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., 59 Temple Place - Suite 330, Boston, MA  02111, 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( SYS_DARWIN )
  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 static void     InitWindowSize    ( vout_thread_t *, unsigned *, unsigned * );
  63
  64 /* Object variables callbacks */
  65 static int DeinterlaceCallback( vlc_object_t *, char const *,
  66                                 vlc_value_t, vlc_value_t, void * );
  67 static int FilterCallback( vlc_object_t *, char const *,
  68                            vlc_value_t, vlc_value_t, void * );
  69
  70 /* From vout_intf.c */
  71 int vout_Snapshot( vout_thread_t *, picture_t * );
  72
  73 /*****************************************************************************
  74  * vout_Request: find a video output thread, create one, or destroy one.
  75  *****************************************************************************
  76  * This function looks for a video output thread matching the current
  77  * properties. If not found, it spawns a new one.
  78  *****************************************************************************/
  79 vout_thread_t *__vout_Request( vlc_object_t *p_this, vout_thread_t *p_vout,
  80                                video_format_t *p_fmt )
  81 {
  82     if( !p_fmt )
  83     {
  84         /* Reattach video output to input before bailing out */
  85         if( p_vout )
  86         {
  87             vlc_object_t *p_playlist;
  88
  89             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
  90                                           FIND_ANYWHERE );
  91
  92             if( p_playlist )
  93             {
  94                 spu_Attach( p_vout->p_spu, p_this, VLC_FALSE );
  95                 vlc_object_detach( p_vout );
  96                 vlc_object_attach( p_vout, p_playlist );
  97
  98                 vlc_object_release( p_playlist );
  99             }
 100             else
 101             {
 102                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 103                 vlc_object_detach( p_vout );
 104                 vout_Destroy( p_vout );
 105             }
 106         }
 107         return NULL;
 108     }
 109
 110     /* If a video output was provided, lock it, otherwise look for one. */
 111     if( p_vout )
 112     {
 113         vlc_object_yield( p_vout );
 114     }
 115     else
 116     {
 117         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 118
 119         if( !p_vout )
 120         {
 121             playlist_t *p_playlist;
 122
 123             p_playlist = vlc_object_find( p_this,
 124                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 125             if( p_playlist )
 126             {
 127                 vlc_mutex_lock( &p_playlist->gc_lock );
 128                 p_vout = vlc_object_find( p_playlist,
 129                                           VLC_OBJECT_VOUT, FIND_CHILD );
 130                 /* only first children of p_input for unused vout */
 131                 if( p_vout && p_vout->p_parent != (vlc_object_t *)p_playlist )
 132                 {
 133                     vlc_object_release( p_vout );
 134                     p_vout = NULL;
 135                 }
 136                 vlc_mutex_unlock( &p_playlist->gc_lock );
 137                 vlc_object_release( p_playlist );
 138             }
 139         }
 140     }
 141
 142     /* If we now have a video output, check it has the right properties */
 143     if( p_vout )
 144     {
 145         char *psz_filter_chain;
 146         vlc_value_t val;
 147
 148         /* We don't directly check for the "vout-filter" variable for obvious
 149          * performance reasons. */
 150         if( p_vout->b_filter_change )
 151         {
 152             var_Get( p_vout, "vout-filter", &val );
 153             psz_filter_chain = val.psz_string;
 154
 155             if( psz_filter_chain && !*psz_filter_chain )
 156             {
 157                 free( psz_filter_chain );
 158                 psz_filter_chain = NULL;
 159             }
 160             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 161             {
 162                 free( p_vout->psz_filter_chain );
 163                 p_vout->psz_filter_chain = NULL;
 164             }
 165
 166             if( !psz_filter_chain && !p_vout->psz_filter_chain )
 167             {
 168                 p_vout->b_filter_change = VLC_FALSE;
 169             }
 170
 171             if( psz_filter_chain ) free( psz_filter_chain );
 172         }
 173
 174         if( ( p_vout->fmt_render.i_width != p_fmt->i_width ) ||
 175             ( p_vout->fmt_render.i_height != p_fmt->i_height ) ||
 176             ( p_vout->fmt_render.i_chroma != p_fmt->i_chroma ) ||
 177             ( p_vout->fmt_render.i_aspect != p_fmt->i_aspect
 178                     && !p_vout->b_override_aspect ) ||
 179             p_vout->b_filter_change )
 180         {
 181             /* We are not interested in this format, close this vout */
 182             vlc_object_detach( p_vout );
 183             vlc_object_release( p_vout );
 184             vout_Destroy( p_vout );
 185             p_vout = NULL;
 186         }
 187         else
 188         {
 189             /* This video output is cool! Hijack it. */
 190             vlc_object_detach( p_vout );
 191             spu_Attach( p_vout->p_spu, p_this, VLC_TRUE );
 192             vlc_object_attach( p_vout, p_this );
 193             vlc_object_release( p_vout );
 194         }
 195     }
 196
 197     if( !p_vout )
 198     {
 199         msg_Dbg( p_this, "no usable vout present, spawning one" );
 200
 201         p_vout = vout_Create( p_this, p_fmt );
 202     }
 203
 204     return p_vout;
 205 }
 206
 207 /*****************************************************************************
 208  * vout_Create: creates a new video output thread
 209  *****************************************************************************
 210  * This function creates a new video output thread, and returns a pointer
 211  * to its description. On error, it returns NULL.
 212  *****************************************************************************/
 213 vout_thread_t * __vout_Create( vlc_object_t *p_parent, video_format_t *p_fmt )
 214 {
 215     vout_thread_t  * p_vout;                            /* thread descriptor */
 216     input_thread_t * p_input_thread;
 217     int              i_index;                               /* loop variable */
 218     char           * psz_plugin;
 219     vlc_value_t      val, text;
 220
 221     unsigned int i_width = p_fmt->i_width;
 222     unsigned int i_height = p_fmt->i_height;
 223     vlc_fourcc_t i_chroma = p_fmt->i_chroma;
 224     unsigned int i_aspect = p_fmt->i_aspect;
 225
 226     /* Allocate descriptor */
 227     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 228     if( p_vout == NULL )
 229     {
 230         msg_Err( p_parent, "out of memory" );
 231         return NULL;
 232     }
 233
 234     /* Initialize pictures - translation tables and functions
 235      * will be initialized later in InitThread */
 236     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 237     {
 238         p_vout->p_picture[i_index].pf_lock = NULL;
 239         p_vout->p_picture[i_index].pf_unlock = NULL;
 240         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 241         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 242         p_vout->p_picture[i_index].b_slow   = 0;
 243     }
 244
 245     /* No images in the heap */
 246     p_vout->i_heap_size = 0;
 247
 248     /* Initialize the rendering heap */
 249     I_RENDERPICTURES = 0;
 250     p_vout->fmt_render        = *p_fmt;   /* FIXME palette */
 251     p_vout->fmt_in            = *p_fmt;   /* FIXME palette */
 252     vlc_ureduce( &p_vout->fmt_render.i_sar_num, &p_vout->fmt_render.i_sar_den,
 253               p_vout->fmt_render.i_sar_num, p_vout->fmt_render.i_sar_den, 0 );
 254     vlc_ureduce( &p_vout->fmt_in.i_sar_num, &p_vout->fmt_in.i_sar_den,
 255               p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den, 0 );
 256
 257     p_vout->render.i_width    = i_width;
 258     p_vout->render.i_height   = i_height;
 259     p_vout->render.i_chroma   = i_chroma;
 260     p_vout->render.i_aspect   = i_aspect;
 261
 262     p_vout->render.i_rmask    = 0;
 263     p_vout->render.i_gmask    = 0;
 264     p_vout->render.i_bmask    = 0;
 265
 266     p_vout->render.i_last_used_pic = -1;
 267     p_vout->render.b_allow_modify_pics = 1;
 268
 269     /* Zero the output heap */
 270     I_OUTPUTPICTURES = 0;
 271     p_vout->output.i_width    = 0;
 272     p_vout->output.i_height   = 0;
 273     p_vout->output.i_chroma   = 0;
 274     p_vout->output.i_aspect   = 0;
 275
 276     p_vout->output.i_rmask    = 0;
 277     p_vout->output.i_gmask    = 0;
 278     p_vout->output.i_bmask    = 0;
 279
 280     /* Initialize misc stuff */
 281     p_vout->i_changes    = 0;
 282     p_vout->f_gamma      = 0;
 283     p_vout->b_grayscale  = 0;
 284     p_vout->b_info       = 0;
 285     p_vout->b_interface  = 0;
 286     p_vout->b_scale      = 1;
 287     p_vout->b_fullscreen = 0;
 288     p_vout->i_alignment  = 0;
 289     p_vout->render_time  = 10;
 290     p_vout->c_fps_samples = 0;
 291     p_vout->b_filter_change = 0;
 292     p_vout->pf_control = 0;
 293     p_vout->p_parent_intf = 0;
 294     p_vout->i_par_num = p_vout->i_par_den = 1;
 295
 296     /* Initialize locks */
 297     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 298     vlc_mutex_init( p_vout, &p_vout->change_lock );
 299
 300     /* Mouse coordinates */
 301     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 302     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 303     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 304     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 305     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 306
 307     /* Initialize subpicture unit */
 308     p_vout->p_spu = spu_Create( p_vout );
 309     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
 310
 311     /* Attach the new object now so we can use var inheritance below */
 312     vlc_object_attach( p_vout, p_parent );
 313
 314     spu_Init( p_vout->p_spu );
 315
 316     /* Take care of some "interface/control" related initialisations */
 317     vout_IntfInit( p_vout );
 318
 319     p_vout->b_override_aspect = VLC_FALSE;
 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     /* Initialize the dimensions of the video window */
 362     InitWindowSize( p_vout, &p_vout->i_window_width,
 363                     &p_vout->i_window_height );
 364     msg_Dbg( p_vout, "Window size: %dx%d", p_vout->i_window_width,
 365              p_vout->i_window_height );
 366
 367     /* Create the vout thread */
 368     p_vout->p_module = module_Need( p_vout,
 369         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 370         "video filter" : "video output", psz_plugin, 0 );
 371
 372     if( psz_plugin ) free( psz_plugin );
 373     if( p_vout->p_module == NULL )
 374     {
 375         msg_Err( p_vout, "no suitable vout module" );
 376         vlc_object_detach( p_vout );
 377         vlc_object_destroy( p_vout );
 378         return NULL;
 379     }
 380
 381     /* Create a few object variables for interface interaction */
 382     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 383     text.psz_string = _("Deinterlace");
 384     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 385     val.psz_string = ""; text.psz_string = _("Disable");
 386     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 387     val.psz_string = "discard"; text.psz_string = _("Discard");
 388     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 389     val.psz_string = "blend"; text.psz_string = _("Blend");
 390     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 391     val.psz_string = "mean"; text.psz_string = _("Mean");
 392     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 393     val.psz_string = "bob"; text.psz_string = _("Bob");
 394     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 395     val.psz_string = "linear"; text.psz_string = _("Linear");
 396     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 397     val.psz_string = "x"; text.psz_string = "X";
 398     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 399
 400     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 401     {
 402         var_Set( p_vout, "deinterlace", val );
 403         if( val.psz_string ) free( val.psz_string );
 404     }
 405     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 406
 407
 408     var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 409     text.psz_string = _("Filters");
 410     var_Change( p_vout, "vout-filter", VLC_VAR_SETTEXT, &text, NULL );
 411     var_AddCallback( p_vout, "vout-filter", FilterCallback, NULL );
 412
 413     /* Calculate delay created by internal caching */
 414     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 415                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 416     if( p_input_thread )
 417     {
 418         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 419         vlc_object_release( p_input_thread );
 420     }
 421     else
 422     {
 423         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 424     }
 425
 426     if( vlc_thread_create( p_vout, "video output", RunThread,
 427                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 428     {
 429         msg_Err( p_vout, "out of memory" );
 430         module_Unneed( p_vout, p_vout->p_module );
 431         vlc_object_detach( p_vout );
 432         vlc_object_destroy( p_vout );
 433         return NULL;
 434     }
 435
 436     if( p_vout->b_error )
 437     {
 438         msg_Err( p_vout, "video output creation failed" );
 439
 440         /* Make sure the thread is destroyed */
 441         p_vout->b_die = VLC_TRUE;
 442
 443         vlc_thread_join( p_vout );
 444
 445         vlc_object_detach( p_vout );
 446         vlc_object_destroy( p_vout );
 447         return NULL;
 448     }
 449
 450     return p_vout;
 451 }
 452
 453 /*****************************************************************************
 454  * vout_Destroy: destroys a previously created video output
 455  *****************************************************************************
 456  * Destroy a terminated thread.
 457  * The function will request a destruction of the specified thread. If pi_error
 458  * is NULL, it will return once the thread is destroyed. Else, it will be
 459  * update using one of the THREAD_* constants.
 460  *****************************************************************************/
 461 void vout_Destroy( vout_thread_t *p_vout )
 462 {
 463     vlc_object_t *p_playlist;
 464
 465     /* Request thread destruction */
 466     p_vout->b_die = VLC_TRUE;
 467     vlc_thread_join( p_vout );
 468
 469     var_Destroy( p_vout, "intf-change" );
 470
 471     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 472                                   FIND_ANYWHERE );
 473
 474     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 475
 476     /* Free structure */
 477     vlc_object_destroy( p_vout );
 478
 479     /* If it was the last vout, tell the interface to show up */
 480     if( p_playlist != NULL )
 481     {
 482         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 483                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 484         if( p_another_vout == NULL )
 485         {
 486             vlc_value_t val;
 487             val.b_bool = VLC_TRUE;
 488             var_Set( p_playlist, "intf-show", val );
 489         }
 490         else
 491         {
 492             vlc_object_release( p_another_vout );
 493         }
 494         vlc_object_release( p_playlist );
 495     }
 496 }
 497
 498 /*****************************************************************************
 499  * InitThread: initialize video output thread
 500  *****************************************************************************
 501  * This function is called from RunThread and performs the second step of the
 502  * initialization. It returns 0 on success. Note that the thread's flag are not
 503  * modified inside this function.
 504  *****************************************************************************/
 505 static int InitThread( vout_thread_t *p_vout )
 506 {
 507     int i, i_aspect_x, i_aspect_y;
 508
 509     vlc_mutex_lock( &p_vout->change_lock );
 510
 511 #ifdef STATS
 512     p_vout->c_loops = 0;
 513 #endif
 514
 515     /* Initialize output method, it allocates direct buffers for us */
 516     if( p_vout->pf_init( p_vout ) )
 517     {
 518         vlc_mutex_unlock( &p_vout->change_lock );
 519         return VLC_EGENERIC;
 520     }
 521
 522     if( !I_OUTPUTPICTURES )
 523     {
 524         msg_Err( p_vout, "plugin was unable to allocate at least "
 525                          "one direct buffer" );
 526         p_vout->pf_end( p_vout );
 527         vlc_mutex_unlock( &p_vout->change_lock );
 528         return VLC_EGENERIC;
 529     }
 530
 531     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 532     {
 533         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 534                          "our internal buffers must have overflown." );
 535         p_vout->pf_end( p_vout );
 536         vlc_mutex_unlock( &p_vout->change_lock );
 537         return VLC_EGENERIC;
 538     }
 539
 540     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 541
 542     AspectRatio( p_vout->fmt_render.i_aspect, &i_aspect_x, &i_aspect_y );
 543
 544     msg_Dbg( p_vout, "picture in %ix%i (%i,%i,%ix%i), "
 545              "chroma %4.4s, ar %i:%i, sar %i:%i",
 546              p_vout->fmt_render.i_width, p_vout->fmt_render.i_height,
 547              p_vout->fmt_render.i_x_offset, p_vout->fmt_render.i_y_offset,
 548              p_vout->fmt_render.i_visible_width,
 549              p_vout->fmt_render.i_visible_height,
 550              (char*)&p_vout->fmt_render.i_chroma,
 551              i_aspect_x, i_aspect_y,
 552              p_vout->fmt_render.i_sar_num, p_vout->fmt_render.i_sar_den );
 553
 554     AspectRatio( p_vout->fmt_in.i_aspect, &i_aspect_x, &i_aspect_y );
 555
 556     msg_Dbg( p_vout, "picture user %ix%i (%i,%i,%ix%i), "
 557              "chroma %4.4s, ar %i:%i, sar %i:%i",
 558              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
 559              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
 560              p_vout->fmt_in.i_visible_width,
 561              p_vout->fmt_in.i_visible_height,
 562              (char*)&p_vout->fmt_in.i_chroma,
 563              i_aspect_x, i_aspect_y,
 564              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
 565
 566     if( !p_vout->fmt_out.i_width || !p_vout->fmt_out.i_height )
 567     {
 568         p_vout->fmt_out.i_width = p_vout->fmt_out.i_visible_width =
 569             p_vout->output.i_width;
 570         p_vout->fmt_out.i_height = p_vout->fmt_out.i_visible_height =
 571             p_vout->output.i_height;
 572         p_vout->fmt_out.i_x_offset =  p_vout->fmt_out.i_y_offset = 0;
 573
 574         p_vout->fmt_out.i_aspect = p_vout->output.i_aspect;
 575         p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 576     }
 577     if( !p_vout->fmt_out.i_sar_num || !p_vout->fmt_out.i_sar_num )
 578     {
 579         p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_aspect *
 580             p_vout->fmt_out.i_height;
 581         p_vout->fmt_out.i_sar_den = VOUT_ASPECT_FACTOR *
 582             p_vout->fmt_out.i_width;
 583     }
 584
 585     vlc_ureduce( &p_vout->fmt_out.i_sar_num, &p_vout->fmt_out.i_sar_den,
 586                  p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den, 0 );
 587
 588     AspectRatio( p_vout->fmt_out.i_aspect, &i_aspect_x, &i_aspect_y );
 589
 590     msg_Dbg( p_vout, "picture out %ix%i (%i,%i,%ix%i), "
 591              "chroma %4.4s, ar %i:%i, sar %i:%i",
 592              p_vout->fmt_out.i_width, p_vout->fmt_out.i_height,
 593              p_vout->fmt_out.i_x_offset, p_vout->fmt_out.i_y_offset,
 594              p_vout->fmt_out.i_visible_width,
 595              p_vout->fmt_out.i_visible_height,
 596              (char*)&p_vout->fmt_out.i_chroma,
 597              i_aspect_x, i_aspect_y,
 598              p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den );
 599
 600     /* Calculate shifts from system-updated masks */
 601     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 602                  p_vout->output.i_rmask );
 603     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 604                  p_vout->output.i_gmask );
 605     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 606                  p_vout->output.i_bmask );
 607
 608     /* Check whether we managed to create direct buffers similar to
 609      * the render buffers, ie same size and chroma */
 610     if( ( p_vout->output.i_width == p_vout->render.i_width )
 611      && ( p_vout->output.i_height == p_vout->render.i_height )
 612      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 613     {
 614         /* Cool ! We have direct buffers, we can ask the decoder to
 615          * directly decode into them ! Map the first render buffers to
 616          * the first direct buffers, but keep the first direct buffer
 617          * for memcpy operations */
 618         p_vout->b_direct = 1;
 619
 620         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 621         {
 622             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 623                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 624                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 625             {
 626                 /* We have enough direct buffers so there's no need to
 627                  * try to use system memory buffers. */
 628                 break;
 629             }
 630             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 631             I_RENDERPICTURES++;
 632         }
 633
 634         msg_Dbg( p_vout, "direct render, mapping "
 635                  "render pictures 0-%i to system pictures 1-%i",
 636                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 637     }
 638     else
 639     {
 640         /* Rats... Something is wrong here, we could not find an output
 641          * plugin able to directly render what we decode. See if we can
 642          * find a chroma plugin to do the conversion */
 643         p_vout->b_direct = 0;
 644
 645         /* Choose the best module */
 646         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 647
 648         if( p_vout->chroma.p_module == NULL )
 649         {
 650             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 651                      (char*)&p_vout->render.i_chroma,
 652                      (char*)&p_vout->output.i_chroma );
 653             p_vout->pf_end( p_vout );
 654             vlc_mutex_unlock( &p_vout->change_lock );
 655             return VLC_EGENERIC;
 656         }
 657
 658         msg_Dbg( p_vout, "indirect render, mapping "
 659                  "render pictures 0-%i to system pictures %i-%i",
 660                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 661                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 662
 663         /* Append render buffers after the direct buffers */
 664         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 665         {
 666             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 667             I_RENDERPICTURES++;
 668
 669             /* Check if we have enough render pictures */
 670             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 671                 break;
 672         }
 673     }
 674
 675     /* Link pictures back to their heap */
 676     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 677     {
 678         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 679     }
 680
 681     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 682     {
 683         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 684     }
 685
 686 /* XXX XXX mark thread ready */
 687     return VLC_SUCCESS;
 688 }
 689
 690 /*****************************************************************************
 691  * RunThread: video output thread
 692  *****************************************************************************
 693  * Video output thread. This function does only returns when the thread is
 694  * terminated. It handles the pictures arriving in the video heap and the
 695  * display device events.
 696  *****************************************************************************/
 697 static void RunThread( vout_thread_t *p_vout)
 698 {
 699     int             i_index;                                /* index in heap */
 700     int             i_idle_loops = 0;  /* loops without displaying a picture */
 701     mtime_t         current_date;                            /* current date */
 702     mtime_t         display_date;                            /* display date */
 703
 704     picture_t *     p_picture;                            /* picture pointer */
 705     picture_t *     p_last_picture = NULL;                   /* last picture */
 706     picture_t *     p_directbuffer;              /* direct buffer to display */
 707
 708     subpicture_t *  p_subpic = NULL;                   /* subpicture pointer */
 709
 710     /*
 711      * Initialize thread
 712      */
 713     p_vout->b_error = InitThread( p_vout );
 714
 715     /* signal the creation of the vout */
 716     vlc_thread_ready( p_vout );
 717
 718     if( p_vout->b_error )
 719     {
 720         /* Destroy thread structures allocated by Create and InitThread */
 721         DestroyThread( p_vout );
 722         return;
 723     }
 724
 725     /*
 726      * Main loop - it is not executed if an error occurred during
 727      * initialization
 728      */
 729     while( (!p_vout->b_die) && (!p_vout->b_error) )
 730     {
 731         /* Initialize loop variables */
 732         p_picture = NULL;
 733         display_date = 0;
 734         current_date = mdate();
 735
 736 #if 0
 737         p_vout->c_loops++;
 738         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 739         {
 740             msg_Dbg( p_vout, "picture heap: %d/%d",
 741                      I_RENDERPICTURES, p_vout->i_heap_size );
 742         }
 743 #endif
 744
 745         /*
 746          * Find the picture to display (the one with the earliest date).
 747          * This operation does not need lock, since only READY_PICTUREs
 748          * are handled. */
 749         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 750         {
 751             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 752                 && ( (p_picture == NULL) ||
 753                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 754             {
 755                 p_picture = PP_RENDERPICTURE[i_index];
 756                 display_date = p_picture->date;
 757             }
 758         }
 759
 760         if( p_picture )
 761         {
 762             /* If we met the last picture, parse again to see whether there is
 763              * a more appropriate one. */
 764             if( p_picture == p_last_picture )
 765             {
 766                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 767                 {
 768                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 769                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 770                         && ((p_picture == p_last_picture) ||
 771                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 772                     {
 773                         p_picture = PP_RENDERPICTURE[i_index];
 774                         display_date = p_picture->date;
 775                     }
 776                 }
 777             }
 778
 779             /* If we found better than the last picture, destroy it */
 780             if( p_last_picture && p_picture != p_last_picture )
 781             {
 782                 vlc_mutex_lock( &p_vout->picture_lock );
 783                 if( p_last_picture->i_refcount )
 784                 {
 785                     p_last_picture->i_status = DISPLAYED_PICTURE;
 786                 }
 787                 else
 788                 {
 789                     p_last_picture->i_status = DESTROYED_PICTURE;
 790                     p_vout->i_heap_size--;
 791                 }
 792                 vlc_mutex_unlock( &p_vout->picture_lock );
 793                 p_last_picture = NULL;
 794             }
 795
 796             /* Compute FPS rate */
 797             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 798                 = display_date;
 799
 800             if( !p_picture->b_force &&
 801                 p_picture != p_last_picture &&
 802                 display_date < current_date + p_vout->render_time )
 803             {
 804                 /* Picture is late: it will be destroyed and the thread
 805                  * will directly choose the next picture */
 806                 vlc_mutex_lock( &p_vout->picture_lock );
 807                 if( p_picture->i_refcount )
 808                 {
 809                     /* Pretend we displayed the picture, but don't destroy
 810                      * it since the decoder might still need it. */
 811                     p_picture->i_status = DISPLAYED_PICTURE;
 812                 }
 813                 else
 814                 {
 815                     /* Destroy the picture without displaying it */
 816                     p_picture->i_status = DESTROYED_PICTURE;
 817                     p_vout->i_heap_size--;
 818                 }
 819                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 820                                   current_date - display_date );
 821                 vlc_mutex_unlock( &p_vout->picture_lock );
 822
 823                 continue;
 824             }
 825
 826             if( display_date >
 827                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 828             {
 829                 /* Picture is waaay too early: it will be destroyed */
 830                 vlc_mutex_lock( &p_vout->picture_lock );
 831                 if( p_picture->i_refcount )
 832                 {
 833                     /* Pretend we displayed the picture, but don't destroy
 834                      * it since the decoder might still need it. */
 835                     p_picture->i_status = DISPLAYED_PICTURE;
 836                 }
 837                 else
 838                 {
 839                     /* Destroy the picture without displaying it */
 840                     p_picture->i_status = DESTROYED_PICTURE;
 841                     p_vout->i_heap_size--;
 842                 }
 843                 msg_Warn( p_vout, "vout warning: early picture skipped "
 844                           "("I64Fd")", display_date - current_date
 845                           - p_vout->i_pts_delay );
 846                 vlc_mutex_unlock( &p_vout->picture_lock );
 847
 848                 continue;
 849             }
 850
 851             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 852             {
 853                 /* A picture is ready to be rendered, but its rendering date
 854                  * is far from the current one so the thread will perform an
 855                  * empty loop as if no picture were found. The picture state
 856                  * is unchanged */
 857                 p_picture    = NULL;
 858                 display_date = 0;
 859             }
 860             else if( p_picture == p_last_picture )
 861             {
 862                 /* We are asked to repeat the previous picture, but we first
 863                  * wait for a couple of idle loops */
 864                 if( i_idle_loops < 4 )
 865                 {
 866                     p_picture    = NULL;
 867                     display_date = 0;
 868                 }
 869                 else
 870                 {
 871                     /* We set the display date to something high, otherwise
 872                      * we'll have lots of problems with late pictures */
 873                     display_date = current_date + p_vout->render_time;
 874                 }
 875             }
 876         }
 877
 878         if( p_picture == NULL )
 879         {
 880             i_idle_loops++;
 881         }
 882
 883         if( p_picture && p_vout->b_snapshot )
 884         {
 885             p_vout->b_snapshot = VLC_FALSE;
 886             vout_Snapshot( p_vout, p_picture );
 887         }
 888
 889         /*
 890          * Check for subpictures to display
 891          */
 892         if( display_date > 0 )
 893         {
 894             p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 895         }
 896
 897         /*
 898          * Perform rendering
 899          */
 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  * InitWindowSize: find the initial dimensions the video window should have.
1233  *****************************************************************************
1234  * This function will check the "width", "height" and "zoom" config options and
1235  * will calculate the size that the video window should have.
1236  *****************************************************************************/
1237 static void InitWindowSize( vout_thread_t *p_vout, unsigned *pi_width,
1238                             unsigned *pi_height )
1239 {
1240     vlc_value_t val;
1241     int i_width, i_height;
1242     uint64_t ll_zoom;
1243
1244 #define FP_FACTOR 1000                             /* our fixed point factor */
1245
1246     var_Get( p_vout, "align", &val );
1247     p_vout->i_alignment = val.i_int;
1248
1249     var_Get( p_vout, "width", &val );
1250     i_width = val.i_int;
1251     var_Get( p_vout, "height", &val );
1252     i_height = val.i_int;
1253     var_Get( p_vout, "zoom", &val );
1254     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1255
1256     if( i_width > 0 && i_height > 0)
1257     {
1258         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1259         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1260         return;
1261     }
1262     else if( i_width > 0 )
1263     {
1264         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1265         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1266                             p_vout->fmt_in.i_aspect / FP_FACTOR );
1267         return;
1268     }
1269     else if( i_height > 0 )
1270     {
1271         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1272         *pi_width = (int)( i_height * ll_zoom * p_vout->fmt_in.i_aspect /
1273                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1274         return;
1275     }
1276
1277     if( p_vout->fmt_in.i_visible_height * p_vout->fmt_in.i_aspect
1278         >= p_vout->fmt_in.i_visible_width * VOUT_ASPECT_FACTOR )
1279     {
1280         *pi_width = (int)( p_vout->fmt_in.i_visible_height * ll_zoom
1281             * p_vout->fmt_in.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1282         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom
1283             / FP_FACTOR );
1284     }
1285     else
1286     {
1287         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom
1288             / FP_FACTOR );
1289         *pi_height = (int)( p_vout->fmt_in.i_visible_width * ll_zoom
1290             * VOUT_ASPECT_FACTOR / p_vout->fmt_in.i_aspect / FP_FACTOR );
1291     }
1292
1293 #undef FP_FACTOR
1294 }
1295
1296 /*****************************************************************************
1297  * vout_VarCallback: generic callback for intf variables
1298  *****************************************************************************/
1299 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1300                       vlc_value_t old_value, vlc_value_t new_value,
1301                       void * unused )
1302 {
1303     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1304     vlc_value_t val;
1305     val.b_bool = VLC_TRUE;
1306     var_Set( p_vout, "intf-change", val );
1307     return VLC_SUCCESS;
1308 }
1309
1310 /*****************************************************************************
1311  * Helper thread for object variables callbacks.
1312  * Only used to avoid deadlocks when using the video embedded mode.
1313  *****************************************************************************/
1314 typedef struct suxor_thread_t
1315 {
1316     VLC_COMMON_MEMBERS
1317     input_thread_t *p_input;
1318
1319 } suxor_thread_t;
1320
1321 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1322 {
1323     vlc_value_t val;
1324
1325     vlc_thread_ready( p_this );
1326
1327     /* Now restart current video stream */
1328     var_Get( p_this->p_input, "video-es", &val );
1329     if( val.i_int >= 0 )
1330     {
1331         vlc_value_t val_es;
1332         val_es.i_int = -VIDEO_ES;
1333         var_Set( p_this->p_input, "video-es", val_es );
1334         var_Set( p_this->p_input, "video-es", val );
1335     }
1336
1337     vlc_object_release( p_this->p_input );
1338
1339 #ifdef WIN32
1340     CloseHandle( p_this->thread_id );
1341 #endif
1342
1343     vlc_object_destroy( p_this );
1344 }
1345
1346 /*****************************************************************************
1347  * object variables callbacks: a bunch of object variables are used by the
1348  * interfaces to interact with the vout.
1349  *****************************************************************************/
1350 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1351                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1352 {
1353     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1354     input_thread_t *p_input;
1355     vlc_value_t val;
1356
1357     char *psz_mode = newval.psz_string;
1358     char *psz_filter, *psz_deinterlace = NULL;
1359
1360     var_Get( p_vout, "vout-filter", &val );
1361     psz_filter = val.psz_string;
1362     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1363
1364     if( !psz_mode || !*psz_mode )
1365     {
1366         if( psz_deinterlace )
1367         {
1368             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1369             if( psz_src[0] == ':' ) psz_src++;
1370             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1371         }
1372     }
1373     else if( !psz_deinterlace )
1374     {
1375         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1376                               sizeof(":deinterlace") );
1377         if( psz_filter && *psz_filter ) strcat( psz_filter, ":" );
1378         strcat( psz_filter, "deinterlace" );
1379     }
1380
1381     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1382                                                  FIND_PARENT );
1383     if( !p_input ) return VLC_EGENERIC;
1384
1385     if( psz_mode && *psz_mode )
1386     {
1387         /* Modify input as well because the vout might have to be restarted */
1388         val.psz_string = psz_mode;
1389         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1390         var_Set( p_input, "deinterlace-mode", val );
1391     }
1392     vlc_object_release( p_input );
1393
1394     val.b_bool = VLC_TRUE;
1395     var_Set( p_vout, "intf-change", val );
1396
1397     val.psz_string = psz_filter;
1398     var_Set( p_vout, "vout-filter", val );
1399     if( psz_filter ) free( psz_filter );
1400
1401     return VLC_SUCCESS;
1402 }
1403
1404 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1405                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1406 {
1407     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1408     input_thread_t *p_input;
1409     vlc_value_t val;
1410
1411     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1412                                                  FIND_PARENT );
1413     if (!p_input)
1414     {
1415         msg_Err( p_vout, "Input not found" );
1416         return( VLC_EGENERIC );
1417     }
1418
1419     val.b_bool = VLC_TRUE;
1420     var_Set( p_vout, "intf-change", val );
1421
1422     /* Modify input as well because the vout might have to be restarted */
1423     val.psz_string = newval.psz_string;
1424     var_Create( p_input, "vout-filter", VLC_VAR_STRING );
1425
1426     var_Set( p_input, "vout-filter", val );
1427
1428     /* Now restart current video stream */
1429     var_Get( p_input, "video-es", &val );
1430     if( val.i_int >= 0 )
1431     {
1432         suxor_thread_t *p_suxor =
1433             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1434         p_suxor->p_input = p_input;
1435         p_vout->b_filter_change = VLC_TRUE;
1436         vlc_object_yield( p_input );
1437         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1438                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1439     }
1440
1441     vlc_object_release( p_input );
1442
1443     return VLC_SUCCESS;
1444 }