| /* |
| * 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 "helpers.h" |
| |
| #ifndef DATA_TYPE |
| #define DATA_TYPE short |
| #endif /* DATA_TYPE */ |
| |
| #ifndef DATA_TYPE_OUT |
| #define DATA_TYPE_OUT uchar |
| #endif /* DATA_TYPE_OUT */ |
| |
| /** Compute a 1D horizontal convolution of size 3 for 8 bytes assuming the input is made of 1 channel of 1 byte (i.e 8 pixels). |
| * |
| * @param[in] left_pixel Pointer to the left pixel. |
| * @param[in] left_coeff Weight of the left pixel |
| * @param[in] middle_coeff Weight of the middle pixel |
| * @param[in] right_coeff Weight of the right pixel |
| * |
| * @return a short8 containing 8 convoluted values. |
| */ |
| inline VEC_DATA_TYPE(DATA_TYPE, 8) convolution1x3(__global const uchar *left_pixel, |
| const short left_coeff, |
| const short middle_coeff, |
| const short right_coeff) |
| { |
| uchar16 temp = vload16(0, left_pixel); |
| VEC_DATA_TYPE(DATA_TYPE, 8) |
| left = CONVERT(temp.s01234567, VEC_DATA_TYPE(DATA_TYPE, 8)); |
| VEC_DATA_TYPE(DATA_TYPE, 8) |
| middle = CONVERT(temp.s12345678, VEC_DATA_TYPE(DATA_TYPE, 8)); |
| VEC_DATA_TYPE(DATA_TYPE, 8) |
| right = CONVERT(temp.s23456789, VEC_DATA_TYPE(DATA_TYPE, 8)); |
| |
| return left * (VEC_DATA_TYPE(DATA_TYPE, 8))left_coeff + middle * (VEC_DATA_TYPE(DATA_TYPE, 8))middle_coeff + right * (VEC_DATA_TYPE(DATA_TYPE, 8))right_coeff; |
| } |
| |
| /** Apply a 3x3 convolution matrix to a single channel U8 input image and return the result. |
| * |
| * Convolution matrix layout: |
| * |
| * [ mat0, mat1, mat2 ]\n |
| * [ mat3, mat4, mat5 ]\n |
| * [ mat6, mat7, mat8 ]\n |
| * |
| * @param[in] src A pointer to source Image structure |
| * @param[in] mat0 Coefficient from the convolution matrix |
| * @param[in] mat1 Coefficient from the convolution matrix |
| * @param[in] mat2 Coefficient from the convolution matrix |
| * @param[in] mat3 Coefficient from the convolution matrix |
| * @param[in] mat4 Coefficient from the convolution matrix |
| * @param[in] mat5 Coefficient from the convolution matrix |
| * @param[in] mat6 Coefficient from the convolution matrix |
| * @param[in] mat0 Coefficient from the convolution matrix |
| * @param[in] mat7 Coefficient from the convolution matrix |
| * @param[in] mat8 Coefficient from the convolution matrix |
| * @param[in] scale Convolution matrix scale (Sum of the coefficients, or 1 if the sum is 0) |
| * |
| * @return a short8 containing 8 convoluted and scaled values. |
| */ |
| inline VEC_DATA_TYPE(DATA_TYPE, 8) convolution3x3( |
| Image *src, |
| const short mat0, const short mat1, const short mat2, |
| const short mat3, const short mat4, const short mat5, |
| const short mat6, const short mat7, const short mat8, uint scale) |
| { |
| // Output pixels |
| VEC_DATA_TYPE(DATA_TYPE, 8) |
| pixels; |
| |
| // Row 0 |
| pixels = convolution1x3(offset(src, -1, -1), mat0, mat1, mat2); |
| // Row |
| pixels += convolution1x3(offset(src, -1, 0), mat3, mat4, mat5); |
| // Row 2 |
| pixels += convolution1x3(offset(src, -1, 1), mat6, mat7, mat8); |
| |
| // Divide by the scale |
| return pixels / (VEC_DATA_TYPE(DATA_TYPE, 8))scale; |
| } |
| |
| #ifndef DYNAMIC_MATRIX_CONVOLUTION |
| |
| /** Apply a 3x3 static convolution matrix to a single channel U8 input image and output a single channel image. |
| * |
| * @attention The matrix coefficients(MAT0, MAT1, ... MAT8, SCALE), DATA_TYPE, and DATA_TYPE_OUT need to be passed at compile time.\n |
| * e.g. -DMAT0=1 -DMAT2=2, ...-DMAT8=8, -DSCALE=1, -DDATA_TYPE=int, -DDATA_TYPE_OUT=int |
| * |
| * @param[in] src_ptr Pointer to the source image |
| * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8, S16 |
| * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| */ |
| __kernel void convolution3x3_static( |
| IMAGE_DECLARATION(src), |
| IMAGE_DECLARATION(dst)) |
| { |
| Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| |
| VEC_DATA_TYPE(DATA_TYPE, 8) |
| pixels = convolution3x3(&src, |
| MAT0, MAT1, MAT2, MAT3, MAT4, MAT5, MAT6, MAT7, MAT8, SCALE); |
| |
| // Store the result as is in dst |
| vstore8(CONVERT_SAT(pixels, VEC_DATA_TYPE(DATA_TYPE_OUT, 8)), 0, (__global DATA_TYPE_OUT *)dst.ptr); |
| } |
| |
| #endif // DYNAMIC_MATRIX_CONVOLUTION |
