COMPMID-344 Updated doxygen
Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae
diff --git a/src/core/CPP/kernels/CPPCornerCandidatesKernel.cpp b/src/core/CPP/kernels/CPPCornerCandidatesKernel.cpp
new file mode 100644
index 0000000..884da28
--- /dev/null
+++ b/src/core/CPP/kernels/CPPCornerCandidatesKernel.cpp
@@ -0,0 +1,110 @@
+/*
+ * 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, std::mutex *corner_candidates_mutex)
+{
+ if(strength != 0.0f)
+ {
+ /* Set index and update num_corner_candidate */
+ std::unique_lock<std::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, std::mutex *corner_candidates_mutex)
+{
+ check_corner(x + 0, y, *(input + 0), output, num_corner_candidates, corner_candidates_mutex);
+ check_corner(x + 1, y, *(input + 1), output, num_corner_candidates, corner_candidates_mutex);
+ check_corner(x + 2, y, *(input + 2), output, num_corner_candidates, corner_candidates_mutex);
+ check_corner(x + 3, y, *(input + 3), 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 = 4;
+
+ // 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)
+{
+ 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);
+}