/* * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * VP6 DSP-oriented functions */ #include "libavutil/common.h" #include "vp56dsp.h" void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride, const int16_t *h_weights, const int16_t *v_weights) { int x, y; int tmp[8*11]; int *t = tmp; src -= stride; for (y=0; y<11; y++) { for (x=0; x<8; x++) { t[x] = av_clip_uint8(( src[x-1] * h_weights[0] + src[x ] * h_weights[1] + src[x+1] * h_weights[2] + src[x+2] * h_weights[3] + 64) >> 7); } src += stride; t += 8; } t = tmp + 8; for (y=0; y<8; y++) { for (x=0; x<8; x++) { dst[x] = av_clip_uint8(( t[x-8 ] * v_weights[0] + t[x ] * v_weights[1] + t[x+8 ] * v_weights[2] + t[x+16] * v_weights[3] + 64) >> 7); } dst += stride; t += 8; } }