Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
Michele Di Giorgio | d9eaf61 | 2020-07-08 11:12:57 +0100 | [diff] [blame] | 2 | * Copyright (c) 2017 Arm Limited. |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #include "helpers.h" |
| 25 | #include "non_linear_filter_helpers.h" |
| 26 | |
| 27 | /** This function applies a non linear filter on a 3x3 box basis on an input image. |
| 28 | * |
| 29 | * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. |
| 30 | * |
| 31 | * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| 32 | * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| 33 | * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| 34 | * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| 35 | * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| 36 | * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| 37 | * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 |
| 38 | * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| 39 | * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| 40 | * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| 41 | * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| 42 | * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| 43 | */ |
| 44 | __kernel void non_linear_filter_box3x3( |
| 45 | IMAGE_DECLARATION(src), |
| 46 | IMAGE_DECLARATION(dst)) |
| 47 | { |
| 48 | Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| 49 | Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| 50 | |
| 51 | // Load values |
| 52 | uchar16 top = vload16(0, offset(&src, -1, -1)); |
| 53 | uchar16 middle = vload16(0, offset(&src, -1, 0)); |
| 54 | uchar16 bottom = vload16(0, offset(&src, -1, 1)); |
| 55 | |
| 56 | // Apply respective filter |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 57 | #ifdef MIN |
| 58 | uchar16 tmp = min(top, min(middle, bottom)); |
| 59 | uchar8 out = row_reduce_min_3(tmp); |
| 60 | #elif defined(MAX) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 61 | uchar16 tmp = max(top, max(middle, bottom)); |
| 62 | uchar8 out = row_reduce_max_3(tmp); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 63 | #elif defined(MEDIAN) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 64 | uchar8 p0 = top.s01234567; |
| 65 | uchar8 p1 = top.s12345678; |
| 66 | uchar8 p2 = top.s23456789; |
| 67 | uchar8 p3 = middle.s01234567; |
| 68 | uchar8 p4 = middle.s12345678; |
| 69 | uchar8 p5 = middle.s23456789; |
| 70 | uchar8 p6 = bottom.s01234567; |
| 71 | uchar8 p7 = bottom.s12345678; |
| 72 | uchar8 p8 = bottom.s23456789; |
| 73 | uchar8 out = sort9(p0, p1, p2, p3, p4, p5, p6, p7, p8); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 74 | #else /* MIN or MAX or MEDIAN */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 75 | #error "Unsupported filter function" |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 76 | #endif /* MIN or MAX or MEDIAN */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 77 | |
| 78 | // Store result |
| 79 | vstore8(out, 0, dst.ptr); |
| 80 | } |
| 81 | |
| 82 | /** This function applies a non linear filter on a 3x3 cross basis on an input image. |
| 83 | * |
| 84 | * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. |
| 85 | * |
| 86 | * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| 87 | * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| 88 | * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| 89 | * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| 90 | * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| 91 | * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| 92 | * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 |
| 93 | * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| 94 | * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| 95 | * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| 96 | * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| 97 | * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| 98 | */ |
| 99 | __kernel void non_linear_filter_cross3x3( |
| 100 | IMAGE_DECLARATION(src), |
| 101 | IMAGE_DECLARATION(dst)) |
| 102 | { |
| 103 | Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| 104 | Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| 105 | |
| 106 | // Load values |
| 107 | uchar8 top = vload8(0, offset(&src, 0, -1)); |
| 108 | uchar16 middle = vload16(0, offset(&src, -1, 0)); |
| 109 | uchar8 bottom = vload8(0, offset(&src, 0, 1)); |
| 110 | |
| 111 | // Apply respective filter |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 112 | #ifdef MIN |
| 113 | uchar8 tmp_middle = row_reduce_min_3(middle); |
| 114 | uchar8 out = min(tmp_middle, min(top, bottom)); |
| 115 | #elif defined(MAX) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 116 | uchar8 tmp_middle = row_reduce_max_3(middle); |
| 117 | uchar8 out = max(tmp_middle, max(top, bottom)); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 118 | #elif defined(MEDIAN) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 119 | uchar8 p0 = top.s01234567; |
| 120 | uchar8 p1 = middle.s01234567; |
| 121 | uchar8 p2 = middle.s12345678; |
| 122 | uchar8 p3 = middle.s23456789; |
| 123 | uchar8 p4 = bottom.s01234567; |
| 124 | uchar8 out = sort5(p0, p1, p2, p3, p4); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 125 | #else /* MIN or MAX or MEDIAN */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 126 | #error "Unsupported filter function" |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 127 | #endif /* MIN or MAX or MEDIAN */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 128 | |
| 129 | // Store result |
| 130 | vstore8(out, 0, dst.ptr); |
| 131 | } |
| 132 | |
| 133 | /** This function applies a non linear filter on a 3x3 disk basis on an input image. |
| 134 | * |
| 135 | * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. |
| 136 | * |
| 137 | * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| 138 | * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| 139 | * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| 140 | * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| 141 | * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| 142 | * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| 143 | * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 |
| 144 | * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| 145 | * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| 146 | * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| 147 | * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| 148 | * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| 149 | */ |
| 150 | __kernel void non_linear_filter_disk3x3( |
| 151 | IMAGE_DECLARATION(src), |
| 152 | IMAGE_DECLARATION(dst)) |
| 153 | { |
| 154 | Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| 155 | Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| 156 | |
| 157 | // Load values |
| 158 | uchar16 top = vload16(0, offset(&src, -1, -1)); |
| 159 | uchar16 middle = vload16(0, offset(&src, -1, 0)); |
| 160 | uchar16 bottom = vload16(0, offset(&src, -1, 1)); |
| 161 | |
| 162 | // Apply respective filter |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 163 | #ifdef MIN |
| 164 | uchar16 tmp = min(top, min(middle, bottom)); |
| 165 | uchar8 out = row_reduce_min_3(tmp); |
| 166 | #elif defined(MAX) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 167 | uchar16 tmp = max(top, max(middle, bottom)); |
| 168 | uchar8 out = row_reduce_max_3(tmp); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 169 | #elif defined(MEDIAN) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 170 | uchar8 p0 = top.s01234567; |
| 171 | uchar8 p1 = top.s12345678; |
| 172 | uchar8 p2 = top.s23456789; |
| 173 | uchar8 p3 = middle.s01234567; |
| 174 | uchar8 p4 = middle.s12345678; |
| 175 | uchar8 p5 = middle.s23456789; |
| 176 | uchar8 p6 = bottom.s01234567; |
| 177 | uchar8 p7 = bottom.s12345678; |
| 178 | uchar8 p8 = bottom.s23456789; |
| 179 | uchar8 out = sort9(p0, p1, p2, p3, p4, p5, p6, p7, p8); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 180 | #else /* MIN or MAX or MEDIAN */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 181 | #error "Unsupported filter function" |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame] | 182 | #endif /* MIN or MAX or MEDIAN */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 183 | |
| 184 | // Store result |
| 185 | vstore8(out, 0, dst.ptr); |
| 186 | } |