kolibrios/contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavcodec/vp6dsp.c
Sergey Semyonov (Serge) a4b787f4b8 ffmpeg-2.8.5
git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-02-05 22:08:02 +00:00

62 lines
1.8 KiB
C

/*
* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
* 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
*/
/**
* @file
* VP6 DSP-oriented functions
*/
#include "libavutil/common.h"
#include "vp56dsp.h"
void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride,
const int16_t *h_weights, const int16_t *v_weights)
{
int x, y;
int tmp[8*11];
int *t = tmp;
src -= stride;
for (y=0; y<11; y++) {
for (x=0; x<8; x++) {
t[x] = av_clip_uint8(( src[x-1] * h_weights[0]
+ src[x ] * h_weights[1]
+ src[x+1] * h_weights[2]
+ src[x+2] * h_weights[3] + 64) >> 7);
}
src += stride;
t += 8;
}
t = tmp + 8;
for (y=0; y<8; y++) {
for (x=0; x<8; x++) {
dst[x] = av_clip_uint8(( t[x-8 ] * v_weights[0]
+ t[x ] * v_weights[1]
+ t[x+8 ] * v_weights[2]
+ t[x+16] * v_weights[3] + 64) >> 7);
}
dst += stride;
t += 8;
}
}