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>

1 files changed, 152 insertions, 0 deletions

diff --git a/tests/validation/reference/Sobel.cpp b/tests/validation/reference/Sobel.cpp
new file mode 100644
index 0000000000..ff0e11d3a8
--- /dev/null
+++ b/tests/validation/reference/Sobel.cpp
@@ -0,0 +1,152 @@
+/*
+ * 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 "Sobel.h"
+
+#include "Utils.h"
+#include "tests/validation/Helpers.h"
+
+#include <array>
+#include <map>
+#include <utility>
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+namespace
+{
+const std::array<int8_t, 9> sobel_3_x{ { -1, 0, 1, -2, 0, 2, -1, 0, 1 } };
+const std::array<int8_t, 9> sobel_3_y{ { -1, -2, -1, 0, 0, 0, 1, 2, 1 } };
+
+const std::array<int8_t, 25> sobel_5_x{ {
+        -1, -2, 0, 2, 1,
+        -4, -8, 0, 8, 4,
+        -6, -12, 0, 12, 6,
+        -4, -8, 0, 8, 4,
+        -1, -2, 0, 2, 1
+    } };
+
+const std::array<int8_t, 25> sobel_5_y{ {
+        -1, -4, -6, -4, -1,
+        -2, -8, -12, -8, -2,
+        0, 0, 0, 0, 0,
+        2, 8, 12, 8, 2,
+        1, 4, 6, 4, 1
+    } };
+
+const std::array<int8_t, 49> sobel_7_x{ {
+        -1, -4, -5, 0, 5, 4, 1,
+        -6, -24, -30, 0, 30, 24, 6,
+        -15, -60, -75, 0, 75, 60, 15,
+        -20, -80, -100, 0, 100, 80, 20,
+        -15, -60, -75, 0, 75, 60, 15,
+        -6, -24, -30, 0, 30, 24, 6,
+        -1, -4, -5, 0, 5, 4, 1
+    } };
+
+const std::array<int8_t, 49> sobel_7_y{ {
+        -1, -6, -15, -20, -15, -6, -1,
+        -4, -24, -60, -80, -60, -24, -4,
+        -5, -30, -75, -100, -75, -30, -5,
+        0, 0, 0, 0, 0, 0, 0,
+        5, 30, 75, 100, 75, 30, 5,
+        4, 24, 60, 80, 60, 24, 4,
+        1, 6, 15, 20, 15, 6, 1
+    } };
+
+const std::map<int, std::pair<const int8_t *, const int8_t *>> masks
+{
+    { 3, { sobel_3_x.data(), sobel_3_y.data() } },
+    { 5, { sobel_5_x.data(), sobel_5_y.data() } },
+    { 7, { sobel_7_x.data(), sobel_7_y.data() } },
+};
+
+template <typename T>
+struct data_type;
+
+template <>
+struct data_type<int16_t>
+{
+    const static DataType value = DataType::S16;
+};
+
+template <>
+struct data_type<int>
+{
+    const static DataType value = DataType::S32;
+};
+} // namespace
+
+template <typename T, typename U>
+std::pair<SimpleTensor<T>, SimpleTensor<T>> sobel(const SimpleTensor<U> &src, int filter_size, BorderMode border_mode, uint8_t constant_border_value, GradientDimension gradient_dimension)
+{
+    SimpleTensor<T> dst_x(src.shape(), data_type<T>::value, src.num_channels());
+    SimpleTensor<T> dst_y(src.shape(), data_type<T>::value, src.num_channels());
+
+    ValidRegion valid_region = shape_to_valid_region(src.shape(), border_mode == BorderMode::UNDEFINED, BorderSize(filter_size / 2));
+
+    for(int i = 0; i < src.num_elements(); ++i)
+    {
+        Coordinates coord = index2coord(src.shape(), i);
+
+        if(!is_in_valid_region(valid_region, coord))
+        {
+            continue;
+        }
+        switch(gradient_dimension)
+        {
+            case GradientDimension::GRAD_X:
+                apply_2d_spatial_filter(coord, src, dst_x, TensorShape{ static_cast<unsigned int>(filter_size), static_cast<unsigned int>(filter_size) }, masks.at(filter_size).first, 1.f, border_mode,
+                                        constant_border_value);
+                break;
+            case GradientDimension::GRAD_Y:
+                apply_2d_spatial_filter(coord, src, dst_y, TensorShape{ static_cast<unsigned int>(filter_size), static_cast<unsigned int>(filter_size) }, masks.at(filter_size).second, 1.f, border_mode,
+                                        constant_border_value);
+                break;
+            case GradientDimension::GRAD_XY:
+                apply_2d_spatial_filter(coord, src, dst_x, TensorShape{ static_cast<unsigned int>(filter_size), static_cast<unsigned int>(filter_size) }, masks.at(filter_size).first, 1.f, border_mode,
+                                        constant_border_value);
+                apply_2d_spatial_filter(coord, src, dst_y, TensorShape{ static_cast<unsigned int>(filter_size), static_cast<unsigned int>(filter_size) }, masks.at(filter_size).second, 1.f, border_mode,
+                                        constant_border_value);
+                break;
+            default:
+                ARM_COMPUTE_ERROR("Gradient dimension not supported");
+        }
+    }
+
+    return std::make_pair(dst_x, dst_y);
+}
+
+template std::pair<SimpleTensor<int16_t>, SimpleTensor<int16_t>> sobel(const SimpleTensor<uint8_t> &src, int filter_size, BorderMode border_mode, uint8_t constant_border_value,
+                                                                       GradientDimension gradient_dimension);
+template std::pair<SimpleTensor<int>, SimpleTensor<int>> sobel(const SimpleTensor<uint8_t> &src, int filter_size, BorderMode border_mode, uint8_t constant_border_value,
+                                                               GradientDimension gradient_dimension);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute