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Diffstat (limited to 'src/core/CL/cl_kernels/nhwc/remap.cl')
| -rw-r--r-- | src/core/CL/cl_kernels/nhwc/remap.cl | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/src/core/CL/cl_kernels/nhwc/remap.cl b/src/core/CL/cl_kernels/nhwc/remap.cl new file mode 100644 index 0000000000..0b629fe6c9 --- /dev/null +++ b/src/core/CL/cl_kernels/nhwc/remap.cl @@ -0,0 +1,180 @@ +/* + * Copyright (c) 2017-2021 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" +#include "warp_helpers.h" + +#ifdef DEPTH_OUT +/** Performs a remapping of an input image to an output given two remapping image using nearest neighbor as interpolation. + * Also applies constant border value, "border_val", if "CONSTANT_BORDER" is set. + * + * This kernel performs remapping with this method of pixel coordinate translation: + * out(x,y) = in(mapx(x,y), mapy(x,y)); + * + * @param[in] in_ptr Pointer to the source image. Supported data types: U8,F16. + * @param[in] in_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] in_step_x in_stride_x * number of elements along X processed per work item (in bytes) + * @param[in] in_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] in_step_y in_stride_y * number of elements along Y processed per work item (in bytes) + * @param[in] in_offset_first_element_in_bytes Offset of the first element in the source image + * @param[out] out_ptr Pointer to the destination image. Supported data types: U8,F16. + * @param[in] out_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] out_step_x out_stride_x * number of elements along X processed per work item (in bytes) + * @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] out_step_y out_stride_y * number of elements along Y processed per work item (in bytes) + * @param[in] out_offset_first_element_in_bytes Offset of the first element in the destination image + * @param[in] mapx_ptr Pointer to the x remapping image. Supported data types: F32. + * @param[in] mapx_stride_x Stride of the remapping image in X dimension (in bytes) + * @param[in] mapx_step_x mapx_stride_x * number of elements along X processed per work item (in bytes) + * @param[in] mapx_stride_y Stride of the remapping image in Y dimension (in bytes) + * @param[in] mapx_step_y mapy_stride_y * number of elements along Y processed per work item (in bytes) + * @param[in] mapx_offset_first_element_in_bytes Offset of the first element in the remapping image + * @param[in] mapy_ptr Pointer to the x remapping image. Supported data types: F32. + * @param[in] mapy_stride_x Stride of the remapping image in X dimension (in bytes) + * @param[in] mapy_step_x mapy_stride_x * number of elements along X processed per work item (in bytes) + * @param[in] mapy_stride_y Stride of the remapping image in Y dimension (in bytes) + * @param[in] mapy_step_y mapy_stride_y * number of elements along Y processed per work item (in bytes) + * @param[in] mapy_offset_first_element_in_bytes Offset of the first element in the remapping image + * @param[in] width Width of the input image + * @param[in] height Height of the input image + * @param[in] border_val Value to use for border around input tensor when in CONSTANT border is selected + */ +__kernel void remap_nearest_neighbour_nhwc( + TENSOR4D_DECLARATION(in), + TENSOR4D_DECLARATION(out), + TENSOR4D_DECLARATION(mapx), + TENSOR4D_DECLARATION(mapy), + const float width, + const float height +#ifdef CONSTANT_BORDER + , + const DATA_TYPE border_val +#endif // CONSTANT_BORDER +) +{ + Tensor4D in = CONVERT_TO_TENSOR4D_STRUCT_NO_STEP(in, 0); + Tensor4D out = CONVERT_TO_TENSOR4D_STRUCT(out, DEPTH_OUT); + Tensor4D mapx = CONVERT_TO_TENSOR4D_STRUCT(mapx, DEPTH_OUT); + Tensor4D mapy = CONVERT_TO_TENSOR4D_STRUCT(mapy, DEPTH_OUT); + + float mapx_coord = (float) * (__global float *)mapx.ptr; + float mapy_coord = (float) * (__global float *)mapy.ptr; + +#ifdef CONSTANT_BORDER + if(mapx_coord < 0 || mapx_coord > width - 1 || mapy_coord < 0 || mapy_coord > height - 1) + { + *((__global DATA_TYPE *)out.ptr) = border_val; + return; + } +#else // CONSTANT_BORDER + mapx_coord = clamp(mapx_coord, 0.0f, width - 1); + mapy_coord = clamp(mapy_coord, 0.0f, height - 1); +#endif // CONSTANT_BORDER + *((__global DATA_TYPE *)out.ptr) = *((__global DATA_TYPE *)tensor4D_offset(&in, get_global_id(0), convert_int(mapx_coord), convert_int(mapy_coord), (get_global_id(2) / DEPTH_OUT))); +} + +/** Performs a remapping of an input image to an output given two remapping image using bilinear as interpolation. + * Also applies constant border value, "border_val", if "CONSTANT_BORDER" is set. + * + * This kernel performs remapping with this method of pixel coordinate translation: + * out(x,y) = in(mapx(x,y), mapy(x,y)); + * + * @param[in] in_ptr Pointer to the source image. Supported data types: U8,F16. + * @param[in] in_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] in_step_x in_stride_x * number of elements along X processed per work item (in bytes) + * @param[in] in_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] in_step_y in_stride_y * number of elements along Y processed per work item (in bytes) + * @param[in] in_offset_first_element_in_bytes Offset of the first element in the source image + * @param[out] out_ptr Pointer to the destination image. Supported data types: U8,F16. + * @param[in] out_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] out_step_x out_stride_x * number of elements along X processed per work item (in bytes) + * @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] out_step_y out_stride_y * number of elements along Y processed per work item (in bytes) + * @param[in] out_offset_first_element_in_bytes Offset of the first element in the destination image + * @param[in] mapx_ptr Pointer to the x remapping image. Supported data types: F32. + * @param[in] mapx_stride_x Stride of the remapping image in X dimension (in bytes) + * @param[in] mapx_step_x mapx_stride_x * number of elements along X processed per work item (in bytes) + * @param[in] mapx_stride_y Stride of the remapping image in Y dimension (in bytes) + * @param[in] mapx_step_y mapy_stride_y * number of elements along Y processed per work item (in bytes) + * @param[in] mapx_offset_first_element_in_bytes Offset of the first element in the remapping image + * @param[in] mapy_ptr Pointer to the x remapping image. Supported data types: F32. + * @param[in] mapy_stride_x Stride of the remapping image in X dimension (in bytes) + * @param[in] mapy_step_x mapy_stride_x * number of elements along X processed per work item (in bytes) + * @param[in] mapy_stride_y Stride of the remapping image in Y dimension (in bytes) + * @param[in] mapy_step_y mapy_stride_y * number of elements along Y processed per work item (in bytes) + * @param[in] mapy_offset_first_element_in_bytes Offset of the first element in the remapping image + * @param[in] width Width of the input image + * @param[in] height Height of the input image + * @param[in] border_val Value to use for border around input tensor when in CONSTANT border is selected + */ +__kernel void remap_bilinear_nhwc( + TENSOR4D_DECLARATION(in), + TENSOR4D_DECLARATION(out), + TENSOR4D_DECLARATION(mapx), + TENSOR4D_DECLARATION(mapy), + const float width, + const float height +#ifdef CONSTANT_BORDER + , + const DATA_TYPE border_val +#endif // CONSTANT_BORDER +) +{ + Tensor4D in = CONVERT_TO_TENSOR4D_STRUCT_NO_STEP(in, 0); + Tensor4D out = CONVERT_TO_TENSOR4D_STRUCT(out, DEPTH_OUT); + Tensor4D mapx = CONVERT_TO_TENSOR4D_STRUCT(mapx, DEPTH_OUT); + Tensor4D mapy = CONVERT_TO_TENSOR4D_STRUCT(mapy, DEPTH_OUT); + + float mapx_coord = (float) * (__global float *)mapx.ptr; + float mapy_coord = (float) * (__global float *)mapy.ptr; + +#ifdef CONSTANT_BORDER + if(mapx_coord < 0 || mapx_coord > width - 1 || mapy_coord < 0 || mapy_coord > height - 1) + { + *((__global DATA_TYPE *)out.ptr) = border_val; + return; + } +#endif // CONSTANT_BORDER + + const float new_xf = floor(mapx_coord); + const float new_yf = floor(mapy_coord); + const float clamped_x = clamp(new_xf, 0.0f, width - 1); + const float clamped_x1 = clamp(new_xf + 1, 0.0f, width - 1); + const float clamped_y = clamp(new_yf, 0.0f, height - 1); + const float clamped_y1 = clamp(new_yf + 1, 0.0f, height - 1); + + float4 ins = (float4)(*((__global DATA_TYPE *)tensor4D_offset(&in, get_global_id(0), convert_int(clamped_x), convert_int(clamped_y), (get_global_id(2) / DEPTH_OUT))), + *((__global DATA_TYPE *)tensor4D_offset(&in, get_global_id(0), convert_int(clamped_x1), convert_int(clamped_y), (get_global_id(2) / DEPTH_OUT))), + *((__global DATA_TYPE *)tensor4D_offset(&in, get_global_id(0), convert_int(clamped_x), convert_int(clamped_y1), (get_global_id(2) / DEPTH_OUT))), + *((__global DATA_TYPE *)tensor4D_offset(&in, get_global_id(0), convert_int(clamped_x1), convert_int(clamped_y1), (get_global_id(2) / DEPTH_OUT)))); + + const float a = mapx_coord - new_xf; + const float b = 1.f - a; + const float a1 = mapy_coord - new_yf; + const float b1 = 1.f - a1; + const float fr = ((ins.s0 * b * b1) + (ins.s1 * a * b1) + (ins.s2 * b * a1) + (ins.s3 * a * a1)); + + *((__global DATA_TYPE *)out.ptr) = CONVERT(fr, DATA_TYPE); +} + +#endif // DEPTH_OUT
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