2 * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
3 * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
5 * This file is part of FFmpeg.
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.
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.
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
24 #include "libavutil/attributes.h"
27 #include "libavutil/common.h"
29 /* Gives very similar result than the vp6 version except in a few cases */
30 static int vp5_adjust(int v
, int t
)
46 static int vp6_adjust(int v
, int t
)
48 int V
= v
, s
= v
>> 31;
51 if (V
-t
-1 >= (unsigned)(t
-1))
60 #define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc) \
61 static void pfx##_edge_filter_##suf(uint8_t *yuv, int stride, int t) \
63 int pix2_inc = 2 * pix_inc; \
66 for (i=0; i<12; i++) { \
67 v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\
68 v = pfx##_adjust(v, t); \
69 yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v); \
70 yuv[0] = av_clip_uint8(yuv[0] - v); \
75 VP56_EDGE_FILTER(vp5
, hor
, 1, stride
)
76 VP56_EDGE_FILTER(vp5
, ver
, stride
, 1)
77 VP56_EDGE_FILTER(vp6
, hor
, 1, stride
)
78 VP56_EDGE_FILTER(vp6
, ver
, stride
, 1)
80 av_cold
void ff_vp56dsp_init(VP56DSPContext
*s
, enum AVCodecID codec
)
82 if (codec
== AV_CODEC_ID_VP5
) {
83 s
->edge_filter_hor
= vp5_edge_filter_hor
;
84 s
->edge_filter_ver
= vp5_edge_filter_ver
;
86 s
->edge_filter_hor
= vp6_edge_filter_hor
;
87 s
->edge_filter_ver
= vp6_edge_filter_ver
;
89 if (CONFIG_VP6_DECODER
) {
90 s
->vp6_filter_diag4
= ff_vp6_filter_diag4_c
;
93 ff_vp6dsp_init_arm(s
, codec
);
95 ff_vp6dsp_init_x86(s
, codec
);