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/*
* Copyright (C) 2006 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 <math.h>
#include <inttypes.h>
#include "config.h"
#include "mp_msg.h"
#include "cpudetect.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libavcodec/avcodec.h"
#include "libavutil/eval.h"
struct vf_priv_s {
AVExpr * e[3];
int framenum;
mp_image_t *mpi;
};
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 double getpix(struct vf_instance *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(void *vf, double x, double y){
return getpix(vf, x, y, 0);
}
static double cb(void *vf, double x, double y){
return getpix(vf, x, y, 1);
}
static double cr(void *vf, double x, double y){
return getpix(vf, x, y, 2);
}
static int put_image(struct vf_instance *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] = av_expr_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 *vf){
av_free(vf->priv);
vf->priv=NULL;
}
//===========================================================================//
static int vf_open(vf_instance_t *vf, char *args){
char eq[3][2000] = { { 0 }, { 0 }, { 0 } };
int plane, res;
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
};
res = av_expr_parse(&vf->priv->e[plane], eq[plane], const_names, NULL, NULL, func2_names, func2, 0, NULL);
if (res < 0) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "geq: error loading equation `%s'\n", eq[plane]);
return 0;
}
}
return 1;
}
const vf_info_t vf_info_geq = {
"generic equation filter",
"geq",
"Michael Niedermayer",
"",
vf_open,
NULL
};
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