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
|
/*
* 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 <math.h>
#include "vpx_ports/config.h"
void vp8_short_fdct4x4_c(short *input, short *output, int pitch)
{
int i;
int a1, b1, c1, d1;
short *ip = input;
short *op = output;
for (i = 0; i < 4; i++)
{
#if CONFIG_EXTEND_QRANGE
a1 = ((ip[0] + ip[3])<<5);
b1 = ((ip[1] + ip[2])<<5);
c1 = ((ip[1] - ip[2])<<5);
d1 = ((ip[0] - ip[3])<<5);
#else
a1 = ((ip[0] + ip[3])<<3);
b1 = ((ip[1] + ip[2])<<3);
c1 = ((ip[1] - ip[2])<<3);
d1 = ((ip[0] - ip[3])<<3);
#endif
op[0] = a1 + b1;
op[2] = a1 - b1;
op[1] = (c1 * 2217 + d1 * 5352 + 14500)>>12;
op[3] = (d1 * 2217 - c1 * 5352 + 7500)>>12;
ip += pitch / 2;
op += 4;
}
ip = output;
op = output;
for (i = 0; i < 4; i++)
{
a1 = ip[0] + ip[12];
b1 = ip[4] + ip[8];
c1 = ip[4] - ip[8];
d1 = ip[0] - ip[12];
op[0] = ( a1 + b1 + 7)>>4;
op[8] = ( a1 - b1 + 7)>>4;
op[4] =((c1 * 2217 + d1 * 5352 + 12000)>>16) + (d1!=0);
op[12] = (d1 * 2217 - c1 * 5352 + 51000)>>16;
ip++;
op++;
}
}
void vp8_short_fdct8x4_c(short *input, short *output, int pitch)
{
vp8_short_fdct4x4_c(input, output, pitch);
vp8_short_fdct4x4_c(input + 4, output + 16, pitch);
}
void vp8_short_walsh4x4_c(short *input, short *output, int pitch)
{
int i;
int a1, b1, c1, d1;
int a2, b2, c2, d2;
short *ip = input;
short *op = output;
for (i = 0; i < 4; i++)
{
#if !CONFIG_EXTEND_QRANGE
a1 = ((ip[0] + ip[2])<<2);
d1 = ((ip[1] + ip[3])<<2);
c1 = ((ip[1] - ip[3])<<2);
b1 = ((ip[0] - ip[2])<<2);
op[0] = a1 + d1 + (a1!=0);
#else
a1 = ((ip[0] + ip[2]));
d1 = ((ip[1] + ip[3]));
c1 = ((ip[1] - ip[3]));
b1 = ((ip[0] - ip[2]));
op[0] = a1 + d1;
#endif
op[1] = b1 + c1;
op[2] = b1 - c1;
op[3] = a1 - d1;
ip += pitch / 2;
op += 4;
}
ip = output;
op = output;
for (i = 0; i < 4; i++)
{
a1 = ip[0] + ip[8];
d1 = ip[4] + ip[12];
c1 = ip[4] - ip[12];
b1 = ip[0] - ip[8];
a2 = a1 + d1;
b2 = b1 + c1;
c2 = b1 - c1;
d2 = a1 - d1;
a2 += a2<0;
b2 += b2<0;
c2 += c2<0;
d2 += d2<0;
#if !CONFIG_EXTEND_QRANGE
op[0] = (a2+3) >> 3;
op[4] = (b2+3) >> 3;
op[8] = (c2+3) >> 3;
op[12]= (d2+3) >> 3;
#else
op[0] = (a2+1) >> 2;
op[4] = (b2+1) >> 2;
op[8] = (c2+1) >> 2;
op[12]= (d2+1) >> 2;
#endif
ip++;
op++;
}
}
|
