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     /*
 705      * Initialize thread
 706      */
 707     p_vout->b_error = InitThread( p_vout );
 708
 709     /* signal the creation of the vout */
 710     vlc_thread_ready( p_vout );
 711
 712     if( p_vout->b_error )
 713     {
 714         /* Destroy thread structures allocated by Create and InitThread */
 715         DestroyThread( p_vout );
 716         return;
 717     }
 718
 719     /*
 720      * Main loop - it is not executed if an error occurred during
 721      * initialization
 722      */
 723     while( (!p_vout->b_die) && (!p_vout->b_error) )
 724     {
 725         /* Initialize loop variables */
 726         p_picture = NULL;
 727         display_date = 0;
 728         current_date = mdate();
 729
 730 #if 0
 731         p_vout->c_loops++;
 732         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 733         {
 734             msg_Dbg( p_vout, "picture heap: %d/%d",
 735                      I_RENDERPICTURES, p_vout->i_heap_size );
 736         }
 737 #endif
 738
 739         /*
 740          * Find the picture to display (the one with the earliest date).
 741          * This operation does not need lock, since only READY_PICTUREs
 742          * are handled. */
 743         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 744         {
 745             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 746                 && ( (p_picture == NULL) ||
 747                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 748             {
 749                 p_picture = PP_RENDERPICTURE[i_index];
 750                 display_date = p_picture->date;
 751             }
 752         }
 753
 754         if( p_picture )
 755         {
 756             /* If we met the last picture, parse again to see whether there is
 757              * a more appropriate one. */
 758             if( p_picture == p_last_picture )
 759             {
 760                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 761                 {
 762                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 763                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 764                         && ((p_picture == p_last_picture) ||
 765                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 766                     {
 767                         p_picture = PP_RENDERPICTURE[i_index];
 768                         display_date = p_picture->date;
 769                     }
 770                 }
 771             }
 772
 773             /* If we found better than the last picture, destroy it */
 774             if( p_last_picture && p_picture != p_last_picture )
 775             {
 776                 vlc_mutex_lock( &p_vout->picture_lock );
 777                 if( p_last_picture->i_refcount )
 778                 {
 779                     p_last_picture->i_status = DISPLAYED_PICTURE;
 780                 }
 781                 else
 782                 {
 783                     p_last_picture->i_status = DESTROYED_PICTURE;
 784                     p_vout->i_heap_size--;
 785                 }
 786                 vlc_mutex_unlock( &p_vout->picture_lock );
 787                 p_last_picture = NULL;
 788             }
 789
 790             /* Compute FPS rate */
 791             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 792                 = display_date;
 793
 794             /* XXX: config_GetInt is slow, but this kind of frame dropping
 795              * should not happen that often. */
 796             if( !p_picture->b_force &&
 797                 p_picture != p_last_picture &&
 798                 display_date < current_date + p_vout->render_time &&
 799                 config_GetInt( p_vout, "skip-frames" ) )
 800             {
 801                 /* Picture is late: it will be destroyed and the thread
 802                  * will directly choose the next picture */
 803                 vlc_mutex_lock( &p_vout->picture_lock );
 804                 if( p_picture->i_refcount )
 805                 {
 806                     /* Pretend we displayed the picture, but don't destroy
 807                      * it since the decoder might still need it. */
 808                     p_picture->i_status = DISPLAYED_PICTURE;
 809                 }
 810                 else
 811                 {
 812                     /* Destroy the picture without displaying it */
 813                     p_picture->i_status = DESTROYED_PICTURE;
 814                     p_vout->i_heap_size--;
 815                 }
 816                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 817                                   current_date - display_date );
 818                 stats_UpdateInteger( p_vout, STATS_LOST_PICTURES, 1 , NULL);
 819                 vlc_mutex_unlock( &p_vout->picture_lock );
 820
 821                 continue;
 822             }
 823
 824             if( display_date >
 825                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 826             {
 827                 /* Picture is waaay too early: it will be destroyed */
 828                 vlc_mutex_lock( &p_vout->picture_lock );
 829                 if( p_picture->i_refcount )
 830                 {
 831                     /* Pretend we displayed the picture, but don't destroy
 832                      * it since the decoder might still need it. */
 833                     p_picture->i_status = DISPLAYED_PICTURE;
 834                 }
 835                 else
 836                 {
 837                     /* Destroy the picture without displaying it */
 838                     p_picture->i_status = DESTROYED_PICTURE;
 839                     p_vout->i_heap_size--;
 840                 }
 841                 stats_UpdateInteger( p_vout, STATS_LOST_PICTURES, 1, NULL );
 842                 msg_Warn( p_vout, "vout warning: early picture skipped "
 843                           "("I64Fd")", display_date - current_date
 844                           - p_vout->i_pts_delay );
 845                 vlc_mutex_unlock( &p_vout->picture_lock );
 846
 847                 continue;
 848             }
 849
 850             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 851             {
 852                 /* A picture is ready to be rendered, but its rendering date
 853                  * is far from the current one so the thread will perform an
 854                  * empty loop as if no picture were found. The picture state
 855                  * is unchanged */
 856                 p_picture    = NULL;
 857                 display_date = 0;
 858             }
 859             else if( p_picture == p_last_picture )
 860             {
 861                 /* We are asked to repeat the previous picture, but we first
 862                  * wait for a couple of idle loops */
 863                 if( i_idle_loops < 4 )
 864                 {
 865                     p_picture    = NULL;
 866                     display_date = 0;
 867                 }
 868                 else
 869                 {
 870                     /* We set the display date to something high, otherwise
 871                      * we'll have lots of problems with late pictures */
 872                     display_date = current_date + p_vout->render_time;
 873                 }
 874             }
 875         }
 876
 877         if( p_picture == NULL )
 878         {
 879             i_idle_loops++;
 880         }
 881
 882         if( p_picture && p_vout->b_snapshot )
 883         {
 884             p_vout->b_snapshot = VLC_FALSE;
 885             vout_Snapshot( p_vout, p_picture );
 886         }
 887
 888         /*
 889          * Check for subpictures to display
 890          */
 891         if( display_date > 0 )
 892         {
 893             p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 894         }
 895
 896         /*
 897          * Perform rendering
 898          */
 899         stats_UpdateInteger( p_vout, STATS_DISPLAYED_PICTURES, 1, NULL );
 900         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 901
 902         /*
 903          * Call the plugin-specific rendering method if there is one
 904          */
 905         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 906         {
 907             /* Render the direct buffer returned by vout_RenderPicture */
 908             p_vout->pf_render( p_vout, p_directbuffer );
 909         }
 910
 911         /*
 912          * Sleep, wake up
 913          */
 914         if( display_date != 0 && p_directbuffer != NULL )
 915         {
 916             mtime_t current_render_time = mdate() - current_date;
 917             /* if render time is very large we don't include it in the mean */
 918             if( current_render_time < p_vout->render_time +
 919                 VOUT_DISPLAY_DELAY )
 920             {
 921                 /* Store render time using a sliding mean weighting to
 922                  * current value in a 3 to 1 ratio*/
 923                 p_vout->render_time *= 3;
 924                 p_vout->render_time += current_render_time;
 925                 p_vout->render_time >>= 2;
 926             }
 927         }
 928
 929         /* Give back change lock */
 930         vlc_mutex_unlock( &p_vout->change_lock );
 931
 932         /* Sleep a while or until a given date */
 933         if( display_date != 0 )
 934         {
 935             /* If there are filters in the chain, better give them the picture
 936              * in advance */
 937             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 938             {
 939                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 940             }
 941         }
 942         else
 943         {
 944             msleep( VOUT_IDLE_SLEEP );
 945         }
 946
 947         /* On awakening, take back lock and send immediately picture
 948          * to display. */
 949         vlc_mutex_lock( &p_vout->change_lock );
 950
 951         /*
 952          * Display the previously rendered picture
 953          */
 954         if( p_picture != NULL && p_directbuffer != NULL )
 955         {
 956             /* Display the direct buffer returned by vout_RenderPicture */
 957             if( p_vout->pf_display )
 958             {
 959                 p_vout->pf_display( p_vout, p_directbuffer );
 960             }
 961
 962             /* Tell the vout this was the last picture and that it does not
 963              * need to be forced anymore. */
 964             p_last_picture = p_picture;
 965             p_last_picture->b_force = 0;
 966         }
 967
 968         if( p_picture != NULL )
 969         {
 970             /* Reinitialize idle loop count */
 971             i_idle_loops = 0;
 972         }
 973
 974         /*
 975          * Check events and manage thread
 976          */
 977         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 978         {
 979             /* A fatal error occurred, and the thread must terminate
 980              * immediately, without displaying anything - setting b_error to 1
 981              * causes the immediate end of the main while() loop. */
 982             p_vout->b_error = 1;
 983         }
 984
 985         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 986         {
 987             /* this must only happen when the vout plugin is incapable of
 988              * rescaling the picture itself. In this case we need to destroy
 989              * the current picture buffers and recreate new ones with the right
 990              * dimensions */
 991             int i;
 992
 993             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 994
 995             p_vout->pf_end( p_vout );
 996             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 997                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 998
 999             I_OUTPUTPICTURES = 0;
1000             if( p_vout->pf_init( p_vout ) )
1001             {
1002                 msg_Err( p_vout, "cannot resize display" );
1003                 /* FIXME: pf_end will be called again in EndThread() */
1004                 p_vout->b_error = 1;
1005             }
1006
1007             /* Need to reinitialise the chroma plugin */
1008             if( p_vout->chroma.p_module )
1009             {
1010                 if( p_vout->chroma.p_module->pf_deactivate )
1011                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1012                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1013             }
1014         }
1015
1016         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1017         {
1018             /* This happens when the picture buffers need to be recreated.
1019              * This is useful on multimonitor displays for instance.
1020              *
1021              * Warning: This only works when the vout creates only 1 picture
1022              * buffer!! */
1023             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1024
1025             if( !p_vout->b_direct )
1026             {
1027                 module_Unneed( p_vout, p_vout->chroma.p_module );
1028             }
1029
1030             vlc_mutex_lock( &p_vout->picture_lock );
1031
1032             p_vout->pf_end( p_vout );
1033
1034             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1035
1036             p_vout->b_error = InitThread( p_vout );
1037
1038             vlc_mutex_unlock( &p_vout->picture_lock );
1039         }
1040     }
1041
1042     /*
1043      * Error loop - wait until the thread destruction is requested
1044      */
1045     if( p_vout->b_error )
1046     {
1047         ErrorThread( p_vout );
1048     }
1049
1050     /* End of thread */
1051     EndThread( p_vout );
1052
1053     /* Destroy thread structures allocated by CreateThread */
1054     DestroyThread( p_vout );
1055 }
1056
1057 /*****************************************************************************
1058  * ErrorThread: RunThread() error loop
1059  *****************************************************************************
1060  * This function is called when an error occurred during thread main's loop.
1061  * The thread can still receive feed, but must be ready to terminate as soon
1062  * as possible.
1063  *****************************************************************************/
1064 static void ErrorThread( vout_thread_t *p_vout )
1065 {
1066     /* Wait until a `die' order */
1067     while( !p_vout->b_die )
1068     {
1069         /* Sleep a while */
1070         msleep( VOUT_IDLE_SLEEP );
1071     }
1072 }
1073
1074 /*****************************************************************************
1075  * EndThread: thread destruction
1076  *****************************************************************************
1077  * This function is called when the thread ends after a sucessful
1078  * initialization. It frees all resources allocated by InitThread.
1079  *****************************************************************************/
1080 static void EndThread( vout_thread_t *p_vout )
1081 {
1082     int     i_index;                                        /* index in heap */
1083
1084 #ifdef STATS
1085     {
1086         struct tms cpu_usage;
1087         times( &cpu_usage );
1088
1089         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1090                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1091     }
1092 #endif
1093
1094     if( !p_vout->b_direct )
1095     {
1096         module_Unneed( p_vout, p_vout->chroma.p_module );
1097     }
1098
1099     /* Destroy all remaining pictures */
1100     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1101     {
1102         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1103         {
1104             free( p_vout->p_picture[i_index].p_data_orig );
1105         }
1106     }
1107
1108     /* Destroy subpicture unit */
1109     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1110     spu_Destroy( p_vout->p_spu );
1111
1112     /* Destroy translation tables */
1113     p_vout->pf_end( p_vout );
1114
1115     /* Release the change lock */
1116     vlc_mutex_unlock( &p_vout->change_lock );
1117 }
1118
1119 /*****************************************************************************
1120  * DestroyThread: thread destruction
1121  *****************************************************************************
1122  * This function is called when the thread ends. It frees all ressources
1123  * allocated by CreateThread. Status is available at this stage.
1124  *****************************************************************************/
1125 static void DestroyThread( vout_thread_t *p_vout )
1126 {
1127     /* Destroy the locks */
1128     vlc_mutex_destroy( &p_vout->picture_lock );
1129     vlc_mutex_destroy( &p_vout->change_lock );
1130
1131     /* Release the module */
1132     if( p_vout && p_vout->p_module )
1133     {
1134         module_Unneed( p_vout, p_vout->p_module );
1135     }
1136 }
1137
1138 /* following functions are local */
1139
1140 static int ReduceHeight( int i_ratio )
1141 {
1142     int i_dummy = VOUT_ASPECT_FACTOR;
1143     int i_pgcd  = 1;
1144
1145     if( !i_ratio )
1146     {
1147         return i_pgcd;
1148     }
1149
1150     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1151     while( !(i_ratio & 1) && !(i_dummy & 1) )
1152     {
1153         i_ratio >>= 1;
1154         i_dummy >>= 1;
1155         i_pgcd  <<= 1;
1156     }
1157
1158     while( !(i_ratio % 3) && !(i_dummy % 3) )
1159     {
1160         i_ratio /= 3;
1161         i_dummy /= 3;
1162         i_pgcd  *= 3;
1163     }
1164
1165     while( !(i_ratio % 5) && !(i_dummy % 5) )
1166     {
1167         i_ratio /= 5;
1168         i_dummy /= 5;
1169         i_pgcd  *= 5;
1170     }
1171
1172     return i_pgcd;
1173 }
1174
1175 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1176 {
1177     unsigned int i_pgcd = ReduceHeight( i_aspect );
1178     *i_aspect_x = i_aspect / i_pgcd;
1179     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1180 }
1181
1182 /*****************************************************************************
1183  * BinaryLog: computes the base 2 log of a binary value
1184  *****************************************************************************
1185  * This functions is used by MaskToShift, to get a bit index from a binary
1186  * value.
1187  *****************************************************************************/
1188 static int BinaryLog( uint32_t i )
1189 {
1190     int i_log = 0;
1191
1192     if( i == 0 ) return -31337;
1193
1194     if( i & 0xffff0000 ) i_log += 16;
1195     if( i & 0xff00ff00 ) i_log += 8;
1196     if( i & 0xf0f0f0f0 ) i_log += 4;
1197     if( i & 0xcccccccc ) i_log += 2;
1198     if( i & 0xaaaaaaaa ) i_log += 1;
1199
1200     return i_log;
1201 }
1202
1203 /*****************************************************************************
1204  * MaskToShift: transform a color mask into right and left shifts
1205  *****************************************************************************
1206  * This function is used for obtaining color shifts from masks.
1207  *****************************************************************************/
1208 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1209 {
1210     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1211
1212     if( !i_mask )
1213     {
1214         *pi_left = *pi_right = 0;
1215         return;
1216     }
1217
1218     /* Get bits */
1219     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1220     i_high = i_mask + i_low;                       /* higher bit of the mask */
1221
1222     /* Transform bits into an index */
1223     i_low =  BinaryLog (i_low);
1224     i_high = BinaryLog (i_high);
1225
1226     /* Update pointers and return */
1227     *pi_left =   i_low;
1228     *pi_right = (8 - i_high + i_low);
1229 }
1230
1231 /*****************************************************************************
1232  * vout_VarCallback: generic callback for intf variables
1233  *****************************************************************************/
1234 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1235                       vlc_value_t old_value, vlc_value_t new_value,
1236                       void * unused )
1237 {
1238     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1239     vlc_value_t val;
1240     val.b_bool = VLC_TRUE;
1241     var_Set( p_vout, "intf-change", val );
1242     return VLC_SUCCESS;
1243 }
1244
1245 /*****************************************************************************
1246  * Helper thread for object variables callbacks.
1247  * Only used to avoid deadlocks when using the video embedded mode.
1248  *****************************************************************************/
1249 typedef struct suxor_thread_t
1250 {
1251     VLC_COMMON_MEMBERS
1252     input_thread_t *p_input;
1253
1254 } suxor_thread_t;
1255
1256 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1257 {
1258     vlc_value_t val;
1259
1260     vlc_thread_ready( p_this );
1261
1262     /* Now restart current video stream */
1263     var_Get( p_this->p_input, "video-es", &val );
1264     if( val.i_int >= 0 )
1265     {
1266         vlc_value_t val_es;
1267         val_es.i_int = -VIDEO_ES;
1268         var_Set( p_this->p_input, "video-es", val_es );
1269         var_Set( p_this->p_input, "video-es", val );
1270     }
1271
1272     vlc_object_release( p_this->p_input );
1273
1274 #ifdef WIN32
1275     CloseHandle( p_this->thread_id );
1276 #endif
1277
1278     vlc_object_destroy( p_this );
1279 }
1280
1281 /*****************************************************************************
1282  * object variables callbacks: a bunch of object variables are used by the
1283  * interfaces to interact with the vout.
1284  *****************************************************************************/
1285 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1286                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1287 {
1288     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1289     input_thread_t *p_input;
1290     vlc_value_t val;
1291
1292     char *psz_mode = newval.psz_string;
1293     char *psz_filter, *psz_deinterlace = NULL;
1294
1295     var_Get( p_vout, "vout-filter", &val );
1296     psz_filter = val.psz_string;
1297     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1298
1299     if( !psz_mode || !*psz_mode )
1300     {
1301         if( psz_deinterlace )
1302         {
1303             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1304             if( psz_src[0] == ':' ) psz_src++;
1305             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1306         }
1307     }
1308     else if( !psz_deinterlace )
1309     {
1310         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1311                               sizeof(":deinterlace") );
1312         if( psz_filter && *psz_filter ) strcat( psz_filter, ":" );
1313         strcat( psz_filter, "deinterlace" );
1314     }
1315
1316     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1317                                                  FIND_PARENT );
1318     if( !p_input ) return VLC_EGENERIC;
1319
1320     if( psz_mode && *psz_mode )
1321     {
1322         /* Modify input as well because the vout might have to be restarted */
1323         val.psz_string = psz_mode;
1324         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1325         var_Set( p_input, "deinterlace-mode", val );
1326     }
1327     vlc_object_release( p_input );
1328
1329     val.b_bool = VLC_TRUE;
1330     var_Set( p_vout, "intf-change", val );
1331
1332     val.psz_string = psz_filter;
1333     var_Set( p_vout, "vout-filter", val );
1334     if( psz_filter ) free( psz_filter );
1335
1336     return VLC_SUCCESS;
1337 }
1338
1339 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1340                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1341 {
1342     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1343     input_thread_t *p_input;
1344     vlc_value_t val;
1345
1346     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1347                                                  FIND_PARENT );
1348     if (!p_input)
1349     {
1350         msg_Err( p_vout, "Input not found" );
1351         return( VLC_EGENERIC );
1352     }
1353
1354     val.b_bool = VLC_TRUE;
1355     var_Set( p_vout, "intf-change", val );
1356
1357     /* Modify input as well because the vout might have to be restarted */
1358     val.psz_string = newval.psz_string;
1359     var_Create( p_input, "vout-filter", VLC_VAR_STRING );
1360
1361     var_Set( p_input, "vout-filter", val );
1362
1363     /* Now restart current video stream */
1364     var_Get( p_input, "video-es", &val );
1365     if( val.i_int >= 0 )
1366     {
1367         suxor_thread_t *p_suxor =
1368             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1369         p_suxor->p_input = p_input;
1370         p_vout->b_filter_change = VLC_TRUE;
1371         vlc_object_yield( p_input );
1372         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1373                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1374     }
1375
1376     vlc_object_release( p_input );
1377
1378     return VLC_SUCCESS;
1379 }