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 1.237 2003/10/05 23:03:35 gbazin 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_playlist;
  82
  83             p_playlist = vlc_object_find( p_this,
  84                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
  85
  86             if( p_playlist )
  87             {
  88                 vlc_object_detach( p_vout );
  89                 vlc_object_attach( p_vout, p_playlist );
  90
  91                 vlc_object_release( p_playlist );
  92             }
  93             else
  94             {
  95                 msg_Dbg( p_this, "cannot find playlist destroying vout" );
  96                 vlc_object_detach( p_vout );
  97                 vout_Destroy( p_vout );
  98             }
  99         }
 100         return NULL;
 101     }
 102
 103     /* If a video output was provided, lock it, otherwise look for one. */
 104     if( p_vout )
 105     {
 106         vlc_object_yield( p_vout );
 107     }
 108     else
 109     {
 110         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 111
 112         if( !p_vout )
 113         {
 114             vlc_object_t *p_playlist;
 115
 116             p_playlist = vlc_object_find( p_this,
 117                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 118             if( p_playlist )
 119             {
 120                 p_vout = vlc_object_find( p_playlist,
 121                                           VLC_OBJECT_VOUT, FIND_CHILD );
 122                 /* only first children of p_input for unused vout */
 123                 if( p_vout && p_vout->p_parent != p_playlist )
 124                 {
 125                     vlc_object_release( p_vout );
 126                     p_vout = NULL;
 127                 }
 128                 vlc_object_release( p_playlist );
 129             }
 130         }
 131     }
 132
 133     /* If we now have a video output, check it has the right properties */
 134     if( p_vout )
 135     {
 136         char *psz_filter_chain;
 137
 138         /* We don't directly check for the "filter" variable for obvious
 139          * performance reasons. */
 140         if( p_vout->b_filter_change )
 141         {
 142             psz_filter_chain = config_GetPsz( p_this, "filter" );
 143
 144             if( psz_filter_chain && !*psz_filter_chain )
 145             {
 146                 free( psz_filter_chain );
 147                 psz_filter_chain = NULL;
 148             }
 149             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 150             {
 151                 free( p_vout->psz_filter_chain );
 152                 p_vout->psz_filter_chain = NULL;
 153             }
 154
 155             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 156                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 157                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 158             {
 159                 p_vout->b_filter_change = VLC_FALSE;
 160             }
 161
 162             if( psz_filter_chain ) free( psz_filter_chain );
 163         }
 164
 165         if( ( p_vout->render.i_width != i_width ) ||
 166             ( p_vout->render.i_height != i_height ) ||
 167             ( p_vout->render.i_chroma != i_chroma ) ||
 168             ( p_vout->render.i_aspect != i_aspect
 169                     && !p_vout->b_override_aspect ) ||
 170             p_vout->b_filter_change )
 171         {
 172             /* We are not interested in this format, close this vout */
 173             vlc_object_detach( p_vout );
 174             vlc_object_release( p_vout );
 175             vout_Destroy( p_vout );
 176             p_vout = NULL;
 177         }
 178         else
 179         {
 180             /* This video output is cool! Hijack it. */
 181             vlc_object_detach( p_vout );
 182             vlc_object_attach( p_vout, p_this );
 183             vlc_object_release( p_vout );
 184         }
 185     }
 186
 187     if( !p_vout )
 188     {
 189         msg_Dbg( p_this, "no usable vout present, spawning one" );
 190
 191         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 192     }
 193
 194     return p_vout;
 195 }
 196
 197 /*****************************************************************************
 198  * vout_Create: creates a new video output thread
 199  *****************************************************************************
 200  * This function creates a new video output thread, and returns a pointer
 201  * to its description. On error, it returns NULL.
 202  *****************************************************************************/
 203 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 204                                unsigned int i_width, unsigned int i_height,
 205                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 206 {
 207     vout_thread_t  * p_vout;                            /* thread descriptor */
 208     input_thread_t * p_input_thread;
 209     int              i_index;                               /* loop variable */
 210     char           * psz_plugin;
 211     vlc_value_t      val, text;
 212
 213     /* Allocate descriptor */
 214     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 215     if( p_vout == NULL )
 216     {
 217         msg_Err( p_parent, "out of memory" );
 218         return NULL;
 219     }
 220
 221     /* Initialize pictures and subpictures - translation tables and functions
 222      * will be initialized later in InitThread */
 223     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
 224     {
 225         p_vout->p_picture[i_index].pf_lock = NULL;
 226         p_vout->p_picture[i_index].pf_unlock = NULL;
 227         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 228         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 229     }
 230
 231     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 232     {
 233         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 234         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 235     }
 236
 237     /* No images in the heap */
 238     p_vout->i_heap_size = 0;
 239
 240     /* Initialize the rendering heap */
 241     I_RENDERPICTURES = 0;
 242     p_vout->render.i_width    = i_width;
 243     p_vout->render.i_height   = i_height;
 244     p_vout->render.i_chroma   = i_chroma;
 245     p_vout->render.i_aspect   = i_aspect;
 246
 247     p_vout->render.i_rmask    = 0;
 248     p_vout->render.i_gmask    = 0;
 249     p_vout->render.i_bmask    = 0;
 250
 251     p_vout->render.i_last_used_pic = -1;
 252     p_vout->render.b_allow_modify_pics = 1;
 253
 254     /* Zero the output heap */
 255     I_OUTPUTPICTURES = 0;
 256     p_vout->output.i_width    = 0;
 257     p_vout->output.i_height   = 0;
 258     p_vout->output.i_chroma   = 0;
 259     p_vout->output.i_aspect   = 0;
 260
 261     p_vout->output.i_rmask    = 0;
 262     p_vout->output.i_gmask    = 0;
 263     p_vout->output.i_bmask    = 0;
 264
 265     /* Initialize misc stuff */
 266     p_vout->i_changes    = 0;
 267     p_vout->f_gamma      = 0;
 268     p_vout->b_grayscale  = 0;
 269     p_vout->b_info       = 0;
 270     p_vout->b_interface  = 0;
 271     p_vout->b_scale      = 1;
 272     p_vout->b_fullscreen = 0;
 273     p_vout->i_alignment  = 0;
 274     p_vout->render_time  = 10;
 275     p_vout->c_fps_samples = 0;
 276     p_vout->b_filter_change = 0;
 277
 278     /* Mouse coordinates */
 279     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 280     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 281     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 282     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 283     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 284     var_Create( p_vout, "key-pressed", VLC_VAR_STRING );
 285
 286     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 287     val.b_bool = VLC_TRUE;
 288     var_Set( p_vout, "intf-change", val );
 289
 290     /* Initialize locks */
 291     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 292     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 293     vlc_mutex_init( p_vout, &p_vout->change_lock );
 294
 295     /* Attach the new object now so we can use var inheritance below */
 296     vlc_object_attach( p_vout, p_parent );
 297
 298     /* Create a few object variables we'll need later on */
 299     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 300     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 301     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 302     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 303     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 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_pgcd = ReduceHeight( i_new_aspect );
 337
 338                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 339                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 340
 341                 p_vout->render.i_aspect = i_new_aspect;
 342
 343                 p_vout->b_override_aspect = VLC_TRUE;
 344             }
 345         }
 346
 347         /* Look for the default filter configuration */
 348         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 349         var_Get( p_vout, "filter", &val );
 350         p_vout->psz_filter_chain = val.psz_string;
 351     }
 352     else
 353     {
 354         /* continue the parent's filter chain */
 355         char *psz_end;
 356
 357         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 358         if( psz_end && *(psz_end+1) )
 359             p_vout->psz_filter_chain = strdup( psz_end+1 );
 360         else p_vout->psz_filter_chain = NULL;
 361     }
 362
 363     /* Choose the video output module */
 364     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 365     {
 366         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 367         var_Get( p_vout, "vout", &val );
 368         psz_plugin = val.psz_string;
 369     }
 370     else
 371     {
 372         /* the filter chain is a string list of filters separated by double
 373          * colons */
 374         char *psz_end;
 375
 376         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 377         if( psz_end )
 378             psz_plugin = strndup( p_vout->psz_filter_chain,
 379                                   psz_end - p_vout->psz_filter_chain );
 380         else psz_plugin = strdup( p_vout->psz_filter_chain );
 381     }
 382
 383     /* Initialize the dimensions of the video window */
 384     InitWindowSize( p_vout, &p_vout->i_window_width,
 385                     &p_vout->i_window_height );
 386
 387     /* Create the vout thread */
 388     p_vout->p_module = module_Need( p_vout,
 389                            ( p_vout->psz_filter_chain &&
 390                                *p_vout->psz_filter_chain ) ?
 391                            "video filter" : "video output",
 392                            psz_plugin );
 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_destroy( p_vout );
 399         return NULL;
 400     }
 401
 402     p_vout->p_text_renderer_module = module_Need( p_vout, "text renderer",
 403                                                   NULL );
 404     if( p_vout->p_text_renderer_module == NULL )
 405     {
 406         msg_Warn( p_vout, "no suitable text renderer module" );
 407         p_vout->pf_add_string = NULL;
 408     }
 409
 410     /* Create a few object variables for interface interaction */
 411     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
 412     text.psz_string = _("Fullscreen");
 413     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 414     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
 415     if( val.b_bool )
 416     {
 417         /* user requested fullscreen */
 418         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 419     }
 420     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 421
 422     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 423     text.psz_string = _("Deinterlace");
 424     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 425     val.psz_string = ""; text.psz_string = _("Disable");
 426     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 427     val.psz_string = "discard"; text.psz_string = _("Discard");
 428     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 429     val.psz_string = "blend"; text.psz_string = _("Blend");
 430     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 431     val.psz_string = "mean"; text.psz_string = _("Mean");
 432     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 433     val.psz_string = "bob"; text.psz_string = _("Bob");
 434     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 435     val.psz_string = "linear"; text.psz_string = _("Linear");
 436     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 437     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 438     {
 439         var_Set( p_vout, "deinterlace", val );
 440     }
 441     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 442
 443     /* Calculate delay created by internal caching */
 444     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 445                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 446     if( p_input_thread )
 447     {
 448         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 449         vlc_object_release( p_input_thread );
 450     }
 451     else
 452     {
 453         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 454     }
 455
 456     if( vlc_thread_create( p_vout, "video output", RunThread,
 457                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 458     {
 459         msg_Err( p_vout, "out of memory" );
 460         module_Unneed( p_vout, p_vout->p_module );
 461         vlc_object_destroy( p_vout );
 462         return NULL;
 463     }
 464
 465     return p_vout;
 466 }
 467
 468 /*****************************************************************************
 469  * vout_Destroy: destroys a previously created video output
 470  *****************************************************************************
 471  * Destroy a terminated thread.
 472  * The function will request a destruction of the specified thread. If pi_error
 473  * is NULL, it will return once the thread is destroyed. Else, it will be
 474  * update using one of the THREAD_* constants.
 475  *****************************************************************************/
 476 void vout_Destroy( vout_thread_t *p_vout )
 477 {
 478     vlc_object_t *p_playlist;
 479
 480     /* Request thread destruction */
 481     p_vout->b_die = VLC_TRUE;
 482     vlc_thread_join( p_vout );
 483
 484     var_Destroy( p_vout, "intf-change" );
 485
 486     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 487                                   FIND_ANYWHERE );
 488
 489     /* Free structure */
 490     vlc_object_destroy( p_vout );
 491
 492     /* If it was the last vout, tell the interface to show up */
 493     if( p_playlist != NULL )
 494     {
 495         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 496                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 497         if( p_another_vout == NULL )
 498         {
 499             vlc_value_t val;
 500             val.b_bool = VLC_TRUE;
 501             var_Set( p_playlist, "intf-show", val );
 502         }
 503         else
 504         {
 505             vlc_object_release( p_another_vout );
 506         }
 507         vlc_object_release( p_playlist );
 508     }
 509 }
 510
 511 /*****************************************************************************
 512  * InitThread: initialize video output thread
 513  *****************************************************************************
 514  * This function is called from RunThread and performs the second step of the
 515  * initialization. It returns 0 on success. Note that the thread's flag are not
 516  * modified inside this function.
 517  *****************************************************************************/
 518 static int InitThread( vout_thread_t *p_vout )
 519 {
 520     int i, i_pgcd;
 521
 522     vlc_mutex_lock( &p_vout->change_lock );
 523
 524 #ifdef STATS
 525     p_vout->c_loops = 0;
 526 #endif
 527
 528     /* Initialize output method, it allocates direct buffers for us */
 529     if( p_vout->pf_init( p_vout ) )
 530     {
 531         vlc_mutex_unlock( &p_vout->change_lock );
 532         return VLC_EGENERIC;
 533     }
 534
 535     if( !I_OUTPUTPICTURES )
 536     {
 537         msg_Err( p_vout, "plugin was unable to allocate at least "
 538                          "one direct buffer" );
 539         p_vout->pf_end( p_vout );
 540         vlc_mutex_unlock( &p_vout->change_lock );
 541         return VLC_EGENERIC;
 542     }
 543
 544     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 545     {
 546         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 547                          "our internal buffers must have overflown." );
 548         p_vout->pf_end( p_vout );
 549         vlc_mutex_unlock( &p_vout->change_lock );
 550         return VLC_EGENERIC;
 551     }
 552
 553     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 554
 555 #if 0
 556     if( !p_vout->psz_filter_chain )
 557     {
 558         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 559
 560         if( psz_aspect )
 561         {
 562             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 563                                                       * atof( psz_aspect )
 564                                                       / p_vout->output.i_height;
 565             free( psz_aspect );
 566
 567             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 568             {
 569                 int i_pgcd = ReduceHeight( i_new_aspect );
 570                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 571                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 572                 p_vout->output.i_aspect = i_new_aspect;
 573             }
 574         }
 575     }
 576 #endif
 577
 578     i_pgcd = ReduceHeight( p_vout->render.i_aspect );
 579     msg_Dbg( p_vout,
 580              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 581              p_vout->render.i_width, p_vout->render.i_height,
 582              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 583              p_vout->render.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 584
 585     i_pgcd = ReduceHeight( p_vout->output.i_aspect );
 586     msg_Dbg( p_vout,
 587              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 588              p_vout->output.i_width, p_vout->output.i_height,
 589              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 590              p_vout->output.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 591
 592     /* Calculate shifts from system-updated masks */
 593     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 594                  p_vout->output.i_rmask );
 595     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 596                  p_vout->output.i_gmask );
 597     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 598                  p_vout->output.i_bmask );
 599
 600     /* Check whether we managed to create direct buffers similar to
 601      * the render buffers, ie same size and chroma */
 602     if( ( p_vout->output.i_width == p_vout->render.i_width )
 603      && ( p_vout->output.i_height == p_vout->render.i_height )
 604      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 605     {
 606         /* Cool ! We have direct buffers, we can ask the decoder to
 607          * directly decode into them ! Map the first render buffers to
 608          * the first direct buffers, but keep the first direct buffer
 609          * for memcpy operations */
 610         p_vout->b_direct = 1;
 611
 612         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 613         {
 614             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 615                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 616                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 617             {
 618                 /* We have enough direct buffers so there's no need to
 619                  * try to use system memory buffers. */
 620                 break;
 621             }
 622             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 623             I_RENDERPICTURES++;
 624         }
 625
 626         msg_Dbg( p_vout, "direct render, mapping "
 627                  "render pictures 0-%i to system pictures 1-%i",
 628                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 629     }
 630     else
 631     {
 632         /* Rats... Something is wrong here, we could not find an output
 633          * plugin able to directly render what we decode. See if we can
 634          * find a chroma plugin to do the conversion */
 635         p_vout->b_direct = 0;
 636
 637         /* Choose the best module */
 638         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
 639
 640         if( p_vout->chroma.p_module == NULL )
 641         {
 642             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 643                      (char*)&p_vout->render.i_chroma,
 644                      (char*)&p_vout->output.i_chroma );
 645             p_vout->pf_end( p_vout );
 646             vlc_mutex_unlock( &p_vout->change_lock );
 647             return VLC_EGENERIC;
 648         }
 649
 650         msg_Dbg( p_vout, "indirect render, mapping "
 651                  "render pictures 0-%i to system pictures %i-%i",
 652                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 653                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 654
 655         /* Append render buffers after the direct buffers */
 656         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 657         {
 658             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 659             I_RENDERPICTURES++;
 660
 661             /* Check if we have enough render pictures */
 662             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 663                 break;
 664         }
 665     }
 666
 667     /* Link pictures back to their heap */
 668     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 669     {
 670         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 671     }
 672
 673     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 674     {
 675         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 676     }
 677
 678 /* XXX XXX mark thread ready */
 679     return VLC_SUCCESS;
 680 }
 681
 682 /*****************************************************************************
 683  * RunThread: video output thread
 684  *****************************************************************************
 685  * Video output thread. This function does only returns when the thread is
 686  * terminated. It handles the pictures arriving in the video heap and the
 687  * display device events.
 688  *****************************************************************************/
 689 static void RunThread( vout_thread_t *p_vout)
 690 {
 691     int             i_index;                                /* index in heap */
 692     int             i_idle_loops = 0;  /* loops without displaying a picture */
 693     mtime_t         current_date;                            /* current date */
 694     mtime_t         display_date;                            /* display date */
 695
 696     picture_t *     p_picture;                            /* picture pointer */
 697     picture_t *     p_last_picture = NULL;                   /* last picture */
 698     picture_t *     p_directbuffer;              /* direct buffer to display */
 699
 700     subpicture_t *  p_subpic;                          /* subpicture pointer */
 701
 702     /*
 703      * Initialize thread
 704      */
 705     p_vout->b_error = InitThread( p_vout );
 706
 707     /* signal the creation of the vout */
 708     vlc_thread_ready( p_vout );
 709
 710     if( p_vout->b_error )
 711     {
 712         /* Destroy thread structures allocated by Create and InitThread */
 713         DestroyThread( p_vout );
 714         return;
 715     }
 716
 717     /*
 718      * Main loop - it is not executed if an error occured during
 719      * initialization
 720      */
 721     while( (!p_vout->b_die) && (!p_vout->b_error) )
 722     {
 723         /* Initialize loop variables */
 724         p_picture = NULL;
 725         display_date = 0;
 726         current_date = mdate();
 727
 728 #if 0
 729         p_vout->c_loops++;
 730         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 731         {
 732             msg_Dbg( p_vout, "picture heap: %d/%d",
 733                      I_RENDERPICTURES, p_vout->i_heap_size );
 734         }
 735 #endif
 736
 737         /*
 738          * Find the picture to display (the one with the earliest date).
 739          * This operation does not need lock, since only READY_PICTUREs
 740          * are handled. */
 741         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 742         {
 743             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 744                 && ( (p_picture == NULL) ||
 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         if( p_picture )
 753         {
 754             /* If we met the last picture, parse again to see whether there is
 755              * a more appropriate one. */
 756             if( p_picture == p_last_picture )
 757             {
 758                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 759                 {
 760                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 761                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 762                         && ((p_picture == p_last_picture) ||
 763                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 764                     {
 765                         p_picture = PP_RENDERPICTURE[i_index];
 766                         display_date = p_picture->date;
 767                     }
 768                 }
 769             }
 770
 771             /* If we found better than the last picture, destroy it */
 772             if( p_last_picture && p_picture != p_last_picture )
 773             {
 774                 vlc_mutex_lock( &p_vout->picture_lock );
 775                 if( p_last_picture->i_refcount )
 776                 {
 777                     p_last_picture->i_status = DISPLAYED_PICTURE;
 778                 }
 779                 else
 780                 {
 781                     p_last_picture->i_status = DESTROYED_PICTURE;
 782                     p_vout->i_heap_size--;
 783                 }
 784                 vlc_mutex_unlock( &p_vout->picture_lock );
 785                 p_last_picture = NULL;
 786             }
 787
 788             /* Compute FPS rate */
 789             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 790                 = display_date;
 791
 792             if( !p_picture->b_force &&
 793                 p_picture != p_last_picture &&
 794                 display_date < current_date + p_vout->render_time )
 795             {
 796                 /* Picture is late: it will be destroyed and the thread
 797                  * will directly choose the next picture */
 798                 vlc_mutex_lock( &p_vout->picture_lock );
 799                 if( p_picture->i_refcount )
 800                 {
 801                     /* Pretend we displayed the picture, but don't destroy
 802                      * it since the decoder might still need it. */
 803                     p_picture->i_status = DISPLAYED_PICTURE;
 804                 }
 805                 else
 806                 {
 807                     /* Destroy the picture without displaying it */
 808                     p_picture->i_status = DESTROYED_PICTURE;
 809                     p_vout->i_heap_size--;
 810                 }
 811                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 812                                   current_date - display_date );
 813                 vlc_mutex_unlock( &p_vout->picture_lock );
 814
 815                 continue;
 816             }
 817
 818             if( display_date >
 819                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 820             {
 821                 /* Picture is waaay too early: it will be destroyed */
 822                 vlc_mutex_lock( &p_vout->picture_lock );
 823                 if( p_picture->i_refcount )
 824                 {
 825                     /* Pretend we displayed the picture, but don't destroy
 826                      * it since the decoder might still need it. */
 827                     p_picture->i_status = DISPLAYED_PICTURE;
 828                 }
 829                 else
 830                 {
 831                     /* Destroy the picture without displaying it */
 832                     p_picture->i_status = DESTROYED_PICTURE;
 833                     p_vout->i_heap_size--;
 834                 }
 835                 msg_Warn( p_vout, "vout warning: early picture skipped "
 836                           "("I64Fd")", display_date - current_date
 837                           - p_vout->i_pts_delay );
 838                 vlc_mutex_unlock( &p_vout->picture_lock );
 839
 840                 continue;
 841             }
 842
 843             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 844             {
 845                 /* A picture is ready to be rendered, but its rendering date
 846                  * is far from the current one so the thread will perform an
 847                  * empty loop as if no picture were found. The picture state
 848                  * is unchanged */
 849                 p_picture    = NULL;
 850                 display_date = 0;
 851             }
 852             else if( p_picture == p_last_picture )
 853             {
 854                 /* We are asked to repeat the previous picture, but we first
 855                  * wait for a couple of idle loops */
 856                 if( i_idle_loops < 4 )
 857                 {
 858                     p_picture    = NULL;
 859                     display_date = 0;
 860                 }
 861                 else
 862                 {
 863                     /* We set the display date to something high, otherwise
 864                      * we'll have lots of problems with late pictures */
 865                     display_date = current_date + p_vout->render_time;
 866                 }
 867             }
 868         }
 869
 870         if( p_picture == NULL )
 871         {
 872             i_idle_loops++;
 873         }
 874
 875         /*
 876          * Check for subpictures to display
 877          */
 878         p_subpic = vout_SortSubPictures( p_vout, display_date );
 879
 880         /*
 881          * Perform rendering
 882          */
 883         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 884
 885         /*
 886          * Call the plugin-specific rendering method if there is one
 887          */
 888         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 889         {
 890             /* Render the direct buffer returned by vout_RenderPicture */
 891             p_vout->pf_render( p_vout, p_directbuffer );
 892         }
 893
 894         /*
 895          * Sleep, wake up
 896          */
 897         if( display_date != 0 && p_directbuffer != NULL )
 898         {
 899             mtime_t current_render_time = mdate() - current_date;
 900             /* if render time is very large we don't include it in the mean */
 901             if( current_render_time < p_vout->render_time +
 902                 VOUT_DISPLAY_DELAY )
 903             {
 904                 /* Store render time using a sliding mean weighting to
 905                  * current value in a 3 to 1 ratio*/
 906                 p_vout->render_time *= 3;
 907                 p_vout->render_time += current_render_time;
 908                 p_vout->render_time >>= 2;
 909             }
 910         }
 911
 912         /* Give back change lock */
 913         vlc_mutex_unlock( &p_vout->change_lock );
 914
 915         /* Sleep a while or until a given date */
 916         if( display_date != 0 )
 917         {
 918             /* If there are filters in the chain, better give them the picture
 919              * in advance */
 920             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 921             {
 922                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 923             }
 924         }
 925         else
 926         {
 927             msleep( VOUT_IDLE_SLEEP );
 928         }
 929
 930         /* On awakening, take back lock and send immediately picture
 931          * to display. */
 932         vlc_mutex_lock( &p_vout->change_lock );
 933
 934         /*
 935          * Display the previously rendered picture
 936          */
 937         if( p_picture != NULL && p_directbuffer != NULL )
 938         {
 939             /* Display the direct buffer returned by vout_RenderPicture */
 940             if( p_vout->pf_display )
 941             {
 942                 p_vout->pf_display( p_vout, p_directbuffer );
 943             }
 944
 945             /* Reinitialize idle loop count */
 946             i_idle_loops = 0;
 947
 948             /* Tell the vout this was the last picture and that it does not
 949              * need to be forced anymore. */
 950             p_last_picture = p_picture;
 951             p_last_picture->b_force = 0;
 952         }
 953
 954         /*
 955          * Check events and manage thread
 956          */
 957         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 958         {
 959             /* A fatal error occured, and the thread must terminate
 960              * immediately, without displaying anything - setting b_error to 1
 961              * causes the immediate end of the main while() loop. */
 962             p_vout->b_error = 1;
 963         }
 964
 965         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 966         {
 967             /* this must only happen when the vout plugin is incapable of
 968              * rescaling the picture itself. In this case we need to destroy
 969              * the current picture buffers and recreate new ones with the right
 970              * dimensions */
 971             int i;
 972
 973             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 974
 975             p_vout->pf_end( p_vout );
 976             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 977                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 978
 979             I_OUTPUTPICTURES = 0;
 980             if( p_vout->pf_init( p_vout ) )
 981             {
 982                 msg_Err( p_vout, "cannot resize display" );
 983                 /* FIXME: pf_end will be called again in EndThread() */
 984                 p_vout->b_error = 1;
 985             }
 986
 987             /* Need to reinitialise the chroma plugin */
 988             if( p_vout->chroma.p_module )
 989             {
 990                 if( p_vout->chroma.p_module->pf_deactivate )
 991                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
 992                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
 993             }
 994         }
 995     }
 996
 997     /*
 998      * Error loop - wait until the thread destruction is requested
 999      */
1000     if( p_vout->b_error )
1001     {
1002         ErrorThread( p_vout );
1003     }
1004
1005     /* End of thread */
1006     EndThread( p_vout );
1007
1008     /* Destroy thread structures allocated by CreateThread */
1009     DestroyThread( p_vout );
1010 }
1011
1012 /*****************************************************************************
1013  * ErrorThread: RunThread() error loop
1014  *****************************************************************************
1015  * This function is called when an error occured during thread main's loop. The
1016  * thread can still receive feed, but must be ready to terminate as soon as
1017  * possible.
1018  *****************************************************************************/
1019 static void ErrorThread( vout_thread_t *p_vout )
1020 {
1021     /* Wait until a `die' order */
1022     while( !p_vout->b_die )
1023     {
1024         /* Sleep a while */
1025         msleep( VOUT_IDLE_SLEEP );
1026     }
1027 }
1028
1029 /*****************************************************************************
1030  * EndThread: thread destruction
1031  *****************************************************************************
1032  * This function is called when the thread ends after a sucessful
1033  * initialization. It frees all ressources allocated by InitThread.
1034  *****************************************************************************/
1035 static void EndThread( vout_thread_t *p_vout )
1036 {
1037     int     i_index;                                        /* index in heap */
1038
1039 #ifdef STATS
1040     {
1041         struct tms cpu_usage;
1042         times( &cpu_usage );
1043
1044         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1045                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1046     }
1047 #endif
1048
1049     if( !p_vout->b_direct )
1050     {
1051         module_Unneed( p_vout, p_vout->chroma.p_module );
1052     }
1053
1054     /* Destroy all remaining pictures */
1055     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1056     {
1057         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1058         {
1059             free( p_vout->p_picture[i_index].p_data_orig );
1060         }
1061     }
1062
1063     /* Destroy all remaining subpictures */
1064     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1065     {
1066         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1067         {
1068             vout_DestroySubPicture( p_vout,
1069                                     &p_vout->p_subpicture[i_index] );
1070         }
1071     }
1072
1073     if( p_vout->p_text_renderer_module )
1074         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1075
1076     /* Destroy translation tables */
1077     p_vout->pf_end( p_vout );
1078
1079     /* Release the change lock */
1080     vlc_mutex_unlock( &p_vout->change_lock );
1081 }
1082
1083 /*****************************************************************************
1084  * DestroyThread: thread destruction
1085  *****************************************************************************
1086  * This function is called when the thread ends. It frees all ressources
1087  * allocated by CreateThread. Status is available at this stage.
1088  *****************************************************************************/
1089 static void DestroyThread( vout_thread_t *p_vout )
1090 {
1091     /* Destroy the locks */
1092     vlc_mutex_destroy( &p_vout->picture_lock );
1093     vlc_mutex_destroy( &p_vout->subpicture_lock );
1094     vlc_mutex_destroy( &p_vout->change_lock );
1095
1096     /* Release the module */
1097     module_Unneed( p_vout, p_vout->p_module );
1098 }
1099
1100 /* following functions are local */
1101
1102 static int ReduceHeight( int i_ratio )
1103 {
1104     int i_dummy = VOUT_ASPECT_FACTOR;
1105     int i_pgcd  = 1;
1106
1107     if( !i_ratio )
1108     {
1109         return i_pgcd;
1110     }
1111
1112     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1113     while( !(i_ratio & 1) && !(i_dummy & 1) )
1114     {
1115         i_ratio >>= 1;
1116         i_dummy >>= 1;
1117         i_pgcd  <<= 1;
1118     }
1119
1120     while( !(i_ratio % 3) && !(i_dummy % 3) )
1121     {
1122         i_ratio /= 3;
1123         i_dummy /= 3;
1124         i_pgcd  *= 3;
1125     }
1126
1127     while( !(i_ratio % 5) && !(i_dummy % 5) )
1128     {
1129         i_ratio /= 5;
1130         i_dummy /= 5;
1131         i_pgcd  *= 5;
1132     }
1133
1134     return i_pgcd;
1135 }
1136
1137 /*****************************************************************************
1138  * BinaryLog: computes the base 2 log of a binary value
1139  *****************************************************************************
1140  * This functions is used by MaskToShift, to get a bit index from a binary
1141  * value.
1142  *****************************************************************************/
1143 static int BinaryLog( uint32_t i )
1144 {
1145     int i_log = 0;
1146
1147     if( i == 0 ) return -31337;
1148
1149     if( i & 0xffff0000 ) i_log += 16;
1150     if( i & 0xff00ff00 ) i_log += 8;
1151     if( i & 0xf0f0f0f0 ) i_log += 4;
1152     if( i & 0xcccccccc ) i_log += 2;
1153     if( i & 0xaaaaaaaa ) i_log += 1;
1154
1155     return i_log;
1156 }
1157
1158 /*****************************************************************************
1159  * MaskToShift: transform a color mask into right and left shifts
1160  *****************************************************************************
1161  * This function is used for obtaining color shifts from masks.
1162  *****************************************************************************/
1163 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1164 {
1165     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1166
1167     if( !i_mask )
1168     {
1169         *pi_left = *pi_right = 0;
1170         return;
1171     }
1172
1173     /* Get bits */
1174     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1175     i_high = i_mask + i_low;                       /* higher bit of the mask */
1176
1177     /* Transform bits into an index */
1178     i_low =  BinaryLog (i_low);
1179     i_high = BinaryLog (i_high);
1180
1181     /* Update pointers and return */
1182     *pi_left =   i_low;
1183     *pi_right = (8 - i_high + i_low);
1184 }
1185
1186 /*****************************************************************************
1187  * InitWindowSize: find the initial dimensions the video window should have.
1188  *****************************************************************************
1189  * This function will check the "width", "height" and "zoom" config options and
1190  * will calculate the size that the video window should have.
1191  *****************************************************************************/
1192 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1193                             int *pi_height )
1194 {
1195     vlc_value_t val;
1196     int i_width, i_height;
1197     uint64_t ll_zoom;
1198
1199 #define FP_FACTOR 1000                             /* our fixed point factor */
1200
1201     var_Get( p_vout, "align", &val );
1202     p_vout->i_alignment = val.i_int;
1203
1204     var_Get( p_vout, "width", &val );
1205     i_width = val.i_int;
1206     var_Get( p_vout, "height", &val );
1207     i_height = val.i_int;
1208     var_Get( p_vout, "zoom", &val );
1209     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1210
1211     if( i_width > 0 && i_height > 0)
1212     {
1213         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1214         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1215         return;
1216     }
1217     else if( i_width > 0 )
1218     {
1219         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1220         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1221                             p_vout->render.i_aspect / FP_FACTOR );
1222         return;
1223     }
1224     else if( i_height > 0 )
1225     {
1226         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1227         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1228                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1229         return;
1230     }
1231
1232     if( p_vout->render.i_height * p_vout->render.i_aspect
1233         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1234     {
1235         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1236           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1237         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1238     }
1239     else
1240     {
1241         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1242         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1243           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1244     }
1245
1246 #undef FP_FACTOR
1247 }
1248
1249 /*****************************************************************************
1250  * vout_VarCallback: generic callback for intf variables
1251  *****************************************************************************/
1252 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1253                       vlc_value_t old_value, vlc_value_t new_value,
1254                       void * unused )
1255 {
1256     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1257     vlc_value_t val;
1258     val.b_bool = VLC_TRUE;
1259     var_Set( p_vout, "intf-change", val );
1260     return VLC_SUCCESS;
1261 }
1262
1263 /*****************************************************************************
1264  * object variables callbacks: a bunch of object variables are used by the
1265  * interfaces to interact with the vout.
1266  *****************************************************************************/
1267 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
1268                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1269 {
1270     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1271     input_thread_t *p_input;
1272     vlc_value_t val;
1273
1274     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
1275
1276     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1277                                                  FIND_PARENT );
1278     if( p_input )
1279     {
1280         /* Modify input as well because the vout might have to be restarted */
1281         var_Create( p_input, "fullscreen", VLC_VAR_BOOL );
1282         var_Set( p_input, "fullscreen", newval );
1283
1284         vlc_object_release( p_input );
1285     }
1286
1287     val.b_bool = VLC_TRUE;
1288     var_Set( p_vout, "intf-change", val );
1289     return VLC_SUCCESS;
1290 }
1291
1292 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1293                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1294 {
1295     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1296     input_thread_t *p_input;
1297     vlc_value_t val;
1298
1299     char *psz_mode = newval.psz_string;
1300     char *psz_filter;
1301     unsigned int  i;
1302
1303     psz_filter = config_GetPsz( p_vout, "filter" );
1304
1305     if( !psz_mode || !*psz_mode )
1306     {
1307         config_PutPsz( p_vout, "filter", "" );
1308     }
1309     else
1310     {
1311         if( !psz_filter || !*psz_filter )
1312         {
1313             config_PutPsz( p_vout, "filter", "deinterlace" );
1314         }
1315         else
1316         {
1317             if( strstr( psz_filter, "deinterlace" ) == NULL )
1318             {
1319                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1320                 strcat( psz_filter, ",deinterlace" );
1321             }
1322             config_PutPsz( p_vout, "filter", psz_filter );
1323         }
1324     }
1325
1326     if( psz_filter ) free( psz_filter );
1327
1328
1329     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1330                                                  FIND_PARENT );
1331     if( !p_input ) return VLC_EGENERIC;
1332
1333     if( psz_mode && *psz_mode )
1334     {
1335         val.psz_string = psz_mode;
1336         var_Set( p_vout, "deinterlace-mode", val );
1337         /* Modify input as well because the vout might have to be restarted */
1338         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1339         var_Set( p_input, "deinterlace-mode", val );
1340     }
1341
1342     /* now restart all video streams */
1343     vlc_mutex_lock( &p_input->stream.stream_lock );
1344
1345     p_vout->b_filter_change = VLC_TRUE;
1346
1347 #define ES p_input->stream.pp_es[i]
1348
1349     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1350     {
1351         if( ( ES->i_cat == VIDEO_ES ) && ES->p_decoder_fifo != NULL )
1352         {
1353             input_UnselectES( p_input, ES );
1354             input_SelectES( p_input, ES );
1355         }
1356 #undef ES
1357     }
1358     vlc_mutex_unlock( &p_input->stream.stream_lock );
1359
1360     vlc_object_release( p_input );
1361
1362     val.b_bool = VLC_TRUE;
1363     var_Set( p_vout, "intf-change", val );
1364     return VLC_SUCCESS;
1365 }