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
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_vout.h>
  35
  36 #include "filter_common.h"
  37
  38 /*****************************************************************************
  39  * Local prototypes
  40  *****************************************************************************/
  41 static int  Create    ( vlc_object_t * );
  42 static void Destroy   ( vlc_object_t * );
  43
  44 static int  Init      ( vout_thread_t * );
  45 static void End       ( vout_thread_t * );
  46 static void Render    ( vout_thread_t *, picture_t * );
  47
  48 static void RemoveAllVout  ( vout_thread_t *p_vout );
  49
  50 static int  SendEvents( vlc_object_t *, char const *,
  51                         vlc_value_t, vlc_value_t, void * );
  52
  53 /*****************************************************************************
  54  * Module descriptor
  55  *****************************************************************************/
  56 #define COLS_TEXT N_("Number of columns")
  57 #define COLS_LONGTEXT N_("Number of horizontal windows in " \
  58     "which to split the video.")
  59
  60 #define ROWS_TEXT N_("Number of rows")
  61 #define ROWS_LONGTEXT N_("Number of vertical windows in " \
  62     "which to split the video.")
  63
  64 #define ACTIVE_TEXT N_("Active windows")
  65 #define ACTIVE_LONGTEXT N_("Comma-separated list of active windows, " \
  66     "defaults to all")
  67
  68 #define ASPECT_TEXT N_("Element aspect ratio")
  69 #define ASPECT_LONGTEXT N_("Aspect ratio of the individual displays " \
  70    "building the wall.")
  71
  72 #define CFG_PREFIX "wall-"
  73
  74 vlc_module_begin();
  75     set_description( N_("Wall video filter") );
  76     set_shortname( N_("Image wall" ));
  77     set_capability( "video filter", 0 );
  78     set_category( CAT_VIDEO );
  79     set_subcategory( SUBCAT_VIDEO_VFILTER );
  80
  81     add_integer( CFG_PREFIX "cols", 3, NULL, COLS_TEXT, COLS_LONGTEXT, false );
  82     add_integer( CFG_PREFIX "rows", 3, NULL, ROWS_TEXT, ROWS_LONGTEXT, false );
  83     add_string( CFG_PREFIX "active", NULL, NULL, ACTIVE_TEXT, ACTIVE_LONGTEXT,
  84                  true );
  85     add_string( CFG_PREFIX "element-aspect", "4:3", NULL, ASPECT_TEXT, ASPECT_LONGTEXT, false );
  86
  87     add_shortcut( "wall" );
  88     set_callbacks( Create, Destroy );
  89 vlc_module_end();
  90
  91 static const char *const ppsz_filter_options[] = {
  92     "cols", "rows", "active", "element-aspect", NULL
  93 };
  94
  95 /*****************************************************************************
  96  * vout_sys_t: Wall video output method descriptor
  97  *****************************************************************************
  98  * This structure is part of the video output thread descriptor.
  99  * It describes the Wall specific properties of an output thread.
 100  *****************************************************************************/
 101 struct vout_sys_t
 102 {
 103     int    i_col;
 104     int    i_row;
 105     int    i_vout;
 106     struct vout_list_t
 107     {
 108         bool b_active;
 109         int i_width;
 110         int i_height;
 111         int i_left;
 112         int i_top;
 113         vout_thread_t *p_vout;
 114     } *pp_vout;
 115 };
 116
 117 /*****************************************************************************
 118  * Control: control facility for the vout (forwards to child vout)
 119  *****************************************************************************/
 120 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 121 {
 122     int i_row, i_col, i_vout = 0;
 123
 124     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 125     {
 126         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 127         {
 128             vout_vaControl( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 129                             i_query, args );
 130             i_vout++;
 131         }
 132     }
 133     return VLC_SUCCESS;
 134 }
 135
 136 /*****************************************************************************
 137  * Create: allocates Wall video thread output method
 138  *****************************************************************************
 139  * This function allocates and initializes a Wall vout method.
 140  *****************************************************************************/
 141 static int Create( vlc_object_t *p_this )
 142 {
 143     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 144     char *psz_method, *psz_tmp, *psz_method_tmp;
 145     int i_vout;
 146
 147     /* Allocate structure */
 148     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 149     if( p_vout->p_sys == NULL )
 150     {
 151         msg_Err( p_vout, "out of memory" );
 152         return VLC_ENOMEM;
 153     }
 154
 155     p_vout->pf_init = Init;
 156     p_vout->pf_end = End;
 157     p_vout->pf_manage = NULL;
 158     p_vout->pf_render = Render;
 159     p_vout->pf_display = NULL;
 160     p_vout->pf_control = Control;
 161
 162     config_ChainParse( p_vout, CFG_PREFIX, ppsz_filter_options,
 163                        p_vout->p_cfg );
 164
 165     /* Look what method was requested */
 166     p_vout->p_sys->i_col = var_CreateGetInteger( p_vout, CFG_PREFIX "cols" );
 167     p_vout->p_sys->i_row = var_CreateGetInteger( p_vout, CFG_PREFIX "rows" );
 168
 169     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 170     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 171
 172     msg_Dbg( p_vout, "opening a %i x %i wall",
 173              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 174
 175     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 176                                      p_vout->p_sys->i_col *
 177                                      sizeof(struct vout_list_t) );
 178     if( p_vout->p_sys->pp_vout == NULL )
 179     {
 180         msg_Err( p_vout, "out of memory" );
 181         free( p_vout->p_sys );
 182         return VLC_ENOMEM;
 183     }
 184
 185     psz_method_tmp =
 186     psz_method = var_CreateGetNonEmptyString( p_vout, CFG_PREFIX "active" );
 187
 188     /* If no trailing vout are specified, take them all */
 189     if( psz_method == NULL )
 190     {
 191         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 192              i_vout--; )
 193         {
 194             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 195         }
 196     }
 197     /* If trailing vout are specified, activate only the requested ones */
 198     else
 199     {
 200         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 201              i_vout--; )
 202         {
 203             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 204         }
 205
 206         while( *psz_method )
 207         {
 208             psz_tmp = psz_method;
 209             while( *psz_tmp && *psz_tmp != ',' )
 210             {
 211                 psz_tmp++;
 212             }
 213
 214             if( *psz_tmp )
 215             {
 216                 *psz_tmp = '\0';
 217                 i_vout = atoi( psz_method );
 218                 psz_method = psz_tmp + 1;
 219             }
 220             else
 221             {
 222                 i_vout = atoi( psz_method );
 223                 psz_method = psz_tmp;
 224             }
 225
 226             if( i_vout >= 0 &&
 227                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 228             {
 229                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 230             }
 231         }
 232     }
 233
 234     free( psz_method_tmp );
 235
 236     return VLC_SUCCESS;
 237 }
 238
 239 /*****************************************************************************
 240  * Init: initialize Wall video thread output method
 241  *****************************************************************************/
 242 static int Init( vout_thread_t *p_vout )
 243 {
 244     int i_index, i_row, i_col, i_width, i_height, i_left, i_top;
 245     unsigned int i_target_width,i_target_height;
 246     picture_t *p_pic;
 247     video_format_t fmt;
 248     int i_aspect = 4*VOUT_ASPECT_FACTOR/3;
 249     int i_align = 0;
 250     unsigned int i_hstart, i_hend, i_vstart, i_vend;
 251     unsigned int w1,h1,w2,h2;
 252     int i_xpos, i_ypos;
 253     int i_vstart_rounded = 0, i_hstart_rounded = 0;
 254     char *psz_aspect;
 255
 256     memset( &fmt, 0, sizeof(video_format_t) );
 257
 258     psz_aspect = var_CreateGetNonEmptyString( p_vout,
 259                                               CFG_PREFIX "element-aspect" );
 260     if( psz_aspect && *psz_aspect )
 261     {
 262         char *psz_parser = strchr( psz_aspect, ':' );
 263         if( psz_parser )
 264         {
 265             *psz_parser++ = '\0';
 266             i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR
 267                 / atoi( psz_parser );
 268         }
 269         else
 270         {
 271             msg_Warn( p_vout, "invalid aspect ratio specification" );
 272         }
 273         free( psz_aspect );
 274     }
 275
 276     i_xpos = var_CreateGetInteger( p_vout, "video-x" );
 277     i_ypos = var_CreateGetInteger( p_vout, "video-y" );
 278     if( i_xpos < 0 ) i_xpos = 0;
 279     if( i_ypos < 0 ) i_ypos = 0;
 280
 281     I_OUTPUTPICTURES = 0;
 282
 283     /* Initialize the output structure */
 284     p_vout->output.i_chroma = p_vout->render.i_chroma;
 285     p_vout->output.i_width  = p_vout->render.i_width;
 286     p_vout->output.i_height = p_vout->render.i_height;
 287     p_vout->output.i_aspect = p_vout->render.i_aspect;
 288     var_Create( p_vout, "align", VLC_VAR_INTEGER );
 289
 290     fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
 291     fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
 292     fmt.i_x_offset = fmt.i_y_offset = 0;
 293     fmt.i_chroma = p_vout->render.i_chroma;
 294     fmt.i_aspect = p_vout->render.i_aspect;
 295     fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
 296     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 297
 298     w1 = p_vout->output.i_width / p_vout->p_sys->i_col;
 299     w1 &= ~1;
 300     h1 = w1 * VOUT_ASPECT_FACTOR / i_aspect&~1;
 301     h1 &= ~1;
 302
 303     h2 = p_vout->output.i_height / p_vout->p_sys->i_row&~1;
 304     h2 &= ~1;
 305     w2 = h2 * i_aspect / VOUT_ASPECT_FACTOR&~1;
 306     w2 &= ~1;
 307
 308     if ( h1 * p_vout->p_sys->i_row < p_vout->output.i_height )
 309     {
 310         unsigned int i_tmp;
 311         i_target_width = w2;
 312         i_target_height = h2;
 313         i_vstart = 0;
 314         i_vend = p_vout->output.i_height;
 315         i_tmp = i_target_width * p_vout->p_sys->i_col;
 316         while( i_tmp < p_vout->output.i_width ) i_tmp += p_vout->p_sys->i_col;
 317         i_hstart = (( i_tmp - p_vout->output.i_width ) / 2)&~1;
 318         i_hstart_rounded  = ( ( i_tmp - p_vout->output.i_width ) % 2 ) ||
 319             ( ( ( i_tmp - p_vout->output.i_width ) / 2 ) & 1 );
 320         i_hend = i_hstart + p_vout->output.i_width;
 321     }
 322     else
 323     {
 324         unsigned int i_tmp;
 325         i_target_height = h1;
 326         i_target_width = w1;
 327         i_hstart = 0;
 328         i_hend = p_vout->output.i_width;
 329         i_tmp = i_target_height * p_vout->p_sys->i_row;
 330         while( i_tmp < p_vout->output.i_height ) i_tmp += p_vout->p_sys->i_row;
 331         i_vstart = ( ( i_tmp - p_vout->output.i_height ) / 2 ) & ~1;
 332         i_vstart_rounded  = ( ( i_tmp - p_vout->output.i_height ) % 2 ) ||
 333             ( ( ( i_tmp - p_vout->output.i_height ) / 2 ) & 1 );
 334         i_vend = i_vstart + p_vout->output.i_height;
 335     }
 336     msg_Dbg( p_vout, "target resolution %dx%d", i_target_width, i_target_height );
 337
 338     /* Try to open the real video output */
 339     msg_Dbg( p_vout, "spawning the real video outputs" );
 340
 341     p_vout->p_sys->i_vout = 0;
 342     msg_Dbg( p_vout, "target window (%d,%d)-(%d,%d)", i_hstart,i_vstart,i_hend,i_vend );
 343
 344
 345     i_top = 0;
 346     i_height = 0;
 347     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 348     {
 349         i_left = 0;
 350         i_top += i_height;
 351         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 352         {
 353             i_align = 0;
 354
 355             if( i_col*i_target_width >= i_hstart &&
 356                 (i_col+1)*i_target_width <= i_hend )
 357             {
 358                 i_width = i_target_width;
 359             }
 360             else if( ( i_col + 1 ) * i_target_width < i_hstart ||
 361                      ( i_col * i_target_width ) > i_hend )
 362             {
 363                 i_width = 0;
 364             }
 365             else
 366             {
 367                 i_width = ( i_target_width - i_hstart % i_target_width );
 368                 if( i_col >= ( p_vout->p_sys->i_col / 2 ) )
 369                 {
 370                     i_align |= VOUT_ALIGN_LEFT;
 371                     i_width -= i_hstart_rounded ? 2: 0;
 372                 }
 373                 else
 374                 {
 375                     i_align |= VOUT_ALIGN_RIGHT;
 376                 }
 377             }
 378
 379             if( i_row * i_target_height >= i_vstart &&
 380                 ( i_row + 1 ) * i_target_height <= i_vend )
 381             {
 382                 i_height = i_target_height;
 383             }
 384             else if( ( i_row + 1 ) * i_target_height < i_vstart ||
 385                      ( i_row * i_target_height ) > i_vend )
 386             {
 387                 i_height = 0;
 388             }
 389             else
 390             {
 391                 i_height = ( i_target_height -
 392                              i_vstart%i_target_height );
 393                 if(  i_row >= ( p_vout->p_sys->i_row / 2 ) )
 394                 {
 395                     i_align |= VOUT_ALIGN_TOP;
 396                     i_height -= i_vstart_rounded ? 2: 0;
 397                 }
 398                 else
 399                 {
 400                     i_align |= VOUT_ALIGN_BOTTOM;
 401                 }
 402             }
 403             if( i_height == 0 || i_width == 0 )
 404             {
 405                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active = false;
 406             }
 407
 408             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 409             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 410             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_left = i_left;
 411             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_top = i_top;
 412             i_left += i_width;
 413
 414             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 415             {
 416                 p_vout->p_sys->i_vout++;
 417                 continue;
 418             }
 419             var_SetInteger( p_vout, "align", i_align );
 420             var_SetInteger( p_vout, "video-x", i_left + i_xpos - i_width);
 421             var_SetInteger( p_vout, "video-y", i_top + i_ypos );
 422
 423             fmt.i_width = fmt.i_visible_width = i_width;
 424             fmt.i_height = fmt.i_visible_height = i_height;
 425             fmt.i_aspect = i_aspect * i_target_height / i_height *
 426                 i_width / i_target_width;
 427
 428             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 429                 vout_Create( p_vout, &fmt );
 430             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout )
 431             {
 432                 msg_Err( p_vout, "failed to get %ix%i vout threads",
 433                                  p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 434                 RemoveAllVout( p_vout );
 435                 return VLC_EGENERIC;
 436             }
 437             ADD_CALLBACKS(
 438                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 439                 SendEvents );
 440             p_vout->p_sys->i_vout++;
 441         }
 442     }
 443
 444     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 445
 446     ADD_PARENT_CALLBACKS( SendEventsToChild );
 447
 448     return VLC_SUCCESS;
 449 }
 450
 451 /*****************************************************************************
 452  * End: terminate Wall video thread output method
 453  *****************************************************************************/
 454 static void End( vout_thread_t *p_vout )
 455 {
 456     int i_index;
 457
 458     /* Free the fake output buffers we allocated */
 459     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 460     {
 461         i_index--;
 462         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 463     }
 464 }
 465
 466 /*****************************************************************************
 467  * Destroy: destroy Wall video thread output method
 468  *****************************************************************************
 469  * Terminate an output method created by WallCreateOutputMethod
 470  *****************************************************************************/
 471 static void Destroy( vlc_object_t *p_this )
 472 {
 473     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 474
 475     RemoveAllVout( p_vout );
 476
 477     DEL_PARENT_CALLBACKS( SendEventsToChild );
 478
 479     free( p_vout->p_sys->pp_vout );
 480     free( p_vout->p_sys );
 481 }
 482
 483 /*****************************************************************************
 484  * Render: displays previously rendered output
 485  *****************************************************************************
 486  * This function send the currently rendered image to Wall image, waits
 487  * until it is displayed and switch the two rendering buffers, preparing next
 488  * frame.
 489  *****************************************************************************/
 490 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 491 {
 492     picture_t *p_outpic = NULL;
 493     int i_col, i_row, i_vout, i_plane;
 494     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 495
 496     i_vout = 0;
 497
 498     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 499     {
 500         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 501         {
 502             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 503             {
 504                 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;
 505                 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;
 506             }
 507
 508             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 509             {
 510                 i_vout++;
 511                 continue;
 512             }
 513
 514             while( ( p_outpic =
 515                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 516                                     0, 0, 0 )
 517                    ) == NULL )
 518             {
 519                 if( p_vout->b_die || p_vout->b_error )
 520                 {
 521                     vout_DestroyPicture(
 522                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 523                     return;
 524                 }
 525
 526                 msleep( VOUT_OUTMEM_SLEEP );
 527             }
 528
 529             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 530                               p_outpic, p_pic->date );
 531             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 532                               p_outpic );
 533
 534             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 535             {
 536                 uint8_t *p_in, *p_in_end, *p_out;
 537                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 538                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 539                 int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 540
 541                 p_in = p_pic->p[i_plane].p_pixels
 542                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 543
 544                 p_in_end = p_in + p_outpic->p[i_plane].i_visible_lines
 545                                    * p_pic->p[i_plane].i_pitch;
 546
 547                 p_out = p_outpic->p[i_plane].p_pixels;
 548
 549                 while( p_in < p_in_end )
 550                 {
 551                     vlc_memcpy( p_out, p_in, i_copy_pitch );
 552                     p_in += i_in_pitch;
 553                     p_out += i_out_pitch;
 554                 }
 555
 556 //                pi_left_skip[i_plane] += i_copy_pitch;
 557             }
 558
 559             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 560                                 p_outpic );
 561             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 562                                  p_outpic );
 563
 564             i_vout++;
 565         }
 566
 567 /*         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ ) */
 568 /*         { */
 569 /*             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height */
 570 /*                                      * p_pic->p[i_plane].i_visible_lines */
 571 /*                                      / p_vout->output.i_height */
 572 /*                                      * p_pic->p[i_plane].i_pitch; */
 573 /*         } */
 574     }
 575 }
 576
 577 /*****************************************************************************
 578  * RemoveAllVout: destroy all the child video output threads
 579  *****************************************************************************/
 580 static void RemoveAllVout( vout_thread_t *p_vout )
 581 {
 582     while( p_vout->p_sys->i_vout )
 583     {
 584          --p_vout->p_sys->i_vout;
 585          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 586          {
 587              DEL_CALLBACKS(
 588                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 589                  SendEvents );
 590              vlc_object_detach(
 591                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 592              vlc_object_release(
 593                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 594          }
 595     }
 596 }
 597
 598 /*****************************************************************************
 599  * SendEvents: forward mouse and keyboard events to the parent p_vout
 600  *****************************************************************************/
 601 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 602                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 603 {
 604     VLC_UNUSED(oldval);
 605     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 606     int i_vout;
 607     vlc_value_t sentval = newval;
 608
 609     /* Find the video output index */
 610     for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
 611     {
 612         if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
 613         {
 614             break;
 615         }
 616     }
 617
 618     if( i_vout == p_vout->p_sys->i_vout )
 619     {
 620         return VLC_EGENERIC;
 621     }
 622
 623     /* Translate the mouse coordinates */
 624     if( !strcmp( psz_var, "mouse-x" ) )
 625     {
 626         sentval.i_int += p_vout->output.i_width
 627                           * (i_vout % p_vout->p_sys->i_col)
 628                           / p_vout->p_sys->i_col;
 629     }
 630     else if( !strcmp( psz_var, "mouse-y" ) )
 631     {
 632         sentval.i_int += p_vout->output.i_height
 633                           * (i_vout / p_vout->p_sys->i_row)
 634                           / p_vout->p_sys->i_row;
 635     }
 636
 637     var_Set( p_vout, psz_var, sentval );
 638
 639     return VLC_SUCCESS;
 640 }
 641
 642 /*****************************************************************************
 643  * SendEventsToChild: forward events to the child/children vout
 644  *****************************************************************************/
 645 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 646                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 647 {
 648     VLC_UNUSED(p_data); VLC_UNUSED(oldval);
 649     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 650     int i_row, i_col, i_vout = 0;
 651
 652     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 653     {
 654         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 655         {
 656             var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
 657             if( !strcmp( psz_var, "fullscreen" ) ) break;
 658             i_vout++;
 659         }
 660     }
 661
 662     return VLC_SUCCESS;
 663 }