mirror of
https://github.com/eddyem/astrovideoguide_v3.git
synced 2025-12-06 10:45:10 +03:00
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
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* This file is part of the loccorr project.
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* Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// inner part of function `filter8`
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#if ! defined IM_UP && ! defined IM_DOWN
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OMP_FOR()
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for(int y = 1; y < h; y++)
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#endif
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{
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uint8_t *iptr = &image[W0*y];
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uint8_t *optr = &ret[W0*y];
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// x=0
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register uint8_t inp = *iptr;
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register uint8_t p = (inp << 1) | (inp >> 1)
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#ifndef IM_UP
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| iptr[-W0] | (iptr[-W0]<<1) | (iptr[-W0]>>1)
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#endif
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#ifndef IM_DOWN
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| iptr[W0] | (iptr[W0]<<1) | (iptr[W0]>>1)
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#endif
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;
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if((iptr[1]
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#ifndef IM_UP
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| iptr[-W0+1]
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#endif
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#ifndef IM_DOWN
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| iptr[W0+1]
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#endif
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)& 0x80) p |= 1;
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*optr++ = inp & p;
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++iptr;
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for(int x = 1; x < w; ++x){
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inp = *iptr;
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p = (inp << 1) | (inp >> 1)
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#ifndef IM_UP
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| iptr[-W0] | (iptr[-W0]<<1) | (iptr[-W0]>>1)
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#endif
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#ifndef IM_DOWN
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| iptr[W0] | (iptr[W0]<<1) | (iptr[W0]>>1)
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#endif
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;
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if((iptr[1]
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#ifndef IM_UP
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| iptr[-W0+1]
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#endif
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#ifndef IM_DOWN
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| iptr[W0+1]
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#endif
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)& 0x80) p |= 1;
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if((iptr[-1]
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#ifndef IM_UP
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| iptr[-W0-1]
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#endif
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#ifndef IM_DOWN
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| iptr[W0-1]
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#endif
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)& 1) p |= 0x80;
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*optr++ = inp & p;
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++iptr;
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}
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// x = W0-1
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inp = *iptr;
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p = (inp << 1) | (inp >> 1)
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#ifndef IM_UP
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| iptr[-W0] | (iptr[-W0]<<1) | (iptr[-W0]>>1)
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#endif
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#ifndef IM_DOWN
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| iptr[W0] | (iptr[W0]<<1) | (iptr[W0]>>1)
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#endif
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;
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if((iptr[-1]
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#ifndef IM_UP
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| iptr[-W0-1]
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#endif
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#ifndef IM_DOWN
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| iptr[W0-1]
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#endif
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)& 1) p |= 0x80;
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*optr = inp & p;
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}
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