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/*
* Copyright (c) 2017-2020 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/CLNonLinearFilterKernel.h"
#include "arm_compute/core/CL/CLHelpers.h"
#include "arm_compute/core/CL/CLKernelLibrary.h"
#include "arm_compute/core/CL/ICLTensor.h"
#include "arm_compute/core/CL/OpenCL.h"
#include "arm_compute/core/Error.h"
#include "arm_compute/core/Helpers.h"
#include "arm_compute/core/TensorInfo.h"
#include "arm_compute/core/Utils.h"
#include "arm_compute/core/Validate.h"
#include "arm_compute/core/Window.h"
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <set>
#include <sstream>
#include <string>
using namespace arm_compute;
CLNonLinearFilterKernel::CLNonLinearFilterKernel()
: _border_size(0)
{
}
BorderSize CLNonLinearFilterKernel::border_size() const
{
return _border_size;
}
void CLNonLinearFilterKernel::configure(const ICLTensor *input, ICLTensor *output, NonLinearFilterFunction function,
unsigned int mask_size, MatrixPattern pattern, const uint8_t *mask,
bool border_undefined)
{
configure(CLKernelLibrary::get().get_compile_context(), input, output, function, mask_size, pattern, mask, border_undefined);
}
void CLNonLinearFilterKernel::configure(const CLCompileContext &compile_context, const ICLTensor *input, ICLTensor *output, NonLinearFilterFunction function,
unsigned int mask_size, MatrixPattern pattern, const uint8_t *mask,
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::U8);
ARM_COMPUTE_ERROR_ON(mask_size != 3 && mask_size != 5);
ARM_COMPUTE_ERROR_ON_MSG(pattern == MatrixPattern::OTHER, "MatrixPattern::OTHER is not supported!");
ARM_COMPUTE_UNUSED(mask);
_input = input;
_output = output;
_border_size = BorderSize(mask_size / 2);
// Define build options
std::set<std::string> build_opts;
build_opts.emplace("-D" + string_from_non_linear_filter_function(function));
// Define kernel
std::string pattern_name = string_from_matrix_pattern(pattern);
std::transform(pattern_name.begin(), pattern_name.end(), pattern_name.begin(), ::tolower);
std::stringstream ss;
ss << "non_linear_filter_" << pattern_name << mask_size << "x" << mask_size;
// Create kernel
_kernel = create_kernel(compile_context, ss.str(), build_opts);
// Configure kernel window
constexpr unsigned int num_elems_processed_per_iteration = 8;
constexpr unsigned int num_elems_read_per_iteration = 16;
const unsigned int num_rows_read_per_iteration = mask_size;
Window win = calculate_max_window(*input->info(), num_elems_processed_per_iteration, border_undefined, border_size());
AccessWindowRectangle input_access(input->info(), -border_size().left, -border_size().top, num_elems_read_per_iteration, num_rows_read_per_iteration);
AccessWindowHorizontal output_access(output->info(), 0, num_elems_processed_per_iteration);
update_window_and_padding(win, input_access, output_access);
output_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size());
ICLKernel::configure_internal(win);
}
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