src/core/CL/kernels/CLAbsoluteDifferenceKernel.cpp

   1 /*
   2  * Copyright (c) 2016, 2017 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 "arm_compute/core/CL/kernels/CLAbsoluteDifferenceKernel.h"
  25
  26 #include "arm_compute/core/CL/CLHelpers.h"
  27 #include "arm_compute/core/CL/CLKernelLibrary.h"
  28 #include "arm_compute/core/CL/ICLTensor.h"
  29 #include "arm_compute/core/CL/OpenCL.h"
  30 #include "arm_compute/core/Error.h"
  31 #include "arm_compute/core/Helpers.h"
  32 #include "arm_compute/core/TensorInfo.h"
  33 #include "arm_compute/core/Types.h"
  34 #include "arm_compute/core/Validate.h"
  35 #include "arm_compute/core/Window.h"
  36
  37 #include <set>
  38 #include <string>
  39
  40 using namespace arm_compute;
  41
  42 CLAbsoluteDifferenceKernel::CLAbsoluteDifferenceKernel()
  43     : _input1(nullptr), _input2(nullptr), _output(nullptr)
  44 {
  45 }
  46
  47 void CLAbsoluteDifferenceKernel::configure(const ICLTensor *input1, const ICLTensor *input2, ICLTensor *output)
  48 {
  49     ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input1, 1, DataType::U8, DataType::S16);
  50     ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input2, 1, DataType::U8, DataType::S16);
  51     ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U8, DataType::S16);
  52     ARM_COMPUTE_ERROR_ON_MSG(output->info()->data_type() == DataType::U8 && (input1->info()->data_type() != DataType::U8 || input2->info()->data_type() != DataType::U8),
  53                              "The output image can only be U8 if both input images are U8");
  54
  55     _input1 = input1;
  56     _input2 = input2;
  57     _output = output;
  58
  59     // Set kernel build options
  60     std::set<std::string> build_opts;
  61     build_opts.insert("-DDATA_TYPE_IN1=" + get_cl_type_from_data_type(input1->info()->data_type()));
  62     build_opts.insert("-DDATA_TYPE_IN2=" + get_cl_type_from_data_type(input2->info()->data_type()));
  63     build_opts.insert("-DDATA_TYPE_OUT=" + get_cl_type_from_data_type(output->info()->data_type()));
  64
  65     // Create kernel
  66     _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel("absdiff", build_opts));
  67
  68     // Configure kernel window
  69     constexpr unsigned int num_elems_processed_per_iteration = 16;
  70
  71     Window win = calculate_max_window(*input1->info(), Steps(num_elems_processed_per_iteration));
  72
  73     AccessWindowHorizontal input1_access(input1->info(), 0, num_elems_processed_per_iteration);
  74     AccessWindowHorizontal input2_access(input2->info(), 0, num_elems_processed_per_iteration);
  75     AccessWindowHorizontal output_access(output->info(), 0, num_elems_processed_per_iteration);
  76
  77     update_window_and_padding(win, input1_access, input2_access, output_access);
  78
  79     ValidRegion valid_region = intersect_valid_regions(input1->info()->valid_region(),
  80                                                        input2->info()->valid_region());
  81
  82     output_access.set_valid_region(win, valid_region);
  83
  84     ICLKernel::configure(win);
  85 }
  86
  87 void CLAbsoluteDifferenceKernel::run(const Window &window, cl::CommandQueue &queue)
  88 {
  89     ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
  90     ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICLKernel::window(), window);
  91
  92     Window slice = window.first_slice_window_2D();
  93     do
  94     {
  95         unsigned int idx = 0;
  96         add_2D_tensor_argument(idx, _input1, slice);
  97         add_2D_tensor_argument(idx, _input2, slice);
  98         add_2D_tensor_argument(idx, _output, slice);
  99         enqueue(queue, *this, slice);
 100     }
 101     while(window.slide_window_slice_2D(slice));
 102 }