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/*
* Copyright (c) 2017-2020 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/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
#if defined(_OPENMP)
#pragma omp parallel for collapse(2)
#endif /* _OPENMP */
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]; // NOLINT
}
}
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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