git.sesse.net Git - vlc/blob - modules/video_filter/mosaic.c

   1 /*****************************************************************************
   2 * mosaic.c : Mosaic video plugin for vlc
   3 *****************************************************************************
   4 * Copyright (C) 2004-2005 VideoLAN
   5 * $Id$
   6 *
   7 * Authors: Antoine Cellerier <dionoea@via.ecp.fr>
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License as published by
  11 * the Free Software Foundation; either version 2 of the License, or
  12 * (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22 *****************************************************************************/
  23
  24 /*****************************************************************************
  25 * Preamble
  26 *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28 #include <string.h>
  29 #include <math.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/vout.h>
  33
  34 #include "vlc_filter.h"
  35 #include "vlc_input.h"
  36
  37 #include "vlc_image.h"
  38
  39 /*****************************************************************************
  40 * Local prototypes
  41 *****************************************************************************/
  42
  43 static int  CreateFilter    ( vlc_object_t * );
  44 static void DestroyFilter   ( vlc_object_t * );
  45
  46 static subpicture_t *Filter( filter_t *, mtime_t );
  47
  48 static int MosaicCallback( vlc_object_t *, char const *, vlc_value_t,
  49                             vlc_value_t, void * );
  50
  51 /*****************************************************************************
  52 * filter_sys_t : filter desriptor
  53 *****************************************************************************/
  54
  55 #include "../video_output/picture.h"
  56
  57 struct filter_sys_t
  58 {
  59
  60     image_handler_t *p_image;
  61     image_handler_t *p_image2;
  62     picture_t *p_pic;
  63
  64     int i_pos; /* mosaic positioning method */
  65     int i_ar; /* do we keep aspect ratio ? */
  66     int i_width, i_height; /* mosaic height and width */
  67     int i_cols, i_rows; /* mosaic rows and cols */
  68     int i_xoffset, i_yoffset; /* top left corner offset */
  69     int i_vborder, i_hborder; /* border width/height between miniatures */
  70     int i_alpha; /* subfilter alpha blending */
  71
  72     char **ppsz_order; /* list of picture-id */
  73     int i_order_length;
  74
  75 };
  76
  77 /*****************************************************************************
  78 * Module descriptor
  79 *****************************************************************************/
  80
  81 #define ALPHA_TEXT N_("Mosaic alpha blending (0 -> 255)")
  82 #define ALPHA_LONGTEXT N_("Mosaic alpha blending (0 -> 255). default is 255")
  83
  84 #define HEIGHT_TEXT N_("Mosaic height in pixels")
  85 #define WIDTH_TEXT N_("Mosaic width in pixels")
  86 #define XOFFSET_TEXT N_("Mosaic top left corner x coordinate")
  87 #define YOFFSET_TEXT N_("Mosaic top left corner y coordinate")
  88 #define VBORDER_TEXT N_("Mosaic vertical border width in pixels")
  89 #define HBORDER_TEXT N_("Mosaic horizontal border width in pixels")
  90
  91 #define POS_TEXT N_("Mosaic positioning method")
  92 #define POS_LONGTEXT N_("Mosaic positioning method. auto : automatically chose the best number of rows and columns. fixed : used the user defined number of rows and columns.")
  93 #define ROWS_TEXT N_("Mosaic number of rows")
  94 #define COLS_TEXT N_("Mosaic number of columns")
  95 #define AR_TEXT N_("Keep aspect ratio when resizing")
  96
  97 #define ORDER_TEXT N_("Order as a comma separated list of picture-id(s)")
  98
  99 static int pi_pos_values[] = { 0, 1 };
 100 static char * ppsz_pos_descriptions[] =
 101 { N_("auto"), N_("fixed") };
 102
 103
 104 vlc_module_begin();
 105     set_description( _("Mosaic video sub filter") );
 106     set_shortname( N_("Mosaic") );
 107     set_capability( "sub filter", 0 );
 108     set_callbacks( CreateFilter, DestroyFilter );
 109
 110     add_integer( "mosaic-alpha", 255, NULL, ALPHA_TEXT, ALPHA_LONGTEXT, VLC_FALSE );
 111     add_integer( "mosaic-height", 100, NULL, HEIGHT_TEXT, HEIGHT_TEXT, VLC_FALSE );
 112     add_integer( "mosaic-width", 100, NULL, WIDTH_TEXT, WIDTH_TEXT, VLC_FALSE );
 113     add_integer( "mosaic-xoffset", 0, NULL, XOFFSET_TEXT, XOFFSET_TEXT, VLC_TRUE );
 114     add_integer( "mosaic-yoffset", 0, NULL, YOFFSET_TEXT, YOFFSET_TEXT, VLC_TRUE );
 115     add_integer( "mosaic-vborder", 0, NULL, VBORDER_TEXT, VBORDER_TEXT, VLC_TRUE );
 116     add_integer( "mosaic-hborder", 0, NULL, HBORDER_TEXT, HBORDER_TEXT, VLC_TRUE );
 117
 118     add_integer( "mosaic-position", 0, NULL, POS_TEXT, POS_LONGTEXT, VLC_FALSE );
 119         change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
 120     add_integer( "mosaic-rows", 2, NULL, ROWS_TEXT, ROWS_TEXT, VLC_FALSE );
 121     add_integer( "mosaic-cols", 2, NULL, COLS_TEXT, COLS_TEXT, VLC_FALSE );
 122     add_bool( "mosaic-keep-aspect-ratio", 0, NULL, AR_TEXT, AR_TEXT, VLC_FALSE );
 123     add_string( "mosaic-order", "", NULL, ORDER_TEXT, ORDER_TEXT, VLC_FALSE );
 124 vlc_module_end();
 125
 126
 127 /*****************************************************************************
 128 * CreateFiler: allocates mosaic video filter
 129 *****************************************************************************/
 130
 131 static int CreateFilter( vlc_object_t *p_this )
 132 {
 133     filter_t *p_filter = (filter_t *)p_this;
 134     filter_sys_t *p_sys;
 135     char *psz_order;
 136     int i_index;
 137
 138     /* Allocate structure */
 139     p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
 140     if( p_sys == NULL )
 141     {
 142         msg_Err( p_filter, "out of memory" );
 143         return VLC_ENOMEM;
 144     }
 145     p_sys->p_image = image_HandlerCreate( p_filter );
 146     p_sys->p_image2 = image_HandlerCreate( p_filter );
 147
 148     p_filter->pf_sub_filter = Filter;
 149     p_sys->p_pic = NULL;
 150
 151     p_sys->i_width = __MAX( 0, var_CreateGetInteger( p_filter->p_libvlc, "mosaic-width" ) );
 152     p_sys->i_height = __MAX( 0, var_CreateGetInteger( p_filter->p_libvlc, "mosaic-height" ) );
 153
 154     p_sys->i_xoffset = __MAX( 0, var_CreateGetInteger( p_filter->p_libvlc, "mosaic-xoffset" ) );
 155     p_sys->i_yoffset = __MAX( 0, var_CreateGetInteger( p_filter->p_libvlc, "mosaic-yoffset" ) );
 156
 157     p_sys->i_vborder = __MAX( 0, var_CreateGetInteger( p_filter->p_libvlc, "mosaic-vborder" ) );
 158     p_sys->i_hborder = __MAX( 0, var_CreateGetInteger( p_filter->p_libvlc, "mosaic-hborder" ) );
 159
 160     p_sys->i_rows = __MAX( 1, var_CreateGetInteger( p_filter->p_libvlc, "mosaic-rows") );
 161     p_sys->i_cols = __MAX( 1, var_CreateGetInteger( p_filter->p_libvlc, "mosaic-cols") );
 162
 163     p_sys->i_alpha = var_CreateGetInteger( p_filter->p_libvlc, "mosaic-alpha" );
 164     p_sys->i_alpha = __MIN( 255, __MAX( 0, p_sys->i_alpha ) );
 165
 166     p_sys->i_pos = var_CreateGetInteger( p_filter->p_libvlc, "mosaic-position" );
 167     if( p_sys->i_pos > 1 || p_sys->i_pos < 0 ) p_sys->i_pos = 0;
 168
 169     p_sys->i_ar = var_CreateGetInteger( p_filter->p_libvlc, "mosaic-keep-aspect-ratio" );
 170
 171     p_sys->i_order_length = 0;
 172     p_sys->ppsz_order = NULL;
 173     psz_order = var_CreateGetString( p_filter->p_libvlc, "mosaic-order" );
 174
 175     if( psz_order[0] != 0 )
 176     {
 177         char* psz_end=NULL;
 178         i_index = 0;
 179         do
 180         {
 181             psz_end = strchr( psz_order, ',' );
 182             i_index++;
 183             p_sys->ppsz_order = realloc( p_sys->ppsz_order,
 184                                          i_index * sizeof(char *) );
 185             p_sys->ppsz_order[i_index - 1] = strndup( psz_order,
 186                                            psz_end - psz_order );
 187             psz_order = psz_end+1;
 188         } while( NULL !=  psz_end );
 189         p_sys->i_order_length = i_index;
 190     }
 191
 192     var_AddCallback( p_filter->p_libvlc, "mosaic-alpha",
 193                      MosaicCallback, p_sys );
 194     var_AddCallback( p_filter->p_libvlc, "mosaic-height",
 195                      MosaicCallback, p_sys );
 196     var_AddCallback( p_filter->p_libvlc, "mosaic-width",
 197                      MosaicCallback, p_sys );
 198     var_AddCallback( p_filter->p_libvlc, "mosaic-xoffset",
 199                      MosaicCallback, p_sys );
 200     var_AddCallback( p_filter->p_libvlc, "mosaic-yoffset",
 201                      MosaicCallback, p_sys );
 202     var_AddCallback( p_filter->p_libvlc, "mosaic-vborder",
 203                      MosaicCallback, p_sys );
 204     var_AddCallback( p_filter->p_libvlc, "mosaic-hborder",
 205                      MosaicCallback, p_sys );
 206     var_AddCallback( p_filter->p_libvlc, "mosaic-position",
 207                      MosaicCallback, p_sys );
 208     var_AddCallback( p_filter->p_libvlc, "mosaic-rows",
 209                      MosaicCallback, p_sys );
 210     var_AddCallback( p_filter->p_libvlc, "mosaic-cols",
 211                      MosaicCallback, p_sys );
 212     var_AddCallback( p_filter->p_libvlc, "mosaic-keep-aspect-ratio",
 213                      MosaicCallback, p_sys );
 214
 215     return VLC_SUCCESS;
 216 }
 217
 218 /*****************************************************************************
 219 * DestroyFilter: destroy mosaic video filter
 220 *****************************************************************************/
 221
 222 static void DestroyFilter( vlc_object_t *p_this )
 223 {
 224     filter_t *p_filter = (filter_t*)p_this;
 225     filter_sys_t *p_sys = p_filter->p_sys;
 226     int i_index;
 227
 228     image_HandlerDelete( p_sys->p_image );
 229     image_HandlerDelete( p_sys->p_image2 );
 230
 231     if( p_sys->i_order_length )
 232     {
 233         for( i_index = 0; i_index < p_sys->i_order_length; i_index++ )
 234         {
 235             free( p_sys->ppsz_order[i_index] );
 236         }
 237         free( p_sys->ppsz_order );
 238     }
 239
 240     var_Destroy( p_filter->p_libvlc, "mosaic-alpha" );
 241     var_Destroy( p_filter->p_libvlc, "mosaic-height" );
 242     var_Destroy( p_filter->p_libvlc, "mosaic-width" );
 243     var_Destroy( p_filter->p_libvlc, "mosaic-xoffset" );
 244     var_Destroy( p_filter->p_libvlc, "mosaic-yoffset" );
 245     var_Destroy( p_filter->p_libvlc, "mosaic-vborder" );
 246     var_Destroy( p_filter->p_libvlc, "mosaic-hborder" );
 247     var_Destroy( p_filter->p_libvlc, "mosaic-position" );
 248     var_Destroy( p_filter->p_libvlc, "mosaic-rows" );
 249     var_Destroy( p_filter->p_libvlc, "mosaic-cols" );
 250     var_Destroy( p_filter->p_libvlc, "mosaic-keep-aspect-ratio" );
 251     if( p_sys->p_pic ) p_sys->p_pic->pf_release( p_sys->p_pic );
 252     free( p_sys );
 253 }
 254
 255 /*****************************************************************************
 256 * Filter
 257 *****************************************************************************/
 258
 259 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
 260 {
 261
 262     filter_sys_t *p_sys = p_filter->p_sys;
 263     subpicture_t *p_spu;
 264
 265     libvlc_t *p_libvlc = p_filter->p_libvlc;
 266     vlc_value_t val;
 267     int i_index, i_real_index, i_row, i_col;
 268     int i_greatest_real_index_used = p_sys->i_order_length - 1;
 269
 270     subpicture_region_t *p_region;
 271     subpicture_region_t *p_region_prev = NULL;
 272
 273     struct picture_vout_t *p_picture_vout;
 274
 275     if( var_Get( p_libvlc, "p_picture_vout", &val ) )
 276     {
 277         return NULL;
 278     }
 279
 280     p_picture_vout = val.p_address;
 281
 282     /* Allocate the subpicture internal data. */
 283     p_spu = p_filter->pf_sub_buffer_new( p_filter );
 284     if( !p_spu )
 285     {
 286         return NULL;
 287     }
 288
 289     /* Initialize subpicture */
 290     p_spu->i_channel = 0;
 291     p_spu->i_start  = date;
 292     p_spu->i_stop = 0;
 293     p_spu->b_ephemer = VLC_TRUE;
 294     p_spu->i_alpha = p_sys->i_alpha;
 295
 296     vlc_mutex_lock( &p_picture_vout->lock );
 297
 298     if( p_sys->i_pos == 0 ) /* use automatic positioning */
 299     {
 300         int i_numpics = p_sys->i_order_length; /* keep slots and all */
 301         for( i_index = 0 ;
 302              i_index < p_picture_vout->i_picture_num ;
 303              i_index ++ )
 304         {
 305             if( p_picture_vout->p_pic[i_index].i_status
 306                            == PICTURE_VOUT_E_OCCUPIED ) {
 307                 i_numpics ++;
 308                 if( p_sys->i_order_length
 309                     && p_picture_vout->p_pic[i_index].psz_id != 0 ){
 310                 /* we also want to leave slots for images given in mosaic-order
 311                 that are not available in p_vout_picture */
 312                     int i;
 313                     for( i = 0; i < p_sys->i_order_length ; i++ )
 314                     {
 315                         if( ! strcmp( p_sys->ppsz_order[i],
 316                                     p_picture_vout->p_pic[i_index].psz_id ) )
 317                         {
 318                             i_numpics --;
 319                             break;
 320                         }
 321                     }
 322
 323                 }
 324             }
 325         }
 326         p_sys->i_rows = ((int)ceil(sqrt( (float)i_numpics )));
 327         p_sys->i_cols = ( i_numpics%p_sys->i_rows == 0 ?
 328                             i_numpics/p_sys->i_rows :
 329                             i_numpics/p_sys->i_rows + 1 );
 330     }
 331
 332     i_real_index = 0;
 333
 334     for( i_index = 0 ; i_index < p_picture_vout->i_picture_num ; i_index ++ )
 335     {
 336
 337         video_format_t fmt_in = {0}, fmt_middle = {0}, fmt_out = {0};
 338
 339         picture_t *p_converted, *p_middle;
 340
 341         if(  p_picture_vout->p_pic[i_index].p_picture == NULL )
 342         {
 343             break;
 344         }
 345
 346         if(  p_picture_vout->p_pic[i_index].i_status
 347                == PICTURE_VOUT_E_AVAILABLE )
 348         {
 349             msg_Dbg( p_filter, "Picture Vout Element is empty");
 350             break;
 351         }
 352         if( p_sys->i_order_length == 0 )
 353             i_real_index ++;
 354         else
 355         {
 356             int i;
 357             for( i =0; i <= p_sys->i_order_length; i++ )
 358             {
 359                 if( i == p_sys->i_order_length ) break;
 360                 if( strcmp( p_picture_vout->p_pic[i_index].psz_id,
 361                     p_sys->ppsz_order[ i ] ) == 0 )
 362                 {
 363                     i_real_index = i;
 364                     break;
 365                 }
 366             }
 367             if( i == p_sys->i_order_length )
 368                 i_real_index = ++i_greatest_real_index_used;
 369         }
 370         i_row = ( i_real_index / p_sys->i_cols ) % p_sys->i_rows ;
 371         i_col = i_real_index % p_sys->i_cols ;
 372
 373         /* Convert the images */
 374 /*        fprintf (stderr, "Input image %ix%i %4.4s\n",
 375                   p_picture_vout->p_pic[i_index].p_picture->format.i_width,
 376                   p_picture_vout->p_pic[i_index].p_picture->format.i_height,
 377                   (char *)&p_picture_vout->p_pic[i_index].p_picture->format.i_chroma );*/
 378
 379         fmt_in.i_chroma = p_picture_vout->p_pic[i_index].
 380                                                 p_picture->format.i_chroma;
 381         fmt_in.i_height = p_picture_vout->p_pic[i_index].
 382                                                 p_picture->format.i_height;
 383         fmt_in.i_width = p_picture_vout->p_pic[i_index].
 384                                                 p_picture->format.i_width;
 385
 386
 387         fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 388         fmt_out.i_width = fmt_in.i_width *
 389             ( ( p_sys->i_width - ( p_sys->i_cols - 1 ) * p_sys->i_vborder )
 390               / p_sys->i_cols ) / fmt_in.i_width;
 391         fmt_out.i_height = fmt_in.i_height *
 392             ( ( p_sys->i_height - ( p_sys->i_rows - 1 ) * p_sys->i_hborder )
 393               / p_sys->i_rows ) / fmt_in.i_height;
 394         if( p_sys->i_ar ) /* keep aspect ratio */
 395         {
 396             if( (float)fmt_out.i_width/(float)fmt_out.i_height
 397                 > (float)fmt_in.i_width/(float)fmt_in.i_height )
 398             {
 399                 fmt_out.i_width = ( fmt_out.i_height * fmt_in.i_width ) / fmt_in.i_height ;
 400             } else {
 401                 fmt_out.i_height = ( fmt_out.i_width * fmt_in.i_height ) / fmt_in.i_width ;
 402             }
 403          }
 404
 405         fmt_out.i_visible_width = fmt_out.i_width;
 406         fmt_out.i_visible_height = fmt_out.i_height;
 407
 408         fmt_middle.i_chroma = fmt_in.i_chroma;
 409         fmt_middle.i_visible_width = fmt_middle.i_width = fmt_out.i_width;
 410         fmt_middle.i_visible_height = fmt_middle.i_height = fmt_out.i_height;
 411
 412         p_middle = image_Convert( p_sys->p_image,
 413             p_picture_vout->p_pic[i_index].p_picture, &fmt_in, &fmt_middle );
 414         if( !p_middle )
 415         {
 416             msg_Err( p_filter, "image resizing failed" );
 417             p_filter->pf_sub_buffer_del( p_filter, p_spu );
 418             vlc_mutex_unlock( &p_picture_vout->lock );
 419             return NULL;
 420         }
 421
 422         p_converted = image_Convert( p_sys->p_image2,
 423                  p_middle, &fmt_middle, &fmt_out );
 424         if( !p_converted )
 425         {
 426             msg_Err( p_filter, "image chroma convertion failed" );
 427             p_filter->pf_sub_buffer_del( p_filter, p_spu );
 428             vlc_mutex_unlock( &p_picture_vout->lock );
 429             return NULL;
 430         }
 431
 432 /*        fprintf( stderr, "Converted %ix%i %4.4s\n", p_converted->format.i_width, p_converted->format.i_height, (char *)&p_converted->format.i_chroma);*/
 433
 434
 435         p_region = p_spu->pf_create_region( VLC_OBJECT(p_filter), &fmt_out);
 436         if( !p_region )
 437         {
 438             msg_Err( p_filter, "cannot allocate SPU region" );
 439             p_filter->pf_sub_buffer_del( p_filter, p_spu );
 440             vlc_mutex_unlock( &p_picture_vout->lock );
 441             return NULL;
 442         }
 443
 444         if( p_sys->i_ar ) /* keep aspect ratio */
 445         {
 446             /* center the video in the dedicated rectangle */
 447             p_region->i_x = p_sys->i_xoffset
 448                             + i_col * ( p_sys->i_width / p_sys->i_cols )
 449                             + ( i_col * p_sys->i_vborder ) / p_sys->i_cols
 450                         + ( fmt_in.i_width *
 451             ( ( p_sys->i_width - ( p_sys->i_cols - 1 ) * p_sys->i_vborder )
 452               / p_sys->i_cols ) / fmt_in.i_width - fmt_out.i_width ) / 2;
 453             p_region->i_y = p_sys->i_yoffset
 454                         + i_row * ( p_sys->i_height / p_sys->i_rows )
 455                         + ( i_row * p_sys->i_hborder ) / p_sys->i_rows
 456                         + ( fmt_in.i_height *
 457             ( ( p_sys->i_height - ( p_sys->i_rows - 1 ) * p_sys->i_hborder )
 458               / p_sys->i_rows ) / fmt_in.i_height - fmt_out.i_height ) / 2;
 459         } else {
 460             /* we don't have to center the video since it takes the
 461             whole rectangle area */
 462             p_region->i_x = p_sys->i_xoffset
 463                             + i_col * ( p_sys->i_width / p_sys->i_cols )
 464                             + ( i_col * p_sys->i_vborder ) / p_sys->i_cols;
 465             p_region->i_y = p_sys->i_yoffset
 466                         + i_row * ( p_sys->i_height / p_sys->i_rows )
 467                         + ( i_row * p_sys->i_hborder ) / p_sys->i_rows;
 468         }
 469
 470         if( p_region_prev == NULL ){
 471             p_spu->p_region = p_region;
 472         } else {
 473             p_region_prev->p_next = p_region;
 474         }
 475
 476         p_region_prev = p_region;
 477
 478         vout_CopyPicture( p_filter, &p_region->picture, p_converted );
 479
 480         p_middle->pf_release( p_middle );
 481         p_converted->pf_release( p_converted );
 482     }
 483
 484     vlc_mutex_unlock( &p_picture_vout->lock );
 485
 486     return p_spu;
 487 }
 488
 489 /*****************************************************************************
 490 * Callback to update params on the fly
 491 *****************************************************************************/
 492
 493 static int MosaicCallback( vlc_object_t *p_this, char const *psz_var,
 494                             vlc_value_t oldval, vlc_value_t newval,
 495                             void *p_data )
 496 {
 497     filter_sys_t *p_sys = (filter_sys_t *) p_data;
 498     if( !strcmp( psz_var, "mosaic-alpha" ) )
 499     {
 500         msg_Dbg( p_this, "Changing alpha from %d/255 to %d/255",
 501                          p_sys->i_alpha, newval.i_int);
 502         p_sys->i_alpha = __MIN( __MAX( newval.i_int, 0 ), 255 );
 503     }
 504     else if( !strcmp( psz_var, "mosaic-height" ) )
 505     {
 506         msg_Dbg( p_this, "Changing height from %dpx to %dpx",
 507                           p_sys->i_height, newval.i_int );
 508         p_sys->i_height = __MAX( newval.i_int, 0 );
 509     }
 510     else if( !strcmp( psz_var, "mosaic-width" ) )
 511     {
 512         msg_Dbg( p_this, "Changing width from %dpx to %dpx",
 513                          p_sys->i_width, newval.i_int );
 514         p_sys->i_width = __MAX( newval.i_int, 0 );
 515     }
 516     else if( !strcmp( psz_var, "mosaic-xoffset" ) )
 517     {
 518         msg_Dbg( p_this, "Changing x offset from %dpx to %dpx",
 519                          p_sys->i_xoffset, newval.i_int );
 520         p_sys->i_xoffset = __MAX( newval.i_int, 0 );
 521     }
 522     else if( !strcmp( psz_var, "mosaic-yoffset" ) )
 523     {
 524         msg_Dbg( p_this, "Changing y offset from %dpx to %dpx",
 525                          p_sys->i_yoffset, newval.i_int );
 526         p_sys->i_yoffset = __MAX( newval.i_int, 0 );
 527     }
 528     else if( !strcmp( psz_var, "mosaic-vborder" ) )
 529     {
 530         msg_Dbg( p_this, "Changing vertical border from %dpx to %dpx",
 531                          p_sys->i_vborder, newval.i_int );
 532         p_sys->i_vborder = __MAX( newval.i_int, 0 );
 533     }
 534     else if( !strcmp( psz_var, "mosaic-hborder" ) )
 535     {
 536         msg_Dbg( p_this, "Changing horizontal border from %dpx to %dpx",
 537                          p_sys->i_vborder, newval.i_int );
 538         p_sys->i_hborder = __MAX( newval.i_int, 0 );
 539     }
 540     else if( !strcmp( psz_var, "mosaic-position" ) )
 541     {
 542         if( newval.i_int > 1 || newval.i_int < 0 )
 543         {
 544             msg_Err( p_this, "Position is either 0 (auto) or 1 (fixed)" );
 545         }
 546         else
 547         {
 548             msg_Dbg( p_this, "Changing position method from %d (%s) to %d (%s)",
 549                              p_sys->i_pos, ppsz_pos_descriptions[p_sys->i_pos],
 550                              newval.i_int, ppsz_pos_descriptions[newval.i_int]);
 551             p_sys->i_pos = newval.i_int;
 552         }
 553     }
 554     else if( !strcmp( psz_var, "mosaic-rows" ) )
 555     {
 556         msg_Dbg( p_this, "Changing number of rows from %d to %d",
 557                          p_sys->i_rows, newval.i_int );
 558         p_sys->i_rows = __MAX( newval.i_int, 1 );
 559     }
 560     else if( !strcmp( psz_var, "mosaic-cols" ) )
 561     {
 562         msg_Dbg( p_this, "Changing number of columns from %d to %d",
 563                          p_sys->i_cols, newval.i_int );
 564         p_sys->i_cols = __MAX( newval.i_int, 1 );
 565     }
 566     else if( !strcmp( psz_var, "mosaic-keep-aspect-ratio" ) )
 567     {
 568         if( newval.i_int )
 569         {
 570             msg_Dbg( p_this, "Keep aspect ratio" );
 571             p_sys->i_ar = 1;
 572         }
 573         else
 574         {
 575             msg_Dbg( p_this, "Don't keep aspect ratio" );
 576             p_sys->i_ar = 0;
 577         }
 578     }
 579     return VLC_SUCCESS;
 580 }