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 VideoLAN
   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 *, int *, int * );
  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 != 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     p_vout->render.i_width    = i_width;
 253     p_vout->render.i_height   = i_height;
 254     p_vout->render.i_chroma   = i_chroma;
 255     p_vout->render.i_aspect   = i_aspect;
 256
 257     p_vout->render.i_rmask    = 0;
 258     p_vout->render.i_gmask    = 0;
 259     p_vout->render.i_bmask    = 0;
 260
 261     p_vout->render.i_last_used_pic = -1;
 262     p_vout->render.b_allow_modify_pics = 1;
 263
 264     /* Zero the output heap */
 265     I_OUTPUTPICTURES = 0;
 266     p_vout->output.i_width    = 0;
 267     p_vout->output.i_height   = 0;
 268     p_vout->output.i_chroma   = 0;
 269     p_vout->output.i_aspect   = 0;
 270
 271     p_vout->output.i_rmask    = 0;
 272     p_vout->output.i_gmask    = 0;
 273     p_vout->output.i_bmask    = 0;
 274
 275     /* Initialize misc stuff */
 276     p_vout->i_changes    = 0;
 277     p_vout->f_gamma      = 0;
 278     p_vout->b_grayscale  = 0;
 279     p_vout->b_info       = 0;
 280     p_vout->b_interface  = 0;
 281     p_vout->b_scale      = 1;
 282     p_vout->b_fullscreen = 0;
 283     p_vout->i_alignment  = 0;
 284     p_vout->render_time  = 10;
 285     p_vout->c_fps_samples = 0;
 286     p_vout->b_filter_change = 0;
 287     p_vout->pf_control = 0;
 288     p_vout->p_parent_intf = 0;
 289
 290     /* Initialize locks */
 291     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 292     vlc_mutex_init( p_vout, &p_vout->change_lock );
 293
 294     /* Mouse coordinates */
 295     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 296     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 297     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 298     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 299     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 300
 301     /* Initialize subpicture unit */
 302     p_vout->p_spu = spu_Create( p_vout );
 303     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
 304
 305     /* Attach the new object now so we can use var inheritance below */
 306     vlc_object_attach( p_vout, p_parent );
 307
 308     spu_Init( p_vout->p_spu );
 309
 310     /* Take care of some "interface/control" related initialisations */
 311     vout_IntfInit( p_vout );
 312
 313     p_vout->b_override_aspect = VLC_FALSE;
 314
 315     /* If the parent is not a VOUT object, that means we are at the start of
 316      * the video output pipe */
 317     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 318     {
 319         var_Get( p_vout, "aspect-ratio", &val );
 320
 321         /* Check whether the user tried to override aspect ratio */
 322         if( val.psz_string )
 323         {
 324             unsigned int i_new_aspect = i_aspect;
 325             char *psz_parser = strchr( val.psz_string, ':' );
 326
 327             if( psz_parser )
 328             {
 329                 *psz_parser++ = '\0';
 330                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 331                                                       / atoi( psz_parser );
 332             }
 333             else
 334             {
 335                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 336                                        * atof( val.psz_string )
 337                                        / i_height;
 338             }
 339
 340             free( val.psz_string );
 341
 342             if( i_new_aspect && i_new_aspect != i_aspect )
 343             {
 344                 int i_aspect_x, i_aspect_y;
 345
 346                 AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 347
 348                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 349                          i_aspect_x, i_aspect_y );
 350
 351                 p_vout->render.i_aspect = i_new_aspect;
 352
 353                 p_vout->b_override_aspect = VLC_TRUE;
 354             }
 355         }
 356
 357         /* Look for the default filter configuration */
 358         var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 359         var_Get( p_vout, "vout-filter", &val );
 360         p_vout->psz_filter_chain = val.psz_string;
 361     }
 362     else
 363     {
 364         /* continue the parent's filter chain */
 365         char *psz_end;
 366
 367         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ',' );
 368         if( psz_end && *(psz_end+1) )
 369             p_vout->psz_filter_chain = strdup( psz_end+1 );
 370         else p_vout->psz_filter_chain = NULL;
 371     }
 372
 373     /* Choose the video output module */
 374     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 375     {
 376         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 377         var_Get( p_vout, "vout", &val );
 378         psz_plugin = val.psz_string;
 379     }
 380     else
 381     {
 382         /* the filter chain is a string list of filters separated by double
 383          * colons */
 384         char *psz_end;
 385
 386         psz_end = strchr( p_vout->psz_filter_chain, ',' );
 387         if( psz_end )
 388             psz_plugin = strndup( p_vout->psz_filter_chain,
 389                                   psz_end - p_vout->psz_filter_chain );
 390         else psz_plugin = strdup( p_vout->psz_filter_chain );
 391     }
 392
 393     /* Initialize the dimensions of the video window */
 394     InitWindowSize( p_vout, &p_vout->i_window_width,
 395                     &p_vout->i_window_height );
 396
 397     /* Create the vout thread */
 398     p_vout->p_module = module_Need( p_vout,
 399         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 400         "video filter" : "video output", psz_plugin, 0 );
 401
 402     if( psz_plugin ) free( psz_plugin );
 403     if( p_vout->p_module == NULL )
 404     {
 405         msg_Err( p_vout, "no suitable vout module" );
 406         vlc_object_detach( p_vout );
 407         vlc_object_destroy( p_vout );
 408         return NULL;
 409     }
 410
 411     /* Create a few object variables for interface interaction */
 412     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 413     text.psz_string = _("Deinterlace");
 414     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 415     val.psz_string = ""; text.psz_string = _("Disable");
 416     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 417     val.psz_string = "discard"; text.psz_string = _("Discard");
 418     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 419     val.psz_string = "blend"; text.psz_string = _("Blend");
 420     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 421     val.psz_string = "mean"; text.psz_string = _("Mean");
 422     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 423     val.psz_string = "bob"; text.psz_string = _("Bob");
 424     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 425     val.psz_string = "linear"; text.psz_string = _("Linear");
 426     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 427     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 428     {
 429         var_Set( p_vout, "deinterlace", val );
 430         if( val.psz_string ) free( val.psz_string );
 431     }
 432     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 433
 434
 435     var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 436     text.psz_string = _("Filters");
 437     var_Change( p_vout, "vout-filter", VLC_VAR_SETTEXT, &text, NULL );
 438     var_AddCallback( p_vout, "vout-filter", FilterCallback, NULL );
 439
 440     /* Calculate delay created by internal caching */
 441     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 442                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 443     if( p_input_thread )
 444     {
 445         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 446         vlc_object_release( p_input_thread );
 447     }
 448     else
 449     {
 450         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 451     }
 452
 453     if( vlc_thread_create( p_vout, "video output", RunThread,
 454                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 455     {
 456         msg_Err( p_vout, "out of memory" );
 457         module_Unneed( p_vout, p_vout->p_module );
 458         vlc_object_detach( p_vout );
 459         vlc_object_destroy( p_vout );
 460         return NULL;
 461     }
 462
 463     if( p_vout->b_error )
 464     {
 465         msg_Err( p_vout, "video output creation failed" );
 466
 467         /* Make sure the thread is destroyed */
 468         p_vout->b_die = VLC_TRUE;
 469
 470         vlc_thread_join( p_vout );
 471
 472         vlc_object_detach( p_vout );
 473         vlc_object_destroy( p_vout );
 474         return NULL;
 475     }
 476
 477     return p_vout;
 478 }
 479
 480 /*****************************************************************************
 481  * vout_Destroy: destroys a previously created video output
 482  *****************************************************************************
 483  * Destroy a terminated thread.
 484  * The function will request a destruction of the specified thread. If pi_error
 485  * is NULL, it will return once the thread is destroyed. Else, it will be
 486  * update using one of the THREAD_* constants.
 487  *****************************************************************************/
 488 void vout_Destroy( vout_thread_t *p_vout )
 489 {
 490     vlc_object_t *p_playlist;
 491
 492     /* Request thread destruction */
 493     p_vout->b_die = VLC_TRUE;
 494     vlc_thread_join( p_vout );
 495
 496     var_Destroy( p_vout, "intf-change" );
 497
 498     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 499                                   FIND_ANYWHERE );
 500
 501     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 502
 503     /* Free structure */
 504     vlc_object_destroy( p_vout );
 505
 506     /* If it was the last vout, tell the interface to show up */
 507     if( p_playlist != NULL )
 508     {
 509         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 510                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 511         if( p_another_vout == NULL )
 512         {
 513             vlc_value_t val;
 514             val.b_bool = VLC_TRUE;
 515             var_Set( p_playlist, "intf-show", val );
 516         }
 517         else
 518         {
 519             vlc_object_release( p_another_vout );
 520         }
 521         vlc_object_release( p_playlist );
 522     }
 523 }
 524
 525 /*****************************************************************************
 526  * InitThread: initialize video output thread
 527  *****************************************************************************
 528  * This function is called from RunThread and performs the second step of the
 529  * initialization. It returns 0 on success. Note that the thread's flag are not
 530  * modified inside this function.
 531  *****************************************************************************/
 532 static int InitThread( vout_thread_t *p_vout )
 533 {
 534     int i, i_aspect_x, i_aspect_y;
 535
 536     vlc_mutex_lock( &p_vout->change_lock );
 537
 538 #ifdef STATS
 539     p_vout->c_loops = 0;
 540 #endif
 541
 542     /* Initialize output method, it allocates direct buffers for us */
 543     if( p_vout->pf_init( p_vout ) )
 544     {
 545         vlc_mutex_unlock( &p_vout->change_lock );
 546         return VLC_EGENERIC;
 547     }
 548
 549     if( !I_OUTPUTPICTURES )
 550     {
 551         msg_Err( p_vout, "plugin was unable to allocate at least "
 552                          "one direct buffer" );
 553         p_vout->pf_end( p_vout );
 554         vlc_mutex_unlock( &p_vout->change_lock );
 555         return VLC_EGENERIC;
 556     }
 557
 558     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 559     {
 560         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 561                          "our internal buffers must have overflown." );
 562         p_vout->pf_end( p_vout );
 563         vlc_mutex_unlock( &p_vout->change_lock );
 564         return VLC_EGENERIC;
 565     }
 566
 567     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 568
 569     AspectRatio( p_vout->fmt_render.i_aspect, &i_aspect_x, &i_aspect_y );
 570
 571     msg_Dbg( p_vout, "picture in %ix%i (%i,%i,%ix%i), "
 572              "chroma %4.4s, ar %i:%i, sar %i:%i",
 573              p_vout->fmt_render.i_width, p_vout->fmt_render.i_height,
 574              p_vout->fmt_render.i_x_offset, p_vout->fmt_render.i_y_offset,
 575              p_vout->fmt_render.i_visible_width,
 576              p_vout->fmt_render.i_visible_height,
 577              (char*)&p_vout->fmt_render.i_chroma,
 578              i_aspect_x, i_aspect_y,
 579              p_vout->fmt_render.i_sar_num, p_vout->fmt_render.i_sar_den );
 580
 581     AspectRatio( p_vout->fmt_in.i_aspect, &i_aspect_x, &i_aspect_y );
 582
 583     msg_Dbg( p_vout, "picture user %ix%i (%i,%i,%ix%i), "
 584              "chroma %4.4s, ar %i:%i, sar %i:%i",
 585              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
 586              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
 587              p_vout->fmt_in.i_visible_width,
 588              p_vout->fmt_in.i_visible_height,
 589              (char*)&p_vout->fmt_in.i_chroma,
 590              i_aspect_x, i_aspect_y,
 591              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
 592
 593     if( !p_vout->fmt_out.i_width || !p_vout->fmt_out.i_height )
 594     {
 595         p_vout->fmt_out.i_width = p_vout->fmt_out.i_visible_width =
 596             p_vout->output.i_width;
 597         p_vout->fmt_out.i_height = p_vout->fmt_out.i_visible_height =
 598             p_vout->output.i_height;
 599         p_vout->fmt_out.i_x_offset =  p_vout->fmt_out.i_y_offset = 0;
 600
 601         p_vout->fmt_out.i_aspect = p_vout->output.i_aspect;
 602         p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 603     }
 604     if( !p_vout->fmt_out.i_sar_num || !p_vout->fmt_out.i_sar_num )
 605     {
 606         p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_aspect *
 607             p_vout->fmt_out.i_height;
 608         p_vout->fmt_out.i_sar_den = VOUT_ASPECT_FACTOR *
 609             p_vout->fmt_out.i_width;
 610     }
 611
 612     vlc_reduce( &p_vout->fmt_out.i_sar_num, &p_vout->fmt_out.i_sar_den,
 613                 p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den, 0 );
 614
 615     AspectRatio( p_vout->fmt_out.i_aspect, &i_aspect_x, &i_aspect_y );
 616
 617     msg_Dbg( p_vout, "picture out %ix%i, chroma %4.4s, ar %i:%i, sar %i:%i",
 618              p_vout->output.i_width, p_vout->output.i_height,
 619              (char*)&p_vout->output.i_chroma,
 620              i_aspect_x, i_aspect_y,
 621              p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den );
 622
 623     /* Calculate shifts from system-updated masks */
 624     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 625                  p_vout->output.i_rmask );
 626     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 627                  p_vout->output.i_gmask );
 628     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 629                  p_vout->output.i_bmask );
 630
 631     /* Check whether we managed to create direct buffers similar to
 632      * the render buffers, ie same size and chroma */
 633     if( ( p_vout->output.i_width == p_vout->render.i_width )
 634      && ( p_vout->output.i_height == p_vout->render.i_height )
 635      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 636     {
 637         /* Cool ! We have direct buffers, we can ask the decoder to
 638          * directly decode into them ! Map the first render buffers to
 639          * the first direct buffers, but keep the first direct buffer
 640          * for memcpy operations */
 641         p_vout->b_direct = 1;
 642
 643         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 644         {
 645             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 646                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 647                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 648             {
 649                 /* We have enough direct buffers so there's no need to
 650                  * try to use system memory buffers. */
 651                 break;
 652             }
 653             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 654             I_RENDERPICTURES++;
 655         }
 656
 657         msg_Dbg( p_vout, "direct render, mapping "
 658                  "render pictures 0-%i to system pictures 1-%i",
 659                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 660     }
 661     else
 662     {
 663         /* Rats... Something is wrong here, we could not find an output
 664          * plugin able to directly render what we decode. See if we can
 665          * find a chroma plugin to do the conversion */
 666         p_vout->b_direct = 0;
 667
 668         /* Choose the best module */
 669         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 670
 671         if( p_vout->chroma.p_module == NULL )
 672         {
 673             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 674                      (char*)&p_vout->render.i_chroma,
 675                      (char*)&p_vout->output.i_chroma );
 676             p_vout->pf_end( p_vout );
 677             vlc_mutex_unlock( &p_vout->change_lock );
 678             return VLC_EGENERIC;
 679         }
 680
 681         msg_Dbg( p_vout, "indirect render, mapping "
 682                  "render pictures 0-%i to system pictures %i-%i",
 683                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 684                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 685
 686         /* Append render buffers after the direct buffers */
 687         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 688         {
 689             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 690             I_RENDERPICTURES++;
 691
 692             /* Check if we have enough render pictures */
 693             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 694                 break;
 695         }
 696     }
 697
 698     /* Link pictures back to their heap */
 699     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 700     {
 701         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 702     }
 703
 704     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 705     {
 706         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 707     }
 708
 709 /* XXX XXX mark thread ready */
 710     return VLC_SUCCESS;
 711 }
 712
 713 /*****************************************************************************
 714  * RunThread: video output thread
 715  *****************************************************************************
 716  * Video output thread. This function does only returns when the thread is
 717  * terminated. It handles the pictures arriving in the video heap and the
 718  * display device events.
 719  *****************************************************************************/
 720 static void RunThread( vout_thread_t *p_vout)
 721 {
 722     int             i_index;                                /* index in heap */
 723     int             i_idle_loops = 0;  /* loops without displaying a picture */
 724     mtime_t         current_date;                            /* current date */
 725     mtime_t         display_date;                            /* display date */
 726
 727     picture_t *     p_picture;                            /* picture pointer */
 728     picture_t *     p_last_picture = NULL;                   /* last picture */
 729     picture_t *     p_directbuffer;              /* direct buffer to display */
 730
 731     subpicture_t *  p_subpic;                          /* subpicture pointer */
 732
 733     /*
 734      * Initialize thread
 735      */
 736     p_vout->b_error = InitThread( p_vout );
 737
 738     /* signal the creation of the vout */
 739     vlc_thread_ready( p_vout );
 740
 741     if( p_vout->b_error )
 742     {
 743         /* Destroy thread structures allocated by Create and InitThread */
 744         DestroyThread( p_vout );
 745         return;
 746     }
 747
 748     /*
 749      * Main loop - it is not executed if an error occurred during
 750      * initialization
 751      */
 752     while( (!p_vout->b_die) && (!p_vout->b_error) )
 753     {
 754         /* Initialize loop variables */
 755         p_picture = NULL;
 756         display_date = 0;
 757         current_date = mdate();
 758
 759 #if 0
 760         p_vout->c_loops++;
 761         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 762         {
 763             msg_Dbg( p_vout, "picture heap: %d/%d",
 764                      I_RENDERPICTURES, p_vout->i_heap_size );
 765         }
 766 #endif
 767
 768         /*
 769          * Find the picture to display (the one with the earliest date).
 770          * This operation does not need lock, since only READY_PICTUREs
 771          * are handled. */
 772         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 773         {
 774             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 775                 && ( (p_picture == NULL) ||
 776                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 777             {
 778                 p_picture = PP_RENDERPICTURE[i_index];
 779                 display_date = p_picture->date;
 780             }
 781         }
 782
 783         if( p_picture )
 784         {
 785             /* If we met the last picture, parse again to see whether there is
 786              * a more appropriate one. */
 787             if( p_picture == p_last_picture )
 788             {
 789                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 790                 {
 791                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 792                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 793                         && ((p_picture == p_last_picture) ||
 794                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 795                     {
 796                         p_picture = PP_RENDERPICTURE[i_index];
 797                         display_date = p_picture->date;
 798                     }
 799                 }
 800             }
 801
 802             /* If we found better than the last picture, destroy it */
 803             if( p_last_picture && p_picture != p_last_picture )
 804             {
 805                 vlc_mutex_lock( &p_vout->picture_lock );
 806                 if( p_last_picture->i_refcount )
 807                 {
 808                     p_last_picture->i_status = DISPLAYED_PICTURE;
 809                 }
 810                 else
 811                 {
 812                     p_last_picture->i_status = DESTROYED_PICTURE;
 813                     p_vout->i_heap_size--;
 814                 }
 815                 vlc_mutex_unlock( &p_vout->picture_lock );
 816                 p_last_picture = NULL;
 817             }
 818
 819             /* Compute FPS rate */
 820             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 821                 = display_date;
 822
 823             if( !p_picture->b_force &&
 824                 p_picture != p_last_picture &&
 825                 display_date < current_date + p_vout->render_time )
 826             {
 827                 /* Picture is late: it will be destroyed and the thread
 828                  * will directly choose the next picture */
 829                 vlc_mutex_lock( &p_vout->picture_lock );
 830                 if( p_picture->i_refcount )
 831                 {
 832                     /* Pretend we displayed the picture, but don't destroy
 833                      * it since the decoder might still need it. */
 834                     p_picture->i_status = DISPLAYED_PICTURE;
 835                 }
 836                 else
 837                 {
 838                     /* Destroy the picture without displaying it */
 839                     p_picture->i_status = DESTROYED_PICTURE;
 840                     p_vout->i_heap_size--;
 841                 }
 842                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 843                                   current_date - display_date );
 844                 vlc_mutex_unlock( &p_vout->picture_lock );
 845
 846                 continue;
 847             }
 848
 849             if( display_date >
 850                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 851             {
 852                 /* Picture is waaay too early: it will be destroyed */
 853                 vlc_mutex_lock( &p_vout->picture_lock );
 854                 if( p_picture->i_refcount )
 855                 {
 856                     /* Pretend we displayed the picture, but don't destroy
 857                      * it since the decoder might still need it. */
 858                     p_picture->i_status = DISPLAYED_PICTURE;
 859                 }
 860                 else
 861                 {
 862                     /* Destroy the picture without displaying it */
 863                     p_picture->i_status = DESTROYED_PICTURE;
 864                     p_vout->i_heap_size--;
 865                 }
 866                 msg_Warn( p_vout, "vout warning: early picture skipped "
 867                           "("I64Fd")", display_date - current_date
 868                           - p_vout->i_pts_delay );
 869                 vlc_mutex_unlock( &p_vout->picture_lock );
 870
 871                 continue;
 872             }
 873
 874             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 875             {
 876                 /* A picture is ready to be rendered, but its rendering date
 877                  * is far from the current one so the thread will perform an
 878                  * empty loop as if no picture were found. The picture state
 879                  * is unchanged */
 880                 p_picture    = NULL;
 881                 display_date = 0;
 882             }
 883             else if( p_picture == p_last_picture )
 884             {
 885                 /* We are asked to repeat the previous picture, but we first
 886                  * wait for a couple of idle loops */
 887                 if( i_idle_loops < 4 )
 888                 {
 889                     p_picture    = NULL;
 890                     display_date = 0;
 891                 }
 892                 else
 893                 {
 894                     /* We set the display date to something high, otherwise
 895                      * we'll have lots of problems with late pictures */
 896                     display_date = current_date + p_vout->render_time;
 897                 }
 898             }
 899         }
 900
 901         if( p_picture == NULL )
 902         {
 903             i_idle_loops++;
 904         }
 905
 906         if( p_picture && p_vout->b_snapshot )
 907         {
 908             p_vout->b_snapshot = VLC_FALSE;
 909             vout_Snapshot( p_vout, p_picture );
 910         }
 911
 912         /*
 913          * Check for subpictures to display
 914          */
 915         p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 916
 917         /*
 918          * Perform rendering
 919          */
 920         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 921
 922         /*
 923          * Call the plugin-specific rendering method if there is one
 924          */
 925         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 926         {
 927             /* Render the direct buffer returned by vout_RenderPicture */
 928             p_vout->pf_render( p_vout, p_directbuffer );
 929         }
 930
 931         /*
 932          * Sleep, wake up
 933          */
 934         if( display_date != 0 && p_directbuffer != NULL )
 935         {
 936             mtime_t current_render_time = mdate() - current_date;
 937             /* if render time is very large we don't include it in the mean */
 938             if( current_render_time < p_vout->render_time +
 939                 VOUT_DISPLAY_DELAY )
 940             {
 941                 /* Store render time using a sliding mean weighting to
 942                  * current value in a 3 to 1 ratio*/
 943                 p_vout->render_time *= 3;
 944                 p_vout->render_time += current_render_time;
 945                 p_vout->render_time >>= 2;
 946             }
 947         }
 948
 949         /* Give back change lock */
 950         vlc_mutex_unlock( &p_vout->change_lock );
 951
 952         /* Sleep a while or until a given date */
 953         if( display_date != 0 )
 954         {
 955             /* If there are filters in the chain, better give them the picture
 956              * in advance */
 957             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 958             {
 959                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 960             }
 961         }
 962         else
 963         {
 964             msleep( VOUT_IDLE_SLEEP );
 965         }
 966
 967         /* On awakening, take back lock and send immediately picture
 968          * to display. */
 969         vlc_mutex_lock( &p_vout->change_lock );
 970
 971         /*
 972          * Display the previously rendered picture
 973          */
 974         if( p_picture != NULL && p_directbuffer != NULL )
 975         {
 976             /* Display the direct buffer returned by vout_RenderPicture */
 977             if( p_vout->pf_display )
 978             {
 979                 p_vout->pf_display( p_vout, p_directbuffer );
 980             }
 981
 982             /* Tell the vout this was the last picture and that it does not
 983              * need to be forced anymore. */
 984             p_last_picture = p_picture;
 985             p_last_picture->b_force = 0;
 986         }
 987
 988         if( p_picture != NULL )
 989         {
 990             /* Reinitialize idle loop count */
 991             i_idle_loops = 0;
 992         }
 993
 994         /*
 995          * Check events and manage thread
 996          */
 997         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 998         {
 999             /* A fatal error occurred, and the thread must terminate
1000              * immediately, without displaying anything - setting b_error to 1
1001              * causes the immediate end of the main while() loop. */
1002             p_vout->b_error = 1;
1003         }
1004
1005         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
1006         {
1007             /* this must only happen when the vout plugin is incapable of
1008              * rescaling the picture itself. In this case we need to destroy
1009              * the current picture buffers and recreate new ones with the right
1010              * dimensions */
1011             int i;
1012
1013             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1014
1015             p_vout->pf_end( p_vout );
1016             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1017                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1018
1019             I_OUTPUTPICTURES = 0;
1020             if( p_vout->pf_init( p_vout ) )
1021             {
1022                 msg_Err( p_vout, "cannot resize display" );
1023                 /* FIXME: pf_end will be called again in EndThread() */
1024                 p_vout->b_error = 1;
1025             }
1026
1027             /* Need to reinitialise the chroma plugin */
1028             if( p_vout->chroma.p_module )
1029             {
1030                 if( p_vout->chroma.p_module->pf_deactivate )
1031                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1032                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1033             }
1034         }
1035
1036         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1037         {
1038             /* This happens when the picture buffers need to be recreated.
1039              * This is useful on multimonitor displays for instance.
1040              *
1041              * Warning: This only works when the vout creates only 1 picture
1042              * buffer!! */
1043             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1044
1045             if( !p_vout->b_direct )
1046             {
1047                 module_Unneed( p_vout, p_vout->chroma.p_module );
1048             }
1049
1050             vlc_mutex_lock( &p_vout->picture_lock );
1051
1052             p_vout->pf_end( p_vout );
1053
1054             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1055
1056             p_vout->b_error = InitThread( p_vout );
1057
1058             vlc_mutex_unlock( &p_vout->picture_lock );
1059         }
1060     }
1061
1062     /*
1063      * Error loop - wait until the thread destruction is requested
1064      */
1065     if( p_vout->b_error )
1066     {
1067         ErrorThread( p_vout );
1068     }
1069
1070     /* End of thread */
1071     EndThread( p_vout );
1072
1073     /* Destroy thread structures allocated by CreateThread */
1074     DestroyThread( p_vout );
1075 }
1076
1077 /*****************************************************************************
1078  * ErrorThread: RunThread() error loop
1079  *****************************************************************************
1080  * This function is called when an error occurred during thread main's loop.
1081  * The thread can still receive feed, but must be ready to terminate as soon
1082  * as possible.
1083  *****************************************************************************/
1084 static void ErrorThread( vout_thread_t *p_vout )
1085 {
1086     /* Wait until a `die' order */
1087     while( !p_vout->b_die )
1088     {
1089         /* Sleep a while */
1090         msleep( VOUT_IDLE_SLEEP );
1091     }
1092 }
1093
1094 /*****************************************************************************
1095  * EndThread: thread destruction
1096  *****************************************************************************
1097  * This function is called when the thread ends after a sucessful
1098  * initialization. It frees all resources allocated by InitThread.
1099  *****************************************************************************/
1100 static void EndThread( vout_thread_t *p_vout )
1101 {
1102     int     i_index;                                        /* index in heap */
1103
1104 #ifdef STATS
1105     {
1106         struct tms cpu_usage;
1107         times( &cpu_usage );
1108
1109         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1110                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1111     }
1112 #endif
1113
1114     if( !p_vout->b_direct )
1115     {
1116         module_Unneed( p_vout, p_vout->chroma.p_module );
1117     }
1118
1119     /* Destroy all remaining pictures */
1120     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1121     {
1122         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1123         {
1124             free( p_vout->p_picture[i_index].p_data_orig );
1125         }
1126     }
1127
1128     /* Destroy subpicture unit */
1129     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1130     spu_Destroy( p_vout->p_spu );
1131
1132     /* Destroy translation tables */
1133     p_vout->pf_end( p_vout );
1134
1135     /* Release the change lock */
1136     vlc_mutex_unlock( &p_vout->change_lock );
1137 }
1138
1139 /*****************************************************************************
1140  * DestroyThread: thread destruction
1141  *****************************************************************************
1142  * This function is called when the thread ends. It frees all ressources
1143  * allocated by CreateThread. Status is available at this stage.
1144  *****************************************************************************/
1145 static void DestroyThread( vout_thread_t *p_vout )
1146 {
1147     /* Destroy the locks */
1148     vlc_mutex_destroy( &p_vout->picture_lock );
1149     vlc_mutex_destroy( &p_vout->change_lock );
1150
1151     /* Release the module */
1152     if( p_vout && p_vout->p_module )
1153     {
1154         module_Unneed( p_vout, p_vout->p_module );
1155     }
1156 }
1157
1158 /* following functions are local */
1159
1160 static int ReduceHeight( int i_ratio )
1161 {
1162     int i_dummy = VOUT_ASPECT_FACTOR;
1163     int i_pgcd  = 1;
1164
1165     if( !i_ratio )
1166     {
1167         return i_pgcd;
1168     }
1169
1170     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1171     while( !(i_ratio & 1) && !(i_dummy & 1) )
1172     {
1173         i_ratio >>= 1;
1174         i_dummy >>= 1;
1175         i_pgcd  <<= 1;
1176     }
1177
1178     while( !(i_ratio % 3) && !(i_dummy % 3) )
1179     {
1180         i_ratio /= 3;
1181         i_dummy /= 3;
1182         i_pgcd  *= 3;
1183     }
1184
1185     while( !(i_ratio % 5) && !(i_dummy % 5) )
1186     {
1187         i_ratio /= 5;
1188         i_dummy /= 5;
1189         i_pgcd  *= 5;
1190     }
1191
1192     return i_pgcd;
1193 }
1194
1195 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1196 {
1197     unsigned int i_pgcd = ReduceHeight( i_aspect );
1198     *i_aspect_x = i_aspect / i_pgcd;
1199     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1200 }
1201
1202 /*****************************************************************************
1203  * BinaryLog: computes the base 2 log of a binary value
1204  *****************************************************************************
1205  * This functions is used by MaskToShift, to get a bit index from a binary
1206  * value.
1207  *****************************************************************************/
1208 static int BinaryLog( uint32_t i )
1209 {
1210     int i_log = 0;
1211
1212     if( i == 0 ) return -31337;
1213
1214     if( i & 0xffff0000 ) i_log += 16;
1215     if( i & 0xff00ff00 ) i_log += 8;
1216     if( i & 0xf0f0f0f0 ) i_log += 4;
1217     if( i & 0xcccccccc ) i_log += 2;
1218     if( i & 0xaaaaaaaa ) i_log += 1;
1219
1220     return i_log;
1221 }
1222
1223 /*****************************************************************************
1224  * MaskToShift: transform a color mask into right and left shifts
1225  *****************************************************************************
1226  * This function is used for obtaining color shifts from masks.
1227  *****************************************************************************/
1228 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1229 {
1230     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1231
1232     if( !i_mask )
1233     {
1234         *pi_left = *pi_right = 0;
1235         return;
1236     }
1237
1238     /* Get bits */
1239     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1240     i_high = i_mask + i_low;                       /* higher bit of the mask */
1241
1242     /* Transform bits into an index */
1243     i_low =  BinaryLog (i_low);
1244     i_high = BinaryLog (i_high);
1245
1246     /* Update pointers and return */
1247     *pi_left =   i_low;
1248     *pi_right = (8 - i_high + i_low);
1249 }
1250
1251 /*****************************************************************************
1252  * InitWindowSize: find the initial dimensions the video window should have.
1253  *****************************************************************************
1254  * This function will check the "width", "height" and "zoom" config options and
1255  * will calculate the size that the video window should have.
1256  *****************************************************************************/
1257 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1258                             int *pi_height )
1259 {
1260     vlc_value_t val;
1261     int i_width, i_height;
1262     uint64_t ll_zoom;
1263
1264 #define FP_FACTOR 1000                             /* our fixed point factor */
1265
1266     var_Get( p_vout, "align", &val );
1267     p_vout->i_alignment = val.i_int;
1268
1269     var_Get( p_vout, "width", &val );
1270     i_width = val.i_int;
1271     var_Get( p_vout, "height", &val );
1272     i_height = val.i_int;
1273     var_Get( p_vout, "zoom", &val );
1274     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1275
1276     if( i_width > 0 && i_height > 0)
1277     {
1278         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1279         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1280         return;
1281     }
1282     else if( i_width > 0 )
1283     {
1284         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1285         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1286                             p_vout->render.i_aspect / FP_FACTOR );
1287         return;
1288     }
1289     else if( i_height > 0 )
1290     {
1291         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1292         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1293                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1294         return;
1295     }
1296
1297     if( p_vout->render.i_height * p_vout->render.i_aspect
1298         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1299     {
1300         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1301           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1302         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1303     }
1304     else
1305     {
1306         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1307         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1308           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1309     }
1310
1311 #undef FP_FACTOR
1312 }
1313
1314 /*****************************************************************************
1315  * vout_VarCallback: generic callback for intf variables
1316  *****************************************************************************/
1317 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1318                       vlc_value_t old_value, vlc_value_t new_value,
1319                       void * unused )
1320 {
1321     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1322     vlc_value_t val;
1323     val.b_bool = VLC_TRUE;
1324     var_Set( p_vout, "intf-change", val );
1325     return VLC_SUCCESS;
1326 }
1327
1328 /*****************************************************************************
1329  * Helper thread for object variables callbacks.
1330  * Only used to avoid deadlocks when using the video embedded mode.
1331  *****************************************************************************/
1332 typedef struct suxor_thread_t
1333 {
1334     VLC_COMMON_MEMBERS
1335     input_thread_t *p_input;
1336
1337 } suxor_thread_t;
1338
1339 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1340 {
1341     vlc_value_t val;
1342
1343     vlc_thread_ready( p_this );
1344
1345     /* Now restart current video stream */
1346     var_Get( p_this->p_input, "video-es", &val );
1347     if( val.i_int >= 0 )
1348     {
1349         vlc_value_t val_es;
1350         val_es.i_int = -VIDEO_ES;
1351         var_Set( p_this->p_input, "video-es", val_es );
1352         var_Set( p_this->p_input, "video-es", val );
1353     }
1354
1355     vlc_object_release( p_this->p_input );
1356
1357 #ifdef WIN32
1358     CloseHandle( p_this->thread_id );
1359 #endif
1360
1361     vlc_object_destroy( p_this );
1362 }
1363
1364 /*****************************************************************************
1365  * object variables callbacks: a bunch of object variables are used by the
1366  * interfaces to interact with the vout.
1367  *****************************************************************************/
1368 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1369                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1370 {
1371     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1372     input_thread_t *p_input;
1373     vlc_value_t val;
1374
1375     char *psz_mode = newval.psz_string;
1376     char *psz_filter, *psz_deinterlace = NULL;
1377
1378     var_Get( p_vout, "vout-filter", &val );
1379     psz_filter = val.psz_string;
1380     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1381
1382     if( !psz_mode || !*psz_mode )
1383     {
1384         if( psz_deinterlace )
1385         {
1386             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1387             if( psz_src[0] == ',' ) psz_src++;
1388             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1389         }
1390     }
1391     else if( !psz_deinterlace )
1392     {
1393         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1394                               sizeof(",deinterlace") );
1395         if( psz_filter && *psz_filter ) strcat( psz_filter, "," );
1396         strcat( psz_filter, "deinterlace" );
1397     }
1398
1399     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1400                                                  FIND_PARENT );
1401     if( !p_input ) return VLC_EGENERIC;
1402
1403     if( psz_mode && *psz_mode )
1404     {
1405         /* Modify input as well because the vout might have to be restarted */
1406         val.psz_string = psz_mode;
1407         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1408         var_Set( p_input, "deinterlace-mode", val );
1409     }
1410     vlc_object_release( p_input );
1411
1412     val.b_bool = VLC_TRUE;
1413     var_Set( p_vout, "intf-change", val );
1414
1415     val.psz_string = psz_filter;
1416     var_Set( p_vout, "vout-filter", val );
1417     if( psz_filter ) free( psz_filter );
1418
1419     return VLC_SUCCESS;
1420 }
1421
1422 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1423                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1424 {
1425     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1426     input_thread_t *p_input;
1427     vlc_value_t val;
1428
1429     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1430                                                  FIND_PARENT );
1431     if (!p_input)
1432     {
1433         msg_Err( p_vout, "Input not found" );
1434         return( VLC_EGENERIC );
1435     }
1436
1437     val.b_bool = VLC_TRUE;
1438     var_Set( p_vout, "intf-change", val );
1439
1440     /* Modify input as well because the vout might have to be restarted */
1441     val.psz_string = newval.psz_string;
1442     var_Create( p_input, "vout-filter", VLC_VAR_STRING );
1443
1444     var_Set( p_input, "vout-filter", val );
1445
1446     /* Now restart current video stream */
1447     var_Get( p_input, "video-es", &val );
1448     if( val.i_int >= 0 )
1449     {
1450         suxor_thread_t *p_suxor =
1451             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1452         p_suxor->p_input = p_input;
1453         p_vout->b_filter_change = VLC_TRUE;
1454         vlc_object_yield( p_input );
1455         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1456                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1457     }
1458
1459     vlc_object_release( p_input );
1460
1461     return VLC_SUCCESS;
1462 }