mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-24 00:02:52 +00:00
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/**
|
|
* @file libavcodec/vp6dsp.c
|
|
* VP6 DSP-oriented functions
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/common.h"
|
|
#include "dsputil.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;
|
|
}
|
|
}
|