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
|
/*
* 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 "blockd.h"
typedef enum
{
PRED = 0,
DEST = 1
} BLOCKSET;
static void setup_block
(
BLOCKD *b,
int mv_stride,
unsigned char **base,
int Stride,
int offset,
BLOCKSET bs
)
{
if (bs == DEST)
{
b->dst_stride = Stride;
b->dst = offset;
b->base_dst = base;
}
else
{
b->pre_stride = Stride;
b->pre = offset;
b->base_pre = base;
}
}
static void setup_macroblock(MACROBLOCKD *x, BLOCKSET bs)
{
int block;
unsigned char **y, **u, **v;
if (bs == DEST)
{
y = &x->dst.y_buffer;
u = &x->dst.u_buffer;
v = &x->dst.v_buffer;
}
else
{
y = &x->pre.y_buffer;
u = &x->pre.u_buffer;
v = &x->pre.v_buffer;
}
for (block = 0; block < 16; block++) /* y blocks */
{
setup_block(&x->block[block], x->dst.y_stride, y, x->dst.y_stride,
(block >> 2) * 4 * x->dst.y_stride + (block & 3) * 4, bs);
}
for (block = 16; block < 20; block++) /* U and V blocks */
{
setup_block(&x->block[block], x->dst.uv_stride, u, x->dst.uv_stride,
((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4, bs);
setup_block(&x->block[block+4], x->dst.uv_stride, v, x->dst.uv_stride,
((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4, bs);
}
}
void vp8_setup_block_dptrs(MACROBLOCKD *x)
{
int r, c;
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
x->block[r*4+c].diff = &x->diff[r * 4 * 16 + c * 4];
x->block[r*4+c].predictor = x->predictor + r * 4 * 16 + c * 4;
}
}
for (r = 0; r < 2; r++)
{
for (c = 0; c < 2; c++)
{
x->block[16+r*2+c].diff = &x->diff[256 + r * 4 * 8 + c * 4];
x->block[16+r*2+c].predictor = x->predictor + 256 + r * 4 * 8 + c * 4;
}
}
for (r = 0; r < 2; r++)
{
for (c = 0; c < 2; c++)
{
x->block[20+r*2+c].diff = &x->diff[320+ r * 4 * 8 + c * 4];
x->block[20+r*2+c].predictor = x->predictor + 320 + r * 4 * 8 + c * 4;
}
}
x->block[24].diff = &x->diff[384];
for (r = 0; r < 25; r++)
{
x->block[r].qcoeff = x->qcoeff + r * 16;
x->block[r].dqcoeff = x->dqcoeff + r * 16;
}
}
void vp8_build_block_doffsets(MACROBLOCKD *x)
{
/* handle the destination pitch features */
setup_macroblock(x, DEST);
setup_macroblock(x, PRED);
}
|
