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Diffstat (limited to 'src/core/CL/cl_kernels/integral_image.cl')
| -rw-r--r-- | src/core/CL/cl_kernels/integral_image.cl | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/core/CL/cl_kernels/integral_image.cl b/src/core/CL/cl_kernels/integral_image.cl new file mode 100644 index 0000000000..970e04e150 --- /dev/null +++ b/src/core/CL/cl_kernels/integral_image.cl @@ -0,0 +1,100 @@ +/* + * 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" + +/** This function computes the horizontal integral of the image. + * + * @param[in] src_ptr Pointer to the source image. Supported data types: U8 + * @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: U32 + * @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 integral_horizontal( + IMAGE_DECLARATION(src), + IMAGE_DECLARATION(dst)) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); + Image dst = CONVERT_TO_IMAGE_STRUCT(dst); + + uint prev = 0; + + for(uint j = 0; j < src_step_x; j += 16) + { + barrier(CLK_GLOBAL_MEM_FENCE); + uint16 res = convert_uint16(vload16(0, offset(&src, j, 0))); + res.s0 += prev; + res.s1 += res.s0; + res.s2 += res.s1; + res.s3 += res.s2; + res.s4 += res.s3; + res.s5 += res.s4; + res.s6 += res.s5; + res.s7 += res.s6; + res.s8 += res.s7; + res.s9 += res.s8; + res.sA += res.s9; + res.sB += res.sA; + res.sC += res.sB; + res.sD += res.sC; + res.sE += res.sD; + res.sF += res.sE; + prev = res.sF; + vstore16(res, 0, (__global uint *)offset(&dst, j, 0)); + } +} + +/** This function computes the vertical integral of the image. + * + * @param[in,out] src_ptr Pointer to the source image. Supported data types: U32 + * @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[in] height Image height. + */ +__kernel void integral_vertical( + IMAGE_DECLARATION(src), + uint height) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); + + uint8 prev = vload8(0, (__global uint *)offset(&src, 0, 0)); + for(uint j = 1; j < height; ++j) + { + barrier(CLK_GLOBAL_MEM_FENCE); + uint8 res = vload8(0, (__global uint *)offset(&src, 0, j)); + res += prev; + vstore8(res, 0, (__global uint *)offset(&src, 0, j)); + prev = res; + } +} |