blob: f7f6856330c27c509ae04f537c6e89c80b823226
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 | |
30 | void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, ptrdiff_t 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 |