simple logo remover

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10810 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 247 insertions, 0 deletions

diff --git a/libmpcodecs/vf_delogo.c b/libmpcodecs/vf_delogo.c
new file mode 100644
index 0000000000..3455fb1185
--- /dev/null
+++ b/libmpcodecs/vf_delogo.c
@@ -0,0 +1,247 @@
+/*
+  Copyright (C) 2002 Jindrich Makovicka <makovick@kmlinux.fjfi.cvut.cz>
+
+  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
+*/
+
+/* A very simple tv station logo remover */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+#include <math.h>
+
+#include "../config.h"
+#include "../mp_msg.h"
+#include "../cpudetect.h"
+
+#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 {
+    unsigned int outfmt;
+    int xoff, yoff, lw, lh, band, show;
+};
+
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#define MAX(a,b) (((a) > (b)) ? (a) : (b))
+
+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 y, x;
+    int interp, dist;
+    uint8_t *xdst, *xsrc;
+    
+    uint8_t *topleft, *botleft, *topright;
+    int xclipl, xclipr, yclipt, yclipb;
+    
+    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);
+
+    topleft = src+MAX(logo_y,0)*srcStride+MAX(logo_x,0);
+    topright = src+MAX(logo_y,0)*srcStride+MIN(logo_x+logo_w-1,width-1);
+    botleft = src+MIN(logo_y+logo_h-1,height-1)*srcStride+MAX(logo_x,0);
+
+    for(y=0; y<height; y++)
+    {
+	for (x = 0, xdst = dst, xsrc = src; x < width; x++, xdst++, xsrc++) {
+	    if (y >= logo_y && y < logo_y+logo_h && x >= logo_x && x < logo_x+logo_w) {
+		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) *xdst = 0;
+		}
+	    } else {
+		*xdst = *xsrc;
+	    }
+	}
+
+	dst+= dstStride;
+	src+= srcStride;
+    }
+}
+
+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
+    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_s* vf, mp_image_t *mpi){
+    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;
+
+    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);
+    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);
+    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);
+
+    vf_clone_mpi_attributes(dmpi, mpi);
+
+    return vf_next_put_image(vf,dmpi);
+}
+
+static void uninit(struct vf_instance_s* vf){
+    if(!vf->priv) return;
+
+    free(vf->priv);
+    vf->priv=NULL;
+}
+
+//===========================================================================//
+
+static int query_format(struct vf_instance_s* 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 unsigned int fmt_list[]={
+    IMGFMT_YV12,
+    IMGFMT_I420,
+    IMGFMT_IYUV,
+    0
+};
+
+static int open(vf_instance_t *vf, char* args){
+    int res;
+    
+    vf->config=config;
+    vf->put_image=put_image;
+    vf->get_image=get_image;
+    vf->query_format=query_format;
+    vf->uninit=uninit;
+    vf->priv=malloc(sizeof(struct vf_priv_s));
+    memset(vf->priv, 0, sizeof(struct vf_priv_s));
+
+    if (args) res = sscanf(args, "%d:%d:%d:%d:%d",
+			   &vf->priv->xoff, &vf->priv->yoff,
+			   &vf->priv->lw, &vf->priv->lh,
+			   &vf->priv->band);
+
+    if (res != 5) {
+	mp_msg(MSGT_VFILTER, MSGL_ERR, "deLogo: syntax is \"delogo=xoff:yoff:width:height:band\"\n");
+	uninit(vf);
+	return 0;
+    }
+
+    mp_msg(MSGT_VFILTER, MSGL_INFO, "deLogo: %d x %d, %d ; %d ; band = %d\n",
+	   &vf->priv->lw, &vf->priv->lh,
+	   &vf->priv->xoff, &vf->priv->yoff,
+	   &vf->priv->band);
+
+    vf->priv->show = 0;
+
+    if (vf->priv->band < 0) {
+	vf->priv->band = 2;
+	vf->priv->show = 1;
+    }
+    
+
+    vf->priv->lw += vf->priv->band*2;
+    vf->priv->lh += vf->priv->band*2;
+    vf->priv->xoff -= vf->priv->band;
+    vf->priv->yoff -= vf->priv->band;
+
+    // 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;
+}
+
+vf_info_t vf_info_delogo = {
+    "simple logo remover",
+    "delogo",
+    "Jindrich Makovicka",
+    "",
+    open,
+    NULL
+};
+
+//===========================================================================//