libmpcodecs/vf_delogo.c

   1 /*
   2  * Copyright (C) 2002 Jindrich Makovicka <makovick@gmail.com>
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 /* A very simple tv station logo remover */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <inttypes.h>
  27 #include <math.h>
  28
  29 #include "mp_msg.h"
  30 #include "cpudetect.h"
  31 #include "img_format.h"
  32 #include "mp_image.h"
  33 #include "vf.h"
  34 #include "libvo/fastmemcpy.h"
  35
  36 #include "m_option.h"
  37 #include "m_struct.h"
  38
  39 //===========================================================================//
  40
  41 static struct vf_priv_s {
  42     unsigned int outfmt;
  43     int xoff, yoff, lw, lh, band, show;
  44 } const vf_priv_dflt = {
  45     0,
  46     0, 0, 0, 0, 0, 0
  47 };
  48
  49 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
  50 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
  51
  52 static void delogo(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int width, int height,
  53                    int logo_x, int logo_y, int logo_w, int logo_h, int band, int show, int direct) {
  54     int y, x;
  55     int interp, dist;
  56     uint8_t *xdst, *xsrc;
  57
  58     uint8_t *topleft, *botleft, *topright;
  59     int xclipl, xclipr, yclipt, yclipb;
  60     int logo_x1, logo_x2, logo_y1, logo_y2;
  61
  62     xclipl = MAX(-logo_x, 0);
  63     xclipr = MAX(logo_x+logo_w-width, 0);
  64     yclipt = MAX(-logo_y, 0);
  65     yclipb = MAX(logo_y+logo_h-height, 0);
  66
  67     logo_x1 = logo_x + xclipl;
  68     logo_x2 = logo_x + logo_w - xclipr;
  69     logo_y1 = logo_y + yclipt;
  70     logo_y2 = logo_y + logo_h - yclipb;
  71
  72     topleft = src+logo_y1*srcStride+logo_x1;
  73     topright = src+logo_y1*srcStride+logo_x2-1;
  74     botleft = src+(logo_y2-1)*srcStride+logo_x1;
  75
  76     if (!direct) memcpy_pic(dst, src, width, height, dstStride, srcStride);
  77
  78     dst += (logo_y1+1)*dstStride;
  79     src += (logo_y1+1)*srcStride;
  80
  81     for(y = logo_y1+1; y < logo_y2-1; y++)
  82     {
  83         for (x = logo_x1+1, xdst = dst+logo_x1+1, xsrc = src+logo_x1+1; x < logo_x2-1; x++, xdst++, xsrc++) {
  84             interp = ((topleft[srcStride*(y-logo_y-yclipt)]
  85                        + topleft[srcStride*(y-logo_y-1-yclipt)]
  86                        + topleft[srcStride*(y-logo_y+1-yclipt)])*(logo_w-(x-logo_x))/logo_w
  87                       + (topright[srcStride*(y-logo_y-yclipt)]
  88                          + topright[srcStride*(y-logo_y-1-yclipt)]
  89                          + topright[srcStride*(y-logo_y+1-yclipt)])*(x-logo_x)/logo_w
  90                       + (topleft[x-logo_x-xclipl]
  91                          + topleft[x-logo_x-1-xclipl]
  92                          + topleft[x-logo_x+1-xclipl])*(logo_h-(y-logo_y))/logo_h
  93                       + (botleft[x-logo_x-xclipl]
  94                          + botleft[x-logo_x-1-xclipl]
  95                          + botleft[x-logo_x+1-xclipl])*(y-logo_y)/logo_h
  96                 )/6;
  97 /*              interp = (topleft[srcStride*(y-logo_y)]*(logo_w-(x-logo_x))/logo_w
  98                           + topright[srcStride*(y-logo_y)]*(x-logo_x)/logo_w
  99                           + topleft[x-logo_x]*(logo_h-(y-logo_y))/logo_h
 100                           + botleft[x-logo_x]*(y-logo_y)/logo_h
 101                           )/2;*/
 102             if (y >= logo_y+band && y < logo_y+logo_h-band && x >= logo_x+band && x < logo_x+logo_w-band) {
 103                     *xdst = interp;
 104             } else {
 105                 dist = 0;
 106                 if (x < logo_x+band) dist = MAX(dist, logo_x-x+band);
 107                 else if (x >= logo_x+logo_w-band) dist = MAX(dist, x-(logo_x+logo_w-1-band));
 108                 if (y < logo_y+band) dist = MAX(dist, logo_y-y+band);
 109                 else if (y >= logo_y+logo_h-band) dist = MAX(dist, y-(logo_y+logo_h-1-band));
 110                 *xdst = (*xsrc*dist + interp*(band-dist))/band;
 111                 if (show && (dist == band-1)) *xdst = 0;
 112             }
 113         }
 114
 115         dst+= dstStride;
 116         src+= srcStride;
 117     }
 118 }
 119
 120 static int config(struct vf_instance *vf,
 121                   int width, int height, int d_width, int d_height,
 122                   unsigned int flags, unsigned int outfmt){
 123
 124     return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
 125 }
 126
 127
 128 static void get_image(struct vf_instance *vf, mp_image_t *mpi){
 129     if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
 130     if(mpi->imgfmt!=vf->priv->outfmt) return; // colorspace differ
 131     // ok, we can do pp in-place (or pp disabled):
 132     vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
 133                           mpi->type, mpi->flags, mpi->w, mpi->h);
 134     mpi->planes[0]=vf->dmpi->planes[0];
 135     mpi->stride[0]=vf->dmpi->stride[0];
 136     mpi->width=vf->dmpi->width;
 137     if(mpi->flags&MP_IMGFLAG_PLANAR){
 138         mpi->planes[1]=vf->dmpi->planes[1];
 139         mpi->planes[2]=vf->dmpi->planes[2];
 140         mpi->stride[1]=vf->dmpi->stride[1];
 141         mpi->stride[2]=vf->dmpi->stride[2];
 142     }
 143     mpi->flags|=MP_IMGFLAG_DIRECT;
 144 }
 145
 146 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
 147     mp_image_t *dmpi;
 148
 149     if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 150         // no DR, so get a new image! hope we'll get DR buffer:
 151         vf->dmpi=vf_get_image(vf->next,vf->priv->outfmt,
 152                               MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
 153                               mpi->w,mpi->h);
 154     }
 155     dmpi= vf->dmpi;
 156
 157     delogo(dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h,
 158            vf->priv->xoff, vf->priv->yoff, vf->priv->lw, vf->priv->lh, vf->priv->band, vf->priv->show,
 159            mpi->flags&MP_IMGFLAG_DIRECT);
 160     delogo(dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w/2, mpi->h/2,
 161            vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show,
 162            mpi->flags&MP_IMGFLAG_DIRECT);
 163     delogo(dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w/2, mpi->h/2,
 164            vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show,
 165            mpi->flags&MP_IMGFLAG_DIRECT);
 166
 167     vf_clone_mpi_attributes(dmpi, mpi);
 168
 169     return vf_next_put_image(vf,dmpi, pts);
 170 }
 171
 172 static void uninit(struct vf_instance *vf){
 173     if(!vf->priv) return;
 174
 175     free(vf->priv);
 176     vf->priv=NULL;
 177 }
 178
 179 //===========================================================================//
 180
 181 static int query_format(struct vf_instance *vf, unsigned int fmt){
 182     switch(fmt)
 183     {
 184     case IMGFMT_YV12:
 185     case IMGFMT_I420:
 186     case IMGFMT_IYUV:
 187         return vf_next_query_format(vf,vf->priv->outfmt);
 188     }
 189     return 0;
 190 }
 191
 192 static const unsigned int fmt_list[]={
 193     IMGFMT_YV12,
 194     IMGFMT_I420,
 195     IMGFMT_IYUV,
 196     0
 197 };
 198
 199 static int vf_open(vf_instance_t *vf, char *args){
 200     vf->config=config;
 201     vf->put_image=put_image;
 202     vf->get_image=get_image;
 203     vf->query_format=query_format;
 204     vf->uninit=uninit;
 205
 206     mp_msg(MSGT_VFILTER, MSGL_V, "delogo: %d x %d, %d x %d, band = %d\n",
 207            vf->priv->xoff, vf->priv->yoff,
 208            vf->priv->lw, vf->priv->lh,
 209            vf->priv->band);
 210
 211     vf->priv->show = 0;
 212
 213     if (vf->priv->band < 0) {
 214         vf->priv->band = 4;
 215         vf->priv->show = 1;
 216     }
 217
 218
 219     vf->priv->lw += vf->priv->band*2;
 220     vf->priv->lh += vf->priv->band*2;
 221     vf->priv->xoff -= vf->priv->band;
 222     vf->priv->yoff -= vf->priv->band;
 223
 224     // check csp:
 225     vf->priv->outfmt=vf_match_csp(&vf->next,fmt_list,IMGFMT_YV12);
 226     if(!vf->priv->outfmt)
 227     {
 228         uninit(vf);
 229         return 0; // no csp match :(
 230     }
 231
 232     return 1;
 233 }
 234
 235 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
 236 static const m_option_t vf_opts_fields[] = {
 237     { "x", ST_OFF(xoff), CONF_TYPE_INT, 0, 0, 0, NULL },
 238     { "y", ST_OFF(yoff), CONF_TYPE_INT, 0, 0, 0, NULL },
 239     { "w", ST_OFF(lw), CONF_TYPE_INT, 0, 0, 0, NULL },
 240     { "h", ST_OFF(lh), CONF_TYPE_INT, 0, 0, 0, NULL },
 241     { "t", ST_OFF(band), CONF_TYPE_INT, 0, 0, 0, NULL },
 242     { "band", ST_OFF(band), CONF_TYPE_INT, 0, 0, 0, NULL }, // alias
 243     { NULL, NULL, 0, 0, 0, 0, NULL }
 244 };
 245
 246 static const m_struct_t vf_opts = {
 247     "delogo",
 248     sizeof(struct vf_priv_s),
 249     &vf_priv_dflt,
 250     vf_opts_fields
 251 };
 252
 253 const vf_info_t vf_info_delogo = {
 254     "simple logo remover",
 255     "delogo",
 256     "Jindrich Makovicka, Alex Beregszaszi",
 257     "",
 258     vf_open,
 259     &vf_opts
 260 };
 261
 262 //===========================================================================//