1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
* Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license and patent
* grant that can be found in the LICENSE file in the root of the source
* tree. All contributing project authors may be found in the AUTHORS
* file in the root of the source tree.
*/
#include "onyxd_int.h"
#include "entropymode.h"
#include "findnearmv.h"
int vp8_read_bmode(vp8_reader *bc, const vp8_prob *p)
{
const int i = vp8_treed_read(bc, vp8_bmode_tree, p);
return i;
}
int vp8_read_ymode(vp8_reader *bc, const vp8_prob *p)
{
const int i = vp8_treed_read(bc, vp8_ymode_tree, p);
return i;
}
int vp8_kfread_ymode(vp8_reader *bc, const vp8_prob *p)
{
const int i = vp8_treed_read(bc, vp8_kf_ymode_tree, p);
return i;
}
int vp8_read_uv_mode(vp8_reader *bc, const vp8_prob *p)
{
const int i = vp8_treed_read(bc, vp8_uv_mode_tree, p);
return i;
}
void vp8_read_mb_features(vp8_reader *r, MB_MODE_INFO *mi, MACROBLOCKD *x)
{
// Is segmentation enabled
if (x->segmentation_enabled && x->update_mb_segmentation_map)
{
// If so then read the segment id.
if (vp8_read(r, x->mb_segment_tree_probs[0]))
mi->segment_id = (unsigned char)(2 + vp8_read(r, x->mb_segment_tree_probs[2]));
else
mi->segment_id = (unsigned char)(vp8_read(r, x->mb_segment_tree_probs[1]));
}
}
void vp8_kfread_modes(VP8D_COMP *pbi)
{
VP8_COMMON *const cp = & pbi->common;
vp8_reader *const bc = & pbi->bc;
MODE_INFO *m = cp->mi;
const int ms = cp->mode_info_stride;
int mb_row = -1;
vp8_prob prob_skip_false = 0;
if (cp->mb_no_coeff_skip)
prob_skip_false = (vp8_prob)(vp8_read_literal(bc, 8));
while (++mb_row < cp->mb_rows)
{
int mb_col = -1;
while (++mb_col < cp->mb_cols)
{
MB_PREDICTION_MODE y_mode;
vp8dx_bool_decoder_fill(bc);
// Read the Macroblock segmentation map if it is being updated explicitly this frame (reset to 0 above by default)
// By default on a key frame reset all MBs to segment 0
m->mbmi.segment_id = 0;
if (pbi->mb.update_mb_segmentation_map)
vp8_read_mb_features(bc, &m->mbmi, &pbi->mb);
// Read the macroblock coeff skip flag if this feature is in use, else default to 0
if (cp->mb_no_coeff_skip)
m->mbmi.mb_skip_coeff = vp8_read(bc, prob_skip_false);
else
m->mbmi.mb_skip_coeff = 0;
y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc, cp->kf_ymode_prob);
m->mbmi.ref_frame = INTRA_FRAME;
if ((m->mbmi.mode = y_mode) == B_PRED)
{
int i = 0;
do
{
const B_PREDICTION_MODE A = vp8_above_bmi(m, i, ms)->mode;
const B_PREDICTION_MODE L = vp8_left_bmi(m, i)->mode;
m->bmi[i].mode = (B_PREDICTION_MODE) vp8_read_bmode(bc, cp->kf_bmode_prob [A] [L]);
}
while (++i < 16);
}
else
{
int BMode;
int i = 0;
switch (y_mode)
{
case DC_PRED:
BMode = B_DC_PRED;
break;
case V_PRED:
BMode = B_VE_PRED;
break;
case H_PRED:
BMode = B_HE_PRED;
break;
case TM_PRED:
BMode = B_TM_PRED;
break;
default:
BMode = B_DC_PRED;
break;
}
do
{
m->bmi[i].mode = (B_PREDICTION_MODE)BMode;
}
while (++i < 16);
}
(m++)->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, cp->kf_uv_mode_prob);
}
m++; // skip the border
}
}
|
