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![Danil Iashchenko](/assets/img/avatar_default.png)
Add erosion_opencl, dilation_opencl filters. Behave like existing erosion and dilation filters.
88 lines
2.7 KiB
Common Lisp
88 lines
2.7 KiB
Common Lisp
/*
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* Copyright (c) 2018 Danil Iashchenko
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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__kernel void erosion_global(__write_only image2d_t dst,
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__read_only image2d_t src,
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float threshold,
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__constant int *coord)
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{
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const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
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CLK_ADDRESS_CLAMP_TO_EDGE |
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CLK_FILTER_NEAREST);
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int2 loc = (int2)(get_global_id(0), get_global_id(1));
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float4 px = read_imagef(src, sampler, loc);
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float limit = px.x - threshold;
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if (limit < 0) {
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limit = 0;
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}
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for (int i = -1; i <= 1; i++) {
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for (int j = -1; j <= 1; j++) {
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if (coord[(j + 1) * 3 + (i + 1)] == 1) {
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float4 cur = read_imagef(src, sampler, loc + (int2)(i, j));
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if (cur.x < px.x) {
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px = cur;
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}
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}
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}
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}
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if (limit > px.x) {
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px = (float4)(limit);
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}
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write_imagef(dst, loc, px);
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}
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__kernel void dilation_global(__write_only image2d_t dst,
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__read_only image2d_t src,
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float threshold,
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__constant int *coord)
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{
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const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
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CLK_ADDRESS_CLAMP_TO_EDGE |
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CLK_FILTER_NEAREST);
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int2 loc = (int2)(get_global_id(0), get_global_id(1));
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float4 px = read_imagef(src, sampler, loc);
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float limit = px.x + threshold;
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if (limit > 1) {
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limit = 1;
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}
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for (int i = -1; i <= 1; i++) {
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for (int j = -1; j <= 1; j++) {
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if (coord[(j + 1) * 3 + (i + 1)] == 1) {
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float4 cur = read_imagef(src, sampler, loc + (int2)(i, j));
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if (cur.x > px.x) {
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px = cur;
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}
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}
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}
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}
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if (limit < px.x) {
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px = (float4)(limit);
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}
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write_imagef(dst, loc, px);
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}
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