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59 lines
1.8 KiB
59 lines
1.8 KiB
/** |
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* @file |
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* VP6 DSP-oriented functions |
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* |
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* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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#include "libavutil/common.h" |
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#include "vp56dsp.h" |
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void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride, |
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const int16_t *h_weights, const int16_t *v_weights) |
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{ |
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int x, y; |
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int tmp[8*11]; |
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int *t = tmp; |
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src -= stride; |
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for (y=0; y<11; y++) { |
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for (x=0; x<8; x++) { |
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t[x] = av_clip_uint8(( src[x-1] * h_weights[0] |
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+ src[x ] * h_weights[1] |
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+ src[x+1] * h_weights[2] |
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+ src[x+2] * h_weights[3] + 64) >> 7); |
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} |
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src += stride; |
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t += 8; |
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} |
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t = tmp + 8; |
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for (y=0; y<8; y++) { |
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for (x=0; x<8; x++) { |
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dst[x] = av_clip_uint8(( t[x-8 ] * v_weights[0] |
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+ t[x ] * v_weights[1] |
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+ t[x+8 ] * v_weights[2] |
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+ t[x+16] * v_weights[3] + 64) >> 7); |
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} |
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dst += stride; |
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t += 8; |
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} |
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}
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