diff options
author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-05-12 19:06:54 +0000 |
---|---|---|
committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-05-12 19:06:54 +0000 |
commit | 7d814ac7501d2975e77276cff283833b7a32767d (patch) | |
tree | 091378e406df458fa15a8ae0ba30afc23a3a8983 /libmpcodecs/vf_cropdetect.c | |
parent | 6ab0d987add91595f0d01116d9506d06620719d1 (diff) | |
download | mpv-7d814ac7501d2975e77276cff283833b7a32767d.tar.bz2 mpv-7d814ac7501d2975e77276cff283833b7a32767d.tar.xz |
new filter, to detect best crop size
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6062 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpcodecs/vf_cropdetect.c')
-rw-r--r-- | libmpcodecs/vf_cropdetect.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/libmpcodecs/vf_cropdetect.c b/libmpcodecs/vf_cropdetect.c new file mode 100644 index 0000000000..a535152cf0 --- /dev/null +++ b/libmpcodecs/vf_cropdetect.c @@ -0,0 +1,135 @@ +#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; +}; + +static int checkline(unsigned char* src,int stride,int len,int bpp){ + int total=0; + int div=len; + int x; + 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; + return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt); +} + +static void 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; + +//static int checkline(unsigned char* src,int stride,int len,int bpp){ + + 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-x)&(~1),(vf->priv->y2-y)&(~1),x,y + ); + + 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 + return 1; +} + +vf_info_t vf_info_cropdetect = { + "autodetect crop size", + "cropdetect", + "A'rpi", + "", + open +}; + +//===========================================================================// |