1/*
2 * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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