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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* Simd Library (http://ermig1979.github.io/Simd).
*
* Copyright (c) 2011-2019 Yermalayeu Ihar.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "Simd/SimdMemory.h"
#include "Simd/SimdStore.h"
namespace Simd
{
#ifdef SIMD_NEON_ENABLE
namespace Neon
{
SIMD_INLINE uint8x8_t Average(const uint8x16_t & s0, const uint8x16_t & s1)
{
return vshrn_n_u16(vaddq_u16(vaddq_u16(vpaddlq_u8(s0), vpaddlq_u8(s1)), vdupq_n_u16(2)), 2);
}
SIMD_INLINE uint8x16_t Average(const uint8x16_t & s00, const uint8x16_t & s01, const uint8x16_t & s10, const uint8x16_t & s11)
{
return vcombine_u8(Average(s00, s10), Average(s01, s11));
}
template <size_t channelCount> struct Color2x2
{
template <bool align> static SIMD_INLINE void Reduce(const uint8_t * src0, const uint8_t * src1, uint8_t * dst)
{
assert(0);
}
};
template<> struct Color2x2<1>
{
template <bool align> static SIMD_INLINE void Reduce(const uint8_t * src0, const uint8_t * src1, uint8_t * dst)
{
Store<align>(dst, Average(Load<align>(src0 + 0), Load<align>(src0 + A), Load<align>(src1 + 0), Load<align>(src1 + A)));
}
};
template<> struct Color2x2<2>
{
template <bool align> static SIMD_INLINE void Reduce(const uint8_t * src0, const uint8_t * src1, uint8_t * dst)
{
uint8x16x2_t s00 = Load2<align>(src0 + 0 * A);
uint8x16x2_t s01 = Load2<align>(src0 + 2 * A);
uint8x16x2_t s10 = Load2<align>(src1 + 0 * A);
uint8x16x2_t s11 = Load2<align>(src1 + 2 * A);
uint8x16x2_t d;
d.val[0] = Average(s00.val[0], s01.val[0], s10.val[0], s11.val[0]);
d.val[1] = Average(s00.val[1], s01.val[1], s10.val[1], s11.val[1]);
Store2<align>(dst, d);
}
};
template<> struct Color2x2<3>
{
template <bool align> static SIMD_INLINE void Reduce(const uint8_t * src0, const uint8_t * src1, uint8_t * dst)
{
uint8x16x3_t s0, s1;
uint8x8x3_t d;
s0 = Load3<align>(src0);
s1 = Load3<align>(src1);
d.val[0] = Average(s0.val[0], s1.val[0]);
d.val[1] = Average(s0.val[1], s1.val[1]);
d.val[2] = Average(s0.val[2], s1.val[2]);
Store3<align>(dst, d);
s0 = Load3<align>(src0 + 3*A);
s1 = Load3<align>(src1 + 3*A);
d.val[0] = Average(s0.val[0], s1.val[0]);
d.val[1] = Average(s0.val[1], s1.val[1]);
d.val[2] = Average(s0.val[2], s1.val[2]);
Store3<align>(dst + 3*HA, d);
}
};
template<> struct Color2x2<4>
{
template <bool align> static SIMD_INLINE void Reduce(const uint8_t * src0, const uint8_t * src1, uint8_t * dst)
{
uint8x16x4_t s0, s1;
uint8x8x4_t d;
s0 = Load4<align>(src0);
s1 = Load4<align>(src1);
d.val[0] = Average(s0.val[0], s1.val[0]);
d.val[1] = Average(s0.val[1], s1.val[1]);
d.val[2] = Average(s0.val[2], s1.val[2]);
d.val[3] = Average(s0.val[3], s1.val[3]);
Store4<align>(dst, d);
s0 = Load4<align>(src0 + 4 * A);
s1 = Load4<align>(src1 + 4 * A);
d.val[0] = Average(s0.val[0], s1.val[0]);
d.val[1] = Average(s0.val[1], s1.val[1]);
d.val[2] = Average(s0.val[2], s1.val[2]);
d.val[3] = Average(s0.val[3], s1.val[3]);
Store4<align>(dst + 4 * HA, d);
}
};
template <size_t channelCount, bool align> void ReduceColor2x2(const uint8_t * src, size_t srcWidth, size_t srcHeight, size_t srcStride, uint8_t * dst, size_t dstStride)
{
size_t evenWidth = AlignLo(srcWidth, 2);
size_t alignedWidth = AlignLo(srcWidth, A);
size_t evenSize = evenWidth * channelCount;
size_t alignedSize = alignedWidth * channelCount;
size_t srcStep = DA * channelCount, dstStep = A * channelCount;
for (size_t srcRow = 0; srcRow < srcHeight; srcRow += 2)
{
const uint8_t *src0 = src;
const uint8_t *src1 = (srcRow == srcHeight - 1 ? src : src + srcStride);
size_t srcOffset = 0, dstOffset = 0;
for (; srcOffset < alignedSize; srcOffset += srcStep, dstOffset += dstStep)
Color2x2<channelCount>::template Reduce<align>(src0 + srcOffset, src1 + srcOffset, dst + dstOffset);
if (alignedSize != evenSize)
{
srcOffset = evenSize - srcStep;
dstOffset = srcOffset / 2;
Color2x2<channelCount>::template Reduce<false>(src0 + srcOffset, src1 + srcOffset, dst + dstOffset);
}
if (evenWidth != srcWidth)
{
for (size_t c = 0; c < channelCount; ++c)
dst[evenSize / 2 + c] = Base::Average(src0[evenSize + c], src1[evenSize + c]);
}
src += 2 * srcStride;
dst += dstStride;
}
}
template <bool align> void ReduceColor2x2(const uint8_t * src, size_t srcWidth, size_t srcHeight, size_t srcStride,
uint8_t * dst, size_t dstWidth, size_t dstHeight, size_t dstStride, size_t channelCount)
{
assert((srcWidth + 1) / 2 == dstWidth && (srcHeight + 1) / 2 == dstHeight && srcWidth >= DA);
if (align)
{
assert(Aligned(src) && Aligned(srcStride));
assert(Aligned(dst) && Aligned(dstStride));
}
switch (channelCount)
{
case 1: ReduceColor2x2<1, align>(src, srcWidth, srcHeight, srcStride, dst, dstStride); break;
case 2: ReduceColor2x2<2, align>(src, srcWidth, srcHeight, srcStride, dst, dstStride); break;
case 3: ReduceColor2x2<3, align>(src, srcWidth, srcHeight, srcStride, dst, dstStride); break;
case 4: ReduceColor2x2<4, align>(src, srcWidth, srcHeight, srcStride, dst, dstStride); break;
default: assert(0);
}
}
void ReduceColor2x2(const uint8_t * src, size_t srcWidth, size_t srcHeight, size_t srcStride,
uint8_t * dst, size_t dstWidth, size_t dstHeight, size_t dstStride, size_t channelCount)
{
if (Aligned(src) && Aligned(srcStride) && Aligned(dst) && Aligned(dstStride))
ReduceColor2x2<true>(src, srcWidth, srcHeight, srcStride, dst, dstWidth, dstHeight, dstStride, channelCount);
else
ReduceColor2x2<false>(src, srcWidth, srcHeight, srcStride, dst, dstWidth, dstHeight, dstStride, channelCount);
}
}
#endif// SIMD_NEON_ENABLE
}
|
