FFmpeg
vp56dsp.c
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1 /*
2  * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
3  * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <stdint.h>
23 
24 #include "config.h"
25 #include "config_components.h"
26 #include "libavutil/attributes.h"
27 #include "vp56dsp.h"
28 #include "libavutil/common.h"
29 
30 #define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc) \
31 static void pfx ## _edge_filter_ ## suf(uint8_t *yuv, ptrdiff_t stride, \
32  int t) \
33 { \
34  int pix2_inc = 2 * pix_inc; \
35  int i, v; \
36  \
37  for (i=0; i<12; i++) { \
38  v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\
39  v = pfx##_adjust(v, t); \
40  yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v); \
41  yuv[0] = av_clip_uint8(yuv[0] - v); \
42  yuv += line_inc; \
43  } \
44 }
45 
46 #if CONFIG_VP5_DECODER
47 /* Gives very similar result than the vp6 version except in a few cases */
48 static int vp5_adjust(int v, int t)
49 {
50  int s2, s1 = v >> 31;
51  v ^= s1;
52  v -= s1;
53  v *= v < 2*t;
54  v -= t;
55  s2 = v >> 31;
56  v ^= s2;
57  v -= s2;
58  v = t - v;
59  v += s1;
60  v ^= s1;
61  return v;
62 }
63 
64 
65 VP56_EDGE_FILTER(vp5, hor, 1, stride)
66 VP56_EDGE_FILTER(vp5, ver, stride, 1)
67 
69 {
70  s->edge_filter_hor = vp5_edge_filter_hor;
71  s->edge_filter_ver = vp5_edge_filter_ver;
72 }
73 #endif /* CONFIG_VP5_DECODER */
74 
75 #if CONFIG_VP6_DECODER
77 {
78  s->vp6_filter_diag4 = ff_vp6_filter_diag4_c;
79 
80  if (ARCH_ARM)
82  if (ARCH_X86)
84 }
85 #endif /* CONFIG_VP6_DECODER */
ff_vp5dsp_init
void ff_vp5dsp_init(VP56DSPContext *s)
ff_vp6_filter_diag4_c
void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride, const int16_t *h_weights, const int16_t *v_weights)
Definition: vp6dsp.c:30
ff_vp6dsp_init_arm
av_cold void ff_vp6dsp_init_arm(VP56DSPContext *s)
Definition: vp6dsp_init_arm.c:31
ff_vp6dsp_init_x86
void ff_vp6dsp_init_x86(VP56DSPContext *s)
Definition: vp6dsp_init.c:33
av_cold
#define av_cold
Definition: attributes.h:90
s
#define s(width, name)
Definition: cbs_vp9.c:256
s1
#define s1
Definition: regdef.h:38
ff_vp6dsp_init
void ff_vp6dsp_init(VP56DSPContext *s)
s2
#define s2
Definition: regdef.h:39
VP56DSPContext
Definition: vp56dsp.h:27
attributes.h
vp56dsp.h
common.h
stride
#define stride
Definition: h264pred_template.c:537
VP56_EDGE_FILTER
#define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc)
Definition: vp56dsp.c:30