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