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

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  * This module describes the programming interface for video output threads.
   4  * It includes functions allowing to open a new thread, send pictures to a
   5  * thread, and destroy a previously oppened video output thread.
   6  *****************************************************************************
   7  * Copyright (C) 2000-2004 VideoLAN
   8  * $Id$
   9  *
  10  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include <stdlib.h>                                                /* free() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #ifdef HAVE_SYS_TIMES_H
  35 #   include <sys/times.h>
  36 #endif
  37
  38 #include "vlc_video.h"
  39 #include "video_output.h"
  40 #include "vlc_spu.h"
  41 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  42
  43 #if defined( SYS_DARWIN )
  44 #include "darwin_specific.h"
  45 #endif
  46
  47 /*****************************************************************************
  48  * Local prototypes
  49  *****************************************************************************/
  50 static int      InitThread        ( vout_thread_t * );
  51 static void     RunThread         ( vout_thread_t * );
  52 static void     ErrorThread       ( vout_thread_t * );
  53 static void     EndThread         ( vout_thread_t * );
  54 static void     DestroyThread     ( vout_thread_t * );
  55
  56 static void     AspectRatio       ( int, int *, int * );
  57 static int      BinaryLog         ( uint32_t );
  58 static void     MaskToShift       ( int *, int *, uint32_t );
  59 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  60
  61 /* Object variables callbacks */
  62 static int DeinterlaceCallback( vlc_object_t *, char const *,
  63                                 vlc_value_t, vlc_value_t, void * );
  64 static int FilterCallback( vlc_object_t *, char const *,
  65                            vlc_value_t, vlc_value_t, void * );
  66
  67 /*****************************************************************************
  68  * vout_Request: find a video output thread, create one, or destroy one.
  69  *****************************************************************************
  70  * This function looks for a video output thread matching the current
  71  * properties. If not found, it spawns a new one.
  72  *****************************************************************************/
  73 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  74                                  unsigned int i_width, unsigned int i_height,
  75                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  76 {
  77     if( !i_width || !i_height || !i_chroma )
  78     {
  79         /* Reattach video output to input before bailing out */
  80         if( p_vout )
  81         {
  82             vlc_object_t *p_playlist;
  83
  84             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
  85                                           FIND_ANYWHERE );
  86
  87             if( p_playlist )
  88             {
  89                 spu_Attach( p_vout->p_spu, p_this, VLC_FALSE );
  90                 vlc_object_detach( p_vout );
  91                 vlc_object_attach( p_vout, p_playlist );
  92
  93                 vlc_object_release( p_playlist );
  94             }
  95             else
  96             {
  97                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
  98                 vlc_object_detach( p_vout );
  99                 vout_Destroy( p_vout );
 100             }
 101         }
 102         return NULL;
 103     }
 104
 105     /* If a video output was provided, lock it, otherwise look for one. */
 106     if( p_vout )
 107     {
 108         vlc_object_yield( p_vout );
 109     }
 110     else
 111     {
 112         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 113
 114         if( !p_vout )
 115         {
 116             vlc_object_t *p_playlist;
 117
 118             p_playlist = vlc_object_find( p_this,
 119                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 120             if( p_playlist )
 121             {
 122                 p_vout = vlc_object_find( p_playlist,
 123                                           VLC_OBJECT_VOUT, FIND_CHILD );
 124                 /* only first children of p_input for unused vout */
 125                 if( p_vout && p_vout->p_parent != p_playlist )
 126                 {
 127                     vlc_object_release( p_vout );
 128                     p_vout = NULL;
 129                 }
 130                 vlc_object_release( p_playlist );
 131             }
 132         }
 133     }
 134
 135     /* If we now have a video output, check it has the right properties */
 136     if( p_vout )
 137     {
 138         char *psz_filter_chain;
 139
 140         /* We don't directly check for the "filter" variable for obvious
 141          * performance reasons. */
 142         if( p_vout->b_filter_change )
 143         {
 144             psz_filter_chain = config_GetPsz( p_this, "filter" );
 145
 146             if( psz_filter_chain && !*psz_filter_chain )
 147             {
 148                 free( psz_filter_chain );
 149                 psz_filter_chain = NULL;
 150             }
 151             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 152             {
 153                 free( p_vout->psz_filter_chain );
 154                 p_vout->psz_filter_chain = NULL;
 155             }
 156
 157             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 158                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 159                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 160             {
 161                 p_vout->b_filter_change = VLC_FALSE;
 162             }
 163
 164             if( psz_filter_chain ) free( psz_filter_chain );
 165         }
 166
 167         if( ( p_vout->render.i_width != i_width ) ||
 168             ( p_vout->render.i_height != i_height ) ||
 169             ( p_vout->render.i_chroma != i_chroma ) ||
 170             ( p_vout->render.i_aspect != i_aspect
 171                     && !p_vout->b_override_aspect ) ||
 172             p_vout->b_filter_change )
 173         {
 174             /* We are not interested in this format, close this vout */
 175             vlc_object_detach( p_vout );
 176             vlc_object_release( p_vout );
 177             vout_Destroy( p_vout );
 178             p_vout = NULL;
 179         }
 180         else
 181         {
 182             /* This video output is cool! Hijack it. */
 183             vlc_object_detach( p_vout );
 184             spu_Attach( p_vout->p_spu, p_this, VLC_TRUE );
 185             vlc_object_attach( p_vout, p_this );
 186             vlc_object_release( p_vout );
 187         }
 188     }
 189
 190     if( !p_vout )
 191     {
 192         msg_Dbg( p_this, "no usable vout present, spawning one" );
 193
 194         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 195     }
 196
 197     return p_vout;
 198 }
 199
 200 /*****************************************************************************
 201  * vout_Create: creates a new video output thread
 202  *****************************************************************************
 203  * This function creates a new video output thread, and returns a pointer
 204  * to its description. On error, it returns NULL.
 205  *****************************************************************************/
 206 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 207                                unsigned int i_width, unsigned int i_height,
 208                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 209 {
 210     vout_thread_t  * p_vout;                            /* thread descriptor */
 211     input_thread_t * p_input_thread;
 212     int              i_index;                               /* loop variable */
 213     char           * psz_plugin;
 214     vlc_value_t      val, text;
 215
 216     /* Allocate descriptor */
 217     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 218     if( p_vout == NULL )
 219     {
 220         msg_Err( p_parent, "out of memory" );
 221         return NULL;
 222     }
 223
 224     /* Initialize pictures - translation tables and functions
 225      * will be initialized later in InitThread */
 226     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 227     {
 228         p_vout->p_picture[i_index].pf_lock = NULL;
 229         p_vout->p_picture[i_index].pf_unlock = NULL;
 230         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 231         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 232         p_vout->p_picture[i_index].b_slow   = 0;
 233     }
 234
 235     /* No images in the heap */
 236     p_vout->i_heap_size = 0;
 237
 238     /* Initialize the rendering heap */
 239     I_RENDERPICTURES = 0;
 240     p_vout->render.i_width    = i_width;
 241     p_vout->render.i_height   = i_height;
 242     p_vout->render.i_chroma   = i_chroma;
 243     p_vout->render.i_aspect   = i_aspect;
 244
 245     p_vout->render.i_rmask    = 0;
 246     p_vout->render.i_gmask    = 0;
 247     p_vout->render.i_bmask    = 0;
 248
 249     p_vout->render.i_last_used_pic = -1;
 250     p_vout->render.b_allow_modify_pics = 1;
 251
 252     /* Zero the output heap */
 253     I_OUTPUTPICTURES = 0;
 254     p_vout->output.i_width    = 0;
 255     p_vout->output.i_height   = 0;
 256     p_vout->output.i_chroma   = 0;
 257     p_vout->output.i_aspect   = 0;
 258
 259     p_vout->output.i_rmask    = 0;
 260     p_vout->output.i_gmask    = 0;
 261     p_vout->output.i_bmask    = 0;
 262
 263     /* Initialize misc stuff */
 264     p_vout->i_changes    = 0;
 265     p_vout->f_gamma      = 0;
 266     p_vout->b_grayscale  = 0;
 267     p_vout->b_info       = 0;
 268     p_vout->b_interface  = 0;
 269     p_vout->b_scale      = 1;
 270     p_vout->b_fullscreen = 0;
 271     p_vout->i_alignment  = 0;
 272     p_vout->render_time  = 10;
 273     p_vout->c_fps_samples = 0;
 274     p_vout->b_filter_change = 0;
 275     p_vout->pf_control = 0;
 276     p_vout->p_parent_intf = 0;
 277
 278     /* Initialize locks */
 279     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 280     vlc_mutex_init( p_vout, &p_vout->change_lock );
 281
 282     /* Mouse coordinates */
 283     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 284     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 285     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 286     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 287     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 288
 289     /* Initialize subpicture unit */
 290     p_vout->p_spu = spu_Init( p_vout );
 291     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
 292
 293     /* Attach the new object now so we can use var inheritance below */
 294     vlc_object_attach( p_vout, p_parent );
 295
 296     /* Take care of some "interface/control" related initialisations */
 297     vout_IntfInit( p_vout );
 298
 299     p_vout->b_override_aspect = VLC_FALSE;
 300
 301     /* If the parent is not a VOUT object, that means we are at the start of
 302      * the video output pipe */
 303     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 304     {
 305         var_Get( p_vout, "aspect-ratio", &val );
 306
 307         /* Check whether the user tried to override aspect ratio */
 308         if( val.psz_string )
 309         {
 310             unsigned int i_new_aspect = i_aspect;
 311             char *psz_parser = strchr( val.psz_string, ':' );
 312
 313             if( psz_parser )
 314             {
 315                 *psz_parser++ = '\0';
 316                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 317                                                       / atoi( psz_parser );
 318             }
 319             else
 320             {
 321                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 322                                        * atof( val.psz_string )
 323                                        / i_height;
 324             }
 325
 326             free( val.psz_string );
 327
 328             if( i_new_aspect && i_new_aspect != i_aspect )
 329             {
 330                 int i_aspect_x, i_aspect_y;
 331
 332                 AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 333
 334                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 335                          i_aspect_x, i_aspect_y );
 336
 337                 p_vout->render.i_aspect = i_new_aspect;
 338
 339                 p_vout->b_override_aspect = VLC_TRUE;
 340             }
 341         }
 342
 343         /* Look for the default filter configuration */
 344         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 345         var_Get( p_vout, "filter", &val );
 346         p_vout->psz_filter_chain = val.psz_string;
 347     }
 348     else
 349     {
 350         /* continue the parent's filter chain */
 351         char *psz_end;
 352
 353         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 354         if( psz_end && *(psz_end+1) )
 355             p_vout->psz_filter_chain = strdup( psz_end+1 );
 356         else p_vout->psz_filter_chain = NULL;
 357     }
 358
 359     /* Choose the video output module */
 360     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 361     {
 362         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 363         var_Get( p_vout, "vout", &val );
 364         psz_plugin = val.psz_string;
 365     }
 366     else
 367     {
 368         /* the filter chain is a string list of filters separated by double
 369          * colons */
 370         char *psz_end;
 371
 372         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 373         if( psz_end )
 374             psz_plugin = strndup( p_vout->psz_filter_chain,
 375                                   psz_end - p_vout->psz_filter_chain );
 376         else psz_plugin = strdup( p_vout->psz_filter_chain );
 377     }
 378
 379     /* Initialize the dimensions of the video window */
 380     InitWindowSize( p_vout, &p_vout->i_window_width,
 381                     &p_vout->i_window_height );
 382
 383     /* Create the vout thread */
 384     p_vout->p_module = module_Need( p_vout,
 385         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 386         "video filter" : "video output", psz_plugin, 0 );
 387
 388     if( psz_plugin ) free( psz_plugin );
 389     if( p_vout->p_module == NULL )
 390     {
 391         msg_Err( p_vout, "no suitable vout module" );
 392         vlc_object_detach( p_vout );
 393         vlc_object_destroy( p_vout );
 394         return NULL;
 395     }
 396
 397     /* Create a few object variables for interface interaction */
 398     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 399     text.psz_string = _("Deinterlace");
 400     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 401     val.psz_string = ""; text.psz_string = _("Disable");
 402     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 403     val.psz_string = "discard"; text.psz_string = _("Discard");
 404     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 405     val.psz_string = "blend"; text.psz_string = _("Blend");
 406     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 407     val.psz_string = "mean"; text.psz_string = _("Mean");
 408     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 409     val.psz_string = "bob"; text.psz_string = _("Bob");
 410     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 411     val.psz_string = "linear"; text.psz_string = _("Linear");
 412     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 413     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 414     {
 415         var_Set( p_vout, "deinterlace", val );
 416         if( val.psz_string ) free( val.psz_string );
 417     }
 418     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 419
 420
 421     var_Create( p_vout, "filter", VLC_VAR_STRING );
 422     text.psz_string = _("Filters");
 423     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 424     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 425     if( val.psz_string )
 426     {
 427         var_Set( p_vout, "filter", val );
 428         free( val.psz_string );
 429     }
 430     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 431
 432     /* Calculate delay created by internal caching */
 433     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 434                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 435     if( p_input_thread )
 436     {
 437         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 438         vlc_object_release( p_input_thread );
 439     }
 440     else
 441     {
 442         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 443     }
 444
 445     if( vlc_thread_create( p_vout, "video output", RunThread,
 446                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 447     {
 448         msg_Err( p_vout, "out of memory" );
 449         module_Unneed( p_vout, p_vout->p_module );
 450         vlc_object_detach( p_vout );
 451         vlc_object_destroy( p_vout );
 452         return NULL;
 453     }
 454
 455     if( p_vout->b_error )
 456     {
 457         msg_Err( p_vout, "video output creation failed" );
 458
 459         /* Make sure the thread is destroyed */
 460         p_vout->b_die = VLC_TRUE;
 461
 462         vlc_thread_join( p_vout );
 463
 464         vlc_object_detach( p_vout );
 465         vlc_object_destroy( p_vout );
 466         return NULL;
 467     }
 468
 469     return p_vout;
 470 }
 471
 472 /*****************************************************************************
 473  * vout_Destroy: destroys a previously created video output
 474  *****************************************************************************
 475  * Destroy a terminated thread.
 476  * The function will request a destruction of the specified thread. If pi_error
 477  * is NULL, it will return once the thread is destroyed. Else, it will be
 478  * update using one of the THREAD_* constants.
 479  *****************************************************************************/
 480 void vout_Destroy( vout_thread_t *p_vout )
 481 {
 482     vlc_object_t *p_playlist;
 483
 484     /* Request thread destruction */
 485     p_vout->b_die = VLC_TRUE;
 486     vlc_thread_join( p_vout );
 487
 488     var_Destroy( p_vout, "intf-change" );
 489
 490     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 491                                   FIND_ANYWHERE );
 492
 493     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 494
 495     /* Free structure */
 496     vlc_object_destroy( p_vout );
 497
 498     /* If it was the last vout, tell the interface to show up */
 499     if( p_playlist != NULL )
 500     {
 501         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 502                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 503         if( p_another_vout == NULL )
 504         {
 505             vlc_value_t val;
 506             val.b_bool = VLC_TRUE;
 507             var_Set( p_playlist, "intf-show", val );
 508         }
 509         else
 510         {
 511             vlc_object_release( p_another_vout );
 512         }
 513         vlc_object_release( p_playlist );
 514     }
 515 }
 516
 517 /*****************************************************************************
 518  * InitThread: initialize video output thread
 519  *****************************************************************************
 520  * This function is called from RunThread and performs the second step of the
 521  * initialization. It returns 0 on success. Note that the thread's flag are not
 522  * modified inside this function.
 523  *****************************************************************************/
 524 static int InitThread( vout_thread_t *p_vout )
 525 {
 526     int i, i_aspect_x, i_aspect_y;
 527
 528     vlc_mutex_lock( &p_vout->change_lock );
 529
 530 #ifdef STATS
 531     p_vout->c_loops = 0;
 532 #endif
 533
 534     /* Initialize output method, it allocates direct buffers for us */
 535     if( p_vout->pf_init( p_vout ) )
 536     {
 537         vlc_mutex_unlock( &p_vout->change_lock );
 538         return VLC_EGENERIC;
 539     }
 540
 541     if( !I_OUTPUTPICTURES )
 542     {
 543         msg_Err( p_vout, "plugin was unable to allocate at least "
 544                          "one direct buffer" );
 545         p_vout->pf_end( p_vout );
 546         vlc_mutex_unlock( &p_vout->change_lock );
 547         return VLC_EGENERIC;
 548     }
 549
 550     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 551     {
 552         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 553                          "our internal buffers must have overflown." );
 554         p_vout->pf_end( p_vout );
 555         vlc_mutex_unlock( &p_vout->change_lock );
 556         return VLC_EGENERIC;
 557     }
 558
 559     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 560
 561 #if 0
 562     if( !p_vout->psz_filter_chain )
 563     {
 564         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 565
 566         if( psz_aspect )
 567         {
 568             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 569                                                       * atof( psz_aspect )
 570                                                       / p_vout->output.i_height;
 571             free( psz_aspect );
 572
 573             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 574             {
 575                 AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 576
 577                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 578                          i_aspect_x, i_aspect_y );
 579                 p_vout->output.i_aspect = i_new_aspect;
 580             }
 581         }
 582     }
 583 #endif
 584
 585     AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 586     msg_Dbg( p_vout,
 587              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 588              p_vout->render.i_width, p_vout->render.i_height,
 589              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 590              i_aspect_x, i_aspect_y );
 591
 592     AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 593     msg_Dbg( p_vout,
 594              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 595              p_vout->output.i_width, p_vout->output.i_height,
 596              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 597              i_aspect_x, i_aspect_y );
 598
 599     /* Calculate shifts from system-updated masks */
 600     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 601                  p_vout->output.i_rmask );
 602     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 603                  p_vout->output.i_gmask );
 604     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 605                  p_vout->output.i_bmask );
 606
 607     /* Check whether we managed to create direct buffers similar to
 608      * the render buffers, ie same size and chroma */
 609     if( ( p_vout->output.i_width == p_vout->render.i_width )
 610      && ( p_vout->output.i_height == p_vout->render.i_height )
 611      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 612     {
 613         /* Cool ! We have direct buffers, we can ask the decoder to
 614          * directly decode into them ! Map the first render buffers to
 615          * the first direct buffers, but keep the first direct buffer
 616          * for memcpy operations */
 617         p_vout->b_direct = 1;
 618
 619         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 620         {
 621             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 622                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 623                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 624             {
 625                 /* We have enough direct buffers so there's no need to
 626                  * try to use system memory buffers. */
 627                 break;
 628             }
 629             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 630             I_RENDERPICTURES++;
 631         }
 632
 633         msg_Dbg( p_vout, "direct render, mapping "
 634                  "render pictures 0-%i to system pictures 1-%i",
 635                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 636     }
 637     else
 638     {
 639         /* Rats... Something is wrong here, we could not find an output
 640          * plugin able to directly render what we decode. See if we can
 641          * find a chroma plugin to do the conversion */
 642         p_vout->b_direct = 0;
 643
 644         /* Choose the best module */
 645         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 646
 647         if( p_vout->chroma.p_module == NULL )
 648         {
 649             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 650                      (char*)&p_vout->render.i_chroma,
 651                      (char*)&p_vout->output.i_chroma );
 652             p_vout->pf_end( p_vout );
 653             vlc_mutex_unlock( &p_vout->change_lock );
 654             return VLC_EGENERIC;
 655         }
 656
 657         msg_Dbg( p_vout, "indirect render, mapping "
 658                  "render pictures 0-%i to system pictures %i-%i",
 659                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 660                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 661
 662         /* Append render buffers after the direct buffers */
 663         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 664         {
 665             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 666             I_RENDERPICTURES++;
 667
 668             /* Check if we have enough render pictures */
 669             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 670                 break;
 671         }
 672     }
 673
 674     /* Link pictures back to their heap */
 675     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 676     {
 677         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 678     }
 679
 680     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 681     {
 682         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 683     }
 684
 685 /* XXX XXX mark thread ready */
 686     return VLC_SUCCESS;
 687 }
 688
 689 /*****************************************************************************
 690  * RunThread: video output thread
 691  *****************************************************************************
 692  * Video output thread. This function does only returns when the thread is
 693  * terminated. It handles the pictures arriving in the video heap and the
 694  * display device events.
 695  *****************************************************************************/
 696 static void RunThread( vout_thread_t *p_vout)
 697 {
 698     int             i_index;                                /* index in heap */
 699     int             i_idle_loops = 0;  /* loops without displaying a picture */
 700     mtime_t         current_date;                            /* current date */
 701     mtime_t         display_date;                            /* display date */
 702
 703     picture_t *     p_picture;                            /* picture pointer */
 704     picture_t *     p_last_picture = NULL;                   /* last picture */
 705     picture_t *     p_directbuffer;              /* direct buffer to display */
 706
 707     subpicture_t *  p_subpic;                          /* subpicture pointer */
 708
 709     /*
 710      * Initialize thread
 711      */
 712     p_vout->b_error = InitThread( p_vout );
 713
 714     /* signal the creation of the vout */
 715     vlc_thread_ready( p_vout );
 716
 717     if( p_vout->b_error )
 718     {
 719         /* Destroy thread structures allocated by Create and InitThread */
 720         DestroyThread( p_vout );
 721         return;
 722     }
 723
 724     /*
 725      * Main loop - it is not executed if an error occurred during
 726      * initialization
 727      */
 728     while( (!p_vout->b_die) && (!p_vout->b_error) )
 729     {
 730         /* Initialize loop variables */
 731         p_picture = NULL;
 732         display_date = 0;
 733         current_date = mdate();
 734
 735 #if 0
 736         p_vout->c_loops++;
 737         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 738         {
 739             msg_Dbg( p_vout, "picture heap: %d/%d",
 740                      I_RENDERPICTURES, p_vout->i_heap_size );
 741         }
 742 #endif
 743
 744         /*
 745          * Find the picture to display (the one with the earliest date).
 746          * This operation does not need lock, since only READY_PICTUREs
 747          * are handled. */
 748         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 749         {
 750             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 751                 && ( (p_picture == NULL) ||
 752                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 753             {
 754                 p_picture = PP_RENDERPICTURE[i_index];
 755                 display_date = p_picture->date;
 756             }
 757         }
 758
 759         if( p_picture )
 760         {
 761             /* If we met the last picture, parse again to see whether there is
 762              * a more appropriate one. */
 763             if( p_picture == p_last_picture )
 764             {
 765                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 766                 {
 767                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 768                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 769                         && ((p_picture == p_last_picture) ||
 770                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 771                     {
 772                         p_picture = PP_RENDERPICTURE[i_index];
 773                         display_date = p_picture->date;
 774                     }
 775                 }
 776             }
 777
 778             /* If we found better than the last picture, destroy it */
 779             if( p_last_picture && p_picture != p_last_picture )
 780             {
 781                 vlc_mutex_lock( &p_vout->picture_lock );
 782                 if( p_last_picture->i_refcount )
 783                 {
 784                     p_last_picture->i_status = DISPLAYED_PICTURE;
 785                 }
 786                 else
 787                 {
 788                     p_last_picture->i_status = DESTROYED_PICTURE;
 789                     p_vout->i_heap_size--;
 790                 }
 791                 vlc_mutex_unlock( &p_vout->picture_lock );
 792                 p_last_picture = NULL;
 793             }
 794
 795             /* Compute FPS rate */
 796             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 797                 = display_date;
 798
 799             if( !p_picture->b_force &&
 800                 p_picture != p_last_picture &&
 801                 display_date < current_date + p_vout->render_time )
 802             {
 803                 /* Picture is late: it will be destroyed and the thread
 804                  * will directly choose the next picture */
 805                 vlc_mutex_lock( &p_vout->picture_lock );
 806                 if( p_picture->i_refcount )
 807                 {
 808                     /* Pretend we displayed the picture, but don't destroy
 809                      * it since the decoder might still need it. */
 810                     p_picture->i_status = DISPLAYED_PICTURE;
 811                 }
 812                 else
 813                 {
 814                     /* Destroy the picture without displaying it */
 815                     p_picture->i_status = DESTROYED_PICTURE;
 816                     p_vout->i_heap_size--;
 817                 }
 818                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 819                                   current_date - display_date );
 820                 vlc_mutex_unlock( &p_vout->picture_lock );
 821
 822                 continue;
 823             }
 824
 825             if( display_date >
 826                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 827             {
 828                 /* Picture is waaay too early: it will be destroyed */
 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, "vout warning: early picture skipped "
 843                           "("I64Fd")", display_date - current_date
 844                           - p_vout->i_pts_delay );
 845                 vlc_mutex_unlock( &p_vout->picture_lock );
 846
 847                 continue;
 848             }
 849
 850             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 851             {
 852                 /* A picture is ready to be rendered, but its rendering date
 853                  * is far from the current one so the thread will perform an
 854                  * empty loop as if no picture were found. The picture state
 855                  * is unchanged */
 856                 p_picture    = NULL;
 857                 display_date = 0;
 858             }
 859             else if( p_picture == p_last_picture )
 860             {
 861                 /* We are asked to repeat the previous picture, but we first
 862                  * wait for a couple of idle loops */
 863                 if( i_idle_loops < 4 )
 864                 {
 865                     p_picture    = NULL;
 866                     display_date = 0;
 867                 }
 868                 else
 869                 {
 870                     /* We set the display date to something high, otherwise
 871                      * we'll have lots of problems with late pictures */
 872                     display_date = current_date + p_vout->render_time;
 873                 }
 874             }
 875         }
 876
 877         if( p_picture == NULL )
 878         {
 879             i_idle_loops++;
 880         }
 881
 882         /*
 883          * Check for subpictures to display
 884          */
 885         p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 886
 887         /*
 888          * Perform rendering
 889          */
 890         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 891
 892         /*
 893          * Call the plugin-specific rendering method if there is one
 894          */
 895         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 896         {
 897             /* Render the direct buffer returned by vout_RenderPicture */
 898             p_vout->pf_render( p_vout, p_directbuffer );
 899         }
 900
 901         /*
 902          * Sleep, wake up
 903          */
 904         if( display_date != 0 && p_directbuffer != NULL )
 905         {
 906             mtime_t current_render_time = mdate() - current_date;
 907             /* if render time is very large we don't include it in the mean */
 908             if( current_render_time < p_vout->render_time +
 909                 VOUT_DISPLAY_DELAY )
 910             {
 911                 /* Store render time using a sliding mean weighting to
 912                  * current value in a 3 to 1 ratio*/
 913                 p_vout->render_time *= 3;
 914                 p_vout->render_time += current_render_time;
 915                 p_vout->render_time >>= 2;
 916             }
 917         }
 918
 919         /* Give back change lock */
 920         vlc_mutex_unlock( &p_vout->change_lock );
 921
 922         /* Sleep a while or until a given date */
 923         if( display_date != 0 )
 924         {
 925             /* If there are filters in the chain, better give them the picture
 926              * in advance */
 927             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 928             {
 929                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 930             }
 931         }
 932         else
 933         {
 934             msleep( VOUT_IDLE_SLEEP );
 935         }
 936
 937         /* On awakening, take back lock and send immediately picture
 938          * to display. */
 939         vlc_mutex_lock( &p_vout->change_lock );
 940
 941         /*
 942          * Display the previously rendered picture
 943          */
 944         if( p_picture != NULL && p_directbuffer != NULL )
 945         {
 946             /* Display the direct buffer returned by vout_RenderPicture */
 947             if( p_vout->pf_display )
 948             {
 949                 p_vout->pf_display( p_vout, p_directbuffer );
 950             }
 951
 952             /* Tell the vout this was the last picture and that it does not
 953              * need to be forced anymore. */
 954             p_last_picture = p_picture;
 955             p_last_picture->b_force = 0;
 956         }
 957
 958         if( p_picture != NULL )
 959         {
 960             /* Reinitialize idle loop count */
 961             i_idle_loops = 0;
 962         }
 963
 964         /*
 965          * Check events and manage thread
 966          */
 967         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 968         {
 969             /* A fatal error occurred, and the thread must terminate
 970              * immediately, without displaying anything - setting b_error to 1
 971              * causes the immediate end of the main while() loop. */
 972             p_vout->b_error = 1;
 973         }
 974
 975         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 976         {
 977             /* this must only happen when the vout plugin is incapable of
 978              * rescaling the picture itself. In this case we need to destroy
 979              * the current picture buffers and recreate new ones with the right
 980              * dimensions */
 981             int i;
 982
 983             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 984
 985             p_vout->pf_end( p_vout );
 986             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 987                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 988
 989             I_OUTPUTPICTURES = 0;
 990             if( p_vout->pf_init( p_vout ) )
 991             {
 992                 msg_Err( p_vout, "cannot resize display" );
 993                 /* FIXME: pf_end will be called again in EndThread() */
 994                 p_vout->b_error = 1;
 995             }
 996
 997             /* Need to reinitialise the chroma plugin */
 998             if( p_vout->chroma.p_module )
 999             {
1000                 if( p_vout->chroma.p_module->pf_deactivate )
1001                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1002                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1003             }
1004         }
1005
1006         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1007         {
1008             /* This happens when the picture buffers need to be recreated.
1009              * This is useful on multimonitor displays for instance.
1010              *
1011              * Warning: This only works when the vout creates only 1 picture
1012              * buffer!! */
1013             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1014
1015             if( !p_vout->b_direct )
1016             {
1017                 module_Unneed( p_vout, p_vout->chroma.p_module );
1018             }
1019
1020             vlc_mutex_lock( &p_vout->picture_lock );
1021
1022             p_vout->pf_end( p_vout );
1023
1024             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1025
1026             p_vout->b_error = InitThread( p_vout );
1027
1028             vlc_mutex_unlock( &p_vout->picture_lock );
1029         }
1030     }
1031
1032     /*
1033      * Error loop - wait until the thread destruction is requested
1034      */
1035     if( p_vout->b_error )
1036     {
1037         ErrorThread( p_vout );
1038     }
1039
1040     /* End of thread */
1041     EndThread( p_vout );
1042
1043     /* Destroy thread structures allocated by CreateThread */
1044     DestroyThread( p_vout );
1045 }
1046
1047 /*****************************************************************************
1048  * ErrorThread: RunThread() error loop
1049  *****************************************************************************
1050  * This function is called when an error occurred during thread main's loop.
1051  * The thread can still receive feed, but must be ready to terminate as soon
1052  * as possible.
1053  *****************************************************************************/
1054 static void ErrorThread( vout_thread_t *p_vout )
1055 {
1056     /* Wait until a `die' order */
1057     while( !p_vout->b_die )
1058     {
1059         /* Sleep a while */
1060         msleep( VOUT_IDLE_SLEEP );
1061     }
1062 }
1063
1064 /*****************************************************************************
1065  * EndThread: thread destruction
1066  *****************************************************************************
1067  * This function is called when the thread ends after a sucessful
1068  * initialization. It frees all resources allocated by InitThread.
1069  *****************************************************************************/
1070 static void EndThread( vout_thread_t *p_vout )
1071 {
1072     int     i_index;                                        /* index in heap */
1073
1074 #ifdef STATS
1075     {
1076         struct tms cpu_usage;
1077         times( &cpu_usage );
1078
1079         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1080                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1081     }
1082 #endif
1083
1084     if( !p_vout->b_direct )
1085     {
1086         module_Unneed( p_vout, p_vout->chroma.p_module );
1087     }
1088
1089     /* Destroy all remaining pictures */
1090     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1091     {
1092         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1093         {
1094             free( p_vout->p_picture[i_index].p_data_orig );
1095         }
1096     }
1097
1098     /* Destroy subpicture unit */
1099     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1100     spu_Destroy( p_vout->p_spu );
1101
1102     /* Destroy translation tables */
1103     p_vout->pf_end( p_vout );
1104
1105     /* Release the change lock */
1106     vlc_mutex_unlock( &p_vout->change_lock );
1107 }
1108
1109 /*****************************************************************************
1110  * DestroyThread: thread destruction
1111  *****************************************************************************
1112  * This function is called when the thread ends. It frees all ressources
1113  * allocated by CreateThread. Status is available at this stage.
1114  *****************************************************************************/
1115 static void DestroyThread( vout_thread_t *p_vout )
1116 {
1117     /* Destroy the locks */
1118     vlc_mutex_destroy( &p_vout->picture_lock );
1119     vlc_mutex_destroy( &p_vout->change_lock );
1120
1121     /* Release the module */
1122     if( p_vout && p_vout->p_module )
1123     {
1124         module_Unneed( p_vout, p_vout->p_module );
1125     }
1126 }
1127
1128 /* following functions are local */
1129
1130 static int ReduceHeight( int i_ratio )
1131 {
1132     int i_dummy = VOUT_ASPECT_FACTOR;
1133     int i_pgcd  = 1;
1134
1135     if( !i_ratio )
1136     {
1137         return i_pgcd;
1138     }
1139
1140     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1141     while( !(i_ratio & 1) && !(i_dummy & 1) )
1142     {
1143         i_ratio >>= 1;
1144         i_dummy >>= 1;
1145         i_pgcd  <<= 1;
1146     }
1147
1148     while( !(i_ratio % 3) && !(i_dummy % 3) )
1149     {
1150         i_ratio /= 3;
1151         i_dummy /= 3;
1152         i_pgcd  *= 3;
1153     }
1154
1155     while( !(i_ratio % 5) && !(i_dummy % 5) )
1156     {
1157         i_ratio /= 5;
1158         i_dummy /= 5;
1159         i_pgcd  *= 5;
1160     }
1161
1162     return i_pgcd;
1163 }
1164
1165 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1166 {
1167     unsigned int i_pgcd = ReduceHeight( i_aspect );
1168     *i_aspect_x = i_aspect / i_pgcd;
1169     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1170 }
1171
1172 /*****************************************************************************
1173  * BinaryLog: computes the base 2 log of a binary value
1174  *****************************************************************************
1175  * This functions is used by MaskToShift, to get a bit index from a binary
1176  * value.
1177  *****************************************************************************/
1178 static int BinaryLog( uint32_t i )
1179 {
1180     int i_log = 0;
1181
1182     if( i == 0 ) return -31337;
1183
1184     if( i & 0xffff0000 ) i_log += 16;
1185     if( i & 0xff00ff00 ) i_log += 8;
1186     if( i & 0xf0f0f0f0 ) i_log += 4;
1187     if( i & 0xcccccccc ) i_log += 2;
1188     if( i & 0xaaaaaaaa ) i_log += 1;
1189
1190     return i_log;
1191 }
1192
1193 /*****************************************************************************
1194  * MaskToShift: transform a color mask into right and left shifts
1195  *****************************************************************************
1196  * This function is used for obtaining color shifts from masks.
1197  *****************************************************************************/
1198 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1199 {
1200     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1201
1202     if( !i_mask )
1203     {
1204         *pi_left = *pi_right = 0;
1205         return;
1206     }
1207
1208     /* Get bits */
1209     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1210     i_high = i_mask + i_low;                       /* higher bit of the mask */
1211
1212     /* Transform bits into an index */
1213     i_low =  BinaryLog (i_low);
1214     i_high = BinaryLog (i_high);
1215
1216     /* Update pointers and return */
1217     *pi_left =   i_low;
1218     *pi_right = (8 - i_high + i_low);
1219 }
1220
1221 /*****************************************************************************
1222  * InitWindowSize: find the initial dimensions the video window should have.
1223  *****************************************************************************
1224  * This function will check the "width", "height" and "zoom" config options and
1225  * will calculate the size that the video window should have.
1226  *****************************************************************************/
1227 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1228                             int *pi_height )
1229 {
1230     vlc_value_t val;
1231     int i_width, i_height;
1232     uint64_t ll_zoom;
1233
1234 #define FP_FACTOR 1000                             /* our fixed point factor */
1235
1236     var_Get( p_vout, "align", &val );
1237     p_vout->i_alignment = val.i_int;
1238
1239     var_Get( p_vout, "width", &val );
1240     i_width = val.i_int;
1241     var_Get( p_vout, "height", &val );
1242     i_height = val.i_int;
1243     var_Get( p_vout, "zoom", &val );
1244     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1245
1246     if( i_width > 0 && i_height > 0)
1247     {
1248         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1249         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1250         return;
1251     }
1252     else if( i_width > 0 )
1253     {
1254         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1255         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1256                             p_vout->render.i_aspect / FP_FACTOR );
1257         return;
1258     }
1259     else if( i_height > 0 )
1260     {
1261         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1262         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1263                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1264         return;
1265     }
1266
1267     if( p_vout->render.i_height * p_vout->render.i_aspect
1268         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1269     {
1270         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1271           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1272         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1273     }
1274     else
1275     {
1276         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1277         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1278           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1279     }
1280
1281 #undef FP_FACTOR
1282 }
1283
1284 /*****************************************************************************
1285  * vout_VarCallback: generic callback for intf variables
1286  *****************************************************************************/
1287 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1288                       vlc_value_t old_value, vlc_value_t new_value,
1289                       void * unused )
1290 {
1291     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1292     vlc_value_t val;
1293     val.b_bool = VLC_TRUE;
1294     var_Set( p_vout, "intf-change", val );
1295     return VLC_SUCCESS;
1296 }
1297
1298 /*****************************************************************************
1299  * object variables callbacks: a bunch of object variables are used by the
1300  * interfaces to interact with the vout.
1301  *****************************************************************************/
1302 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1303                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1304 {
1305     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1306     input_thread_t *p_input;
1307     vlc_value_t val;
1308
1309     char *psz_mode = newval.psz_string;
1310     char *psz_filter;
1311
1312     psz_filter = config_GetPsz( p_vout, "filter" );
1313
1314     if( !psz_mode || !*psz_mode )
1315     {
1316         config_PutPsz( p_vout, "filter", "" );
1317     }
1318     else
1319     {
1320         if( !psz_filter || !*psz_filter )
1321         {
1322             config_PutPsz( p_vout, "filter", "deinterlace" );
1323         }
1324         else
1325         {
1326             if( strstr( psz_filter, "deinterlace" ) == NULL )
1327             {
1328                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1329                 strcat( psz_filter, ",deinterlace" );
1330             }
1331             config_PutPsz( p_vout, "filter", psz_filter );
1332         }
1333     }
1334
1335     if( psz_filter ) free( psz_filter );
1336
1337
1338     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1339                                                  FIND_PARENT );
1340     if( !p_input ) return VLC_EGENERIC;
1341
1342     if( psz_mode && *psz_mode )
1343     {
1344         val.psz_string = psz_mode;
1345         var_Set( p_vout, "deinterlace-mode", val );
1346         /* Modify input as well because the vout might have to be restarted */
1347         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1348         var_Set( p_input, "deinterlace-mode", val );
1349     }
1350
1351     /* Now restart current video stream */
1352     var_Get( p_input, "video-es", &val );
1353     if( val.i_int >= 0 )
1354     {
1355         p_vout->b_filter_change = VLC_TRUE;
1356         var_Set( p_input, "video-es", (vlc_value_t)-VIDEO_ES );
1357         var_Set( p_input, "video-es", val );
1358     }
1359
1360     vlc_object_release( p_input );
1361
1362     val.b_bool = VLC_TRUE;
1363     var_Set( p_vout, "intf-change", val );
1364     return VLC_SUCCESS;
1365 }
1366
1367 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1368                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1369 {
1370     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1371     input_thread_t *p_input;
1372     vlc_value_t val;
1373
1374     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1375                                                  FIND_PARENT );
1376
1377     if (!p_input)
1378     {
1379         msg_Err( p_vout, "Input not found" );
1380         return( VLC_EGENERIC );
1381     }
1382
1383     /* Now restart current video stream */
1384     var_Get( p_input, "video-es", &val );
1385     if( val.i_int >= 0 )
1386     {
1387         p_vout->b_filter_change = VLC_TRUE;
1388         var_Set( p_input, "video-es", (vlc_value_t)-VIDEO_ES );
1389         var_Set( p_input, "video-es", val );
1390     }
1391
1392     vlc_object_release( p_input );
1393
1394     val.b_bool = VLC_TRUE;
1395     var_Set( p_vout, "intf-change", val );
1396     return VLC_SUCCESS;
1397 }