1/* 2 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/** 22 * @file 23 * VP6 DSP-oriented functions 24 */ 25 26#include "libavutil/common.h" 27#include "vp56dsp.h" 28 29 30void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride, 31 const int16_t *h_weights, const int16_t *v_weights) 32{ 33 int x, y; 34 int tmp[8*11]; 35 int *t = tmp; 36 37 src -= stride; 38 39 for (y=0; y<11; y++) { 40 for (x=0; x<8; x++) { 41 t[x] = av_clip_uint8(( src[x-1] * h_weights[0] 42 + src[x ] * h_weights[1] 43 + src[x+1] * h_weights[2] 44 + src[x+2] * h_weights[3] + 64) >> 7); 45 } 46 src += stride; 47 t += 8; 48 } 49 50 t = tmp + 8; 51 for (y=0; y<8; y++) { 52 for (x=0; x<8; x++) { 53 dst[x] = av_clip_uint8(( t[x-8 ] * v_weights[0] 54 + t[x ] * v_weights[1] 55 + t[x+8 ] * v_weights[2] 56 + t[x+16] * v_weights[3] + 64) >> 7); 57 } 58 dst += stride; 59 t += 8; 60 } 61} 62