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
|
/*
* 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 "dequantize.h"
#include "idct.h"
void vp8_dequant_b_c(BLOCKD *d)
{
int i;
short *DQ = d->dqcoeff;
short *Q = d->qcoeff;
short *DQC = d->dequant;
for (i = 0; i < 16; i++)
{
DQ[i] = Q[i] * DQC[i];
}
}
void vp8_dequant_idct_add_c(short *input, short *dq, unsigned char *pred,
unsigned char *dest, int pitch, int stride)
{
short output[16];
short *diff_ptr = output;
int r, c;
int i;
for (i = 0; i < 16; i++)
{
input[i] = dq[i] * input[i];
}
/* the idct halves ( >> 1) the pitch */
vp8_short_idct4x4llm_c(input, output, 4 << 1);
memset(input, 0, 32);
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
int a = diff_ptr[c] + pred[c];
if (a < 0)
a = 0;
if (a > 255)
a = 255;
dest[c] = (unsigned char) a;
}
dest += stride;
diff_ptr += 4;
pred += pitch;
}
}
void vp8_dequant_dc_idct_add_c(short *input, short *dq, unsigned char *pred,
unsigned char *dest, int pitch, int stride,
int dc)
{
int i;
short output[16];
short *diff_ptr = output;
int r, c;
input[0] = (short)dc;
for (i = 1; i < 16; i++)
{
input[i] = dq[i] * input[i];
}
/* the idct halves ( >> 1) the pitch */
vp8_short_idct4x4llm_c(input, output, 4 << 1);
memset(input, 0, 32);
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
int a = diff_ptr[c] + pred[c];
if (a < 0)
a = 0;
if (a > 255)
a = 255;
dest[c] = (unsigned char) a;
}
dest += stride;
diff_ptr += 4;
pred += pitch;
}
}
|
