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 /* From vout_intf.c */
  69 int vout_Snapshot( vout_thread_t *, picture_t * );
  70
  71 /*****************************************************************************
  72  * vout_Request: find a video output thread, create one, or destroy one.
  73  *****************************************************************************
  74  * This function looks for a video output thread matching the current
  75  * properties. If not found, it spawns a new one.
  76  *****************************************************************************/
  77 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  78                                  unsigned int i_width, unsigned int i_height,
  79                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  80 {
  81     if( !i_width || !i_height || !i_chroma )
  82     {
  83         /* Reattach video output to input before bailing out */
  84         if( p_vout )
  85         {
  86             vlc_object_t *p_playlist;
  87
  88             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
  89                                           FIND_ANYWHERE );
  90
  91             if( p_playlist )
  92             {
  93                 spu_Attach( p_vout->p_spu, p_this, VLC_FALSE );
  94                 vlc_object_detach( p_vout );
  95                 vlc_object_attach( p_vout, p_playlist );
  96
  97                 vlc_object_release( p_playlist );
  98             }
  99             else
 100             {
 101                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 102                 vlc_object_detach( p_vout );
 103                 vout_Destroy( p_vout );
 104             }
 105         }
 106         return NULL;
 107     }
 108
 109     /* If a video output was provided, lock it, otherwise look for one. */
 110     if( p_vout )
 111     {
 112         vlc_object_yield( p_vout );
 113     }
 114     else
 115     {
 116         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 117
 118         if( !p_vout )
 119         {
 120             vlc_object_t *p_playlist;
 121
 122             p_playlist = vlc_object_find( p_this,
 123                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 124             if( p_playlist )
 125             {
 126                 p_vout = vlc_object_find( p_playlist,
 127                                           VLC_OBJECT_VOUT, FIND_CHILD );
 128                 /* only first children of p_input for unused vout */
 129                 if( p_vout && p_vout->p_parent != p_playlist )
 130                 {
 131                     vlc_object_release( p_vout );
 132                     p_vout = NULL;
 133                 }
 134                 vlc_object_release( p_playlist );
 135             }
 136         }
 137     }
 138
 139     /* If we now have a video output, check it has the right properties */
 140     if( p_vout )
 141     {
 142         char *psz_filter_chain;
 143         vlc_value_t val;
 144
 145         /* We don't directly check for the "filter" variable for obvious
 146          * performance reasons. */
 147         if( p_vout->b_filter_change )
 148         {
 149             var_Get( p_vout, "filter", &val );
 150             psz_filter_chain = val.psz_string;
 151
 152             if( psz_filter_chain && !*psz_filter_chain )
 153             {
 154                 free( psz_filter_chain );
 155                 psz_filter_chain = NULL;
 156             }
 157             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 158             {
 159                 free( p_vout->psz_filter_chain );
 160                 p_vout->psz_filter_chain = NULL;
 161             }
 162
 163             if( !psz_filter_chain && !p_vout->psz_filter_chain )
 164             {
 165                 p_vout->b_filter_change = VLC_FALSE;
 166             }
 167
 168             if( psz_filter_chain ) free( psz_filter_chain );
 169         }
 170
 171         if( ( p_vout->render.i_width != i_width ) ||
 172             ( p_vout->render.i_height != i_height ) ||
 173             ( p_vout->render.i_chroma != i_chroma ) ||
 174             ( p_vout->render.i_aspect != i_aspect
 175                     && !p_vout->b_override_aspect ) ||
 176             p_vout->b_filter_change )
 177         {
 178             /* We are not interested in this format, close this vout */
 179             vlc_object_detach( p_vout );
 180             vlc_object_release( p_vout );
 181             vout_Destroy( p_vout );
 182             p_vout = NULL;
 183         }
 184         else
 185         {
 186             /* This video output is cool! Hijack it. */
 187             vlc_object_detach( p_vout );
 188             spu_Attach( p_vout->p_spu, p_this, VLC_TRUE );
 189             vlc_object_attach( p_vout, p_this );
 190             vlc_object_release( p_vout );
 191         }
 192     }
 193
 194     if( !p_vout )
 195     {
 196         msg_Dbg( p_this, "no usable vout present, spawning one" );
 197
 198         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 199     }
 200
 201     return p_vout;
 202 }
 203
 204 /*****************************************************************************
 205  * vout_Create: creates a new video output thread
 206  *****************************************************************************
 207  * This function creates a new video output thread, and returns a pointer
 208  * to its description. On error, it returns NULL.
 209  *****************************************************************************/
 210 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 211                                unsigned int i_width, unsigned int i_height,
 212                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 213 {
 214     vout_thread_t  * p_vout;                            /* thread descriptor */
 215     input_thread_t * p_input_thread;
 216     int              i_index;                               /* loop variable */
 217     char           * psz_plugin;
 218     vlc_value_t      val, text;
 219
 220     /* Allocate descriptor */
 221     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 222     if( p_vout == NULL )
 223     {
 224         msg_Err( p_parent, "out of memory" );
 225         return NULL;
 226     }
 227
 228     /* Initialize pictures - translation tables and functions
 229      * will be initialized later in InitThread */
 230     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 231     {
 232         p_vout->p_picture[i_index].pf_lock = NULL;
 233         p_vout->p_picture[i_index].pf_unlock = NULL;
 234         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 235         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 236         p_vout->p_picture[i_index].b_slow   = 0;
 237     }
 238
 239     /* No images in the heap */
 240     p_vout->i_heap_size = 0;
 241
 242     /* Initialize the rendering heap */
 243     I_RENDERPICTURES = 0;
 244     p_vout->render.i_width    = i_width;
 245     p_vout->render.i_height   = i_height;
 246     p_vout->render.i_chroma   = i_chroma;
 247     p_vout->render.i_aspect   = i_aspect;
 248
 249     p_vout->render.i_rmask    = 0;
 250     p_vout->render.i_gmask    = 0;
 251     p_vout->render.i_bmask    = 0;
 252
 253     p_vout->render.i_last_used_pic = -1;
 254     p_vout->render.b_allow_modify_pics = 1;
 255
 256     /* Zero the output heap */
 257     I_OUTPUTPICTURES = 0;
 258     p_vout->output.i_width    = 0;
 259     p_vout->output.i_height   = 0;
 260     p_vout->output.i_chroma   = 0;
 261     p_vout->output.i_aspect   = 0;
 262
 263     p_vout->output.i_rmask    = 0;
 264     p_vout->output.i_gmask    = 0;
 265     p_vout->output.i_bmask    = 0;
 266
 267     /* Initialize misc stuff */
 268     p_vout->i_changes    = 0;
 269     p_vout->f_gamma      = 0;
 270     p_vout->b_grayscale  = 0;
 271     p_vout->b_info       = 0;
 272     p_vout->b_interface  = 0;
 273     p_vout->b_scale      = 1;
 274     p_vout->b_fullscreen = 0;
 275     p_vout->i_alignment  = 0;
 276     p_vout->render_time  = 10;
 277     p_vout->c_fps_samples = 0;
 278     p_vout->b_filter_change = 0;
 279     p_vout->pf_control = 0;
 280     p_vout->p_parent_intf = 0;
 281
 282     /* Initialize locks */
 283     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 284     vlc_mutex_init( p_vout, &p_vout->change_lock );
 285
 286     /* Mouse coordinates */
 287     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 288     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 289     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 290     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 291     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 292
 293     /* Initialize subpicture unit */
 294     p_vout->p_spu = spu_Create( p_vout );
 295     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
 296
 297     /* Attach the new object now so we can use var inheritance below */
 298     vlc_object_attach( p_vout, p_parent );
 299
 300     spu_Init( p_vout->p_spu );
 301
 302     /* Take care of some "interface/control" related initialisations */
 303     vout_IntfInit( p_vout );
 304
 305     p_vout->b_override_aspect = VLC_FALSE;
 306
 307     /* If the parent is not a VOUT object, that means we are at the start of
 308      * the video output pipe */
 309     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 310     {
 311         var_Get( p_vout, "aspect-ratio", &val );
 312
 313         /* Check whether the user tried to override aspect ratio */
 314         if( val.psz_string )
 315         {
 316             unsigned int i_new_aspect = i_aspect;
 317             char *psz_parser = strchr( val.psz_string, ':' );
 318
 319             if( psz_parser )
 320             {
 321                 *psz_parser++ = '\0';
 322                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 323                                                       / atoi( psz_parser );
 324             }
 325             else
 326             {
 327                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 328                                        * atof( val.psz_string )
 329                                        / i_height;
 330             }
 331
 332             free( val.psz_string );
 333
 334             if( i_new_aspect && i_new_aspect != i_aspect )
 335             {
 336                 int i_aspect_x, i_aspect_y;
 337
 338                 AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 339
 340                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 341                          i_aspect_x, i_aspect_y );
 342
 343                 p_vout->render.i_aspect = i_new_aspect;
 344
 345                 p_vout->b_override_aspect = VLC_TRUE;
 346             }
 347         }
 348
 349         /* Look for the default filter configuration */
 350         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 351         var_Get( p_vout, "filter", &val );
 352         p_vout->psz_filter_chain = val.psz_string;
 353     }
 354     else
 355     {
 356         /* continue the parent's filter chain */
 357         char *psz_end;
 358
 359         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ',' );
 360         if( psz_end && *(psz_end+1) )
 361             p_vout->psz_filter_chain = strdup( psz_end+1 );
 362         else p_vout->psz_filter_chain = NULL;
 363     }
 364
 365     /* Choose the video output module */
 366     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 367     {
 368         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 369         var_Get( p_vout, "vout", &val );
 370         psz_plugin = val.psz_string;
 371     }
 372     else
 373     {
 374         /* the filter chain is a string list of filters separated by double
 375          * colons */
 376         char *psz_end;
 377
 378         psz_end = strchr( p_vout->psz_filter_chain, ',' );
 379         if( psz_end )
 380             psz_plugin = strndup( p_vout->psz_filter_chain,
 381                                   psz_end - p_vout->psz_filter_chain );
 382         else psz_plugin = strdup( p_vout->psz_filter_chain );
 383     }
 384
 385     /* Initialize the dimensions of the video window */
 386     InitWindowSize( p_vout, &p_vout->i_window_width,
 387                     &p_vout->i_window_height );
 388
 389     /* Create the vout thread */
 390     p_vout->p_module = module_Need( p_vout,
 391         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 392         "video filter" : "video output", psz_plugin, 0 );
 393
 394     if( psz_plugin ) free( psz_plugin );
 395     if( p_vout->p_module == NULL )
 396     {
 397         msg_Err( p_vout, "no suitable vout module" );
 398         vlc_object_detach( p_vout );
 399         vlc_object_destroy( p_vout );
 400         return NULL;
 401     }
 402
 403     /* Create a few object variables for interface interaction */
 404     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 405     text.psz_string = _("Deinterlace");
 406     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 407     val.psz_string = ""; text.psz_string = _("Disable");
 408     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 409     val.psz_string = "discard"; text.psz_string = _("Discard");
 410     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 411     val.psz_string = "blend"; text.psz_string = _("Blend");
 412     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 413     val.psz_string = "mean"; text.psz_string = _("Mean");
 414     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 415     val.psz_string = "bob"; text.psz_string = _("Bob");
 416     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 417     val.psz_string = "linear"; text.psz_string = _("Linear");
 418     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 419     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 420     {
 421         var_Set( p_vout, "deinterlace", val );
 422         if( val.psz_string ) free( val.psz_string );
 423     }
 424     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 425
 426
 427     var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 428     text.psz_string = _("Filters");
 429     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 430     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 431
 432     /* Calculate delay created by internal caching */
 433     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 434                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 435     if( p_input_thread )
 436     {
 437         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 438         vlc_object_release( p_input_thread );
 439     }
 440     else
 441     {
 442         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 443     }
 444
 445     if( vlc_thread_create( p_vout, "video output", RunThread,
 446                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 447     {
 448         msg_Err( p_vout, "out of memory" );
 449         module_Unneed( p_vout, p_vout->p_module );
 450         vlc_object_detach( p_vout );
 451         vlc_object_destroy( p_vout );
 452         return NULL;
 453     }
 454
 455     if( p_vout->b_error )
 456     {
 457         msg_Err( p_vout, "video output creation failed" );
 458
 459         /* Make sure the thread is destroyed */
 460         p_vout->b_die = VLC_TRUE;
 461
 462         vlc_thread_join( p_vout );
 463
 464         vlc_object_detach( p_vout );
 465         vlc_object_destroy( p_vout );
 466         return NULL;
 467     }
 468
 469     return p_vout;
 470 }
 471
 472 /*****************************************************************************
 473  * vout_Destroy: destroys a previously created video output
 474  *****************************************************************************
 475  * Destroy a terminated thread.
 476  * The function will request a destruction of the specified thread. If pi_error
 477  * is NULL, it will return once the thread is destroyed. Else, it will be
 478  * update using one of the THREAD_* constants.
 479  *****************************************************************************/
 480 void vout_Destroy( vout_thread_t *p_vout )
 481 {
 482     vlc_object_t *p_playlist;
 483
 484     /* Request thread destruction */
 485     p_vout->b_die = VLC_TRUE;
 486     vlc_thread_join( p_vout );
 487
 488     var_Destroy( p_vout, "intf-change" );
 489
 490     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 491                                   FIND_ANYWHERE );
 492
 493     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 494
 495     /* Free structure */
 496     vlc_object_destroy( p_vout );
 497
 498     /* If it was the last vout, tell the interface to show up */
 499     if( p_playlist != NULL )
 500     {
 501         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 502                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 503         if( p_another_vout == NULL )
 504         {
 505             vlc_value_t val;
 506             val.b_bool = VLC_TRUE;
 507             var_Set( p_playlist, "intf-show", val );
 508         }
 509         else
 510         {
 511             vlc_object_release( p_another_vout );
 512         }
 513         vlc_object_release( p_playlist );
 514     }
 515 }
 516
 517 /*****************************************************************************
 518  * InitThread: initialize video output thread
 519  *****************************************************************************
 520  * This function is called from RunThread and performs the second step of the
 521  * initialization. It returns 0 on success. Note that the thread's flag are not
 522  * modified inside this function.
 523  *****************************************************************************/
 524 static int InitThread( vout_thread_t *p_vout )
 525 {
 526     int i, i_aspect_x, i_aspect_y;
 527
 528     vlc_mutex_lock( &p_vout->change_lock );
 529
 530 #ifdef STATS
 531     p_vout->c_loops = 0;
 532 #endif
 533
 534     /* Initialize output method, it allocates direct buffers for us */
 535     if( p_vout->pf_init( p_vout ) )
 536     {
 537         vlc_mutex_unlock( &p_vout->change_lock );
 538         return VLC_EGENERIC;
 539     }
 540
 541     if( !I_OUTPUTPICTURES )
 542     {
 543         msg_Err( p_vout, "plugin was unable to allocate at least "
 544                          "one direct buffer" );
 545         p_vout->pf_end( p_vout );
 546         vlc_mutex_unlock( &p_vout->change_lock );
 547         return VLC_EGENERIC;
 548     }
 549
 550     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 551     {
 552         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 553                          "our internal buffers must have overflown." );
 554         p_vout->pf_end( p_vout );
 555         vlc_mutex_unlock( &p_vout->change_lock );
 556         return VLC_EGENERIC;
 557     }
 558
 559     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 560
 561     AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 562     msg_Dbg( p_vout,
 563              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 564              p_vout->render.i_width, p_vout->render.i_height,
 565              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 566              i_aspect_x, i_aspect_y );
 567
 568     AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 569     msg_Dbg( p_vout,
 570              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 571              p_vout->output.i_width, p_vout->output.i_height,
 572              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 573              i_aspect_x, i_aspect_y );
 574
 575     /* Calculate shifts from system-updated masks */
 576     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 577                  p_vout->output.i_rmask );
 578     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 579                  p_vout->output.i_gmask );
 580     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 581                  p_vout->output.i_bmask );
 582
 583     /* Check whether we managed to create direct buffers similar to
 584      * the render buffers, ie same size and chroma */
 585     if( ( p_vout->output.i_width == p_vout->render.i_width )
 586      && ( p_vout->output.i_height == p_vout->render.i_height )
 587      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 588     {
 589         /* Cool ! We have direct buffers, we can ask the decoder to
 590          * directly decode into them ! Map the first render buffers to
 591          * the first direct buffers, but keep the first direct buffer
 592          * for memcpy operations */
 593         p_vout->b_direct = 1;
 594
 595         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 596         {
 597             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 598                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 599                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 600             {
 601                 /* We have enough direct buffers so there's no need to
 602                  * try to use system memory buffers. */
 603                 break;
 604             }
 605             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 606             I_RENDERPICTURES++;
 607         }
 608
 609         msg_Dbg( p_vout, "direct render, mapping "
 610                  "render pictures 0-%i to system pictures 1-%i",
 611                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 612     }
 613     else
 614     {
 615         /* Rats... Something is wrong here, we could not find an output
 616          * plugin able to directly render what we decode. See if we can
 617          * find a chroma plugin to do the conversion */
 618         p_vout->b_direct = 0;
 619
 620         /* Choose the best module */
 621         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 622
 623         if( p_vout->chroma.p_module == NULL )
 624         {
 625             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 626                      (char*)&p_vout->render.i_chroma,
 627                      (char*)&p_vout->output.i_chroma );
 628             p_vout->pf_end( p_vout );
 629             vlc_mutex_unlock( &p_vout->change_lock );
 630             return VLC_EGENERIC;
 631         }
 632
 633         msg_Dbg( p_vout, "indirect render, mapping "
 634                  "render pictures 0-%i to system pictures %i-%i",
 635                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 636                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 637
 638         /* Append render buffers after the direct buffers */
 639         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 640         {
 641             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 642             I_RENDERPICTURES++;
 643
 644             /* Check if we have enough render pictures */
 645             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 646                 break;
 647         }
 648     }
 649
 650     /* Link pictures back to their heap */
 651     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 652     {
 653         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 654     }
 655
 656     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 657     {
 658         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 659     }
 660
 661 /* XXX XXX mark thread ready */
 662     return VLC_SUCCESS;
 663 }
 664
 665 /*****************************************************************************
 666  * RunThread: video output thread
 667  *****************************************************************************
 668  * Video output thread. This function does only returns when the thread is
 669  * terminated. It handles the pictures arriving in the video heap and the
 670  * display device events.
 671  *****************************************************************************/
 672 static void RunThread( vout_thread_t *p_vout)
 673 {
 674     int             i_index;                                /* index in heap */
 675     int             i_idle_loops = 0;  /* loops without displaying a picture */
 676     mtime_t         current_date;                            /* current date */
 677     mtime_t         display_date;                            /* display date */
 678
 679     picture_t *     p_picture;                            /* picture pointer */
 680     picture_t *     p_last_picture = NULL;                   /* last picture */
 681     picture_t *     p_directbuffer;              /* direct buffer to display */
 682
 683     subpicture_t *  p_subpic;                          /* subpicture pointer */
 684
 685     /*
 686      * Initialize thread
 687      */
 688     p_vout->b_error = InitThread( p_vout );
 689
 690     /* signal the creation of the vout */
 691     vlc_thread_ready( p_vout );
 692
 693     if( p_vout->b_error )
 694     {
 695         /* Destroy thread structures allocated by Create and InitThread */
 696         DestroyThread( p_vout );
 697         return;
 698     }
 699
 700     /*
 701      * Main loop - it is not executed if an error occurred during
 702      * initialization
 703      */
 704     while( (!p_vout->b_die) && (!p_vout->b_error) )
 705     {
 706         /* Initialize loop variables */
 707         p_picture = NULL;
 708         display_date = 0;
 709         current_date = mdate();
 710
 711 #if 0
 712         p_vout->c_loops++;
 713         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 714         {
 715             msg_Dbg( p_vout, "picture heap: %d/%d",
 716                      I_RENDERPICTURES, p_vout->i_heap_size );
 717         }
 718 #endif
 719
 720         /*
 721          * Find the picture to display (the one with the earliest date).
 722          * This operation does not need lock, since only READY_PICTUREs
 723          * are handled. */
 724         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 725         {
 726             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 727                 && ( (p_picture == NULL) ||
 728                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 729             {
 730                 p_picture = PP_RENDERPICTURE[i_index];
 731                 display_date = p_picture->date;
 732             }
 733         }
 734
 735         if( p_picture )
 736         {
 737             /* If we met the last picture, parse again to see whether there is
 738              * a more appropriate one. */
 739             if( p_picture == p_last_picture )
 740             {
 741                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 742                 {
 743                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 744                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 745                         && ((p_picture == p_last_picture) ||
 746                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 747                     {
 748                         p_picture = PP_RENDERPICTURE[i_index];
 749                         display_date = p_picture->date;
 750                     }
 751                 }
 752             }
 753
 754             /* If we found better than the last picture, destroy it */
 755             if( p_last_picture && p_picture != p_last_picture )
 756             {
 757                 vlc_mutex_lock( &p_vout->picture_lock );
 758                 if( p_last_picture->i_refcount )
 759                 {
 760                     p_last_picture->i_status = DISPLAYED_PICTURE;
 761                 }
 762                 else
 763                 {
 764                     p_last_picture->i_status = DESTROYED_PICTURE;
 765                     p_vout->i_heap_size--;
 766                 }
 767                 vlc_mutex_unlock( &p_vout->picture_lock );
 768                 p_last_picture = NULL;
 769             }
 770
 771             /* Compute FPS rate */
 772             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 773                 = display_date;
 774
 775             if( !p_picture->b_force &&
 776                 p_picture != p_last_picture &&
 777                 display_date < current_date + p_vout->render_time )
 778             {
 779                 /* Picture is late: it will be destroyed and the thread
 780                  * will directly choose the next picture */
 781                 vlc_mutex_lock( &p_vout->picture_lock );
 782                 if( p_picture->i_refcount )
 783                 {
 784                     /* Pretend we displayed the picture, but don't destroy
 785                      * it since the decoder might still need it. */
 786                     p_picture->i_status = DISPLAYED_PICTURE;
 787                 }
 788                 else
 789                 {
 790                     /* Destroy the picture without displaying it */
 791                     p_picture->i_status = DESTROYED_PICTURE;
 792                     p_vout->i_heap_size--;
 793                 }
 794                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 795                                   current_date - display_date );
 796                 vlc_mutex_unlock( &p_vout->picture_lock );
 797
 798                 continue;
 799             }
 800
 801             if( display_date >
 802                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 803             {
 804                 /* Picture is waaay too early: it will be destroyed */
 805                 vlc_mutex_lock( &p_vout->picture_lock );
 806                 if( p_picture->i_refcount )
 807                 {
 808                     /* Pretend we displayed the picture, but don't destroy
 809                      * it since the decoder might still need it. */
 810                     p_picture->i_status = DISPLAYED_PICTURE;
 811                 }
 812                 else
 813                 {
 814                     /* Destroy the picture without displaying it */
 815                     p_picture->i_status = DESTROYED_PICTURE;
 816                     p_vout->i_heap_size--;
 817                 }
 818                 msg_Warn( p_vout, "vout warning: early picture skipped "
 819                           "("I64Fd")", display_date - current_date
 820                           - p_vout->i_pts_delay );
 821                 vlc_mutex_unlock( &p_vout->picture_lock );
 822
 823                 continue;
 824             }
 825
 826             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 827             {
 828                 /* A picture is ready to be rendered, but its rendering date
 829                  * is far from the current one so the thread will perform an
 830                  * empty loop as if no picture were found. The picture state
 831                  * is unchanged */
 832                 p_picture    = NULL;
 833                 display_date = 0;
 834             }
 835             else if( p_picture == p_last_picture )
 836             {
 837                 /* We are asked to repeat the previous picture, but we first
 838                  * wait for a couple of idle loops */
 839                 if( i_idle_loops < 4 )
 840                 {
 841                     p_picture    = NULL;
 842                     display_date = 0;
 843                 }
 844                 else
 845                 {
 846                     /* We set the display date to something high, otherwise
 847                      * we'll have lots of problems with late pictures */
 848                     display_date = current_date + p_vout->render_time;
 849                 }
 850             }
 851         }
 852
 853         if( p_picture == NULL )
 854         {
 855             i_idle_loops++;
 856         }
 857
 858         if( p_picture && p_vout->b_snapshot )
 859         {
 860             p_vout->b_snapshot = VLC_FALSE;
 861             vout_Snapshot( p_vout, p_picture );
 862         }
 863
 864         /*
 865          * Check for subpictures to display
 866          */
 867         p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 868
 869         /*
 870          * Perform rendering
 871          */
 872         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 873
 874         /*
 875          * Call the plugin-specific rendering method if there is one
 876          */
 877         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 878         {
 879             /* Render the direct buffer returned by vout_RenderPicture */
 880             p_vout->pf_render( p_vout, p_directbuffer );
 881         }
 882
 883         /*
 884          * Sleep, wake up
 885          */
 886         if( display_date != 0 && p_directbuffer != NULL )
 887         {
 888             mtime_t current_render_time = mdate() - current_date;
 889             /* if render time is very large we don't include it in the mean */
 890             if( current_render_time < p_vout->render_time +
 891                 VOUT_DISPLAY_DELAY )
 892             {
 893                 /* Store render time using a sliding mean weighting to
 894                  * current value in a 3 to 1 ratio*/
 895                 p_vout->render_time *= 3;
 896                 p_vout->render_time += current_render_time;
 897                 p_vout->render_time >>= 2;
 898             }
 899         }
 900
 901         /* Give back change lock */
 902         vlc_mutex_unlock( &p_vout->change_lock );
 903
 904         /* Sleep a while or until a given date */
 905         if( display_date != 0 )
 906         {
 907             /* If there are filters in the chain, better give them the picture
 908              * in advance */
 909             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 910             {
 911                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 912             }
 913         }
 914         else
 915         {
 916             msleep( VOUT_IDLE_SLEEP );
 917         }
 918
 919         /* On awakening, take back lock and send immediately picture
 920          * to display. */
 921         vlc_mutex_lock( &p_vout->change_lock );
 922
 923         /*
 924          * Display the previously rendered picture
 925          */
 926         if( p_picture != NULL && p_directbuffer != NULL )
 927         {
 928             /* Display the direct buffer returned by vout_RenderPicture */
 929             if( p_vout->pf_display )
 930             {
 931                 p_vout->pf_display( p_vout, p_directbuffer );
 932             }
 933
 934             /* Tell the vout this was the last picture and that it does not
 935              * need to be forced anymore. */
 936             p_last_picture = p_picture;
 937             p_last_picture->b_force = 0;
 938         }
 939
 940         if( p_picture != NULL )
 941         {
 942             /* Reinitialize idle loop count */
 943             i_idle_loops = 0;
 944         }
 945
 946         /*
 947          * Check events and manage thread
 948          */
 949         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 950         {
 951             /* A fatal error occurred, and the thread must terminate
 952              * immediately, without displaying anything - setting b_error to 1
 953              * causes the immediate end of the main while() loop. */
 954             p_vout->b_error = 1;
 955         }
 956
 957         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 958         {
 959             /* this must only happen when the vout plugin is incapable of
 960              * rescaling the picture itself. In this case we need to destroy
 961              * the current picture buffers and recreate new ones with the right
 962              * dimensions */
 963             int i;
 964
 965             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 966
 967             p_vout->pf_end( p_vout );
 968             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 969                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 970
 971             I_OUTPUTPICTURES = 0;
 972             if( p_vout->pf_init( p_vout ) )
 973             {
 974                 msg_Err( p_vout, "cannot resize display" );
 975                 /* FIXME: pf_end will be called again in EndThread() */
 976                 p_vout->b_error = 1;
 977             }
 978
 979             /* Need to reinitialise the chroma plugin */
 980             if( p_vout->chroma.p_module )
 981             {
 982                 if( p_vout->chroma.p_module->pf_deactivate )
 983                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
 984                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
 985             }
 986         }
 987
 988         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
 989         {
 990             /* This happens when the picture buffers need to be recreated.
 991              * This is useful on multimonitor displays for instance.
 992              *
 993              * Warning: This only works when the vout creates only 1 picture
 994              * buffer!! */
 995             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
 996
 997             if( !p_vout->b_direct )
 998             {
 999                 module_Unneed( p_vout, p_vout->chroma.p_module );
1000             }
1001
1002             vlc_mutex_lock( &p_vout->picture_lock );
1003
1004             p_vout->pf_end( p_vout );
1005
1006             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1007
1008             p_vout->b_error = InitThread( p_vout );
1009
1010             vlc_mutex_unlock( &p_vout->picture_lock );
1011         }
1012     }
1013
1014     /*
1015      * Error loop - wait until the thread destruction is requested
1016      */
1017     if( p_vout->b_error )
1018     {
1019         ErrorThread( p_vout );
1020     }
1021
1022     /* End of thread */
1023     EndThread( p_vout );
1024
1025     /* Destroy thread structures allocated by CreateThread */
1026     DestroyThread( p_vout );
1027 }
1028
1029 /*****************************************************************************
1030  * ErrorThread: RunThread() error loop
1031  *****************************************************************************
1032  * This function is called when an error occurred during thread main's loop.
1033  * The thread can still receive feed, but must be ready to terminate as soon
1034  * as possible.
1035  *****************************************************************************/
1036 static void ErrorThread( vout_thread_t *p_vout )
1037 {
1038     /* Wait until a `die' order */
1039     while( !p_vout->b_die )
1040     {
1041         /* Sleep a while */
1042         msleep( VOUT_IDLE_SLEEP );
1043     }
1044 }
1045
1046 /*****************************************************************************
1047  * EndThread: thread destruction
1048  *****************************************************************************
1049  * This function is called when the thread ends after a sucessful
1050  * initialization. It frees all resources allocated by InitThread.
1051  *****************************************************************************/
1052 static void EndThread( vout_thread_t *p_vout )
1053 {
1054     int     i_index;                                        /* index in heap */
1055
1056 #ifdef STATS
1057     {
1058         struct tms cpu_usage;
1059         times( &cpu_usage );
1060
1061         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1062                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1063     }
1064 #endif
1065
1066     if( !p_vout->b_direct )
1067     {
1068         module_Unneed( p_vout, p_vout->chroma.p_module );
1069     }
1070
1071     /* Destroy all remaining pictures */
1072     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1073     {
1074         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1075         {
1076             free( p_vout->p_picture[i_index].p_data_orig );
1077         }
1078     }
1079
1080     /* Destroy subpicture unit */
1081     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1082     spu_Destroy( p_vout->p_spu );
1083
1084     /* Destroy translation tables */
1085     p_vout->pf_end( p_vout );
1086
1087     /* Release the change lock */
1088     vlc_mutex_unlock( &p_vout->change_lock );
1089 }
1090
1091 /*****************************************************************************
1092  * DestroyThread: thread destruction
1093  *****************************************************************************
1094  * This function is called when the thread ends. It frees all ressources
1095  * allocated by CreateThread. Status is available at this stage.
1096  *****************************************************************************/
1097 static void DestroyThread( vout_thread_t *p_vout )
1098 {
1099     /* Destroy the locks */
1100     vlc_mutex_destroy( &p_vout->picture_lock );
1101     vlc_mutex_destroy( &p_vout->change_lock );
1102
1103     /* Release the module */
1104     if( p_vout && p_vout->p_module )
1105     {
1106         module_Unneed( p_vout, p_vout->p_module );
1107     }
1108 }
1109
1110 /* following functions are local */
1111
1112 static int ReduceHeight( int i_ratio )
1113 {
1114     int i_dummy = VOUT_ASPECT_FACTOR;
1115     int i_pgcd  = 1;
1116
1117     if( !i_ratio )
1118     {
1119         return i_pgcd;
1120     }
1121
1122     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1123     while( !(i_ratio & 1) && !(i_dummy & 1) )
1124     {
1125         i_ratio >>= 1;
1126         i_dummy >>= 1;
1127         i_pgcd  <<= 1;
1128     }
1129
1130     while( !(i_ratio % 3) && !(i_dummy % 3) )
1131     {
1132         i_ratio /= 3;
1133         i_dummy /= 3;
1134         i_pgcd  *= 3;
1135     }
1136
1137     while( !(i_ratio % 5) && !(i_dummy % 5) )
1138     {
1139         i_ratio /= 5;
1140         i_dummy /= 5;
1141         i_pgcd  *= 5;
1142     }
1143
1144     return i_pgcd;
1145 }
1146
1147 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1148 {
1149     unsigned int i_pgcd = ReduceHeight( i_aspect );
1150     *i_aspect_x = i_aspect / i_pgcd;
1151     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1152 }
1153
1154 /*****************************************************************************
1155  * BinaryLog: computes the base 2 log of a binary value
1156  *****************************************************************************
1157  * This functions is used by MaskToShift, to get a bit index from a binary
1158  * value.
1159  *****************************************************************************/
1160 static int BinaryLog( uint32_t i )
1161 {
1162     int i_log = 0;
1163
1164     if( i == 0 ) return -31337;
1165
1166     if( i & 0xffff0000 ) i_log += 16;
1167     if( i & 0xff00ff00 ) i_log += 8;
1168     if( i & 0xf0f0f0f0 ) i_log += 4;
1169     if( i & 0xcccccccc ) i_log += 2;
1170     if( i & 0xaaaaaaaa ) i_log += 1;
1171
1172     return i_log;
1173 }
1174
1175 /*****************************************************************************
1176  * MaskToShift: transform a color mask into right and left shifts
1177  *****************************************************************************
1178  * This function is used for obtaining color shifts from masks.
1179  *****************************************************************************/
1180 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1181 {
1182     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1183
1184     if( !i_mask )
1185     {
1186         *pi_left = *pi_right = 0;
1187         return;
1188     }
1189
1190     /* Get bits */
1191     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1192     i_high = i_mask + i_low;                       /* higher bit of the mask */
1193
1194     /* Transform bits into an index */
1195     i_low =  BinaryLog (i_low);
1196     i_high = BinaryLog (i_high);
1197
1198     /* Update pointers and return */
1199     *pi_left =   i_low;
1200     *pi_right = (8 - i_high + i_low);
1201 }
1202
1203 /*****************************************************************************
1204  * InitWindowSize: find the initial dimensions the video window should have.
1205  *****************************************************************************
1206  * This function will check the "width", "height" and "zoom" config options and
1207  * will calculate the size that the video window should have.
1208  *****************************************************************************/
1209 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1210                             int *pi_height )
1211 {
1212     vlc_value_t val;
1213     int i_width, i_height;
1214     uint64_t ll_zoom;
1215
1216 #define FP_FACTOR 1000                             /* our fixed point factor */
1217
1218     var_Get( p_vout, "align", &val );
1219     p_vout->i_alignment = val.i_int;
1220
1221     var_Get( p_vout, "width", &val );
1222     i_width = val.i_int;
1223     var_Get( p_vout, "height", &val );
1224     i_height = val.i_int;
1225     var_Get( p_vout, "zoom", &val );
1226     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1227
1228     if( i_width > 0 && i_height > 0)
1229     {
1230         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1231         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1232         return;
1233     }
1234     else if( i_width > 0 )
1235     {
1236         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1237         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1238                             p_vout->render.i_aspect / FP_FACTOR );
1239         return;
1240     }
1241     else if( i_height > 0 )
1242     {
1243         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1244         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1245                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1246         return;
1247     }
1248
1249     if( p_vout->render.i_height * p_vout->render.i_aspect
1250         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1251     {
1252         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1253           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1254         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1255     }
1256     else
1257     {
1258         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1259         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1260           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1261     }
1262
1263 #undef FP_FACTOR
1264 }
1265
1266 /*****************************************************************************
1267  * vout_VarCallback: generic callback for intf variables
1268  *****************************************************************************/
1269 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1270                       vlc_value_t old_value, vlc_value_t new_value,
1271                       void * unused )
1272 {
1273     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1274     vlc_value_t val;
1275     val.b_bool = VLC_TRUE;
1276     var_Set( p_vout, "intf-change", val );
1277     return VLC_SUCCESS;
1278 }
1279
1280 /*****************************************************************************
1281  * Helper thread for object variables callbacks.
1282  * Only used to avoid deadlocks when using the video embedded mode.
1283  *****************************************************************************/
1284 typedef struct suxor_thread_t
1285 {
1286     VLC_COMMON_MEMBERS
1287     input_thread_t *p_input;
1288
1289 } suxor_thread_t;
1290
1291 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1292 {
1293     vlc_value_t val;
1294
1295     vlc_thread_ready( p_this );
1296
1297     /* Now restart current video stream */
1298     var_Get( p_this->p_input, "video-es", &val );
1299     if( val.i_int >= 0 )
1300     {
1301         vlc_value_t val_es;
1302         val_es.i_int = -VIDEO_ES;
1303         var_Set( p_this->p_input, "video-es", val_es );
1304         var_Set( p_this->p_input, "video-es", val );
1305     }
1306
1307     vlc_object_release( p_this->p_input );
1308
1309 #ifdef WIN32
1310     CloseHandle( p_this->thread_id );
1311 #endif
1312
1313     vlc_object_destroy( p_this );
1314 }
1315
1316 /*****************************************************************************
1317  * object variables callbacks: a bunch of object variables are used by the
1318  * interfaces to interact with the vout.
1319  *****************************************************************************/
1320 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1321                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1322 {
1323     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1324     input_thread_t *p_input;
1325     vlc_value_t val;
1326
1327     char *psz_mode = newval.psz_string;
1328     char *psz_filter, *psz_deinterlace = NULL;
1329
1330     var_Get( p_vout, "filter", &val );
1331     psz_filter = val.psz_string;
1332     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1333
1334     if( !psz_mode || !*psz_mode )
1335     {
1336         if( psz_deinterlace )
1337         {
1338             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1339             if( psz_src[0] == ',' ) psz_src++;
1340             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1341         }
1342     }
1343     else if( !psz_deinterlace )
1344     {
1345         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1346                               sizeof(",deinterlace") );
1347         if( psz_filter && *psz_filter ) strcat( psz_filter, "," );
1348         strcat( psz_filter, "deinterlace" );
1349     }
1350
1351     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1352                                                  FIND_PARENT );
1353     if( !p_input ) return VLC_EGENERIC;
1354
1355     if( psz_mode && *psz_mode )
1356     {
1357         /* Modify input as well because the vout might have to be restarted */
1358         val.psz_string = psz_mode;
1359         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1360         var_Set( p_input, "deinterlace-mode", val );
1361     }
1362     vlc_object_release( p_input );
1363
1364     val.b_bool = VLC_TRUE;
1365     var_Set( p_vout, "intf-change", val );
1366
1367     val.psz_string = psz_filter;
1368     var_Set( p_vout, "filter", val );
1369     if( psz_filter ) free( psz_filter );
1370
1371     return VLC_SUCCESS;
1372 }
1373
1374 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1375                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1376 {
1377     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1378     input_thread_t *p_input;
1379     vlc_value_t val;
1380
1381     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1382                                                  FIND_PARENT );
1383     if (!p_input)
1384     {
1385         msg_Err( p_vout, "Input not found" );
1386         return( VLC_EGENERIC );
1387     }
1388
1389     val.b_bool = VLC_TRUE;
1390     var_Set( p_vout, "intf-change", val );
1391
1392     /* Modify input as well because the vout might have to be restarted */
1393     val.psz_string = newval.psz_string;
1394     var_Create( p_input, "filter", VLC_VAR_STRING );
1395     var_Set( p_input, "filter", val );
1396
1397     /* Now restart current video stream */
1398     var_Get( p_input, "video-es", &val );
1399     if( val.i_int >= 0 )
1400     {
1401         suxor_thread_t *p_suxor =
1402             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1403         p_suxor->p_input = p_input;
1404         p_vout->b_filter_change = VLC_TRUE;
1405         vlc_object_yield( p_input );
1406         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1407                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1408     }
1409
1410     vlc_object_release( p_input );
1411
1412     return VLC_SUCCESS;
1413 }