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

   1 /*****************************************************************************
   2  * wall.c : Wall video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001, 2002, 2003 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28 #include <string.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc_vout.h>
  32
  33 #include "filter_common.h"
  34
  35 /*****************************************************************************
  36  * Local prototypes
  37  *****************************************************************************/
  38 static int  Create    ( vlc_object_t * );
  39 static void Destroy   ( vlc_object_t * );
  40
  41 static int  Init      ( vout_thread_t * );
  42 static void End       ( vout_thread_t * );
  43 static void Render    ( vout_thread_t *, picture_t * );
  44
  45 static void RemoveAllVout  ( vout_thread_t *p_vout );
  46
  47 static int  SendEvents( vlc_object_t *, char const *,
  48                         vlc_value_t, vlc_value_t, void * );
  49
  50 /*****************************************************************************
  51  * Module descriptor
  52  *****************************************************************************/
  53 #define COLS_TEXT N_("Number of columns")
  54 #define COLS_LONGTEXT N_("Number of horizontal windows in " \
  55     "which to split the video.")
  56
  57 #define ROWS_TEXT N_("Number of rows")
  58 #define ROWS_LONGTEXT N_("Number of vertical windows in " \
  59     "which to split the video.")
  60
  61 #define ACTIVE_TEXT N_("Active windows")
  62 #define ACTIVE_LONGTEXT N_("Comma-separated list of active windows, " \
  63     "defaults to all")
  64
  65 #define ASPECT_TEXT N_("Element aspect ratio")
  66 #define ASPECT_LONGTEXT N_("Aspect ratio of the individual displays " \
  67    "building the wall.")
  68
  69 #define CFG_PREFIX "wall-"
  70
  71 vlc_module_begin();
  72     set_description( _("Wall video filter") );
  73     set_shortname( _("Image wall" ));
  74     set_capability( "video filter", 0 );
  75     set_category( CAT_VIDEO );
  76     set_subcategory( SUBCAT_VIDEO_VFILTER );
  77
  78     add_integer( CFG_PREFIX "cols", 3, NULL, COLS_TEXT, COLS_LONGTEXT, VLC_FALSE );
  79     add_integer( CFG_PREFIX "rows", 3, NULL, ROWS_TEXT, ROWS_LONGTEXT, VLC_FALSE );
  80     add_string( CFG_PREFIX "active", NULL, NULL, ACTIVE_TEXT, ACTIVE_LONGTEXT,
  81                  VLC_TRUE );
  82     add_string( CFG_PREFIX "element-aspect", "4:3", NULL, ASPECT_TEXT, ASPECT_LONGTEXT, VLC_FALSE );
  83
  84     add_shortcut( "wall" );
  85     set_callbacks( Create, Destroy );
  86 vlc_module_end();
  87
  88 static const char *ppsz_filter_options[] = {
  89     "cols", "rows", "active", "element-aspect", NULL
  90 };
  91
  92 /*****************************************************************************
  93  * vout_sys_t: Wall video output method descriptor
  94  *****************************************************************************
  95  * This structure is part of the video output thread descriptor.
  96  * It describes the Wall specific properties of an output thread.
  97  *****************************************************************************/
  98 struct vout_sys_t
  99 {
 100     int    i_col;
 101     int    i_row;
 102     int    i_vout;
 103     struct vout_list_t
 104     {
 105         vlc_bool_t b_active;
 106         int i_width;
 107         int i_height;
 108         int i_left;
 109         int i_top;
 110         vout_thread_t *p_vout;
 111     } *pp_vout;
 112 };
 113
 114 /*****************************************************************************
 115  * Control: control facility for the vout (forwards to child vout)
 116  *****************************************************************************/
 117 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 118 {
 119     int i_row, i_col, i_vout = 0;
 120
 121     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 122     {
 123         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 124         {
 125             vout_vaControl( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 126                             i_query, args );
 127             i_vout++;
 128         }
 129     }
 130     return VLC_SUCCESS;
 131 }
 132
 133 /*****************************************************************************
 134  * Create: allocates Wall video thread output method
 135  *****************************************************************************
 136  * This function allocates and initializes a Wall vout method.
 137  *****************************************************************************/
 138 static int Create( vlc_object_t *p_this )
 139 {
 140     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 141     char *psz_method, *psz_tmp, *psz_method_tmp;
 142     int i_vout;
 143
 144     /* Allocate structure */
 145     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 146     if( p_vout->p_sys == NULL )
 147     {
 148         msg_Err( p_vout, "out of memory" );
 149         return VLC_ENOMEM;
 150     }
 151
 152     p_vout->pf_init = Init;
 153     p_vout->pf_end = End;
 154     p_vout->pf_manage = NULL;
 155     p_vout->pf_render = Render;
 156     p_vout->pf_display = NULL;
 157     p_vout->pf_control = Control;
 158
 159     config_ChainParse( p_vout, CFG_PREFIX, ppsz_filter_options,
 160                        p_vout->p_cfg );
 161
 162     /* Look what method was requested */
 163     p_vout->p_sys->i_col = var_CreateGetInteger( p_vout, CFG_PREFIX "cols" );
 164     p_vout->p_sys->i_row = var_CreateGetInteger( p_vout, CFG_PREFIX "rows" );
 165
 166     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 167     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 168
 169     msg_Dbg( p_vout, "opening a %i x %i wall",
 170              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 171
 172     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 173                                      p_vout->p_sys->i_col *
 174                                      sizeof(struct vout_list_t) );
 175     if( p_vout->p_sys->pp_vout == NULL )
 176     {
 177         msg_Err( p_vout, "out of memory" );
 178         free( p_vout->p_sys );
 179         return VLC_ENOMEM;
 180     }
 181
 182     psz_method_tmp =
 183     psz_method = var_CreateGetNonEmptyString( p_vout, CFG_PREFIX "active" );
 184
 185     /* If no trailing vout are specified, take them all */
 186     if( psz_method == NULL )
 187     {
 188         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 189              i_vout--; )
 190         {
 191             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 192         }
 193     }
 194     /* If trailing vout are specified, activate only the requested ones */
 195     else
 196     {
 197         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 198              i_vout--; )
 199         {
 200             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 201         }
 202
 203         while( *psz_method )
 204         {
 205             psz_tmp = psz_method;
 206             while( *psz_tmp && *psz_tmp != ',' )
 207             {
 208                 psz_tmp++;
 209             }
 210
 211             if( *psz_tmp )
 212             {
 213                 *psz_tmp = '\0';
 214                 i_vout = atoi( psz_method );
 215                 psz_method = psz_tmp + 1;
 216             }
 217             else
 218             {
 219                 i_vout = atoi( psz_method );
 220                 psz_method = psz_tmp;
 221             }
 222
 223             if( i_vout >= 0 &&
 224                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 225             {
 226                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 227             }
 228         }
 229     }
 230
 231     free( psz_method_tmp );
 232
 233     return VLC_SUCCESS;
 234 }
 235
 236 /*****************************************************************************
 237  * Init: initialize Wall video thread output method
 238  *****************************************************************************/
 239 static int Init( vout_thread_t *p_vout )
 240 {
 241     int i_index, i_row, i_col, i_width, i_height, i_left, i_top;
 242     unsigned int i_target_width,i_target_height;
 243     picture_t *p_pic;
 244     video_format_t fmt;
 245     int i_aspect = 4*VOUT_ASPECT_FACTOR/3;
 246     int i_align = 0;
 247     unsigned int i_hstart, i_hend, i_vstart, i_vend;
 248     unsigned int w1,h1,w2,h2;
 249     int i_xpos, i_ypos;
 250     int i_vstart_rounded = 0, i_hstart_rounded = 0;
 251     char *psz_aspect;
 252
 253     memset( &fmt, 0, sizeof(video_format_t) );
 254
 255     psz_aspect = var_CreateGetNonEmptyString( p_vout,
 256                                               CFG_PREFIX "element-aspect" );
 257     if( psz_aspect && *psz_aspect )
 258     {
 259         char *psz_parser = strchr( psz_aspect, ':' );
 260         if( psz_parser )
 261         {
 262             *psz_parser++ = '\0';
 263             i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR
 264                 / atoi( psz_parser );
 265         }
 266         else
 267         {
 268             msg_Warn( p_vout, "invalid aspect ratio specification" );
 269         }
 270         free( psz_aspect );
 271     }
 272
 273     i_xpos = var_CreateGetInteger( p_vout, "video-x" );
 274     i_ypos = var_CreateGetInteger( p_vout, "video-y" );
 275     if( i_xpos < 0 ) i_xpos = 0;
 276     if( i_ypos < 0 ) i_ypos = 0;
 277
 278     I_OUTPUTPICTURES = 0;
 279
 280     /* Initialize the output structure */
 281     p_vout->output.i_chroma = p_vout->render.i_chroma;
 282     p_vout->output.i_width  = p_vout->render.i_width;
 283     p_vout->output.i_height = p_vout->render.i_height;
 284     p_vout->output.i_aspect = p_vout->render.i_aspect;
 285     var_Create( p_vout, "align", VLC_VAR_INTEGER );
 286
 287     fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
 288     fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
 289     fmt.i_x_offset = fmt.i_y_offset = 0;
 290     fmt.i_chroma = p_vout->render.i_chroma;
 291     fmt.i_aspect = p_vout->render.i_aspect;
 292     fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
 293     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 294
 295     w1 = p_vout->output.i_width / p_vout->p_sys->i_col;
 296     w1 &= ~1;
 297     h1 = w1 * VOUT_ASPECT_FACTOR / i_aspect&~1;
 298     h1 &= ~1;
 299
 300     h2 = p_vout->output.i_height / p_vout->p_sys->i_row&~1;
 301     h2 &= ~1;
 302     w2 = h2 * i_aspect / VOUT_ASPECT_FACTOR&~1;
 303     w2 &= ~1;
 304
 305     if ( h1 * p_vout->p_sys->i_row < p_vout->output.i_height )
 306     {
 307         unsigned int i_tmp;
 308         i_target_width = w2;
 309         i_target_height = h2;
 310         i_vstart = 0;
 311         i_vend = p_vout->output.i_height;
 312         i_tmp = i_target_width * p_vout->p_sys->i_col;
 313         while( i_tmp < p_vout->output.i_width ) i_tmp += p_vout->p_sys->i_col;
 314         i_hstart = (( i_tmp - p_vout->output.i_width ) / 2)&~1;
 315         i_hstart_rounded  = ( ( i_tmp - p_vout->output.i_width ) % 2 ) ||
 316             ( ( ( i_tmp - p_vout->output.i_width ) / 2 ) & 1 );
 317         i_hend = i_hstart + p_vout->output.i_width;
 318     }
 319     else
 320     {
 321         unsigned int i_tmp;
 322         i_target_height = h1;
 323         i_target_width = w1;
 324         i_hstart = 0;
 325         i_hend = p_vout->output.i_width;
 326         i_tmp = i_target_height * p_vout->p_sys->i_row;
 327         while( i_tmp < p_vout->output.i_height ) i_tmp += p_vout->p_sys->i_row;
 328         i_vstart = ( ( i_tmp - p_vout->output.i_height ) / 2 ) & ~1;
 329         i_vstart_rounded  = ( ( i_tmp - p_vout->output.i_height ) % 2 ) ||
 330             ( ( ( i_tmp - p_vout->output.i_height ) / 2 ) & 1 );
 331         i_vend = i_vstart + p_vout->output.i_height;
 332     }
 333     msg_Dbg( p_vout, "target resolution %dx%d", i_target_width, i_target_height );
 334
 335     /* Try to open the real video output */
 336     msg_Dbg( p_vout, "spawning the real video outputs" );
 337
 338     p_vout->p_sys->i_vout = 0;
 339     msg_Dbg( p_vout, "target window (%d,%d)-(%d,%d)", i_hstart,i_vstart,i_hend,i_vend );
 340
 341
 342     i_top = 0;
 343     i_height = 0;
 344     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 345     {
 346         i_left = 0;
 347         i_top += i_height;
 348         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 349         {
 350             i_align = 0;
 351
 352             if( i_col*i_target_width >= i_hstart &&
 353                 (i_col+1)*i_target_width <= i_hend )
 354             {
 355                 i_width = i_target_width;
 356             }
 357             else if( ( i_col + 1 ) * i_target_width < i_hstart ||
 358                      ( i_col * i_target_width ) > i_hend )
 359             {
 360                 i_width = 0;
 361             }
 362             else
 363             {
 364                 i_width = ( i_target_width - i_hstart % i_target_width );
 365                 if( i_col >= ( p_vout->p_sys->i_col / 2 ) )
 366                 {
 367                     i_align |= VOUT_ALIGN_LEFT;
 368                     i_width -= i_hstart_rounded ? 2: 0;
 369                 }
 370                 else
 371                 {
 372                     i_align |= VOUT_ALIGN_RIGHT;
 373                 }
 374             }
 375
 376             if( i_row * i_target_height >= i_vstart &&
 377                 ( i_row + 1 ) * i_target_height <= i_vend )
 378             {
 379                 i_height = i_target_height;
 380             }
 381             else if( ( i_row + 1 ) * i_target_height < i_vstart ||
 382                      ( i_row * i_target_height ) > i_vend )
 383             {
 384                 i_height = 0;
 385             }
 386             else
 387             {
 388                 i_height = ( i_target_height -
 389                              i_vstart%i_target_height );
 390                 if(  i_row >= ( p_vout->p_sys->i_row / 2 ) )
 391                 {
 392                     i_align |= VOUT_ALIGN_TOP;
 393                     i_height -= i_vstart_rounded ? 2: 0;
 394                 }
 395                 else
 396                 {
 397                     i_align |= VOUT_ALIGN_BOTTOM;
 398                 }
 399             }
 400             if( i_height == 0 || i_width == 0 )
 401             {
 402                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active = VLC_FALSE;
 403             }
 404
 405             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 406             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 407             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_left = i_left;
 408             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_top = i_top;
 409             i_left += i_width;
 410
 411             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 412             {
 413                 p_vout->p_sys->i_vout++;
 414                 continue;
 415             }
 416             var_SetInteger( p_vout, "align", i_align );
 417             var_SetInteger( p_vout, "video-x", i_left + i_xpos - i_width);
 418             var_SetInteger( p_vout, "video-y", i_top + i_ypos );
 419
 420             fmt.i_width = fmt.i_visible_width = i_width;
 421             fmt.i_height = fmt.i_visible_height = i_height;
 422             fmt.i_aspect = i_aspect * i_target_height / i_height *
 423                 i_width / i_target_width;
 424
 425             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 426                 vout_Create( p_vout, &fmt );
 427             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout )
 428             {
 429                 msg_Err( p_vout, "failed to get %ix%i vout threads",
 430                                  p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 431                 RemoveAllVout( p_vout );
 432                 return VLC_EGENERIC;
 433             }
 434             ADD_CALLBACKS(
 435                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 436                 SendEvents );
 437             p_vout->p_sys->i_vout++;
 438         }
 439     }
 440
 441     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 442
 443     ADD_PARENT_CALLBACKS( SendEventsToChild );
 444
 445     return VLC_SUCCESS;
 446 }
 447
 448 /*****************************************************************************
 449  * End: terminate Wall video thread output method
 450  *****************************************************************************/
 451 static void End( vout_thread_t *p_vout )
 452 {
 453     int i_index;
 454
 455     /* Free the fake output buffers we allocated */
 456     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 457     {
 458         i_index--;
 459         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 460     }
 461 }
 462
 463 /*****************************************************************************
 464  * Destroy: destroy Wall video thread output method
 465  *****************************************************************************
 466  * Terminate an output method created by WallCreateOutputMethod
 467  *****************************************************************************/
 468 static void Destroy( vlc_object_t *p_this )
 469 {
 470     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 471
 472     RemoveAllVout( p_vout );
 473
 474     DEL_PARENT_CALLBACKS( SendEventsToChild );
 475
 476     free( p_vout->p_sys->pp_vout );
 477     free( p_vout->p_sys );
 478 }
 479
 480 /*****************************************************************************
 481  * Render: displays previously rendered output
 482  *****************************************************************************
 483  * This function send the currently rendered image to Wall image, waits
 484  * until it is displayed and switch the two rendering buffers, preparing next
 485  * frame.
 486  *****************************************************************************/
 487 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 488 {
 489     picture_t *p_outpic = NULL;
 490     int i_col, i_row, i_vout, i_plane;
 491     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 492
 493     i_vout = 0;
 494
 495     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 496     {
 497         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 498         {
 499             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 500             {
 501                 pi_left_skip[i_plane] = p_vout->p_sys->pp_vout[ i_vout ].i_left * p_pic->p[ i_plane ].i_pitch / p_vout->output.i_width;
 502                 pi_top_skip[i_plane] = (p_vout->p_sys->pp_vout[ i_vout ].i_top * p_pic->p[ i_plane ].i_lines / p_vout->output.i_height)*p_pic->p[i_plane].i_pitch;
 503             }
 504
 505             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 506             {
 507                 i_vout++;
 508                 continue;
 509             }
 510
 511             while( ( p_outpic =
 512                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 513                                     0, 0, 0 )
 514                    ) == NULL )
 515             {
 516                 if( p_vout->b_die || p_vout->b_error )
 517                 {
 518                     vout_DestroyPicture(
 519                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 520                     return;
 521                 }
 522
 523                 msleep( VOUT_OUTMEM_SLEEP );
 524             }
 525
 526             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 527                               p_outpic, p_pic->date );
 528             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 529                               p_outpic );
 530
 531             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 532             {
 533                 uint8_t *p_in, *p_in_end, *p_out;
 534                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 535                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 536                 int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 537
 538                 p_in = p_pic->p[i_plane].p_pixels
 539                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 540
 541                 p_in_end = p_in + p_outpic->p[i_plane].i_visible_lines
 542                                    * p_pic->p[i_plane].i_pitch;
 543
 544                 p_out = p_outpic->p[i_plane].p_pixels;
 545
 546                 while( p_in < p_in_end )
 547                 {
 548                     p_vout->p_libvlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 549                     p_in += i_in_pitch;
 550                     p_out += i_out_pitch;
 551                 }
 552
 553 //                pi_left_skip[i_plane] += i_copy_pitch;
 554             }
 555
 556             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 557                                 p_outpic );
 558             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 559                                  p_outpic );
 560
 561             i_vout++;
 562         }
 563
 564 /*         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ ) */
 565 /*         { */
 566 /*             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height */
 567 /*                                      * p_pic->p[i_plane].i_visible_lines */
 568 /*                                      / p_vout->output.i_height */
 569 /*                                      * p_pic->p[i_plane].i_pitch; */
 570 /*         } */
 571     }
 572 }
 573
 574 /*****************************************************************************
 575  * RemoveAllVout: destroy all the child video output threads
 576  *****************************************************************************/
 577 static void RemoveAllVout( vout_thread_t *p_vout )
 578 {
 579     while( p_vout->p_sys->i_vout )
 580     {
 581          --p_vout->p_sys->i_vout;
 582          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 583          {
 584              DEL_CALLBACKS(
 585                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 586                  SendEvents );
 587              vlc_object_detach(
 588                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 589              vout_Destroy(
 590                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 591          }
 592     }
 593 }
 594
 595 /*****************************************************************************
 596  * SendEvents: forward mouse and keyboard events to the parent p_vout
 597  *****************************************************************************/
 598 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 599                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 600 {
 601     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 602     int i_vout;
 603     vlc_value_t sentval = newval;
 604
 605     /* Find the video output index */
 606     for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
 607     {
 608         if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
 609         {
 610             break;
 611         }
 612     }
 613
 614     if( i_vout == p_vout->p_sys->i_vout )
 615     {
 616         return VLC_EGENERIC;
 617     }
 618
 619     /* Translate the mouse coordinates */
 620     if( !strcmp( psz_var, "mouse-x" ) )
 621     {
 622         sentval.i_int += p_vout->output.i_width
 623                           * (i_vout % p_vout->p_sys->i_col)
 624                           / p_vout->p_sys->i_col;
 625     }
 626     else if( !strcmp( psz_var, "mouse-y" ) )
 627     {
 628         sentval.i_int += p_vout->output.i_height
 629                           * (i_vout / p_vout->p_sys->i_row)
 630                           / p_vout->p_sys->i_row;
 631     }
 632
 633     var_Set( p_vout, psz_var, sentval );
 634
 635     return VLC_SUCCESS;
 636 }
 637
 638 /*****************************************************************************
 639  * SendEventsToChild: forward events to the child/children vout
 640  *****************************************************************************/
 641 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 642                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 643 {
 644     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 645     int i_row, i_col, i_vout = 0;
 646
 647     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 648     {
 649         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 650         {
 651             var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
 652             if( !strcmp( psz_var, "fullscreen" ) ) break;
 653             i_vout++;
 654         }
 655     }
 656
 657     return VLC_SUCCESS;
 658 }