From 9414f64c231a013664102e2c284b10266c6b4d4e Mon Sep 17 00:00:00 2001
From: Ioan-Cristian Szabo <ioan-cristian.szabo@arm.com>
Date: Fri, 27 Oct 2017 17:35:40 +0100
Subject: COMPMID-582: Add validation to channel_extract kernels.

Change-Id: I5022d02f06f9d849dad76e3d9b8e48632c236429
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/121191
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
---
 tests/validation/reference/ChannelExtract.cpp | 76 +++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 tests/validation/reference/ChannelExtract.cpp

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

diff --git a/tests/validation/reference/ChannelExtract.cpp b/tests/validation/reference/ChannelExtract.cpp
new file mode 100644
index 0000000000..595bb13098
--- /dev/null
+++ b/tests/validation/reference/ChannelExtract.cpp
@@ -0,0 +1,76 @@
+/*
+ * 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 "ChannelExtract.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
+{
+template <typename T>
+SimpleTensor<uint8_t> channel_extract(const TensorShape &shape, const std::vector<SimpleTensor<T>> &tensor_planes, Format format, Channel channel)
+{
+    // Find plane and channel index
+    const unsigned int plane_idx   = plane_idx_from_channel(format, channel);
+    const unsigned int channel_idx = channel_idx_from_format(format, channel);
+
+    // Create dst and get src tensor
+    SimpleTensor<T> src = tensor_planes[plane_idx];
+    SimpleTensor<T> dst{ calculate_subsampled_shape(shape, format, channel), Format::U8 };
+
+    // Single planar formats with subsampling require a double horizontal step
+    const int step_x = ((Format::YUYV422 == format || Format::UYVY422 == format) && Channel::Y != channel) ? 2 : 1;
+    const int width  = dst.shape().x();
+    const int height = dst.shape().y();
+
+    // Loop over each pixel and extract channel
+    for(int y = 0; y < height; ++y)
+    {
+        for(int x = 0; x < width; ++x)
+        {
+            const Coordinates src_coord{ x * step_x, y };
+            const Coordinates dst_coord{ x, y };
+
+            const auto *src_pixel = reinterpret_cast<const T *>(src(src_coord));
+            auto       *dst_pixel = reinterpret_cast<T *>(dst(dst_coord));
+
+            dst_pixel[0] = src_pixel[channel_idx];
+        }
+    }
+
+    return dst;
+}
+
+template SimpleTensor<uint8_t> channel_extract(const TensorShape &shape, const std::vector<SimpleTensor<uint8_t>> &tensor_planes, Format format, Channel channel);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
-- 
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