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 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea@via.ecp.fr>
   8  *          Christophe Massiot <massiot@via.ecp.fr>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23 *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdlib.h>                                      /* malloc(), free() */
  29 #include <string.h>
  30 #include <math.h>
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc/vout.h>
  34
  35 #ifdef HAVE_LIMITS_H
  36 #   include <limits.h> /* INT_MAX */
  37 #endif
  38
  39 #include "vlc_filter.h"
  40 #include "vlc_image.h"
  41
  42 #include "mosaic.h"
  43
  44 #define BLANK_DELAY I64C(1000000)
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int  CreateFilter    ( vlc_object_t * );
  50 static void DestroyFilter   ( vlc_object_t * );
  51
  52 static subpicture_t *Filter( filter_t *, mtime_t );
  53
  54 static int MosaicCallback( vlc_object_t *, char const *, vlc_value_t,
  55                            vlc_value_t, void * );
  56
  57 /*****************************************************************************
  58  * filter_sys_t : filter descriptor
  59  *****************************************************************************/
  60 struct filter_sys_t
  61 {
  62     vlc_mutex_t lock;
  63     vlc_mutex_t *p_lock;
  64
  65     image_handler_t *p_image;
  66     picture_t *p_pic;
  67
  68     int i_position; /* mosaic positioning method */
  69     vlc_bool_t b_ar; /* do we keep the aspect ratio ? */
  70     vlc_bool_t b_keep; /* do we keep the original picture format ? */
  71     int i_width, i_height; /* mosaic height and width */
  72     int i_cols, i_rows; /* mosaic rows and cols */
  73     int i_align; /* mosaic alignment in background video */
  74     int i_xoffset, i_yoffset; /* top left corner offset */
  75     int i_vborder, i_hborder; /* border width/height between miniatures */
  76     int i_alpha; /* subfilter alpha blending */
  77
  78     vlc_bool_t b_bs; /* Bluescreen vars */
  79     int i_bsu, i_bsv, i_bsut, i_bsvt;
  80
  81     char **ppsz_order; /* list of picture-id */
  82     int i_order_length;
  83
  84     mtime_t i_delay;
  85 };
  86
  87 /*****************************************************************************
  88  * Module descriptor
  89  *****************************************************************************/
  90 #define ALPHA_TEXT N_("Transparency")
  91 #define ALPHA_LONGTEXT N_("Transparency of the mosaic foreground pictures. " \
  92         "0 means transparent, 255 opaque (default)." )
  93
  94 #define HEIGHT_TEXT N_("Height")
  95 #define HEIGHT_LONGTEXT N_( "Total height of the mosaic, in pixels." )
  96 #define WIDTH_TEXT N_("Width")
  97 #define WIDTH_LONGTEXT N_( "Total width of the mosaic, in pixels." )
  98
  99 #define XOFFSET_TEXT N_("Top left corner X coordinate")
 100 #define XOFFSET_LONGTEXT N_("X Coordinate of the top-left corner of the mosaic.")
 101 #define YOFFSET_TEXT N_("Top left corner Y coordinate")
 102 #define YOFFSET_LONGTEXT N_("Y Coordinate of the top-left corner of the mosaic.")
 103 #define VBORDER_TEXT N_("Vertical border width")
 104 #define VBORDER_LONGTEXT N_( "Width in pixels of the border than can be "\
 105     "drawn vertically around the mosaic." )
 106 #define HBORDER_TEXT N_("Horizontal border width")
 107 #define HBORDER_LONGTEXT N_( "Width in pixels of the border than can "\
 108     "be drawn horizontally around the mosaic." )
 109
 110 #define ALIGN_TEXT N_("Mosaic alignment" )
 111 #define ALIGN_LONGTEXT N_( \
 112   "You can enforce the mosaic alignment on the video " \
 113   "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
 114   "also use combinations of these values, eg 6 = top-right).")
 115
 116 #define POS_TEXT N_("Positioning method")
 117 #define POS_LONGTEXT N_("Positioning method for the mosaic. auto: " \
 118         "automatically choose the best number of rows and columns. " \
 119         "fixed: use the user-defined number of rows and columns.")
 120
 121 #define ROWS_TEXT N_("Number of rows")
 122 #define ROWS_LONGTEXT N_("Number of image rows in the mosaic (only used if "\
 123         "positionning method is set to \"fixed\"." )
 124 #define COLS_TEXT N_("Number of columns")
 125 #define COLS_LONGTEXT N_("Number of image columns in the mosaic (only used if "\
 126         "positionning method is set to \"fixed\"." )
 127
 128 #define AR_TEXT N_("Keep aspect ratio")
 129 #define AR_LONGTEXT N_("Keep the original aspect ratio when resizing " \
 130         "mosaic elements." )
 131 #define KEEP_TEXT N_("Keep original size")
 132 #define KEEP_LONGTEXT N_("Keep the original size of mosaic elements." )
 133
 134 #define ORDER_TEXT N_("Elements order" )
 135 #define ORDER_LONGTEXT N_( "You can enforce the order of the elements on " \
 136         "the mosaic. You must give a comma-separated list of picture ID(s)." \
 137         "These IDs are assigned in the \"mosaic-bridge\" module." )
 138
 139 #define DELAY_TEXT N_("Delay")
 140 #define DELAY_LONGTEXT N_("Pictures coming from the mosaic elements " \
 141         "will be delayed according to this value (in milliseconds). For high " \
 142         "values you will need to raise caching at input.")
 143
 144 #define BLUESCREEN_TEXT N_("Bluescreen" )
 145 #define BLUESCREEN_LONGTEXT N_( "This effect, also known as \"greenscreen\" "\
 146    "or \"chroma key\" blends the \"blue parts\" of the foreground images of " \
 147    "the mosaic on the background (like wheather forecast presenters). You " \
 148    "can choose the \"key\" color for blending (blue by default)." )
 149
 150 #define BLUESCREENU_TEXT N_("Bluescreen U value")
 151 #define BLUESCREENU_LONGTEXT N_("\"U\" value for the bluescreen key color " \
 152         "(in YUV values). From 0 to 255. Defaults to 120 for blue." )
 153 #define BLUESCREENV_TEXT N_("Bluescreen V value")
 154 #define BLUESCREENV_LONGTEXT N_("\"V\" value for the bluescreen key color " \
 155         "(in YUV values). From 0 to 255. Defaults to 90 for blue." )
 156 #define BLUESCREENUTOL_TEXT N_("Bluescreen U tolerance")
 157 #define BLUESCREENUTOL_LONGTEXT N_("Tolerance of the bluescreen blender " \
 158         "on color variations for the U plane. A value between 10 and 20 " \
 159         "seems sensible." )
 160 #define BLUESCREENVTOL_TEXT N_("Bluescreen V tolerance")
 161 #define BLUESCREENVTOL_LONGTEXT N_("Tolerance of the bluescreen blender " \
 162         "on color variations for the V plane. A value between 10 and 20 " \
 163         "seems sensible." )
 164
 165 static int pi_pos_values[] = { 0, 1 };
 166 static char * ppsz_pos_descriptions[] =
 167 { N_("auto"), N_("fixed") };
 168
 169 static int pi_align_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
 170 static char *ppsz_align_descriptions[] =
 171      { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
 172      N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
 173
 174
 175 vlc_module_begin();
 176     set_description( N_("Mosaic video sub filter") );
 177     set_shortname( N_("Mosaic") );
 178     set_category( CAT_VIDEO );
 179     set_subcategory( SUBCAT_VIDEO_SUBPIC);
 180     set_capability( "sub filter", 0 );
 181     set_callbacks( CreateFilter, DestroyFilter );
 182
 183     add_integer( "mosaic-alpha", 255, NULL, ALPHA_TEXT, ALPHA_LONGTEXT, VLC_FALSE );
 184     add_integer( "mosaic-height", 100, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT, VLC_FALSE );
 185     add_integer( "mosaic-width", 100, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, VLC_FALSE );
 186     add_integer( "mosaic-align", 5, NULL, ALIGN_TEXT, ALIGN_LONGTEXT, VLC_TRUE);
 187         change_integer_list( pi_align_values, ppsz_align_descriptions, 0 );
 188     add_integer( "mosaic-xoffset", 0, NULL, XOFFSET_TEXT, XOFFSET_LONGTEXT, VLC_TRUE );
 189     add_integer( "mosaic-yoffset", 0, NULL, YOFFSET_TEXT, YOFFSET_LONGTEXT, VLC_TRUE );
 190     add_integer( "mosaic-vborder", 0, NULL, VBORDER_TEXT, VBORDER_LONGTEXT, VLC_TRUE );
 191     add_integer( "mosaic-hborder", 0, NULL, HBORDER_TEXT, HBORDER_LONGTEXT, VLC_TRUE );
 192
 193     add_integer( "mosaic-position", 0, NULL, POS_TEXT, POS_LONGTEXT, VLC_FALSE );
 194         change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
 195     add_integer( "mosaic-rows", 2, NULL, ROWS_TEXT, ROWS_LONGTEXT, VLC_FALSE );
 196     add_integer( "mosaic-cols", 2, NULL, COLS_TEXT, COLS_LONGTEXT, VLC_FALSE );
 197     add_bool( "mosaic-keep-aspect-ratio", 0, NULL, AR_TEXT, AR_LONGTEXT, VLC_FALSE );
 198     add_bool( "mosaic-keep-picture", 0, NULL, KEEP_TEXT, KEEP_LONGTEXT, VLC_FALSE );
 199     add_string( "mosaic-order", "", NULL, ORDER_TEXT, ORDER_LONGTEXT, VLC_FALSE );
 200
 201     add_integer( "mosaic-delay", 0, NULL, DELAY_TEXT, DELAY_LONGTEXT,
 202                  VLC_FALSE );
 203
 204     add_bool( "mosaic-bs", 0, NULL, BLUESCREEN_TEXT,
 205               BLUESCREEN_LONGTEXT, VLC_FALSE );
 206     add_integer( "mosaic-bsu", 120, NULL, BLUESCREENU_TEXT,
 207                  BLUESCREENU_LONGTEXT, VLC_FALSE );
 208     add_integer( "mosaic-bsv", 90, NULL, BLUESCREENV_TEXT,
 209                  BLUESCREENV_LONGTEXT, VLC_FALSE );
 210     add_integer( "mosaic-bsut", 17, NULL, BLUESCREENUTOL_TEXT,
 211                  BLUESCREENUTOL_LONGTEXT, VLC_FALSE );
 212     add_integer( "mosaic-bsvt", 17, NULL, BLUESCREENVTOL_TEXT,
 213                  BLUESCREENVTOL_LONGTEXT, VLC_FALSE );
 214
 215     var_Create( p_module->p_libvlc, "mosaic-lock", VLC_VAR_MUTEX );
 216 vlc_module_end();
 217
 218
 219 /*****************************************************************************
 220  * CreateFiler: allocate mosaic video filter
 221  *****************************************************************************/
 222 static int CreateFilter( vlc_object_t *p_this )
 223 {
 224     filter_t *p_filter = (filter_t *)p_this;
 225     filter_sys_t *p_sys;
 226     libvlc_t *p_libvlc = p_filter->p_libvlc;
 227     char *psz_order;
 228     int i_index;
 229     vlc_value_t val;
 230
 231     /* The mosaic thread is more important than the decoder threads */
 232     vlc_thread_set_priority( p_this, VLC_THREAD_PRIORITY_OUTPUT );
 233
 234     /* Allocate structure */
 235     p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
 236     if( p_sys == NULL )
 237     {
 238         msg_Err( p_filter, "out of memory" );
 239         return VLC_ENOMEM;
 240     }
 241
 242     p_filter->pf_sub_filter = Filter;
 243     p_sys->p_pic = NULL;
 244
 245     vlc_mutex_init( p_filter, &p_sys->lock );
 246     vlc_mutex_lock( &p_sys->lock );
 247
 248     var_Get( p_libvlc, "mosaic-lock", &val );
 249     p_sys->p_lock = val.p_address;
 250
 251 #define GET_VAR( name, min, max )                                           \
 252     p_sys->i_##name = __MIN( max, __MAX( min,                               \
 253                 var_CreateGetInteger( p_filter, "mosaic-" #name ) ) );      \
 254     var_Destroy( p_filter, "mosaic-" #name );                               \
 255     var_Create( p_libvlc, "mosaic-" #name, VLC_VAR_INTEGER );               \
 256     var_SetInteger( p_libvlc, "mosaic-" #name, p_sys->i_##name );           \
 257     var_AddCallback( p_libvlc, "mosaic-" #name, MosaicCallback, p_sys );
 258
 259     GET_VAR( width, 0, INT_MAX );
 260     GET_VAR( height, 0, INT_MAX );
 261     GET_VAR( xoffset, 0, INT_MAX );
 262     GET_VAR( yoffset, 0, INT_MAX );
 263
 264     p_sys->i_align = __MIN( 10, __MAX( 0,  var_CreateGetInteger( p_filter, "mosaic-align" ) ) );
 265     if( p_sys->i_align == 3 || p_sys->i_align == 7 )
 266         p_sys->i_align = 5;
 267     var_Destroy( p_filter, "mosaic-align" );
 268     var_Create( p_libvlc, "mosaic-align", VLC_VAR_INTEGER );
 269     var_SetInteger( p_libvlc, "mosaic-align", p_sys->i_align );
 270     var_AddCallback( p_libvlc, "mosaic-align", MosaicCallback, p_sys );
 271
 272     GET_VAR( vborder, 0, INT_MAX );
 273     GET_VAR( hborder, 0, INT_MAX );
 274     GET_VAR( rows, 1, INT_MAX );
 275     GET_VAR( cols, 1, INT_MAX );
 276     GET_VAR( alpha, 0, 255 );
 277     GET_VAR( position, 0, 1 );
 278     GET_VAR( delay, 100, INT_MAX );
 279     p_sys->i_delay *= 1000;
 280
 281     p_sys->b_ar = var_CreateGetBool( p_filter, "mosaic-keep-aspect-ratio" );
 282     var_Destroy( p_filter, "mosaic-keep-aspect-ratio" );
 283     var_Create( p_libvlc, "mosaic-keep-aspect-ratio", VLC_VAR_INTEGER );
 284     var_SetBool( p_libvlc, "mosaic-keep-aspect-ratio", p_sys->b_ar );
 285     var_AddCallback( p_libvlc, "mosaic-keep-aspect-ratio", MosaicCallback,
 286                      p_sys );
 287
 288     p_sys->b_keep = var_CreateGetBool( p_filter, "mosaic-keep-picture" );
 289     if ( !p_sys->b_keep )
 290     {
 291         p_sys->p_image = image_HandlerCreate( p_filter );
 292     }
 293
 294     p_sys->i_order_length = 0;
 295     p_sys->ppsz_order = NULL;
 296     psz_order = var_CreateGetString( p_filter, "mosaic-order" );
 297
 298     if( psz_order[0] != 0 )
 299     {
 300         char *psz_end = NULL;
 301         i_index = 0;
 302         do
 303         {
 304             psz_end = strchr( psz_order, ',' );
 305             i_index++;
 306             p_sys->ppsz_order = realloc( p_sys->ppsz_order,
 307                                          i_index * sizeof(char *) );
 308             p_sys->ppsz_order[i_index - 1] = strndup( psz_order,
 309                                            psz_end - psz_order );
 310             psz_order = psz_end+1;
 311         } while( NULL !=  psz_end );
 312         p_sys->i_order_length = i_index;
 313     }
 314
 315     /* Bluescreen specific stuff */
 316     GET_VAR( bsu, 0x00, 0xff );
 317     GET_VAR( bsv, 0x00, 0xff );
 318     GET_VAR( bsut, 0x00, 0xff );
 319     GET_VAR( bsvt, 0x00, 0xff );
 320     p_sys->b_bs = var_CreateGetBool( p_filter, "mosaic-bs" );
 321     var_Destroy( p_filter, "mosaic-bs" );
 322     var_Create( p_libvlc, "mosaic-bs", VLC_VAR_INTEGER );
 323     var_SetBool( p_libvlc, "mosaic-bs", p_sys->b_bs );
 324     var_AddCallback( p_libvlc, "mosaic-bs", MosaicCallback, p_sys );
 325     if( p_sys->b_bs && p_sys->b_keep )
 326     {
 327         msg_Warn( p_filter, "mosaic-keep-picture needs to be disabled for"
 328                             " bluescreen to work" );
 329     }
 330
 331     vlc_mutex_unlock( &p_sys->lock );
 332
 333     return VLC_SUCCESS;
 334 }
 335
 336 /*****************************************************************************
 337  * DestroyFilter: destroy mosaic video filter
 338  *****************************************************************************/
 339 static void DestroyFilter( vlc_object_t *p_this )
 340 {
 341     filter_t *p_filter = (filter_t*)p_this;
 342     filter_sys_t *p_sys = p_filter->p_sys;
 343     libvlc_t *p_libvlc = p_filter->p_libvlc;
 344     int i_index;
 345
 346     vlc_mutex_lock( &p_sys->lock );
 347
 348     if( !p_sys->b_keep )
 349     {
 350         image_HandlerDelete( p_sys->p_image );
 351     }
 352
 353     if( p_sys->i_order_length )
 354     {
 355         for( i_index = 0; i_index < p_sys->i_order_length; i_index++ )
 356         {
 357             free( p_sys->ppsz_order[i_index] );
 358         }
 359         free( p_sys->ppsz_order );
 360     }
 361
 362     var_Destroy( p_libvlc, "mosaic-alpha" );
 363     var_Destroy( p_libvlc, "mosaic-height" );
 364     var_Destroy( p_libvlc, "mosaic-align" );
 365     var_Destroy( p_libvlc, "mosaic-width" );
 366     var_Destroy( p_libvlc, "mosaic-xoffset" );
 367     var_Destroy( p_libvlc, "mosaic-yoffset" );
 368     var_Destroy( p_libvlc, "mosaic-vborder" );
 369     var_Destroy( p_libvlc, "mosaic-hborder" );
 370     var_Destroy( p_libvlc, "mosaic-position" );
 371     var_Destroy( p_libvlc, "mosaic-rows" );
 372     var_Destroy( p_libvlc, "mosaic-cols" );
 373     var_Destroy( p_libvlc, "mosaic-keep-aspect-ratio" );
 374
 375     var_Destroy( p_libvlc, "mosaic-bsu" );
 376     var_Destroy( p_libvlc, "mosaic-bsv" );
 377     var_Destroy( p_libvlc, "mosaic-bsut" );
 378     var_Destroy( p_libvlc, "mosaic-bsvt" );
 379     var_Destroy( p_libvlc, "mosaic-bs" );
 380
 381     if( p_sys->p_pic ) p_sys->p_pic->pf_release( p_sys->p_pic );
 382     vlc_mutex_unlock( &p_sys->lock );
 383     vlc_mutex_destroy( &p_sys->lock );
 384     free( p_sys );
 385 }
 386
 387 /*****************************************************************************
 388  * MosaicReleasePicture : Hack to avoid picture duplication
 389  *****************************************************************************/
 390 static void MosaicReleasePicture( picture_t *p_picture )
 391 {
 392     picture_t *p_original_pic = (picture_t *)p_picture->p_sys;
 393
 394     p_original_pic->pf_release( p_original_pic );
 395 }
 396
 397 /*****************************************************************************
 398  * Filter
 399  *****************************************************************************/
 400 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
 401 {
 402     filter_sys_t *p_sys = p_filter->p_sys;
 403     bridge_t *p_bridge;
 404
 405     subpicture_t *p_spu;
 406
 407     int i_index, i_real_index, i_row, i_col;
 408     int i_greatest_real_index_used = p_sys->i_order_length - 1;
 409
 410     unsigned int col_inner_width, row_inner_height;
 411
 412     subpicture_region_t *p_region;
 413     subpicture_region_t *p_region_prev = NULL;
 414
 415     /* Allocate the subpicture internal data. */
 416     p_spu = p_filter->pf_sub_buffer_new( p_filter );
 417     if( !p_spu )
 418     {
 419         return NULL;
 420     }
 421
 422     /* Initialize subpicture */
 423     p_spu->i_channel = 0;
 424     p_spu->i_start  = date;
 425     p_spu->i_stop = 0;
 426     p_spu->b_ephemer = VLC_TRUE;
 427     p_spu->i_alpha = p_sys->i_alpha;
 428     p_spu->i_flags = p_sys->i_align;
 429     p_spu->b_absolute = VLC_FALSE;
 430
 431     vlc_mutex_lock( &p_sys->lock );
 432     vlc_mutex_lock( p_sys->p_lock );
 433
 434     p_bridge = GetBridge( p_filter );
 435     if ( p_bridge == NULL )
 436     {
 437         vlc_mutex_unlock( p_sys->p_lock );
 438         vlc_mutex_unlock( &p_sys->lock );
 439         return p_spu;
 440     }
 441
 442     if ( p_sys->i_position == 0 ) /* use automatic positioning */
 443     {
 444         int i_numpics = p_sys->i_order_length; /* keep slots and all */
 445         for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
 446         {
 447             bridged_es_t *p_es = p_bridge->pp_es[i_index];
 448             if ( !p_es->b_empty )
 449             {
 450                 i_numpics ++;
 451                 if( p_sys->i_order_length && p_es->psz_id != 0 )
 452                 {
 453                     /* We also want to leave slots for images given in
 454                      * mosaic-order that are not available in p_vout_picture */
 455                     int i;
 456                     for( i = 0; i < p_sys->i_order_length ; i++ )
 457                     {
 458                         if( !strcmp( p_sys->ppsz_order[i], p_es->psz_id ) )
 459                         {
 460                             i_numpics--;
 461                             break;
 462                         }
 463                     }
 464
 465                 }
 466             }
 467         }
 468         p_sys->i_rows = ((int)ceil(sqrt( (float)i_numpics )));
 469         p_sys->i_cols = ( i_numpics % p_sys->i_rows == 0 ?
 470                             i_numpics / p_sys->i_rows :
 471                             i_numpics / p_sys->i_rows + 1 );
 472     }
 473
 474     col_inner_width  = ( ( p_sys->i_width - ( p_sys->i_cols - 1 )
 475                        * p_sys->i_vborder ) / p_sys->i_cols );
 476     row_inner_height = ( ( p_sys->i_height - ( p_sys->i_rows - 1 )
 477                        * p_sys->i_hborder ) / p_sys->i_rows );
 478
 479     i_real_index = 0;
 480
 481     for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
 482     {
 483         bridged_es_t *p_es = p_bridge->pp_es[i_index];
 484         video_format_t fmt_in = {0}, fmt_out = {0};
 485         picture_t *p_converted;
 486
 487         if ( p_es->b_empty )
 488             continue;
 489
 490         while ( p_es->p_picture != NULL
 491                  && p_es->p_picture->date + p_sys->i_delay < date )
 492         {
 493             if ( p_es->p_picture->p_next != NULL )
 494             {
 495                 picture_t *p_next = p_es->p_picture->p_next;
 496                 p_es->p_picture->pf_release( p_es->p_picture );
 497                 p_es->p_picture = p_next;
 498             }
 499             else if ( p_es->p_picture->date + p_sys->i_delay + BLANK_DELAY <
 500                         date )
 501             {
 502                 /* Display blank */
 503                 p_es->p_picture->pf_release( p_es->p_picture );
 504                 p_es->p_picture = NULL;
 505                 p_es->pp_last = &p_es->p_picture;
 506                 break;
 507             }
 508             else
 509             {
 510                 msg_Dbg( p_filter, "too late picture for %s (" I64Fd ")",
 511                          p_es->psz_id,
 512                          date - p_es->p_picture->date - p_sys->i_delay );
 513                 break;
 514             }
 515         }
 516
 517         if ( p_es->p_picture == NULL )
 518             continue;
 519
 520         if ( p_sys->i_order_length == 0 )
 521         {
 522             i_real_index++;
 523         }
 524         else
 525         {
 526             int i;
 527             for ( i = 0; i <= p_sys->i_order_length; i++ )
 528             {
 529                 if ( i == p_sys->i_order_length ) break;
 530                 if ( strcmp( p_es->psz_id, p_sys->ppsz_order[i] ) == 0 )
 531                 {
 532                     i_real_index = i;
 533                     break;
 534                 }
 535             }
 536             if ( i == p_sys->i_order_length )
 537                 i_real_index = ++i_greatest_real_index_used;
 538         }
 539         i_row = ( i_real_index / p_sys->i_cols ) % p_sys->i_rows;
 540         i_col = i_real_index % p_sys->i_cols ;
 541
 542         if ( !p_sys->b_keep )
 543         {
 544             /* Convert the images */
 545             fmt_in.i_chroma = p_es->p_picture->format.i_chroma;
 546             fmt_in.i_height = p_es->p_picture->format.i_height;
 547             fmt_in.i_width = p_es->p_picture->format.i_width;
 548
 549             fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 550             fmt_out.i_width = col_inner_width;
 551             fmt_out.i_height = row_inner_height;
 552
 553             if( p_sys->b_ar ) /* keep aspect ratio */
 554             {
 555                 if( (float)fmt_out.i_width / (float)fmt_out.i_height
 556                       > (float)fmt_in.i_width / (float)fmt_in.i_height )
 557                 {
 558                     fmt_out.i_width = ( fmt_out.i_height * fmt_in.i_width )
 559                                          / fmt_in.i_height;
 560                 }
 561                 else
 562                 {
 563                     fmt_out.i_height = ( fmt_out.i_width * fmt_in.i_height )
 564                                         / fmt_in.i_width;
 565                 }
 566              }
 567
 568             fmt_out.i_visible_width = fmt_out.i_width;
 569             fmt_out.i_visible_height = fmt_out.i_height;
 570
 571             p_converted = image_Convert( p_sys->p_image, p_es->p_picture,
 572                                          &fmt_in, &fmt_out );
 573             if( !p_converted )
 574             {
 575                 msg_Warn( p_filter,
 576                            "image resizing and chroma conversion failed" );
 577                 continue;
 578             }
 579
 580             /* Bluescreen stuff */
 581             if( p_sys->b_bs )
 582             {
 583                 int i,j;
 584                 int i_lines = p_converted->p[ A_PLANE ].i_lines;
 585                 int i_pitch = p_converted->p[ A_PLANE ].i_pitch;
 586                 uint8_t *p_a = p_converted->p[ A_PLANE ].p_pixels;
 587                 uint8_t *p_at = malloc( i_lines * i_pitch * sizeof( uint8_t ) );
 588                 uint8_t *p_u = p_converted->p[ U_PLANE ].p_pixels;
 589                 uint8_t *p_v = p_converted->p[ V_PLANE ].p_pixels;
 590                 uint8_t umin, umax, vmin, vmax;
 591                 umin = p_sys->i_bsu - p_sys->i_bsut >= 0x00 ?
 592                        p_sys->i_bsu - p_sys->i_bsut : 0x00;
 593                 umax = p_sys->i_bsu + p_sys->i_bsut <= 0xff ?
 594                        p_sys->i_bsu + p_sys->i_bsut : 0xff;
 595                 vmin = p_sys->i_bsv - p_sys->i_bsvt >= 0x00 ?
 596                        p_sys->i_bsv - p_sys->i_bsvt : 0x00;
 597                 vmax = p_sys->i_bsv + p_sys->i_bsvt <= 0xff ?
 598                        p_sys->i_bsv + p_sys->i_bsvt : 0xff;
 599
 600                 for( i = 0; i < i_lines*i_pitch; i++ )
 601                 {
 602                     if(    p_u[i] < umax
 603                         && p_u[i] > umin
 604                         && p_v[i] < vmax
 605                         && p_v[i] > vmin )
 606                     {
 607                         p_at[i] = 0x00;
 608                     }
 609                     else
 610                     {
 611                         p_at[i] = 0xff;
 612                     }
 613                 }
 614                 /* Gaussian convolution to make it look cleaner */
 615                 memset( p_a, 0, 2 * i_pitch );
 616                 for( i = 2; i < i_lines - 2; i++ )
 617                 {
 618                     p_a[i*i_pitch] = 0x00;
 619                     p_a[i*i_pitch+1] = 0x00;
 620                     for( j = 2; j < i_pitch - 2; j ++ )
 621                     {
 622                         p_a[i*i_pitch+j] = (uint8_t)((
 623                           /* 2 rows up */
 624                             ( p_at[(i-2)*i_pitch+j-2]<<1 )
 625                           + ( p_at[(i-2)*i_pitch+j-1]<<2 )
 626                           + ( p_at[(i-2)*i_pitch+j]<<2 )
 627                           + ( p_at[(i-2)*i_pitch+j+1]<<2 )
 628                           + ( p_at[(i-2)*i_pitch+j+2]<<1 )
 629                           /* 1 row up */
 630                           + ( p_at[(i-1)*i_pitch+j-1]<<3 )
 631                           + ( p_at[(i-1)*i_pitch+j-2]<<2 )
 632                           + ( p_at[(i-1)*i_pitch+j]*12 )
 633                           + ( p_at[(i-1)*i_pitch+j+1]<<3 )
 634                           + ( p_at[(i-1)*i_pitch+j+2]<<2 )
 635                           /* */
 636                           + ( p_at[i*i_pitch+j-2]<<2 )
 637                           + ( p_at[i*i_pitch+j-1]*12 )
 638                           + ( p_at[i*i_pitch+j]<<4 )
 639                           + ( p_at[i*i_pitch+j+1]*12 )
 640                           + ( p_at[i*i_pitch+j+2]<<2 )
 641                           /* 1 row down */
 642                           + ( p_at[(i+1)*i_pitch+j-2]<<2 )
 643                           + ( p_at[(i+1)*i_pitch+j-1]<<3 )
 644                           + ( p_at[(i+1)*i_pitch+j]*12 )
 645                           + ( p_at[(i+1)*i_pitch+j+1]<<3 )
 646                           + ( p_at[(i+1)*i_pitch+j+2]<<2 )
 647                           /* 2 rows down */
 648                           + ( p_at[(i+2)*i_pitch+j-2]<<1 )
 649                           + ( p_at[(i+2)*i_pitch+j-1]<<2 )
 650                           + ( p_at[(i+2)*i_pitch+j]<<2 )
 651                           + ( p_at[(i+2)*i_pitch+j+1]<<2 )
 652                           + ( p_at[(i+2)*i_pitch+j+2]<<1 )
 653                           )/152);
 654                           if( p_a[i*i_pitch+j] < 0xbf ) p_a[i*i_pitch+j] = 0x00;
 655                     }
 656                 }
 657                 free( p_at );
 658             }
 659         }
 660         else
 661         {
 662             p_converted = p_es->p_picture;
 663             p_converted->i_refcount++;
 664             fmt_in.i_width = fmt_out.i_width = p_converted->format.i_width;
 665             fmt_in.i_height = fmt_out.i_height = p_converted->format.i_height;
 666             fmt_in.i_chroma = fmt_out.i_chroma = p_converted->format.i_chroma;
 667             fmt_out.i_visible_width = fmt_out.i_width;
 668             fmt_out.i_visible_height = fmt_out.i_height;
 669         }
 670
 671         p_region = p_spu->pf_make_region( VLC_OBJECT(p_filter), &fmt_out,
 672                                           p_converted );
 673         if( !p_region )
 674         {
 675             msg_Err( p_filter, "cannot allocate SPU region" );
 676             p_filter->pf_sub_buffer_del( p_filter, p_spu );
 677             vlc_mutex_unlock( &p_sys->lock );
 678             vlc_mutex_unlock( p_sys->p_lock );
 679             return p_spu;
 680         }
 681
 682         /* HACK ALERT : let's fix the pointers to avoid picture duplication.
 683          * This is necessary because p_region->picture is not a pointer
 684          * as it ought to be. */
 685         if( !p_sys->b_keep )
 686         {
 687             free( p_converted );
 688         }
 689         else
 690         {
 691             /* Keep a pointer to the original picture (and its refcount...). */
 692             p_region->picture.p_sys = (picture_sys_t *)p_converted;
 693             p_region->picture.pf_release = MosaicReleasePicture;
 694         }
 695
 696         if( fmt_out.i_width > col_inner_width ||
 697             p_sys->b_ar || p_sys->b_keep )
 698         {
 699             /* we don't have to center the video since it takes the
 700             whole rectangle area or it's larger than the rectangle */
 701             p_region->i_x = p_sys->i_xoffset
 702                         + i_col * ( p_sys->i_width / p_sys->i_cols )
 703                         + ( i_col * p_sys->i_vborder ) / p_sys->i_cols;
 704         }
 705         else
 706         {
 707             /* center the video in the dedicated rectangle */
 708             p_region->i_x = p_sys->i_xoffset
 709                     + i_col * ( p_sys->i_width / p_sys->i_cols )
 710                     + ( i_col * p_sys->i_vborder ) / p_sys->i_cols
 711                     + ( col_inner_width - fmt_out.i_width ) / 2;
 712         }
 713
 714         if( fmt_out.i_height < row_inner_height
 715             || p_sys->b_ar || p_sys->b_keep )
 716         {
 717             /* we don't have to center the video since it takes the
 718             whole rectangle area or it's taller than the rectangle */
 719             p_region->i_y = p_sys->i_yoffset
 720                     + i_row * ( p_sys->i_height / p_sys->i_rows )
 721                     + ( i_row * p_sys->i_hborder ) / p_sys->i_rows;
 722         }
 723         else
 724         {
 725             /* center the video in the dedicated rectangle */
 726             p_region->i_y = p_sys->i_yoffset
 727                     + i_row * ( p_sys->i_height / p_sys->i_rows )
 728                     + ( i_row * p_sys->i_hborder ) / p_sys->i_rows
 729                     + ( row_inner_height - fmt_out.i_height ) / 2;
 730         }
 731
 732         if( p_region_prev == NULL )
 733         {
 734             p_spu->p_region = p_region;
 735         }
 736         else
 737         {
 738             p_region_prev->p_next = p_region;
 739         }
 740
 741         p_region_prev = p_region;
 742     }
 743
 744     vlc_mutex_unlock( p_sys->p_lock );
 745     vlc_mutex_unlock( &p_sys->lock );
 746
 747     return p_spu;
 748 }
 749
 750 /*****************************************************************************
 751 * Callback to update params on the fly
 752 *****************************************************************************/
 753 static int MosaicCallback( vlc_object_t *p_this, char const *psz_var,
 754                             vlc_value_t oldval, vlc_value_t newval,
 755                             void *p_data )
 756 {
 757     filter_sys_t *p_sys = (filter_sys_t *) p_data;
 758     if( !strcmp( psz_var, "mosaic-alpha" ) )
 759     {
 760         vlc_mutex_lock( &p_sys->lock );
 761         msg_Dbg( p_this, "changing alpha from %d/255 to %d/255",
 762                          p_sys->i_alpha, newval.i_int);
 763         p_sys->i_alpha = __MIN( __MAX( newval.i_int, 0 ), 255 );
 764         vlc_mutex_unlock( &p_sys->lock );
 765     }
 766     else if( !strcmp( psz_var, "mosaic-height" ) )
 767     {
 768         vlc_mutex_lock( &p_sys->lock );
 769         msg_Dbg( p_this, "changing height from %dpx to %dpx",
 770                           p_sys->i_height, newval.i_int );
 771         p_sys->i_height = __MAX( newval.i_int, 0 );
 772         vlc_mutex_unlock( &p_sys->lock );
 773     }
 774     else if( !strcmp( psz_var, "mosaic-width" ) )
 775     {
 776         vlc_mutex_lock( &p_sys->lock );
 777         msg_Dbg( p_this, "changing width from %dpx to %dpx",
 778                          p_sys->i_width, newval.i_int );
 779         p_sys->i_width = __MAX( newval.i_int, 0 );
 780         vlc_mutex_unlock( &p_sys->lock );
 781     }
 782     else if( !strcmp( psz_var, "mosaic-xoffset" ) )
 783     {
 784         vlc_mutex_lock( &p_sys->lock );
 785         msg_Dbg( p_this, "changing x offset from %dpx to %dpx",
 786                          p_sys->i_xoffset, newval.i_int );
 787         p_sys->i_xoffset = __MAX( newval.i_int, 0 );
 788         vlc_mutex_unlock( &p_sys->lock );
 789     }
 790     else if( !strcmp( psz_var, "mosaic-yoffset" ) )
 791     {
 792         vlc_mutex_lock( &p_sys->lock );
 793         msg_Dbg( p_this, "changing y offset from %dpx to %dpx",
 794                          p_sys->i_yoffset, newval.i_int );
 795         p_sys->i_yoffset = __MAX( newval.i_int, 0 );
 796         vlc_mutex_unlock( &p_sys->lock );
 797     }
 798     else if( !strcmp( psz_var, "mosaic-align" ) )
 799     {
 800         int i_old = 0, i_new = 0;
 801         vlc_mutex_lock( &p_sys->lock );
 802         newval.i_int = __MIN( __MAX( newval.i_int, 0 ), 10 );
 803         if( newval.i_int == 3 || newval.i_int == 7 )
 804             newval.i_int = 5;
 805         while( pi_align_values[i_old] != p_sys->i_align ) i_old++;
 806         while( pi_align_values[i_new] != newval.i_int ) i_new++;
 807         msg_Dbg( p_this, "changing alignment from %d (%s) to %d (%s)",
 808                      p_sys->i_align, ppsz_align_descriptions[i_old],
 809                      newval.i_int, ppsz_align_descriptions[i_new] );
 810         p_sys->i_align = newval.i_int;
 811         vlc_mutex_unlock( &p_sys->lock );
 812     }
 813     else if( !strcmp( psz_var, "mosaic-vborder" ) )
 814     {
 815         vlc_mutex_lock( &p_sys->lock );
 816         msg_Dbg( p_this, "changing vertical border from %dpx to %dpx",
 817                          p_sys->i_vborder, newval.i_int );
 818         p_sys->i_vborder = __MAX( newval.i_int, 0 );
 819         vlc_mutex_unlock( &p_sys->lock );
 820     }
 821     else if( !strcmp( psz_var, "mosaic-hborder" ) )
 822     {
 823         vlc_mutex_lock( &p_sys->lock );
 824         msg_Dbg( p_this, "changing horizontal border from %dpx to %dpx",
 825                          p_sys->i_vborder, newval.i_int );
 826         p_sys->i_hborder = __MAX( newval.i_int, 0 );
 827         vlc_mutex_unlock( &p_sys->lock );
 828     }
 829     else if( !strcmp( psz_var, "mosaic-position" ) )
 830     {
 831         if( newval.i_int > 1 || newval.i_int < 0 )
 832         {
 833             msg_Err( p_this, "Position is either 0 (auto) or 1 (fixed)" );
 834         }
 835         else
 836         {
 837             vlc_mutex_lock( &p_sys->lock );
 838             msg_Dbg( p_this, "changing position method from %d (%s) to %d (%s)",
 839                              p_sys->i_position, ppsz_pos_descriptions[p_sys->i_position],
 840                              newval.i_int, ppsz_pos_descriptions[newval.i_int]);
 841             p_sys->i_position = newval.i_int;
 842             vlc_mutex_unlock( &p_sys->lock );
 843         }
 844     }
 845     else if( !strcmp( psz_var, "mosaic-rows" ) )
 846     {
 847         vlc_mutex_lock( &p_sys->lock );
 848         msg_Dbg( p_this, "changing number of rows from %d to %d",
 849                          p_sys->i_rows, newval.i_int );
 850         p_sys->i_rows = __MAX( newval.i_int, 1 );
 851         vlc_mutex_unlock( &p_sys->lock );
 852     }
 853     else if( !strcmp( psz_var, "mosaic-cols" ) )
 854     {
 855         vlc_mutex_lock( &p_sys->lock );
 856         msg_Dbg( p_this, "changing number of columns from %d to %d",
 857                          p_sys->i_cols, newval.i_int );
 858         p_sys->i_cols = __MAX( newval.i_int, 1 );
 859         vlc_mutex_unlock( &p_sys->lock );
 860     }
 861     else if( !strcmp( psz_var, "mosaic-keep-aspect-ratio" ) )
 862     {
 863         vlc_mutex_lock( &p_sys->lock );
 864         if( newval.i_int )
 865         {
 866             msg_Dbg( p_this, "keeping aspect ratio" );
 867             p_sys->b_ar = 1;
 868         }
 869         else
 870         {
 871             msg_Dbg( p_this, "won't keep aspect ratio" );
 872             p_sys->b_ar = 0;
 873         }
 874         vlc_mutex_unlock( &p_sys->lock );
 875     }
 876     return VLC_SUCCESS;
 877 }