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_("Alpha blending")
  91 #define ALPHA_LONGTEXT N_("Alpha blending (0 -> 255). Default is 255")
  92
  93 #define HEIGHT_TEXT N_("Height in pixels")
  94 #define WIDTH_TEXT N_("Width in pixels")
  95 #define XOFFSET_TEXT N_("Top left corner x coordinate")
  96 #define YOFFSET_TEXT N_("Top left corner y coordinate")
  97 #define VBORDER_TEXT N_("Vertical border width in pixels")
  98 #define HBORDER_TEXT N_("Horizontal border width in pixels")
  99 #define ALIGN_TEXT N_("Mosaic alignment")
 100
 101 #define POS_TEXT N_("Positioning method")
 102 #define POS_LONGTEXT N_("Positioning method. auto: automatically choose " \
 103         "the best number of rows and columns. fixed: use the user-defined " \
 104         "number of rows and columns.")
 105 #define ROWS_TEXT N_("Number of rows")
 106 #define COLS_TEXT N_("Number of columns")
 107 #define AR_TEXT N_("Keep aspect ratio when resizing")
 108 #define KEEP_TEXT N_("Keep original size")
 109
 110 #define ORDER_TEXT N_("Order as a comma separated list of picture-id(s)")
 111
 112 #define DELAY_TEXT N_("Delay")
 113 #define DELAY_LONGTEXT N_("Pictures coming from the picture video outputs " \
 114         "will be delayed accordingly (in milliseconds). For high " \
 115         "values you will need to raise file-caching and others.")
 116
 117 #define BLUESCREEN_TEXT N_("Enable bluescreen (aka greenscreen or chroma key) video background replacing")
 118 #define BLUESCREENU_TEXT N_("Bluescreen chroma key U (0-255)")
 119 #define BLUESCREENV_TEXT N_("Bluescreen chroma key V (0-255)")
 120 #define BLUESCREENUTOL_TEXT N_("Bluescreen chroma key U tolerance")
 121 #define BLUESCREENVTOL_TEXT N_("Bluescreen chroma key V tolerance")
 122
 123 static int pi_pos_values[] = { 0, 1 };
 124 static char * ppsz_pos_descriptions[] =
 125 { N_("auto"), N_("fixed") };
 126
 127 static int pi_align_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
 128 static char *ppsz_align_descriptions[] =
 129      { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
 130      N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
 131
 132
 133 vlc_module_begin();
 134     set_description( N_("Mosaic video sub filter") );
 135     set_shortname( N_("Mosaic") );
 136     set_category( CAT_VIDEO );
 137     set_subcategory( SUBCAT_VIDEO_SUBPIC);
 138     set_capability( "sub filter", 0 );
 139     set_callbacks( CreateFilter, DestroyFilter );
 140
 141     add_integer( "mosaic-alpha", 255, NULL, ALPHA_TEXT, ALPHA_LONGTEXT, VLC_FALSE );
 142     add_integer( "mosaic-height", 100, NULL, HEIGHT_TEXT, HEIGHT_TEXT, VLC_FALSE );
 143     add_integer( "mosaic-width", 100, NULL, WIDTH_TEXT, WIDTH_TEXT, VLC_FALSE );
 144     add_integer( "mosaic-align", 5, NULL, ALIGN_TEXT, ALIGN_TEXT, VLC_TRUE);
 145         change_integer_list( pi_align_values, ppsz_align_descriptions, 0 );
 146     add_integer( "mosaic-xoffset", 0, NULL, XOFFSET_TEXT, XOFFSET_TEXT, VLC_TRUE );
 147     add_integer( "mosaic-yoffset", 0, NULL, YOFFSET_TEXT, YOFFSET_TEXT, VLC_TRUE );
 148     add_integer( "mosaic-vborder", 0, NULL, VBORDER_TEXT, VBORDER_TEXT, VLC_TRUE );
 149     add_integer( "mosaic-hborder", 0, NULL, HBORDER_TEXT, HBORDER_TEXT, VLC_TRUE );
 150
 151     add_integer( "mosaic-position", 0, NULL, POS_TEXT, POS_LONGTEXT, VLC_FALSE );
 152         change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );
 153     add_integer( "mosaic-rows", 2, NULL, ROWS_TEXT, ROWS_TEXT, VLC_FALSE );
 154     add_integer( "mosaic-cols", 2, NULL, COLS_TEXT, COLS_TEXT, VLC_FALSE );
 155     add_bool( "mosaic-keep-aspect-ratio", 0, NULL, AR_TEXT, AR_TEXT, VLC_FALSE );
 156     add_bool( "mosaic-keep-picture", 0, NULL, KEEP_TEXT, KEEP_TEXT, VLC_FALSE );
 157     add_string( "mosaic-order", "", NULL, ORDER_TEXT, ORDER_TEXT, VLC_FALSE );
 158
 159     add_integer( "mosaic-delay", 0, NULL, DELAY_TEXT, DELAY_LONGTEXT,
 160                  VLC_FALSE );
 161
 162     add_bool( "mosaic-bs", 0, NULL, BLUESCREEN_TEXT,
 163               BLUESCREEN_TEXT, VLC_FALSE );
 164     add_integer( "mosaic-bsu", 120, NULL, BLUESCREENU_TEXT,
 165                  BLUESCREENU_TEXT, VLC_FALSE );
 166     add_integer( "mosaic-bsv", 90, NULL, BLUESCREENV_TEXT,
 167                  BLUESCREENV_TEXT, VLC_FALSE );
 168     add_integer( "mosaic-bsut", 17, NULL, BLUESCREENUTOL_TEXT,
 169                  BLUESCREENUTOL_TEXT, VLC_FALSE );
 170     add_integer( "mosaic-bsvt", 17, NULL, BLUESCREENVTOL_TEXT,
 171                  BLUESCREENVTOL_TEXT, VLC_FALSE );
 172
 173     var_Create( p_module->p_libvlc, "mosaic-lock", VLC_VAR_MUTEX );
 174 vlc_module_end();
 175
 176
 177 /*****************************************************************************
 178  * CreateFiler: allocate mosaic video filter
 179  *****************************************************************************/
 180 static int CreateFilter( vlc_object_t *p_this )
 181 {
 182     filter_t *p_filter = (filter_t *)p_this;
 183     filter_sys_t *p_sys;
 184     libvlc_t *p_libvlc = p_filter->p_libvlc;
 185     char *psz_order;
 186     int i_index;
 187     vlc_value_t val;
 188
 189     /* The mosaic thread is more important than the decoder threads */
 190     vlc_thread_set_priority( p_this, VLC_THREAD_PRIORITY_OUTPUT );
 191
 192     /* Allocate structure */
 193     p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
 194     if( p_sys == NULL )
 195     {
 196         msg_Err( p_filter, "out of memory" );
 197         return VLC_ENOMEM;
 198     }
 199
 200     p_filter->pf_sub_filter = Filter;
 201     p_sys->p_pic = NULL;
 202
 203     vlc_mutex_init( p_filter, &p_sys->lock );
 204     vlc_mutex_lock( &p_sys->lock );
 205
 206     var_Get( p_libvlc, "mosaic-lock", &val );
 207     p_sys->p_lock = val.p_address;
 208
 209 #define GET_VAR( name, min, max )                                           \
 210     p_sys->i_##name = __MIN( max, __MAX( min,                               \
 211                 var_CreateGetInteger( p_filter, "mosaic-" #name ) ) );      \
 212     var_Destroy( p_filter, "mosaic-" #name );                               \
 213     var_Create( p_libvlc, "mosaic-" #name, VLC_VAR_INTEGER );               \
 214     var_SetInteger( p_libvlc, "mosaic-" #name, p_sys->i_##name );           \
 215     var_AddCallback( p_libvlc, "mosaic-" #name, MosaicCallback, p_sys );
 216
 217     GET_VAR( width, 0, INT_MAX );
 218     GET_VAR( height, 0, INT_MAX );
 219     GET_VAR( xoffset, 0, INT_MAX );
 220     GET_VAR( yoffset, 0, INT_MAX );
 221
 222     p_sys->i_align = __MIN( 10, __MAX( 0,  var_CreateGetInteger( p_filter, "mosaic-align" ) ) );
 223     if( p_sys->i_align == 3 || p_sys->i_align == 7 )
 224         p_sys->i_align = 5;
 225     var_Destroy( p_filter, "mosaic-align" );
 226     var_Create( p_libvlc, "mosaic-align", VLC_VAR_INTEGER );
 227     var_SetInteger( p_libvlc, "mosaic-align", p_sys->i_align );
 228     var_AddCallback( p_libvlc, "mosaic-align", MosaicCallback, p_sys );
 229
 230     GET_VAR( vborder, 0, INT_MAX );
 231     GET_VAR( hborder, 0, INT_MAX );
 232     GET_VAR( rows, 1, INT_MAX );
 233     GET_VAR( cols, 1, INT_MAX );
 234     GET_VAR( alpha, 0, 255 );
 235     GET_VAR( position, 0, 1 );
 236     GET_VAR( delay, 100, INT_MAX );
 237     p_sys->i_delay *= 1000;
 238
 239     p_sys->b_ar = var_CreateGetBool( p_filter, "mosaic-keep-aspect-ratio" );
 240     var_Destroy( p_filter, "mosaic-keep-aspect-ratio" );
 241     var_Create( p_libvlc, "mosaic-keep-aspect-ratio", VLC_VAR_INTEGER );
 242     var_SetBool( p_libvlc, "mosaic-keep-aspect-ratio", p_sys->b_ar );
 243     var_AddCallback( p_libvlc, "mosaic-keep-aspect-ratio", MosaicCallback,
 244                      p_sys );
 245
 246     p_sys->b_keep = var_CreateGetBool( p_filter, "mosaic-keep-picture" );
 247     if ( !p_sys->b_keep )
 248     {
 249         p_sys->p_image = image_HandlerCreate( p_filter );
 250     }
 251
 252     p_sys->i_order_length = 0;
 253     p_sys->ppsz_order = NULL;
 254     psz_order = var_CreateGetString( p_filter, "mosaic-order" );
 255
 256     if( psz_order[0] != 0 )
 257     {
 258         char *psz_end = NULL;
 259         i_index = 0;
 260         do
 261         {
 262             psz_end = strchr( psz_order, ',' );
 263             i_index++;
 264             p_sys->ppsz_order = realloc( p_sys->ppsz_order,
 265                                          i_index * sizeof(char *) );
 266             p_sys->ppsz_order[i_index - 1] = strndup( psz_order,
 267                                            psz_end - psz_order );
 268             psz_order = psz_end+1;
 269         } while( NULL !=  psz_end );
 270         p_sys->i_order_length = i_index;
 271     }
 272
 273     /* Bluescreen specific stuff */
 274     GET_VAR( bsu, 0x00, 0xff );
 275     GET_VAR( bsv, 0x00, 0xff );
 276     GET_VAR( bsut, 0x00, 0xff );
 277     GET_VAR( bsvt, 0x00, 0xff );
 278     p_sys->b_bs = var_CreateGetBool( p_filter, "mosaic-bs" );
 279     var_Destroy( p_filter, "mosaic-bs" );
 280     var_Create( p_libvlc, "mosaic-bs", VLC_VAR_INTEGER );
 281     var_SetBool( p_libvlc, "mosaic-bs", p_sys->b_bs );
 282     var_AddCallback( p_libvlc, "mosaic-bs", MosaicCallback, p_sys );
 283     if( p_sys->b_bs && p_sys->b_keep )
 284     {
 285         msg_Warn( p_filter, "mosaic-keep-picture needs to be disabled for"
 286                             " bluescreen to work" );
 287     }
 288
 289     vlc_mutex_unlock( &p_sys->lock );
 290
 291     return VLC_SUCCESS;
 292 }
 293
 294 /*****************************************************************************
 295  * DestroyFilter: destroy mosaic video filter
 296  *****************************************************************************/
 297 static void DestroyFilter( vlc_object_t *p_this )
 298 {
 299     filter_t *p_filter = (filter_t*)p_this;
 300     filter_sys_t *p_sys = p_filter->p_sys;
 301     libvlc_t *p_libvlc = p_filter->p_libvlc;
 302     int i_index;
 303
 304     vlc_mutex_lock( &p_sys->lock );
 305
 306     if( !p_sys->b_keep )
 307     {
 308         image_HandlerDelete( p_sys->p_image );
 309     }
 310
 311     if( p_sys->i_order_length )
 312     {
 313         for( i_index = 0; i_index < p_sys->i_order_length; i_index++ )
 314         {
 315             free( p_sys->ppsz_order[i_index] );
 316         }
 317         free( p_sys->ppsz_order );
 318     }
 319
 320     var_Destroy( p_libvlc, "mosaic-alpha" );
 321     var_Destroy( p_libvlc, "mosaic-height" );
 322     var_Destroy( p_libvlc, "mosaic-align" );
 323     var_Destroy( p_libvlc, "mosaic-width" );
 324     var_Destroy( p_libvlc, "mosaic-xoffset" );
 325     var_Destroy( p_libvlc, "mosaic-yoffset" );
 326     var_Destroy( p_libvlc, "mosaic-vborder" );
 327     var_Destroy( p_libvlc, "mosaic-hborder" );
 328     var_Destroy( p_libvlc, "mosaic-position" );
 329     var_Destroy( p_libvlc, "mosaic-rows" );
 330     var_Destroy( p_libvlc, "mosaic-cols" );
 331     var_Destroy( p_libvlc, "mosaic-keep-aspect-ratio" );
 332
 333     var_Destroy( p_libvlc, "mosaic-bsu" );
 334     var_Destroy( p_libvlc, "mosaic-bsv" );
 335     var_Destroy( p_libvlc, "mosaic-bsut" );
 336     var_Destroy( p_libvlc, "mosaic-bsvt" );
 337     var_Destroy( p_libvlc, "mosaic-bs" );
 338
 339     if( p_sys->p_pic ) p_sys->p_pic->pf_release( p_sys->p_pic );
 340     vlc_mutex_unlock( &p_sys->lock );
 341     vlc_mutex_destroy( &p_sys->lock );
 342     free( p_sys );
 343 }
 344
 345 /*****************************************************************************
 346  * MosaicReleasePicture : Hack to avoid picture duplication
 347  *****************************************************************************/
 348 static void MosaicReleasePicture( picture_t *p_picture )
 349 {
 350     picture_t *p_original_pic = (picture_t *)p_picture->p_sys;
 351
 352     p_original_pic->pf_release( p_original_pic );
 353 }
 354
 355 /*****************************************************************************
 356  * Filter
 357  *****************************************************************************/
 358 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
 359 {
 360     filter_sys_t *p_sys = p_filter->p_sys;
 361     bridge_t *p_bridge;
 362
 363     subpicture_t *p_spu;
 364
 365     int i_index, i_real_index, i_row, i_col;
 366     int i_greatest_real_index_used = p_sys->i_order_length - 1;
 367
 368     int col_inner_width, row_inner_height;
 369
 370     subpicture_region_t *p_region;
 371     subpicture_region_t *p_region_prev = NULL;
 372
 373     /* Allocate the subpicture internal data. */
 374     p_spu = p_filter->pf_sub_buffer_new( p_filter );
 375     if( !p_spu )
 376     {
 377         return NULL;
 378     }
 379
 380     /* Initialize subpicture */
 381     p_spu->i_channel = 0;
 382     p_spu->i_start  = date;
 383     p_spu->i_stop = 0;
 384     p_spu->b_ephemer = VLC_TRUE;
 385     p_spu->i_alpha = p_sys->i_alpha;
 386     p_spu->i_flags = p_sys->i_align;
 387     p_spu->b_absolute = VLC_FALSE;
 388
 389     vlc_mutex_lock( &p_sys->lock );
 390     vlc_mutex_lock( p_sys->p_lock );
 391
 392     p_bridge = GetBridge( p_filter );
 393     if ( p_bridge == NULL )
 394     {
 395         vlc_mutex_unlock( p_sys->p_lock );
 396         vlc_mutex_unlock( &p_sys->lock );
 397         return p_spu;
 398     }
 399
 400     if ( p_sys->i_position == 0 ) /* use automatic positioning */
 401     {
 402         int i_numpics = p_sys->i_order_length; /* keep slots and all */
 403         for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
 404         {
 405             bridged_es_t *p_es = p_bridge->pp_es[i_index];
 406             if ( !p_es->b_empty )
 407             {
 408                 i_numpics ++;
 409                 if( p_sys->i_order_length && p_es->psz_id != 0 )
 410                 {
 411                     /* We also want to leave slots for images given in
 412                      * mosaic-order that are not available in p_vout_picture */
 413                     int i;
 414                     for( i = 0; i < p_sys->i_order_length ; i++ )
 415                     {
 416                         if( !strcmp( p_sys->ppsz_order[i], p_es->psz_id ) )
 417                         {
 418                             i_numpics--;
 419                             break;
 420                         }
 421                     }
 422
 423                 }
 424             }
 425         }
 426         p_sys->i_rows = ((int)ceil(sqrt( (float)i_numpics )));
 427         p_sys->i_cols = ( i_numpics % p_sys->i_rows == 0 ?
 428                             i_numpics / p_sys->i_rows :
 429                             i_numpics / p_sys->i_rows + 1 );
 430     }
 431
 432     col_inner_width  = ( ( p_sys->i_width - ( p_sys->i_cols - 1 )
 433                        * p_sys->i_vborder ) / p_sys->i_cols );
 434     row_inner_height = ( ( p_sys->i_height - ( p_sys->i_rows - 1 )
 435                        * p_sys->i_hborder ) / p_sys->i_rows );
 436
 437     i_real_index = 0;
 438
 439     for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
 440     {
 441         bridged_es_t *p_es = p_bridge->pp_es[i_index];
 442         video_format_t fmt_in = {0}, fmt_out = {0};
 443         picture_t *p_converted;
 444
 445         if ( p_es->b_empty )
 446             continue;
 447
 448         while ( p_es->p_picture != NULL
 449                  && p_es->p_picture->date + p_sys->i_delay < date )
 450         {
 451             if ( p_es->p_picture->p_next != NULL )
 452             {
 453                 picture_t *p_next = p_es->p_picture->p_next;
 454                 p_es->p_picture->pf_release( p_es->p_picture );
 455                 p_es->p_picture = p_next;
 456             }
 457             else if ( p_es->p_picture->date + p_sys->i_delay + BLANK_DELAY <
 458                         date )
 459             {
 460                 /* Display blank */
 461                 p_es->p_picture->pf_release( p_es->p_picture );
 462                 p_es->p_picture = NULL;
 463                 p_es->pp_last = &p_es->p_picture;
 464                 break;
 465             }
 466             else
 467             {
 468                 msg_Dbg( p_filter, "too late picture for %s (" I64Fd ")",
 469                          p_es->psz_id,
 470                          date - p_es->p_picture->date - p_sys->i_delay );
 471                 break;
 472             }
 473         }
 474
 475         if ( p_es->p_picture == NULL )
 476             continue;
 477
 478         if ( p_sys->i_order_length == 0 )
 479         {
 480             i_real_index++;
 481         }
 482         else
 483         {
 484             int i;
 485             for ( i = 0; i <= p_sys->i_order_length; i++ )
 486             {
 487                 if ( i == p_sys->i_order_length ) break;
 488                 if ( strcmp( p_es->psz_id, p_sys->ppsz_order[i] ) == 0 )
 489                 {
 490                     i_real_index = i;
 491                     break;
 492                 }
 493             }
 494             if ( i == p_sys->i_order_length )
 495                 i_real_index = ++i_greatest_real_index_used;
 496         }
 497         i_row = ( i_real_index / p_sys->i_cols ) % p_sys->i_rows;
 498         i_col = i_real_index % p_sys->i_cols ;
 499
 500         if ( !p_sys->b_keep )
 501         {
 502             /* Convert the images */
 503             fmt_in.i_chroma = p_es->p_picture->format.i_chroma;
 504             fmt_in.i_height = p_es->p_picture->format.i_height;
 505             fmt_in.i_width = p_es->p_picture->format.i_width;
 506
 507             fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 508             fmt_out.i_width = col_inner_width;
 509             fmt_out.i_height = row_inner_height;
 510
 511             if( p_sys->b_ar ) /* keep aspect ratio */
 512             {
 513                 if( (float)fmt_out.i_width / (float)fmt_out.i_height
 514                       > (float)fmt_in.i_width / (float)fmt_in.i_height )
 515                 {
 516                     fmt_out.i_width = ( fmt_out.i_height * fmt_in.i_width )
 517                                          / fmt_in.i_height;
 518                 }
 519                 else
 520                 {
 521                     fmt_out.i_height = ( fmt_out.i_width * fmt_in.i_height )
 522                                         / fmt_in.i_width;
 523                 }
 524              }
 525
 526             fmt_out.i_visible_width = fmt_out.i_width;
 527             fmt_out.i_visible_height = fmt_out.i_height;
 528
 529             p_converted = image_Convert( p_sys->p_image, p_es->p_picture,
 530                                          &fmt_in, &fmt_out );
 531             if( !p_converted )
 532             {
 533                 msg_Warn( p_filter,
 534                            "image resizing and chroma conversion failed" );
 535                 continue;
 536             }
 537
 538             /* Bluescreen stuff */
 539             if( p_sys->b_bs )
 540             {
 541                 int i,j;
 542                 int i_lines = p_converted->p[ A_PLANE ].i_lines;
 543                 int i_pitch = p_converted->p[ A_PLANE ].i_pitch;
 544                 uint8_t *p_a = p_converted->p[ A_PLANE ].p_pixels;
 545                 uint8_t *p_at = malloc( i_lines * i_pitch * sizeof( uint8_t ) );
 546                 uint8_t *p_u = p_converted->p[ U_PLANE ].p_pixels;
 547                 uint8_t *p_v = p_converted->p[ V_PLANE ].p_pixels;
 548                 uint8_t umin, umax, vmin, vmax;
 549                 umin = p_sys->i_bsu - p_sys->i_bsut >= 0x00 ?
 550                        p_sys->i_bsu - p_sys->i_bsut : 0x00;
 551                 umax = p_sys->i_bsu + p_sys->i_bsut <= 0xff ?
 552                        p_sys->i_bsu + p_sys->i_bsut : 0xff;
 553                 vmin = p_sys->i_bsv - p_sys->i_bsvt >= 0x00 ?
 554                        p_sys->i_bsv - p_sys->i_bsvt : 0x00;
 555                 vmax = p_sys->i_bsv + p_sys->i_bsvt <= 0xff ?
 556                        p_sys->i_bsv + p_sys->i_bsvt : 0xff;
 557
 558                 for( i = 0; i < i_lines*i_pitch; i++ )
 559                 {
 560                     if(    p_u[i] < umax
 561                         && p_u[i] > umin
 562                         && p_v[i] < vmax
 563                         && p_v[i] > vmin )
 564                     {
 565                         p_at[i] = 0x00;
 566                     }
 567                     else
 568                     {
 569                         p_at[i] = 0xff;
 570                     }
 571                 }
 572                 /* Gaussian convolution to make it look cleaner */
 573                 memset( p_a, 0, 2 * i_pitch );
 574                 for( i = 2; i < i_lines - 2; i++ )
 575                 {
 576                     p_a[i*i_pitch] = 0x00;
 577                     p_a[i*i_pitch+1] = 0x00;
 578                     for( j = 2; j < i_pitch - 2; j ++ )
 579                     {
 580                         p_a[i*i_pitch+j] = (uint8_t)((
 581                           /* 2 rows up */
 582                             ( p_at[(i-2)*i_pitch+j-2]<<1 )
 583                           + ( p_at[(i-2)*i_pitch+j-1]<<2 )
 584                           + ( p_at[(i-2)*i_pitch+j]<<2 )
 585                           + ( p_at[(i-2)*i_pitch+j+1]<<2 )
 586                           + ( p_at[(i-2)*i_pitch+j+2]<<1 )
 587                           /* 1 row up */
 588                           + ( p_at[(i-1)*i_pitch+j-1]<<3 )
 589                           + ( p_at[(i-1)*i_pitch+j-2]<<2 )
 590                           + ( p_at[(i-1)*i_pitch+j]*12 )
 591                           + ( p_at[(i-1)*i_pitch+j+1]<<3 )
 592                           + ( p_at[(i-1)*i_pitch+j+2]<<2 )
 593                           /* */
 594                           + ( p_at[i*i_pitch+j-2]<<2 )
 595                           + ( p_at[i*i_pitch+j-1]*12 )
 596                           + ( p_at[i*i_pitch+j]<<4 )
 597                           + ( p_at[i*i_pitch+j+1]*12 )
 598                           + ( p_at[i*i_pitch+j+2]<<2 )
 599                           /* 1 row down */
 600                           + ( p_at[(i+1)*i_pitch+j-2]<<2 )
 601                           + ( p_at[(i+1)*i_pitch+j-1]<<3 )
 602                           + ( p_at[(i+1)*i_pitch+j]*12 )
 603                           + ( p_at[(i+1)*i_pitch+j+1]<<3 )
 604                           + ( p_at[(i+1)*i_pitch+j+2]<<2 )
 605                           /* 2 rows down */
 606                           + ( p_at[(i+2)*i_pitch+j-2]<<1 )
 607                           + ( p_at[(i+2)*i_pitch+j-1]<<2 )
 608                           + ( p_at[(i+2)*i_pitch+j]<<2 )
 609                           + ( p_at[(i+2)*i_pitch+j+1]<<2 )
 610                           + ( p_at[(i+2)*i_pitch+j+2]<<1 )
 611                           )/152);
 612                           if( p_a[i*i_pitch+j] < 0xbf ) p_a[i*i_pitch+j] = 0x00;
 613                     }
 614                 }
 615                 free( p_at );
 616             }
 617         }
 618         else
 619         {
 620             p_converted = p_es->p_picture;
 621             p_converted->i_refcount++;
 622             fmt_in.i_width = fmt_out.i_width = p_converted->format.i_width;
 623             fmt_in.i_height = fmt_out.i_height = p_converted->format.i_height;
 624             fmt_in.i_chroma = fmt_out.i_chroma = p_converted->format.i_chroma;
 625             fmt_out.i_visible_width = fmt_out.i_width;
 626             fmt_out.i_visible_height = fmt_out.i_height;
 627         }
 628
 629         p_region = p_spu->pf_make_region( VLC_OBJECT(p_filter), &fmt_out,
 630                                           p_converted );
 631         if( !p_region )
 632         {
 633             msg_Err( p_filter, "cannot allocate SPU region" );
 634             p_filter->pf_sub_buffer_del( p_filter, p_spu );
 635             vlc_mutex_unlock( &p_sys->lock );
 636             vlc_mutex_unlock( p_sys->p_lock );
 637             return p_spu;
 638         }
 639
 640         /* HACK ALERT : let's fix the pointers to avoid picture duplication.
 641          * This is necessary because p_region->picture is not a pointer
 642          * as it ought to be. */
 643         if( !p_sys->b_keep )
 644         {
 645             free( p_converted );
 646         }
 647         else
 648         {
 649             /* Keep a pointer to the original picture (and its refcount...). */
 650             p_region->picture.p_sys = (picture_sys_t *)p_converted;
 651             p_region->picture.pf_release = MosaicReleasePicture;
 652         }
 653
 654         if( fmt_out.i_width > col_inner_width ||
 655             p_sys->b_ar || p_sys->b_keep )
 656         {
 657             /* we don't have to center the video since it takes the
 658             whole rectangle area or it's larger than the rectangle */
 659             p_region->i_x = p_sys->i_xoffset
 660                         + i_col * ( p_sys->i_width / p_sys->i_cols )
 661                         + ( i_col * p_sys->i_vborder ) / p_sys->i_cols;
 662         }
 663         else
 664         {
 665             /* center the video in the dedicated rectangle */
 666             p_region->i_x = p_sys->i_xoffset
 667                     + i_col * ( p_sys->i_width / p_sys->i_cols )
 668                     + ( i_col * p_sys->i_vborder ) / p_sys->i_cols
 669                     + ( col_inner_width - fmt_out.i_width ) / 2;
 670         }
 671
 672         if( fmt_out.i_height < row_inner_height
 673             || p_sys->b_ar || p_sys->b_keep )
 674         {
 675             /* we don't have to center the video since it takes the
 676             whole rectangle area or it's taller than the rectangle */
 677             p_region->i_y = p_sys->i_yoffset
 678                     + i_row * ( p_sys->i_height / p_sys->i_rows )
 679                     + ( i_row * p_sys->i_hborder ) / p_sys->i_rows;
 680         }
 681         else
 682         {
 683             /* center the video in the dedicated rectangle */
 684             p_region->i_y = p_sys->i_yoffset
 685                     + i_row * ( p_sys->i_height / p_sys->i_rows )
 686                     + ( i_row * p_sys->i_hborder ) / p_sys->i_rows
 687                     + ( row_inner_height - fmt_out.i_height ) / 2;
 688         }
 689
 690         if( p_region_prev == NULL )
 691         {
 692             p_spu->p_region = p_region;
 693         }
 694         else
 695         {
 696             p_region_prev->p_next = p_region;
 697         }
 698
 699         p_region_prev = p_region;
 700     }
 701
 702     vlc_mutex_unlock( p_sys->p_lock );
 703     vlc_mutex_unlock( &p_sys->lock );
 704
 705     return p_spu;
 706 }
 707
 708 /*****************************************************************************
 709 * Callback to update params on the fly
 710 *****************************************************************************/
 711 static int MosaicCallback( vlc_object_t *p_this, char const *psz_var,
 712                             vlc_value_t oldval, vlc_value_t newval,
 713                             void *p_data )
 714 {
 715     filter_sys_t *p_sys = (filter_sys_t *) p_data;
 716     if( !strcmp( psz_var, "mosaic-alpha" ) )
 717     {
 718         vlc_mutex_lock( &p_sys->lock );
 719         msg_Dbg( p_this, "Changing alpha from %d/255 to %d/255",
 720                          p_sys->i_alpha, newval.i_int);
 721         p_sys->i_alpha = __MIN( __MAX( newval.i_int, 0 ), 255 );
 722         vlc_mutex_unlock( &p_sys->lock );
 723     }
 724     else if( !strcmp( psz_var, "mosaic-height" ) )
 725     {
 726         vlc_mutex_lock( &p_sys->lock );
 727         msg_Dbg( p_this, "Changing height from %dpx to %dpx",
 728                           p_sys->i_height, newval.i_int );
 729         p_sys->i_height = __MAX( newval.i_int, 0 );
 730         vlc_mutex_unlock( &p_sys->lock );
 731     }
 732     else if( !strcmp( psz_var, "mosaic-width" ) )
 733     {
 734         vlc_mutex_lock( &p_sys->lock );
 735         msg_Dbg( p_this, "Changing width from %dpx to %dpx",
 736                          p_sys->i_width, newval.i_int );
 737         p_sys->i_width = __MAX( newval.i_int, 0 );
 738         vlc_mutex_unlock( &p_sys->lock );
 739     }
 740     else if( !strcmp( psz_var, "mosaic-xoffset" ) )
 741     {
 742         vlc_mutex_lock( &p_sys->lock );
 743         msg_Dbg( p_this, "Changing x offset from %dpx to %dpx",
 744                          p_sys->i_xoffset, newval.i_int );
 745         p_sys->i_xoffset = __MAX( newval.i_int, 0 );
 746         vlc_mutex_unlock( &p_sys->lock );
 747     }
 748     else if( !strcmp( psz_var, "mosaic-yoffset" ) )
 749     {
 750         vlc_mutex_lock( &p_sys->lock );
 751         msg_Dbg( p_this, "Changing y offset from %dpx to %dpx",
 752                          p_sys->i_yoffset, newval.i_int );
 753         p_sys->i_yoffset = __MAX( newval.i_int, 0 );
 754         vlc_mutex_unlock( &p_sys->lock );
 755     }
 756     else if( !strcmp( psz_var, "mosaic-align" ) )
 757     {
 758         int i_old = 0, i_new = 0;
 759         vlc_mutex_lock( &p_sys->lock );
 760         newval.i_int = __MIN( __MAX( newval.i_int, 0 ), 10 );
 761         if( newval.i_int == 3 || newval.i_int == 7 )
 762             newval.i_int = 5;
 763         while( pi_align_values[i_old] != p_sys->i_align ) i_old++;
 764         while( pi_align_values[i_new] != newval.i_int ) i_new++;
 765         msg_Dbg( p_this, "Changing alignment from %d (%s) to %d (%s)",
 766                      p_sys->i_align, ppsz_align_descriptions[i_old],
 767                      newval.i_int, ppsz_align_descriptions[i_new] );
 768         p_sys->i_align = newval.i_int;
 769         vlc_mutex_unlock( &p_sys->lock );
 770     }
 771     else if( !strcmp( psz_var, "mosaic-vborder" ) )
 772     {
 773         vlc_mutex_lock( &p_sys->lock );
 774         msg_Dbg( p_this, "Changing vertical border from %dpx to %dpx",
 775                          p_sys->i_vborder, newval.i_int );
 776         p_sys->i_vborder = __MAX( newval.i_int, 0 );
 777         vlc_mutex_unlock( &p_sys->lock );
 778     }
 779     else if( !strcmp( psz_var, "mosaic-hborder" ) )
 780     {
 781         vlc_mutex_lock( &p_sys->lock );
 782         msg_Dbg( p_this, "Changing horizontal border from %dpx to %dpx",
 783                          p_sys->i_vborder, newval.i_int );
 784         p_sys->i_hborder = __MAX( newval.i_int, 0 );
 785         vlc_mutex_unlock( &p_sys->lock );
 786     }
 787     else if( !strcmp( psz_var, "mosaic-position" ) )
 788     {
 789         if( newval.i_int > 1 || newval.i_int < 0 )
 790         {
 791             msg_Err( p_this, "Position is either 0 (auto) or 1 (fixed)" );
 792         }
 793         else
 794         {
 795             vlc_mutex_lock( &p_sys->lock );
 796             msg_Dbg( p_this, "Changing position method from %d (%s) to %d (%s)",
 797                              p_sys->i_position, ppsz_pos_descriptions[p_sys->i_position],
 798                              newval.i_int, ppsz_pos_descriptions[newval.i_int]);
 799             p_sys->i_position = newval.i_int;
 800             vlc_mutex_unlock( &p_sys->lock );
 801         }
 802     }
 803     else if( !strcmp( psz_var, "mosaic-rows" ) )
 804     {
 805         vlc_mutex_lock( &p_sys->lock );
 806         msg_Dbg( p_this, "Changing number of rows from %d to %d",
 807                          p_sys->i_rows, newval.i_int );
 808         p_sys->i_rows = __MAX( newval.i_int, 1 );
 809         vlc_mutex_unlock( &p_sys->lock );
 810     }
 811     else if( !strcmp( psz_var, "mosaic-cols" ) )
 812     {
 813         vlc_mutex_lock( &p_sys->lock );
 814         msg_Dbg( p_this, "Changing number of columns from %d to %d",
 815                          p_sys->i_cols, newval.i_int );
 816         p_sys->i_cols = __MAX( newval.i_int, 1 );
 817         vlc_mutex_unlock( &p_sys->lock );
 818     }
 819     else if( !strcmp( psz_var, "mosaic-keep-aspect-ratio" ) )
 820     {
 821         vlc_mutex_lock( &p_sys->lock );
 822         if( newval.i_int )
 823         {
 824             msg_Dbg( p_this, "Keep aspect ratio" );
 825             p_sys->b_ar = 1;
 826         }
 827         else
 828         {
 829             msg_Dbg( p_this, "Don't keep aspect ratio" );
 830             p_sys->b_ar = 0;
 831         }
 832         vlc_mutex_unlock( &p_sys->lock );
 833     }
 834     return VLC_SUCCESS;
 835 }