COMPMID-585: Port OpticalFlow to new validation

Change-Id: Ia36bd11ca27420d3059eea15df81b237900149ec
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/125175
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: John Richardson <john.richardson@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/tests/datasets/OpticalFlowDataset.h b/tests/datasets/OpticalFlowDataset.h
new file mode 100644
index 0000000..9e24720
--- /dev/null
+++ b/tests/datasets/OpticalFlowDataset.h
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2018 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.
+ */
+#ifndef ARM_COMPUTE_TEST_OPTICAL_FLOW_DATASET
+#define ARM_COMPUTE_TEST_OPTICAL_FLOW_DATASET
+
+#include "tests/validation/Helpers.h"
+#include "utils/TypePrinter.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace datasets
+{
+class OpticalFlowDataset
+{
+public:
+    using type = std::tuple<std::string, std::string, OpticalFlowParameters, size_t, size_t>;
+
+    struct iterator
+    {
+        iterator(std::vector<std::string>::const_iterator           old_image_it,
+                 std::vector<std::string>::const_iterator           new_image_it,
+                 std::vector<OpticalFlowParameters>::const_iterator params_it,
+                 std::vector<size_t>::const_iterator                num_levels_it,
+                 std::vector<size_t>::const_iterator                num_keypoints_it)
+            : _old_image_it{ std::move(old_image_it) },
+              _new_image_it{ std::move(new_image_it) },
+              _params_it{ std::move(params_it) },
+              _num_levels_it{ std::move(num_levels_it) },
+              _num_keypoints_it{ std::move(num_keypoints_it) }
+        {
+        }
+
+        std::string description() const
+        {
+            std::stringstream description;
+            description << "NumLevels=" << *_num_levels_it << ":";
+            description << "NumKeypoints=" << *_num_keypoints_it << ":";
+            description << "Termination=" << _params_it->termination << ":";
+            description << "Epsilon=" << _params_it->epsilon << ":";
+            description << "NumIterations=" << _params_it->num_iterations << ":";
+            description << "WindowDimension=" << _params_it->window_dimension << ":";
+            description << "InitialEstimate=" << std::boolalpha << _params_it->use_initial_estimate;
+
+            return description.str();
+        }
+
+        OpticalFlowDataset::type operator*() const
+        {
+            return std::make_tuple(*_old_image_it, *_new_image_it, *_params_it, *_num_levels_it, *_num_keypoints_it);
+        }
+
+        iterator &operator++()
+        {
+            ++_old_image_it;
+            ++_new_image_it;
+            ++_params_it;
+            ++_num_levels_it;
+            ++_num_keypoints_it;
+
+            return *this;
+        }
+
+    private:
+        std::vector<std::string>::const_iterator           _old_image_it;
+        std::vector<std::string>::const_iterator           _new_image_it;
+        std::vector<OpticalFlowParameters>::const_iterator _params_it;
+        std::vector<size_t>::const_iterator                _num_levels_it;
+        std::vector<size_t>::const_iterator                _num_keypoints_it;
+    };
+
+    iterator begin() const
+    {
+        return iterator(_old_image.begin(),
+                        _new_image.begin(),
+                        _params.begin(),
+                        _num_levels.begin(),
+                        _num_keypoints.begin());
+    }
+
+    int size() const
+    {
+        return std::min(_old_image.size(), std::min(_new_image.size(), std::min(_params.size(), std::min(_num_levels.size(), _num_keypoints.size()))));
+    }
+
+    void add_config(std::string old_image, std::string new_image, OpticalFlowParameters params, size_t num_levels, size_t num_keypoints)
+    {
+        _old_image.emplace_back(std::move(old_image));
+        _new_image.emplace_back(std::move(new_image));
+        _params.emplace_back(params);
+        _num_levels.emplace_back(num_levels);
+        _num_keypoints.emplace_back(num_keypoints);
+    }
+
+protected:
+    OpticalFlowDataset()                      = default;
+    OpticalFlowDataset(OpticalFlowDataset &&) = default;
+
+private:
+    std::vector<std::string>           _old_image{};
+    std::vector<std::string>           _new_image{};
+    std::vector<OpticalFlowParameters> _params{};
+    std::vector<size_t>                _num_levels{};
+    std::vector<size_t>                _num_keypoints{};
+};
+
+// *INDENT-OFF*
+// clang-format off
+class SmallOpticalFlowDataset final : public OpticalFlowDataset
+{
+public:
+    SmallOpticalFlowDataset()
+    {
+        //         old_image              new_image              (termination, epsilon, num_iterations, window_dimension, initial_estimate) levels keypoints
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_BOTH,       0.01f, 3, 5, true), 3, 1000);
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_EPSILON,    0.01f, 3, 5, true), 3, 1000);
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_ITERATIONS, 0.01f, 3, 5, true), 3, 1000);
+    }
+};
+
+class LargeOpticalFlowDataset final : public OpticalFlowDataset
+{
+public:
+    LargeOpticalFlowDataset()
+    {
+        //         old_image              new_image              (termination, epsilon, num_iterations, window_dimension, initial_estimate) levels keypoints
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_BOTH,       0.01f, 3, 5, true), 3, 10000);
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_EPSILON,    0.01f, 3, 5, true), 3, 10000);
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_ITERATIONS, 0.01f, 3, 5, true), 3, 10000);
+
+        //         old_image              new_image              (termination, epsilon, num_iterations, window_dimension, initial_estimate) levels keypoints
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_BOTH,       0.01f, 3, 5, false), 3, 10000);
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_EPSILON,    0.01f, 3, 5, false), 3, 10000);
+        add_config("opticalflow_old.pgm", "opticalflow_new.pgm", OpticalFlowParameters(Termination::TERM_CRITERIA_ITERATIONS, 0.01f, 3, 5, false), 3, 10000);
+    }
+};
+// clang-format on
+// *INDENT-ON*
+
+} // namespace datasets
+} // namespace test
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_TEST_OPTICAL_FLOW_DATASET */