67 lines
2.5 KiB
C++
67 lines
2.5 KiB
C++
/*
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* Copyright (c) 2017 Arm Limited.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "Phase.h"
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namespace arm_compute
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{
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namespace test
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{
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namespace validation
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{
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namespace reference
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{
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template <typename T>
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SimpleTensor<uint8_t> phase(const SimpleTensor<T> &gx, const SimpleTensor<T> &gy, PhaseType phase_type)
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{
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const float PI = std::atan(1) * 4;
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SimpleTensor<uint8_t> phase(gx.shape(), DataType::U8);
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if(phase_type == PhaseType::UNSIGNED) // unsigned: map to [0-255)
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{
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for(int i = 0; i < gx.num_elements(); ++i)
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{
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float angle_deg = (std::atan2(float(gy[i]), float(gx[i])) / PI) * 180.0f;
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phase[i] = (angle_deg < 0.0f) ? 180.f + angle_deg : angle_deg;
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}
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}
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else // signed: map to [0-180) degrees
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{
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for(int i = 0; i < gx.num_elements(); ++i)
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{
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float angle_pi = std::atan2(gy[i], gx[i]) / PI;
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angle_pi = (angle_pi < 0.0f) ? 2 + angle_pi : angle_pi;
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phase[i] = lround(angle_pi * 128) & 0xFFu;
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}
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}
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return phase;
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}
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template SimpleTensor<uint8_t> phase(const SimpleTensor<int16_t> &gx, const SimpleTensor<int16_t> &gy, PhaseType phase_type);
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template SimpleTensor<uint8_t> phase(const SimpleTensor<int32_t> &gx, const SimpleTensor<int32_t> &gy, PhaseType phase_type);
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} // namespace reference
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} // namespace validation
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} // namespace test
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} // namespace arm_compute
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