COMPMID-584: Add validation to channel_combine kernels

Change-Id: I67fe3fcea08704d9f4b04d22fe34db83b2697b87
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/110562
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>

1 files changed, 201 insertions, 0 deletions

diff --git a/tests/validation/reference/ChannelCombine.cpp b/tests/validation/reference/ChannelCombine.cpp
new file mode 100644
index 0000000000..c1ec3ec578
--- /dev/null
+++ b/tests/validation/reference/ChannelCombine.cpp
@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2017-2018 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.
+ */
+#include "ChannelCombine.h"
+
+#include "arm_compute/core/Types.h"
+#include "tests/validation/FixedPoint.h"
+#include "tests/validation/Helpers.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+namespace
+{
+template <typename T>
+inline std::vector<SimpleTensor<T>> create_image_planes(const TensorShape &shape, Format format)
+{
+    TensorShape image_shape = adjust_odd_shape(shape, format);
+
+    std::vector<SimpleTensor<T>> image_planes;
+
+    switch(format)
+    {
+        case Format::RGB888:
+        case Format::RGBA8888:
+        case Format::YUYV422:
+        case Format::UYVY422:
+        {
+            image_planes.emplace_back(image_shape, format);
+            break;
+        }
+        case Format::NV12:
+        case Format::NV21:
+        {
+            TensorShape shape_uv88 = calculate_subsampled_shape(image_shape, Format::UV88);
+
+            image_planes.emplace_back(image_shape, Format::U8);
+            image_planes.emplace_back(shape_uv88, Format::UV88);
+            break;
+        }
+        case Format::IYUV:
+        {
+            TensorShape shape_sub2 = calculate_subsampled_shape(image_shape, Format::IYUV);
+
+            image_planes.emplace_back(image_shape, Format::U8);
+            image_planes.emplace_back(shape_sub2, Format::U8);
+            image_planes.emplace_back(shape_sub2, Format::U8);
+            break;
+        }
+        case Format::YUV444:
+        {
+            image_planes.emplace_back(image_shape, Format::U8);
+            image_planes.emplace_back(image_shape, Format::U8);
+            image_planes.emplace_back(image_shape, Format::U8);
+            break;
+        }
+        default:
+            ARM_COMPUTE_ERROR("Not supported");
+            break;
+    }
+
+    return image_planes;
+}
+} // namespace
+
+template <typename T>
+std::vector<SimpleTensor<T>> channel_combine(const TensorShape &shape, const std::vector<SimpleTensor<T>> &image_planes, Format format)
+{
+    std::vector<SimpleTensor<T>> dst = create_image_planes<T>(shape, format);
+
+    for(unsigned int plane_idx = 0; plane_idx < dst.size(); ++plane_idx)
+    {
+        SimpleTensor<T> &dst_tensor = dst[plane_idx];
+
+        for(int element_idx = 0; element_idx < dst_tensor.num_elements(); ++element_idx)
+        {
+            Coordinates coord = index2coord(dst_tensor.shape(), element_idx);
+
+            switch(format)
+            {
+                case Format::RGB888:
+                case Format::RGBA8888:
+                {
+                    // Copy R/G/B or A channel
+                    for(int channel_idx = 0; channel_idx < dst_tensor.num_channels(); ++channel_idx)
+                    {
+                        const T &src_value = reinterpret_cast<const T *>(image_planes[channel_idx](coord))[0];
+                        T       &dst_value = reinterpret_cast<T *>(dst_tensor(coord))[channel_idx];
+
+                        dst_value = src_value;
+                    }
+                    break;
+                }
+                case Format::YUYV422:
+                case Format::UYVY422:
+                {
+                    // Find coordinates of the sub-sampled pixel
+                    const Coordinates coord_hori(coord.x() / 2, coord.y());
+
+                    const T &src0 = reinterpret_cast<const T *>(image_planes[0](coord))[0];
+                    const T &src1 = reinterpret_cast<const T *>(image_planes[1](coord_hori))[0];
+
+                    const int shift = (Format::YUYV422 == format) ? 1 : 0;
+                    T        &dst0  = reinterpret_cast<T *>(dst_tensor(coord))[1 - shift];
+                    T        &dst1  = reinterpret_cast<T *>(dst_tensor(coord))[0 + shift];
+
+                    dst0 = src0;
+                    dst1 = src1;
+
+                    Coordinates coord2 = index2coord(dst_tensor.shape(), ++element_idx);
+
+                    const T &src2 = reinterpret_cast<const T *>(image_planes[0](coord2))[0];
+                    const T &src3 = reinterpret_cast<const T *>(image_planes[2](coord_hori))[0];
+
+                    T &dst2 = reinterpret_cast<T *>(dst_tensor(coord2))[1 - shift];
+                    T &dst3 = reinterpret_cast<T *>(dst_tensor(coord2))[0 + shift];
+
+                    dst2 = src2;
+                    dst3 = src3;
+
+                    break;
+                }
+                case Format::NV12:
+                case Format::NV21:
+                {
+                    if(0U == plane_idx)
+                    {
+                        // Get and combine Y channel from plane0 of destination multi-image
+                        dst_tensor[element_idx] = image_planes[0][element_idx];
+                    }
+                    else
+                    {
+                        const int shift = (Format::NV12 == format) ? 0 : 1;
+
+                        // Get U channel from plane1 and V channel from plane2 of the source
+                        const T &src_u0 = reinterpret_cast<const T *>(image_planes[1](coord))[0];
+                        const T &src_v0 = reinterpret_cast<const T *>(image_planes[2](coord))[0];
+
+                        // Get U and V channel from plane1 of destination multi-image
+                        T &dst_u0 = reinterpret_cast<T *>(dst_tensor(coord))[0 + shift];
+                        T &dst_v0 = reinterpret_cast<T *>(dst_tensor(coord))[1 - shift];
+
+                        // Combine channel U and V
+                        dst_u0 = src_u0;
+                        dst_v0 = src_v0;
+                    }
+
+                    break;
+                }
+                case Format::IYUV:
+                case Format::YUV444:
+                {
+                    // Get Y/U/V element
+                    const T &src = reinterpret_cast<const T *>(image_planes[plane_idx](coord))[0];
+                    T       &dst = reinterpret_cast<T *>(dst_tensor(coord))[0];
+
+                    // Copy Y/U/V plane
+                    dst = src;
+
+                    break;
+                }
+                default:
+                    ARM_COMPUTE_ERROR("Not supported");
+                    break;
+            }
+        }
+    }
+
+    return dst;
+}
+
+template std::vector<SimpleTensor<uint8_t>> channel_combine(const TensorShape &shape, const std::vector<SimpleTensor<uint8_t>> &image_planes, Format format);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute