1/** 2 * @file 3 * VP6 DSP-oriented functions 4 * 5 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> 6 * 7 * This file is part of FFmpeg. 8 * 9 * FFmpeg is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * FFmpeg is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with FFmpeg; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24#include "libavutil/common.h" 25#include "dsputil.h" 26 27 28void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride, 29 const int16_t *h_weights, const int16_t *v_weights) 30{ 31 int x, y; 32 int tmp[8*11]; 33 int *t = tmp; 34 35 src -= stride; 36 37 for (y=0; y<11; y++) { 38 for (x=0; x<8; x++) { 39 t[x] = av_clip_uint8(( src[x-1] * h_weights[0] 40 + src[x ] * h_weights[1] 41 + src[x+1] * h_weights[2] 42 + src[x+2] * h_weights[3] + 64) >> 7); 43 } 44 src += stride; 45 t += 8; 46 } 47 48 t = tmp + 8; 49 for (y=0; y<8; y++) { 50 for (x=0; x<8; x++) { 51 dst[x] = av_clip_uint8(( t[x-8 ] * v_weights[0] 52 + t[x ] * v_weights[1] 53 + t[x+8 ] * v_weights[2] 54 + t[x+16] * v_weights[3] + 64) >> 7); 55 } 56 dst += stride; 57 t += 8; 58 } 59} 60