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author | Anthony Barbier <anthony.barbier@arm.com> | 2017-09-04 18:44:23 +0100 |
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committer | Anthony Barbier <anthony.barbier@arm.com> | 2018-09-17 13:03:09 +0100 |
commit | 6ff3b19ee6120edf015fad8caab2991faa3070af (patch) | |
tree | a7a6dcd16dfd56d79fa1b56a313caeebcc939b68 /src/core/CL/kernels/CLGaussianPyramidKernel.cpp | |
download | ComputeLibrary-6ff3b19ee6120edf015fad8caab2991faa3070af.tar.gz |
COMPMID-344 Updated doxygen
Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae
Diffstat (limited to 'src/core/CL/kernels/CLGaussianPyramidKernel.cpp')
-rw-r--r-- | src/core/CL/kernels/CLGaussianPyramidKernel.cpp | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/src/core/CL/kernels/CLGaussianPyramidKernel.cpp b/src/core/CL/kernels/CLGaussianPyramidKernel.cpp new file mode 100644 index 0000000000..34a228c717 --- /dev/null +++ b/src/core/CL/kernels/CLGaussianPyramidKernel.cpp @@ -0,0 +1,218 @@ +/* + * Copyright (c) 2017 ARM Limited. + * + * SPDX-License-Identifier: MIT + * + * 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 "arm_compute/core/CL/kernels/CLGaussianPyramidKernel.h" + +#include "arm_compute/core/CL/CLKernelLibrary.h" +#include "arm_compute/core/CL/ICLTensor.h" +#include "arm_compute/core/Helpers.h" +#include "arm_compute/core/Utils.h" +#include "arm_compute/core/Validate.h" + +using namespace arm_compute; + +CLGaussianPyramidHorKernel::CLGaussianPyramidHorKernel() + : _border_size(0), _l2_load_offset(0) +{ +} + +BorderSize CLGaussianPyramidHorKernel::border_size() const +{ + return _border_size; +} + +void CLGaussianPyramidHorKernel::configure(const ICLTensor *input, ICLTensor *output, bool border_undefined) +{ + ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8); + ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U16); + ARM_COMPUTE_ERROR_ON(input->info()->dimension(0) != 2 * output->info()->dimension(0)); + ARM_COMPUTE_ERROR_ON(input->info()->dimension(1) != output->info()->dimension(1)); + + for(size_t i = 2; i < Coordinates::num_max_dimensions; ++i) + { + ARM_COMPUTE_ERROR_ON(input->info()->dimension(i) != output->info()->dimension(i)); + } + + _input = input; + _output = output; + _border_size = BorderSize(border_undefined ? 0 : 2, 2); + + // Create kernel + _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel("gaussian1x5_sub_x")); + + // Configure kernel window + constexpr unsigned int num_elems_processed_per_iteration = 16; + constexpr unsigned int num_elems_read_per_iteration = 20; + constexpr unsigned int num_elems_written_per_iteration = 8; + constexpr float scale_x = 0.5f; + + Window win = calculate_max_window_horizontal(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size()); + AccessWindowHorizontal output_access(output->info(), 0, num_elems_written_per_iteration, scale_x); + + // Sub sampling selects odd pixels (1, 3, 5, ...) for images with even + // width and even pixels (0, 2, 4, ...) for images with odd width. (Whether + // a pixel is even or odd is determined based on the tensor shape not the + // valid region!) + // Thus the offset from which the first pixel (L2) for the convolution is + // loaded depends on the anchor and shape of the valid region. + // In the case of an even shape (= even image width) we need to load L2 + // from -2 if the anchor is odd and from -1 if the anchor is even. That + // makes sure that L2 is always loaded from an odd pixel. + // On the other hand, for an odd shape (= odd image width) we need to load + // L2 from -1 if the anchor is odd and from -2 if the anchor is even to + // achieve the opposite effect. + // The condition can be simplified to checking whether anchor + shape is + // odd (-2) or even (-1) as only adding an odd and an even number will have + // an odd result. + _l2_load_offset = -border_size().left; + + if((_input->info()->valid_region().anchor[0] + _input->info()->valid_region().shape[0]) % 2 == 0) + { + _l2_load_offset += 1; + } + + update_window_and_padding(win, + AccessWindowHorizontal(input->info(), _l2_load_offset, num_elems_read_per_iteration), + output_access); + + ValidRegion valid_region = input->info()->valid_region(); + valid_region.anchor.set(0, std::ceil((valid_region.anchor[0] + (border_undefined ? border_size().left : 0)) / 2.f)); + valid_region.shape.set(0, (valid_region.shape[0] - (border_undefined ? border_size().right : 0)) / 2 - valid_region.anchor[0]); + + output_access.set_valid_region(win, valid_region); + + ICLKernel::configure(win); +} + +void CLGaussianPyramidHorKernel::run(const Window &window, cl::CommandQueue &queue) +{ + ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this); + ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICLKernel::window(), window); + + Window win_in(window); + win_in.shift(Window::DimX, _l2_load_offset); + + //The output is half the width of the input: + Window win_out(window); + win_out.scale(Window::DimX, 0.5f); + + Window slice_in = win_in.first_slice_window_2D(); + Window slice_out = win_out.first_slice_window_2D(); + + do + { + unsigned int idx = 0; + add_2D_tensor_argument(idx, _input, slice_in); + add_2D_tensor_argument(idx, _output, slice_out); + enqueue(queue, *this, slice_out); + } + while(win_in.slide_window_slice_2D(slice_in) && win_out.slide_window_slice_2D(slice_out)); +} + +CLGaussianPyramidVertKernel::CLGaussianPyramidVertKernel() + : _t2_load_offset(0) +{ +} + +BorderSize CLGaussianPyramidVertKernel::border_size() const +{ + return BorderSize(2, 0); +} + +void CLGaussianPyramidVertKernel::configure(const ICLTensor *input, ICLTensor *output, bool border_undefined) +{ + ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U16); + ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U8); + ARM_COMPUTE_ERROR_ON(input->info()->dimension(0) != output->info()->dimension(0)); + ARM_COMPUTE_ERROR_ON(input->info()->dimension(1) != 2 * output->info()->dimension(1)); + + for(size_t i = 2; i < Coordinates::num_max_dimensions; ++i) + { + ARM_COMPUTE_ERROR_ON(input->info()->dimension(i) != output->info()->dimension(i)); + } + + _input = input; + _output = output; + + // Create kernel + _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel("gaussian5x1_sub_y")); + + // Configure kernel window + constexpr unsigned int num_elems_processed_per_iteration = 8; + constexpr unsigned int num_rows_processed_per_iteration = 2; + constexpr unsigned int num_elems_written_per_iteration = 8; + constexpr unsigned int num_elems_read_per_iteration = 8; + constexpr unsigned int num_rows_per_iteration = 5; + constexpr float scale_y = 0.5f; + + Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration, num_rows_processed_per_iteration), + border_undefined, border_size()); + AccessWindowRectangle output_access(output->info(), 0, 0, num_elems_written_per_iteration, num_rows_per_iteration, 1.f, scale_y); + + // Determine whether we need to load even or odd rows. See above for a + // detailed explanation. + _t2_load_offset = -border_size().top; + + if((_input->info()->valid_region().anchor[1] + _input->info()->valid_region().shape[1]) % 2 == 0) + { + _t2_load_offset += 1; + } + + update_window_and_padding(win, + AccessWindowRectangle(input->info(), 0, _t2_load_offset, num_elems_read_per_iteration, num_rows_per_iteration), + output_access); + + ValidRegion valid_region = input->info()->valid_region(); + valid_region.anchor.set(1, std::ceil((valid_region.anchor[1] + (border_undefined ? border_size().top : 0)) / 2.f)); + valid_region.shape.set(1, (valid_region.shape[1] - (border_undefined ? border_size().bottom : 0)) / 2 - valid_region.anchor[1]); + + output_access.set_valid_region(win, valid_region); + + ICLKernel::configure(win); +} + +void CLGaussianPyramidVertKernel::run(const Window &window, cl::CommandQueue &queue) +{ + ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this); + ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(IKernel::window(), window); + ARM_COMPUTE_ERROR_ON(window.x().step() != 8); + ARM_COMPUTE_ERROR_ON(window.y().step() % 2); + + Window win_in(window); + win_in.shift(Window::DimY, _t2_load_offset); + + Window win_out(window); + win_out.scale(Window::DimY, 0.5f); + + Window slice_in = win_in.first_slice_window_2D(); + Window slice_out = win_out.first_slice_window_2D(); + + do + { + unsigned int idx = 0; + add_2D_tensor_argument(idx, _input, slice_in); + add_2D_tensor_argument(idx, _output, slice_out); + enqueue(queue, *this, slice_out); + } + while(win_in.slide_window_slice_2D(slice_in) && win_out.slide_window_slice_2D(slice_out)); +} |