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vp6dsp.c
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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 
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 }
uint8_t
static uint8_t tmp[8]
Definition: des-test.c:38
#define src
Definition: vp9dsp.c:530
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal and external API header
void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride, const int16_t *h_weights, const int16_t *v_weights)
Definition: vp6dsp.c:30
#define stride