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 VideoLAN (Centrale Réseaux) and its contributors
   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., 59 Temple Place - Suite 330, Boston, MA  02111, 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_("Select the number of horizontal video windows in " \
  55     "which to split the video.")
  56
  57 #define ROWS_TEXT N_("Number of rows")
  58 #define ROWS_LONGTEXT N_("Select the number of vertical video 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_("The aspect ratio of the individual displays building the display wall")
  67
  68 vlc_module_begin();
  69     set_description( _("Wall video filter") );
  70     set_shortname( N_("Image wall" ));
  71     set_capability( "video filter", 0 );
  72     set_category( CAT_VIDEO );
  73     set_subcategory( SUBCAT_VIDEO_VFILTER );
  74
  75     add_integer( "wall-cols", 3, NULL, COLS_TEXT, COLS_LONGTEXT, VLC_FALSE );
  76     add_integer( "wall-rows", 3, NULL, ROWS_TEXT, ROWS_LONGTEXT, VLC_FALSE );
  77     add_string( "wall-active", NULL, NULL, ACTIVE_TEXT, ACTIVE_LONGTEXT, VLC_FALSE );
  78     add_string( "wall-element-aspect", "4:3", NULL, ASPECT_TEXT, ASPECT_LONGTEXT, VLC_FALSE );
  79
  80     add_shortcut( "wall" );
  81     set_callbacks( Create, Destroy );
  82 vlc_module_end();
  83
  84 /*****************************************************************************
  85  * vout_sys_t: Wall video output method descriptor
  86  *****************************************************************************
  87  * This structure is part of the video output thread descriptor.
  88  * It describes the Wall specific properties of an output thread.
  89  *****************************************************************************/
  90 struct vout_sys_t
  91 {
  92     int    i_col;
  93     int    i_row;
  94     int    i_vout;
  95     struct vout_list_t
  96     {
  97         vlc_bool_t b_active;
  98         int i_width;
  99         int i_height;
 100         int i_left;
 101         int i_top;
 102         vout_thread_t *p_vout;
 103     } *pp_vout;
 104 };
 105
 106 /*****************************************************************************
 107  * Control: control facility for the vout (forwards to child vout)
 108  *****************************************************************************/
 109 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 110 {
 111     int i_row, i_col, i_vout = 0;
 112
 113     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 114     {
 115         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 116         {
 117             vout_vaControl( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 118                             i_query, args );
 119             i_vout++;
 120         }
 121     }
 122     return VLC_SUCCESS;
 123 }
 124
 125 /*****************************************************************************
 126  * Create: allocates Wall video thread output method
 127  *****************************************************************************
 128  * This function allocates and initializes a Wall vout method.
 129  *****************************************************************************/
 130 static int Create( vlc_object_t *p_this )
 131 {
 132     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 133     char *psz_method, *psz_tmp, *psz_method_tmp;
 134     int i_vout;
 135
 136     /* Allocate structure */
 137     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 138     if( p_vout->p_sys == NULL )
 139     {
 140         msg_Err( p_vout, "out of memory" );
 141         return VLC_ENOMEM;
 142     }
 143
 144     p_vout->pf_init = Init;
 145     p_vout->pf_end = End;
 146     p_vout->pf_manage = NULL;
 147     p_vout->pf_render = Render;
 148     p_vout->pf_display = NULL;
 149     p_vout->pf_control = Control;
 150
 151     /* Look what method was requested */
 152     p_vout->p_sys->i_col = config_GetInt( p_vout, "wall-cols" );
 153     p_vout->p_sys->i_row = config_GetInt( p_vout, "wall-rows" );
 154
 155     p_vout->p_sys->i_col = __MAX( 1, __MIN( 15, p_vout->p_sys->i_col ) );
 156     p_vout->p_sys->i_row = __MAX( 1, __MIN( 15, p_vout->p_sys->i_row ) );
 157
 158     msg_Dbg( p_vout, "opening a %i x %i wall",
 159              p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 160
 161     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_row *
 162                                      p_vout->p_sys->i_col *
 163                                      sizeof(struct vout_list_t) );
 164     if( p_vout->p_sys->pp_vout == NULL )
 165     {
 166         msg_Err( p_vout, "out of memory" );
 167         free( p_vout->p_sys );
 168         return VLC_ENOMEM;
 169     }
 170
 171     psz_method_tmp = psz_method = config_GetPsz( p_vout, "wall-active" );
 172
 173     /* If no trailing vout are specified, take them all */
 174     if( psz_method == NULL )
 175     {
 176         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 177              i_vout--; )
 178         {
 179             p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 180         }
 181     }
 182     /* If trailing vout are specified, activate only the requested ones */
 183     else
 184     {
 185         for( i_vout = p_vout->p_sys->i_row * p_vout->p_sys->i_col;
 186              i_vout--; )
 187         {
 188             p_vout->p_sys->pp_vout[i_vout].b_active = 0;
 189         }
 190
 191         while( *psz_method )
 192         {
 193             psz_tmp = psz_method;
 194             while( *psz_tmp && *psz_tmp != ',' )
 195             {
 196                 psz_tmp++;
 197             }
 198
 199             if( *psz_tmp )
 200             {
 201                 *psz_tmp = '\0';
 202                 i_vout = atoi( psz_method );
 203                 psz_method = psz_tmp + 1;
 204             }
 205             else
 206             {
 207                 i_vout = atoi( psz_method );
 208                 psz_method = psz_tmp;
 209             }
 210
 211             if( i_vout >= 0 &&
 212                 i_vout < p_vout->p_sys->i_row * p_vout->p_sys->i_col )
 213             {
 214                 p_vout->p_sys->pp_vout[i_vout].b_active = 1;
 215             }
 216         }
 217     }
 218
 219     free( psz_method_tmp );
 220
 221     return VLC_SUCCESS;
 222 }
 223
 224 /*****************************************************************************
 225  * Init: initialize Wall video thread output method
 226  *****************************************************************************/
 227 static int Init( vout_thread_t *p_vout )
 228 {
 229     int i_index, i_row, i_col, i_width, i_height, i_left, i_top;
 230     unsigned int i_target_width,i_target_height;
 231     picture_t *p_pic;
 232     video_format_t fmt = {0};
 233     int i_aspect = 4*VOUT_ASPECT_FACTOR/3;
 234     int i_align = 0;
 235     unsigned int i_hstart, i_hend, i_vstart, i_vend;
 236     unsigned int w1,h1,w2,h2;
 237     int i_xpos, i_ypos;
 238     int i_vstart_rounded = 0, i_hstart_rounded = 0;
 239     char *psz_aspect;
 240
 241     psz_aspect = config_GetPsz( p_vout, "wall-element-aspect" );
 242     if( psz_aspect && *psz_aspect )
 243     {
 244         char *psz_parser = strchr( psz_aspect, ':' );
 245         if( psz_parser )
 246         {
 247             *psz_parser++ = '\0';
 248             i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR
 249                 / atoi( psz_parser );
 250         }
 251         else
 252         {
 253             msg_Warn( p_vout, "invalid aspect ratio specification" );
 254         }
 255         free( psz_aspect );
 256     }
 257
 258
 259     i_xpos = var_CreateGetInteger( p_vout, "video-x" );
 260     i_ypos = var_CreateGetInteger( p_vout, "video-y" );
 261     if( i_xpos < 0 ) i_xpos = 0;
 262     if( i_ypos < 0 ) i_ypos = 0;
 263
 264     I_OUTPUTPICTURES = 0;
 265
 266     /* Initialize the output structure */
 267     p_vout->output.i_chroma = p_vout->render.i_chroma;
 268     p_vout->output.i_width  = p_vout->render.i_width;
 269     p_vout->output.i_height = p_vout->render.i_height;
 270     p_vout->output.i_aspect = p_vout->render.i_aspect;
 271     var_Create( p_vout, "align", VLC_VAR_INTEGER );
 272
 273     fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
 274     fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
 275     fmt.i_x_offset = fmt.i_y_offset = 0;
 276     fmt.i_chroma = p_vout->render.i_chroma;
 277     fmt.i_aspect = p_vout->render.i_aspect;
 278     fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
 279     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 280
 281     w1 = p_vout->output.i_width / p_vout->p_sys->i_col;
 282     w1 &= ~1;
 283     h1 = w1 * VOUT_ASPECT_FACTOR / i_aspect&~1;
 284     h1 &= ~1;
 285
 286     h2 = p_vout->output.i_height / p_vout->p_sys->i_row&~1;
 287     h2 &= ~1;
 288     w2 = h2 * i_aspect / VOUT_ASPECT_FACTOR&~1;
 289     w2 &= ~1;
 290
 291     if ( h1 * p_vout->p_sys->i_row < p_vout->output.i_height )
 292     {
 293         unsigned int i_tmp;
 294         i_target_width = w2;
 295         i_target_height = h2;
 296         i_vstart = 0;
 297         i_vend = p_vout->output.i_height;
 298         i_tmp = i_target_width * p_vout->p_sys->i_col;
 299         while( i_tmp < p_vout->output.i_width ) i_tmp += p_vout->p_sys->i_col;
 300         i_hstart = (( i_tmp - p_vout->output.i_width ) / 2)&~1;
 301         i_hstart_rounded  = ( ( i_tmp - p_vout->output.i_width ) % 2 ) ||
 302             ( ( ( i_tmp - p_vout->output.i_width ) / 2 ) & 1 );
 303         i_hend = i_hstart + p_vout->output.i_width;
 304     }
 305     else
 306     {
 307         unsigned int i_tmp;
 308         i_target_height = h1;
 309         i_target_width = w1;
 310         i_hstart = 0;
 311         i_hend = p_vout->output.i_width;
 312         i_tmp = i_target_height * p_vout->p_sys->i_row;
 313         while( i_tmp < p_vout->output.i_height ) i_tmp += p_vout->p_sys->i_row;
 314         i_vstart = ( ( i_tmp - p_vout->output.i_height ) / 2 ) & ~1;
 315         i_vstart_rounded  = ( ( i_tmp - p_vout->output.i_height ) % 2 ) ||
 316             ( ( ( i_tmp - p_vout->output.i_height ) / 2 ) & 1 );
 317         i_vend = i_vstart + p_vout->output.i_height;
 318     }
 319     msg_Dbg( p_vout, "target resolution %dx%d", i_target_width, i_target_height );
 320
 321     /* Try to open the real video output */
 322     msg_Dbg( p_vout, "spawning the real video outputs" );
 323
 324     p_vout->p_sys->i_vout = 0;
 325     msg_Dbg( p_vout, "target window (%d,%d)-(%d,%d)", i_hstart,i_vstart,i_hend,i_vend );
 326
 327
 328     i_top = 0;
 329     i_height = 0;
 330     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 331     {
 332         i_left = 0;
 333         i_top += i_height;
 334         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 335         {
 336             i_align = 0;
 337
 338             if( i_col*i_target_width >= i_hstart &&
 339                 (i_col+1)*i_target_width <= i_hend )
 340             {
 341                 i_width = i_target_width;
 342             }
 343             else if( ( i_col + 1 ) * i_target_width < i_hstart ||
 344                      ( i_col * i_target_width ) > i_hend )
 345             {
 346                 i_width = 0;
 347             }
 348             else
 349             {
 350                 i_width = ( i_target_width - i_hstart % i_target_width );
 351                 if( i_col >= ( p_vout->p_sys->i_col / 2 ) )
 352                 {
 353                     i_align |= VOUT_ALIGN_LEFT;
 354                     i_width -= i_hstart_rounded ? 2: 0;
 355                 }
 356                 else
 357                 {
 358                     i_align |= VOUT_ALIGN_RIGHT;
 359                 }
 360             }
 361
 362             if( i_row * i_target_height >= i_vstart &&
 363                 ( i_row + 1 ) * i_target_height <= i_vend )
 364             {
 365                 i_height = i_target_height;
 366             }
 367             else if( ( i_row + 1 ) * i_target_height < i_vstart ||
 368                      ( i_row * i_target_height ) > i_vend )
 369             {
 370                 i_height = 0;
 371             }
 372             else
 373             {
 374                 i_height = ( i_target_height -
 375                              i_vstart%i_target_height );
 376                 if(  i_row >= ( p_vout->p_sys->i_row / 2 ) )
 377                 {
 378                     i_align |= VOUT_ALIGN_TOP;
 379                     i_height -= i_vstart_rounded ? 2: 0;
 380                 }
 381                 else
 382                 {
 383                     i_align |= VOUT_ALIGN_BOTTOM;
 384                 }
 385             }
 386             if( i_height == 0 || i_width == 0 )
 387             {
 388                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active = VLC_FALSE;
 389             }
 390
 391             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
 392             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
 393             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_left = i_left;
 394             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_top = i_top;
 395             i_left += i_width;
 396
 397             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 398             {
 399                 p_vout->p_sys->i_vout++;
 400                 continue;
 401             }
 402             var_SetInteger( p_vout, "align", i_align );
 403             var_SetInteger( p_vout, "video-x", i_left + i_xpos - i_width);
 404             var_SetInteger( p_vout, "video-y", i_top + i_ypos );
 405
 406             fmt.i_width = fmt.i_visible_width = i_width;
 407             fmt.i_height = fmt.i_visible_height = i_height;
 408             fmt.i_aspect = i_aspect * i_target_height / i_height *
 409                 i_width / i_target_width;
 410
 411             p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
 412                 vout_Create( p_vout, &fmt );
 413             if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout )
 414             {
 415                 msg_Err( p_vout, "failed to get %ix%i vout threads",
 416                                  p_vout->p_sys->i_col, p_vout->p_sys->i_row );
 417                 RemoveAllVout( p_vout );
 418                 return VLC_EGENERIC;
 419             }
 420             ADD_CALLBACKS(
 421                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 422                 SendEvents );
 423             p_vout->p_sys->i_vout++;
 424         }
 425     }
 426
 427     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 428
 429     ADD_PARENT_CALLBACKS( SendEventsToChild );
 430
 431     return VLC_SUCCESS;
 432 }
 433
 434 /*****************************************************************************
 435  * End: terminate Wall video thread output method
 436  *****************************************************************************/
 437 static void End( vout_thread_t *p_vout )
 438 {
 439     int i_index;
 440
 441     /* Free the fake output buffers we allocated */
 442     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 443     {
 444         i_index--;
 445         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 446     }
 447 }
 448
 449 /*****************************************************************************
 450  * Destroy: destroy Wall video thread output method
 451  *****************************************************************************
 452  * Terminate an output method created by WallCreateOutputMethod
 453  *****************************************************************************/
 454 static void Destroy( vlc_object_t *p_this )
 455 {
 456     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 457
 458     RemoveAllVout( p_vout );
 459
 460     DEL_PARENT_CALLBACKS( SendEventsToChild );
 461
 462     free( p_vout->p_sys->pp_vout );
 463     free( p_vout->p_sys );
 464 }
 465
 466 /*****************************************************************************
 467  * Render: displays previously rendered output
 468  *****************************************************************************
 469  * This function send the currently rendered image to Wall image, waits
 470  * until it is displayed and switch the two rendering buffers, preparing next
 471  * frame.
 472  *****************************************************************************/
 473 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 474 {
 475     picture_t *p_outpic = NULL;
 476     int i_col, i_row, i_vout, i_plane;
 477     int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];
 478
 479     i_vout = 0;
 480
 481     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 482     {
 483         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 484         {
 485             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 486             {
 487                 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;
 488                 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;
 489             }
 490
 491             if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
 492             {
 493                 i_vout++;
 494                 continue;
 495             }
 496
 497             while( ( p_outpic =
 498                 vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 499                                     0, 0, 0 )
 500                    ) == NULL )
 501             {
 502                 if( p_vout->b_die || p_vout->b_error )
 503                 {
 504                     vout_DestroyPicture(
 505                         p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
 506                     return;
 507                 }
 508
 509                 msleep( VOUT_OUTMEM_SLEEP );
 510             }
 511
 512             vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 513                               p_outpic, p_pic->date );
 514             vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 515                               p_outpic );
 516
 517             for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 518             {
 519                 uint8_t *p_in, *p_in_end, *p_out;
 520                 int i_in_pitch = p_pic->p[i_plane].i_pitch;
 521                 int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 522                 int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 523
 524                 p_in = p_pic->p[i_plane].p_pixels
 525                         + pi_top_skip[i_plane] + pi_left_skip[i_plane];
 526
 527                 p_in_end = p_in + p_outpic->p[i_plane].i_visible_lines
 528                                    * p_pic->p[i_plane].i_pitch;
 529
 530                 p_out = p_outpic->p[i_plane].p_pixels;
 531
 532                 while( p_in < p_in_end )
 533                 {
 534                     p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 535                     p_in += i_in_pitch;
 536                     p_out += i_out_pitch;
 537                 }
 538
 539 //                pi_left_skip[i_plane] += i_copy_pitch;
 540             }
 541
 542             vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 543                                 p_outpic );
 544             vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
 545                                  p_outpic );
 546
 547             i_vout++;
 548         }
 549
 550 /*         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ ) */
 551 /*         { */
 552 /*             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height */
 553 /*                                      * p_pic->p[i_plane].i_visible_lines */
 554 /*                                      / p_vout->output.i_height */
 555 /*                                      * p_pic->p[i_plane].i_pitch; */
 556 /*         } */
 557     }
 558 }
 559
 560 /*****************************************************************************
 561  * RemoveAllVout: destroy all the child video output threads
 562  *****************************************************************************/
 563 static void RemoveAllVout( vout_thread_t *p_vout )
 564 {
 565     while( p_vout->p_sys->i_vout )
 566     {
 567          --p_vout->p_sys->i_vout;
 568          if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
 569          {
 570              DEL_CALLBACKS(
 571                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
 572                  SendEvents );
 573              vlc_object_detach(
 574                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 575              vout_Destroy(
 576                  p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
 577          }
 578     }
 579 }
 580
 581 /*****************************************************************************
 582  * SendEvents: forward mouse and keyboard events to the parent p_vout
 583  *****************************************************************************/
 584 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 585                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 586 {
 587     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 588     int i_vout;
 589     vlc_value_t sentval = newval;
 590
 591     /* Find the video output index */
 592     for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
 593     {
 594         if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
 595         {
 596             break;
 597         }
 598     }
 599
 600     if( i_vout == p_vout->p_sys->i_vout )
 601     {
 602         return VLC_EGENERIC;
 603     }
 604
 605     /* Translate the mouse coordinates */
 606     if( !strcmp( psz_var, "mouse-x" ) )
 607     {
 608         sentval.i_int += p_vout->output.i_width
 609                           * (i_vout % p_vout->p_sys->i_col)
 610                           / p_vout->p_sys->i_col;
 611     }
 612     else if( !strcmp( psz_var, "mouse-y" ) )
 613     {
 614         sentval.i_int += p_vout->output.i_height
 615                           * (i_vout / p_vout->p_sys->i_row)
 616                           / p_vout->p_sys->i_row;
 617     }
 618
 619     var_Set( p_vout, psz_var, sentval );
 620
 621     return VLC_SUCCESS;
 622 }
 623
 624 /*****************************************************************************
 625  * SendEventsToChild: forward events to the child/children vout
 626  *****************************************************************************/
 627 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 628                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 629 {
 630     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 631     int i_row, i_col, i_vout = 0;
 632
 633     for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
 634     {
 635         for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
 636         {
 637             var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
 638             if( !strcmp( psz_var, "fullscreen" ) ) break;
 639             i_vout++;
 640         }
 641     }
 642
 643     return VLC_SUCCESS;
 644 }