1 /*
2 * Copyright (c) 2017-2019 Arm Limited.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24 #include "WarpAffine.h"
25
26 #include "Utils.h"
27
28 namespace arm_compute
29 {
30 namespace test
31 {
32 namespace validation
33 {
34 namespace reference
35 {
valid_bilinear_policy(float xn,float yn,int width,int height,BorderMode border_mode)36 bool valid_bilinear_policy(float xn, float yn, int width, int height, BorderMode border_mode)
37 {
38 if(border_mode != BorderMode::UNDEFINED)
39 {
40 return true;
41 }
42 if((0 <= yn + 1) && (yn + 1 < height) && (0 <= xn + 1) && (xn + 1 < width))
43 {
44 return true;
45 }
46 return false;
47 }
48
49 template <typename T>
warp_affine(const SimpleTensor<T> & src,SimpleTensor<T> & valid_mask,const float * matrix,InterpolationPolicy policy,BorderMode border_mode,uint8_t constant_border_value)50 SimpleTensor<T> warp_affine(const SimpleTensor<T> &src, SimpleTensor<T> &valid_mask, const float *matrix, InterpolationPolicy policy, BorderMode border_mode, uint8_t constant_border_value)
51 {
52 SimpleTensor<T> dst(src.shape(), src.data_type());
53
54 // x0 = M00 * x + M01 * y + M02
55 // y0 = M10 * x + M11 * y + M12
56 const float M00 = matrix[0];
57 const float M10 = matrix[1];
58 const float M01 = matrix[0 + 1 * 2];
59 const float M11 = matrix[1 + 1 * 2];
60 const float M02 = matrix[0 + 2 * 2];
61 const float M12 = matrix[1 + 2 * 2];
62
63 const int width = src.shape().x();
64 const int height = src.shape().y();
65
66 const uint32_t num_elements = src.num_elements();
67 for(uint32_t element_idx = 0; element_idx < num_elements; ++element_idx)
68 {
69 valid_mask[element_idx] = 1;
70 Coordinates id = index2coord(src.shape(), element_idx);
71 int idx = id.x();
72 int idy = id.y();
73
74 float x0 = M00 * idx + M01 * idy + M02;
75 float y0 = M10 * idx + M11 * idy + M12;
76
77 id.set(0, static_cast<int>(std::floor(x0)));
78 id.set(1, static_cast<int>(std::floor(y0)));
79 if((0 <= y0) && (y0 < height) && (0 <= x0) && (x0 < width))
80 {
81 switch(policy)
82 {
83 case InterpolationPolicy::NEAREST_NEIGHBOR:
84 dst[element_idx] = tensor_elem_at(src, id, border_mode, constant_border_value);
85 break;
86 case InterpolationPolicy::BILINEAR:
87 (valid_bilinear_policy(x0, y0, width, height, border_mode)) ? dst[element_idx] = bilinear_policy(src, id, x0, y0, border_mode, constant_border_value) :
88 valid_mask[element_idx] = 0;
89 break;
90 case InterpolationPolicy::AREA:
91 default:
92 ARM_COMPUTE_ERROR("Interpolation not supported");
93 }
94 }
95 else
96 {
97 if(border_mode == BorderMode::UNDEFINED)
98 {
99 valid_mask[element_idx] = 0;
100 }
101 else
102 {
103 switch(policy)
104 {
105 case InterpolationPolicy::NEAREST_NEIGHBOR:
106 if(border_mode == BorderMode::CONSTANT)
107 {
108 dst[element_idx] = constant_border_value;
109 }
110 else if(border_mode == BorderMode::REPLICATE)
111 {
112 id.set(0, std::max(0, std::min(static_cast<int>(x0), width - 1)));
113 id.set(1, std::max(0, std::min(static_cast<int>(y0), height - 1)));
114 dst[element_idx] = src[coord2index(src.shape(), id)];
115 }
116 break;
117 case InterpolationPolicy::BILINEAR:
118 dst[element_idx] = bilinear_policy(src, id, x0, y0, border_mode, constant_border_value);
119 break;
120 case InterpolationPolicy::AREA:
121 default:
122 ARM_COMPUTE_ERROR("Interpolation not supported");
123 }
124 }
125 }
126 }
127
128 return dst;
129 }
130
131 template SimpleTensor<uint8_t> warp_affine(const SimpleTensor<uint8_t> &src, SimpleTensor<uint8_t> &valid_mask, const float *matrix, InterpolationPolicy policy, BorderMode border_mode,
132 uint8_t constant_border_value);
133 } // namespace reference
134 } // namespace validation
135 } // namespace test
136 } // namespace arm_compute