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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, 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 | } |