vp56: Change type of stride parameters to ptrdiff_t
[libav.git] / libavcodec / vp6dsp.c
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
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 }