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/*
Copyright (C) 2006 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <inttypes.h>
#include "config.h"
#include "mp_msg.h"
#include "cpudetect.h"
// Needed to bring in lrintf.
#define HAVE_AV_CONFIG_H
#include "libavcodec/avcodec.h"
#include "libavcodec/dsputil.h"
#include "libavcodec/eval.h"
#include "libavutil/common.h"
/* FIXME: common.h defines printf away when HAVE_AV_CONFIG
* is defined, but mp_image.h needs printf.
*/
#undef printf
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libvo/fastmemcpy.h"
struct vf_priv_s {
AVEvalExpr * e[3];
int framenum;
mp_image_t *mpi;
};
static int config(struct vf_instance_s* 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 void get_image(struct vf_instance_s* vf, mp_image_t *mpi){
if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
// ok, we can do pp in-place (or pp disabled):
vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
mpi->type, mpi->flags, mpi->w, mpi->h);
mpi->planes[0]=vf->dmpi->planes[0];
mpi->stride[0]=vf->dmpi->stride[0];
mpi->width=vf->dmpi->width;
if(mpi->flags&MP_IMGFLAG_PLANAR){
mpi->planes[1]=vf->dmpi->planes[1];
mpi->planes[2]=vf->dmpi->planes[2];
mpi->stride[1]=vf->dmpi->stride[1];
mpi->stride[2]=vf->dmpi->stride[2];
}
mpi->flags|=MP_IMGFLAG_DIRECT;
}
static double inline getpix(struct vf_instance_s* vf, double x, double y, int plane){
int xi, yi;
mp_image_t *mpi= vf->priv->mpi;
int stride= mpi->stride[plane];
uint8_t *src= mpi->planes[plane];
xi=x= FFMIN(FFMAX(x, 0), (mpi->w >> (plane ? mpi->chroma_x_shift : 0))-1);
yi=y= FFMIN(FFMAX(y, 0), (mpi->h >> (plane ? mpi->chroma_y_shift : 0))-1);
x-=xi;
y-=yi;
return
(1-y)*((1-x)*src[xi + yi * stride] + x*src[xi + 1 + yi * stride])
+ y *((1-x)*src[xi + (yi+1) * stride] + x*src[xi + 1 + (yi+1) * stride]);
}
//FIXME cubic interpolate
//FIXME keep the last few frames
static double lum(struct vf_instance_s* vf, double x, double y){
return getpix(vf, x, y, 0);
}
static double cb(struct vf_instance_s* vf, double x, double y){
return getpix(vf, x, y, 1);
}
static double cr(struct vf_instance_s* vf, double x, double y){
return getpix(vf, x, y, 2);
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
mp_image_t *dmpi;
int x,y, plane;
if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
// no DR, so get a new image! hope we'll get DR buffer:
vf->dmpi=vf_get_image(vf->next,mpi->imgfmt, MP_IMGTYPE_TEMP,
MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
mpi->w,mpi->h);
}
dmpi= vf->dmpi;
vf->priv->mpi= mpi;
vf_clone_mpi_attributes(dmpi, mpi);
for(plane=0; plane<3; plane++){
int w= mpi->w >> (plane ? mpi->chroma_x_shift : 0);
int h= mpi->h >> (plane ? mpi->chroma_y_shift : 0);
uint8_t *dst = dmpi->planes[plane];
int dst_stride= dmpi->stride[plane];
double const_values[]={
M_PI,
M_E,
0,
0,
w,
h,
vf->priv->framenum,
w/(double)mpi->w,
h/(double)mpi->h,
0
};
if (!vf->priv->e[plane]) continue;
for(y=0; y<h; y++){
const_values[3]=y;
for(x=0; x<w; x++){
const_values[2]=x;
dst[x+y* dst_stride]= ff_parse_eval(vf->priv->e[plane], const_values, vf);
}
}
}
vf->priv->framenum++;
return vf_next_put_image(vf,dmpi, pts);
}
static void uninit(struct vf_instance_s* vf){
if(!vf->priv) return;
av_free(vf->priv);
vf->priv=NULL;
}
//===========================================================================//
static int open(vf_instance_t *vf, char* args){
char eq[3][2000] = { { 0 }, { 0 }, { 0 } };
int plane;
vf->config=config;
vf->put_image=put_image;
// vf->get_image=get_image;
vf->uninit=uninit;
vf->priv=av_malloc(sizeof(struct vf_priv_s));
memset(vf->priv, 0, sizeof(struct vf_priv_s));
if (args) sscanf(args, "%1999[^:]:%1999[^:]:%1999[^:]", eq[0], eq[1], eq[2]);
if (!eq[1][0]) strncpy(eq[1], eq[0], sizeof(eq[0])-1);
if (!eq[2][0]) strncpy(eq[2], eq[1], sizeof(eq[0])-1);
for(plane=0; plane<3; plane++){
static const char *const_names[]={
"PI",
"E",
"X",
"Y",
"W",
"H",
"N",
"SW",
"SH",
NULL
};
static const char *func2_names[]={
"lum",
"cb",
"cr",
"p",
NULL
};
double (*func2[])(void *, double, double)={
lum,
cb,
cr,
plane==0 ? lum : (plane==1 ? cb : cr),
NULL
};
char * a;
vf->priv->e[plane] = ff_parse(eq[plane], const_names, NULL, NULL, func2, func2_names, &a);
if (!vf->priv->e[plane]) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "geq: error loading equation `%s': %s\n", eq[plane], a);
}
}
return 1;
}
vf_info_t vf_info_geq = {
"generic equation filter",
"geq",
"Michael Niedermayer",
"",
open,
NULL
};
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