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/input.h>                 /* for input_thread_t and i_pts_delay */
  41
  42 #if defined( SYS_DARWIN )
  43 #include "darwin_specific.h"
  44 #endif
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int      InitThread        ( vout_thread_t * );
  50 static void     RunThread         ( vout_thread_t * );
  51 static void     ErrorThread       ( vout_thread_t * );
  52 static void     EndThread         ( vout_thread_t * );
  53 static void     DestroyThread     ( vout_thread_t * );
  54
  55 static int      ReduceHeight      ( int );
  56 static int      BinaryLog         ( uint32_t );
  57 static void     MaskToShift       ( int *, int *, uint32_t );
  58 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  59
  60 /* Object variables callbacks */
  61 static int DeinterlaceCallback( vlc_object_t *, char const *,
  62                                 vlc_value_t, vlc_value_t, void * );
  63 static int FilterCallback( vlc_object_t *, char const *,
  64                            vlc_value_t, vlc_value_t, void * );
  65
  66 /**
  67  * vout_AspectRatio
  68  *
  69  * Set the i_aspect_x and i_aspect_y from i_aspect.
  70  */
  71 void vout_AspectRatio( unsigned int i_aspect,
  72                        /*out*/ unsigned int *i_aspect_x,
  73                        /*out*/ unsigned int *i_aspect_y )
  74 {
  75   unsigned int i_pgcd = ReduceHeight( i_aspect );
  76   *i_aspect_x = i_aspect / i_pgcd;
  77   *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
  78 }
  79
  80 /*****************************************************************************
  81  * vout_Request: find a video output thread, create one, or destroy one.
  82  *****************************************************************************
  83  * This function looks for a video output thread matching the current
  84  * properties. If not found, it spawns a new one.
  85  *****************************************************************************/
  86 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  87                                  unsigned int i_width, unsigned int i_height,
  88                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  89 {
  90     if( !i_width || !i_height || !i_chroma )
  91     {
  92         /* Reattach video output to input before bailing out */
  93         if( p_vout )
  94         {
  95             vlc_object_t *p_playlist;
  96
  97             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
  98                                           FIND_ANYWHERE );
  99
 100             if( p_playlist )
 101             {
 102                 vout_AttachSPU( p_vout, VLC_FALSE );
 103                 vlc_object_detach( p_vout );
 104                 vlc_object_attach( p_vout, p_playlist );
 105
 106                 vlc_object_release( p_playlist );
 107             }
 108             else
 109             {
 110                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 111                 vlc_object_detach( p_vout );
 112                 vout_Destroy( p_vout );
 113             }
 114         }
 115         return NULL;
 116     }
 117
 118     /* If a video output was provided, lock it, otherwise look for one. */
 119     if( p_vout )
 120     {
 121         vlc_object_yield( p_vout );
 122     }
 123     else
 124     {
 125         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 126
 127         if( !p_vout )
 128         {
 129             vlc_object_t *p_playlist;
 130
 131             p_playlist = vlc_object_find( p_this,
 132                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 133             if( p_playlist )
 134             {
 135                 p_vout = vlc_object_find( p_playlist,
 136                                           VLC_OBJECT_VOUT, FIND_CHILD );
 137                 /* only first children of p_input for unused vout */
 138                 if( p_vout && p_vout->p_parent != p_playlist )
 139                 {
 140                     vlc_object_release( p_vout );
 141                     p_vout = NULL;
 142                 }
 143                 vlc_object_release( p_playlist );
 144             }
 145         }
 146     }
 147
 148     /* If we now have a video output, check it has the right properties */
 149     if( p_vout )
 150     {
 151         char *psz_filter_chain;
 152
 153         /* We don't directly check for the "filter" variable for obvious
 154          * performance reasons. */
 155         if( p_vout->b_filter_change )
 156         {
 157             psz_filter_chain = config_GetPsz( p_this, "filter" );
 158
 159             if( psz_filter_chain && !*psz_filter_chain )
 160             {
 161                 free( psz_filter_chain );
 162                 psz_filter_chain = NULL;
 163             }
 164             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 165             {
 166                 free( p_vout->psz_filter_chain );
 167                 p_vout->psz_filter_chain = NULL;
 168             }
 169
 170             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 171                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 172                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 173             {
 174                 p_vout->b_filter_change = VLC_FALSE;
 175             }
 176
 177             if( psz_filter_chain ) free( psz_filter_chain );
 178         }
 179
 180         if( ( p_vout->render.i_width != i_width ) ||
 181             ( p_vout->render.i_height != i_height ) ||
 182             ( p_vout->render.i_chroma != i_chroma ) ||
 183             ( p_vout->render.i_aspect != i_aspect
 184                     && !p_vout->b_override_aspect ) ||
 185             p_vout->b_filter_change )
 186         {
 187             /* We are not interested in this format, close this vout */
 188             vlc_object_detach( p_vout );
 189             vlc_object_release( p_vout );
 190             vout_Destroy( p_vout );
 191             p_vout = NULL;
 192         }
 193         else
 194         {
 195             /* This video output is cool! Hijack it. */
 196             vlc_object_detach( p_vout );
 197             vlc_object_attach( p_vout, p_this );
 198             vout_AttachSPU( p_vout, VLC_TRUE );
 199             vlc_object_release( p_vout );
 200         }
 201     }
 202
 203     if( !p_vout )
 204     {
 205         msg_Dbg( p_this, "no usable vout present, spawning one" );
 206
 207         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 208     }
 209
 210     return p_vout;
 211 }
 212
 213 /*****************************************************************************
 214  * vout_Create: creates a new video output thread
 215  *****************************************************************************
 216  * This function creates a new video output thread, and returns a pointer
 217  * to its description. On error, it returns NULL.
 218  *****************************************************************************/
 219 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 220                                unsigned int i_width, unsigned int i_height,
 221                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 222 {
 223     vout_thread_t  * p_vout;                            /* thread descriptor */
 224     input_thread_t * p_input_thread;
 225     int              i_index;                               /* loop variable */
 226     char           * psz_plugin;
 227     vlc_value_t      val, text;
 228
 229     /* Allocate descriptor */
 230     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 231     if( p_vout == NULL )
 232     {
 233         msg_Err( p_parent, "out of memory" );
 234         return NULL;
 235     }
 236
 237     /* Initialize pictures - translation tables and functions
 238      * will be initialized later in InitThread */
 239     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 240     {
 241         p_vout->p_picture[i_index].pf_lock = NULL;
 242         p_vout->p_picture[i_index].pf_unlock = NULL;
 243         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 244         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 245         p_vout->p_picture[i_index].b_slow   = 0;
 246     }
 247
 248     /* No images in the heap */
 249     p_vout->i_heap_size = 0;
 250
 251     /* Register the default subpicture channel */
 252     p_vout->p_default_channel = NULL;
 253     p_vout->i_channel_count = 1;
 254
 255     /* Initialize the rendering heap */
 256     I_RENDERPICTURES = 0;
 257     p_vout->render.i_width    = i_width;
 258     p_vout->render.i_height   = i_height;
 259     p_vout->render.i_chroma   = i_chroma;
 260     p_vout->render.i_aspect   = i_aspect;
 261
 262     p_vout->render.i_rmask    = 0;
 263     p_vout->render.i_gmask    = 0;
 264     p_vout->render.i_bmask    = 0;
 265
 266     p_vout->render.i_last_used_pic = -1;
 267     p_vout->render.b_allow_modify_pics = 1;
 268
 269     /* Zero the output heap */
 270     I_OUTPUTPICTURES = 0;
 271     p_vout->output.i_width    = 0;
 272     p_vout->output.i_height   = 0;
 273     p_vout->output.i_chroma   = 0;
 274     p_vout->output.i_aspect   = 0;
 275
 276     p_vout->output.i_rmask    = 0;
 277     p_vout->output.i_gmask    = 0;
 278     p_vout->output.i_bmask    = 0;
 279
 280     /* Initialize misc stuff */
 281     p_vout->i_changes    = 0;
 282     p_vout->f_gamma      = 0;
 283     p_vout->b_grayscale  = 0;
 284     p_vout->b_info       = 0;
 285     p_vout->b_interface  = 0;
 286     p_vout->b_scale      = 1;
 287     p_vout->b_fullscreen = 0;
 288     p_vout->i_alignment  = 0;
 289     p_vout->render_time  = 10;
 290     p_vout->c_fps_samples = 0;
 291     p_vout->b_filter_change = 0;
 292     p_vout->pf_control = 0;
 293     p_vout->p_parent_intf = 0;
 294
 295     /* Initialize locks */
 296     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 297     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 298     vlc_mutex_init( p_vout, &p_vout->change_lock );
 299
 300     /* Attach the new object now so we can use var inheritance below */
 301     vlc_object_attach( p_vout, p_parent );
 302
 303     /* Take care of some "interface/control" related initialisations */
 304     vout_IntfInit( p_vout );
 305
 306     p_vout->b_override_aspect = VLC_FALSE;
 307
 308     /* If the parent is not a VOUT object, that means we are at the start of
 309      * the video output pipe */
 310     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 311     {
 312         var_Get( p_vout, "aspect-ratio", &val );
 313
 314         /* Check whether the user tried to override aspect ratio */
 315         if( val.psz_string )
 316         {
 317             unsigned int i_new_aspect = i_aspect;
 318             char *psz_parser = strchr( val.psz_string, ':' );
 319
 320             if( psz_parser )
 321             {
 322                 *psz_parser++ = '\0';
 323                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 324                                                       / atoi( psz_parser );
 325             }
 326             else
 327             {
 328                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 329                                        * atof( val.psz_string )
 330                                        / i_height;
 331             }
 332
 333             free( val.psz_string );
 334
 335             if( i_new_aspect && i_new_aspect != i_aspect )
 336             {
 337                 unsigned int i_aspect_x, i_aspect_y;
 338
 339                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 340
 341                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 342                          i_aspect_x, i_aspect_y );
 343
 344                 p_vout->render.i_aspect = i_new_aspect;
 345
 346                 p_vout->b_override_aspect = VLC_TRUE;
 347             }
 348         }
 349
 350         /* Look for the default filter configuration */
 351         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 352         var_Get( p_vout, "filter", &val );
 353         p_vout->psz_filter_chain = val.psz_string;
 354     }
 355     else
 356     {
 357         /* continue the parent's filter chain */
 358         char *psz_end;
 359
 360         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 361         if( psz_end && *(psz_end+1) )
 362             p_vout->psz_filter_chain = strdup( psz_end+1 );
 363         else p_vout->psz_filter_chain = NULL;
 364     }
 365
 366     /* Choose the video output module */
 367     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 368     {
 369         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 370         var_Get( p_vout, "vout", &val );
 371         psz_plugin = val.psz_string;
 372     }
 373     else
 374     {
 375         /* the filter chain is a string list of filters separated by double
 376          * colons */
 377         char *psz_end;
 378
 379         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 380         if( psz_end )
 381             psz_plugin = strndup( p_vout->psz_filter_chain,
 382                                   psz_end - p_vout->psz_filter_chain );
 383         else psz_plugin = strdup( p_vout->psz_filter_chain );
 384     }
 385
 386     /* Initialize the dimensions of the video window */
 387     InitWindowSize( p_vout, &p_vout->i_window_width,
 388                     &p_vout->i_window_height );
 389
 390     /* Create the vout thread */
 391     p_vout->p_module = module_Need( p_vout,
 392         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 393         "video filter" : "video output", psz_plugin, 0 );
 394
 395     if( psz_plugin ) free( psz_plugin );
 396     if( p_vout->p_module == NULL )
 397     {
 398         msg_Err( p_vout, "no suitable vout module" );
 399         vlc_object_detach( p_vout );
 400         vlc_object_destroy( p_vout );
 401         return NULL;
 402     }
 403
 404     /* Initialize subpicture unit */
 405     vout_InitSPU( p_vout );
 406
 407     /* Create a few object variables for interface interaction */
 408     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 409     text.psz_string = _("Deinterlace");
 410     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 411     val.psz_string = ""; text.psz_string = _("Disable");
 412     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 413     val.psz_string = "discard"; text.psz_string = _("Discard");
 414     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 415     val.psz_string = "blend"; text.psz_string = _("Blend");
 416     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 417     val.psz_string = "mean"; text.psz_string = _("Mean");
 418     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 419     val.psz_string = "bob"; text.psz_string = _("Bob");
 420     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 421     val.psz_string = "linear"; text.psz_string = _("Linear");
 422     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 423     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 424     {
 425         var_Set( p_vout, "deinterlace", val );
 426         if( val.psz_string ) free( val.psz_string );
 427     }
 428     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 429
 430
 431     var_Create( p_vout, "filter", VLC_VAR_STRING );
 432     text.psz_string = _("Filters");
 433     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 434     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 435     if( val.psz_string )
 436     {
 437         var_Set( p_vout, "filter", val );
 438         free( val.psz_string );
 439     }
 440     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 441
 442     /* Calculate delay created by internal caching */
 443     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 444                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 445     if( p_input_thread )
 446     {
 447         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 448         vlc_object_release( p_input_thread );
 449     }
 450     else
 451     {
 452         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 453     }
 454
 455     if( vlc_thread_create( p_vout, "video output", RunThread,
 456                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 457     {
 458         msg_Err( p_vout, "out of memory" );
 459         module_Unneed( p_vout, p_vout->p_module );
 460         vlc_object_detach( p_vout );
 461         vlc_object_destroy( p_vout );
 462         return NULL;
 463     }
 464
 465     if( p_vout->b_error )
 466     {
 467         msg_Err( p_vout, "video output creation failed" );
 468
 469         /* Make sure the thread is destroyed */
 470         p_vout->b_die = VLC_TRUE;
 471
 472         vlc_thread_join( p_vout );
 473
 474         vlc_object_detach( p_vout );
 475         vlc_object_destroy( p_vout );
 476         return NULL;
 477     }
 478
 479     return p_vout;
 480 }
 481
 482 /*****************************************************************************
 483  * vout_Destroy: destroys a previously created video output
 484  *****************************************************************************
 485  * Destroy a terminated thread.
 486  * The function will request a destruction of the specified thread. If pi_error
 487  * is NULL, it will return once the thread is destroyed. Else, it will be
 488  * update using one of the THREAD_* constants.
 489  *****************************************************************************/
 490 void vout_Destroy( vout_thread_t *p_vout )
 491 {
 492     vlc_object_t *p_playlist;
 493
 494     /* Request thread destruction */
 495     p_vout->b_die = VLC_TRUE;
 496     vlc_thread_join( p_vout );
 497
 498     var_Destroy( p_vout, "intf-change" );
 499
 500     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 501                                   FIND_ANYWHERE );
 502
 503     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 504
 505     /* Free structure */
 506     vlc_object_destroy( p_vout );
 507
 508     /* If it was the last vout, tell the interface to show up */
 509     if( p_playlist != NULL )
 510     {
 511         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 512                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 513         if( p_another_vout == NULL )
 514         {
 515             vlc_value_t val;
 516             val.b_bool = VLC_TRUE;
 517             var_Set( p_playlist, "intf-show", val );
 518         }
 519         else
 520         {
 521             vlc_object_release( p_another_vout );
 522         }
 523         vlc_object_release( p_playlist );
 524     }
 525 }
 526
 527 /*****************************************************************************
 528  * InitThread: initialize video output thread
 529  *****************************************************************************
 530  * This function is called from RunThread and performs the second step of the
 531  * initialization. It returns 0 on success. Note that the thread's flag are not
 532  * modified inside this function.
 533  *****************************************************************************/
 534 static int InitThread( vout_thread_t *p_vout )
 535 {
 536     int i;
 537     unsigned int i_aspect_x, i_aspect_y;
 538
 539     vlc_mutex_lock( &p_vout->change_lock );
 540
 541 #ifdef STATS
 542     p_vout->c_loops = 0;
 543 #endif
 544
 545     /* Initialize output method, it allocates direct buffers for us */
 546     if( p_vout->pf_init( p_vout ) )
 547     {
 548         vlc_mutex_unlock( &p_vout->change_lock );
 549         return VLC_EGENERIC;
 550     }
 551
 552     if( !I_OUTPUTPICTURES )
 553     {
 554         msg_Err( p_vout, "plugin was unable to allocate at least "
 555                          "one direct buffer" );
 556         p_vout->pf_end( p_vout );
 557         vlc_mutex_unlock( &p_vout->change_lock );
 558         return VLC_EGENERIC;
 559     }
 560
 561     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 562     {
 563         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 564                          "our internal buffers must have overflown." );
 565         p_vout->pf_end( p_vout );
 566         vlc_mutex_unlock( &p_vout->change_lock );
 567         return VLC_EGENERIC;
 568     }
 569
 570     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 571
 572 #if 0
 573     if( !p_vout->psz_filter_chain )
 574     {
 575         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 576
 577         if( psz_aspect )
 578         {
 579             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 580                                                       * atof( psz_aspect )
 581                                                       / p_vout->output.i_height;
 582             free( psz_aspect );
 583
 584             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 585             {
 586                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 587
 588                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 589                          i_aspect_x, i_aspect_y );
 590                 p_vout->output.i_aspect = i_new_aspect;
 591             }
 592         }
 593     }
 594 #endif
 595
 596     vout_AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 597     msg_Dbg( p_vout,
 598              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 599              p_vout->render.i_width, p_vout->render.i_height,
 600              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 601              i_aspect_x, i_aspect_y );
 602
 603     vout_AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 604     msg_Dbg( p_vout,
 605              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 606              p_vout->output.i_width, p_vout->output.i_height,
 607              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 608              i_aspect_x, i_aspect_y );
 609
 610     /* Calculate shifts from system-updated masks */
 611     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 612                  p_vout->output.i_rmask );
 613     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 614                  p_vout->output.i_gmask );
 615     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 616                  p_vout->output.i_bmask );
 617
 618     /* Check whether we managed to create direct buffers similar to
 619      * the render buffers, ie same size and chroma */
 620     if( ( p_vout->output.i_width == p_vout->render.i_width )
 621      && ( p_vout->output.i_height == p_vout->render.i_height )
 622      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 623     {
 624         /* Cool ! We have direct buffers, we can ask the decoder to
 625          * directly decode into them ! Map the first render buffers to
 626          * the first direct buffers, but keep the first direct buffer
 627          * for memcpy operations */
 628         p_vout->b_direct = 1;
 629
 630         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 631         {
 632             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 633                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 634                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 635             {
 636                 /* We have enough direct buffers so there's no need to
 637                  * try to use system memory buffers. */
 638                 break;
 639             }
 640             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 641             I_RENDERPICTURES++;
 642         }
 643
 644         msg_Dbg( p_vout, "direct render, mapping "
 645                  "render pictures 0-%i to system pictures 1-%i",
 646                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 647     }
 648     else
 649     {
 650         /* Rats... Something is wrong here, we could not find an output
 651          * plugin able to directly render what we decode. See if we can
 652          * find a chroma plugin to do the conversion */
 653         p_vout->b_direct = 0;
 654
 655         /* Choose the best module */
 656         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 657
 658         if( p_vout->chroma.p_module == NULL )
 659         {
 660             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 661                      (char*)&p_vout->render.i_chroma,
 662                      (char*)&p_vout->output.i_chroma );
 663             p_vout->pf_end( p_vout );
 664             vlc_mutex_unlock( &p_vout->change_lock );
 665             return VLC_EGENERIC;
 666         }
 667
 668         msg_Dbg( p_vout, "indirect render, mapping "
 669                  "render pictures 0-%i to system pictures %i-%i",
 670                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 671                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 672
 673         /* Append render buffers after the direct buffers */
 674         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 675         {
 676             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 677             I_RENDERPICTURES++;
 678
 679             /* Check if we have enough render pictures */
 680             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 681                 break;
 682         }
 683     }
 684
 685     /* Link pictures back to their heap */
 686     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 687     {
 688         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 689     }
 690
 691     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 692     {
 693         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 694     }
 695
 696 /* XXX XXX mark thread ready */
 697     return VLC_SUCCESS;
 698 }
 699
 700 /*****************************************************************************
 701  * RunThread: video output thread
 702  *****************************************************************************
 703  * Video output thread. This function does only returns when the thread is
 704  * terminated. It handles the pictures arriving in the video heap and the
 705  * display device events.
 706  *****************************************************************************/
 707 static void RunThread( vout_thread_t *p_vout)
 708 {
 709     int             i_index;                                /* index in heap */
 710     int             i_idle_loops = 0;  /* loops without displaying a picture */
 711     mtime_t         current_date;                            /* current date */
 712     mtime_t         display_date;                            /* display date */
 713
 714     picture_t *     p_picture;                            /* picture pointer */
 715     picture_t *     p_last_picture = NULL;                   /* last picture */
 716     picture_t *     p_directbuffer;              /* direct buffer to display */
 717
 718     subpicture_t *  p_subpic;                          /* subpicture pointer */
 719
 720     /*
 721      * Initialize thread
 722      */
 723     p_vout->b_error = InitThread( p_vout );
 724
 725     /* signal the creation of the vout */
 726     vlc_thread_ready( p_vout );
 727
 728     if( p_vout->b_error )
 729     {
 730         /* Destroy thread structures allocated by Create and InitThread */
 731         DestroyThread( p_vout );
 732         return;
 733     }
 734
 735     /*
 736      * Main loop - it is not executed if an error occured during
 737      * initialization
 738      */
 739     while( (!p_vout->b_die) && (!p_vout->b_error) )
 740     {
 741         /* Initialize loop variables */
 742         p_picture = NULL;
 743         display_date = 0;
 744         current_date = mdate();
 745
 746 #if 0
 747         p_vout->c_loops++;
 748         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 749         {
 750             msg_Dbg( p_vout, "picture heap: %d/%d",
 751                      I_RENDERPICTURES, p_vout->i_heap_size );
 752         }
 753 #endif
 754
 755         /*
 756          * Find the picture to display (the one with the earliest date).
 757          * This operation does not need lock, since only READY_PICTUREs
 758          * are handled. */
 759         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 760         {
 761             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 762                 && ( (p_picture == NULL) ||
 763                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 764             {
 765                 p_picture = PP_RENDERPICTURE[i_index];
 766                 display_date = p_picture->date;
 767             }
 768         }
 769
 770         if( p_picture )
 771         {
 772             /* If we met the last picture, parse again to see whether there is
 773              * a more appropriate one. */
 774             if( p_picture == p_last_picture )
 775             {
 776                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 777                 {
 778                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 779                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 780                         && ((p_picture == p_last_picture) ||
 781                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 782                     {
 783                         p_picture = PP_RENDERPICTURE[i_index];
 784                         display_date = p_picture->date;
 785                     }
 786                 }
 787             }
 788
 789             /* If we found better than the last picture, destroy it */
 790             if( p_last_picture && p_picture != p_last_picture )
 791             {
 792                 vlc_mutex_lock( &p_vout->picture_lock );
 793                 if( p_last_picture->i_refcount )
 794                 {
 795                     p_last_picture->i_status = DISPLAYED_PICTURE;
 796                 }
 797                 else
 798                 {
 799                     p_last_picture->i_status = DESTROYED_PICTURE;
 800                     p_vout->i_heap_size--;
 801                 }
 802                 vlc_mutex_unlock( &p_vout->picture_lock );
 803                 p_last_picture = NULL;
 804             }
 805
 806             /* Compute FPS rate */
 807             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 808                 = display_date;
 809
 810             if( !p_picture->b_force &&
 811                 p_picture != p_last_picture &&
 812                 display_date < current_date + p_vout->render_time )
 813             {
 814                 /* Picture is late: it will be destroyed and the thread
 815                  * will directly choose the next picture */
 816                 vlc_mutex_lock( &p_vout->picture_lock );
 817                 if( p_picture->i_refcount )
 818                 {
 819                     /* Pretend we displayed the picture, but don't destroy
 820                      * it since the decoder might still need it. */
 821                     p_picture->i_status = DISPLAYED_PICTURE;
 822                 }
 823                 else
 824                 {
 825                     /* Destroy the picture without displaying it */
 826                     p_picture->i_status = DESTROYED_PICTURE;
 827                     p_vout->i_heap_size--;
 828                 }
 829                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 830                                   current_date - display_date );
 831                 vlc_mutex_unlock( &p_vout->picture_lock );
 832
 833                 continue;
 834             }
 835
 836             if( display_date >
 837                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 838             {
 839                 /* Picture is waaay too early: it will be destroyed */
 840                 vlc_mutex_lock( &p_vout->picture_lock );
 841                 if( p_picture->i_refcount )
 842                 {
 843                     /* Pretend we displayed the picture, but don't destroy
 844                      * it since the decoder might still need it. */
 845                     p_picture->i_status = DISPLAYED_PICTURE;
 846                 }
 847                 else
 848                 {
 849                     /* Destroy the picture without displaying it */
 850                     p_picture->i_status = DESTROYED_PICTURE;
 851                     p_vout->i_heap_size--;
 852                 }
 853                 msg_Warn( p_vout, "vout warning: early picture skipped "
 854                           "("I64Fd")", display_date - current_date
 855                           - p_vout->i_pts_delay );
 856                 vlc_mutex_unlock( &p_vout->picture_lock );
 857
 858                 continue;
 859             }
 860
 861             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 862             {
 863                 /* A picture is ready to be rendered, but its rendering date
 864                  * is far from the current one so the thread will perform an
 865                  * empty loop as if no picture were found. The picture state
 866                  * is unchanged */
 867                 p_picture    = NULL;
 868                 display_date = 0;
 869             }
 870             else if( p_picture == p_last_picture )
 871             {
 872                 /* We are asked to repeat the previous picture, but we first
 873                  * wait for a couple of idle loops */
 874                 if( i_idle_loops < 4 )
 875                 {
 876                     p_picture    = NULL;
 877                     display_date = 0;
 878                 }
 879                 else
 880                 {
 881                     /* We set the display date to something high, otherwise
 882                      * we'll have lots of problems with late pictures */
 883                     display_date = current_date + p_vout->render_time;
 884                 }
 885             }
 886         }
 887
 888         if( p_picture == NULL )
 889         {
 890             i_idle_loops++;
 891         }
 892
 893         /*
 894          * Check for subpictures to display
 895          */
 896         p_subpic = vout_SortSubPictures( p_vout, display_date );
 897
 898         /*
 899          * Perform rendering
 900          */
 901         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 902
 903         /*
 904          * Call the plugin-specific rendering method if there is one
 905          */
 906         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 907         {
 908             /* Render the direct buffer returned by vout_RenderPicture */
 909             p_vout->pf_render( p_vout, p_directbuffer );
 910         }
 911
 912         /*
 913          * Sleep, wake up
 914          */
 915         if( display_date != 0 && p_directbuffer != NULL )
 916         {
 917             mtime_t current_render_time = mdate() - current_date;
 918             /* if render time is very large we don't include it in the mean */
 919             if( current_render_time < p_vout->render_time +
 920                 VOUT_DISPLAY_DELAY )
 921             {
 922                 /* Store render time using a sliding mean weighting to
 923                  * current value in a 3 to 1 ratio*/
 924                 p_vout->render_time *= 3;
 925                 p_vout->render_time += current_render_time;
 926                 p_vout->render_time >>= 2;
 927             }
 928         }
 929
 930         /* Give back change lock */
 931         vlc_mutex_unlock( &p_vout->change_lock );
 932
 933         /* Sleep a while or until a given date */
 934         if( display_date != 0 )
 935         {
 936             /* If there are filters in the chain, better give them the picture
 937              * in advance */
 938             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 939             {
 940                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 941             }
 942         }
 943         else
 944         {
 945             msleep( VOUT_IDLE_SLEEP );
 946         }
 947
 948         /* On awakening, take back lock and send immediately picture
 949          * to display. */
 950         vlc_mutex_lock( &p_vout->change_lock );
 951
 952         /*
 953          * Display the previously rendered picture
 954          */
 955         if( p_picture != NULL && p_directbuffer != NULL )
 956         {
 957             /* Display the direct buffer returned by vout_RenderPicture */
 958             if( p_vout->pf_display )
 959             {
 960                 p_vout->pf_display( p_vout, p_directbuffer );
 961             }
 962
 963             /* Reinitialize idle loop count */
 964             i_idle_loops = 0;
 965
 966             /* Tell the vout this was the last picture and that it does not
 967              * need to be forced anymore. */
 968             p_last_picture = p_picture;
 969             p_last_picture->b_force = 0;
 970         }
 971
 972         /*
 973          * Check events and manage thread
 974          */
 975         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 976         {
 977             /* A fatal error occured, and the thread must terminate
 978              * immediately, without displaying anything - setting b_error to 1
 979              * causes the immediate end of the main while() loop. */
 980             p_vout->b_error = 1;
 981         }
 982
 983         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 984         {
 985             /* this must only happen when the vout plugin is incapable of
 986              * rescaling the picture itself. In this case we need to destroy
 987              * the current picture buffers and recreate new ones with the right
 988              * dimensions */
 989             int i;
 990
 991             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 992
 993             p_vout->pf_end( p_vout );
 994             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 995                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 996
 997             I_OUTPUTPICTURES = 0;
 998             if( p_vout->pf_init( p_vout ) )
 999             {
1000                 msg_Err( p_vout, "cannot resize display" );
1001                 /* FIXME: pf_end will be called again in EndThread() */
1002                 p_vout->b_error = 1;
1003             }
1004
1005             /* Need to reinitialise the chroma plugin */
1006             if( p_vout->chroma.p_module )
1007             {
1008                 if( p_vout->chroma.p_module->pf_deactivate )
1009                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1010                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1011             }
1012         }
1013
1014         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1015         {
1016             /* This happens when the picture buffers need to be recreated.
1017              * This is useful on multimonitor displays for instance.
1018              *
1019              * Warning: This only works when the vout creates only 1 picture
1020              * buffer!! */
1021             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1022
1023             if( !p_vout->b_direct )
1024             {
1025                 module_Unneed( p_vout, p_vout->chroma.p_module );
1026             }
1027
1028             vlc_mutex_lock( &p_vout->picture_lock );
1029
1030             p_vout->pf_end( p_vout );
1031
1032             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1033
1034             p_vout->b_error = InitThread( p_vout );
1035
1036             vlc_mutex_unlock( &p_vout->picture_lock );
1037         }
1038     }
1039
1040     /*
1041      * Error loop - wait until the thread destruction is requested
1042      */
1043     if( p_vout->b_error )
1044     {
1045         ErrorThread( p_vout );
1046     }
1047
1048     /* End of thread */
1049     EndThread( p_vout );
1050
1051     /* Destroy thread structures allocated by CreateThread */
1052     DestroyThread( p_vout );
1053 }
1054
1055 /*****************************************************************************
1056  * ErrorThread: RunThread() error loop
1057  *****************************************************************************
1058  * This function is called when an error occured during thread main's loop. The
1059  * thread can still receive feed, but must be ready to terminate as soon as
1060  * possible.
1061  *****************************************************************************/
1062 static void ErrorThread( vout_thread_t *p_vout )
1063 {
1064     /* Wait until a `die' order */
1065     while( !p_vout->b_die )
1066     {
1067         /* Sleep a while */
1068         msleep( VOUT_IDLE_SLEEP );
1069     }
1070 }
1071
1072 /*****************************************************************************
1073  * EndThread: thread destruction
1074  *****************************************************************************
1075  * This function is called when the thread ends after a sucessful
1076  * initialization. It frees all resources allocated by InitThread.
1077  *****************************************************************************/
1078 static void EndThread( vout_thread_t *p_vout )
1079 {
1080     int     i_index;                                        /* index in heap */
1081
1082 #ifdef STATS
1083     {
1084         struct tms cpu_usage;
1085         times( &cpu_usage );
1086
1087         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1088                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1089     }
1090 #endif
1091
1092     if( !p_vout->b_direct )
1093     {
1094         module_Unneed( p_vout, p_vout->chroma.p_module );
1095     }
1096
1097     /* Destroy all remaining pictures */
1098     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1099     {
1100         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1101         {
1102             free( p_vout->p_picture[i_index].p_data_orig );
1103         }
1104     }
1105
1106     /* Destroy subpicture unit */
1107     vout_DestroySPU( p_vout );
1108
1109     /* Destroy translation tables */
1110     p_vout->pf_end( p_vout );
1111
1112     /* Release the change lock */
1113     vlc_mutex_unlock( &p_vout->change_lock );
1114 }
1115
1116 /*****************************************************************************
1117  * DestroyThread: thread destruction
1118  *****************************************************************************
1119  * This function is called when the thread ends. It frees all ressources
1120  * allocated by CreateThread. Status is available at this stage.
1121  *****************************************************************************/
1122 static void DestroyThread( vout_thread_t *p_vout )
1123 {
1124     /* Destroy the locks */
1125     vlc_mutex_destroy( &p_vout->picture_lock );
1126     vlc_mutex_destroy( &p_vout->subpicture_lock );
1127     vlc_mutex_destroy( &p_vout->change_lock );
1128
1129     /* Release the module */
1130     if( p_vout && p_vout->p_module )
1131     {
1132         module_Unneed( p_vout, p_vout->p_module );
1133     }
1134 }
1135
1136 /* following functions are local */
1137
1138 static int ReduceHeight( int i_ratio )
1139 {
1140     int i_dummy = VOUT_ASPECT_FACTOR;
1141     int i_pgcd  = 1;
1142
1143     if( !i_ratio )
1144     {
1145         return i_pgcd;
1146     }
1147
1148     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1149     while( !(i_ratio & 1) && !(i_dummy & 1) )
1150     {
1151         i_ratio >>= 1;
1152         i_dummy >>= 1;
1153         i_pgcd  <<= 1;
1154     }
1155
1156     while( !(i_ratio % 3) && !(i_dummy % 3) )
1157     {
1158         i_ratio /= 3;
1159         i_dummy /= 3;
1160         i_pgcd  *= 3;
1161     }
1162
1163     while( !(i_ratio % 5) && !(i_dummy % 5) )
1164     {
1165         i_ratio /= 5;
1166         i_dummy /= 5;
1167         i_pgcd  *= 5;
1168     }
1169
1170     return i_pgcd;
1171 }
1172
1173 /*****************************************************************************
1174  * BinaryLog: computes the base 2 log of a binary value
1175  *****************************************************************************
1176  * This functions is used by MaskToShift, to get a bit index from a binary
1177  * value.
1178  *****************************************************************************/
1179 static int BinaryLog( uint32_t i )
1180 {
1181     int i_log = 0;
1182
1183     if( i == 0 ) return -31337;
1184
1185     if( i & 0xffff0000 ) i_log += 16;
1186     if( i & 0xff00ff00 ) i_log += 8;
1187     if( i & 0xf0f0f0f0 ) i_log += 4;
1188     if( i & 0xcccccccc ) i_log += 2;
1189     if( i & 0xaaaaaaaa ) i_log += 1;
1190
1191     return i_log;
1192 }
1193
1194 /*****************************************************************************
1195  * MaskToShift: transform a color mask into right and left shifts
1196  *****************************************************************************
1197  * This function is used for obtaining color shifts from masks.
1198  *****************************************************************************/
1199 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1200 {
1201     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1202
1203     if( !i_mask )
1204     {
1205         *pi_left = *pi_right = 0;
1206         return;
1207     }
1208
1209     /* Get bits */
1210     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1211     i_high = i_mask + i_low;                       /* higher bit of the mask */
1212
1213     /* Transform bits into an index */
1214     i_low =  BinaryLog (i_low);
1215     i_high = BinaryLog (i_high);
1216
1217     /* Update pointers and return */
1218     *pi_left =   i_low;
1219     *pi_right = (8 - i_high + i_low);
1220 }
1221
1222 /*****************************************************************************
1223  * InitWindowSize: find the initial dimensions the video window should have.
1224  *****************************************************************************
1225  * This function will check the "width", "height" and "zoom" config options and
1226  * will calculate the size that the video window should have.
1227  *****************************************************************************/
1228 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1229                             int *pi_height )
1230 {
1231     vlc_value_t val;
1232     int i_width, i_height;
1233     uint64_t ll_zoom;
1234
1235 #define FP_FACTOR 1000                             /* our fixed point factor */
1236
1237     var_Get( p_vout, "align", &val );
1238     p_vout->i_alignment = val.i_int;
1239
1240     var_Get( p_vout, "width", &val );
1241     i_width = val.i_int;
1242     var_Get( p_vout, "height", &val );
1243     i_height = val.i_int;
1244     var_Get( p_vout, "zoom", &val );
1245     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1246
1247     if( i_width > 0 && i_height > 0)
1248     {
1249         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1250         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1251         return;
1252     }
1253     else if( i_width > 0 )
1254     {
1255         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1256         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1257                             p_vout->render.i_aspect / FP_FACTOR );
1258         return;
1259     }
1260     else if( i_height > 0 )
1261     {
1262         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1263         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1264                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1265         return;
1266     }
1267
1268     if( p_vout->render.i_height * p_vout->render.i_aspect
1269         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1270     {
1271         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1272           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1273         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1274     }
1275     else
1276     {
1277         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1278         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1279           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1280     }
1281
1282 #undef FP_FACTOR
1283 }
1284
1285 /*****************************************************************************
1286  * vout_VarCallback: generic callback for intf variables
1287  *****************************************************************************/
1288 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1289                       vlc_value_t old_value, vlc_value_t new_value,
1290                       void * unused )
1291 {
1292     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1293     vlc_value_t val;
1294     val.b_bool = VLC_TRUE;
1295     var_Set( p_vout, "intf-change", val );
1296     return VLC_SUCCESS;
1297 }
1298
1299 /*****************************************************************************
1300  * object variables callbacks: a bunch of object variables are used by the
1301  * interfaces to interact with the vout.
1302  *****************************************************************************/
1303 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1304                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1305 {
1306     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1307     input_thread_t *p_input;
1308     vlc_value_t val;
1309
1310     char *psz_mode = newval.psz_string;
1311     char *psz_filter;
1312     unsigned int  i;
1313
1314     psz_filter = config_GetPsz( p_vout, "filter" );
1315
1316     if( !psz_mode || !*psz_mode )
1317     {
1318         config_PutPsz( p_vout, "filter", "" );
1319     }
1320     else
1321     {
1322         if( !psz_filter || !*psz_filter )
1323         {
1324             config_PutPsz( p_vout, "filter", "deinterlace" );
1325         }
1326         else
1327         {
1328             if( strstr( psz_filter, "deinterlace" ) == NULL )
1329             {
1330                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1331                 strcat( psz_filter, ",deinterlace" );
1332             }
1333             config_PutPsz( p_vout, "filter", psz_filter );
1334         }
1335     }
1336
1337     if( psz_filter ) free( psz_filter );
1338
1339
1340     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1341                                                  FIND_PARENT );
1342     if( !p_input ) return VLC_EGENERIC;
1343
1344     if( psz_mode && *psz_mode )
1345     {
1346         val.psz_string = psz_mode;
1347         var_Set( p_vout, "deinterlace-mode", val );
1348         /* Modify input as well because the vout might have to be restarted */
1349         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1350         var_Set( p_input, "deinterlace-mode", val );
1351     }
1352
1353     /* FIXME FIXME input2 --fenrir */
1354 #if 0
1355     /* now restart all video streams */
1356     vlc_mutex_lock( &p_input->stream.stream_lock );
1357
1358     p_vout->b_filter_change = VLC_TRUE;
1359
1360 #define ES p_input->stream.pp_es[i]
1361
1362     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1363     {
1364         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1365         {
1366             input_UnselectES( p_input, ES );
1367             input_SelectES( p_input, ES );
1368         }
1369 #undef ES
1370     }
1371     vlc_mutex_unlock( &p_input->stream.stream_lock );
1372
1373     vlc_object_release( p_input );
1374 #endif
1375
1376     val.b_bool = VLC_TRUE;
1377     var_Set( p_vout, "intf-change", val );
1378     return VLC_SUCCESS;
1379 }
1380
1381 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1382                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1383 {
1384     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1385     input_thread_t *p_input;
1386     vlc_value_t val;
1387     unsigned int i;
1388
1389     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1390                                                  FIND_PARENT );
1391
1392     if (!p_input)
1393     {
1394         msg_Err( p_vout, "Input not found" );
1395         return( VLC_EGENERIC );
1396     }
1397
1398     /* FIXME FIXME input2 --fenrir */
1399 #if 0
1400     /* Restart the video stream */
1401     vlc_mutex_lock( &p_input->stream.stream_lock );
1402
1403     p_vout->b_filter_change = VLC_TRUE;
1404
1405 #define ES p_input->stream.pp_es[i]
1406
1407     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1408     {
1409         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1410         {
1411             input_UnselectES( p_input, ES );
1412             input_SelectES( p_input, ES );
1413         }
1414 #undef ES
1415     }
1416     vlc_mutex_unlock( &p_input->stream.stream_lock );
1417
1418     vlc_object_release( p_input );
1419 #endif
1420
1421     val.b_bool = VLC_TRUE;
1422     var_Set( p_vout, "intf-change", val );
1423     return VLC_SUCCESS;
1424 }