yading@10: /*
yading@10:  * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * VP6 DSP-oriented functions
yading@10:  */
yading@10: 
yading@10: #include "libavutil/common.h"
yading@10: #include "vp56dsp.h"
yading@10: 
yading@10: 
yading@10: void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride,
yading@10:                            const int16_t *h_weights, const int16_t *v_weights)
yading@10: {
yading@10:     int x, y;
yading@10:     int tmp[8*11];
yading@10:     int *t = tmp;
yading@10: 
yading@10:     src -= stride;
yading@10: 
yading@10:     for (y=0; y<11; y++) {
yading@10:         for (x=0; x<8; x++) {
yading@10:             t[x] = av_clip_uint8((  src[x-1] * h_weights[0]
yading@10:                                + src[x  ] * h_weights[1]
yading@10:                                + src[x+1] * h_weights[2]
yading@10:                                + src[x+2] * h_weights[3] + 64) >> 7);
yading@10:         }
yading@10:         src += stride;
yading@10:         t += 8;
yading@10:     }
yading@10: 
yading@10:     t = tmp + 8;
yading@10:     for (y=0; y<8; y++) {
yading@10:         for (x=0; x<8; x++) {
yading@10:             dst[x] = av_clip_uint8((  t[x-8 ] * v_weights[0]
yading@10:                                  + t[x   ] * v_weights[1]
yading@10:                                  + t[x+8 ] * v_weights[2]
yading@10:                                  + t[x+16] * v_weights[3] + 64) >> 7);
yading@10:         }
yading@10:         dst += stride;
yading@10:         t += 8;
yading@10:     }
yading@10: }