From 5a7e776eee2e9147eab12631f5717847fb6cac5c Mon Sep 17 00:00:00 2001
From: Georgios Pinitas <georgios.pinitas@arm.com>
Date: Fri, 1 Dec 2017 16:27:29 +0000
Subject: COMPMID-556: Rename CPP folder to reference

Change-Id: I147644349547c4e3804a80b564a9ad95131ad2d0
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/111560
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Tested-by: BSG Visual Compute Jenkins server to access repositories on http://mpd-gerrit.cambridge.arm.com <bsgcomp@arm.com>
---
 tests/validation/reference/NonLinearFilter.cpp | 104 +++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 tests/validation/reference/NonLinearFilter.cpp

(limited to 'tests/validation/reference/NonLinearFilter.cpp')

diff --git a/tests/validation/reference/NonLinearFilter.cpp b/tests/validation/reference/NonLinearFilter.cpp
new file mode 100644
index 0000000000..8669c9c776
--- /dev/null
+++ b/tests/validation/reference/NonLinearFilter.cpp
@@ -0,0 +1,104 @@
+/*
+ * 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 src 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 src 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. src NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER src AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * dst OF OR src CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "NonLinearFilter.h"
+#include "Utils.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+template <typename T>
+SimpleTensor<T> non_linear_filter(const SimpleTensor<T> &src, NonLinearFilterFunction function, unsigned int mask_size, MatrixPattern pattern, const uint8_t *mask, BorderMode border_mode,
+                                  uint8_t constant_border_value)
+{
+    SimpleTensor<T> dst(src.shape(), src.data_type());
+
+    ARM_COMPUTE_ERROR_ON(pattern == MatrixPattern::OTHER && mask == nullptr);
+    ARM_COMPUTE_UNUSED(pattern);
+
+    using intermediate_type = typename common_promoted_signed_type<T>::intermediate_type;
+
+    const int                      sq_mask_size   = mask_size * mask_size;
+    const int                      half_mask_size = mask_size / 2;
+    std::vector<intermediate_type> vals(sq_mask_size);
+    intermediate_type              current_value = 0;
+
+    const ValidRegion valid_region = shape_to_valid_region(src.shape(), border_mode == BorderMode::UNDEFINED, BorderSize(half_mask_size));
+
+    for(int element_idx = 0, count = 0, index = 0; element_idx < src.num_elements(); ++element_idx, count = 0, index = 0)
+    {
+        Coordinates id = index2coord(src.shape(), element_idx);
+        if(is_in_valid_region(valid_region, id))
+        {
+            int idx = id.x();
+            int idy = id.y();
+            for(int y = idy - half_mask_size; y <= idy + half_mask_size; ++y)
+            {
+                for(int x = idx - half_mask_size; x <= idx + half_mask_size; ++x, ++index)
+                {
+                    id.set(0, x);
+                    id.set(1, y);
+                    current_value = tensor_elem_at(src, id, border_mode, constant_border_value);
+
+                    if(mask[index] == 255)
+                    {
+                        vals[count] = static_cast<intermediate_type>(current_value);
+                        ++count;
+                    }
+                }
+            }
+            std::sort(vals.begin(), vals.begin() + count);
+
+            ARM_COMPUTE_ERROR_ON(count == 0);
+
+            switch(function)
+            {
+                case NonLinearFilterFunction::MIN:
+                    dst[element_idx] = saturate_cast<T>(vals[0]);
+                    break;
+                case NonLinearFilterFunction::MAX:
+                    dst[element_idx] = saturate_cast<T>(vals[count - 1]);
+                    break;
+                case NonLinearFilterFunction::MEDIAN:
+                    dst[element_idx] = saturate_cast<T>(vals[count / 2]);
+                    break;
+                default:
+                    ARM_COMPUTE_ERROR("Unsupported NonLinearFilter function.");
+            }
+        }
+    }
+
+    return dst;
+}
+
+template SimpleTensor<uint8_t> non_linear_filter(const SimpleTensor<uint8_t> &src, NonLinearFilterFunction function, unsigned int mask_size, MatrixPattern pattern, const uint8_t *mask,
+                                                 BorderMode border_mode, uint8_t constant_border_value);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
-- 
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