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mpv/libmpcodecs/vf_cropdetect.c
albeu 33b62af947 Add the new -vf option wich is the same as vop in reverse order.
Syntax is we decided, so you can give the nomes or not with both
vop and vf. vf take precedence over vop.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9594 b3059339-0415-0410-9bf9-f77b7e298cf2
2003-03-15 18:01:02 +00:00

141 lines
3.1 KiB
C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "../config.h"
#include "../mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "../libvo/fastmemcpy.h"
#include "../postproc/rgb2rgb.h"
struct vf_priv_s {
int x1,y1,x2,y2;
int limit;
int fno;
};
static int checkline(unsigned char* src,int stride,int len,int bpp){
int total=0;
int div=len;
switch(bpp){
case 1:
while(--len>=0){
total+=src[0]; src+=stride;
}
break;
case 3:
case 4:
while(--len>=0){
total+=src[0]+src[1]+src[2]; src+=stride;
}
div*=3;
break;
}
total/=div;
// printf("total=%d\n",total);
return total;
}
//===========================================================================//
static int config(struct vf_instance_s* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt){
vf->priv->x1=width;
vf->priv->y1=height;
vf->priv->x2=0;
vf->priv->y2=0;
vf->priv->fno=0;
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){
mp_image_t *dmpi;
int bpp=mpi->bpp/8;
int x,y;
// hope we'll get DR buffer:
dmpi=vf_get_image(vf->next,mpi->imgfmt,
MP_IMGTYPE_EXPORT, 0,
mpi->w, mpi->h);
dmpi->planes[0]=mpi->planes[0];
dmpi->planes[1]=mpi->planes[1];
dmpi->planes[2]=mpi->planes[2];
dmpi->stride[0]=mpi->stride[0];
dmpi->stride[1]=mpi->stride[1];
dmpi->stride[2]=mpi->stride[2];
dmpi->width=mpi->width;
dmpi->height=mpi->height;
if(++vf->priv->fno>2){ // ignore first 2 frames - they may be empty
for(y=0;y<vf->priv->y1;y++){
if(checkline(mpi->planes[0]+mpi->stride[0]*y,bpp,mpi->w,bpp)>vf->priv->limit){
vf->priv->y1=y;
break;
}
}
for(y=mpi->h-1;y>vf->priv->y2;y--){
if(checkline(mpi->planes[0]+mpi->stride[0]*y,bpp,mpi->w,bpp)>vf->priv->limit){
vf->priv->y2=y;
break;
}
}
for(y=0;y<vf->priv->x1;y++){
if(checkline(mpi->planes[0]+bpp*y,mpi->stride[0],mpi->h,bpp)>vf->priv->limit){
vf->priv->x1=y;
break;
}
}
for(y=mpi->w-1;y>vf->priv->x2;y--){
if(checkline(mpi->planes[0]+bpp*y,mpi->stride[0],mpi->h,bpp)>vf->priv->limit){
vf->priv->x2=y;
break;
}
}
x=(vf->priv->x1+1)&(~1);
y=(vf->priv->y1+1)&(~1);
printf("crop area: X: %d..%d Y: %d..%d (-vop crop=%d:%d:%d:%d)\n",
vf->priv->x1,vf->priv->x2,
vf->priv->y1,vf->priv->y2,
(vf->priv->x2+1-x)&(~1),(vf->priv->y2+1-y)&(~1),x,y
);
}
return vf_next_put_image(vf,dmpi);
}
//===========================================================================//
static int open(vf_instance_t *vf, char* args){
vf->config=config;
vf->put_image=put_image;
vf->priv=malloc(sizeof(struct vf_priv_s));
vf->priv->limit=24; // should be option
if(args) vf->priv->limit=atoi(args);
return 1;
}
vf_info_t vf_info_cropdetect = {
"autodetect crop size",
"cropdetect",
"A'rpi",
"",
open,
NULL
};
//===========================================================================//