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