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60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/**
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* @file libavcodec/vp6dsp.c
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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 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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#include "libavutil/common.h"
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#include "dsputil.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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