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/*
Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <assert.h>
#include "../config.h"
#include "../mp_msg.h"
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "../libvo/fastmemcpy.h"
//===========================================================================//
typedef struct FilterParam{
int interleave;
int swap;
}FilterParam;
struct vf_priv_s {
FilterParam lumaParam;
FilterParam chromaParam;
};
/***************************************************************************/
static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, int interleave, int swap){
const int a= swap;
const int b= 1-a;
const int m= h>>1;
int y;
switch(interleave){
case -1:
for(y=0; y < m; y++){
memcpy(dst + dstStride* y , src + srcStride*(y*2 + a), w);
memcpy(dst + dstStride*(y + m), src + srcStride*(y*2 + b), w);
}
break;
case 0:
for(y=0; y < m; y++){
memcpy(dst + dstStride* y*2 , src + srcStride*(y*2 + a), w);
memcpy(dst + dstStride*(y*2+1), src + srcStride*(y*2 + b), w);
}
break;
case 1:
for(y=0; y < m; y++){
memcpy(dst + dstStride*(y*2+a), src + srcStride* y , w);
memcpy(dst + dstStride*(y*2+b), src + srcStride*(y + m), w);
}
break;
}
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){
int w;
FilterParam *luma = &vf->priv->lumaParam;
FilterParam *chroma= &vf->priv->chromaParam;
mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
mpi->w,mpi->h);
if(mpi->flags&MP_IMGFLAG_PLANAR)
w= mpi->w;
else
w= mpi->w * mpi->bpp/8;
interleave(dmpi->planes[0], mpi->planes[0],
w, mpi->h, dmpi->stride[0], mpi->stride[0], luma->interleave, luma->swap);
if(mpi->flags&MP_IMGFLAG_PLANAR){
int cw= mpi->w >> mpi->chroma_x_shift;
int ch= mpi->h >> mpi->chroma_y_shift;
interleave(dmpi->planes[1], mpi->planes[1], cw,ch,
dmpi->stride[1], mpi->stride[1], chroma->interleave, luma->swap);
interleave(dmpi->planes[2], mpi->planes[2], cw,ch,
dmpi->stride[2], mpi->stride[2], chroma->interleave, luma->swap);
}
return vf_next_put_image(vf,dmpi);
}
//===========================================================================//
static void parse(FilterParam *fp, char* args){
char *pos;
char *max= strchr(args, ':');
if(!max) max= args + strlen(args);
pos= strchr(args, 's');
if(pos && pos<max) fp->swap=1;
pos= strchr(args, 'i');
if(pos && pos<max) fp->interleave=1;
pos= strchr(args, 'd');
if(pos && pos<max) fp->interleave=-1;
}
static int open(vf_instance_t *vf, char* args){
vf->put_image=put_image;
// vf->get_image=get_image;
vf->priv=malloc(sizeof(struct vf_priv_s));
memset(vf->priv, 0, sizeof(struct vf_priv_s));
if(args)
{
char *arg2= strchr(args,':');
if(arg2) parse(&vf->priv->chromaParam, arg2+1);
parse(&vf->priv->lumaParam, args);
}
return 1;
}
vf_info_t vf_info_il = {
"(de)interleave",
"il",
"Michael Niedermayer",
"",
open,
NULL
};
//===========================================================================//
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