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 "libavutil/attributes.h"
25 #include "avcodec.h"
26 #include "vp56dsp.h"
27 #include "libavutil/common.h"
28 
29 #define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc) \
30 static void pfx ## _edge_filter_ ## suf(uint8_t *yuv, ptrdiff_t stride, \
31  int t) \
32 { \
33  int pix2_inc = 2 * pix_inc; \
34  int i, v; \
35  \
36  for (i=0; i<12; i++) { \
37  v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\
38  v = pfx##_adjust(v, t); \
39  yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v); \
40  yuv[0] = av_clip_uint8(yuv[0] - v); \
41  yuv += line_inc; \
42  } \
43 }
44 
45 #if CONFIG_VP5_DECODER
46 /* Gives very similar result than the vp6 version except in a few cases */
47 static int vp5_adjust(int v, int t)
48 {
49  int s2, s1 = v >> 31;
50  v ^= s1;
51  v -= s1;
52  v *= v < 2*t;
53  v -= t;
54  s2 = v >> 31;
55  v ^= s2;
56  v -= s2;
57  v = t - v;
58  v += s1;
59  v ^= s1;
60  return v;
61 }
62 
63 
64 VP56_EDGE_FILTER(vp5, hor, 1, stride)
65 VP56_EDGE_FILTER(vp5, ver, stride, 1)
66 
68 {
69  s->edge_filter_hor = vp5_edge_filter_hor;
70  s->edge_filter_ver = vp5_edge_filter_ver;
71 }
72 #endif /* CONFIG_VP5_DECODER */
73 
74 #if CONFIG_VP6_DECODER
76 {
78 
79  if (ARCH_ARM)
81  if (ARCH_X86)
83 }
84 #endif /* CONFIG_VP6_DECODER */
#define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc)
Definition: vp56dsp.c:29
void ff_vp6dsp_init_x86(VP56DSPContext *s)
Definition: vp6dsp_init.c:33
Macro definitions for various function/variable attributes.
void(* vp6_filter_diag4)(uint8_t *dst, uint8_t *src, ptrdiff_t stride, const int16_t *h_weights, const int16_t *v_weights)
Definition: vp56dsp.h:31
#define av_cold
Definition: attributes.h:82
av_cold void ff_vp6dsp_init_arm(VP56DSPContext *s)
#define s2
Definition: regdef.h:39
#define s(width, name)
Definition: cbs_vp9.c:257
void ff_vp6dsp_init(VP56DSPContext *s)
Libavcodec external API header.
#define s1
Definition: regdef.h:38
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
common internal and external API header
void(* edge_filter_hor)(uint8_t *yuv, ptrdiff_t stride, int t)
Definition: vp56dsp.h:28
void ff_vp5dsp_init(VP56DSPContext *s)
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
void(* edge_filter_ver)(uint8_t *yuv, ptrdiff_t stride, int t)
Definition: vp56dsp.h:29