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 "config.h"
  30 #include "mp_msg.h"
  31 #include "cpudetect.h"
  32
  33 #if HAVE_MALLOC_H
  34 #include <malloc.h>
  35 #endif
  36
  37 #include "img_format.h"
  38 #include "mp_image.h"
  39 #include "vf.h"
  40 #include "libvo/fastmemcpy.h"
  41
  42 #include "m_option.h"
  43 #include "m_struct.h"
  44
  45 //===========================================================================//
  46
  47 static struct vf_priv_s {
  48     unsigned int outfmt;
  49     int xoff, yoff, lw, lh, band, show;
  50 } const vf_priv_dflt = {
  51     0,
  52     0, 0, 0, 0, 0, 0
  53 };
  54
  55 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
  56 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
  57
  58 static void delogo(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int width, int height,
  59                    int logo_x, int logo_y, int logo_w, int logo_h, int band, int show, int direct) {
  60     int y, x;
  61     int interp, dist;
  62     uint8_t *xdst, *xsrc;
  63
  64     uint8_t *topleft, *botleft, *topright;
  65     int xclipl, xclipr, yclipt, yclipb;
  66     int logo_x1, logo_x2, logo_y1, logo_y2;
  67
  68     xclipl = MAX(-logo_x, 0);
  69     xclipr = MAX(logo_x+logo_w-width, 0);
  70     yclipt = MAX(-logo_y, 0);
  71     yclipb = MAX(logo_y+logo_h-height, 0);
  72
  73     logo_x1 = logo_x + xclipl;
  74     logo_x2 = logo_x + logo_w - xclipr;
  75     logo_y1 = logo_y + yclipt;
  76     logo_y2 = logo_y + logo_h - yclipb;
  77
  78     topleft = src+logo_y1*srcStride+logo_x1;
  79     topright = src+logo_y1*srcStride+logo_x2-1;
  80     botleft = src+(logo_y2-1)*srcStride+logo_x1;
  81
  82     if (!direct) memcpy_pic(dst, src, width, height, dstStride, srcStride);
  83
  84     dst += (logo_y1+1)*dstStride;
  85     src += (logo_y1+1)*srcStride;
  86
  87     for(y = logo_y1+1; y < logo_y2-1; y++)
  88     {
  89         for (x = logo_x1+1, xdst = dst+logo_x1+1, xsrc = src+logo_x1+1; x < logo_x2-1; x++, xdst++, xsrc++) {
  90             interp = ((topleft[srcStride*(y-logo_y-yclipt)]
  91                        + topleft[srcStride*(y-logo_y-1-yclipt)]
  92                        + topleft[srcStride*(y-logo_y+1-yclipt)])*(logo_w-(x-logo_x))/logo_w
  93                       + (topright[srcStride*(y-logo_y-yclipt)]
  94                          + topright[srcStride*(y-logo_y-1-yclipt)]
  95                          + topright[srcStride*(y-logo_y+1-yclipt)])*(x-logo_x)/logo_w
  96                       + (topleft[x-logo_x-xclipl]
  97                          + topleft[x-logo_x-1-xclipl]
  98                          + topleft[x-logo_x+1-xclipl])*(logo_h-(y-logo_y))/logo_h
  99                       + (botleft[x-logo_x-xclipl]
 100                          + botleft[x-logo_x-1-xclipl]
 101                          + botleft[x-logo_x+1-xclipl])*(y-logo_y)/logo_h
 102                 )/6;
 103 /*              interp = (topleft[srcStride*(y-logo_y)]*(logo_w-(x-logo_x))/logo_w
 104                           + topright[srcStride*(y-logo_y)]*(x-logo_x)/logo_w
 105                           + topleft[x-logo_x]*(logo_h-(y-logo_y))/logo_h
 106                           + botleft[x-logo_x]*(y-logo_y)/logo_h
 107                           )/2;*/
 108             if (y >= logo_y+band && y < logo_y+logo_h-band && x >= logo_x+band && x < logo_x+logo_w-band) {
 109                     *xdst = interp;
 110             } else {
 111                 dist = 0;
 112                 if (x < logo_x+band) dist = MAX(dist, logo_x-x+band);
 113                 else if (x >= logo_x+logo_w-band) dist = MAX(dist, x-(logo_x+logo_w-1-band));
 114                 if (y < logo_y+band) dist = MAX(dist, logo_y-y+band);
 115                 else if (y >= logo_y+logo_h-band) dist = MAX(dist, y-(logo_y+logo_h-1-band));
 116                 *xdst = (*xsrc*dist + interp*(band-dist))/band;
 117                 if (show && (dist == band-1)) *xdst = 0;
 118             }
 119         }
 120
 121         dst+= dstStride;
 122         src+= srcStride;
 123     }
 124 }
 125
 126 static int config(struct vf_instance_s* vf,
 127                   int width, int height, int d_width, int d_height,
 128                   unsigned int flags, unsigned int outfmt){
 129
 130     return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
 131 }
 132
 133
 134 static void get_image(struct vf_instance_s* vf, mp_image_t *mpi){
 135     if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
 136     if(mpi->imgfmt!=vf->priv->outfmt) return; // colorspace differ
 137     // ok, we can do pp in-place (or pp disabled):
 138     vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
 139                           mpi->type, mpi->flags, mpi->w, mpi->h);
 140     mpi->planes[0]=vf->dmpi->planes[0];
 141     mpi->stride[0]=vf->dmpi->stride[0];
 142     mpi->width=vf->dmpi->width;
 143     if(mpi->flags&MP_IMGFLAG_PLANAR){
 144         mpi->planes[1]=vf->dmpi->planes[1];
 145         mpi->planes[2]=vf->dmpi->planes[2];
 146         mpi->stride[1]=vf->dmpi->stride[1];
 147         mpi->stride[2]=vf->dmpi->stride[2];
 148     }
 149     mpi->flags|=MP_IMGFLAG_DIRECT;
 150 }
 151
 152 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
 153     mp_image_t *dmpi;
 154
 155     if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 156         // no DR, so get a new image! hope we'll get DR buffer:
 157         vf->dmpi=vf_get_image(vf->next,vf->priv->outfmt,
 158                               MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
 159                               mpi->w,mpi->h);
 160     }
 161     dmpi= vf->dmpi;
 162
 163     delogo(dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h,
 164            vf->priv->xoff, vf->priv->yoff, vf->priv->lw, vf->priv->lh, vf->priv->band, vf->priv->show,
 165            mpi->flags&MP_IMGFLAG_DIRECT);
 166     delogo(dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w/2, mpi->h/2,
 167            vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show,
 168            mpi->flags&MP_IMGFLAG_DIRECT);
 169     delogo(dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w/2, mpi->h/2,
 170            vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show,
 171            mpi->flags&MP_IMGFLAG_DIRECT);
 172
 173     vf_clone_mpi_attributes(dmpi, mpi);
 174
 175     return vf_next_put_image(vf,dmpi, pts);
 176 }
 177
 178 static void uninit(struct vf_instance_s* vf){
 179     if(!vf->priv) return;
 180
 181     free(vf->priv);
 182     vf->priv=NULL;
 183 }
 184
 185 //===========================================================================//
 186
 187 static int query_format(struct vf_instance_s* vf, unsigned int fmt){
 188     switch(fmt)
 189     {
 190     case IMGFMT_YV12:
 191     case IMGFMT_I420:
 192     case IMGFMT_IYUV:
 193         return vf_next_query_format(vf,vf->priv->outfmt);
 194     }
 195     return 0;
 196 }
 197
 198 static unsigned int fmt_list[]={
 199     IMGFMT_YV12,
 200     IMGFMT_I420,
 201     IMGFMT_IYUV,
 202     0
 203 };
 204
 205 static int open(vf_instance_t *vf, char* args){
 206     int res;
 207
 208     vf->config=config;
 209     vf->put_image=put_image;
 210     vf->get_image=get_image;
 211     vf->query_format=query_format;
 212     vf->uninit=uninit;
 213     if (!vf->priv)
 214     {
 215         vf->priv=malloc(sizeof(struct vf_priv_s));
 216         memset(vf->priv, 0, sizeof(struct vf_priv_s));
 217     }
 218
 219     if (args) res = sscanf(args, "%d:%d:%d:%d:%d",
 220                            &vf->priv->xoff, &vf->priv->yoff,
 221                            &vf->priv->lw, &vf->priv->lh,
 222                            &vf->priv->band);
 223     if (args && (res != 5)) {
 224         uninit(vf);
 225         return 0; // bad syntax
 226     }
 227
 228     mp_msg(MSGT_VFILTER, MSGL_V, "delogo: %d x %d, %d x %d, band = %d\n",
 229            vf->priv->xoff, vf->priv->yoff,
 230            vf->priv->lw, vf->priv->lh,
 231            vf->priv->band);
 232
 233     vf->priv->show = 0;
 234
 235     if (vf->priv->band < 0) {
 236         vf->priv->band = 4;
 237         vf->priv->show = 1;
 238     }
 239
 240
 241     vf->priv->lw += vf->priv->band*2;
 242     vf->priv->lh += vf->priv->band*2;
 243     vf->priv->xoff -= vf->priv->band;
 244     vf->priv->yoff -= vf->priv->band;
 245
 246     // check csp:
 247     vf->priv->outfmt=vf_match_csp(&vf->next,fmt_list,IMGFMT_YV12);
 248     if(!vf->priv->outfmt)
 249     {
 250         uninit(vf);
 251         return 0; // no csp match :(
 252     }
 253
 254     return 1;
 255 }
 256
 257 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
 258 static m_option_t vf_opts_fields[] = {
 259     { "x", ST_OFF(xoff), CONF_TYPE_INT, 0, 0, 0, NULL },
 260     { "y", ST_OFF(yoff), CONF_TYPE_INT, 0, 0, 0, NULL },
 261     { "w", ST_OFF(lw), CONF_TYPE_INT, 0, 0, 0, NULL },
 262     { "h", ST_OFF(lh), CONF_TYPE_INT, 0, 0, 0, NULL },
 263     { "t", ST_OFF(band), CONF_TYPE_INT, 0, 0, 0, NULL },
 264     { "band", ST_OFF(band), CONF_TYPE_INT, 0, 0, 0, NULL }, // alias
 265     { NULL, NULL, 0, 0, 0, 0, NULL }
 266 };
 267
 268 static m_struct_t vf_opts = {
 269     "delogo",
 270     sizeof(struct vf_priv_s),
 271     &vf_priv_dflt,
 272     vf_opts_fields
 273 };
 274
 275 const vf_info_t vf_info_delogo = {
 276     "simple logo remover",
 277     "delogo",
 278     "Jindrich Makovicka, Alex Beregszaszi",
 279     "",
 280     open,
 281     &vf_opts
 282 };
 283
 284 //===========================================================================//