| /* |
| * Copyright (c) 2016, 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 "arm_compute/core/NEON/kernels/NESobel3x3Kernel.h" |
| |
| #include "arm_compute/core/Coordinates.h" |
| #include "arm_compute/core/Error.h" |
| #include "arm_compute/core/Helpers.h" |
| #include "arm_compute/core/ITensor.h" |
| #include "arm_compute/core/Types.h" |
| #include "arm_compute/core/Validate.h" |
| |
| #include <arm_neon.h> |
| #include <cstdint> |
| |
| using namespace arm_compute; |
| |
| NESobel3x3Kernel::NESobel3x3Kernel() |
| : _run_sobel_x(false), _run_sobel_y(false), _input(nullptr), _output_x(nullptr), _output_y(nullptr) |
| { |
| } |
| |
| BorderSize NESobel3x3Kernel::border_size() const |
| { |
| return BorderSize(1); |
| } |
| |
| void NESobel3x3Kernel::configure(const ITensor *input, ITensor *output_x, ITensor *output_y, bool border_undefined) |
| { |
| ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8); |
| ARM_COMPUTE_ERROR_ON((output_x == nullptr) && (output_y == nullptr)); |
| |
| _run_sobel_x = output_x != nullptr; |
| _run_sobel_y = output_y != nullptr; |
| |
| if(_run_sobel_x) |
| { |
| ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output_x, 1, DataType::S16); |
| } |
| |
| if(_run_sobel_y) |
| { |
| ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output_y, 1, DataType::S16); |
| } |
| |
| _input = input; |
| _output_x = output_x; |
| _output_y = output_y; |
| |
| // Configure kernel window |
| constexpr unsigned int num_elems_processed_per_iteration = 8; |
| constexpr unsigned int num_elems_read_per_iteration = 16; |
| constexpr unsigned int num_elems_written_per_iteration = 8; |
| constexpr unsigned int num_rows_read_per_iteration = 3; |
| |
| Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size()); |
| AccessWindowHorizontal output_x_access(output_x == nullptr ? nullptr : output_x->info(), 0, num_elems_written_per_iteration); |
| AccessWindowHorizontal output_y_access(output_y == nullptr ? nullptr : output_y->info(), 0, num_elems_written_per_iteration); |
| |
| update_window_and_padding(win, |
| AccessWindowRectangle(input->info(), -border_size().left, -border_size().top, num_elems_read_per_iteration, num_rows_read_per_iteration), |
| output_x_access, |
| output_y_access); |
| |
| output_x_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size()); |
| output_y_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size()); |
| |
| INEKernel::configure(win); |
| } |
| |
| void NESobel3x3Kernel::run(const Window &window, const ThreadInfo &info) |
| { |
| ARM_COMPUTE_UNUSED(info); |
| ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this); |
| ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INEKernel::window(), window); |
| |
| const unsigned char *const input_top_ptr = _input->ptr_to_element(Coordinates(-1, -1)); |
| const unsigned char *const input_mid_ptr = _input->ptr_to_element(Coordinates(-1, 0)); |
| const unsigned char *const input_bot_ptr = _input->ptr_to_element(Coordinates(-1, 1)); |
| |
| Iterator input(_input, window); |
| Iterator output_y; |
| Iterator output_x; |
| |
| if(_run_sobel_y) |
| { |
| output_y = Iterator(_output_y, window); |
| } |
| |
| if(_run_sobel_x) |
| { |
| output_x = Iterator(_output_x, window); |
| } |
| |
| static const int16x8_t two = vdupq_n_s16(2); |
| static const int16x8_t minustwo = vdupq_n_s16(-2); |
| |
| if(_run_sobel_y && _run_sobel_x) |
| { |
| execute_window_loop(window, [&](const Coordinates & id) |
| { |
| const uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset()); |
| const uint8x16_t mid_data = vld1q_u8(input_mid_ptr + input.offset()); |
| const uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset()); |
| |
| const int16x8x2_t top_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(top_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(top_data))) |
| } |
| }; |
| const int16x8x2_t mid_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(mid_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(mid_data))) |
| } |
| }; |
| const int16x8x2_t bot_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(bot_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(bot_data))) |
| } |
| }; |
| |
| //SOBEL Y |
| //top left |
| int16x8_t out_y = vnegq_s16(top_s16.val[0]); |
| //top mid |
| out_y = vmlaq_s16(out_y, vextq_s16(top_s16.val[0], top_s16.val[1], 1), minustwo); |
| //top right |
| out_y = vsubq_s16(out_y, vextq_s16(top_s16.val[0], top_s16.val[1], 2)); |
| //bot left |
| out_y = vaddq_s16(out_y, bot_s16.val[0]); |
| //bot mid |
| out_y = vmlaq_s16(out_y, vextq_s16(bot_s16.val[0], bot_s16.val[1], 1), two); |
| //bot right |
| out_y = vaddq_s16(out_y, vextq_s16(bot_s16.val[0], bot_s16.val[1], 2)); |
| |
| vst1q_s16(reinterpret_cast<int16_t *>(output_y.ptr()), out_y); |
| |
| //SOBEL X |
| //top left |
| int16x8_t out_x = vnegq_s16(top_s16.val[0]); |
| //top right |
| out_x = vaddq_s16(out_x, vextq_s16(top_s16.val[0], top_s16.val[1], 2)); |
| //mid left |
| out_x = vmlaq_s16(out_x, mid_s16.val[0], minustwo); |
| //mid right |
| out_x = vmlaq_s16(out_x, vextq_s16(mid_s16.val[0], mid_s16.val[1], 2), two); |
| //bot left |
| out_x = vsubq_s16(out_x, bot_s16.val[0]); |
| //bot right |
| out_x = vaddq_s16(out_x, vextq_s16(bot_s16.val[0], bot_s16.val[1], 2)); |
| |
| vst1q_s16(reinterpret_cast<int16_t *>(output_x.ptr()), out_x); |
| }, |
| input, output_x, output_y); |
| } |
| else if(_run_sobel_x) |
| { |
| execute_window_loop(window, [&](const Coordinates & id) |
| { |
| const uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset()); |
| const uint8x16_t mid_data = vld1q_u8(input_mid_ptr + input.offset()); |
| const uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset()); |
| |
| const int16x8x2_t top_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(top_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(top_data))) |
| } |
| }; |
| const int16x8x2_t mid_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(mid_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(mid_data))) |
| } |
| }; |
| const int16x8x2_t bot_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(bot_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(bot_data))) |
| } |
| }; |
| |
| //SOBEL X |
| //top left |
| int16x8_t out = vnegq_s16(top_s16.val[0]); |
| //top right |
| out = vaddq_s16(out, vextq_s16(top_s16.val[0], top_s16.val[1], 2)); |
| //mid left |
| out = vmlaq_s16(out, mid_s16.val[0], minustwo); |
| //mid right |
| out = vmlaq_s16(out, vextq_s16(mid_s16.val[0], mid_s16.val[1], 2), two); |
| //bot left |
| out = vsubq_s16(out, bot_s16.val[0]); |
| //bot right |
| out = vaddq_s16(out, vextq_s16(bot_s16.val[0], bot_s16.val[1], 2)); |
| |
| vst1q_s16(reinterpret_cast<int16_t *>(output_x.ptr()), out); |
| }, |
| input, output_x); |
| } |
| else if(_run_sobel_y) |
| { |
| execute_window_loop(window, [&](const Coordinates & id) |
| { |
| const uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset()); |
| const uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset()); |
| |
| const int16x8x2_t top_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(top_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(top_data))) |
| } |
| }; |
| const int16x8x2_t bot_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(bot_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(bot_data))) |
| } |
| }; |
| |
| //SOBEL Y |
| //top left |
| int16x8_t out = vnegq_s16(top_s16.val[0]); |
| //top mid |
| out = vmlaq_s16(out, vextq_s16(top_s16.val[0], top_s16.val[1], 1), minustwo); |
| //top right |
| out = vsubq_s16(out, vextq_s16(top_s16.val[0], top_s16.val[1], 2)); |
| //bot left |
| out = vaddq_s16(out, bot_s16.val[0]); |
| //bot mid |
| out = vmlaq_s16(out, vextq_s16(bot_s16.val[0], bot_s16.val[1], 1), two); |
| //bot right |
| out = vaddq_s16(out, vextq_s16(bot_s16.val[0], bot_s16.val[1], 2)); |
| |
| vst1q_s16(reinterpret_cast<int16_t *>(output_y.ptr()), out); |
| }, |
| input, output_y); |
| } |
| } |
