mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.9 KiB
88 lines
2.9 KiB
/* |
|
* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org> |
|
* Copyright (c) 2010 Mans Rullgard <mans@mansr.com> |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include <stdint.h> |
|
#include "avcodec.h" |
|
#include "vp56dsp.h" |
|
|
|
/* Gives very similar result than the vp6 version except in a few cases */ |
|
static int vp5_adjust(int v, int t) |
|
{ |
|
int s2, s1 = v >> 31; |
|
v ^= s1; |
|
v -= s1; |
|
v *= v < 2*t; |
|
v -= t; |
|
s2 = v >> 31; |
|
v ^= s2; |
|
v -= s2; |
|
v = t - v; |
|
v += s1; |
|
v ^= s1; |
|
return v; |
|
} |
|
|
|
static int vp6_adjust(int v, int t) |
|
{ |
|
int V = v, s = v >> 31; |
|
V ^= s; |
|
V -= s; |
|
if (V-t-1 >= (unsigned)(t-1)) |
|
return v; |
|
V = 2*t - V; |
|
V += s; |
|
V ^= s; |
|
return V; |
|
} |
|
|
|
|
|
#define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc) \ |
|
static void pfx##_edge_filter_##suf(uint8_t *yuv, int stride, int t) \ |
|
{ \ |
|
int pix2_inc = 2 * pix_inc; \ |
|
int i, v; \ |
|
\ |
|
for (i=0; i<12; i++) { \ |
|
v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\ |
|
v = pfx##_adjust(v, t); \ |
|
yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v); \ |
|
yuv[0] = av_clip_uint8(yuv[0] - v); \ |
|
yuv += line_inc; \ |
|
} \ |
|
} |
|
|
|
VP56_EDGE_FILTER(vp5, hor, 1, stride) |
|
VP56_EDGE_FILTER(vp5, ver, stride, 1) |
|
VP56_EDGE_FILTER(vp6, hor, 1, stride) |
|
VP56_EDGE_FILTER(vp6, ver, stride, 1) |
|
|
|
void ff_vp56dsp_init(VP56DSPContext *s, enum CodecID codec) |
|
{ |
|
if (codec == CODEC_ID_VP5) { |
|
s->edge_filter_hor = vp5_edge_filter_hor; |
|
s->edge_filter_ver = vp5_edge_filter_ver; |
|
} else { |
|
s->edge_filter_hor = vp6_edge_filter_hor; |
|
s->edge_filter_ver = vp6_edge_filter_ver; |
|
} |
|
|
|
if (ARCH_ARM) ff_vp56dsp_init_arm(s, codec); |
|
}
|
|
|