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

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  *
   4  * This module describes the programming interface for video output threads.
   5  * It includes functions allowing to open a new thread, send pictures to a
   6  * thread, and destroy a previously oppened video output thread.
   7  *****************************************************************************
   8  * Copyright (C) 2000-2004 the VideoLAN team
   9  * $Id$
  10  *
  11  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  12  *          Gildas Bazin <gbazin@videolan.org>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  27  *****************************************************************************/
  28
  29 /*****************************************************************************
  30  * Preamble
  31  *****************************************************************************/
  32 #include <stdlib.h>                                                /* free() */
  33
  34 #include <vlc/vlc.h>
  35
  36 #ifdef HAVE_SYS_TIMES_H
  37 #   include <sys/times.h>
  38 #endif
  39
  40 #include "vlc_video.h"
  41 #include "video_output.h"
  42 #include "vlc_spu.h"
  43 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  44 #include "vlc_playlist.h"
  45
  46 #if defined( __APPLE__ )
  47 #include "darwin_specific.h"
  48 #endif
  49
  50 /*****************************************************************************
  51  * Local prototypes
  52  *****************************************************************************/
  53 static int      InitThread        ( vout_thread_t * );
  54 static void     RunThread         ( vout_thread_t * );
  55 static void     ErrorThread       ( vout_thread_t * );
  56 static void     EndThread         ( vout_thread_t * );
  57 static void     DestroyThread     ( vout_thread_t * );
  58
  59 static void     AspectRatio       ( int, int *, int * );
  60 static int      BinaryLog         ( uint32_t );
  61 static void     MaskToShift       ( int *, int *, uint32_t );
  62
  63 /* Object variables callbacks */
  64 static int DeinterlaceCallback( vlc_object_t *, char const *,
  65                                 vlc_value_t, vlc_value_t, void * );
  66 static int FilterCallback( vlc_object_t *, char const *,
  67                            vlc_value_t, vlc_value_t, void * );
  68
  69 /* From vout_intf.c */
  70 int vout_Snapshot( vout_thread_t *, picture_t * );
  71
  72 /*****************************************************************************
  73  * vout_Request: find a video output thread, create one, or destroy one.
  74  *****************************************************************************
  75  * This function looks for a video output thread matching the current
  76  * properties. If not found, it spawns a new one.
  77  *****************************************************************************/
  78 vout_thread_t *__vout_Request( vlc_object_t *p_this, vout_thread_t *p_vout,
  79                                video_format_t *p_fmt )
  80 {
  81     if( !p_fmt )
  82     {
  83         /* Reattach video output to input before bailing out */
  84         if( p_vout )
  85         {
  86             vlc_object_t *p_playlist;
  87
  88             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
  89                                           FIND_ANYWHERE );
  90
  91             if( p_playlist )
  92             {
  93                 spu_Attach( p_vout->p_spu, p_this, VLC_FALSE );
  94                 vlc_object_detach( p_vout );
  95                 vlc_object_attach( p_vout, p_playlist );
  96
  97                 vlc_object_release( p_playlist );
  98             }
  99             else
 100             {
 101                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 102                 vlc_object_detach( p_vout );
 103                 vout_Destroy( p_vout );
 104             }
 105         }
 106         return NULL;
 107     }
 108
 109     /* If a video output was provided, lock it, otherwise look for one. */
 110     if( p_vout )
 111     {
 112         vlc_object_yield( p_vout );
 113     }
 114     else
 115     {
 116         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 117
 118         if( !p_vout )
 119         {
 120             playlist_t *p_playlist;
 121
 122             p_playlist = vlc_object_find( p_this,
 123                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 124             if( p_playlist )
 125             {
 126                 vlc_mutex_lock( &p_playlist->gc_lock );
 127                 p_vout = vlc_object_find( p_playlist,
 128                                           VLC_OBJECT_VOUT, FIND_CHILD );
 129                 /* only first children of p_input for unused vout */
 130                 if( p_vout && p_vout->p_parent != (vlc_object_t *)p_playlist )
 131                 {
 132                     vlc_object_release( p_vout );
 133                     p_vout = NULL;
 134                 }
 135                 vlc_mutex_unlock( &p_playlist->gc_lock );
 136                 vlc_object_release( p_playlist );
 137             }
 138         }
 139     }
 140
 141     /* If we now have a video output, check it has the right properties */
 142     if( p_vout )
 143     {
 144         char *psz_filter_chain;
 145         vlc_value_t val;
 146
 147         /* We don't directly check for the "vout-filter" variable for obvious
 148          * performance reasons. */
 149         if( p_vout->b_filter_change )
 150         {
 151             var_Get( p_vout, "vout-filter", &val );
 152             psz_filter_chain = val.psz_string;
 153
 154             if( psz_filter_chain && !*psz_filter_chain )
 155             {
 156                 free( psz_filter_chain );
 157                 psz_filter_chain = NULL;
 158             }
 159             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 160             {
 161                 free( p_vout->psz_filter_chain );
 162                 p_vout->psz_filter_chain = NULL;
 163             }
 164
 165             if( !psz_filter_chain && !p_vout->psz_filter_chain )
 166             {
 167                 p_vout->b_filter_change = VLC_FALSE;
 168             }
 169
 170             if( psz_filter_chain ) free( psz_filter_chain );
 171         }
 172
 173         if( ( p_vout->fmt_render.i_width != p_fmt->i_width ) ||
 174             ( p_vout->fmt_render.i_height != p_fmt->i_height ) ||
 175             ( p_vout->fmt_render.i_chroma != p_fmt->i_chroma ) ||
 176             ( p_vout->fmt_render.i_aspect != p_fmt->i_aspect ) ||
 177             p_vout->b_filter_change )
 178         {
 179             /* We are not interested in this format, close this vout */
 180             vlc_object_detach( p_vout );
 181             vlc_object_release( p_vout );
 182             vout_Destroy( p_vout );
 183             p_vout = NULL;
 184         }
 185         else
 186         {
 187             /* This video output is cool! Hijack it. */
 188             vlc_object_detach( p_vout );
 189             spu_Attach( p_vout->p_spu, p_this, VLC_TRUE );
 190             vlc_object_attach( p_vout, p_this );
 191             vlc_object_release( p_vout );
 192         }
 193     }
 194
 195     if( !p_vout )
 196     {
 197         msg_Dbg( p_this, "no usable vout present, spawning one" );
 198
 199         p_vout = vout_Create( p_this, p_fmt );
 200     }
 201
 202     return p_vout;
 203 }
 204
 205 /*****************************************************************************
 206  * vout_Create: creates a new video output thread
 207  *****************************************************************************
 208  * This function creates a new video output thread, and returns a pointer
 209  * to its description. On error, it returns NULL.
 210  *****************************************************************************/
 211 vout_thread_t * __vout_Create( vlc_object_t *p_parent, video_format_t *p_fmt )
 212 {
 213     vout_thread_t  * p_vout;                            /* thread descriptor */
 214     input_thread_t * p_input_thread;
 215     int              i_index;                               /* loop variable */
 216     char           * psz_plugin;
 217     vlc_value_t      val, text;
 218
 219     unsigned int i_width = p_fmt->i_width;
 220     unsigned int i_height = p_fmt->i_height;
 221     vlc_fourcc_t i_chroma = p_fmt->i_chroma;
 222     unsigned int i_aspect = p_fmt->i_aspect;
 223
 224     /* Allocate descriptor */
 225     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 226     if( p_vout == NULL )
 227     {
 228         msg_Err( p_parent, "out of memory" );
 229         return NULL;
 230     }
 231
 232     stats_Create( p_vout, "displayed_pictures",STATS_DISPLAYED_PICTURES,
 233                   VLC_VAR_INTEGER, STATS_COUNTER );
 234     stats_Create( p_vout, "lost_pictures", STATS_LOST_PICTURES,
 235                   VLC_VAR_INTEGER, STATS_COUNTER );
 236
 237     /* Initialize pictures - translation tables and functions
 238      * will be initialized later in InitThread */
 239     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 240     {
 241         p_vout->p_picture[i_index].pf_lock = NULL;
 242         p_vout->p_picture[i_index].pf_unlock = NULL;
 243         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 244         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 245         p_vout->p_picture[i_index].b_slow   = 0;
 246     }
 247
 248     /* No images in the heap */
 249     p_vout->i_heap_size = 0;
 250
 251     /* Initialize the rendering heap */
 252     I_RENDERPICTURES = 0;
 253
 254     vlc_ureduce( &p_fmt->i_sar_num, &p_fmt->i_sar_den,
 255                  p_fmt->i_sar_num, p_fmt->i_sar_den, 50000 );
 256     p_vout->fmt_render        = *p_fmt;   /* FIXME palette */
 257     p_vout->fmt_in            = *p_fmt;   /* FIXME palette */
 258
 259     p_vout->render.i_width    = i_width;
 260     p_vout->render.i_height   = i_height;
 261     p_vout->render.i_chroma   = i_chroma;
 262     p_vout->render.i_aspect   = i_aspect;
 263
 264     p_vout->render.i_rmask    = 0;
 265     p_vout->render.i_gmask    = 0;
 266     p_vout->render.i_bmask    = 0;
 267
 268     p_vout->render.i_last_used_pic = -1;
 269     p_vout->render.b_allow_modify_pics = 1;
 270
 271     /* Zero the output heap */
 272     I_OUTPUTPICTURES = 0;
 273     p_vout->output.i_width    = 0;
 274     p_vout->output.i_height   = 0;
 275     p_vout->output.i_chroma   = 0;
 276     p_vout->output.i_aspect   = 0;
 277
 278     p_vout->output.i_rmask    = 0;
 279     p_vout->output.i_gmask    = 0;
 280     p_vout->output.i_bmask    = 0;
 281
 282     /* Initialize misc stuff */
 283     p_vout->i_changes    = 0;
 284     p_vout->f_gamma      = 0;
 285     p_vout->b_grayscale  = 0;
 286     p_vout->b_info       = 0;
 287     p_vout->b_interface  = 0;
 288     p_vout->b_scale      = 1;
 289     p_vout->b_fullscreen = 0;
 290     p_vout->i_alignment  = 0;
 291     p_vout->render_time  = 10;
 292     p_vout->c_fps_samples = 0;
 293     p_vout->b_filter_change = 0;
 294     p_vout->pf_control = 0;
 295     p_vout->p_parent_intf = 0;
 296     p_vout->i_par_num = p_vout->i_par_den = 1;
 297
 298     /* Initialize locks */
 299     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 300     vlc_mutex_init( p_vout, &p_vout->change_lock );
 301
 302     /* Mouse coordinates */
 303     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 304     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 305     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 306     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 307     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 308
 309     /* Initialize subpicture unit */
 310     p_vout->p_spu = spu_Create( p_vout );
 311     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
 312
 313     /* Attach the new object now so we can use var inheritance below */
 314     vlc_object_attach( p_vout, p_parent );
 315
 316     spu_Init( p_vout->p_spu );
 317
 318     /* Take care of some "interface/control" related initialisations */
 319     vout_IntfInit( p_vout );
 320
 321     /* If the parent is not a VOUT object, that means we are at the start of
 322      * the video output pipe */
 323     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 324     {
 325         /* Look for the default filter configuration */
 326         var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 327         var_Get( p_vout, "vout-filter", &val );
 328         p_vout->psz_filter_chain = val.psz_string;
 329     }
 330     else
 331     {
 332         /* continue the parent's filter chain */
 333         char *psz_end;
 334
 335         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 336         if( psz_end && *(psz_end+1) )
 337             p_vout->psz_filter_chain = strdup( psz_end+1 );
 338         else p_vout->psz_filter_chain = NULL;
 339     }
 340
 341     /* Choose the video output module */
 342     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 343     {
 344         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 345         var_Get( p_vout, "vout", &val );
 346         psz_plugin = val.psz_string;
 347     }
 348     else
 349     {
 350         /* the filter chain is a string list of filters separated by double
 351          * colons */
 352         char *psz_end;
 353
 354         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 355         if( psz_end )
 356             psz_plugin = strndup( p_vout->psz_filter_chain,
 357                                   psz_end - p_vout->psz_filter_chain );
 358         else psz_plugin = strdup( p_vout->psz_filter_chain );
 359     }
 360
 361     /* Create the vout thread */
 362     p_vout->p_module = module_Need( p_vout,
 363         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 364         "video filter" : "video output", psz_plugin, 0 );
 365
 366     if( psz_plugin ) free( psz_plugin );
 367     if( p_vout->p_module == NULL )
 368     {
 369         msg_Err( p_vout, "no suitable vout module" );
 370         vlc_object_detach( p_vout );
 371         vlc_object_destroy( p_vout );
 372         return NULL;
 373     }
 374
 375     /* Create a few object variables for interface interaction */
 376     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 377     text.psz_string = _("Deinterlace");
 378     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 379     val.psz_string = ""; text.psz_string = _("Disable");
 380     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 381     val.psz_string = "discard"; text.psz_string = _("Discard");
 382     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 383     val.psz_string = "blend"; text.psz_string = _("Blend");
 384     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 385     val.psz_string = "mean"; text.psz_string = _("Mean");
 386     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 387     val.psz_string = "bob"; text.psz_string = _("Bob");
 388     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 389     val.psz_string = "linear"; text.psz_string = _("Linear");
 390     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 391     val.psz_string = "x"; text.psz_string = "X";
 392     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 393
 394     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 395     {
 396         var_Set( p_vout, "deinterlace", val );
 397         if( val.psz_string ) free( val.psz_string );
 398     }
 399     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 400
 401
 402     var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 403     text.psz_string = _("Filters");
 404     var_Change( p_vout, "vout-filter", VLC_VAR_SETTEXT, &text, NULL );
 405     var_AddCallback( p_vout, "vout-filter", FilterCallback, NULL );
 406
 407     /* Calculate delay created by internal caching */
 408     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 409                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 410     if( p_input_thread )
 411     {
 412         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 413         vlc_object_release( p_input_thread );
 414     }
 415     else
 416     {
 417         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 418     }
 419
 420     if( vlc_thread_create( p_vout, "video output", RunThread,
 421                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 422     {
 423         msg_Err( p_vout, "out of memory" );
 424         module_Unneed( p_vout, p_vout->p_module );
 425         vlc_object_detach( p_vout );
 426         vlc_object_destroy( p_vout );
 427         return NULL;
 428     }
 429
 430     if( p_vout->b_error )
 431     {
 432         msg_Err( p_vout, "video output creation failed" );
 433
 434         /* Make sure the thread is destroyed */
 435         p_vout->b_die = VLC_TRUE;
 436
 437         vlc_thread_join( p_vout );
 438
 439         vlc_object_detach( p_vout );
 440         vlc_object_destroy( p_vout );
 441         return NULL;
 442     }
 443
 444     return p_vout;
 445 }
 446
 447 /*****************************************************************************
 448  * vout_Destroy: destroys a previously created video output
 449  *****************************************************************************
 450  * Destroy a terminated thread.
 451  * The function will request a destruction of the specified thread. If pi_error
 452  * is NULL, it will return once the thread is destroyed. Else, it will be
 453  * update using one of the THREAD_* constants.
 454  *****************************************************************************/
 455 void vout_Destroy( vout_thread_t *p_vout )
 456 {
 457     vlc_object_t *p_playlist;
 458
 459     /* Request thread destruction */
 460     p_vout->b_die = VLC_TRUE;
 461     vlc_thread_join( p_vout );
 462
 463     var_Destroy( p_vout, "intf-change" );
 464
 465     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 466                                   FIND_ANYWHERE );
 467
 468     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 469
 470     /* Free structure */
 471     vlc_object_destroy( p_vout );
 472
 473     /* If it was the last vout, tell the interface to show up */
 474     if( p_playlist != NULL )
 475     {
 476         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 477                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 478         if( p_another_vout == NULL )
 479         {
 480             vlc_value_t val;
 481             val.b_bool = VLC_TRUE;
 482             var_Set( p_playlist, "intf-show", val );
 483         }
 484         else
 485         {
 486             vlc_object_release( p_another_vout );
 487         }
 488         vlc_object_release( p_playlist );
 489     }
 490 }
 491
 492 /*****************************************************************************
 493  * InitThread: initialize video output thread
 494  *****************************************************************************
 495  * This function is called from RunThread and performs the second step of the
 496  * initialization. It returns 0 on success. Note that the thread's flag are not
 497  * modified inside this function.
 498  *****************************************************************************/
 499 static int InitThread( vout_thread_t *p_vout )
 500 {
 501     int i, i_aspect_x, i_aspect_y;
 502
 503     vlc_mutex_lock( &p_vout->change_lock );
 504
 505 #ifdef STATS
 506     p_vout->c_loops = 0;
 507 #endif
 508
 509     /* Initialize output method, it allocates direct buffers for us */
 510     if( p_vout->pf_init( p_vout ) )
 511     {
 512         vlc_mutex_unlock( &p_vout->change_lock );
 513         return VLC_EGENERIC;
 514     }
 515
 516     if( !I_OUTPUTPICTURES )
 517     {
 518         msg_Err( p_vout, "plugin was unable to allocate at least "
 519                          "one direct buffer" );
 520         p_vout->pf_end( p_vout );
 521         vlc_mutex_unlock( &p_vout->change_lock );
 522         return VLC_EGENERIC;
 523     }
 524
 525     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 526     {
 527         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 528                          "our internal buffers must have overflown." );
 529         p_vout->pf_end( p_vout );
 530         vlc_mutex_unlock( &p_vout->change_lock );
 531         return VLC_EGENERIC;
 532     }
 533
 534     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 535
 536     AspectRatio( p_vout->fmt_render.i_aspect, &i_aspect_x, &i_aspect_y );
 537
 538     msg_Dbg( p_vout, "picture in %ix%i (%i,%i,%ix%i), "
 539              "chroma %4.4s, ar %i:%i, sar %i:%i",
 540              p_vout->fmt_render.i_width, p_vout->fmt_render.i_height,
 541              p_vout->fmt_render.i_x_offset, p_vout->fmt_render.i_y_offset,
 542              p_vout->fmt_render.i_visible_width,
 543              p_vout->fmt_render.i_visible_height,
 544              (char*)&p_vout->fmt_render.i_chroma,
 545              i_aspect_x, i_aspect_y,
 546              p_vout->fmt_render.i_sar_num, p_vout->fmt_render.i_sar_den );
 547
 548     AspectRatio( p_vout->fmt_in.i_aspect, &i_aspect_x, &i_aspect_y );
 549
 550     msg_Dbg( p_vout, "picture user %ix%i (%i,%i,%ix%i), "
 551              "chroma %4.4s, ar %i:%i, sar %i:%i",
 552              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
 553              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
 554              p_vout->fmt_in.i_visible_width,
 555              p_vout->fmt_in.i_visible_height,
 556              (char*)&p_vout->fmt_in.i_chroma,
 557              i_aspect_x, i_aspect_y,
 558              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
 559
 560     if( !p_vout->fmt_out.i_width || !p_vout->fmt_out.i_height )
 561     {
 562         p_vout->fmt_out.i_width = p_vout->fmt_out.i_visible_width =
 563             p_vout->output.i_width;
 564         p_vout->fmt_out.i_height = p_vout->fmt_out.i_visible_height =
 565             p_vout->output.i_height;
 566         p_vout->fmt_out.i_x_offset =  p_vout->fmt_out.i_y_offset = 0;
 567
 568         p_vout->fmt_out.i_aspect = p_vout->output.i_aspect;
 569         p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 570     }
 571     if( !p_vout->fmt_out.i_sar_num || !p_vout->fmt_out.i_sar_num )
 572     {
 573         p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_aspect *
 574             p_vout->fmt_out.i_height;
 575         p_vout->fmt_out.i_sar_den = VOUT_ASPECT_FACTOR *
 576             p_vout->fmt_out.i_width;
 577     }
 578
 579     vlc_ureduce( &p_vout->fmt_out.i_sar_num, &p_vout->fmt_out.i_sar_den,
 580                  p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den, 0 );
 581
 582     AspectRatio( p_vout->fmt_out.i_aspect, &i_aspect_x, &i_aspect_y );
 583
 584     msg_Dbg( p_vout, "picture out %ix%i (%i,%i,%ix%i), "
 585              "chroma %4.4s, ar %i:%i, sar %i:%i",
 586              p_vout->fmt_out.i_width, p_vout->fmt_out.i_height,
 587              p_vout->fmt_out.i_x_offset, p_vout->fmt_out.i_y_offset,
 588              p_vout->fmt_out.i_visible_width,
 589              p_vout->fmt_out.i_visible_height,
 590              (char*)&p_vout->fmt_out.i_chroma,
 591              i_aspect_x, i_aspect_y,
 592              p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den );
 593
 594     /* Calculate shifts from system-updated masks */
 595     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 596                  p_vout->output.i_rmask );
 597     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 598                  p_vout->output.i_gmask );
 599     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 600                  p_vout->output.i_bmask );
 601
 602     /* Check whether we managed to create direct buffers similar to
 603      * the render buffers, ie same size and chroma */
 604     if( ( p_vout->output.i_width == p_vout->render.i_width )
 605      && ( p_vout->output.i_height == p_vout->render.i_height )
 606      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 607     {
 608         /* Cool ! We have direct buffers, we can ask the decoder to
 609          * directly decode into them ! Map the first render buffers to
 610          * the first direct buffers, but keep the first direct buffer
 611          * for memcpy operations */
 612         p_vout->b_direct = 1;
 613
 614         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 615         {
 616             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 617                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 618                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 619             {
 620                 /* We have enough direct buffers so there's no need to
 621                  * try to use system memory buffers. */
 622                 break;
 623             }
 624             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 625             I_RENDERPICTURES++;
 626         }
 627
 628         msg_Dbg( p_vout, "direct render, mapping "
 629                  "render pictures 0-%i to system pictures 1-%i",
 630                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 631     }
 632     else
 633     {
 634         /* Rats... Something is wrong here, we could not find an output
 635          * plugin able to directly render what we decode. See if we can
 636          * find a chroma plugin to do the conversion */
 637         p_vout->b_direct = 0;
 638
 639         /* Choose the best module */
 640         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 641
 642         if( p_vout->chroma.p_module == NULL )
 643         {
 644             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 645                      (char*)&p_vout->render.i_chroma,
 646                      (char*)&p_vout->output.i_chroma );
 647             p_vout->pf_end( p_vout );
 648             vlc_mutex_unlock( &p_vout->change_lock );
 649             return VLC_EGENERIC;
 650         }
 651
 652         msg_Dbg( p_vout, "indirect render, mapping "
 653                  "render pictures 0-%i to system pictures %i-%i",
 654                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 655                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 656
 657         /* Append render buffers after the direct buffers */
 658         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 659         {
 660             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 661             I_RENDERPICTURES++;
 662
 663             /* Check if we have enough render pictures */
 664             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 665                 break;
 666         }
 667     }
 668
 669     /* Link pictures back to their heap */
 670     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 671     {
 672         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 673     }
 674
 675     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 676     {
 677         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 678     }
 679
 680 /* XXX XXX mark thread ready */
 681     return VLC_SUCCESS;
 682 }
 683
 684 /*****************************************************************************
 685  * RunThread: video output thread
 686  *****************************************************************************
 687  * Video output thread. This function does only returns when the thread is
 688  * terminated. It handles the pictures arriving in the video heap and the
 689  * display device events.
 690  *****************************************************************************/
 691 static void RunThread( vout_thread_t *p_vout)
 692 {
 693     int             i_index;                                /* index in heap */
 694     int             i_idle_loops = 0;  /* loops without displaying a picture */
 695     mtime_t         current_date;                            /* current date */
 696     mtime_t         display_date;                            /* display date */
 697
 698     picture_t *     p_picture;                            /* picture pointer */
 699     picture_t *     p_last_picture = NULL;                   /* last picture */
 700     picture_t *     p_directbuffer;              /* direct buffer to display */
 701
 702     subpicture_t *  p_subpic = NULL;                   /* subpicture pointer */
 703
 704     vlc_value_t     val;
 705     vlc_bool_t      b_drop_late;
 706
 707     /*
 708      * Initialize thread
 709      */
 710     p_vout->b_error = InitThread( p_vout );
 711
 712     var_Create( p_vout, "drop-late-frames", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 713     var_Get( p_vout, "drop-late-frames", &val );
 714     b_drop_late = val.b_bool;
 715
 716     /* signal the creation of the vout */
 717     vlc_thread_ready( p_vout );
 718
 719     if( p_vout->b_error )
 720     {
 721         /* Destroy thread structures allocated by Create and InitThread */
 722         DestroyThread( p_vout );
 723         return;
 724     }
 725
 726     /*
 727      * Main loop - it is not executed if an error occurred during
 728      * initialization
 729      */
 730     while( (!p_vout->b_die) && (!p_vout->b_error) )
 731     {
 732         /* Initialize loop variables */
 733         p_picture = NULL;
 734         display_date = 0;
 735         current_date = mdate();
 736
 737 #if 0
 738         p_vout->c_loops++;
 739         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 740         {
 741             msg_Dbg( p_vout, "picture heap: %d/%d",
 742                      I_RENDERPICTURES, p_vout->i_heap_size );
 743         }
 744 #endif
 745
 746         /*
 747          * Find the picture to display (the one with the earliest date).
 748          * This operation does not need lock, since only READY_PICTUREs
 749          * are handled. */
 750         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 751         {
 752             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 753                 && ( (p_picture == NULL) ||
 754                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 755             {
 756                 p_picture = PP_RENDERPICTURE[i_index];
 757                 display_date = p_picture->date;
 758             }
 759         }
 760
 761         if( p_picture )
 762         {
 763             /* If we met the last picture, parse again to see whether there is
 764              * a more appropriate one. */
 765             if( p_picture == p_last_picture )
 766             {
 767                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 768                 {
 769                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 770                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 771                         && ((p_picture == p_last_picture) ||
 772                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 773                     {
 774                         p_picture = PP_RENDERPICTURE[i_index];
 775                         display_date = p_picture->date;
 776                     }
 777                 }
 778             }
 779
 780             /* If we found better than the last picture, destroy it */
 781             if( p_last_picture && p_picture != p_last_picture )
 782             {
 783                 vlc_mutex_lock( &p_vout->picture_lock );
 784                 if( p_last_picture->i_refcount )
 785                 {
 786                     p_last_picture->i_status = DISPLAYED_PICTURE;
 787                 }
 788                 else
 789                 {
 790                     p_last_picture->i_status = DESTROYED_PICTURE;
 791                     p_vout->i_heap_size--;
 792                 }
 793                 vlc_mutex_unlock( &p_vout->picture_lock );
 794                 p_last_picture = NULL;
 795             }
 796
 797             /* Compute FPS rate */
 798             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 799                 = display_date;
 800
 801             if( !p_picture->b_force &&
 802                 p_picture != p_last_picture &&
 803                 display_date < current_date + p_vout->render_time &&
 804                 b_drop_late )
 805             {
 806                 /* Picture is late: it will be destroyed and the thread
 807                  * will directly choose the next picture */
 808                 vlc_mutex_lock( &p_vout->picture_lock );
 809                 if( p_picture->i_refcount )
 810                 {
 811                     /* Pretend we displayed the picture, but don't destroy
 812                      * it since the decoder might still need it. */
 813                     p_picture->i_status = DISPLAYED_PICTURE;
 814                 }
 815                 else
 816                 {
 817                     /* Destroy the picture without displaying it */
 818                     p_picture->i_status = DESTROYED_PICTURE;
 819                     p_vout->i_heap_size--;
 820                 }
 821                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 822                                   current_date - display_date );
 823                 stats_UpdateInteger( p_vout, STATS_LOST_PICTURES, 1 , NULL);
 824                 vlc_mutex_unlock( &p_vout->picture_lock );
 825
 826                 continue;
 827             }
 828
 829             if( display_date >
 830                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 831             {
 832                 /* Picture is waaay too early: it will be destroyed */
 833                 vlc_mutex_lock( &p_vout->picture_lock );
 834                 if( p_picture->i_refcount )
 835                 {
 836                     /* Pretend we displayed the picture, but don't destroy
 837                      * it since the decoder might still need it. */
 838                     p_picture->i_status = DISPLAYED_PICTURE;
 839                 }
 840                 else
 841                 {
 842                     /* Destroy the picture without displaying it */
 843                     p_picture->i_status = DESTROYED_PICTURE;
 844                     p_vout->i_heap_size--;
 845                 }
 846                 stats_UpdateInteger( p_vout, STATS_LOST_PICTURES, 1, NULL );
 847                 msg_Warn( p_vout, "vout warning: early picture skipped "
 848                           "("I64Fd")", display_date - current_date
 849                           - p_vout->i_pts_delay );
 850                 vlc_mutex_unlock( &p_vout->picture_lock );
 851
 852                 continue;
 853             }
 854
 855             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 856             {
 857                 /* A picture is ready to be rendered, but its rendering date
 858                  * is far from the current one so the thread will perform an
 859                  * empty loop as if no picture were found. The picture state
 860                  * is unchanged */
 861                 p_picture    = NULL;
 862                 display_date = 0;
 863             }
 864             else if( p_picture == p_last_picture )
 865             {
 866                 /* We are asked to repeat the previous picture, but we first
 867                  * wait for a couple of idle loops */
 868                 if( i_idle_loops < 4 )
 869                 {
 870                     p_picture    = NULL;
 871                     display_date = 0;
 872                 }
 873                 else
 874                 {
 875                     /* We set the display date to something high, otherwise
 876                      * we'll have lots of problems with late pictures */
 877                     display_date = current_date + p_vout->render_time;
 878                 }
 879             }
 880         }
 881
 882         if( p_picture == NULL )
 883         {
 884             i_idle_loops++;
 885         }
 886
 887         if( p_picture && p_vout->b_snapshot )
 888         {
 889             p_vout->b_snapshot = VLC_FALSE;
 890             vout_Snapshot( p_vout, p_picture );
 891         }
 892
 893         /*
 894          * Check for subpictures to display
 895          */
 896         if( display_date > 0 )
 897         {
 898             p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 899         }
 900
 901         /*
 902          * Perform rendering
 903          */
 904         stats_UpdateInteger( p_vout, STATS_DISPLAYED_PICTURES, 1, NULL );
 905         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 906
 907         /*
 908          * Call the plugin-specific rendering method if there is one
 909          */
 910         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 911         {
 912             /* Render the direct buffer returned by vout_RenderPicture */
 913             p_vout->pf_render( p_vout, p_directbuffer );
 914         }
 915
 916         /*
 917          * Sleep, wake up
 918          */
 919         if( display_date != 0 && p_directbuffer != NULL )
 920         {
 921             mtime_t current_render_time = mdate() - current_date;
 922             /* if render time is very large we don't include it in the mean */
 923             if( current_render_time < p_vout->render_time +
 924                 VOUT_DISPLAY_DELAY )
 925             {
 926                 /* Store render time using a sliding mean weighting to
 927                  * current value in a 3 to 1 ratio*/
 928                 p_vout->render_time *= 3;
 929                 p_vout->render_time += current_render_time;
 930                 p_vout->render_time >>= 2;
 931             }
 932         }
 933
 934         /* Give back change lock */
 935         vlc_mutex_unlock( &p_vout->change_lock );
 936
 937         /* Sleep a while or until a given date */
 938         if( display_date != 0 )
 939         {
 940             /* If there are filters in the chain, better give them the picture
 941              * in advance */
 942             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 943             {
 944                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 945             }
 946         }
 947         else
 948         {
 949             msleep( VOUT_IDLE_SLEEP );
 950         }
 951
 952         /* On awakening, take back lock and send immediately picture
 953          * to display. */
 954         vlc_mutex_lock( &p_vout->change_lock );
 955
 956         /*
 957          * Display the previously rendered picture
 958          */
 959         if( p_picture != NULL && p_directbuffer != NULL )
 960         {
 961             /* Display the direct buffer returned by vout_RenderPicture */
 962             if( p_vout->pf_display )
 963             {
 964                 p_vout->pf_display( p_vout, p_directbuffer );
 965             }
 966
 967             /* Tell the vout this was the last picture and that it does not
 968              * need to be forced anymore. */
 969             p_last_picture = p_picture;
 970             p_last_picture->b_force = 0;
 971         }
 972
 973         if( p_picture != NULL )
 974         {
 975             /* Reinitialize idle loop count */
 976             i_idle_loops = 0;
 977         }
 978
 979         /*
 980          * Check events and manage thread
 981          */
 982         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 983         {
 984             /* A fatal error occurred, and the thread must terminate
 985              * immediately, without displaying anything - setting b_error to 1
 986              * causes the immediate end of the main while() loop. */
 987             p_vout->b_error = 1;
 988         }
 989
 990         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 991         {
 992             /* this must only happen when the vout plugin is incapable of
 993              * rescaling the picture itself. In this case we need to destroy
 994              * the current picture buffers and recreate new ones with the right
 995              * dimensions */
 996             int i;
 997
 998             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 999
1000             p_vout->pf_end( p_vout );
1001             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1002                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1003
1004             I_OUTPUTPICTURES = 0;
1005             if( p_vout->pf_init( p_vout ) )
1006             {
1007                 msg_Err( p_vout, "cannot resize display" );
1008                 /* FIXME: pf_end will be called again in EndThread() */
1009                 p_vout->b_error = 1;
1010             }
1011
1012             /* Need to reinitialise the chroma plugin */
1013             if( p_vout->chroma.p_module )
1014             {
1015                 if( p_vout->chroma.p_module->pf_deactivate )
1016                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1017                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1018             }
1019         }
1020
1021         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1022         {
1023             /* This happens when the picture buffers need to be recreated.
1024              * This is useful on multimonitor displays for instance.
1025              *
1026              * Warning: This only works when the vout creates only 1 picture
1027              * buffer!! */
1028             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1029
1030             if( !p_vout->b_direct )
1031             {
1032                 module_Unneed( p_vout, p_vout->chroma.p_module );
1033             }
1034
1035             vlc_mutex_lock( &p_vout->picture_lock );
1036
1037             p_vout->pf_end( p_vout );
1038
1039             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1040
1041             p_vout->b_error = InitThread( p_vout );
1042
1043             vlc_mutex_unlock( &p_vout->picture_lock );
1044         }
1045     }
1046
1047     /*
1048      * Error loop - wait until the thread destruction is requested
1049      */
1050     if( p_vout->b_error )
1051     {
1052         ErrorThread( p_vout );
1053     }
1054
1055     /* End of thread */
1056     EndThread( p_vout );
1057
1058     /* Destroy thread structures allocated by CreateThread */
1059     DestroyThread( p_vout );
1060 }
1061
1062 /*****************************************************************************
1063  * ErrorThread: RunThread() error loop
1064  *****************************************************************************
1065  * This function is called when an error occurred during thread main's loop.
1066  * The thread can still receive feed, but must be ready to terminate as soon
1067  * as possible.
1068  *****************************************************************************/
1069 static void ErrorThread( vout_thread_t *p_vout )
1070 {
1071     /* Wait until a `die' order */
1072     while( !p_vout->b_die )
1073     {
1074         /* Sleep a while */
1075         msleep( VOUT_IDLE_SLEEP );
1076     }
1077 }
1078
1079 /*****************************************************************************
1080  * EndThread: thread destruction
1081  *****************************************************************************
1082  * This function is called when the thread ends after a sucessful
1083  * initialization. It frees all resources allocated by InitThread.
1084  *****************************************************************************/
1085 static void EndThread( vout_thread_t *p_vout )
1086 {
1087     int     i_index;                                        /* index in heap */
1088
1089 #ifdef STATS
1090     {
1091         struct tms cpu_usage;
1092         times( &cpu_usage );
1093
1094         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1095                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1096     }
1097 #endif
1098
1099     if( !p_vout->b_direct )
1100     {
1101         module_Unneed( p_vout, p_vout->chroma.p_module );
1102     }
1103
1104     /* Destroy all remaining pictures */
1105     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1106     {
1107         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1108         {
1109             free( p_vout->p_picture[i_index].p_data_orig );
1110         }
1111     }
1112
1113     /* Destroy subpicture unit */
1114     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1115     spu_Destroy( p_vout->p_spu );
1116
1117     /* Destroy translation tables */
1118     p_vout->pf_end( p_vout );
1119
1120     /* Release the change lock */
1121     vlc_mutex_unlock( &p_vout->change_lock );
1122 }
1123
1124 /*****************************************************************************
1125  * DestroyThread: thread destruction
1126  *****************************************************************************
1127  * This function is called when the thread ends. It frees all ressources
1128  * allocated by CreateThread. Status is available at this stage.
1129  *****************************************************************************/
1130 static void DestroyThread( vout_thread_t *p_vout )
1131 {
1132     /* Destroy the locks */
1133     vlc_mutex_destroy( &p_vout->picture_lock );
1134     vlc_mutex_destroy( &p_vout->change_lock );
1135
1136     /* Release the module */
1137     if( p_vout && p_vout->p_module )
1138     {
1139         module_Unneed( p_vout, p_vout->p_module );
1140     }
1141 }
1142
1143 /* following functions are local */
1144
1145 static int ReduceHeight( int i_ratio )
1146 {
1147     int i_dummy = VOUT_ASPECT_FACTOR;
1148     int i_pgcd  = 1;
1149
1150     if( !i_ratio )
1151     {
1152         return i_pgcd;
1153     }
1154
1155     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1156     while( !(i_ratio & 1) && !(i_dummy & 1) )
1157     {
1158         i_ratio >>= 1;
1159         i_dummy >>= 1;
1160         i_pgcd  <<= 1;
1161     }
1162
1163     while( !(i_ratio % 3) && !(i_dummy % 3) )
1164     {
1165         i_ratio /= 3;
1166         i_dummy /= 3;
1167         i_pgcd  *= 3;
1168     }
1169
1170     while( !(i_ratio % 5) && !(i_dummy % 5) )
1171     {
1172         i_ratio /= 5;
1173         i_dummy /= 5;
1174         i_pgcd  *= 5;
1175     }
1176
1177     return i_pgcd;
1178 }
1179
1180 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1181 {
1182     unsigned int i_pgcd = ReduceHeight( i_aspect );
1183     *i_aspect_x = i_aspect / i_pgcd;
1184     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1185 }
1186
1187 /*****************************************************************************
1188  * BinaryLog: computes the base 2 log of a binary value
1189  *****************************************************************************
1190  * This functions is used by MaskToShift, to get a bit index from a binary
1191  * value.
1192  *****************************************************************************/
1193 static int BinaryLog( uint32_t i )
1194 {
1195     int i_log = 0;
1196
1197     if( i == 0 ) return -31337;
1198
1199     if( i & 0xffff0000 ) i_log += 16;
1200     if( i & 0xff00ff00 ) i_log += 8;
1201     if( i & 0xf0f0f0f0 ) i_log += 4;
1202     if( i & 0xcccccccc ) i_log += 2;
1203     if( i & 0xaaaaaaaa ) i_log += 1;
1204
1205     return i_log;
1206 }
1207
1208 /*****************************************************************************
1209  * MaskToShift: transform a color mask into right and left shifts
1210  *****************************************************************************
1211  * This function is used for obtaining color shifts from masks.
1212  *****************************************************************************/
1213 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1214 {
1215     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1216
1217     if( !i_mask )
1218     {
1219         *pi_left = *pi_right = 0;
1220         return;
1221     }
1222
1223     /* Get bits */
1224     i_low = i_high = i_mask;
1225
1226     i_low &= - (int32_t)i_low;          /* lower bit of the mask */
1227     i_high += i_low;                    /* higher bit of the mask */
1228
1229     /* Transform bits into an index. Also deal with i_high overflow, which
1230      * is faster than changing the BinaryLog code to handle 64 bit integers. */
1231     i_low =  BinaryLog (i_low);
1232     i_high = i_high ? BinaryLog (i_high) : 32;
1233
1234     /* Update pointers and return */
1235     *pi_left =   i_low;
1236     *pi_right = (8 - i_high + i_low);
1237 }
1238
1239 /*****************************************************************************
1240  * vout_VarCallback: generic callback for intf variables
1241  *****************************************************************************/
1242 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1243                       vlc_value_t old_value, vlc_value_t new_value,
1244                       void * unused )
1245 {
1246     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1247     vlc_value_t val;
1248     val.b_bool = VLC_TRUE;
1249     var_Set( p_vout, "intf-change", val );
1250     return VLC_SUCCESS;
1251 }
1252
1253 /*****************************************************************************
1254  * Helper thread for object variables callbacks.
1255  * Only used to avoid deadlocks when using the video embedded mode.
1256  *****************************************************************************/
1257 typedef struct suxor_thread_t
1258 {
1259     VLC_COMMON_MEMBERS
1260     input_thread_t *p_input;
1261
1262 } suxor_thread_t;
1263
1264 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1265 {
1266     vlc_value_t val;
1267
1268     vlc_thread_ready( p_this );
1269
1270     /* Now restart current video stream */
1271     var_Get( p_this->p_input, "video-es", &val );
1272     if( val.i_int >= 0 )
1273     {
1274         vlc_value_t val_es;
1275         val_es.i_int = -VIDEO_ES;
1276         var_Set( p_this->p_input, "video-es", val_es );
1277         var_Set( p_this->p_input, "video-es", val );
1278     }
1279
1280     vlc_object_release( p_this->p_input );
1281
1282 #ifdef WIN32
1283     CloseHandle( p_this->thread_id );
1284 #endif
1285
1286     vlc_object_destroy( p_this );
1287 }
1288
1289 /*****************************************************************************
1290  * object variables callbacks: a bunch of object variables are used by the
1291  * interfaces to interact with the vout.
1292  *****************************************************************************/
1293 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1294                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1295 {
1296     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1297     input_thread_t *p_input;
1298     vlc_value_t val;
1299
1300     char *psz_mode = newval.psz_string;
1301     char *psz_filter, *psz_deinterlace = NULL;
1302
1303     var_Get( p_vout, "vout-filter", &val );
1304     psz_filter = val.psz_string;
1305     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1306
1307     if( !psz_mode || !*psz_mode )
1308     {
1309         if( psz_deinterlace )
1310         {
1311             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1312             if( psz_src[0] == ':' ) psz_src++;
1313             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1314         }
1315     }
1316     else if( !psz_deinterlace )
1317     {
1318         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1319                               sizeof(":deinterlace") );
1320         if( psz_filter && *psz_filter ) strcat( psz_filter, ":" );
1321         strcat( psz_filter, "deinterlace" );
1322     }
1323
1324     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1325                                                  FIND_PARENT );
1326     if( !p_input ) return VLC_EGENERIC;
1327
1328     if( psz_mode && *psz_mode )
1329     {
1330         /* Modify input as well because the vout might have to be restarted */
1331         val.psz_string = psz_mode;
1332         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1333         var_Set( p_input, "deinterlace-mode", val );
1334     }
1335     vlc_object_release( p_input );
1336
1337     val.b_bool = VLC_TRUE;
1338     var_Set( p_vout, "intf-change", val );
1339
1340     val.psz_string = psz_filter;
1341     var_Set( p_vout, "vout-filter", val );
1342     if( psz_filter ) free( psz_filter );
1343
1344     return VLC_SUCCESS;
1345 }
1346
1347 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1348                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1349 {
1350     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1351     input_thread_t *p_input;
1352     vlc_value_t val;
1353
1354     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1355                                                  FIND_PARENT );
1356     if (!p_input)
1357     {
1358         msg_Err( p_vout, "Input not found" );
1359         return( VLC_EGENERIC );
1360     }
1361
1362     val.b_bool = VLC_TRUE;
1363     var_Set( p_vout, "intf-change", val );
1364
1365     /* Modify input as well because the vout might have to be restarted */
1366     val.psz_string = newval.psz_string;
1367     var_Create( p_input, "vout-filter", VLC_VAR_STRING );
1368
1369     var_Set( p_input, "vout-filter", val );
1370
1371     /* Now restart current video stream */
1372     var_Get( p_input, "video-es", &val );
1373     if( val.i_int >= 0 )
1374     {
1375         suxor_thread_t *p_suxor =
1376             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1377         p_suxor->p_input = p_input;
1378         p_vout->b_filter_change = VLC_TRUE;
1379         vlc_object_yield( p_input );
1380         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1381                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1382     }
1383
1384     vlc_object_release( p_input );
1385
1386     return VLC_SUCCESS;
1387 }