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

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  * This module describes the programming interface for video output threads.
   4  * It includes functions allowing to open a new thread, send pictures to a
   5  * thread, and destroy a previously oppened video output thread.
   6  *****************************************************************************
   7  * Copyright (C) 2000-2001 VideoLAN
   8  * $Id: video_output.c,v 1.229 2003/07/14 21:32:59 sigmunau Exp $
   9  *
  10  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include <stdlib.h>                                                /* free() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #ifdef HAVE_SYS_TIMES_H
  35 #   include <sys/times.h>
  36 #endif
  37
  38 #include "vlc_video.h"
  39 #include "video_output.h"
  40 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  41
  42 #if defined( SYS_DARWIN )
  43 #include "darwin_specific.h"
  44 #endif
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int      InitThread        ( vout_thread_t * );
  50 static void     RunThread         ( vout_thread_t * );
  51 static void     ErrorThread       ( vout_thread_t * );
  52 static void     EndThread         ( vout_thread_t * );
  53 static void     DestroyThread     ( vout_thread_t * );
  54
  55 static int      ReduceHeight      ( int );
  56 static int      BinaryLog         ( uint32_t );
  57 static void     MaskToShift       ( int *, int *, uint32_t );
  58 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  59
  60 /* Object variables callbacks */
  61 static int FullscreenCallback( vlc_object_t *, char const *,
  62                                vlc_value_t, vlc_value_t, void * );
  63 static int DeinterlaceCallback( vlc_object_t *, char const *,
  64                                 vlc_value_t, vlc_value_t, void * );
  65
  66 /*****************************************************************************
  67  * vout_Request: find a video output thread, create one, or destroy one.
  68  *****************************************************************************
  69  * This function looks for a video output thread matching the current
  70  * properties. If not found, it spawns a new one.
  71  *****************************************************************************/
  72 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  73                                  unsigned int i_width, unsigned int i_height,
  74                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  75 {
  76     if( !i_width || !i_height || !i_chroma )
  77     {
  78         /* Reattach video output to input before bailing out */
  79         if( p_vout )
  80         {
  81             vlc_object_t *p_input;
  82
  83             p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
  84
  85             if( p_input )
  86             {
  87                 vlc_object_detach( p_vout );
  88                 vlc_object_attach( p_vout, p_input );
  89
  90                 vlc_object_release( p_input );
  91             }
  92             else
  93             {
  94                 vlc_object_detach( p_vout );
  95                 /* vlc_object_release( p_vout ); */
  96                 vout_Destroy( p_vout );
  97             }
  98         }
  99         return NULL;
 100     }
 101
 102     /* If a video output was provided, lock it, otherwise look for one. */
 103     if( p_vout )
 104     {
 105         vlc_object_yield( p_vout );
 106     }
 107     else
 108     {
 109         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 110
 111         if( !p_vout )
 112         {
 113             vlc_object_t *p_input;
 114
 115             p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 116             if( p_input )
 117             {
 118                 p_vout = vlc_object_find( p_input, VLC_OBJECT_VOUT,
 119                                           FIND_CHILD );
 120                 /* only first children of p_input for unused vout */
 121                 if( p_vout && p_vout->p_parent != p_input )
 122                 {
 123                     vlc_object_release( p_vout );
 124                     p_vout = NULL;
 125                 }
 126                 vlc_object_release( p_input );
 127             }
 128         }
 129     }
 130
 131     /* If we now have a video output, check it has the right properties */
 132     if( p_vout )
 133     {
 134         char *psz_filter_chain;
 135
 136         /* We don't directly check for the "filter" variable for obvious
 137          * performance reasons. */
 138         if( p_vout->b_filter_change )
 139         {
 140             psz_filter_chain = config_GetPsz( p_this, "filter" );
 141
 142             if( psz_filter_chain && !*psz_filter_chain )
 143             {
 144                 free( psz_filter_chain );
 145                 psz_filter_chain = NULL;
 146             }
 147             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 148             {
 149                 free( p_vout->psz_filter_chain );
 150                 p_vout->psz_filter_chain = NULL;
 151             }
 152
 153             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 154                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 155                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 156             {
 157                 p_vout->b_filter_change = VLC_FALSE;
 158             }
 159
 160             if( psz_filter_chain ) free( psz_filter_chain );
 161         }
 162
 163         if( ( p_vout->render.i_width != i_width ) ||
 164             ( p_vout->render.i_height != i_height ) ||
 165             ( p_vout->render.i_chroma != i_chroma ) ||
 166             ( p_vout->render.i_aspect != i_aspect
 167                     && !p_vout->b_override_aspect ) ||
 168             p_vout->b_filter_change )
 169         {
 170             /* We are not interested in this format, close this vout */
 171             vlc_object_detach( p_vout );
 172             vlc_object_release( p_vout );
 173             vout_Destroy( p_vout );
 174             p_vout = NULL;
 175         }
 176         else
 177         {
 178             /* This video output is cool! Hijack it. */
 179             vlc_object_detach( p_vout );
 180             vlc_object_attach( p_vout, p_this );
 181             vlc_object_release( p_vout );
 182         }
 183     }
 184
 185     if( !p_vout )
 186     {
 187         msg_Dbg( p_this, "no usable vout present, spawning one" );
 188
 189         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 190     }
 191
 192     return p_vout;
 193 }
 194
 195 /*****************************************************************************
 196  * vout_Create: creates a new video output thread
 197  *****************************************************************************
 198  * This function creates a new video output thread, and returns a pointer
 199  * to its description. On error, it returns NULL.
 200  *****************************************************************************/
 201 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 202                                unsigned int i_width, unsigned int i_height,
 203                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 204 {
 205     vout_thread_t  * p_vout;                            /* thread descriptor */
 206     input_thread_t * p_input_thread;
 207     int              i_index;                               /* loop variable */
 208     char           * psz_plugin;
 209     vlc_value_t      val, text;
 210
 211     /* Allocate descriptor */
 212     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 213     if( p_vout == NULL )
 214     {
 215         msg_Err( p_parent, "out of memory" );
 216         return NULL;
 217     }
 218
 219     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 220     val.b_bool = VLC_TRUE;
 221     var_Set( p_vout, "intf-change", val );
 222
 223     p_vout->b_override_aspect = VLC_FALSE;
 224
 225     /* If the parent is not a VOUT object, that means we are at the start of
 226      * the video output pipe */
 227     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 228     {
 229         char *psz_aspect = config_GetPsz( p_parent, "aspect-ratio" );
 230
 231         /* Check whether the user tried to override aspect ratio */
 232         if( psz_aspect )
 233         {
 234             unsigned int i_new_aspect = i_aspect;
 235             char *psz_parser = strchr( psz_aspect, ':' );
 236
 237             if( psz_parser )
 238             {
 239                 *psz_parser++ = '\0';
 240                 i_new_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR
 241                                                   / atoi( psz_parser );
 242             }
 243             else
 244             {
 245                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 246                                        * atof( psz_aspect )
 247                                        / i_height;
 248             }
 249
 250             free( psz_aspect );
 251
 252             if( i_new_aspect && i_new_aspect != i_aspect )
 253             {
 254                 int i_pgcd = ReduceHeight( i_new_aspect );
 255
 256                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 257                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 258
 259                 i_aspect = i_new_aspect;
 260
 261                 p_vout->b_override_aspect = VLC_TRUE;
 262             }
 263         }
 264
 265         /* Look for the default filter configuration */
 266         p_vout->psz_filter_chain = config_GetPsz( p_parent, "filter" );
 267     }
 268     else
 269     {
 270         /* continue the parent's filter chain */
 271         char *psz_end;
 272
 273         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 274         if( psz_end && *(psz_end+1) )
 275             p_vout->psz_filter_chain = strdup( psz_end+1 );
 276         else p_vout->psz_filter_chain = NULL;
 277     }
 278
 279     /* Choose the video output module */
 280     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 281     {
 282         psz_plugin = config_GetPsz( p_parent, "vout" );
 283     }
 284     else
 285     {
 286         /* the filter chain is a string list of filters separated by double
 287          * colons */
 288         char *psz_end;
 289
 290         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 291         if( psz_end )
 292             psz_plugin = strndup( p_vout->psz_filter_chain,
 293                                   psz_end - p_vout->psz_filter_chain );
 294         else psz_plugin = strdup( p_vout->psz_filter_chain );
 295     }
 296
 297     /* Initialize pictures and subpictures - translation tables and functions
 298      * will be initialized later in InitThread */
 299     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
 300     {
 301         p_vout->p_picture[i_index].pf_lock = NULL;
 302         p_vout->p_picture[i_index].pf_unlock = NULL;
 303         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 304         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 305     }
 306
 307     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 308     {
 309         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 310         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 311     }
 312
 313     /* No images in the heap */
 314     p_vout->i_heap_size = 0;
 315
 316     /* Initialize the rendering heap */
 317     I_RENDERPICTURES = 0;
 318     p_vout->render.i_width    = i_width;
 319     p_vout->render.i_height   = i_height;
 320     p_vout->render.i_chroma   = i_chroma;
 321     p_vout->render.i_aspect   = i_aspect;
 322
 323     p_vout->render.i_rmask    = 0;
 324     p_vout->render.i_gmask    = 0;
 325     p_vout->render.i_bmask    = 0;
 326
 327     p_vout->render.i_last_used_pic = -1;
 328     p_vout->render.b_allow_modify_pics = 1;
 329
 330     /* Zero the output heap */
 331     I_OUTPUTPICTURES = 0;
 332     p_vout->output.i_width    = 0;
 333     p_vout->output.i_height   = 0;
 334     p_vout->output.i_chroma   = 0;
 335     p_vout->output.i_aspect   = 0;
 336
 337     p_vout->output.i_rmask    = 0;
 338     p_vout->output.i_gmask    = 0;
 339     p_vout->output.i_bmask    = 0;
 340
 341     /* Initialize misc stuff */
 342     p_vout->i_changes    = 0;
 343     p_vout->f_gamma      = 0;
 344     p_vout->b_grayscale  = 0;
 345     p_vout->b_info       = 0;
 346     p_vout->b_interface  = 0;
 347     p_vout->b_scale      = 1;
 348     p_vout->b_fullscreen = 0;
 349     p_vout->render_time  = 10;
 350     p_vout->c_fps_samples = 0;
 351     p_vout->b_filter_change = 0;
 352
 353     /* Mouse coordinates */
 354     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 355     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 356     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 357     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 358     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 359     var_Create( p_vout, "key-pressed", VLC_VAR_STRING );
 360
 361     /* Initialize the dimensions of the video window */
 362     InitWindowSize( p_vout, &p_vout->i_window_width,
 363                     &p_vout->i_window_height );
 364
 365     /* Create thread and set locks */
 366     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 367     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 368     vlc_mutex_init( p_vout, &p_vout->change_lock );
 369
 370     vlc_object_attach( p_vout, p_parent );
 371
 372     p_vout->p_module = module_Need( p_vout,
 373                            ( p_vout->psz_filter_chain &&
 374                                *p_vout->psz_filter_chain ) ?
 375                            "video filter" : "video output",
 376                            psz_plugin );
 377
 378     if( psz_plugin ) free( psz_plugin );
 379     if( p_vout->p_module == NULL )
 380     {
 381         msg_Err( p_vout, "no suitable vout module" );
 382         vlc_object_destroy( p_vout );
 383         return NULL;
 384     }
 385     p_vout->p_text_renderer_module = module_Need( p_vout, "text renderer",
 386                                                   NULL );
 387     if( p_vout->p_text_renderer_module == NULL )
 388     {
 389         msg_Warn( p_vout, "no suitable text renderer module" );
 390         p_vout->pf_add_string = NULL;
 391     }
 392     /* Create a few object variables for interface interaction */
 393     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
 394     text.psz_string = _("Fullscreen");
 395     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 396     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
 397     if( val.b_bool )
 398     {
 399         /* user requested fullscreen */
 400         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 401     }
 402     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 403
 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     }
 423     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 424
 425     /* Calculate delay created by internal caching */
 426     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 427                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 428     if( p_input_thread )
 429     {
 430         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 431         vlc_object_release( p_input_thread );
 432     }
 433     else
 434     {
 435         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 436     }
 437
 438     if( vlc_thread_create( p_vout, "video output", RunThread,
 439                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 440     {
 441         msg_Err( p_vout, "out of memory" );
 442         module_Unneed( p_vout, p_vout->p_module );
 443         vlc_object_destroy( p_vout );
 444         return NULL;
 445     }
 446
 447     return p_vout;
 448 }
 449
 450 /*****************************************************************************
 451  * vout_Destroy: destroys a previously created video output
 452  *****************************************************************************
 453  * Destroy a terminated thread.
 454  * The function will request a destruction of the specified thread. If pi_error
 455  * is NULL, it will return once the thread is destroyed. Else, it will be
 456  * update using one of the THREAD_* constants.
 457  *****************************************************************************/
 458 void vout_Destroy( vout_thread_t *p_vout )
 459 {
 460     vlc_object_t *p_playlist;
 461
 462     /* Request thread destruction */
 463     p_vout->b_die = VLC_TRUE;
 464     vlc_thread_join( p_vout );
 465
 466     var_Destroy( p_vout, "intf-change" );
 467
 468     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 469                                   FIND_ANYWHERE );
 470
 471     /* Free structure */
 472     vlc_object_destroy( p_vout );
 473
 474     /* If it was the last vout, tell the interface to show up */
 475     if( p_playlist != NULL )
 476     {
 477         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 478                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 479         if( p_another_vout == NULL )
 480         {
 481             vlc_value_t val;
 482             val.b_bool = VLC_TRUE;
 483             var_Set( p_playlist, "intf-show", val );
 484         }
 485         else
 486         {
 487             vlc_object_release( p_another_vout );
 488         }
 489         vlc_object_release( p_playlist );
 490     }
 491 }
 492
 493 /*****************************************************************************
 494  * InitThread: initialize video output thread
 495  *****************************************************************************
 496  * This function is called from RunThread and performs the second step of the
 497  * initialization. It returns 0 on success. Note that the thread's flag are not
 498  * modified inside this function.
 499  *****************************************************************************/
 500 static int InitThread( vout_thread_t *p_vout )
 501 {
 502     int i, i_pgcd;
 503
 504     vlc_mutex_lock( &p_vout->change_lock );
 505
 506 #ifdef STATS
 507     p_vout->c_loops = 0;
 508 #endif
 509
 510     /* Initialize output method, it allocates direct buffers for us */
 511     if( p_vout->pf_init( p_vout ) )
 512     {
 513         vlc_mutex_unlock( &p_vout->change_lock );
 514         return VLC_EGENERIC;
 515     }
 516
 517     if( !I_OUTPUTPICTURES )
 518     {
 519         msg_Err( p_vout, "plugin was unable to allocate at least "
 520                          "one direct buffer" );
 521         p_vout->pf_end( p_vout );
 522         vlc_mutex_unlock( &p_vout->change_lock );
 523         return VLC_EGENERIC;
 524     }
 525
 526     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 527     {
 528         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 529                          "our internal buffers must have overflown." );
 530         p_vout->pf_end( p_vout );
 531         vlc_mutex_unlock( &p_vout->change_lock );
 532         return VLC_EGENERIC;
 533     }
 534
 535     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 536
 537 #if 0
 538     if( !p_vout->psz_filter_chain )
 539     {
 540         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 541
 542         if( psz_aspect )
 543         {
 544             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 545                                                       * atof( psz_aspect )
 546                                                       / p_vout->output.i_height;
 547             free( psz_aspect );
 548
 549             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 550             {
 551                 int i_pgcd = ReduceHeight( i_new_aspect );
 552                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 553                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 554                 p_vout->output.i_aspect = i_new_aspect;
 555             }
 556         }
 557     }
 558 #endif
 559
 560     i_pgcd = ReduceHeight( p_vout->render.i_aspect );
 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              p_vout->render.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 566
 567     i_pgcd = ReduceHeight( p_vout->output.i_aspect );
 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              p_vout->output.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 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 );
 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 occured 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 = vout_SortSubPictures( p_vout, 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             /* Store render time using a sliding mean */
 882             p_vout->render_time += mdate() - current_date;
 883             p_vout->render_time >>= 1;
 884         }
 885
 886         /* Give back change lock */
 887         vlc_mutex_unlock( &p_vout->change_lock );
 888
 889         /* Sleep a while or until a given date */
 890         if( display_date != 0 )
 891         {
 892             mwait( display_date - VOUT_MWAIT_TOLERANCE );
 893         }
 894         else
 895         {
 896             msleep( VOUT_IDLE_SLEEP );
 897         }
 898
 899         /* On awakening, take back lock and send immediately picture
 900          * to display. */
 901         vlc_mutex_lock( &p_vout->change_lock );
 902
 903         /*
 904          * Display the previously rendered picture
 905          */
 906         if( p_picture != NULL && p_directbuffer != NULL )
 907         {
 908             /* Display the direct buffer returned by vout_RenderPicture */
 909             if( p_vout->pf_display )
 910             {
 911                 p_vout->pf_display( p_vout, p_directbuffer );
 912             }
 913
 914             /* Reinitialize idle loop count */
 915             i_idle_loops = 0;
 916
 917             /* Tell the vout this was the last picture and that it does not
 918              * need to be forced anymore. */
 919             p_last_picture = p_picture;
 920             p_last_picture->b_force = 0;
 921         }
 922
 923         /*
 924          * Check events and manage thread
 925          */
 926         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 927         {
 928             /* A fatal error occured, and the thread must terminate
 929              * immediately, without displaying anything - setting b_error to 1
 930              * causes the immediate end of the main while() loop. */
 931             p_vout->b_error = 1;
 932         }
 933
 934         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 935         {
 936             /* this must only happen when the vout plugin is incapable of
 937              * rescaling the picture itself. In this case we need to destroy
 938              * the current picture buffers and recreate new ones with the right
 939              * dimensions */
 940             int i;
 941
 942             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 943
 944             p_vout->pf_end( p_vout );
 945             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 946                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 947
 948             I_OUTPUTPICTURES = 0;
 949             if( p_vout->pf_init( p_vout ) )
 950             {
 951                 msg_Err( p_vout, "cannot resize display" );
 952                 /* FIXME: pf_end will be called again in EndThread() */
 953                 p_vout->b_error = 1;
 954             }
 955
 956             /* Need to reinitialise the chroma plugin */
 957             if( p_vout->chroma.p_module->pf_deactivate )
 958                 p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
 959             p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
 960         }
 961     }
 962
 963     /*
 964      * Error loop - wait until the thread destruction is requested
 965      */
 966     if( p_vout->b_error )
 967     {
 968         ErrorThread( p_vout );
 969     }
 970
 971     /* End of thread */
 972     EndThread( p_vout );
 973
 974     /* Destroy thread structures allocated by CreateThread */
 975     DestroyThread( p_vout );
 976 }
 977
 978 /*****************************************************************************
 979  * ErrorThread: RunThread() error loop
 980  *****************************************************************************
 981  * This function is called when an error occured during thread main's loop. The
 982  * thread can still receive feed, but must be ready to terminate as soon as
 983  * possible.
 984  *****************************************************************************/
 985 static void ErrorThread( vout_thread_t *p_vout )
 986 {
 987     /* Wait until a `die' order */
 988     while( !p_vout->b_die )
 989     {
 990         /* Sleep a while */
 991         msleep( VOUT_IDLE_SLEEP );
 992     }
 993 }
 994
 995 /*****************************************************************************
 996  * EndThread: thread destruction
 997  *****************************************************************************
 998  * This function is called when the thread ends after a sucessful
 999  * initialization. It frees all ressources allocated by InitThread.
1000  *****************************************************************************/
1001 static void EndThread( vout_thread_t *p_vout )
1002 {
1003     int     i_index;                                        /* index in heap */
1004
1005 #ifdef STATS
1006     {
1007         struct tms cpu_usage;
1008         times( &cpu_usage );
1009
1010         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1011                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1012     }
1013 #endif
1014
1015     if( !p_vout->b_direct )
1016     {
1017         module_Unneed( p_vout, p_vout->chroma.p_module );
1018     }
1019
1020     /* Destroy all remaining pictures */
1021     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1022     {
1023         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1024         {
1025             free( p_vout->p_picture[i_index].p_data_orig );
1026         }
1027     }
1028
1029     /* Destroy all remaining subpictures */
1030     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1031     {
1032         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1033         {
1034             vout_DestroySubPicture( p_vout,
1035                                     &p_vout->p_subpicture[i_index] );
1036         }
1037     }
1038
1039     module_Unneed( p_vout, p_vout->p_text_renderer_module );
1040
1041     /* Destroy translation tables */
1042     p_vout->pf_end( p_vout );
1043
1044     /* Release the change lock */
1045     vlc_mutex_unlock( &p_vout->change_lock );
1046 }
1047
1048 /*****************************************************************************
1049  * DestroyThread: thread destruction
1050  *****************************************************************************
1051  * This function is called when the thread ends. It frees all ressources
1052  * allocated by CreateThread. Status is available at this stage.
1053  *****************************************************************************/
1054 static void DestroyThread( vout_thread_t *p_vout )
1055 {
1056     /* Destroy the locks */
1057     vlc_mutex_destroy( &p_vout->picture_lock );
1058     vlc_mutex_destroy( &p_vout->subpicture_lock );
1059     vlc_mutex_destroy( &p_vout->change_lock );
1060
1061     /* Release the module */
1062     module_Unneed( p_vout, p_vout->p_module );
1063 }
1064
1065 /* following functions are local */
1066
1067 static int ReduceHeight( int i_ratio )
1068 {
1069     int i_dummy = VOUT_ASPECT_FACTOR;
1070     int i_pgcd  = 1;
1071
1072     if( !i_ratio )
1073     {
1074         return i_pgcd;
1075     }
1076
1077     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1078     while( !(i_ratio & 1) && !(i_dummy & 1) )
1079     {
1080         i_ratio >>= 1;
1081         i_dummy >>= 1;
1082         i_pgcd  <<= 1;
1083     }
1084
1085     while( !(i_ratio % 3) && !(i_dummy % 3) )
1086     {
1087         i_ratio /= 3;
1088         i_dummy /= 3;
1089         i_pgcd  *= 3;
1090     }
1091
1092     while( !(i_ratio % 5) && !(i_dummy % 5) )
1093     {
1094         i_ratio /= 5;
1095         i_dummy /= 5;
1096         i_pgcd  *= 5;
1097     }
1098
1099     return i_pgcd;
1100 }
1101
1102 /*****************************************************************************
1103  * BinaryLog: computes the base 2 log of a binary value
1104  *****************************************************************************
1105  * This functions is used by MaskToShift, to get a bit index from a binary
1106  * value.
1107  *****************************************************************************/
1108 static int BinaryLog( uint32_t i )
1109 {
1110     int i_log = 0;
1111
1112     if( i == 0 ) return -31337;
1113
1114     if( i & 0xffff0000 ) i_log += 16;
1115     if( i & 0xff00ff00 ) i_log += 8;
1116     if( i & 0xf0f0f0f0 ) i_log += 4;
1117     if( i & 0xcccccccc ) i_log += 2;
1118     if( i & 0xaaaaaaaa ) i_log += 1;
1119
1120     return i_log;
1121 }
1122
1123 /*****************************************************************************
1124  * MaskToShift: transform a color mask into right and left shifts
1125  *****************************************************************************
1126  * This function is used for obtaining color shifts from masks.
1127  *****************************************************************************/
1128 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1129 {
1130     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1131
1132     if( !i_mask )
1133     {
1134         *pi_left = *pi_right = 0;
1135         return;
1136     }
1137
1138     /* Get bits */
1139     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1140     i_high = i_mask + i_low;                       /* higher bit of the mask */
1141
1142     /* Transform bits into an index */
1143     i_low =  BinaryLog (i_low);
1144     i_high = BinaryLog (i_high);
1145
1146     /* Update pointers and return */
1147     *pi_left =   i_low;
1148     *pi_right = (8 - i_high + i_low);
1149 }
1150
1151 /*****************************************************************************
1152  * InitWindowSize: find the initial dimensions the video window should have.
1153  *****************************************************************************
1154  * This function will check the "width", "height" and "zoom" config options and
1155  * will calculate the size that the video window should have.
1156  *****************************************************************************/
1157 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1158                             int *pi_height )
1159 {
1160     int i_width, i_height;
1161     uint64_t ll_zoom;
1162
1163 #define FP_FACTOR 1000                             /* our fixed point factor */
1164
1165     i_width = config_GetInt( p_vout, "width" );
1166     i_height = config_GetInt( p_vout, "height" );
1167     ll_zoom = (uint64_t)( FP_FACTOR * config_GetFloat( p_vout, "zoom" ) );
1168
1169     if( i_width > 0 && i_height > 0)
1170     {
1171         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1172         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1173         return;
1174     }
1175     else if( i_width > 0 )
1176     {
1177         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1178         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1179                             p_vout->render.i_aspect / FP_FACTOR );
1180         return;
1181     }
1182     else if( i_height > 0 )
1183     {
1184         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1185         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1186                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1187         return;
1188     }
1189
1190     if( p_vout->render.i_height * p_vout->render.i_aspect
1191         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1192     {
1193         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1194           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1195         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1196     }
1197     else
1198     {
1199         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1200         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1201           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1202     }
1203
1204 #undef FP_FACTOR
1205 }
1206
1207 /*****************************************************************************
1208  * vout_VarCallback: generic callback for intf variables
1209  *****************************************************************************/
1210 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1211                       vlc_value_t old_value, vlc_value_t new_value,
1212                       void * unused )
1213 {
1214     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1215     vlc_value_t val;
1216     val.b_bool = VLC_TRUE;
1217     var_Set( p_vout, "intf-change", val );
1218     return VLC_SUCCESS;
1219 }
1220
1221 /*****************************************************************************
1222  * object variables callbacks: a bunch of object variables are used by the
1223  * interfaces to interact with the vout.
1224  *****************************************************************************/
1225 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
1226                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1227 {
1228     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1229     input_thread_t *p_input;
1230     vlc_value_t val;
1231
1232     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
1233
1234     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1235                                                  FIND_PARENT );
1236     if( p_input )
1237     {
1238         /* Modify input as well because the vout might have to be restarted */
1239         var_Create( p_input, "fullscreen", VLC_VAR_BOOL );
1240         var_Set( p_input, "fullscreen", newval );
1241
1242         vlc_object_release( p_input );
1243     }
1244
1245     val.b_bool = VLC_TRUE;
1246     var_Set( p_vout, "intf-change", val );
1247     return VLC_SUCCESS;
1248 }
1249
1250 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1251                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1252 {
1253     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1254     input_thread_t *p_input;
1255     vlc_value_t val;
1256
1257     char *psz_mode = newval.psz_string;
1258     char *psz_filter;
1259     unsigned int  i;
1260
1261     psz_filter = config_GetPsz( p_vout, "filter" );
1262
1263     if( !psz_mode || !*psz_mode )
1264     {
1265         config_PutPsz( p_vout, "filter", "" );
1266     }
1267     else
1268     {
1269         if( !psz_filter || !*psz_filter )
1270         {
1271             config_PutPsz( p_vout, "filter", "deinterlace" );
1272         }
1273         else
1274         {
1275             if( strstr( psz_filter, "deinterlace" ) == NULL )
1276             {
1277                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1278                 strcat( psz_filter, ",deinterlace" );
1279             }
1280             config_PutPsz( p_vout, "filter", psz_filter );
1281         }
1282     }
1283
1284     if( psz_filter ) free( psz_filter );
1285
1286
1287     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1288                                                  FIND_PARENT );
1289     if( !p_input ) return VLC_EGENERIC;
1290
1291     if( psz_mode && *psz_mode )
1292     {
1293         val.psz_string = psz_mode;
1294         var_Set( p_vout, "deinterlace-mode", val );
1295         /* Modify input as well because the vout might have to be restarted */
1296         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1297         var_Set( p_input, "deinterlace-mode", val );
1298     }
1299
1300     /* now restart all video streams */
1301     vlc_mutex_lock( &p_input->stream.stream_lock );
1302
1303     p_vout->b_filter_change = VLC_TRUE;
1304
1305 #define ES p_input->stream.pp_es[i]
1306
1307     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1308     {
1309         if( ( ES->i_cat == VIDEO_ES ) && ES->p_decoder_fifo != NULL )
1310         {
1311             input_UnselectES( p_input, ES );
1312             input_SelectES( p_input, ES );
1313         }
1314 #undef ES
1315     }
1316     vlc_mutex_unlock( &p_input->stream.stream_lock );
1317
1318     vlc_object_release( p_input );
1319
1320     val.b_bool = VLC_TRUE;
1321     var_Set( p_vout, "intf-change", val );
1322     return VLC_SUCCESS;
1323 }