Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
Sang-Hoon Park | 68dd25f | 2020-10-19 16:00:11 +0100 | [diff] [blame] | 2 | * Copyright (c) 2016-2020 Arm Limited. |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 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 "arm_compute/core/NEON/kernels/NEWarpKernel.h" |
| 25 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 26 | #include "arm_compute/core/Coordinates.h" |
| 27 | #include "arm_compute/core/Error.h" |
| 28 | #include "arm_compute/core/Helpers.h" |
| 29 | #include "arm_compute/core/ITensor.h" |
| 30 | #include "arm_compute/core/TensorInfo.h" |
| 31 | #include "arm_compute/core/Validate.h" |
| 32 | #include "arm_compute/core/Window.h" |
Sang-Hoon Park | 68dd25f | 2020-10-19 16:00:11 +0100 | [diff] [blame] | 33 | #include "src/core/AccessWindowStatic.h" |
| 34 | #include "src/core/helpers/AutoConfiguration.h" |
| 35 | #include "src/core/helpers/ScaleHelpers.h" |
| 36 | #include "src/core/helpers/WindowHelpers.h" |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 37 | |
| 38 | #include <cstddef> |
| 39 | |
| 40 | using namespace arm_compute; |
| 41 | |
| 42 | namespace |
| 43 | { |
| 44 | inline uint8_t nearest_interpolation(const uint8_t *in_ptr, int x, int y, size_t stride) |
| 45 | { |
| 46 | return in_ptr[x + y * stride]; |
| 47 | } |
| 48 | } // namespace |
| 49 | |
| 50 | INEWarpKernel::INEWarpKernel() |
Pablo Tello | d8b03dd | 2018-08-07 11:23:54 +0100 | [diff] [blame] | 51 | : _func(nullptr), _input(nullptr), _output(nullptr), _constant_border_value(0), _matrix() |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 52 | { |
| 53 | } |
| 54 | |
Isabella Gottardi | f9bae2e | 2017-07-28 17:24:08 +0100 | [diff] [blame] | 55 | BorderSize INEWarpKernel::border_size() const |
| 56 | { |
| 57 | return BorderSize(1); |
| 58 | } |
| 59 | |
Moritz Pflanzer | c186b57 | 2017-09-07 09:48:04 +0100 | [diff] [blame] | 60 | void INEWarpKernel::run(const Window &window, const ThreadInfo &info) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 61 | { |
Moritz Pflanzer | c186b57 | 2017-09-07 09:48:04 +0100 | [diff] [blame] | 62 | ARM_COMPUTE_UNUSED(info); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 63 | ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this); |
| 64 | ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INEKernel::window(), window); |
| 65 | ARM_COMPUTE_ERROR_ON(_func == nullptr); |
| 66 | |
| 67 | (this->*_func)(window); |
| 68 | } |
| 69 | |
Pablo Tello | d8b03dd | 2018-08-07 11:23:54 +0100 | [diff] [blame] | 70 | void INEWarpKernel::configure(const ITensor *input, ITensor *output, const std::array<float, 9> &matrix, BorderMode border_mode, uint8_t constant_border_value) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 71 | { |
| 72 | ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8); |
| 73 | ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U8); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 74 | |
| 75 | _matrix = matrix; |
| 76 | _constant_border_value = constant_border_value; |
| 77 | |
| 78 | switch(border_mode) |
| 79 | { |
| 80 | case BorderMode::UNDEFINED: |
| 81 | _func = &INEWarpKernel::warp_undefined; |
| 82 | break; |
| 83 | case BorderMode::CONSTANT: |
| 84 | _func = &INEWarpKernel::warp_constant; |
| 85 | break; |
| 86 | case BorderMode::REPLICATE: |
| 87 | _func = &INEWarpKernel::warp_replicate; |
| 88 | break; |
| 89 | default: |
| 90 | ARM_COMPUTE_ERROR("Border mode not supported"); |
| 91 | break; |
| 92 | } |
| 93 | |
| 94 | _input = input; |
| 95 | _output = output; |
| 96 | |
| 97 | // Configure kernel window |
| 98 | Window win = calculate_max_window(*output->info(), Steps(1U)); |
| 99 | |
| 100 | const ValidRegion &input_valid_region = input->info()->valid_region(); |
| 101 | |
| 102 | // Reads can occur within the valid region of the input |
| 103 | AccessWindowStatic input_access(input->info(), |
Isabella Gottardi | f9bae2e | 2017-07-28 17:24:08 +0100 | [diff] [blame] | 104 | input_valid_region.anchor[0] - border_size().left, input_valid_region.anchor[1] - border_size().top, |
| 105 | input_valid_region.anchor[0] + input_valid_region.shape[0] + border_size().right, |
| 106 | input_valid_region.anchor[1] + input_valid_region.shape[1] + border_size().bottom); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 107 | AccessWindowHorizontal output_access(output->info(), 0, 1); |
| 108 | |
| 109 | update_window_and_padding(win, input_access, output_access); |
| 110 | |
| 111 | output_access.set_valid_region(win, ValidRegion(Coordinates(), output->info()->tensor_shape())); |
| 112 | |
| 113 | INEKernel::configure(win); |
| 114 | } |
| 115 | |
| 116 | template <InterpolationPolicy interpolation> |
| 117 | void NEWarpAffineKernel<interpolation>::warp_undefined(const Window &window) |
| 118 | { |
| 119 | // Don't increment in X and Y direction for the input tensor |
| 120 | // A pointer to the start of this plane is needed as base for the precomputed offsets |
| 121 | Window win_in(window); |
| 122 | win_in.set(Window::DimX, Window::Dimension(0, 0, 0)); |
| 123 | win_in.set(Window::DimY, Window::Dimension(0, 0, 0)); |
| 124 | |
| 125 | Iterator in(_input, win_in); |
| 126 | Iterator out(_output, window); |
| 127 | |
| 128 | const int min_x = _input->info()->valid_region().anchor[0]; |
| 129 | const int max_x = min_x + _input->info()->valid_region().shape[0]; |
| 130 | const int min_y = _input->info()->valid_region().anchor[1]; |
| 131 | const int max_y = min_y + _input->info()->valid_region().shape[1]; |
| 132 | const size_t stride = _input->info()->strides_in_bytes()[1]; |
| 133 | |
| 134 | // x0 = M01 * x + M01 * y + M02 |
| 135 | // y0 = M11 * x + M11 * y + M12 |
| 136 | const float M00 = _matrix[0]; |
| 137 | const float M10 = _matrix[1]; |
| 138 | const float M01 = _matrix[0 + 1 * 2]; |
| 139 | const float M11 = _matrix[1 + 1 * 2]; |
| 140 | const float M02 = _matrix[0 + 2 * 2]; |
| 141 | const float M12 = _matrix[1 + 2 * 2]; |
| 142 | |
| 143 | // "M00 * x" and "M10 * x", when x = window.x.start |
| 144 | const float start_x0 = M00 * window.x().start(); |
| 145 | const float start_y0 = M10 * window.x().start(); |
| 146 | |
| 147 | // Current row |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 148 | int y_cur = window.y().start(); |
| 149 | int z_cur = window.z().start(); |
| 150 | int d3_cur = window[3].start(); |
| 151 | int d4_cur = window[4].start(); |
| 152 | int d5_cur = window[5].start(); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 153 | |
| 154 | // const_x0 and const_y0 are the constant parts of x0 and y0 during the row processing |
| 155 | float const_x0 = M01 * y_cur + M02; |
| 156 | float const_y0 = M11 * y_cur + M12; |
| 157 | |
| 158 | // Affine warp coordinates |
| 159 | float x0 = start_x0 + const_x0; |
| 160 | float y0 = start_y0 + const_y0; |
| 161 | |
| 162 | execute_window_loop(window, [&](const Coordinates & id) |
| 163 | { |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 164 | // Check if we are processing a new row. If so, update the current processed row (y_cur), x0, y0 and z0 |
| 165 | if((y_cur != id.y()) || (z_cur != id.z()) || (d3_cur != id[3]) || (d4_cur != id[4]) || (d5_cur != id[5])) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 166 | { |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 167 | y_cur = id.y(); |
| 168 | z_cur = id.z(); |
| 169 | d3_cur = id[3]; |
| 170 | d4_cur = id[4]; |
| 171 | d5_cur = id[5]; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 172 | |
| 173 | const_x0 = M01 * y_cur + M02; |
| 174 | const_y0 = M11 * y_cur + M12; |
| 175 | |
| 176 | x0 = start_x0 + const_x0; |
| 177 | y0 = start_y0 + const_y0; |
| 178 | } |
| 179 | |
| 180 | // Only write to output if x0 and y0 are within the valid region. |
| 181 | // Otherwise the read value would be undefined. |
| 182 | if((min_y <= y0) && (y0 < max_y) && (min_x <= x0) && (x0 < max_x)) |
| 183 | { |
| 184 | switch(interpolation) |
| 185 | { |
| 186 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 187 | *out.ptr() = nearest_interpolation(in.ptr(), x0, y0, stride); |
| 188 | break; |
| 189 | case InterpolationPolicy::BILINEAR: |
Sang-Hoon Park | 68dd25f | 2020-10-19 16:00:11 +0100 | [diff] [blame] | 190 | *out.ptr() = scale_helpers::pixel_bilinear_c1(in.ptr(), stride, x0, y0); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 191 | break; |
| 192 | default: |
| 193 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | x0 += M00; |
| 198 | y0 += M10; |
| 199 | }, |
| 200 | in, out); |
| 201 | } |
| 202 | |
| 203 | template <InterpolationPolicy interpolation> |
| 204 | void NEWarpAffineKernel<interpolation>::warp_constant(const Window &window) |
| 205 | { |
| 206 | // Don't increment in X and Y direction for the input tensor |
| 207 | // A pointer to the start of this plane is needed as base for the precomputed offsets |
| 208 | Window win_in(window); |
| 209 | win_in.set(Window::DimX, Window::Dimension(0, 0, 0)); |
| 210 | win_in.set(Window::DimY, Window::Dimension(0, 0, 0)); |
| 211 | |
| 212 | Iterator in(_input, win_in); |
| 213 | Iterator out(_output, window); |
| 214 | |
| 215 | const int min_x = _input->info()->valid_region().anchor[0]; |
| 216 | const int max_x = min_x + _input->info()->valid_region().shape[0]; |
| 217 | const int min_y = _input->info()->valid_region().anchor[1]; |
| 218 | const int max_y = min_y + _input->info()->valid_region().shape[1]; |
| 219 | const size_t stride = _input->info()->strides_in_bytes()[1]; |
| 220 | |
| 221 | // x0 = M01 * x + M01 * y + M02 |
| 222 | // y0 = M11 * x + M11 * y + M12 |
| 223 | const float M00 = _matrix[0]; |
| 224 | const float M10 = _matrix[1]; |
| 225 | const float M01 = _matrix[0 + 1 * 2]; |
| 226 | const float M11 = _matrix[1 + 1 * 2]; |
| 227 | const float M02 = _matrix[0 + 2 * 2]; |
| 228 | const float M12 = _matrix[1 + 2 * 2]; |
| 229 | |
| 230 | // "M00 * x" and "M10 * x", when x = window.x.start |
| 231 | const float start_x0 = M00 * window.x().start(); |
| 232 | const float start_y0 = M10 * window.x().start(); |
| 233 | |
| 234 | // Current row |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 235 | int y_cur = window.y().start(); |
| 236 | int z_cur = window.z().start(); |
| 237 | int d3_cur = window[3].start(); |
| 238 | int d4_cur = window[4].start(); |
| 239 | int d5_cur = window[5].start(); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 240 | |
| 241 | // const_x0 and const_y0 are the constant parts of x0 and y0 during the row processing |
| 242 | float const_x0 = M01 * y_cur + M02; |
| 243 | float const_y0 = M11 * y_cur + M12; |
| 244 | |
| 245 | // Affine warp coordinates |
| 246 | float x0 = start_x0 + const_x0; |
| 247 | float y0 = start_y0 + const_y0; |
| 248 | |
| 249 | execute_window_loop(window, [&](const Coordinates & id) |
| 250 | { |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 251 | // Check if we are processing a new row. If so, update the current processed row (y_cur), x0, y0 and z0 |
| 252 | if((y_cur != id.y()) || (z_cur != id.z()) || (d3_cur != id[3]) || (d4_cur != id[4]) || (d5_cur != id[5])) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 253 | { |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 254 | y_cur = id.y(); |
| 255 | z_cur = id.z(); |
| 256 | d3_cur = id[3]; |
| 257 | d4_cur = id[4]; |
| 258 | d5_cur = id[5]; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 259 | |
| 260 | const_x0 = M01 * y_cur + M02; |
| 261 | const_y0 = M11 * y_cur + M12; |
| 262 | |
| 263 | x0 = start_x0 + const_x0; |
| 264 | y0 = start_y0 + const_y0; |
| 265 | } |
| 266 | |
| 267 | // Only use input values if x0 and y0 are within the valid region. |
| 268 | // Otherwise write the constant border value. |
| 269 | if((min_y <= y0) && (y0 < max_y) && (min_x <= x0) && (x0 < max_x)) |
| 270 | { |
| 271 | switch(interpolation) |
| 272 | { |
| 273 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 274 | *out.ptr() = nearest_interpolation(in.ptr(), x0, y0, stride); |
| 275 | break; |
| 276 | case InterpolationPolicy::BILINEAR: |
Sang-Hoon Park | 68dd25f | 2020-10-19 16:00:11 +0100 | [diff] [blame] | 277 | *out.ptr() = scale_helpers::pixel_bilinear_c1(in.ptr(), stride, x0, y0); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 278 | break; |
| 279 | default: |
| 280 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 281 | } |
| 282 | } |
| 283 | else |
| 284 | { |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 285 | switch(interpolation) |
| 286 | { |
| 287 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 288 | *out.ptr() = _constant_border_value; |
| 289 | break; |
| 290 | case InterpolationPolicy::BILINEAR: |
| 291 | { |
Diego Lopez Recas | 490b3d8 | 2017-12-19 15:42:25 +0000 | [diff] [blame] | 292 | const auto xi = utility::clamp<int>(std::floor(x0), min_x - 1, max_x); |
| 293 | const auto yi = utility::clamp<int>(std::floor(y0), min_y - 1, max_y); |
| 294 | const auto xi_1 = utility::clamp<int>(std::floor(x0 + 1), min_x - 1, max_x); |
| 295 | const auto yi_1 = utility::clamp<int>(std::floor(y0 + 1), min_y - 1, max_y); |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 296 | |
| 297 | const float dx = x0 - std::floor(x0); |
| 298 | const float dy = y0 - std::floor(y0); |
| 299 | const float dx1 = 1.0f - dx; |
| 300 | const float dy1 = 1.0f - dy; |
| 301 | |
| 302 | const float a00 = *(in.ptr() + xi + yi * stride); |
| 303 | const float a01 = *(in.ptr() + xi_1 + yi * stride); |
| 304 | const float a10 = *(in.ptr() + xi + yi_1 * stride); |
| 305 | const float a11 = *(in.ptr() + xi_1 + yi_1 * stride); |
| 306 | |
| 307 | *out.ptr() = a00 * (dx1 * dy1) + a01 * (dx * dy1) + a10 * (dx1 * dy) + a11 * (dx * dy); |
| 308 | } |
| 309 | break; |
| 310 | default: |
| 311 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 312 | } |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | x0 += M00; |
| 316 | y0 += M10; |
| 317 | }, |
| 318 | in, out); |
| 319 | } |
| 320 | |
| 321 | template <InterpolationPolicy interpolation> |
| 322 | void NEWarpAffineKernel<interpolation>::warp_replicate(const Window &window) |
| 323 | { |
| 324 | // Don't increment in X and Y direction for the input tensor |
| 325 | // A pointer to the start of this plane is needed as base for the precomputed offsets |
| 326 | Window win_in(window); |
| 327 | win_in.set(Window::DimX, Window::Dimension(0, 0, 0)); |
| 328 | win_in.set(Window::DimY, Window::Dimension(0, 0, 0)); |
| 329 | |
| 330 | Iterator in(_input, win_in); |
| 331 | Iterator out(_output, window); |
| 332 | |
| 333 | const int min_x = _input->info()->valid_region().anchor[0]; |
| 334 | const int max_x = min_x + _input->info()->valid_region().shape[0]; |
| 335 | const int min_y = _input->info()->valid_region().anchor[1]; |
| 336 | const int max_y = min_y + _input->info()->valid_region().shape[1]; |
| 337 | const size_t stride = _input->info()->strides_in_bytes()[1]; |
| 338 | |
| 339 | // Current row |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 340 | int y_cur = window.y().start(); |
| 341 | int z_cur = window.z().start(); |
| 342 | int d3_cur = window[3].start(); |
| 343 | int d4_cur = window[4].start(); |
| 344 | int d5_cur = window[5].start(); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 345 | |
| 346 | const float M00 = _matrix[0]; |
| 347 | const float M10 = _matrix[1]; |
| 348 | const float M01 = _matrix[0 + 1 * 2]; |
| 349 | const float M11 = _matrix[1 + 1 * 2]; |
| 350 | const float M02 = _matrix[0 + 2 * 2]; |
| 351 | const float M12 = _matrix[1 + 2 * 2]; |
| 352 | |
| 353 | // "M00 * x" and "M10 * x", when x = window.x.start |
| 354 | const float start_x0 = M00 * window.x().start(); |
| 355 | const float start_y0 = M10 * window.x().start(); |
| 356 | |
| 357 | // const_x0 and const_y0 are the constant parts of x0 and y0 during the row processing |
| 358 | float const_x0 = M01 * y_cur + M02; |
| 359 | float const_y0 = M11 * y_cur + M12; |
| 360 | |
| 361 | float x0 = start_x0 + const_x0; |
| 362 | float y0 = start_y0 + const_y0; |
| 363 | |
| 364 | execute_window_loop(window, [&](const Coordinates & id) |
| 365 | { |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 366 | // Check if we are processing a new row. If so, update the current processed row (y_cur), x0, y0 and z0 |
| 367 | if((y_cur != id.y()) || (z_cur != id.z()) || (d3_cur != id[3]) || (d4_cur != id[4]) || (d5_cur != id[5])) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 368 | { |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 369 | y_cur = id.y(); |
| 370 | z_cur = id.z(); |
| 371 | d3_cur = id[3]; |
| 372 | d4_cur = id[4]; |
| 373 | d5_cur = id[5]; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 374 | |
| 375 | const_x0 = M01 * y_cur + M02; |
| 376 | const_y0 = M11 * y_cur + M12; |
| 377 | |
| 378 | x0 = start_x0 + const_x0; |
| 379 | y0 = start_y0 + const_y0; |
| 380 | } |
| 381 | |
| 382 | // Only load from (x0, y0) if the point is within the valid region. |
| 383 | // Otherwise load from the edge of the valid region. |
| 384 | if((min_y <= y0) && (y0 < max_y) && (min_x <= x0) && (x0 < max_x)) |
| 385 | { |
| 386 | switch(interpolation) |
| 387 | { |
| 388 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 389 | *out.ptr() = nearest_interpolation(in.ptr(), x0, y0, stride); |
| 390 | break; |
| 391 | case InterpolationPolicy::BILINEAR: |
Sang-Hoon Park | 68dd25f | 2020-10-19 16:00:11 +0100 | [diff] [blame] | 392 | *out.ptr() = scale_helpers::pixel_bilinear_c1(in.ptr(), stride, x0, y0); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 393 | break; |
| 394 | default: |
| 395 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 396 | } |
| 397 | } |
| 398 | else |
| 399 | { |
| 400 | // Clamp coordinates |
Diego Lopez Recas | 490b3d8 | 2017-12-19 15:42:25 +0000 | [diff] [blame] | 401 | const auto xi = utility::clamp<int>(std::floor(x0), min_x, max_x - 1); |
| 402 | const auto yi = utility::clamp<int>(std::floor(y0), min_y, max_y - 1); |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 403 | switch(interpolation) |
| 404 | { |
| 405 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 406 | *out.ptr() = *(in.ptr() + xi + yi * stride); |
| 407 | break; |
| 408 | case InterpolationPolicy::BILINEAR: |
| 409 | { |
Diego Lopez Recas | 490b3d8 | 2017-12-19 15:42:25 +0000 | [diff] [blame] | 410 | const auto xi_1 = utility::clamp<int>(std::floor(x0 + 1), min_x, max_x - 1); |
| 411 | const auto yi_1 = utility::clamp<int>(std::floor(y0 + 1), min_y, max_y - 1); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 412 | |
Isabella Gottardi | 83be745 | 2017-08-29 13:47:03 +0100 | [diff] [blame] | 413 | const float dx = x0 - std::floor(x0); |
| 414 | const float dy = y0 - std::floor(y0); |
| 415 | const float dx1 = 1.0f - dx; |
| 416 | const float dy1 = 1.0f - dy; |
| 417 | |
| 418 | const float a00 = *(in.ptr() + xi + yi * stride); |
| 419 | const float a01 = *(in.ptr() + xi_1 + yi * stride); |
| 420 | const float a10 = *(in.ptr() + xi + yi_1 * stride); |
| 421 | const float a11 = *(in.ptr() + xi_1 + yi_1 * stride); |
| 422 | |
| 423 | *out.ptr() = a00 * (dx1 * dy1) + a01 * (dx * dy1) + a10 * (dx1 * dy) + a11 * (dx * dy); |
| 424 | } |
| 425 | break; |
| 426 | default: |
| 427 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 428 | } |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | x0 += M00; |
| 432 | y0 += M10; |
| 433 | }, |
| 434 | in, out); |
| 435 | } |
| 436 | |
| 437 | template <InterpolationPolicy interpolation> |
| 438 | void NEWarpPerspectiveKernel<interpolation>::warp_undefined(const Window &window) |
| 439 | { |
| 440 | // Don't increment in X and Y direction for the input tensor |
| 441 | // A pointer to the start of this plane is needed as base for the precomputed offsets |
| 442 | Window win_in(window); |
| 443 | win_in.set(Window::DimX, Window::Dimension(0, 0, 0)); |
| 444 | win_in.set(Window::DimY, Window::Dimension(0, 0, 0)); |
| 445 | |
| 446 | Iterator in(_input, win_in); |
| 447 | Iterator out(_output, window); |
| 448 | |
| 449 | const int min_x = _input->info()->valid_region().anchor[0]; |
| 450 | const int max_x = min_x + _input->info()->valid_region().shape[0]; |
| 451 | const int min_y = _input->info()->valid_region().anchor[1]; |
| 452 | const int max_y = min_y + _input->info()->valid_region().shape[1]; |
| 453 | const size_t stride = _input->info()->strides_in_bytes()[1]; |
| 454 | |
| 455 | // x0 = M00 * x + M01 * y + M02 |
| 456 | // y0 = M10 * x + M11 * y + M12 |
| 457 | // z0 = M20 * x + M21 * y + M22 |
| 458 | // xn = x0 / z0 |
| 459 | // yn = y0 / z0 |
| 460 | const float M00 = _matrix[0]; |
| 461 | const float M10 = _matrix[1]; |
| 462 | const float M20 = _matrix[2]; |
| 463 | const float M01 = _matrix[0 + 1 * 3]; |
| 464 | const float M11 = _matrix[1 + 1 * 3]; |
| 465 | const float M21 = _matrix[2 + 1 * 3]; |
| 466 | const float M02 = _matrix[0 + 2 * 3]; |
| 467 | const float M12 = _matrix[1 + 2 * 3]; |
| 468 | const float M22 = _matrix[2 + 2 * 3]; |
| 469 | |
| 470 | // "M00 * x", "M10 * x" and "M20 * x", when x = window.x.start |
| 471 | const float start_x0 = M00 * window.x().start(); |
| 472 | const float start_y0 = M10 * window.x().start(); |
| 473 | const float start_z0 = M20 * window.x().start(); |
| 474 | |
| 475 | // Current row |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 476 | int y_cur = window.y().start(); |
| 477 | int z_cur = window.z().start(); |
| 478 | int d3_cur = window[3].start(); |
| 479 | int d4_cur = window[4].start(); |
| 480 | int d5_cur = window[5].start(); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 481 | |
| 482 | // const_x0, const_y0 and const_z0 are the constant parts of x0, y0 and z0 during the row processing |
| 483 | float const_x0 = M01 * y_cur + M02; |
| 484 | float const_y0 = M11 * y_cur + M12; |
| 485 | float const_z0 = M21 * y_cur + M22; |
| 486 | |
| 487 | // Perspective warp coordinates |
| 488 | float x0 = start_x0 + const_x0; |
| 489 | float y0 = start_y0 + const_y0; |
| 490 | float z0 = start_z0 + const_z0; |
| 491 | |
| 492 | execute_window_loop(window, [&](const Coordinates & id) |
| 493 | { |
| 494 | // Check if we are processing a new row. If so, update the current processed row (y_cur), x0, y0 and z0 |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 495 | if((y_cur != id.y()) || (z_cur != id.z()) || (d3_cur != id[3]) || (d4_cur != id[4]) || (d5_cur != id[5])) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 496 | { |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 497 | y_cur = id.y(); |
| 498 | z_cur = id.z(); |
| 499 | d3_cur = id[3]; |
| 500 | d4_cur = id[4]; |
| 501 | d5_cur = id[5]; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 502 | |
| 503 | const_x0 = M01 * y_cur + M02; |
| 504 | const_y0 = M11 * y_cur + M12; |
| 505 | const_z0 = M21 * y_cur + M22; |
| 506 | |
| 507 | x0 = start_x0 + const_x0; |
| 508 | y0 = start_y0 + const_y0; |
| 509 | z0 = start_z0 + const_z0; |
| 510 | } |
| 511 | |
| 512 | const float xn = x0 / z0; |
| 513 | const float yn = y0 / z0; |
| 514 | |
| 515 | // Only write to output if xn and yn are within the valid region. |
| 516 | // Otherwise the read value would be undefined. |
| 517 | if((min_y <= yn) && (yn < max_y) && (min_x <= xn) && (xn < max_x)) |
| 518 | { |
| 519 | switch(interpolation) |
| 520 | { |
| 521 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 522 | *out.ptr() = nearest_interpolation(in.ptr(), xn, yn, stride); |
| 523 | break; |
| 524 | case InterpolationPolicy::BILINEAR: |
Sang-Hoon Park | 68dd25f | 2020-10-19 16:00:11 +0100 | [diff] [blame] | 525 | *out.ptr() = scale_helpers::pixel_bilinear_c1(in.ptr(), stride, xn, yn); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 526 | break; |
| 527 | default: |
| 528 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | x0 += M00; |
| 533 | y0 += M10; |
| 534 | z0 += M20; |
| 535 | }, |
| 536 | in, out); |
| 537 | } |
| 538 | |
| 539 | template <InterpolationPolicy interpolation> |
| 540 | void NEWarpPerspectiveKernel<interpolation>::warp_constant(const Window &window) |
| 541 | { |
| 542 | // Don't increment in X and Y direction for the input tensor |
| 543 | // A pointer to the start of this plane is needed as base for the precomputed offsets |
| 544 | Window win_in(window); |
| 545 | win_in.set(Window::DimX, Window::Dimension(0, 0, 0)); |
| 546 | win_in.set(Window::DimY, Window::Dimension(0, 0, 0)); |
| 547 | |
| 548 | Iterator in(_input, win_in); |
| 549 | Iterator out(_output, window); |
| 550 | |
| 551 | const int min_x = _input->info()->valid_region().anchor[0]; |
| 552 | const int max_x = min_x + _input->info()->valid_region().shape[0]; |
| 553 | const int min_y = _input->info()->valid_region().anchor[1]; |
| 554 | const int max_y = min_y + _input->info()->valid_region().shape[1]; |
| 555 | const size_t stride = _input->info()->strides_in_bytes()[1]; |
| 556 | |
| 557 | // x0 = M00 * x + M01 * y + M02 |
| 558 | // y0 = M10 * x + M11 * y + M12 |
| 559 | // z0 = M20 * x + M21 * y + M22 |
| 560 | // xn = x0 / z0 |
| 561 | // yn = y0 / z0 |
| 562 | const float M00 = _matrix[0]; |
| 563 | const float M10 = _matrix[1]; |
| 564 | const float M20 = _matrix[2]; |
| 565 | const float M01 = _matrix[0 + 1 * 3]; |
| 566 | const float M11 = _matrix[1 + 1 * 3]; |
| 567 | const float M21 = _matrix[2 + 1 * 3]; |
| 568 | const float M02 = _matrix[0 + 2 * 3]; |
| 569 | const float M12 = _matrix[1 + 2 * 3]; |
| 570 | const float M22 = _matrix[2 + 2 * 3]; |
| 571 | |
| 572 | // "M00 * x", "M10 * x" and "M20 * x", when x = window.x.start |
| 573 | const float start_x0 = M00 * window.x().start(); |
| 574 | const float start_y0 = M10 * window.x().start(); |
| 575 | const float start_z0 = M20 * window.x().start(); |
| 576 | |
| 577 | // Current row |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 578 | int y_cur = window.y().start(); |
| 579 | int z_cur = window.z().start(); |
| 580 | int d3_cur = window[3].start(); |
| 581 | int d4_cur = window[4].start(); |
| 582 | int d5_cur = window[5].start(); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 583 | |
| 584 | // const_x0, const_y0 and const_z0 are the constant parts of x0, y0 and z0 during the row processing |
| 585 | float const_x0 = M01 * y_cur + M02; |
| 586 | float const_y0 = M11 * y_cur + M12; |
| 587 | float const_z0 = M21 * y_cur + M22; |
| 588 | |
| 589 | // Perspective warp coordinates |
| 590 | float x0 = start_x0 + const_x0; |
| 591 | float y0 = start_y0 + const_y0; |
| 592 | float z0 = start_z0 + const_z0; |
| 593 | |
| 594 | execute_window_loop(window, [&](const Coordinates & id) |
| 595 | { |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 596 | // Check if we are processing a new row. If so, update the current processed row (y_cur), x0, y0 and z0 |
| 597 | if((y_cur != id.y()) || (z_cur != id.z()) || (d3_cur != id[3]) || (d4_cur != id[4]) || (d5_cur != id[5])) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 598 | { |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 599 | y_cur = id.y(); |
| 600 | z_cur = id.z(); |
| 601 | d3_cur = id[3]; |
| 602 | d4_cur = id[4]; |
| 603 | d5_cur = id[5]; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 604 | |
| 605 | const_x0 = M01 * y_cur + M02; |
| 606 | const_y0 = M11 * y_cur + M12; |
| 607 | const_z0 = M21 * y_cur + M22; |
| 608 | |
| 609 | x0 = start_x0 + const_x0; |
| 610 | y0 = start_y0 + const_y0; |
| 611 | z0 = start_z0 + const_z0; |
| 612 | } |
| 613 | |
| 614 | const float xn = x0 / z0; |
| 615 | const float yn = y0 / z0; |
| 616 | |
| 617 | // Only use input values if xn and yn are within the valid region. |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 618 | if((min_y <= yn) && (yn < max_y) && (min_x <= xn) && (xn < max_x)) |
| 619 | { |
| 620 | switch(interpolation) |
| 621 | { |
| 622 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 623 | *out.ptr() = nearest_interpolation(in.ptr(), xn, yn, stride); |
| 624 | break; |
| 625 | case InterpolationPolicy::BILINEAR: |
Sang-Hoon Park | 68dd25f | 2020-10-19 16:00:11 +0100 | [diff] [blame] | 626 | *out.ptr() = scale_helpers::pixel_bilinear_c1(in.ptr(), stride, xn, yn); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 627 | break; |
| 628 | default: |
| 629 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 630 | } |
| 631 | } |
| 632 | else |
| 633 | { |
Isabella Gottardi | 6203153 | 2017-07-04 11:21:28 +0100 | [diff] [blame] | 634 | switch(interpolation) |
| 635 | { |
| 636 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 637 | *out.ptr() = _constant_border_value; |
| 638 | break; |
| 639 | case InterpolationPolicy::BILINEAR: |
| 640 | { |
Diego Lopez Recas | 490b3d8 | 2017-12-19 15:42:25 +0000 | [diff] [blame] | 641 | const auto xi = utility::clamp<int>(std::floor(xn), min_x - 1, max_x); |
| 642 | const auto yi = utility::clamp<int>(std::floor(yn), min_y - 1, max_y); |
| 643 | const auto xi_1 = utility::clamp<int>(std::floor(xn + 1), min_x - 1, max_x); |
| 644 | const auto yi_1 = utility::clamp<int>(std::floor(yn + 1), min_y - 1, max_y); |
Isabella Gottardi | 6203153 | 2017-07-04 11:21:28 +0100 | [diff] [blame] | 645 | |
| 646 | const float dx = xn - std::floor(xn); |
| 647 | const float dy = yn - std::floor(yn); |
| 648 | const float dx1 = 1.0f - dx; |
| 649 | const float dy1 = 1.0f - dy; |
| 650 | |
| 651 | const float a00 = *(in.ptr() + xi + yi * stride); |
| 652 | const float a01 = *(in.ptr() + xi_1 + yi * stride); |
| 653 | const float a10 = *(in.ptr() + xi + yi_1 * stride); |
| 654 | const float a11 = *(in.ptr() + xi_1 + yi_1 * stride); |
| 655 | |
| 656 | *out.ptr() = a00 * (dx1 * dy1) + a01 * (dx * dy1) + a10 * (dx1 * dy) + a11 * (dx * dy); |
| 657 | } |
| 658 | break; |
| 659 | default: |
| 660 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 661 | } |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | x0 += M00; |
| 665 | y0 += M10; |
| 666 | z0 += M20; |
| 667 | }, |
| 668 | in, out); |
| 669 | } |
| 670 | |
| 671 | template <InterpolationPolicy interpolation> |
| 672 | void NEWarpPerspectiveKernel<interpolation>::warp_replicate(const Window &window) |
| 673 | { |
| 674 | // Don't increment in X and Y direction for the input tensor |
| 675 | // A pointer to the start of this plane is needed as base for the precomputed offsets |
| 676 | Window win_in(window); |
| 677 | win_in.set(Window::DimX, Window::Dimension(0, 0, 0)); |
| 678 | win_in.set(Window::DimY, Window::Dimension(0, 0, 0)); |
| 679 | |
| 680 | Iterator in(_input, win_in); |
| 681 | Iterator out(_output, window); |
| 682 | |
| 683 | const int min_x = _input->info()->valid_region().anchor[0]; |
| 684 | const int max_x = min_x + _input->info()->valid_region().shape[0]; |
| 685 | const int min_y = _input->info()->valid_region().anchor[1]; |
| 686 | const int max_y = min_y + _input->info()->valid_region().shape[1]; |
| 687 | const size_t stride = _input->info()->strides_in_bytes()[1]; |
| 688 | |
| 689 | // Current row |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 690 | int y_cur = window.y().start(); |
| 691 | int z_cur = window.z().start(); |
| 692 | int d3_cur = window[3].start(); |
| 693 | int d4_cur = window[4].start(); |
| 694 | int d5_cur = window[5].start(); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 695 | |
| 696 | // x0 = M00 * x + M01 * y + M02 |
| 697 | // y0 = M10 * x + M11 * y + M12 |
| 698 | // z0 = M20 * x + M21 * y + M22 |
| 699 | // xn = x0 / z0 |
| 700 | // yn = y0 / z0 |
| 701 | const float M00 = _matrix[0]; |
| 702 | const float M10 = _matrix[1]; |
| 703 | const float M20 = _matrix[2]; |
| 704 | const float M01 = _matrix[0 + 1 * 3]; |
| 705 | const float M11 = _matrix[1 + 1 * 3]; |
| 706 | const float M21 = _matrix[2 + 1 * 3]; |
| 707 | const float M02 = _matrix[0 + 2 * 3]; |
| 708 | const float M12 = _matrix[1 + 2 * 3]; |
| 709 | const float M22 = _matrix[2 + 2 * 3]; |
| 710 | |
| 711 | // "M00 * x", "M10 * x" and "M20 * x", when x = window.x.start |
| 712 | const float start_x0 = M00 * window.x().start(); |
| 713 | const float start_y0 = M10 * window.x().start(); |
| 714 | const float start_z0 = M20 * window.x().start(); |
| 715 | |
| 716 | // const_x0, const_y0 and const_z0 are the constant parts of x0, y0 and z0 during the row processing |
| 717 | float const_x0 = M01 * y_cur + M02; |
| 718 | float const_y0 = M11 * y_cur + M12; |
| 719 | float const_z0 = M21 * y_cur + M22; |
| 720 | |
| 721 | // Perspective warp coordinates |
| 722 | float x0 = start_x0 + const_x0; |
| 723 | float y0 = start_y0 + const_y0; |
| 724 | float z0 = start_z0 + const_z0; |
| 725 | |
| 726 | execute_window_loop(window, [&](const Coordinates & id) |
| 727 | { |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 728 | // Check if we are processing a new row. If so, update the current processed row (y_cur), x0, y0 and z0 |
| 729 | if((y_cur != id.y()) || (z_cur != id.z()) || (d3_cur != id[3]) || (d4_cur != id[4]) || (d5_cur != id[5])) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 730 | { |
Isabella Gottardi | 40ff03b | 2017-08-10 16:44:42 +0100 | [diff] [blame] | 731 | y_cur = id.y(); |
| 732 | z_cur = id.z(); |
| 733 | d3_cur = id[3]; |
| 734 | d4_cur = id[4]; |
| 735 | d5_cur = id[5]; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 736 | |
| 737 | const_x0 = M01 * y_cur + M02; |
| 738 | const_y0 = M11 * y_cur + M12; |
| 739 | const_z0 = M21 * y_cur + M22; |
| 740 | |
| 741 | x0 = start_x0 + const_x0; |
| 742 | y0 = start_y0 + const_y0; |
| 743 | z0 = start_z0 + const_z0; |
| 744 | } |
| 745 | |
| 746 | const float xn = x0 / z0; |
| 747 | const float yn = y0 / z0; |
| 748 | |
| 749 | // Only load from (x0, y0) if the point is within the valid region. |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 750 | if((min_y <= yn) && (yn < max_y) && (min_x <= xn) && (xn < max_x)) |
| 751 | { |
| 752 | switch(interpolation) |
| 753 | { |
| 754 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 755 | *out.ptr() = nearest_interpolation(in.ptr(), xn, yn, stride); |
| 756 | break; |
| 757 | case InterpolationPolicy::BILINEAR: |
Sang-Hoon Park | 68dd25f | 2020-10-19 16:00:11 +0100 | [diff] [blame] | 758 | *out.ptr() = scale_helpers::pixel_bilinear_c1(in.ptr(), stride, xn, yn); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 759 | break; |
| 760 | default: |
| 761 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 762 | } |
| 763 | } |
| 764 | else |
| 765 | { |
| 766 | // Clamp coordinates |
Diego Lopez Recas | 490b3d8 | 2017-12-19 15:42:25 +0000 | [diff] [blame] | 767 | const auto xi = utility::clamp<int>(std::floor(xn), min_x, max_x - 1); |
| 768 | const auto yi = utility::clamp<int>(std::floor(yn), min_y, max_y - 1); |
Isabella Gottardi | 6203153 | 2017-07-04 11:21:28 +0100 | [diff] [blame] | 769 | switch(interpolation) |
| 770 | { |
| 771 | case InterpolationPolicy::NEAREST_NEIGHBOR: |
| 772 | *out.ptr() = *(in.ptr() + xi + yi * stride); |
| 773 | break; |
| 774 | case InterpolationPolicy::BILINEAR: |
| 775 | { |
Diego Lopez Recas | 490b3d8 | 2017-12-19 15:42:25 +0000 | [diff] [blame] | 776 | const auto xi_1 = utility::clamp<int>(std::floor(xn + 1), min_x, max_x - 1); |
| 777 | const auto yi_1 = utility::clamp<int>(std::floor(yn + 1), min_y, max_y - 1); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 778 | |
Isabella Gottardi | 6203153 | 2017-07-04 11:21:28 +0100 | [diff] [blame] | 779 | const float dx = xn - std::floor(xn); |
| 780 | const float dy = yn - std::floor(yn); |
| 781 | const float dx1 = 1.0f - dx; |
| 782 | const float dy1 = 1.0f - dy; |
| 783 | |
| 784 | const float a00 = *(in.ptr() + xi + yi * stride); |
| 785 | const float a01 = *(in.ptr() + xi_1 + yi * stride); |
| 786 | const float a10 = *(in.ptr() + xi + yi_1 * stride); |
| 787 | const float a11 = *(in.ptr() + xi_1 + yi_1 * stride); |
| 788 | |
| 789 | *out.ptr() = a00 * (dx1 * dy1) + a01 * (dx * dy1) + a10 * (dx1 * dy) + a11 * (dx * dy); |
| 790 | } |
| 791 | break; |
| 792 | default: |
| 793 | ARM_COMPUTE_ERROR("Interpolation not supported"); |
| 794 | } |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 795 | } |
| 796 | |
| 797 | x0 += M00; |
| 798 | y0 += M10; |
| 799 | z0 += M20; |
| 800 | }, |
| 801 | in, out); |
| 802 | } |
| 803 | |
| 804 | template class arm_compute::NEWarpAffineKernel<InterpolationPolicy::NEAREST_NEIGHBOR>; |
| 805 | template class arm_compute::NEWarpAffineKernel<InterpolationPolicy::BILINEAR>; |
| 806 | template class arm_compute::NEWarpPerspectiveKernel<InterpolationPolicy::NEAREST_NEIGHBOR>; |
| 807 | template class arm_compute::NEWarpPerspectiveKernel<InterpolationPolicy::BILINEAR>; |