPbits + i]) << i;
|
|
}
|
|
while (++i < 3);
|
|
|
|
i = mvlong_width - 1; /* Skip bit 3, which is sometimes implicit */
|
|
|
|
do
|
|
{
|
|
x += vp8_read(r, p [MVPbits + i]) << i;
|
|
}
|
|
while (--i > 3);
|
|
|
|
if (!(x & 0xFFF0) || vp8_read(r, p [MVPbits + 3]))
|
|
x += 8;
|
|
}
|
|
else /* small */
|
|
x = vp8_treed_read(r, vp8_small_mvtree, p + MVPshort);
|
|
|
|
if (x && vp8_read(r, p [MVPsign]))
|
|
x = -x;
|
|
|
|
return x;
|
|
}
|
|
|
|
static void read_mv(vp8_reader *r, MV *mv, const MV_CONTEXT *mvc)
|
|
{
|
|
mv->row = (short)(read_mvcomponent(r, mvc) << 1);
|
|
mv->col = (short)(read_mvcomponent(r, ++mvc) << 1);
|
|
}
|
|
|
|
|
|
static void read_mvcontexts(vp8_reader *bc, MV_CONTEXT *mvc)
|
|
{
|
|
int i = 0;
|
|
|
|
do
|
|
{
|
|
const vp8_prob *up = vp8_mv_update_probs[i].prob;
|
|
vp8_prob *p = (vp8_prob *)(mvc + i);
|
|
vp8_prob *const pstop = p + MVPcount;
|
|
|
|
do
|
|
{
|
|
if (vp8_read(bc, *up++))
|
|
{
|
|
const vp8_prob x = (vp8_prob)vp8_read_literal(bc, 7);
|
|
|
|
*p = x ? x << 1 : 1;
|
|
}
|
|
}
|
|
while (++p < pstop);
|
|
}
|
|
while (++i < 2);
|
|
}
|
|
|
|
|
|
static MB_PREDICTION_MODE read_mv_ref(vp8_reader *bc, const vp8_prob *p)
|
|
{
|
|
const int i = vp8_treed_read(bc, vp8_mv_ref_tree, p);
|
|
|
|
return (MB_PREDICTION_MODE)i;
|
|
}
|
|
|
|
static MB_PREDICTION_MODE sub_mv_ref(vp8_reader *bc, const vp8_prob *p)
|
|
{
|
|
const int i = vp8_treed_read(bc, vp8_sub_mv_ref_tree, p);
|
|
|
|
return (MB_PREDICTION_MODE)i;
|
|
}
|
|
unsigned int vp8_mv_cont_count[5][4] =
|
|
{
|
|
{ 0, 0, 0, 0 },
|
|
{ 0, 0, 0, 0 },
|
|
{ 0, 0, 0, 0 },
|
|
{ 0, 0, 0, 0 },
|
|
{ 0, 0, 0, 0 }
|
|
};
|
|
|
|
void vp8_decode_mode_mvs(VP8D_COMP *pbi)
|
|
{
|
|
const MV Zero = { 0, 0};
|
|
|
|
VP8_COMMON *const pc = & pbi->common;
|
|
vp8_reader *const bc = & pbi->bc;
|
|
|
|
MODE_INFO *mi = pc->mi, *ms;
|
|
const int mis = pc->mode_info_stride;
|
|
|
|
MV_CONTEXT *const mvc = pc->fc.mvc;
|
|
|
|
int mb_row = -1;
|
|
|
|
vp8_prob prob_intra;
|
|
vp8_prob prob_last;
|
|
vp8_prob prob_gf;
|
|
vp8_prob prob_skip_false = 0;
|
|
|
|
if (pc->mb_no_coeff_skip)
|
|
prob_skip_false = (vp8_prob)vp8_read_literal(bc, 8);
|
|
|
|
prob_intra = (vp8_prob)vp8_read_literal(bc, 8);
|
|
prob_last = (vp8_prob)vp8_read_literal(bc, 8);
|
|
prob_gf = (vp8_prob)vp8_read_literal(bc, 8);
|
|
|
|
ms = pc->mi - 1;
|
|
|
|
if (vp8_read_bit(bc))
|
|
{
|
|
int i = 0;
|
|
|
|
do
|
|
{
|
|
pc->fc.ymode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
|
|
}
|
|
while (++i < 4);
|
|
}
|
|
|
|
if (vp8_read_bit(bc))
|
|
{
|
|
int i = 0;
|
|
|
|
do
|
|
{
|
|
pc->fc.uv_mode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
|
|
}
|
|
while (++i < 3);
|
|
}
|
|
|
|
read_mvcontexts(bc, mvc);
|
|
|
|
while (++mb_row < pc->mb_rows)
|
|
{
|
|
int mb_col = -1;
|
|
|
|
while (++mb_col < pc->mb_cols)
|
|
{
|
|
MB_MODE_INFO *const mbmi = & mi->mbmi;
|
|
MV *const mv = & mbmi->mv.as_mv;
|
|
VP8_COMMON *const pc = &pbi->common;
|
|
MACROBLOCKD *xd = &pbi->mb;
|
|
|
|
mbmi->need_to_clamp_mvs = 0;
|
|
// 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;
|
|
|
|
// If required read in new segmentation data for this MB
|
|
if (pbi->mb.update_mb_segmentation_map)
|
|
vp8_read_mb_features(bc, mbmi, &pbi->mb);
|
|
|
|
// Read the macroblock coeff skip flag if this feature is in use, else default to 0
|
|
if (pc->mb_no_coeff_skip)
|
|
mbmi->mb_skip_coeff = vp8_read(bc, prob_skip_false);
|
|
else
|
|
mbmi->mb_skip_coeff = 0;
|
|
|
|
mbmi->uv_mode = DC_PRED;
|
|
|
|
if ((mbmi->ref_frame = (MV_REFERENCE_FRAME) vp8_read(bc, prob_intra))) /* inter MB */
|
|
{
|
|
int rct[4];
|
|
vp8_prob mv_ref_p [VP8_MVREFS-1];
|
|
MV nearest, nearby, best_mv;
|
|
|
|
if (vp8_read(bc, prob_last))
|
|
{
|
|
mbmi->ref_frame = (MV_REFERENCE_FRAME)((int)mbmi->ref_frame + (int)(1 + vp8_read(bc, prob_gf)));
|
|
}
|
|
|
|
vp8_find_near_mvs(xd, mi, &nearest, &nearby, &best_mv, rct, mbmi->ref_frame, pbi->common.ref_frame_sign_bias);
|
|
|
|
vp8_mv_ref_probs(mv_ref_p, rct);
|
|
|
|
switch (mbmi->mode = read_mv_ref(bc, mv_ref_p))
|
|
{
|
|
case SPLITMV:
|
|
{
|
|
const int s = mbmi->partitioning = vp8_treed_read(
|
|
bc, vp8_mbsplit_tree, vp8_mbsplit_probs
|
|
);
|
|
const int num_p = vp8_mbsplit_count [s];
|
|
const int *const L = vp8_mbsplits [s];
|
|
int j = 0;
|
|
|
|
do /* for each subset j */
|
|
{
|
|
B_MODE_INFO *const bmi = mbmi->partition_bmi + j;
|
|
MV *const mv = & bmi->mv.as_mv;
|
|
|
|
int k = -1; /* first block in subset j */
|
|
int mv_contz;
|
|
|
|
while (j != L[++k])
|
|
{
|
|
#if CONFIG_DEBUG
|
|
if (k >= 16)
|
|
{
|
|
assert(0);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
mv_contz = vp8_mv_cont(&(vp8_left_bmi(mi, k)->mv.as_mv), &(vp8_above_bmi(mi, k, mis)->mv.as_mv));
|
|
|
|
switch (bmi->mode = (B_PREDICTION_MODE) sub_mv_ref(bc, vp8_sub_mv_ref_prob2 [mv_contz])) //pc->fc.sub_mv_ref_prob))
|
|
{
|
|
case NEW4X4:
|
|
read_mv(bc, mv, (const MV_CONTEXT *) mvc);
|
|
mv->row += best_mv.row;
|
|
mv->col += best_mv.col;
|
|
#ifdef VPX_MODE_COUNT
|
|
vp8_mv_cont_count[mv_contz][3]++;
|
|
#endif
|
|
break;
|
|
case LEFT4X4:
|
|
*mv = vp8_left_bmi(mi, k)->mv.as_mv;
|
|
#ifdef VPX_MODE_COUNT
|
|
vp8_mv_cont_count[mv_contz][0]++;
|
|
#endif
|
|
break;
|
|
case ABOVE4X4:
|
|
*mv = vp8_above_bmi(mi, k, mis)->mv.as_mv;
|
|
#ifdef VPX_MODE_COUNT
|
|
vp8_mv_cont_count[mv_contz][1]++;
|
|
#endif
|
|
break;
|
|
case ZERO4X4:
|
|
*mv = Zero;
|
|
#ifdef VPX_MODE_COUNT
|
|
vp8_mv_cont_count[mv_contz][2]++;
|
|
#endif
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (mv->col < xd->mb_to_left_edge
|
|
- LEFT_TOP_MARGIN
|
|
|| mv->col > xd->mb_to_right_edge
|
|
+ RIGHT_BOTTOM_MARGIN
|
|
|| mv->row < xd->mb_to_top_edge
|
|
- LEFT_TOP_MARGIN
|
|
|| mv->row > xd->mb_to_bottom_edge
|
|
+ RIGHT_BOTTOM_MARGIN
|
|
)
|
|
mbmi->need_to_clamp_mvs = 1;
|
|
|
|
/* Fill (uniform) modes, mvs of jth subset.
|
|
Must do it here because ensuing subsets can
|
|
refer back to us via "left" or "above". */
|
|
do
|
|
if (j == L[k])
|
|
mi->bmi[k] = *bmi;
|
|
|
|
while (++k < 16);
|
|
}
|
|
while (++j < num_p);
|
|
}
|
|
|
|
*mv = mi->bmi[15].mv.as_mv;
|
|
|
|
break; /* done with SPLITMV */
|
|
|
|
case NEARMV:
|
|
*mv = nearby;
|
|
|
|
// Clip "next_nearest" so that it does not extend to far out of image
|
|
if (mv->col < (xd->mb_to_left_edge - LEFT_TOP_MARGIN))
|
|
mv->col = xd->mb_to_left_edge - LEFT_TOP_MARGIN;
|
|
else if (mv->col > xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN)
|
|
mv->col = xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN;
|
|
|
|
if (mv->row < (xd->mb_to_top_edge - LEFT_TOP_MARGIN))
|
|
mv->row = xd->mb_to_top_edge - LEFT_TOP_MARGIN;
|
|
else if (mv->row > xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN)
|
|
mv->row = xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN;
|
|
|
|
goto propagate_mv;
|
|
|
|
case NEARESTMV:
|
|
*mv = nearest;
|
|
|
|
// Clip "next_nearest" so that it does not extend to far out of image
|
|
if (mv->col < (xd->mb_to_left_edge - LEFT_TOP_MARGIN))
|
|
mv->col = xd->mb_to_left_edge - LEFT_TOP_MARGIN;
|
|
else if (mv->col > xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN)
|
|
mv->col = xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN;
|
|
|
|
if (mv->row < (xd->mb_to_top_edge - LEFT_TOP_MARGIN))
|
|
mv->row = xd->mb_to_top_edge - LEFT_TOP_MARGIN;
|
|
else if (mv->row > xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN)
|
|
mv->row = xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN;
|
|
|
|
goto propagate_mv;
|
|
|
|
case ZEROMV:
|
|
*mv = Zero;
|
|
goto propagate_mv;
|
|
|
|
case NEWMV:
|
|
read_mv(bc, mv, (const MV_CONTEXT *) mvc);
|
|
mv->row += best_mv.row;
|
|
mv->col += best_mv.col;
|
|
|
|
/* Don't need to check this on NEARMV and NEARESTMV modes
|
|
* since those modes clamp the MV. The NEWMV mode does not,
|
|
* so signal to the prediction stage whether special
|
|
* handling may be required.
|
|
*/
|
|
if (mv->col < xd->mb_to_left_edge - LEFT_TOP_MARGIN
|
|
|| mv->col > xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN
|
|
|| mv->row < xd->mb_to_top_edge - LEFT_TOP_MARGIN
|
|
|| mv->row > xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN
|
|
)
|
|
mbmi->need_to_clamp_mvs = 1;
|
|
|
|
propagate_mv: /* same MV throughout */
|
|
{
|
|
//int i=0;
|
|
//do
|
|
//{
|
|
// mi->bmi[i].mv.as_mv = *mv;
|
|
//}
|
|
//while( ++i < 16);
|
|
|
|
mi->bmi[0].mv.as_mv = *mv;
|
|
mi->bmi[1].mv.as_mv = *mv;
|
|
mi->bmi[2].mv.as_mv = *mv;
|
|
mi->bmi[3].mv.as_mv = *mv;
|
|
mi->bmi[4].mv.as_mv = *mv;
|
|
mi->bmi[5].mv.as_mv = *mv;
|
|
mi->bmi[6].mv.as_mv = *mv;
|
|
mi->bmi[7].mv.as_mv = *mv;
|
|
mi->bmi[8].mv.as_mv = *mv;
|
|
mi->bmi[9].mv.as_mv = *mv;
|
|
mi->bmi[10].mv.as_mv = *mv;
|
|
mi->bmi[11].mv.as_mv = *mv;
|
|
mi->bmi[12].mv.as_mv = *mv;
|
|
mi->bmi[13].mv.as_mv = *mv;
|
|
mi->bmi[14].mv.as_mv = *mv;
|
|
mi->bmi[15].mv.as_mv = *mv;
|
|
}
|
|
|
|
break;
|
|
|
|
default:;
|
|
#if CONFIG_DEBUG
|
|
assert(0);
|
|
#endif
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* MB is intra coded */
|
|
|
|
int j = 0;
|
|
|
|
do
|
|
{
|
|
mi->bmi[j].mv.as_mv = Zero;
|
|
}
|
|
while (++j < 16);
|
|
|
|
*mv = Zero;
|
|
|
|
if ((mbmi->mode = (MB_PREDICTION_MODE) vp8_read_ymode(bc, pc->fc.ymode_prob)) == B_PRED)
|
|
{
|
|
int j = 0;
|
|
|
|
do
|
|
{
|
|
mi->bmi[j].mode = (B_PREDICTION_MODE)vp8_read_bmode(bc, pc->fc.bmode_prob);
|
|
}
|
|
while (++j < 16);
|
|
}
|
|
|
|
mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, pc->fc.uv_mode_prob);
|
|
}
|
|
|
|
mi++; // next macroblock
|
|
}
|
|
|
|
mi++; // skip left predictor each row
|
|
}
|
|
}
|