libmpcodecs/vf_delogo.c

   1 /*
   2   Copyright (C) 2002 Jindrich Makovicka <makovick@kmlinux.fjfi.cvut.cz>
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8
   9   This program is distributed in the hope that it will be useful,
  10   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12   GNU General Public License for more details.
  13
  14   You should have received a copy of the GNU General Public License
  15   along with this program; if not, write to the Free Software
  16   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 */
  18
  19 /* A very simple tv station logo remover */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <inttypes.h>
  25 #include <math.h>
  26
  27 #include "../config.h"
  28 #include "../mp_msg.h"
  29 #include "../cpudetect.h"
  30
  31 #ifdef HAVE_MALLOC_H
  32 #include <malloc.h>
  33 #endif
  34
  35 #include "img_format.h"
  36 #include "mp_image.h"
  37 #include "vf.h"
  38 #include "../libvo/fastmemcpy.h"
  39
  40 #include "m_option.h"
  41 #include "m_struct.h"
  42
  43 //===========================================================================//
  44
  45 static struct vf_priv_s {
  46     unsigned int outfmt;
  47     int xoff, yoff, lw, lh, band, show;
  48 } vf_priv_dflt = {
  49     0,
  50     0, 0, 0, 0, 0, 0
  51 };
  52
  53 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
  54 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
  55
  56 static void delogo(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int width, int height,
  57                    int logo_x, int logo_y, int logo_w, int logo_h, int band, int show, int direct) {
  58     int y, x;
  59     int interp, dist;
  60     uint8_t *xdst, *xsrc;
  61
  62     uint8_t *topleft, *botleft, *topright;
  63     int xclipl, xclipr, yclipt, yclipb;
  64     int logo_x1, logo_x2, logo_y1, logo_y2;
  65
  66     xclipl = MAX(-logo_x, 0);
  67     xclipr = MAX(logo_x+logo_w-width, 0);
  68     yclipt = MAX(-logo_y, 0);
  69     yclipb = MAX(logo_y+logo_h-height, 0);
  70
  71     logo_x1 = logo_x + xclipl;
  72     logo_x2 = logo_x + logo_w - xclipr;
  73     logo_y1 = logo_y + yclipt;
  74     logo_y2 = logo_y + logo_h - yclipb;
  75
  76     topleft = src+logo_y1*srcStride+logo_x1;
  77     topright = src+logo_y1*srcStride+logo_x2-1;
  78     botleft = src+(logo_y2-1)*srcStride+logo_x1;
  79
  80     if (!direct) memcpy_pic(dst, src, width, height, dstStride, srcStride);
  81
  82     dst += (logo_y1+1)*dstStride;
  83     src += (logo_y1+1)*srcStride;
  84
  85     for(y = logo_y1+1; y < logo_y2-1; y++)
  86     {
  87         for (x = logo_x1+1, xdst = dst+logo_x1+1, xsrc = src+logo_x1+1; x < logo_x2-1; x++, xdst++, xsrc++) {
  88             interp = ((topleft[srcStride*(y-logo_y-yclipt)]
  89                        + topleft[srcStride*(y-logo_y-1-yclipt)]
  90                        + topleft[srcStride*(y-logo_y+1-yclipt)])*(logo_w-(x-logo_x))/logo_w
  91                       + (topright[srcStride*(y-logo_y-yclipt)]
  92                          + topright[srcStride*(y-logo_y-1-yclipt)]
  93                          + topright[srcStride*(y-logo_y+1-yclipt)])*(x-logo_x)/logo_w
  94                       + (topleft[x-logo_x-xclipl]
  95                          + topleft[x-logo_x-1-xclipl]
  96                          + topleft[x-logo_x+1-xclipl])*(logo_h-(y-logo_y))/logo_h
  97                       + (botleft[x-logo_x-xclipl]
  98                          + botleft[x-logo_x-1-xclipl]
  99                          + botleft[x-logo_x+1-xclipl])*(y-logo_y)/logo_h
 100                 )/6;
 101 /*              interp = (topleft[srcStride*(y-logo_y)]*(logo_w-(x-logo_x))/logo_w
 102                           + topright[srcStride*(y-logo_y)]*(x-logo_x)/logo_w
 103                           + topleft[x-logo_x]*(logo_h-(y-logo_y))/logo_h
 104                           + botleft[x-logo_x]*(y-logo_y)/logo_h
 105                           )/2;*/
 106             if (y >= logo_y+band && y < logo_y+logo_h-band && x >= logo_x+band && x < logo_x+logo_w-band) {
 107                     *xdst = interp;
 108             } else {
 109                 dist = 0;
 110                 if (x < logo_x+band) dist = MAX(dist, logo_x-x+band);
 111                 else if (x >= logo_x+logo_w-band) dist = MAX(dist, x-(logo_x+logo_w-1-band));
 112                 if (y < logo_y+band) dist = MAX(dist, logo_y-y+band);
 113                 else if (y >= logo_y+logo_h-band) dist = MAX(dist, y-(logo_y+logo_h-1-band));
 114                 *xdst = (*xsrc*dist + interp*(band-dist))/band;
 115                 if (show && (dist == band-1)) *xdst = 0;
 116             }
 117         }
 118
 119         dst+= dstStride;
 120         src+= srcStride;
 121     }
 122 }
 123
 124 static int config(struct vf_instance_s* vf,
 125                   int width, int height, int d_width, int d_height,
 126                   unsigned int flags, unsigned int outfmt){
 127
 128     return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
 129 }
 130
 131
 132 static void get_image(struct vf_instance_s* vf, mp_image_t *mpi){
 133     if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
 134     if(mpi->imgfmt!=vf->priv->outfmt) return; // colorspace differ
 135     // ok, we can do pp in-place (or pp disabled):
 136     vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
 137                           mpi->type, mpi->flags, mpi->w, mpi->h);
 138     mpi->planes[0]=vf->dmpi->planes[0];
 139     mpi->stride[0]=vf->dmpi->stride[0];
 140     mpi->width=vf->dmpi->width;
 141     if(mpi->flags&MP_IMGFLAG_PLANAR){
 142         mpi->planes[1]=vf->dmpi->planes[1];
 143         mpi->planes[2]=vf->dmpi->planes[2];
 144         mpi->stride[1]=vf->dmpi->stride[1];
 145         mpi->stride[2]=vf->dmpi->stride[2];
 146     }
 147     mpi->flags|=MP_IMGFLAG_DIRECT;
 148 }
 149
 150 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){
 151     mp_image_t *dmpi;
 152
 153     if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 154         // no DR, so get a new image! hope we'll get DR buffer:
 155         vf->dmpi=vf_get_image(vf->next,vf->priv->outfmt,
 156                               MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
 157                               mpi->w,mpi->h);
 158     }
 159     dmpi= vf->dmpi;
 160
 161     delogo(dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h,
 162            vf->priv->xoff, vf->priv->yoff, vf->priv->lw, vf->priv->lh, vf->priv->band, vf->priv->show,
 163            mpi->flags&MP_IMGFLAG_DIRECT);
 164     delogo(dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w/2, mpi->h/2,
 165            vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show,
 166            mpi->flags&MP_IMGFLAG_DIRECT);
 167     delogo(dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w/2, mpi->h/2,
 168            vf->priv->xoff/2, vf->priv->yoff/2, vf->priv->lw/2, vf->priv->lh/2, vf->priv->band/2, vf->priv->show,
 169            mpi->flags&MP_IMGFLAG_DIRECT);
 170
 171     vf_clone_mpi_attributes(dmpi, mpi);
 172
 173     return vf_next_put_image(vf,dmpi);
 174 }
 175
 176 static void uninit(struct vf_instance_s* vf){
 177     if(!vf->priv) return;
 178
 179     free(vf->priv);
 180     vf->priv=NULL;
 181 }
 182
 183 //===========================================================================//
 184
 185 static int query_format(struct vf_instance_s* vf, unsigned int fmt){
 186     switch(fmt)
 187     {
 188     case IMGFMT_YV12:
 189     case IMGFMT_I420:
 190     case IMGFMT_IYUV:
 191         return vf_next_query_format(vf,vf->priv->outfmt);
 192     }
 193     return 0;
 194 }
 195
 196 static unsigned int fmt_list[]={
 197     IMGFMT_YV12,
 198     IMGFMT_I420,
 199     IMGFMT_IYUV,
 200     0
 201 };
 202
 203 static int open(vf_instance_t *vf, char* args){
 204     int res;
 205
 206     vf->config=config;
 207     vf->put_image=put_image;
 208     vf->get_image=get_image;
 209     vf->query_format=query_format;
 210     vf->uninit=uninit;
 211     if (!vf->priv)
 212     {
 213         vf->priv=malloc(sizeof(struct vf_priv_s));
 214         memset(vf->priv, 0, sizeof(struct vf_priv_s));
 215     }
 216
 217     if (args) res = sscanf(args, "%d:%d:%d:%d:%d",
 218                            &vf->priv->xoff, &vf->priv->yoff,
 219                            &vf->priv->lw, &vf->priv->lh,
 220                            &vf->priv->band);
 221     if (args && (res != 5)) {
 222         uninit(vf);
 223         return 0; // bad syntax
 224     }
 225
 226     mp_msg(MSGT_VFILTER, MSGL_V, "delogo: %d x %d, %d x %d, band = %d\n",
 227            vf->priv->xoff, vf->priv->yoff,
 228            vf->priv->lw, vf->priv->lh,
 229            vf->priv->band);
 230
 231     vf->priv->show = 0;
 232
 233     if (vf->priv->band < 0) {
 234         vf->priv->band = 4;
 235         vf->priv->show = 1;
 236     }
 237
 238
 239     vf->priv->lw += vf->priv->band*2;
 240     vf->priv->lh += vf->priv->band*2;
 241     vf->priv->xoff -= vf->priv->band;
 242     vf->priv->yoff -= vf->priv->band;
 243
 244     // check csp:
 245     vf->priv->outfmt=vf_match_csp(&vf->next,fmt_list,IMGFMT_YV12);
 246     if(!vf->priv->outfmt)
 247     {
 248         uninit(vf);
 249         return 0; // no csp match :(
 250     }
 251
 252     return 1;
 253 }
 254
 255 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
 256 static m_option_t vf_opts_fields[] = {
 257     { "x", ST_OFF(xoff), CONF_TYPE_INT, 0, 0, 0, NULL },
 258     { "y", ST_OFF(yoff), CONF_TYPE_INT, 0, 0, 0, NULL },
 259     { "w", ST_OFF(lw), CONF_TYPE_INT, 0, 0, 0, NULL },
 260     { "h", ST_OFF(lh), CONF_TYPE_INT, 0, 0, 0, NULL },
 261     { "t", ST_OFF(band), CONF_TYPE_INT, 0, 0, 0, NULL },
 262     { "band", ST_OFF(band), CONF_TYPE_INT, 0, 0, 0, NULL }, // alias
 263     { NULL, NULL, 0, 0, 0, 0, NULL }
 264 };
 265
 266 static m_struct_t vf_opts = {
 267     "delogo",
 268     sizeof(struct vf_priv_s),
 269     &vf_priv_dflt,
 270     vf_opts_fields
 271 };
 272
 273 vf_info_t vf_info_delogo = {
 274     "simple logo remover",
 275     "delogo",
 276     "Jindrich Makovicka, Alex Beregszaszi",
 277     "",
 278     open,
 279     &vf_opts
 280 };
 281
 282 //===========================================================================//