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/*
* 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/CPP/kernels/CPPCornerCandidatesKernel.h"
#include "arm_compute/core/Coordinates.h"
#include "arm_compute/core/Error.h"
#include "arm_compute/core/Helpers.h"
#include "arm_compute/core/IAccessWindow.h"
#include "arm_compute/core/TensorInfo.h"
#include "arm_compute/core/Types.h"
#include "arm_compute/core/Utils.h"
#include "arm_compute/core/Validate.h"
#include "arm_compute/core/Window.h"
using namespace arm_compute;
namespace
{
inline void check_corner(float x, float y, float strength, InternalKeypoint *output, int32_t *num_corner_candidates, arm_compute::Mutex *corner_candidates_mutex)
{
if(strength != 0.0f)
{
/* Set index and update num_corner_candidate */
std::unique_lock<arm_compute::Mutex> lock(*corner_candidates_mutex);
const int32_t idx = *num_corner_candidates;
*num_corner_candidates += 1;
lock.unlock();
/* Add keypoint */
output[idx] = std::make_tuple(x, y, strength);
}
}
inline void corner_candidates(const float *__restrict input, InternalKeypoint *__restrict output, int32_t x, int32_t y, int32_t *num_corner_candidates, arm_compute::Mutex *corner_candidates_mutex)
{
check_corner(x, y, *input, output, num_corner_candidates, corner_candidates_mutex);
}
} // namespace
bool keypoint_compare(const InternalKeypoint &lhs, const InternalKeypoint &rhs)
{
return std::get<2>(lhs) > std::get<2>(rhs);
}
CPPCornerCandidatesKernel::CPPCornerCandidatesKernel()
: _num_corner_candidates(nullptr), _corner_candidates_mutex(), _input(nullptr), _output(nullptr)
{
}
void CPPCornerCandidatesKernel::configure(const IImage *input, InternalKeypoint *output, int32_t *num_corner_candidates)
{
ARM_COMPUTE_ERROR_ON_TENSOR_NOT_2D(input);
ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::F32);
ARM_COMPUTE_ERROR_ON(nullptr == output);
ARM_COMPUTE_ERROR_ON(nullptr == num_corner_candidates);
ARM_COMPUTE_ERROR_ON(*num_corner_candidates != 0);
_input = input;
_output = output;
_num_corner_candidates = num_corner_candidates;
const unsigned int num_elems_processed_per_iteration = 1;
// Configure kernel window
Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration));
update_window_and_padding(win, AccessWindowHorizontal(input->info(), 0, num_elems_processed_per_iteration));
INEKernel::configure(win);
}
void CPPCornerCandidatesKernel::run(const Window &window, const ThreadInfo &info)
{
ARM_COMPUTE_UNUSED(info);
ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INEKernel::window(), window);
Iterator input(_input, window);
execute_window_loop(window, [&](const Coordinates & id)
{
corner_candidates(reinterpret_cast<float *>(input.ptr()), &_output[0], id.x(), id.y(), _num_corner_candidates, &_corner_candidates_mutex);
},
input);
}
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