modules/video_filter/mosaic.c

   1 /*****************************************************************************
   2  * mosaic.c : Mosaic video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2004-2008 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea at videolan dot org>
   8  *          Christophe Massiot <massiot@via.ecp.fr>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23 *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34
  35 #include <math.h>
  36 #include <limits.h> /* INT_MAX */
  37
  38 #include <vlc_filter.h>
  39 #include <vlc_image.h>
  40
  41 #include "mosaic.h"
  42
  43 #define BLANK_DELAY INT64_C(1000000)
  44
  45 /*****************************************************************************
  46  * Local prototypes
  47  *****************************************************************************/
  48 static int  CreateFilter    ( vlc_object_t * );
  49 static void DestroyFilter   ( vlc_object_t * );
  50 static subpicture_t *Filter ( filter_t *, mtime_t );
  51
  52 static int MosaicCallback   ( vlc_object_t *, char const *, vlc_value_t,
  53                               vlc_value_t, void * );
  54
  55 /*****************************************************************************
  56  * filter_sys_t : filter descriptor
  57  *****************************************************************************/
  58 struct filter_sys_t
  59 {
  60     vlc_mutex_t lock;         /* Internal filter lock */
  61
  62     image_handler_t *p_image;
  63
  64     int i_position;           /* Mosaic positioning method */
  65     bool b_ar;          /* Do we keep the aspect ratio ? */
  66     bool b_keep;        /* Do we keep the original picture format ? */
  67     int i_width, i_height;    /* Mosaic height and width */
  68     int i_cols, i_rows;       /* Mosaic rows and cols */
  69     int i_align;              /* Mosaic alignment in background video */
  70     int i_xoffset, i_yoffset; /* Top left corner offset */
  71     int i_borderw, i_borderh; /* Border width/height between miniatures */
  72     int i_alpha;              /* Subfilter alpha blending */
  73
  74     char **ppsz_order;        /* List of picture-ids */
  75     int i_order_length;
  76
  77     int *pi_x_offsets;        /* List of substreams x offsets */
  78     int *pi_y_offsets;        /* List of substreams y offsets */
  79     int i_offsets_length;
  80
  81     mtime_t i_delay;
  82 };
  83
  84 /*****************************************************************************
  85  * Module descriptor
  86  *****************************************************************************/
  87 #define ALPHA_TEXT N_("Transparency")
  88 #define ALPHA_LONGTEXT N_( \
  89         "Transparency of the mosaic foreground pictures. " \
  90         "0 means transparent, 255 opaque (default)." )
  91
  92 #define HEIGHT_TEXT N_("Height")
  93 #define HEIGHT_LONGTEXT N_( "Total height of the mosaic, in pixels." )
  94 #define WIDTH_TEXT N_("Width")
  95 #define WIDTH_LONGTEXT N_( "Total width of the mosaic, in pixels." )
  96
  97 #define XOFFSET_TEXT N_("Top left corner X coordinate")
  98 #define XOFFSET_LONGTEXT N_( \
  99         "X Coordinate of the top-left corner of the mosaic.")
 100 #define YOFFSET_TEXT N_("Top left corner Y coordinate")
 101 #define YOFFSET_LONGTEXT N_( \
 102         "Y Coordinate of the top-left corner of the mosaic.")
 103
 104 #define BORDERW_TEXT N_("Border width")
 105 #define BORDERW_LONGTEXT N_( \
 106         "Width in pixels of the border between miniatures." )
 107 #define BORDERH_TEXT N_("Border height")
 108 #define BORDERH_LONGTEXT N_( \
 109         "Height in pixels of the border between miniatures." )
 110
 111 #define ALIGN_TEXT N_("Mosaic alignment" )
 112 #define ALIGN_LONGTEXT N_( \
 113         "You can enforce the mosaic alignment on the video " \
 114         "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
 115         "also use combinations of these values, eg 6 = top-right).")
 116
 117 #define POS_TEXT N_("Positioning method")
 118 #define POS_LONGTEXT N_( \
 119         "Positioning method for the mosaic. auto: " \
 120         "automatically choose the best number of rows and columns. " \
 121         "fixed: use the user-defined number of rows and columns. " \
 122         "offsets: use the user-defined offsets for each image." )
 123
 124 #define ROWS_TEXT N_("Number of rows")
 125 #define ROWS_LONGTEXT N_( \
 126         "Number of image rows in the mosaic (only used if " \
 127         "positioning method is set to \"fixed\")." )
 128
 129 #define COLS_TEXT N_("Number of columns")
 130 #define COLS_LONGTEXT N_( \
 131         "Number of image columns in the mosaic (only used if " \
 132         "positioning method is set to \"fixed\"." )
 133
 134 #define AR_TEXT N_("Keep aspect ratio")
 135 #define AR_LONGTEXT N_( \
 136         "Keep the original aspect ratio when resizing " \
 137         "mosaic elements." )
 138 #define KEEP_TEXT N_("Keep original size")
 139 #define KEEP_LONGTEXT N_( \
 140         "Keep the original size of mosaic elements." )
 141
 142 #define ORDER_TEXT N_("Elements order" )
 143 #define ORDER_LONGTEXT N_( \
 144         "You can enforce the order of the elements on " \
 145         "the mosaic. You must give a comma-separated list of picture ID(s)." \
 146         "These IDs are assigned in the \"mosaic-bridge\" module." )
 147
 148 #define OFFSETS_TEXT N_("Offsets in order" )
 149 #define OFFSETS_LONGTEXT N_( \
 150         "You can enforce the (x,y) offsets of the elements on the mosaic " \
 151         "(only used if positioning method is set to \"offsets\"). You " \
 152         "must give a comma-separated list of coordinates (eg: 10,10,150,10)." )
 153
 154 #define DELAY_TEXT N_("Delay")
 155 #define DELAY_LONGTEXT N_( \
 156         "Pictures coming from the mosaic elements will be delayed " \
 157         "according to this value (in milliseconds). For high " \
 158         "values you will need to raise caching at input.")
 159
 160 enum
 161 {
 162     position_auto = 0, position_fixed = 1, position_offsets = 2
 163 };
 164 static const int pi_pos_values[] = { 0, 1, 2 };
 165 static const char *const ppsz_pos_descriptions[] =
 166     { N_("auto"), N_("fixed"), N_("offsets") };
 167
 168 static const int pi_align_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
 169 static const char *const ppsz_align_descriptions[] =
 170      { N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
 171      N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };
 172
 173 #define CFG_PREFIX "mosaic-"
 174
 175 vlc_module_begin ()
 176     set_description( N_("Mosaic video sub source") )
 177     set_shortname( N_("Mosaic") )
 178     set_category( CAT_VIDEO )
 179     set_subcategory( SUBCAT_VIDEO_SUBPIC)
 180     set_capability( "sub source", 0 )
 181     set_callbacks( CreateFilter, DestroyFilter )
 182
 183     add_integer_with_range( CFG_PREFIX "alpha", 255, 0, 255,
 184                             ALPHA_TEXT, ALPHA_LONGTEXT, false )
 185
 186     add_integer( CFG_PREFIX "height", 100,
 187                  HEIGHT_TEXT, HEIGHT_LONGTEXT, false )
 188     add_integer( CFG_PREFIX "width", 100,
 189                  WIDTH_TEXT, WIDTH_LONGTEXT, false )
 190
 191     add_integer( CFG_PREFIX "align", 5,
 192                  ALIGN_TEXT, ALIGN_LONGTEXT, true)
 193         change_integer_list( pi_align_values, ppsz_align_descriptions )
 194
 195     add_integer( CFG_PREFIX "xoffset", 0,
 196                  XOFFSET_TEXT, XOFFSET_LONGTEXT, true )
 197     add_integer( CFG_PREFIX "yoffset", 0,
 198                  YOFFSET_TEXT, YOFFSET_LONGTEXT, true )
 199
 200     add_integer( CFG_PREFIX "borderw", 0,
 201                  BORDERW_TEXT, BORDERW_LONGTEXT, true )
 202     add_integer( CFG_PREFIX "borderh", 0,
 203                  BORDERH_TEXT, BORDERH_LONGTEXT, true )
 204
 205     add_integer( CFG_PREFIX "position", 0,
 206                  POS_TEXT, POS_LONGTEXT, false )
 207         change_integer_list( pi_pos_values, ppsz_pos_descriptions )
 208     add_integer( CFG_PREFIX "rows", 2,
 209                  ROWS_TEXT, ROWS_LONGTEXT, false )
 210     add_integer( CFG_PREFIX "cols", 2,
 211                  COLS_TEXT, COLS_LONGTEXT, false )
 212
 213     add_bool( CFG_PREFIX "keep-aspect-ratio", false,
 214               AR_TEXT, AR_LONGTEXT, false )
 215     add_bool( CFG_PREFIX "keep-picture", false,
 216               KEEP_TEXT, KEEP_LONGTEXT, false )
 217
 218     add_string( CFG_PREFIX "order", "",
 219                 ORDER_TEXT, ORDER_LONGTEXT, false )
 220
 221     add_string( CFG_PREFIX "offsets", "",
 222                 OFFSETS_TEXT, OFFSETS_LONGTEXT, false )
 223
 224     add_integer( CFG_PREFIX "delay", 0, DELAY_TEXT, DELAY_LONGTEXT,
 225                  false )
 226 vlc_module_end ()
 227
 228 static const char *const ppsz_filter_options[] = {
 229     "alpha", "height", "width", "align", "xoffset", "yoffset",
 230     "borderw", "borderh", "position", "rows", "cols",
 231     "keep-aspect-ratio", "keep-picture", "order", "offsets",
 232     "delay", NULL
 233 };
 234
 235 /*****************************************************************************
 236  * mosaic_ParseSetOffsets:
 237  * parse the "--mosaic-offsets x1,y1,x2,y2,x3,y3" parameter
 238  * and set the corresponding struct filter_sys_t entries.
 239  *****************************************************************************/
 240 static void mosaic_ParseSetOffsets( vlc_object_t *p_this,
 241                                       filter_sys_t *p_sys,
 242                                       char *psz_offsets )
 243 {
 244     if( *psz_offsets )
 245     {
 246         char *psz_end = NULL;
 247         int i_index = 0;
 248         do
 249         {
 250             i_index++;
 251
 252             p_sys->pi_x_offsets = xrealloc( p_sys->pi_x_offsets,
 253                                                    i_index * sizeof(int) );
 254             p_sys->pi_x_offsets[i_index - 1] = atoi( psz_offsets );
 255             psz_end = strchr( psz_offsets, ',' );
 256             psz_offsets = psz_end + 1;
 257
 258             p_sys->pi_y_offsets = xrealloc( p_sys->pi_y_offsets,
 259                                                    i_index * sizeof(int) );
 260             p_sys->pi_y_offsets[i_index - 1] = atoi( psz_offsets );
 261             psz_end = strchr( psz_offsets, ',' );
 262             psz_offsets = psz_end + 1;
 263
 264             msg_Dbg( p_this, CFG_PREFIX "offset: id %d, x=%d, y=%d",
 265                      i_index, p_sys->pi_x_offsets[i_index - 1],
 266                               p_sys->pi_y_offsets[i_index - 1]  );
 267
 268         } while( psz_end );
 269         p_sys->i_offsets_length = i_index;
 270     }
 271 }
 272 #define mosaic_ParseSetOffsets( a, b, c ) \
 273             mosaic_ParseSetOffsets( VLC_OBJECT( a ), b, c )
 274
 275 /*****************************************************************************
 276  * CreateFiler: allocate mosaic video filter
 277  *****************************************************************************/
 278 static int CreateFilter( vlc_object_t *p_this )
 279 {
 280     filter_t *p_filter = (filter_t *)p_this;
 281     filter_sys_t *p_sys;
 282     char *psz_order, *_psz_order;
 283     char *psz_offsets;
 284     int i_index;
 285     int i_command;
 286
 287     /* Allocate structure */
 288     p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
 289     if( p_sys == NULL )
 290         return VLC_ENOMEM;
 291
 292     p_filter->pf_sub_source = Filter;
 293
 294     vlc_mutex_init( &p_sys->lock );
 295     vlc_mutex_lock( &p_sys->lock );
 296
 297     config_ChainParse( p_filter, CFG_PREFIX, ppsz_filter_options,
 298                        p_filter->p_cfg );
 299
 300 #define GET_VAR( name, min, max )                                           \
 301     i_command = var_CreateGetIntegerCommand( p_filter, CFG_PREFIX #name );  \
 302     p_sys->i_##name = VLC_CLIP( i_command, min, max );                \
 303     var_AddCallback( p_filter, CFG_PREFIX #name, MosaicCallback, p_sys );
 304
 305     GET_VAR( width, 0, INT_MAX );
 306     GET_VAR( height, 0, INT_MAX );
 307     GET_VAR( xoffset, 0, INT_MAX );
 308     GET_VAR( yoffset, 0, INT_MAX );
 309
 310     GET_VAR( align, 0, 10 );
 311     if( p_sys->i_align == 3 || p_sys->i_align == 7 )
 312         p_sys->i_align = 5;
 313
 314     GET_VAR( borderw, 0, INT_MAX );
 315     GET_VAR( borderh, 0, INT_MAX );
 316     GET_VAR( rows, 1, INT_MAX );
 317     GET_VAR( cols, 1, INT_MAX );
 318     GET_VAR( alpha, 0, 255 );
 319     GET_VAR( position, 0, 2 );
 320     GET_VAR( delay, 100, INT_MAX );
 321 #undef GET_VAR
 322     p_sys->i_delay *= 1000;
 323
 324     p_sys->b_ar = var_CreateGetBoolCommand( p_filter,
 325                                             CFG_PREFIX "keep-aspect-ratio" );
 326     var_AddCallback( p_filter, CFG_PREFIX "keep-aspect-ratio", MosaicCallback,
 327                      p_sys );
 328
 329     p_sys->b_keep = var_CreateGetBoolCommand( p_filter,
 330                                               CFG_PREFIX "keep-picture" );
 331     if ( !p_sys->b_keep )
 332     {
 333         p_sys->p_image = image_HandlerCreate( p_filter );
 334     }
 335
 336     p_sys->i_order_length = 0;
 337     p_sys->ppsz_order = NULL;
 338     psz_order = var_CreateGetStringCommand( p_filter, CFG_PREFIX "order" );
 339     _psz_order = psz_order;
 340     var_AddCallback( p_filter, CFG_PREFIX "order", MosaicCallback, p_sys );
 341
 342     if( *psz_order )
 343     {
 344         char *psz_end = NULL;
 345         i_index = 0;
 346         do
 347         {
 348             psz_end = strchr( psz_order, ',' );
 349             i_index++;
 350             p_sys->ppsz_order = xrealloc( p_sys->ppsz_order,
 351                                                  i_index * sizeof(char *) );
 352             p_sys->ppsz_order[i_index - 1] = strndup( psz_order,
 353                                            psz_end - psz_order );
 354             psz_order = psz_end+1;
 355         } while( psz_end );
 356         p_sys->i_order_length = i_index;
 357     }
 358
 359     free( _psz_order );
 360
 361     /* Manage specific offsets for substreams */
 362     psz_offsets = var_CreateGetStringCommand( p_filter, CFG_PREFIX "offsets" );
 363     p_sys->i_offsets_length = 0;
 364     p_sys->pi_x_offsets = NULL;
 365     p_sys->pi_y_offsets = NULL;
 366     mosaic_ParseSetOffsets( p_filter, p_sys, psz_offsets );
 367     free( psz_offsets );
 368     var_AddCallback( p_filter, CFG_PREFIX "offsets", MosaicCallback, p_sys );
 369
 370     vlc_mutex_unlock( &p_sys->lock );
 371
 372     return VLC_SUCCESS;
 373 }
 374
 375 /*****************************************************************************
 376  * DestroyFilter: destroy mosaic video filter
 377  *****************************************************************************/
 378 static void DestroyFilter( vlc_object_t *p_this )
 379 {
 380     filter_t *p_filter = (filter_t*)p_this;
 381     filter_sys_t *p_sys = p_filter->p_sys;
 382
 383 #define DEL_CB( name ) \
 384     var_DelCallback( p_filter, CFG_PREFIX #name, MosaicCallback, p_sys )
 385     DEL_CB( width );
 386     DEL_CB( height );
 387     DEL_CB( xoffset );
 388     DEL_CB( yoffset );
 389
 390     DEL_CB( align );
 391
 392     DEL_CB( borderw );
 393     DEL_CB( borderh );
 394     DEL_CB( rows );
 395     DEL_CB( cols );
 396     DEL_CB( alpha );
 397     DEL_CB( position );
 398     DEL_CB( delay );
 399
 400     DEL_CB( keep-aspect-ratio );
 401     DEL_CB( order );
 402 #undef DEL_CB
 403
 404     if( !p_sys->b_keep )
 405     {
 406         image_HandlerDelete( p_sys->p_image );
 407     }
 408
 409     if( p_sys->i_order_length )
 410     {
 411         for( int i_index = 0; i_index < p_sys->i_order_length; i_index++ )
 412         {
 413             free( p_sys->ppsz_order[i_index] );
 414         }
 415         free( p_sys->ppsz_order );
 416     }
 417     if( p_sys->i_offsets_length )
 418     {
 419         free( p_sys->pi_x_offsets );
 420         free( p_sys->pi_y_offsets );
 421         p_sys->i_offsets_length = 0;
 422     }
 423
 424     vlc_mutex_destroy( &p_sys->lock );
 425     free( p_sys );
 426 }
 427
 428 /*****************************************************************************
 429  * Filter
 430  *****************************************************************************/
 431 static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
 432 {
 433     filter_sys_t *p_sys = p_filter->p_sys;
 434     bridge_t *p_bridge;
 435
 436     int i_index, i_real_index, i_row, i_col;
 437     int i_greatest_real_index_used = p_sys->i_order_length - 1;
 438
 439     unsigned int col_inner_width, row_inner_height;
 440
 441     subpicture_region_t *p_region;
 442     subpicture_region_t *p_region_prev = NULL;
 443
 444     /* Allocate the subpicture internal data. */
 445     subpicture_t *p_spu = filter_NewSubpicture( p_filter );
 446     if( !p_spu )
 447         return NULL;
 448
 449     /* Initialize subpicture */
 450     p_spu->i_channel = 0;
 451     p_spu->i_start  = date;
 452     p_spu->i_stop = 0;
 453     p_spu->b_ephemer = true;
 454     p_spu->i_alpha = p_sys->i_alpha;
 455     p_spu->b_absolute = false;
 456
 457     p_spu->i_original_picture_width = p_sys->i_width;
 458     p_spu->i_original_picture_height = p_sys->i_height;
 459
 460     vlc_mutex_lock( &p_sys->lock );
 461     vlc_global_lock( VLC_MOSAIC_MUTEX );
 462
 463     p_bridge = GetBridge( p_filter );
 464     if ( p_bridge == NULL )
 465     {
 466         vlc_global_unlock( VLC_MOSAIC_MUTEX );
 467         vlc_mutex_unlock( &p_sys->lock );
 468         return p_spu;
 469     }
 470
 471     if ( p_sys->i_position == position_offsets )
 472     {
 473         /* If we have either too much or not enough offsets, fall-back
 474          * to automatic positioning. */
 475         if ( p_sys->i_offsets_length != p_sys->i_order_length )
 476         {
 477             msg_Err( p_filter,
 478                      "Number of specified offsets (%d) does not match number "
 479                      "of input substreams in mosaic-order (%d), falling back "
 480                      "to mosaic-position=0",
 481                      p_sys->i_offsets_length, p_sys->i_order_length );
 482             p_sys->i_position = position_auto;
 483         }
 484     }
 485
 486     if ( p_sys->i_position == position_auto )
 487     {
 488         int i_numpics = p_sys->i_order_length; /* keep slots and all */
 489         for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
 490         {
 491             bridged_es_t *p_es = p_bridge->pp_es[i_index];
 492             if ( !p_es->b_empty )
 493             {
 494                 i_numpics ++;
 495                 if( p_sys->i_order_length && p_es->psz_id != NULL )
 496                 {
 497                     /* We also want to leave slots for images given in
 498                      * mosaic-order that are not available in p_vout_picture */
 499                     int i;
 500                     for( i = 0; i < p_sys->i_order_length ; i++ )
 501                     {
 502                         if( !strcmp( p_sys->ppsz_order[i], p_es->psz_id ) )
 503                         {
 504                             i_numpics--;
 505                             break;
 506                         }
 507                     }
 508
 509                 }
 510             }
 511         }
 512         p_sys->i_rows = ceil(sqrt( (double)i_numpics ));
 513         p_sys->i_cols = ( i_numpics % p_sys->i_rows == 0 ?
 514                             i_numpics / p_sys->i_rows :
 515                             i_numpics / p_sys->i_rows + 1 );
 516     }
 517
 518     col_inner_width  = ( ( p_sys->i_width - ( p_sys->i_cols - 1 )
 519                        * p_sys->i_borderw ) / p_sys->i_cols );
 520     row_inner_height = ( ( p_sys->i_height - ( p_sys->i_rows - 1 )
 521                        * p_sys->i_borderh ) / p_sys->i_rows );
 522
 523     i_real_index = 0;
 524
 525     for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
 526     {
 527         bridged_es_t *p_es = p_bridge->pp_es[i_index];
 528         video_format_t fmt_in, fmt_out;
 529         picture_t *p_converted;
 530
 531         memset( &fmt_in, 0, sizeof( video_format_t ) );
 532         memset( &fmt_out, 0, sizeof( video_format_t ) );
 533
 534         if ( p_es->b_empty )
 535             continue;
 536
 537         while ( p_es->p_picture != NULL
 538                  && p_es->p_picture->date + p_sys->i_delay < date )
 539         {
 540             if ( p_es->p_picture->p_next != NULL )
 541             {
 542                 picture_t *p_next = p_es->p_picture->p_next;
 543                 picture_Release( p_es->p_picture );
 544                 p_es->p_picture = p_next;
 545             }
 546             else if ( p_es->p_picture->date + p_sys->i_delay + BLANK_DELAY <
 547                         date )
 548             {
 549                 /* Display blank */
 550                 picture_Release( p_es->p_picture );
 551                 p_es->p_picture = NULL;
 552                 p_es->pp_last = &p_es->p_picture;
 553                 break;
 554             }
 555             else
 556             {
 557                 msg_Dbg( p_filter, "too late picture for %s (%"PRId64 ")",
 558                          p_es->psz_id,
 559                          date - p_es->p_picture->date - p_sys->i_delay );
 560                 break;
 561             }
 562         }
 563
 564         if ( p_es->p_picture == NULL )
 565             continue;
 566
 567         if ( p_sys->i_order_length == 0 )
 568         {
 569             i_real_index++;
 570         }
 571         else
 572         {
 573             int i;
 574             for ( i = 0; i <= p_sys->i_order_length; i++ )
 575             {
 576                 if ( i == p_sys->i_order_length ) break;
 577                 if ( strcmp( p_es->psz_id, p_sys->ppsz_order[i] ) == 0 )
 578                 {
 579                     i_real_index = i;
 580                     break;
 581                 }
 582             }
 583             if ( i == p_sys->i_order_length )
 584                 i_real_index = ++i_greatest_real_index_used;
 585         }
 586         i_row = ( i_real_index / p_sys->i_cols ) % p_sys->i_rows;
 587         i_col = i_real_index % p_sys->i_cols ;
 588
 589         if ( !p_sys->b_keep )
 590         {
 591             /* Convert the images */
 592             fmt_in.i_chroma = p_es->p_picture->format.i_chroma;
 593             fmt_in.i_height = p_es->p_picture->format.i_height;
 594             fmt_in.i_width = p_es->p_picture->format.i_width;
 595
 596             if( fmt_in.i_chroma == VLC_CODEC_YUVA ||
 597                 fmt_in.i_chroma == VLC_CODEC_RGBA )
 598                 fmt_out.i_chroma = VLC_CODEC_YUVA;
 599             else
 600                 fmt_out.i_chroma = VLC_CODEC_I420;
 601             fmt_out.i_width = col_inner_width;
 602             fmt_out.i_height = row_inner_height;
 603
 604             if( p_sys->b_ar ) /* keep aspect ratio */
 605             {
 606                 if( (float)fmt_out.i_width / (float)fmt_out.i_height
 607                       > (float)fmt_in.i_width / (float)fmt_in.i_height )
 608                 {
 609                     fmt_out.i_width = ( fmt_out.i_height * fmt_in.i_width )
 610                                          / fmt_in.i_height;
 611                 }
 612                 else
 613                 {
 614                     fmt_out.i_height = ( fmt_out.i_width * fmt_in.i_height )
 615                                         / fmt_in.i_width;
 616                 }
 617              }
 618
 619             fmt_out.i_visible_width = fmt_out.i_width;
 620             fmt_out.i_visible_height = fmt_out.i_height;
 621
 622             p_converted = image_Convert( p_sys->p_image, p_es->p_picture,
 623                                          &fmt_in, &fmt_out );
 624             if( !p_converted )
 625             {
 626                 msg_Warn( p_filter,
 627                            "image resizing and chroma conversion failed" );
 628                 continue;
 629             }
 630         }
 631         else
 632         {
 633             p_converted = p_es->p_picture;
 634             fmt_in.i_width = fmt_out.i_width = p_converted->format.i_width;
 635             fmt_in.i_height = fmt_out.i_height = p_converted->format.i_height;
 636             fmt_in.i_chroma = fmt_out.i_chroma = p_converted->format.i_chroma;
 637             fmt_out.i_visible_width = fmt_out.i_width;
 638             fmt_out.i_visible_height = fmt_out.i_height;
 639         }
 640
 641         p_region = subpicture_region_New( &fmt_out );
 642         /* FIXME the copy is probably not needed anymore */
 643         if( p_region )
 644             picture_Copy( p_region->p_picture, p_converted );
 645         if( !p_sys->b_keep )
 646             picture_Release( p_converted );
 647
 648         if( !p_region )
 649         {
 650             msg_Err( p_filter, "cannot allocate SPU region" );
 651             filter_DeleteSubpicture( p_filter, p_spu );
 652             vlc_global_unlock( VLC_MOSAIC_MUTEX );
 653             vlc_mutex_unlock( &p_sys->lock );
 654             return p_spu;
 655         }
 656
 657         if( p_es->i_x >= 0 && p_es->i_y >= 0 )
 658         {
 659             p_region->i_x = p_es->i_x;
 660             p_region->i_y = p_es->i_y;
 661         }
 662         else if( p_sys->i_position == position_offsets )
 663         {
 664             p_region->i_x = p_sys->pi_x_offsets[i_real_index];
 665             p_region->i_y = p_sys->pi_y_offsets[i_real_index];
 666         }
 667         else
 668         {
 669             if( fmt_out.i_width > col_inner_width ||
 670                 p_sys->b_ar || p_sys->b_keep )
 671             {
 672                 /* we don't have to center the video since it takes the
 673                 whole rectangle area or it's larger than the rectangle */
 674                 p_region->i_x = p_sys->i_xoffset
 675                             + i_col * ( p_sys->i_width / p_sys->i_cols )
 676                             + ( i_col * p_sys->i_borderw ) / p_sys->i_cols;
 677             }
 678             else
 679             {
 680                 /* center the video in the dedicated rectangle */
 681                 p_region->i_x = p_sys->i_xoffset
 682                         + i_col * ( p_sys->i_width / p_sys->i_cols )
 683                         + ( i_col * p_sys->i_borderw ) / p_sys->i_cols
 684                         + ( col_inner_width - fmt_out.i_width ) / 2;
 685             }
 686
 687             if( fmt_out.i_height > row_inner_height
 688                 || p_sys->b_ar || p_sys->b_keep )
 689             {
 690                 /* we don't have to center the video since it takes the
 691                 whole rectangle area or it's taller than the rectangle */
 692                 p_region->i_y = p_sys->i_yoffset
 693                         + i_row * ( p_sys->i_height / p_sys->i_rows )
 694                         + ( i_row * p_sys->i_borderh ) / p_sys->i_rows;
 695             }
 696             else
 697             {
 698                 /* center the video in the dedicated rectangle */
 699                 p_region->i_y = p_sys->i_yoffset
 700                         + i_row * ( p_sys->i_height / p_sys->i_rows )
 701                         + ( i_row * p_sys->i_borderh ) / p_sys->i_rows
 702                         + ( row_inner_height - fmt_out.i_height ) / 2;
 703             }
 704         }
 705         p_region->i_align = p_sys->i_align;
 706         p_region->i_alpha = p_es->i_alpha;
 707
 708         if( p_region_prev == NULL )
 709         {
 710             p_spu->p_region = p_region;
 711         }
 712         else
 713         {
 714             p_region_prev->p_next = p_region;
 715         }
 716
 717         p_region_prev = p_region;
 718     }
 719
 720     vlc_global_unlock( VLC_MOSAIC_MUTEX );
 721     vlc_mutex_unlock( &p_sys->lock );
 722
 723     return p_spu;
 724 }
 725
 726 /*****************************************************************************
 727 * Callback to update params on the fly
 728 *****************************************************************************/
 729 static int MosaicCallback( vlc_object_t *p_this, char const *psz_var,
 730                             vlc_value_t oldval, vlc_value_t newval,
 731                             void *p_data )
 732 {
 733     VLC_UNUSED(oldval);
 734     filter_sys_t *p_sys = (filter_sys_t *) p_data;
 735
 736 #define VAR_IS( a ) !strcmp( psz_var, CFG_PREFIX a )
 737     if( VAR_IS( "alpha" ) )
 738     {
 739         vlc_mutex_lock( &p_sys->lock );
 740         msg_Dbg( p_this, "changing alpha from %d/255 to %d/255",
 741                          p_sys->i_alpha, (int)newval.i_int);
 742         p_sys->i_alpha = VLC_CLIP( newval.i_int, 0, 255 );
 743         vlc_mutex_unlock( &p_sys->lock );
 744     }
 745     else if( VAR_IS( "height" ) )
 746     {
 747         vlc_mutex_lock( &p_sys->lock );
 748         msg_Dbg( p_this, "changing height from %dpx to %dpx",
 749                           p_sys->i_height, (int)newval.i_int );
 750         p_sys->i_height = __MAX( newval.i_int, 0 );
 751         vlc_mutex_unlock( &p_sys->lock );
 752     }
 753     else if( VAR_IS( "width" ) )
 754     {
 755         vlc_mutex_lock( &p_sys->lock );
 756         msg_Dbg( p_this, "changing width from %dpx to %dpx",
 757                          p_sys->i_width, (int)newval.i_int );
 758         p_sys->i_width = __MAX( newval.i_int, 0 );
 759         vlc_mutex_unlock( &p_sys->lock );
 760     }
 761     else if( VAR_IS( "xoffset" ) )
 762     {
 763         vlc_mutex_lock( &p_sys->lock );
 764         msg_Dbg( p_this, "changing x offset from %dpx to %dpx",
 765                          p_sys->i_xoffset, (int)newval.i_int );
 766         p_sys->i_xoffset = __MAX( newval.i_int, 0 );
 767         vlc_mutex_unlock( &p_sys->lock );
 768     }
 769     else if( VAR_IS( "yoffset" ) )
 770     {
 771         vlc_mutex_lock( &p_sys->lock );
 772         msg_Dbg( p_this, "changing y offset from %dpx to %dpx",
 773                          p_sys->i_yoffset, (int)newval.i_int );
 774         p_sys->i_yoffset = __MAX( newval.i_int, 0 );
 775         vlc_mutex_unlock( &p_sys->lock );
 776     }
 777     else if( VAR_IS( "align" ) )
 778     {
 779         int i_old = 0, i_new = 0;
 780         vlc_mutex_lock( &p_sys->lock );
 781         newval.i_int = VLC_CLIP( newval.i_int, 0, 10 );
 782         if( newval.i_int == 3 || newval.i_int == 7 )
 783             newval.i_int = 5;
 784         while( pi_align_values[i_old] != p_sys->i_align ) i_old++;
 785         while( pi_align_values[i_new] != newval.i_int ) i_new++;
 786         msg_Dbg( p_this, "changing alignment from %d (%s) to %d (%s)",
 787                      p_sys->i_align, ppsz_align_descriptions[i_old],
 788                      (int)newval.i_int, ppsz_align_descriptions[i_new] );
 789         p_sys->i_align = newval.i_int;
 790         vlc_mutex_unlock( &p_sys->lock );
 791     }
 792     else if( VAR_IS( "borderw" ) )
 793     {
 794         vlc_mutex_lock( &p_sys->lock );
 795         msg_Dbg( p_this, "changing border width from %dpx to %dpx",
 796                          p_sys->i_borderw, (int)newval.i_int );
 797         p_sys->i_borderw = __MAX( newval.i_int, 0 );
 798         vlc_mutex_unlock( &p_sys->lock );
 799     }
 800     else if( VAR_IS( "borderh" ) )
 801     {
 802         vlc_mutex_lock( &p_sys->lock );
 803         msg_Dbg( p_this, "changing border height from %dpx to %dpx",
 804                          p_sys->i_borderh, (int)newval.i_int );
 805         p_sys->i_borderh = __MAX( newval.i_int, 0 );
 806         vlc_mutex_unlock( &p_sys->lock );
 807     }
 808     else if( VAR_IS( "position" ) )
 809     {
 810         if( newval.i_int > 2 || newval.i_int < 0 )
 811         {
 812             msg_Err( p_this,
 813                      "Position is either 0 (%s), 1 (%s) or 2 (%s)",
 814                      ppsz_pos_descriptions[0],
 815                      ppsz_pos_descriptions[1],
 816                      ppsz_pos_descriptions[2] );
 817         }
 818         else
 819         {
 820             vlc_mutex_lock( &p_sys->lock );
 821             msg_Dbg( p_this, "changing position method from %d (%s) to %d (%s)",
 822                     p_sys->i_position, ppsz_pos_descriptions[p_sys->i_position],
 823                      (int)newval.i_int, ppsz_pos_descriptions[newval.i_int]);
 824             p_sys->i_position = newval.i_int;
 825             vlc_mutex_unlock( &p_sys->lock );
 826         }
 827     }
 828     else if( VAR_IS( "rows" ) )
 829     {
 830         vlc_mutex_lock( &p_sys->lock );
 831         msg_Dbg( p_this, "changing number of rows from %d to %d",
 832                          p_sys->i_rows, (int)newval.i_int );
 833         p_sys->i_rows = __MAX( newval.i_int, 1 );
 834         vlc_mutex_unlock( &p_sys->lock );
 835     }
 836     else if( VAR_IS( "cols" ) )
 837     {
 838         vlc_mutex_lock( &p_sys->lock );
 839         msg_Dbg( p_this, "changing number of columns from %d to %d",
 840                          p_sys->i_cols, (int)newval.i_int );
 841         p_sys->i_cols = __MAX( newval.i_int, 1 );
 842         vlc_mutex_unlock( &p_sys->lock );
 843     }
 844     else if( VAR_IS( "order" ) )
 845     {
 846         char *psz_order;
 847         int i_index;
 848         vlc_mutex_lock( &p_sys->lock );
 849         msg_Dbg( p_this, "Changing mosaic order to %s", newval.psz_string );
 850
 851         psz_order = newval.psz_string;
 852
 853         while( p_sys->i_order_length-- )
 854         {
 855             free( p_sys->ppsz_order[p_sys->i_order_length] );
 856         }
 857         free( p_sys->ppsz_order );
 858         p_sys->ppsz_order = NULL;
 859
 860         if( *psz_order )
 861         {
 862             char *psz_end = NULL;
 863             i_index = 0;
 864             do
 865             {
 866                 psz_end = strchr( psz_order, ',' );
 867                 i_index++;
 868                 p_sys->ppsz_order = xrealloc( p_sys->ppsz_order,
 869                                                    i_index * sizeof(char *) );
 870                 p_sys->ppsz_order[i_index - 1] = strndup( psz_order,
 871                                            psz_end - psz_order );
 872                 psz_order = psz_end+1;
 873             } while( psz_end );
 874             p_sys->i_order_length = i_index;
 875         }
 876
 877         vlc_mutex_unlock( &p_sys->lock );
 878     }
 879     else if( VAR_IS( "offsets" ) )
 880     {
 881         vlc_mutex_lock( &p_sys->lock );
 882         msg_Info( p_this, "Changing mosaic-offsets to %s", newval.psz_string );
 883
 884         if( p_sys->i_offsets_length != 0 )
 885         {
 886             p_sys->i_offsets_length = 0;
 887             free( p_sys->pi_x_offsets );
 888             free( p_sys->pi_y_offsets );
 889             p_sys->pi_x_offsets = NULL;
 890             p_sys->pi_y_offsets = NULL;
 891         }
 892
 893         mosaic_ParseSetOffsets( p_this, p_sys, newval.psz_string );
 894
 895         vlc_mutex_unlock( &p_sys->lock );
 896     }
 897     else if( VAR_IS( "keep-aspect-ratio" ) )
 898     {
 899         vlc_mutex_lock( &p_sys->lock );
 900         if( newval.i_int )
 901         {
 902             msg_Dbg( p_this, "keeping aspect ratio" );
 903             p_sys->b_ar = 1;
 904         }
 905         else
 906         {
 907             msg_Dbg( p_this, "won't keep aspect ratio" );
 908             p_sys->b_ar = 0;
 909         }
 910         vlc_mutex_unlock( &p_sys->lock );
 911     }
 912     else if( VAR_IS( "keep-picture" ) )
 913     {
 914         vlc_mutex_lock( &p_sys->lock );
 915         p_sys->b_keep = newval.b_bool;
 916         if ( !p_sys->b_keep && !p_sys->p_image )
 917         {
 918             p_sys->p_image = image_HandlerCreate( p_this );
 919         }
 920         vlc_mutex_unlock( &p_sys->lock );
 921     }
 922
 923     return VLC_SUCCESS;
 924 }