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