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/*
* 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 "Phase.h"
namespace arm_compute
{
namespace test
{
namespace validation
{
namespace reference
{
template <typename T>
SimpleTensor<uint8_t> phase(const SimpleTensor<T> &gx, const SimpleTensor<T> &gy, PhaseType phase_type)
{
const float PI = std::atan(1) * 4;
SimpleTensor<uint8_t> phase(gx.shape(), DataType::U8);
if(phase_type == PhaseType::UNSIGNED) // unsigned: map to [0-255)
{
for(int i = 0; i < gx.num_elements(); ++i)
{
float angle_deg = (std::atan2(float(gy[i]), float(gx[i])) / PI) * 180.0f;
phase[i] = (angle_deg < 0.0f) ? 180.f + angle_deg : angle_deg;
}
}
else // signed: map to [0-180) degrees
{
for(int i = 0; i < gx.num_elements(); ++i)
{
float angle_pi = std::atan2(gy[i], gx[i]) / PI;
angle_pi = (angle_pi < 0.0f) ? 2 + angle_pi : angle_pi;
phase[i] = lround(angle_pi * 128) & 0xFFu;
}
}
return phase;
}
template SimpleTensor<uint8_t> phase(const SimpleTensor<int16_t> &gx, const SimpleTensor<int16_t> &gy, PhaseType phase_type);
template SimpleTensor<uint8_t> phase(const SimpleTensor<int32_t> &gx, const SimpleTensor<int32_t> &gy, PhaseType phase_type);
} // namespace reference
} // namespace validation
} // namespace test
} // namespace arm_compute
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