| /* |
| * 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 |