36 lines
1.4 KiB
Common Lisp
36 lines
1.4 KiB
Common Lisp
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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 transpose(__write_only image2d_t dst,
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__read_only image2d_t src,
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int dir) {
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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 size = get_image_dim(dst);
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int x = get_global_id(0);
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int y = get_global_id(1);
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int xin = (dir & 2) ? (size.y - 1 - y) : y;
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int yin = (dir & 1) ? (size.x - 1 - x) : x;
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float4 data = read_imagef(src, sampler, (int2)(xin, yin));
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if (x < size.x && y < size.y)
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write_imagef(dst, (int2)(x, y), data);
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}
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