git.sesse.net Git - vlc/blob - src/video_output/video_output.c

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  *
   4  * This module describes the programming interface for video output threads.
   5  * It includes functions allowing to open a new thread, send pictures to a
   6  * thread, and destroy a previously oppened video output thread.
   7  *****************************************************************************
   8  * Copyright (C) 2000-2004 VideoLAN
   9  * $Id$
  10  *
  11  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  26  *****************************************************************************/
  27
  28 /*****************************************************************************
  29  * Preamble
  30  *****************************************************************************/
  31 #include <stdlib.h>                                                /* free() */
  32
  33 #include <vlc/vlc.h>
  34
  35 #ifdef HAVE_SYS_TIMES_H
  36 #   include <sys/times.h>
  37 #endif
  38
  39 #include "vlc_video.h"
  40 #include "video_output.h"
  41 #include "vlc_spu.h"
  42 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  43
  44 #if defined( SYS_DARWIN )
  45 #include "darwin_specific.h"
  46 #endif
  47
  48 /*****************************************************************************
  49  * Local prototypes
  50  *****************************************************************************/
  51 static int      InitThread        ( vout_thread_t * );
  52 static void     RunThread         ( vout_thread_t * );
  53 static void     ErrorThread       ( vout_thread_t * );
  54 static void     EndThread         ( vout_thread_t * );
  55 static void     DestroyThread     ( vout_thread_t * );
  56
  57 static void     AspectRatio       ( int, int *, int * );
  58 static int      BinaryLog         ( uint32_t );
  59 static void     MaskToShift       ( int *, int *, uint32_t );
  60 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  61
  62 /* Object variables callbacks */
  63 static int DeinterlaceCallback( vlc_object_t *, char const *,
  64                                 vlc_value_t, vlc_value_t, void * );
  65 static int FilterCallback( vlc_object_t *, char const *,
  66                            vlc_value_t, vlc_value_t, void * );
  67
  68 /*****************************************************************************
  69  * vout_Request: find a video output thread, create one, or destroy one.
  70  *****************************************************************************
  71  * This function looks for a video output thread matching the current
  72  * properties. If not found, it spawns a new one.
  73  *****************************************************************************/
  74 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  75                                  unsigned int i_width, unsigned int i_height,
  76                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  77 {
  78     if( !i_width || !i_height || !i_chroma )
  79     {
  80         /* Reattach video output to input before bailing out */
  81         if( p_vout )
  82         {
  83             vlc_object_t *p_playlist;
  84
  85             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
  86                                           FIND_ANYWHERE );
  87
  88             if( p_playlist )
  89             {
  90                 spu_Attach( p_vout->p_spu, p_this, VLC_FALSE );
  91                 vlc_object_detach( p_vout );
  92                 vlc_object_attach( p_vout, p_playlist );
  93
  94                 vlc_object_release( p_playlist );
  95             }
  96             else
  97             {
  98                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
  99                 vlc_object_detach( p_vout );
 100                 vout_Destroy( p_vout );
 101             }
 102         }
 103         return NULL;
 104     }
 105
 106     /* If a video output was provided, lock it, otherwise look for one. */
 107     if( p_vout )
 108     {
 109         vlc_object_yield( p_vout );
 110     }
 111     else
 112     {
 113         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 114
 115         if( !p_vout )
 116         {
 117             vlc_object_t *p_playlist;
 118
 119             p_playlist = vlc_object_find( p_this,
 120                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 121             if( p_playlist )
 122             {
 123                 p_vout = vlc_object_find( p_playlist,
 124                                           VLC_OBJECT_VOUT, FIND_CHILD );
 125                 /* only first children of p_input for unused vout */
 126                 if( p_vout && p_vout->p_parent != p_playlist )
 127                 {
 128                     vlc_object_release( p_vout );
 129                     p_vout = NULL;
 130                 }
 131                 vlc_object_release( p_playlist );
 132             }
 133         }
 134     }
 135
 136     /* If we now have a video output, check it has the right properties */
 137     if( p_vout )
 138     {
 139         char *psz_filter_chain;
 140         vlc_value_t val;
 141
 142         /* We don't directly check for the "filter" variable for obvious
 143          * performance reasons. */
 144         if( p_vout->b_filter_change )
 145         {
 146             var_Get( p_vout, "filter", &val );
 147             psz_filter_chain = val.psz_string;
 148
 149             if( psz_filter_chain && !*psz_filter_chain )
 150             {
 151                 free( psz_filter_chain );
 152                 psz_filter_chain = NULL;
 153             }
 154             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 155             {
 156                 free( p_vout->psz_filter_chain );
 157                 p_vout->psz_filter_chain = NULL;
 158             }
 159
 160             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 161                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 162                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 163             {
 164                 p_vout->b_filter_change = VLC_FALSE;
 165             }
 166
 167             if( psz_filter_chain ) free( psz_filter_chain );
 168         }
 169
 170         if( ( p_vout->render.i_width != i_width ) ||
 171             ( p_vout->render.i_height != i_height ) ||
 172             ( p_vout->render.i_chroma != i_chroma ) ||
 173             ( p_vout->render.i_aspect != i_aspect
 174                     && !p_vout->b_override_aspect ) ||
 175             p_vout->b_filter_change )
 176         {
 177             /* We are not interested in this format, close this vout */
 178             vlc_object_detach( p_vout );
 179             vlc_object_release( p_vout );
 180             vout_Destroy( p_vout );
 181             p_vout = NULL;
 182         }
 183         else
 184         {
 185             /* This video output is cool! Hijack it. */
 186             vlc_object_detach( p_vout );
 187             spu_Attach( p_vout->p_spu, p_this, VLC_TRUE );
 188             vlc_object_attach( p_vout, p_this );
 189             vlc_object_release( p_vout );
 190         }
 191     }
 192
 193     if( !p_vout )
 194     {
 195         msg_Dbg( p_this, "no usable vout present, spawning one" );
 196
 197         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 198     }
 199
 200     return p_vout;
 201 }
 202
 203 /*****************************************************************************
 204  * vout_Create: creates a new video output thread
 205  *****************************************************************************
 206  * This function creates a new video output thread, and returns a pointer
 207  * to its description. On error, it returns NULL.
 208  *****************************************************************************/
 209 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 210                                unsigned int i_width, unsigned int i_height,
 211                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 212 {
 213     vout_thread_t  * p_vout;                            /* thread descriptor */
 214     input_thread_t * p_input_thread;
 215     int              i_index;                               /* loop variable */
 216     char           * psz_plugin;
 217     vlc_value_t      val, text;
 218
 219     /* Allocate descriptor */
 220     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 221     if( p_vout == NULL )
 222     {
 223         msg_Err( p_parent, "out of memory" );
 224         return NULL;
 225     }
 226
 227     /* Initialize pictures - translation tables and functions
 228      * will be initialized later in InitThread */
 229     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 230     {
 231         p_vout->p_picture[i_index].pf_lock = NULL;
 232         p_vout->p_picture[i_index].pf_unlock = NULL;
 233         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 234         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 235         p_vout->p_picture[i_index].b_slow   = 0;
 236     }
 237
 238     /* No images in the heap */
 239     p_vout->i_heap_size = 0;
 240
 241     /* Initialize the rendering heap */
 242     I_RENDERPICTURES = 0;
 243     p_vout->render.i_width    = i_width;
 244     p_vout->render.i_height   = i_height;
 245     p_vout->render.i_chroma   = i_chroma;
 246     p_vout->render.i_aspect   = i_aspect;
 247
 248     p_vout->render.i_rmask    = 0;
 249     p_vout->render.i_gmask    = 0;
 250     p_vout->render.i_bmask    = 0;
 251
 252     p_vout->render.i_last_used_pic = -1;
 253     p_vout->render.b_allow_modify_pics = 1;
 254
 255     /* Zero the output heap */
 256     I_OUTPUTPICTURES = 0;
 257     p_vout->output.i_width    = 0;
 258     p_vout->output.i_height   = 0;
 259     p_vout->output.i_chroma   = 0;
 260     p_vout->output.i_aspect   = 0;
 261
 262     p_vout->output.i_rmask    = 0;
 263     p_vout->output.i_gmask    = 0;
 264     p_vout->output.i_bmask    = 0;
 265
 266     /* Initialize misc stuff */
 267     p_vout->i_changes    = 0;
 268     p_vout->f_gamma      = 0;
 269     p_vout->b_grayscale  = 0;
 270     p_vout->b_info       = 0;
 271     p_vout->b_interface  = 0;
 272     p_vout->b_scale      = 1;
 273     p_vout->b_fullscreen = 0;
 274     p_vout->i_alignment  = 0;
 275     p_vout->render_time  = 10;
 276     p_vout->c_fps_samples = 0;
 277     p_vout->b_filter_change = 0;
 278     p_vout->pf_control = 0;
 279     p_vout->p_parent_intf = 0;
 280
 281     /* Initialize locks */
 282     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 283     vlc_mutex_init( p_vout, &p_vout->change_lock );
 284
 285     /* Mouse coordinates */
 286     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 287     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 288     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 289     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 290     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 291
 292     /* Initialize subpicture unit */
 293     p_vout->p_spu = spu_Create( p_vout );
 294     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
 295
 296     /* Attach the new object now so we can use var inheritance below */
 297     vlc_object_attach( p_vout, p_parent );
 298
 299     spu_Init( p_vout->p_spu );
 300
 301     /* Take care of some "interface/control" related initialisations */
 302     vout_IntfInit( p_vout );
 303
 304     p_vout->b_override_aspect = VLC_FALSE;
 305
 306     /* If the parent is not a VOUT object, that means we are at the start of
 307      * the video output pipe */
 308     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 309     {
 310         var_Get( p_vout, "aspect-ratio", &val );
 311
 312         /* Check whether the user tried to override aspect ratio */
 313         if( val.psz_string )
 314         {
 315             unsigned int i_new_aspect = i_aspect;
 316             char *psz_parser = strchr( val.psz_string, ':' );
 317
 318             if( psz_parser )
 319             {
 320                 *psz_parser++ = '\0';
 321                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 322                                                       / atoi( psz_parser );
 323             }
 324             else
 325             {
 326                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 327                                        * atof( val.psz_string )
 328                                        / i_height;
 329             }
 330
 331             free( val.psz_string );
 332
 333             if( i_new_aspect && i_new_aspect != i_aspect )
 334             {
 335                 int i_aspect_x, i_aspect_y;
 336
 337                 AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 338
 339                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 340                          i_aspect_x, i_aspect_y );
 341
 342                 p_vout->render.i_aspect = i_new_aspect;
 343
 344                 p_vout->b_override_aspect = VLC_TRUE;
 345             }
 346         }
 347
 348         /* Look for the default filter configuration */
 349         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 350         var_Get( p_vout, "filter", &val );
 351         p_vout->psz_filter_chain = val.psz_string;
 352     }
 353     else
 354     {
 355         /* continue the parent's filter chain */
 356         char *psz_end;
 357
 358         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 359         if( psz_end && *(psz_end+1) )
 360             p_vout->psz_filter_chain = strdup( psz_end+1 );
 361         else p_vout->psz_filter_chain = NULL;
 362     }
 363
 364     /* Choose the video output module */
 365     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 366     {
 367         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 368         var_Get( p_vout, "vout", &val );
 369         psz_plugin = val.psz_string;
 370     }
 371     else
 372     {
 373         /* the filter chain is a string list of filters separated by double
 374          * colons */
 375         char *psz_end;
 376
 377         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 378         if( psz_end )
 379             psz_plugin = strndup( p_vout->psz_filter_chain,
 380                                   psz_end - p_vout->psz_filter_chain );
 381         else psz_plugin = strdup( p_vout->psz_filter_chain );
 382     }
 383
 384     /* Initialize the dimensions of the video window */
 385     InitWindowSize( p_vout, &p_vout->i_window_width,
 386                     &p_vout->i_window_height );
 387
 388     /* Create the vout thread */
 389     p_vout->p_module = module_Need( p_vout,
 390         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 391         "video filter" : "video output", psz_plugin, 0 );
 392
 393     if( psz_plugin ) free( psz_plugin );
 394     if( p_vout->p_module == NULL )
 395     {
 396         msg_Err( p_vout, "no suitable vout module" );
 397         vlc_object_detach( p_vout );
 398         vlc_object_destroy( p_vout );
 399         return NULL;
 400     }
 401
 402     /* Create a few object variables for interface interaction */
 403     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 404     text.psz_string = _("Deinterlace");
 405     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 406     val.psz_string = ""; text.psz_string = _("Disable");
 407     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 408     val.psz_string = "discard"; text.psz_string = _("Discard");
 409     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 410     val.psz_string = "blend"; text.psz_string = _("Blend");
 411     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 412     val.psz_string = "mean"; text.psz_string = _("Mean");
 413     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 414     val.psz_string = "bob"; text.psz_string = _("Bob");
 415     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 416     val.psz_string = "linear"; text.psz_string = _("Linear");
 417     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 418     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 419     {
 420         var_Set( p_vout, "deinterlace", val );
 421         if( val.psz_string ) free( val.psz_string );
 422     }
 423     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 424
 425
 426     var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 427     text.psz_string = _("Filters");
 428     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 429     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 430
 431     /* Calculate delay created by internal caching */
 432     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 433                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 434     if( p_input_thread )
 435     {
 436         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 437         vlc_object_release( p_input_thread );
 438     }
 439     else
 440     {
 441         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 442     }
 443
 444     if( vlc_thread_create( p_vout, "video output", RunThread,
 445                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 446     {
 447         msg_Err( p_vout, "out of memory" );
 448         module_Unneed( p_vout, p_vout->p_module );
 449         vlc_object_detach( p_vout );
 450         vlc_object_destroy( p_vout );
 451         return NULL;
 452     }
 453
 454     if( p_vout->b_error )
 455     {
 456         msg_Err( p_vout, "video output creation failed" );
 457
 458         /* Make sure the thread is destroyed */
 459         p_vout->b_die = VLC_TRUE;
 460
 461         vlc_thread_join( p_vout );
 462
 463         vlc_object_detach( p_vout );
 464         vlc_object_destroy( p_vout );
 465         return NULL;
 466     }
 467
 468     return p_vout;
 469 }
 470
 471 /*****************************************************************************
 472  * vout_Destroy: destroys a previously created video output
 473  *****************************************************************************
 474  * Destroy a terminated thread.
 475  * The function will request a destruction of the specified thread. If pi_error
 476  * is NULL, it will return once the thread is destroyed. Else, it will be
 477  * update using one of the THREAD_* constants.
 478  *****************************************************************************/
 479 void vout_Destroy( vout_thread_t *p_vout )
 480 {
 481     vlc_object_t *p_playlist;
 482
 483     /* Request thread destruction */
 484     p_vout->b_die = VLC_TRUE;
 485     vlc_thread_join( p_vout );
 486
 487     var_Destroy( p_vout, "intf-change" );
 488
 489     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 490                                   FIND_ANYWHERE );
 491
 492     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 493
 494     /* Free structure */
 495     vlc_object_destroy( p_vout );
 496
 497     /* If it was the last vout, tell the interface to show up */
 498     if( p_playlist != NULL )
 499     {
 500         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 501                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 502         if( p_another_vout == NULL )
 503         {
 504             vlc_value_t val;
 505             val.b_bool = VLC_TRUE;
 506             var_Set( p_playlist, "intf-show", val );
 507         }
 508         else
 509         {
 510             vlc_object_release( p_another_vout );
 511         }
 512         vlc_object_release( p_playlist );
 513     }
 514 }
 515
 516 /*****************************************************************************
 517  * InitThread: initialize video output thread
 518  *****************************************************************************
 519  * This function is called from RunThread and performs the second step of the
 520  * initialization. It returns 0 on success. Note that the thread's flag are not
 521  * modified inside this function.
 522  *****************************************************************************/
 523 static int InitThread( vout_thread_t *p_vout )
 524 {
 525     int i, i_aspect_x, i_aspect_y;
 526
 527     vlc_mutex_lock( &p_vout->change_lock );
 528
 529 #ifdef STATS
 530     p_vout->c_loops = 0;
 531 #endif
 532
 533     /* Initialize output method, it allocates direct buffers for us */
 534     if( p_vout->pf_init( p_vout ) )
 535     {
 536         vlc_mutex_unlock( &p_vout->change_lock );
 537         return VLC_EGENERIC;
 538     }
 539
 540     if( !I_OUTPUTPICTURES )
 541     {
 542         msg_Err( p_vout, "plugin was unable to allocate at least "
 543                          "one direct buffer" );
 544         p_vout->pf_end( p_vout );
 545         vlc_mutex_unlock( &p_vout->change_lock );
 546         return VLC_EGENERIC;
 547     }
 548
 549     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 550     {
 551         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 552                          "our internal buffers must have overflown." );
 553         p_vout->pf_end( p_vout );
 554         vlc_mutex_unlock( &p_vout->change_lock );
 555         return VLC_EGENERIC;
 556     }
 557
 558     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 559
 560     AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 561     msg_Dbg( p_vout,
 562              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 563              p_vout->render.i_width, p_vout->render.i_height,
 564              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 565              i_aspect_x, i_aspect_y );
 566
 567     AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 568     msg_Dbg( p_vout,
 569              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 570              p_vout->output.i_width, p_vout->output.i_height,
 571              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 572              i_aspect_x, i_aspect_y );
 573
 574     /* Calculate shifts from system-updated masks */
 575     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 576                  p_vout->output.i_rmask );
 577     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 578                  p_vout->output.i_gmask );
 579     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 580                  p_vout->output.i_bmask );
 581
 582     /* Check whether we managed to create direct buffers similar to
 583      * the render buffers, ie same size and chroma */
 584     if( ( p_vout->output.i_width == p_vout->render.i_width )
 585      && ( p_vout->output.i_height == p_vout->render.i_height )
 586      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 587     {
 588         /* Cool ! We have direct buffers, we can ask the decoder to
 589          * directly decode into them ! Map the first render buffers to
 590          * the first direct buffers, but keep the first direct buffer
 591          * for memcpy operations */
 592         p_vout->b_direct = 1;
 593
 594         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 595         {
 596             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 597                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 598                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 599             {
 600                 /* We have enough direct buffers so there's no need to
 601                  * try to use system memory buffers. */
 602                 break;
 603             }
 604             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 605             I_RENDERPICTURES++;
 606         }
 607
 608         msg_Dbg( p_vout, "direct render, mapping "
 609                  "render pictures 0-%i to system pictures 1-%i",
 610                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 611     }
 612     else
 613     {
 614         /* Rats... Something is wrong here, we could not find an output
 615          * plugin able to directly render what we decode. See if we can
 616          * find a chroma plugin to do the conversion */
 617         p_vout->b_direct = 0;
 618
 619         /* Choose the best module */
 620         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 621
 622         if( p_vout->chroma.p_module == NULL )
 623         {
 624             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 625                      (char*)&p_vout->render.i_chroma,
 626                      (char*)&p_vout->output.i_chroma );
 627             p_vout->pf_end( p_vout );
 628             vlc_mutex_unlock( &p_vout->change_lock );
 629             return VLC_EGENERIC;
 630         }
 631
 632         msg_Dbg( p_vout, "indirect render, mapping "
 633                  "render pictures 0-%i to system pictures %i-%i",
 634                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 635                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 636
 637         /* Append render buffers after the direct buffers */
 638         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 639         {
 640             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 641             I_RENDERPICTURES++;
 642
 643             /* Check if we have enough render pictures */
 644             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 645                 break;
 646         }
 647     }
 648
 649     /* Link pictures back to their heap */
 650     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 651     {
 652         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 653     }
 654
 655     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 656     {
 657         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 658     }
 659
 660 /* XXX XXX mark thread ready */
 661     return VLC_SUCCESS;
 662 }
 663
 664 /*****************************************************************************
 665  * RunThread: video output thread
 666  *****************************************************************************
 667  * Video output thread. This function does only returns when the thread is
 668  * terminated. It handles the pictures arriving in the video heap and the
 669  * display device events.
 670  *****************************************************************************/
 671 static void RunThread( vout_thread_t *p_vout)
 672 {
 673     int             i_index;                                /* index in heap */
 674     int             i_idle_loops = 0;  /* loops without displaying a picture */
 675     mtime_t         current_date;                            /* current date */
 676     mtime_t         display_date;                            /* display date */
 677
 678     picture_t *     p_picture;                            /* picture pointer */
 679     picture_t *     p_last_picture = NULL;                   /* last picture */
 680     picture_t *     p_directbuffer;              /* direct buffer to display */
 681
 682     subpicture_t *  p_subpic;                          /* subpicture pointer */
 683
 684     /*
 685      * Initialize thread
 686      */
 687     p_vout->b_error = InitThread( p_vout );
 688
 689     /* signal the creation of the vout */
 690     vlc_thread_ready( p_vout );
 691
 692     if( p_vout->b_error )
 693     {
 694         /* Destroy thread structures allocated by Create and InitThread */
 695         DestroyThread( p_vout );
 696         return;
 697     }
 698
 699     /*
 700      * Main loop - it is not executed if an error occurred during
 701      * initialization
 702      */
 703     while( (!p_vout->b_die) && (!p_vout->b_error) )
 704     {
 705         /* Initialize loop variables */
 706         p_picture = NULL;
 707         display_date = 0;
 708         current_date = mdate();
 709
 710 #if 0
 711         p_vout->c_loops++;
 712         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 713         {
 714             msg_Dbg( p_vout, "picture heap: %d/%d",
 715                      I_RENDERPICTURES, p_vout->i_heap_size );
 716         }
 717 #endif
 718
 719         /*
 720          * Find the picture to display (the one with the earliest date).
 721          * This operation does not need lock, since only READY_PICTUREs
 722          * are handled. */
 723         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 724         {
 725             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 726                 && ( (p_picture == NULL) ||
 727                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 728             {
 729                 p_picture = PP_RENDERPICTURE[i_index];
 730                 display_date = p_picture->date;
 731             }
 732         }
 733
 734         if( p_picture )
 735         {
 736             /* If we met the last picture, parse again to see whether there is
 737              * a more appropriate one. */
 738             if( p_picture == p_last_picture )
 739             {
 740                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 741                 {
 742                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 743                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 744                         && ((p_picture == p_last_picture) ||
 745                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 746                     {
 747                         p_picture = PP_RENDERPICTURE[i_index];
 748                         display_date = p_picture->date;
 749                     }
 750                 }
 751             }
 752
 753             /* If we found better than the last picture, destroy it */
 754             if( p_last_picture && p_picture != p_last_picture )
 755             {
 756                 vlc_mutex_lock( &p_vout->picture_lock );
 757                 if( p_last_picture->i_refcount )
 758                 {
 759                     p_last_picture->i_status = DISPLAYED_PICTURE;
 760                 }
 761                 else
 762                 {
 763                     p_last_picture->i_status = DESTROYED_PICTURE;
 764                     p_vout->i_heap_size--;
 765                 }
 766                 vlc_mutex_unlock( &p_vout->picture_lock );
 767                 p_last_picture = NULL;
 768             }
 769
 770             /* Compute FPS rate */
 771             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 772                 = display_date;
 773
 774             if( !p_picture->b_force &&
 775                 p_picture != p_last_picture &&
 776                 display_date < current_date + p_vout->render_time )
 777             {
 778                 /* Picture is late: it will be destroyed and the thread
 779                  * will directly choose the next picture */
 780                 vlc_mutex_lock( &p_vout->picture_lock );
 781                 if( p_picture->i_refcount )
 782                 {
 783                     /* Pretend we displayed the picture, but don't destroy
 784                      * it since the decoder might still need it. */
 785                     p_picture->i_status = DISPLAYED_PICTURE;
 786                 }
 787                 else
 788                 {
 789                     /* Destroy the picture without displaying it */
 790                     p_picture->i_status = DESTROYED_PICTURE;
 791                     p_vout->i_heap_size--;
 792                 }
 793                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 794                                   current_date - display_date );
 795                 vlc_mutex_unlock( &p_vout->picture_lock );
 796
 797                 continue;
 798             }
 799
 800             if( display_date >
 801                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 802             {
 803                 /* Picture is waaay too early: it will be destroyed */
 804                 vlc_mutex_lock( &p_vout->picture_lock );
 805                 if( p_picture->i_refcount )
 806                 {
 807                     /* Pretend we displayed the picture, but don't destroy
 808                      * it since the decoder might still need it. */
 809                     p_picture->i_status = DISPLAYED_PICTURE;
 810                 }
 811                 else
 812                 {
 813                     /* Destroy the picture without displaying it */
 814                     p_picture->i_status = DESTROYED_PICTURE;
 815                     p_vout->i_heap_size--;
 816                 }
 817                 msg_Warn( p_vout, "vout warning: early picture skipped "
 818                           "("I64Fd")", display_date - current_date
 819                           - p_vout->i_pts_delay );
 820                 vlc_mutex_unlock( &p_vout->picture_lock );
 821
 822                 continue;
 823             }
 824
 825             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 826             {
 827                 /* A picture is ready to be rendered, but its rendering date
 828                  * is far from the current one so the thread will perform an
 829                  * empty loop as if no picture were found. The picture state
 830                  * is unchanged */
 831                 p_picture    = NULL;
 832                 display_date = 0;
 833             }
 834             else if( p_picture == p_last_picture )
 835             {
 836                 /* We are asked to repeat the previous picture, but we first
 837                  * wait for a couple of idle loops */
 838                 if( i_idle_loops < 4 )
 839                 {
 840                     p_picture    = NULL;
 841                     display_date = 0;
 842                 }
 843                 else
 844                 {
 845                     /* We set the display date to something high, otherwise
 846                      * we'll have lots of problems with late pictures */
 847                     display_date = current_date + p_vout->render_time;
 848                 }
 849             }
 850         }
 851
 852         if( p_picture == NULL )
 853         {
 854             i_idle_loops++;
 855         }
 856
 857         /*
 858          * Check for subpictures to display
 859          */
 860         p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 861
 862         /*
 863          * Perform rendering
 864          */
 865         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 866
 867         /*
 868          * Call the plugin-specific rendering method if there is one
 869          */
 870         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 871         {
 872             /* Render the direct buffer returned by vout_RenderPicture */
 873             p_vout->pf_render( p_vout, p_directbuffer );
 874         }
 875
 876         /*
 877          * Sleep, wake up
 878          */
 879         if( display_date != 0 && p_directbuffer != NULL )
 880         {
 881             mtime_t current_render_time = mdate() - current_date;
 882             /* if render time is very large we don't include it in the mean */
 883             if( current_render_time < p_vout->render_time +
 884                 VOUT_DISPLAY_DELAY )
 885             {
 886                 /* Store render time using a sliding mean weighting to
 887                  * current value in a 3 to 1 ratio*/
 888                 p_vout->render_time *= 3;
 889                 p_vout->render_time += current_render_time;
 890                 p_vout->render_time >>= 2;
 891             }
 892         }
 893
 894         /* Give back change lock */
 895         vlc_mutex_unlock( &p_vout->change_lock );
 896
 897         /* Sleep a while or until a given date */
 898         if( display_date != 0 )
 899         {
 900             /* If there are filters in the chain, better give them the picture
 901              * in advance */
 902             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 903             {
 904                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 905             }
 906         }
 907         else
 908         {
 909             msleep( VOUT_IDLE_SLEEP );
 910         }
 911
 912         /* On awakening, take back lock and send immediately picture
 913          * to display. */
 914         vlc_mutex_lock( &p_vout->change_lock );
 915
 916         /*
 917          * Display the previously rendered picture
 918          */
 919         if( p_picture != NULL && p_directbuffer != NULL )
 920         {
 921             /* Display the direct buffer returned by vout_RenderPicture */
 922             if( p_vout->pf_display )
 923             {
 924                 p_vout->pf_display( p_vout, p_directbuffer );
 925             }
 926
 927             /* Tell the vout this was the last picture and that it does not
 928              * need to be forced anymore. */
 929             p_last_picture = p_picture;
 930             p_last_picture->b_force = 0;
 931         }
 932
 933         if( p_picture != NULL )
 934         {
 935             /* Reinitialize idle loop count */
 936             i_idle_loops = 0;
 937         }
 938
 939         /*
 940          * Check events and manage thread
 941          */
 942         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 943         {
 944             /* A fatal error occurred, and the thread must terminate
 945              * immediately, without displaying anything - setting b_error to 1
 946              * causes the immediate end of the main while() loop. */
 947             p_vout->b_error = 1;
 948         }
 949
 950         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 951         {
 952             /* this must only happen when the vout plugin is incapable of
 953              * rescaling the picture itself. In this case we need to destroy
 954              * the current picture buffers and recreate new ones with the right
 955              * dimensions */
 956             int i;
 957
 958             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 959
 960             p_vout->pf_end( p_vout );
 961             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 962                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 963
 964             I_OUTPUTPICTURES = 0;
 965             if( p_vout->pf_init( p_vout ) )
 966             {
 967                 msg_Err( p_vout, "cannot resize display" );
 968                 /* FIXME: pf_end will be called again in EndThread() */
 969                 p_vout->b_error = 1;
 970             }
 971
 972             /* Need to reinitialise the chroma plugin */
 973             if( p_vout->chroma.p_module )
 974             {
 975                 if( p_vout->chroma.p_module->pf_deactivate )
 976                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
 977                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
 978             }
 979         }
 980
 981         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
 982         {
 983             /* This happens when the picture buffers need to be recreated.
 984              * This is useful on multimonitor displays for instance.
 985              *
 986              * Warning: This only works when the vout creates only 1 picture
 987              * buffer!! */
 988             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
 989
 990             if( !p_vout->b_direct )
 991             {
 992                 module_Unneed( p_vout, p_vout->chroma.p_module );
 993             }
 994
 995             vlc_mutex_lock( &p_vout->picture_lock );
 996
 997             p_vout->pf_end( p_vout );
 998
 999             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1000
1001             p_vout->b_error = InitThread( p_vout );
1002
1003             vlc_mutex_unlock( &p_vout->picture_lock );
1004         }
1005     }
1006
1007     /*
1008      * Error loop - wait until the thread destruction is requested
1009      */
1010     if( p_vout->b_error )
1011     {
1012         ErrorThread( p_vout );
1013     }
1014
1015     /* End of thread */
1016     EndThread( p_vout );
1017
1018     /* Destroy thread structures allocated by CreateThread */
1019     DestroyThread( p_vout );
1020 }
1021
1022 /*****************************************************************************
1023  * ErrorThread: RunThread() error loop
1024  *****************************************************************************
1025  * This function is called when an error occurred during thread main's loop.
1026  * The thread can still receive feed, but must be ready to terminate as soon
1027  * as possible.
1028  *****************************************************************************/
1029 static void ErrorThread( vout_thread_t *p_vout )
1030 {
1031     /* Wait until a `die' order */
1032     while( !p_vout->b_die )
1033     {
1034         /* Sleep a while */
1035         msleep( VOUT_IDLE_SLEEP );
1036     }
1037 }
1038
1039 /*****************************************************************************
1040  * EndThread: thread destruction
1041  *****************************************************************************
1042  * This function is called when the thread ends after a sucessful
1043  * initialization. It frees all resources allocated by InitThread.
1044  *****************************************************************************/
1045 static void EndThread( vout_thread_t *p_vout )
1046 {
1047     int     i_index;                                        /* index in heap */
1048
1049 #ifdef STATS
1050     {
1051         struct tms cpu_usage;
1052         times( &cpu_usage );
1053
1054         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1055                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1056     }
1057 #endif
1058
1059     if( !p_vout->b_direct )
1060     {
1061         module_Unneed( p_vout, p_vout->chroma.p_module );
1062     }
1063
1064     /* Destroy all remaining pictures */
1065     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1066     {
1067         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1068         {
1069             free( p_vout->p_picture[i_index].p_data_orig );
1070         }
1071     }
1072
1073     /* Destroy subpicture unit */
1074     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1075     spu_Destroy( p_vout->p_spu );
1076
1077     /* Destroy translation tables */
1078     p_vout->pf_end( p_vout );
1079
1080     /* Release the change lock */
1081     vlc_mutex_unlock( &p_vout->change_lock );
1082 }
1083
1084 /*****************************************************************************
1085  * DestroyThread: thread destruction
1086  *****************************************************************************
1087  * This function is called when the thread ends. It frees all ressources
1088  * allocated by CreateThread. Status is available at this stage.
1089  *****************************************************************************/
1090 static void DestroyThread( vout_thread_t *p_vout )
1091 {
1092     /* Destroy the locks */
1093     vlc_mutex_destroy( &p_vout->picture_lock );
1094     vlc_mutex_destroy( &p_vout->change_lock );
1095
1096     /* Release the module */
1097     if( p_vout && p_vout->p_module )
1098     {
1099         module_Unneed( p_vout, p_vout->p_module );
1100     }
1101 }
1102
1103 /* following functions are local */
1104
1105 static int ReduceHeight( int i_ratio )
1106 {
1107     int i_dummy = VOUT_ASPECT_FACTOR;
1108     int i_pgcd  = 1;
1109
1110     if( !i_ratio )
1111     {
1112         return i_pgcd;
1113     }
1114
1115     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1116     while( !(i_ratio & 1) && !(i_dummy & 1) )
1117     {
1118         i_ratio >>= 1;
1119         i_dummy >>= 1;
1120         i_pgcd  <<= 1;
1121     }
1122
1123     while( !(i_ratio % 3) && !(i_dummy % 3) )
1124     {
1125         i_ratio /= 3;
1126         i_dummy /= 3;
1127         i_pgcd  *= 3;
1128     }
1129
1130     while( !(i_ratio % 5) && !(i_dummy % 5) )
1131     {
1132         i_ratio /= 5;
1133         i_dummy /= 5;
1134         i_pgcd  *= 5;
1135     }
1136
1137     return i_pgcd;
1138 }
1139
1140 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1141 {
1142     unsigned int i_pgcd = ReduceHeight( i_aspect );
1143     *i_aspect_x = i_aspect / i_pgcd;
1144     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1145 }
1146
1147 /*****************************************************************************
1148  * BinaryLog: computes the base 2 log of a binary value
1149  *****************************************************************************
1150  * This functions is used by MaskToShift, to get a bit index from a binary
1151  * value.
1152  *****************************************************************************/
1153 static int BinaryLog( uint32_t i )
1154 {
1155     int i_log = 0;
1156
1157     if( i == 0 ) return -31337;
1158
1159     if( i & 0xffff0000 ) i_log += 16;
1160     if( i & 0xff00ff00 ) i_log += 8;
1161     if( i & 0xf0f0f0f0 ) i_log += 4;
1162     if( i & 0xcccccccc ) i_log += 2;
1163     if( i & 0xaaaaaaaa ) i_log += 1;
1164
1165     return i_log;
1166 }
1167
1168 /*****************************************************************************
1169  * MaskToShift: transform a color mask into right and left shifts
1170  *****************************************************************************
1171  * This function is used for obtaining color shifts from masks.
1172  *****************************************************************************/
1173 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1174 {
1175     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1176
1177     if( !i_mask )
1178     {
1179         *pi_left = *pi_right = 0;
1180         return;
1181     }
1182
1183     /* Get bits */
1184     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1185     i_high = i_mask + i_low;                       /* higher bit of the mask */
1186
1187     /* Transform bits into an index */
1188     i_low =  BinaryLog (i_low);
1189     i_high = BinaryLog (i_high);
1190
1191     /* Update pointers and return */
1192     *pi_left =   i_low;
1193     *pi_right = (8 - i_high + i_low);
1194 }
1195
1196 /*****************************************************************************
1197  * InitWindowSize: find the initial dimensions the video window should have.
1198  *****************************************************************************
1199  * This function will check the "width", "height" and "zoom" config options and
1200  * will calculate the size that the video window should have.
1201  *****************************************************************************/
1202 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1203                             int *pi_height )
1204 {
1205     vlc_value_t val;
1206     int i_width, i_height;
1207     uint64_t ll_zoom;
1208
1209 #define FP_FACTOR 1000                             /* our fixed point factor */
1210
1211     var_Get( p_vout, "align", &val );
1212     p_vout->i_alignment = val.i_int;
1213
1214     var_Get( p_vout, "width", &val );
1215     i_width = val.i_int;
1216     var_Get( p_vout, "height", &val );
1217     i_height = val.i_int;
1218     var_Get( p_vout, "zoom", &val );
1219     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1220
1221     if( i_width > 0 && i_height > 0)
1222     {
1223         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1224         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1225         return;
1226     }
1227     else if( i_width > 0 )
1228     {
1229         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1230         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1231                             p_vout->render.i_aspect / FP_FACTOR );
1232         return;
1233     }
1234     else if( i_height > 0 )
1235     {
1236         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1237         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1238                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1239         return;
1240     }
1241
1242     if( p_vout->render.i_height * p_vout->render.i_aspect
1243         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1244     {
1245         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1246           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1247         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1248     }
1249     else
1250     {
1251         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1252         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1253           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1254     }
1255
1256 #undef FP_FACTOR
1257 }
1258
1259 /*****************************************************************************
1260  * vout_VarCallback: generic callback for intf variables
1261  *****************************************************************************/
1262 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1263                       vlc_value_t old_value, vlc_value_t new_value,
1264                       void * unused )
1265 {
1266     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1267     vlc_value_t val;
1268     val.b_bool = VLC_TRUE;
1269     var_Set( p_vout, "intf-change", val );
1270     return VLC_SUCCESS;
1271 }
1272
1273 /*****************************************************************************
1274  * Helper thread for object variables callbacks.
1275  * Only used to avoid deadlocks when using the video embedded mode.
1276  *****************************************************************************/
1277 typedef struct suxor_thread_t
1278 {
1279     VLC_COMMON_MEMBERS
1280     input_thread_t *p_input;
1281
1282 } suxor_thread_t;
1283
1284 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1285 {
1286     vlc_value_t val;
1287
1288     /* Now restart current video stream */
1289     var_Get( p_this->p_input, "video-es", &val );
1290     if( val.i_int >= 0 )
1291     {
1292         vlc_value_t val_es;
1293         val_es.i_int = -VIDEO_ES;
1294         var_Set( p_this->p_input, "video-es", val_es );
1295         var_Set( p_this->p_input, "video-es", val );
1296     }
1297
1298     vlc_object_release( p_this->p_input );
1299
1300 #ifdef WIN32
1301     CloseHandle( p_this->thread_id );
1302 #endif
1303
1304     vlc_object_destroy( p_this );
1305 }
1306
1307 /*****************************************************************************
1308  * object variables callbacks: a bunch of object variables are used by the
1309  * interfaces to interact with the vout.
1310  *****************************************************************************/
1311 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1312                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1313 {
1314     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1315     input_thread_t *p_input;
1316     vlc_value_t val;
1317
1318     char *psz_mode = newval.psz_string;
1319     char *psz_filter, *psz_deinterlace = NULL;
1320
1321     var_Get( p_vout, "filter", &val );
1322     psz_filter = val.psz_string;
1323     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1324
1325     if( !psz_mode || !*psz_mode )
1326     {
1327         if( psz_deinterlace )
1328         {
1329             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1330             if( psz_src[0] == ',' ) psz_src++;
1331             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1332         }
1333     }
1334     else if( !psz_deinterlace )
1335     {
1336         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1337                               sizeof(",deinterlace") );
1338         if( psz_filter && *psz_filter ) strcat( psz_filter, "," );
1339         strcat( psz_filter, "deinterlace" );
1340     }
1341
1342     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1343                                                  FIND_PARENT );
1344     if( !p_input ) return VLC_EGENERIC;
1345
1346     if( psz_mode && *psz_mode )
1347     {
1348         /* Modify input as well because the vout might have to be restarted */
1349         val.psz_string = psz_mode;
1350         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1351         var_Set( p_input, "deinterlace-mode", val );
1352     }
1353     vlc_object_release( p_input );
1354
1355     val.b_bool = VLC_TRUE;
1356     var_Set( p_vout, "intf-change", val );
1357
1358     val.psz_string = psz_filter;
1359     var_Set( p_vout, "filter", val );
1360     if( psz_filter ) free( psz_filter );
1361
1362     return VLC_SUCCESS;
1363 }
1364
1365 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1366                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1367 {
1368     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1369     input_thread_t *p_input;
1370     vlc_value_t val;
1371
1372     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1373                                                  FIND_PARENT );
1374     if (!p_input)
1375     {
1376         msg_Err( p_vout, "Input not found" );
1377         return( VLC_EGENERIC );
1378     }
1379
1380     val.b_bool = VLC_TRUE;
1381     var_Set( p_vout, "intf-change", val );
1382
1383     /* Modify input as well because the vout might have to be restarted */
1384     val.psz_string = newval.psz_string;
1385     var_Create( p_input, "filter", VLC_VAR_STRING );
1386     var_Set( p_input, "filter", val );
1387
1388     /* Now restart current video stream */
1389     var_Get( p_input, "video-es", &val );
1390     if( val.i_int >= 0 )
1391     {
1392         p_vout->b_filter_change = VLC_TRUE;
1393         suxor_thread_t *p_suxor =
1394             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1395         p_suxor->p_input = p_input;
1396         vlc_object_yield( p_input );
1397         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1398                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1399     }
1400
1401     vlc_object_release( p_input );
1402
1403     return VLC_SUCCESS;
1404 }