2 * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
3 * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "libavutil/common.h"
27 /* Gives very similar result than the vp6 version except in a few cases */
28 static int vp5_adjust(int v
, int t
)
44 static int vp6_adjust(int v
, int t
)
46 int V
= v
, s
= v
>> 31;
49 if (V
-t
-1 >= (unsigned)(t
-1))
58 #define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc) \
59 static void pfx##_edge_filter_##suf(uint8_t *yuv, int stride, int t) \
61 int pix2_inc = 2 * pix_inc; \
64 for (i=0; i<12; i++) { \
65 v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\
66 v = pfx##_adjust(v, t); \
67 yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v); \
68 yuv[0] = av_clip_uint8(yuv[0] - v); \
73 VP56_EDGE_FILTER(vp5
, hor
, 1, stride
)
74 VP56_EDGE_FILTER(vp5
, ver
, stride
, 1)
75 VP56_EDGE_FILTER(vp6
, hor
, 1, stride
)
76 VP56_EDGE_FILTER(vp6
, ver
, stride
, 1)
78 void ff_vp56dsp_init(VP56DSPContext
*s
, enum AVCodecID codec
)
80 if (codec
== AV_CODEC_ID_VP5
) {
81 s
->edge_filter_hor
= vp5_edge_filter_hor
;
82 s
->edge_filter_ver
= vp5_edge_filter_ver
;
84 s
->edge_filter_hor
= vp6_edge_filter_hor
;
85 s
->edge_filter_ver
= vp6_edge_filter_ver
;
87 if (CONFIG_VP6_DECODER
) {
88 s
->vp6_filter_diag4
= ff_vp6_filter_diag4_c
;
92 if (ARCH_ARM
) ff_vp56dsp_init_arm(s
, codec
);
93 if (ARCH_X86
) ff_vp56dsp_init_x86(s
, codec
);