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mpv/libmpcodecs/vf_delogo.c

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/*
* Copyright (C) 2002 Jindrich Makovicka <makovick@gmail.com>
*
* 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.
*/
/* A very simple tv station logo remover */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <limits.h>
#include <errno.h>
#include <math.h>
#include "mp_msg.h"
#include "cpudetect.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libvo/fastmemcpy.h"
#include "m_option.h"
#include "m_struct.h"
//===========================================================================//
static struct vf_priv_s {
unsigned int outfmt;
int xoff, yoff, lw, lh, band, show;
const char *file;
struct timed_rectangle {
int ts, x, y, w, h, b;
} *timed_rect;
int n_timed_rect;
int cur_timed_rect;
} const vf_priv_dflt = {
0,
0, 0, 0, 0, 0, 0,
NULL, NULL, 0, 0,
};
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
/**
* Adjust the coordinates to suit the band width
* Also print a notice in verbose mode
*/
static void fix_band(struct vf_priv_s *p)
{
p->show = 0;
if (p->band < 0) {
p->band = 4;
p->show = 1;
}
p->lw += p->band*2;
p->lh += p->band*2;
p->xoff -= p->band;
p->yoff -= p->band;
mp_msg(MSGT_VFILTER, MSGL_V, "delogo: %d x %d, %d x %d, band = %d\n",
p->xoff, p->yoff, p->lw, p->lh, p->band);
}
static void update_sub(struct vf_priv_s *p, double pts)
{
int ipts = pts * 1000;
int tr = p->cur_timed_rect;
while (tr < p->n_timed_rect - 1 && ipts >= p->timed_rect[tr + 1].ts)
tr++;
while (tr >= 0 && ipts < p->timed_rect[tr].ts)
tr--;
if (tr == p->cur_timed_rect)
return;
p->cur_timed_rect = tr;
if (tr >= 0) {
p->xoff = p->timed_rect[tr].x;
p->yoff = p->timed_rect[tr].y;
p->lw = p->timed_rect[tr].w;
p->lh = p->timed_rect[tr].h;
p->band = p->timed_rect[tr].b;
} else {
p->xoff = p->yoff = p->lw = p->lh = p->band = 0;
}
fix_band(p);
}
static void delogo(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int width, int height,
int logo_x, int logo_y, int logo_w, int logo_h, int band, int show, int direct) {
int y, x;
int interp, dist;
uint8_t *xdst, *xsrc;
uint8_t *topleft, *botleft, *topright;
int xclipl, xclipr, yclipt, yclipb;
int logo_x1, logo_x2, logo_y1, logo_y2;
xclipl = MAX(-logo_x, 0);
xclipr = MAX(logo_x+logo_w-width, 0);
yclipt = MAX(-logo_y, 0);
yclipb = MAX(logo_y+logo_h-height, 0);
logo_x1 = logo_x + xclipl;
logo_x2 = logo_x + logo_w - xclipr;
logo_y1 = logo_y + yclipt;
logo_y2 = logo_y + logo_h - yclipb;
topleft = src+logo_y1*srcStride+logo_x1;
topright = src+logo_y1*srcStride+logo_x2-1;
botleft = src+(logo_y2-1)*srcStride+logo_x1;
if (!direct) memcpy_pic(dst, src, width, height, dstStride, srcStride);
dst += (logo_y1+1)*dstStride;
src += (logo_y1+1)*srcStride;
for(y = logo_y1+1; y < logo_y2-1; y++)
{
for (x = logo_x1+1, xdst = dst+logo_x1+1, xsrc = src+logo_x1+1; x < logo_x2-1; x++, xdst++, xsrc++) {
interp = ((topleft[srcStride*(y-logo_y-yclipt)]
+ topleft[srcStride*(y-logo_y-1-yclipt)]
+ topleft[srcStride*(y-logo_y+1-yclipt)])*(logo_w-(x-logo_x))/logo_w
+ (topright[srcStride*(y-logo_y-yclipt)]
+ topright[srcStride*(y-logo_y-1-yclipt)]
+ topright[srcStride*(y-logo_y+1-yclipt)])*(x-logo_x)/logo_w
+ (topleft[x-logo_x-xclipl]
+ topleft[x-logo_x-1-xclipl]
+ topleft[x-logo_x+1-xclipl])*(logo_h-(y-logo_y))/logo_h
+ (botleft[x-logo_x-xclipl]
+ botleft[x-logo_x-1-xclipl]
+ botleft[x-logo_x+1-xclipl])*(y-logo_y)/logo_h
)/6;
/* interp = (topleft[srcStride*(y-logo_y)]*(logo_w-(x-logo_x))/logo_w
+ topright[srcStride*(y-logo_y)]*(x-logo_x)/logo_w
+ topleft[x-logo_x]*(logo_h-(y-logo_y))/logo_h
+ botleft[x-logo_x]*(y-logo_y)/logo_h
)/2;*/
if (y >= logo_y+band && y < logo_y+logo_h-band && x >= logo_x+band && x < logo_x+logo_w-band) {
*xdst = interp;
} else {
dist = 0;
if (x < logo_x+band) dist = MAX(dist, logo_x-x+band);
else if (x >= logo_x+logo_w-band) dist = MAX(dist, x-(logo_x+logo_w-1-band));
if (y < logo_y+band) dist = MAX(dist, logo_y-y+band);
else if (y >= logo_y+logo_h-band) dist = MAX(dist, y-(logo_y+logo_h-1-band));
*xdst = (*xsrc*dist + interp*(band-dist))/band;
if (show && (dist == band-1)) *xdst = 0;
}
}
dst+= dstStride;
src+= srcStride;
}
}
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 void get_image(struct vf_instance *vf, mp_image_t *mpi){
if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
if(mpi->imgfmt!=vf->priv->outfmt) return; // colorspace differ
// 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 int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
mp_image_t *dmpi;
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,vf->priv->outfmt,
MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
mpi->w,mpi->h);
}
dmpi= vf->dmpi;
if (vf->priv->timed_rect)
update_sub(vf->priv, pts);
delogo(dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h,
vf->priv->xoff, vf->priv->yoff, vf->priv->lw, vf->priv->lh, vf->priv->band, vf->priv->show,
mpi->flags&MP_IMGFLAG_DIRECT);
delogo(dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w/2, mpi->h/2,
vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show,
mpi->flags&MP_IMGFLAG_DIRECT);
delogo(dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w/2, mpi->h/2,
vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show,
mpi->flags&MP_IMGFLAG_DIRECT);
vf_clone_mpi_attributes(dmpi, mpi);
return vf_next_put_image(vf,dmpi, pts);
}
static void uninit(struct vf_instance *vf){
if(!vf->priv) return;
free(vf->priv);
vf->priv=NULL;
}
//===========================================================================//
static int query_format(struct vf_instance *vf, unsigned int fmt){
switch(fmt)
{
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
return vf_next_query_format(vf,vf->priv->outfmt);
}
return 0;
}
static const unsigned int fmt_list[]={
IMGFMT_YV12,
IMGFMT_I420,
IMGFMT_IYUV,
0
};
static int load_timed_rectangles(struct vf_priv_s *delogo)
{
FILE *f;
char line[2048];
int lineno = 0, p;
double ts, last_ts = 0;
struct timed_rectangle *rect = NULL, *nr;
int n_rect = 0, alloc_rect = 0;
f = fopen(delogo->file, "r");
if (!f) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "delogo: unable to load %s: %s\n",
delogo->file, strerror(errno));
return -1;
}
while (fgets(line, sizeof(line), f)) {
lineno++;
if (*line == '#' || *line == '\n')
continue;
if (n_rect == alloc_rect) {
if (alloc_rect > INT_MAX / 2 / (int)sizeof(*rect)) {
mp_msg(MSGT_VFILTER, MSGL_WARN,
"delogo: too many rectangles\n");
goto load_error;
}
alloc_rect = alloc_rect ? 2 * alloc_rect : 256;
nr = realloc(rect, alloc_rect * sizeof(*rect));
if (!nr) {
mp_msg(MSGT_VFILTER, MSGL_WARN, "delogo: out of memory\n");
goto load_error;
}
rect = nr;
}
nr = rect + n_rect;
memset(nr, 0, sizeof(*nr));
p = sscanf(line, "%lf %d:%d:%d:%d:%d",
&ts, &nr->x, &nr->y, &nr->w, &nr->h, &nr->b);
if ((p == 2 && !nr->x) || p == 5 || p == 6) {
if (ts <= last_ts)
mp_msg(MSGT_VFILTER, MSGL_WARN, "delogo: %s:%d: wrong time\n",
delogo->file, lineno);
nr->ts = 1000 * ts + 0.5;
n_rect++;
} else {
mp_msg(MSGT_VFILTER, MSGL_WARN, "delogo: %s:%d: syntax error\n",
delogo->file, lineno);
}
}
fclose(f);
if (!n_rect) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "delogo: %s: no rectangles found\n",
delogo->file);
free(rect);
return -1;
}
nr = realloc(rect, n_rect * sizeof(*rect));
if (nr)
rect = nr;
delogo->timed_rect = rect;
delogo->n_timed_rect = n_rect;
return 0;
load_error:
free(rect);
fclose(f);
return -1;
}
static int vf_open(vf_instance_t *vf, char *args){
vf->config=config;
vf->put_image=put_image;
vf->get_image=get_image;
vf->query_format=query_format;
vf->uninit=uninit;
if (vf->priv->file) {
if (load_timed_rectangles(vf->priv))
return 0;
mp_msg(MSGT_VFILTER, MSGL_V, "delogo: %d from %s\n",
vf->priv->n_timed_rect, vf->priv->file);
vf->priv->cur_timed_rect = -1;
}
fix_band(vf->priv);
// check csp:
vf->priv->outfmt=vf_match_csp(&vf->next,fmt_list,IMGFMT_YV12);
if(!vf->priv->outfmt)
{
uninit(vf);
return 0; // no csp match :(
}
return 1;
}
#define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
static const m_option_t vf_opts_fields[] = {
{ "x", ST_OFF(xoff), CONF_TYPE_INT, 0, 0, 0, NULL },
{ "y", ST_OFF(yoff), CONF_TYPE_INT, 0, 0, 0, NULL },
{ "w", ST_OFF(lw), CONF_TYPE_INT, 0, 0, 0, NULL },
{ "h", ST_OFF(lh), CONF_TYPE_INT, 0, 0, 0, NULL },
{ "t", ST_OFF(band), CONF_TYPE_INT, 0, 0, 0, NULL },
{ "band", ST_OFF(band), CONF_TYPE_INT, 0, 0, 0, NULL }, // alias
{ "file", ST_OFF(file), CONF_TYPE_STRING, 0, 0, 0, NULL },
{ NULL, NULL, 0, 0, 0, 0, NULL }
};
static const m_struct_t vf_opts = {
"delogo",
sizeof(struct vf_priv_s),
&vf_priv_dflt,
vf_opts_fields
};
const vf_info_t vf_info_delogo = {
"simple logo remover",
"delogo",
"Jindrich Makovicka, Alex Beregszaszi",
"",
vf_open,
&vf_opts
};
//===========================================================================//
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