From 6ff3b19ee6120edf015fad8caab2991faa3070af Mon Sep 17 00:00:00 2001 From: Anthony Barbier Date: Mon, 4 Sep 2017 18:44:23 +0100 Subject: COMPMID-344 Updated doxygen Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae --- src/core/CL/cl_kernels/gaussian_pyramid.cl | 113 +++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 src/core/CL/cl_kernels/gaussian_pyramid.cl (limited to 'src/core/CL/cl_kernels/gaussian_pyramid.cl') diff --git a/src/core/CL/cl_kernels/gaussian_pyramid.cl b/src/core/CL/cl_kernels/gaussian_pyramid.cl new file mode 100644 index 0000000000..618937f36d --- /dev/null +++ b/src/core/CL/cl_kernels/gaussian_pyramid.cl @@ -0,0 +1,113 @@ +/* + * 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 "helpers.h" + +/** Computes the Gaussian Filter 1x5 + sub-sampling along the X direction + * + * @note Each thread computes 8 pixels + * + * @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: U16 + * @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 gaussian1x5_sub_x( + IMAGE_DECLARATION(src), + IMAGE_DECLARATION(dst)) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); + Image dst = CONVERT_TO_IMAGE_STRUCT(dst); + + // Load values for the convolution (20 bytes needed) + uchar16 temp0 = vload16(0, src.ptr); + uchar4 temp1 = vload4(0, src.ptr + 16); + + // Convert to USHORT8 + ushort8 l2_data = convert_ushort8((uchar8)(temp0.s02468ACE)); + ushort8 l1_data = convert_ushort8((uchar8)(temp0.s13579BDF)); + ushort8 m_data = convert_ushort8((uchar8)(temp0.s2468, temp0.sACE, temp1.s0)); + ushort8 r1_data = convert_ushort8((uchar8)(temp0.s3579, temp0.sBDF, temp1.s1)); + ushort8 r2_data = convert_ushort8((uchar8)(temp0.s468A, temp0.sCE, temp1.s02)); + + // Compute convolution along the X direction + ushort8 pixels = l2_data + r2_data; + pixels += l1_data * (ushort8)4; + pixels += m_data * (ushort8)6; + pixels += r1_data * (ushort8)4; + + // Store result + vstore8(pixels, 0, (__global ushort *)dst.ptr); +} + +/** Computes the Gaussian Filter 5x1 + sub-sampling along the Y direction + * + * @note Each thread computes 8 pixels + * + * @param[in] src_ptr Pointer to the source image. Supported data types: U16 + * @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 + * @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 gaussian5x1_sub_y( + IMAGE_DECLARATION(src), + IMAGE_DECLARATION(dst)) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); + Image dst = CONVERT_TO_IMAGE_STRUCT(dst); + + // Load values + ushort8 u2_data = vload8(0, (__global ushort *)offset(&src, 0, 0)); + ushort8 u1_data = vload8(0, (__global ushort *)offset(&src, 0, 1)); + ushort8 m_data = vload8(0, (__global ushort *)offset(&src, 0, 2)); + ushort8 d1_data = vload8(0, (__global ushort *)offset(&src, 0, 3)); + ushort8 d2_data = vload8(0, (__global ushort *)offset(&src, 0, 4)); + + // Compute convolution along the Y direction + ushort8 pixels = u2_data + d2_data; + pixels += u1_data * (ushort8)4; + pixels += m_data * (ushort8)6; + pixels += d1_data * (ushort8)4; + + // Scale result + pixels >>= (ushort8)8; + + // Store result + vstore8(convert_uchar8_sat(pixels), 0, dst.ptr); +} -- cgit v1.2.1