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
|
/*
* Copyright 2015 The LibYuv 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 <string.h> // For memset/memcpy
#include "libyuv/scale.h"
#include "libyuv/scale_row.h"
#include "libyuv/basic_types.h"
// Scale up horizontally 2 times using linear filter.
#define SUH2LANY(NAME, SIMD, C, MASK, PTYPE) \
void NAME(const PTYPE* src_ptr, PTYPE* dst_ptr, int dst_width) { \
int work_width = (dst_width - 1) & ~1; \
int r = work_width & MASK; \
int n = work_width & ~MASK; \
dst_ptr[0] = src_ptr[0]; \
if (work_width > 0) { \
if (n != 0) { \
SIMD(src_ptr, dst_ptr + 1, n); \
} \
C(src_ptr + (n / 2), dst_ptr + n + 1, r); \
} \
dst_ptr[dst_width - 1] = src_ptr[(dst_width - 1) / 2]; \
}
// Even the C versions need to be wrapped, because boundary pixels have to
// be handled differently
SUH2LANY(ScaleRowUp2_Linear_Any_C,
ScaleRowUp2_Linear_C,
ScaleRowUp2_Linear_C,
0,
uint8_t)
SUH2LANY(ScaleRowUp2_Linear_16_Any_C,
ScaleRowUp2_Linear_16_C,
ScaleRowUp2_Linear_16_C,
0,
uint16_t)
// Scale up 2 times using bilinear filter.
// This function produces 2 rows at a time.
#define SU2BLANY(NAME, SIMD, C, MASK, PTYPE) \
void NAME(const PTYPE* src_ptr, ptrdiff_t src_stride, PTYPE* dst_ptr, \
ptrdiff_t dst_stride, int dst_width) { \
int work_width = (dst_width - 1) & ~1; \
int r = work_width & MASK; \
int n = work_width & ~MASK; \
const PTYPE* sa = src_ptr; \
const PTYPE* sb = src_ptr + src_stride; \
PTYPE* da = dst_ptr; \
PTYPE* db = dst_ptr + dst_stride; \
da[0] = (3 * sa[0] + sb[0] + 2) >> 2; \
db[0] = (sa[0] + 3 * sb[0] + 2) >> 2; \
if (work_width > 0) { \
if (n != 0) { \
SIMD(sa, sb - sa, da + 1, db - da, n); \
} \
C(sa + (n / 2), sb - sa, da + n + 1, db - da, r); \
} \
da[dst_width - 1] = \
(3 * sa[(dst_width - 1) / 2] + sb[(dst_width - 1) / 2] + 2) >> 2; \
db[dst_width - 1] = \
(sa[(dst_width - 1) / 2] + 3 * sb[(dst_width - 1) / 2] + 2) >> 2; \
}
SU2BLANY(ScaleRowUp2_Bilinear_Any_C,
ScaleRowUp2_Bilinear_C,
ScaleRowUp2_Bilinear_C,
0,
uint8_t)
SU2BLANY(ScaleRowUp2_Bilinear_16_Any_C,
ScaleRowUp2_Bilinear_16_C,
ScaleRowUp2_Bilinear_16_C,
0,
uint16_t)
|
