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Diffstat (limited to 'src/core/CL/cl_kernels/convolution3x3.cl')
-rw-r--r-- | src/core/CL/cl_kernels/convolution3x3.cl | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/core/CL/cl_kernels/convolution3x3.cl b/src/core/CL/cl_kernels/convolution3x3.cl new file mode 100644 index 0000000000..3733d0c733 --- /dev/null +++ b/src/core/CL/cl_kernels/convolution3x3.cl @@ -0,0 +1,138 @@ +/* + * 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 + +#ifndef DATA_TYPE_OUT +#define DATA_TYPE_OUT uchar +#endif + +/** 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 |