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/*
* Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <assert.h>
#include "mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
//===========================================================================//
typedef struct FilterParam{
int radius;
int power;
}FilterParam;
struct vf_priv_s {
FilterParam lumaParam;
FilterParam chromaParam;
};
/***************************************************************************/
static int config(struct vf_instance *vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt){
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static inline void blur(uint8_t *dst, uint8_t *src, int w, int radius, int dstStep, int srcStep){
int x;
const int length= radius*2 + 1;
const int inv= ((1<<16) + length/2)/length;
int sum= 0;
for(x=0; x<radius; x++){
sum+= src[x*srcStep]<<1;
}
sum+= src[radius*srcStep];
for(x=0; x<=radius; x++){
sum+= src[(radius+x)*srcStep] - src[(radius-x)*srcStep];
dst[x*dstStep]= (sum*inv + (1<<15))>>16;
}
for(; x<w-radius; x++){
sum+= src[(radius+x)*srcStep] - src[(x-radius-1)*srcStep];
dst[x*dstStep]= (sum*inv + (1<<15))>>16;
}
for(; x<w; x++){
sum+= src[(2*w-radius-x-1)*srcStep] - src[(x-radius-1)*srcStep];
dst[x*dstStep]= (sum*inv + (1<<15))>>16;
}
}
static inline void blur2(uint8_t *dst, uint8_t *src, int w, int radius, int power, int dstStep, int srcStep){
uint8_t temp[2][4096];
uint8_t *a= temp[0], *b=temp[1];
if(radius){
blur(a, src, w, radius, 1, srcStep);
for(; power>2; power--){
uint8_t *c;
blur(b, a, w, radius, 1, 1);
c=a; a=b; b=c;
}
if(power>1)
blur(dst, a, w, radius, dstStep, 1);
else{
int i;
for(i=0; i<w; i++)
dst[i*dstStep]= a[i];
}
}else{
int i;
for(i=0; i<w; i++)
dst[i*dstStep]= src[i*srcStep];
}
}
static void hBlur(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, int radius, int power){
int y;
if(radius==0 && dst==src) return;
for(y=0; y<h; y++){
blur2(dst + y*dstStride, src + y*srcStride, w, radius, power, 1, 1);
}
}
//FIXME optimize (x before y !!!)
static void vBlur(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, int radius, int power){
int x;
if(radius==0 && dst==src) return;
for(x=0; x<w; x++){
blur2(dst + x, src + x, h, radius, power, dstStride, srcStride);
}
}
static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
int cw= mpi->w >> mpi->chroma_x_shift;
int ch= mpi->h >> mpi->chroma_y_shift;
mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_READABLE,
mpi->w,mpi->h);
assert(mpi->flags&MP_IMGFLAG_PLANAR);
hBlur(dmpi->planes[0], mpi->planes[0], mpi->w,mpi->h,
dmpi->stride[0], mpi->stride[0], vf->priv->lumaParam.radius, vf->priv->lumaParam.power);
hBlur(dmpi->planes[1], mpi->planes[1], cw,ch,
dmpi->stride[1], mpi->stride[1], vf->priv->chromaParam.radius, vf->priv->chromaParam.power);
hBlur(dmpi->planes[2], mpi->planes[2], cw,ch,
dmpi->stride[2], mpi->stride[2], vf->priv->chromaParam.radius, vf->priv->chromaParam.power);
vBlur(dmpi->planes[0], dmpi->planes[0], mpi->w,mpi->h,
dmpi->stride[0], dmpi->stride[0], vf->priv->lumaParam.radius, vf->priv->lumaParam.power);
vBlur(dmpi->planes[1], dmpi->planes[1], cw,ch,
dmpi->stride[1], dmpi->stride[1], vf->priv->chromaParam.radius, vf->priv->chromaParam.power);
vBlur(dmpi->planes[2], dmpi->planes[2], cw,ch,
dmpi->stride[2], dmpi->stride[2], vf->priv->chromaParam.radius, vf->priv->chromaParam.power);
return vf_next_put_image(vf,dmpi, pts);
}
//===========================================================================//
static int query_format(struct vf_instance *vf, unsigned int fmt){
switch(fmt)
{
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
case IMGFMT_YVU9:
case IMGFMT_444P:
case IMGFMT_422P:
case IMGFMT_411P:
return vf_next_query_format(vf, fmt);
}
return 0;
}
static int vf_open(vf_instance_t *vf, char *args){
int e;
vf->config=config;
vf->put_image=put_image;
// vf->get_image=get_image;
vf->query_format=query_format;
vf->priv=malloc(sizeof(struct vf_priv_s));
memset(vf->priv, 0, sizeof(struct vf_priv_s));
if(args==NULL) return 0;
e=sscanf(args, "%d:%d:%d:%d",
&vf->priv->lumaParam.radius,
&vf->priv->lumaParam.power,
&vf->priv->chromaParam.radius,
&vf->priv->chromaParam.power
);
if(e==2){
vf->priv->chromaParam.radius= vf->priv->lumaParam.radius;
vf->priv->chromaParam.power = vf->priv->lumaParam.power;
}else if(e!=4)
return 0;
if(vf->priv->lumaParam.radius < 0) return 0;
if(vf->priv->chromaParam.radius < 0) return 0;
return 1;
}
const vf_info_t vf_info_boxblur = {
"box blur",
"boxblur",
"Michael Niedermayer",
"",
vf_open,
NULL
};
//===========================================================================//
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