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) 2000-2001 VideoLAN
   8  * $Id: video_output.c,v 1.239 2003/10/26 13:10:05 sigmunau Exp $
   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 FullscreenCallback( vlc_object_t *, char const *,
  62                                vlc_value_t, vlc_value_t, void * );
  63 static int DeinterlaceCallback( vlc_object_t *, char const *,
  64                                 vlc_value_t, vlc_value_t, void * );
  65 static int FilterCallback( vlc_object_t *, char const *,
  66                            vlc_value_t, vlc_value_t, void * );
  67
  68 /*****************************************************************************
  69  * vout_Request: find a video output thread, create one, or destroy one.
  70  *****************************************************************************
  71  * This function looks for a video output thread matching the current
  72  * properties. If not found, it spawns a new one.
  73  *****************************************************************************/
  74 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  75                                  unsigned int i_width, unsigned int i_height,
  76                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  77 {
  78     if( !i_width || !i_height || !i_chroma )
  79     {
  80         /* Reattach video output to input before bailing out */
  81         if( p_vout )
  82         {
  83             vlc_object_t *p_playlist;
  84
  85             p_playlist = vlc_object_find( p_this,
  86                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
  87
  88             if( p_playlist )
  89             {
  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             vlc_object_attach( p_vout, p_this );
 185             vlc_object_release( p_vout );
 186         }
 187     }
 188
 189     if( !p_vout )
 190     {
 191         msg_Dbg( p_this, "no usable vout present, spawning one" );
 192
 193         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 194     }
 195
 196     return p_vout;
 197 }
 198
 199 /*****************************************************************************
 200  * vout_Create: creates a new video output thread
 201  *****************************************************************************
 202  * This function creates a new video output thread, and returns a pointer
 203  * to its description. On error, it returns NULL.
 204  *****************************************************************************/
 205 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 206                                unsigned int i_width, unsigned int i_height,
 207                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 208 {
 209     vout_thread_t  * p_vout;                            /* thread descriptor */
 210     input_thread_t * p_input_thread;
 211     int              i_index;                               /* loop variable */
 212     char           * psz_plugin;
 213     vlc_value_t      val, text;
 214
 215     /* Allocate descriptor */
 216     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 217     if( p_vout == NULL )
 218     {
 219         msg_Err( p_parent, "out of memory" );
 220         return NULL;
 221     }
 222
 223     /* Initialize pictures and subpictures - translation tables and functions
 224      * will be initialized later in InitThread */
 225     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
 226     {
 227         p_vout->p_picture[i_index].pf_lock = NULL;
 228         p_vout->p_picture[i_index].pf_unlock = NULL;
 229         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 230         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 231     }
 232
 233     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 234     {
 235         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 236         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 237     }
 238
 239     /* No images in the heap */
 240     p_vout->i_heap_size = 0;
 241
 242     /* Initialize the rendering heap */
 243     I_RENDERPICTURES = 0;
 244     p_vout->render.i_width    = i_width;
 245     p_vout->render.i_height   = i_height;
 246     p_vout->render.i_chroma   = i_chroma;
 247     p_vout->render.i_aspect   = i_aspect;
 248
 249     p_vout->render.i_rmask    = 0;
 250     p_vout->render.i_gmask    = 0;
 251     p_vout->render.i_bmask    = 0;
 252
 253     p_vout->render.i_last_used_pic = -1;
 254     p_vout->render.b_allow_modify_pics = 1;
 255
 256     /* Zero the output heap */
 257     I_OUTPUTPICTURES = 0;
 258     p_vout->output.i_width    = 0;
 259     p_vout->output.i_height   = 0;
 260     p_vout->output.i_chroma   = 0;
 261     p_vout->output.i_aspect   = 0;
 262
 263     p_vout->output.i_rmask    = 0;
 264     p_vout->output.i_gmask    = 0;
 265     p_vout->output.i_bmask    = 0;
 266
 267     /* Initialize misc stuff */
 268     p_vout->i_changes    = 0;
 269     p_vout->f_gamma      = 0;
 270     p_vout->b_grayscale  = 0;
 271     p_vout->b_info       = 0;
 272     p_vout->b_interface  = 0;
 273     p_vout->b_scale      = 1;
 274     p_vout->b_fullscreen = 0;
 275     p_vout->i_alignment  = 0;
 276     p_vout->render_time  = 10;
 277     p_vout->c_fps_samples = 0;
 278     p_vout->b_filter_change = 0;
 279
 280     /* Mouse coordinates */
 281     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 282     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 283     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 284     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 285     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 286
 287     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 288     val.b_bool = VLC_TRUE;
 289     var_Set( p_vout, "intf-change", val );
 290
 291     /* Initialize locks */
 292     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 293     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 294     vlc_mutex_init( p_vout, &p_vout->change_lock );
 295
 296     /* Attach the new object now so we can use var inheritance below */
 297     vlc_object_attach( p_vout, p_parent );
 298
 299     /* Create a few object variables we'll need later on */
 300     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 301     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 302     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 303     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 304     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 305
 306     p_vout->b_override_aspect = VLC_FALSE;
 307
 308     /* If the parent is not a VOUT object, that means we are at the start of
 309      * the video output pipe */
 310     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 311     {
 312         var_Get( p_vout, "aspect-ratio", &val );
 313
 314         /* Check whether the user tried to override aspect ratio */
 315         if( val.psz_string )
 316         {
 317             unsigned int i_new_aspect = i_aspect;
 318             char *psz_parser = strchr( val.psz_string, ':' );
 319
 320             if( psz_parser )
 321             {
 322                 *psz_parser++ = '\0';
 323                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 324                                                       / atoi( psz_parser );
 325             }
 326             else
 327             {
 328                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 329                                        * atof( val.psz_string )
 330                                        / i_height;
 331             }
 332
 333             free( val.psz_string );
 334
 335             if( i_new_aspect && i_new_aspect != i_aspect )
 336             {
 337                 int i_pgcd = ReduceHeight( i_new_aspect );
 338
 339                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 340                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 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 &&
 391                                *p_vout->psz_filter_chain ) ?
 392                            "video filter" : "video output",
 393                            psz_plugin );
 394
 395     if( psz_plugin ) free( psz_plugin );
 396     if( p_vout->p_module == NULL )
 397     {
 398         msg_Err( p_vout, "no suitable vout module" );
 399         vlc_object_destroy( p_vout );
 400         return NULL;
 401     }
 402
 403     p_vout->p_text_renderer_module = module_Need( p_vout, "text renderer",
 404                                                   NULL );
 405     if( p_vout->p_text_renderer_module == NULL )
 406     {
 407         msg_Warn( p_vout, "no suitable text renderer module" );
 408         p_vout->pf_add_string = NULL;
 409     }
 410
 411     /* Create a few object variables for interface interaction */
 412     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
 413     text.psz_string = _("Fullscreen");
 414     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 415     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
 416     if( val.b_bool )
 417     {
 418         /* user requested fullscreen */
 419         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 420     }
 421     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 422
 423     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 424     text.psz_string = _("Deinterlace");
 425     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 426     val.psz_string = ""; text.psz_string = _("Disable");
 427     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 428     val.psz_string = "discard"; text.psz_string = _("Discard");
 429     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 430     val.psz_string = "blend"; text.psz_string = _("Blend");
 431     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 432     val.psz_string = "mean"; text.psz_string = _("Mean");
 433     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 434     val.psz_string = "bob"; text.psz_string = _("Bob");
 435     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 436     val.psz_string = "linear"; text.psz_string = _("Linear");
 437     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 438     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 439     {
 440         var_Set( p_vout, "deinterlace", val );
 441     }
 442     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 443
 444
 445     var_Create( p_vout, "filter", VLC_VAR_STRING );
 446     text.psz_string = _("Filters");
 447     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 448     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 449     if( var_Get( p_vout, "filter", &val ) == VLC_SUCCESS )
 450     {
 451         var_Set( p_vout, "filter", val );
 452     }
 453     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 454
 455     /* Calculate delay created by internal caching */
 456     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 457                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 458     if( p_input_thread )
 459     {
 460         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 461         vlc_object_release( p_input_thread );
 462     }
 463     else
 464     {
 465         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 466     }
 467
 468     if( vlc_thread_create( p_vout, "video output", RunThread,
 469                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 470     {
 471         msg_Err( p_vout, "out of memory" );
 472         module_Unneed( p_vout, p_vout->p_module );
 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     /* Free structure */
 502     vlc_object_destroy( p_vout );
 503
 504     /* If it was the last vout, tell the interface to show up */
 505     if( p_playlist != NULL )
 506     {
 507         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 508                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 509         if( p_another_vout == NULL )
 510         {
 511             vlc_value_t val;
 512             val.b_bool = VLC_TRUE;
 513             var_Set( p_playlist, "intf-show", val );
 514         }
 515         else
 516         {
 517             vlc_object_release( p_another_vout );
 518         }
 519         vlc_object_release( p_playlist );
 520     }
 521 }
 522
 523 /*****************************************************************************
 524  * InitThread: initialize video output thread
 525  *****************************************************************************
 526  * This function is called from RunThread and performs the second step of the
 527  * initialization. It returns 0 on success. Note that the thread's flag are not
 528  * modified inside this function.
 529  *****************************************************************************/
 530 static int InitThread( vout_thread_t *p_vout )
 531 {
 532     int i, i_pgcd;
 533
 534     vlc_mutex_lock( &p_vout->change_lock );
 535
 536 #ifdef STATS
 537     p_vout->c_loops = 0;
 538 #endif
 539
 540     /* Initialize output method, it allocates direct buffers for us */
 541     if( p_vout->pf_init( p_vout ) )
 542     {
 543         vlc_mutex_unlock( &p_vout->change_lock );
 544         return VLC_EGENERIC;
 545     }
 546
 547     if( !I_OUTPUTPICTURES )
 548     {
 549         msg_Err( p_vout, "plugin was unable to allocate at least "
 550                          "one direct buffer" );
 551         p_vout->pf_end( p_vout );
 552         vlc_mutex_unlock( &p_vout->change_lock );
 553         return VLC_EGENERIC;
 554     }
 555
 556     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 557     {
 558         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 559                          "our internal buffers must have overflown." );
 560         p_vout->pf_end( p_vout );
 561         vlc_mutex_unlock( &p_vout->change_lock );
 562         return VLC_EGENERIC;
 563     }
 564
 565     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 566
 567 #if 0
 568     if( !p_vout->psz_filter_chain )
 569     {
 570         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 571
 572         if( psz_aspect )
 573         {
 574             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 575                                                       * atof( psz_aspect )
 576                                                       / p_vout->output.i_height;
 577             free( psz_aspect );
 578
 579             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 580             {
 581                 int i_pgcd = ReduceHeight( i_new_aspect );
 582                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 583                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 584                 p_vout->output.i_aspect = i_new_aspect;
 585             }
 586         }
 587     }
 588 #endif
 589
 590     i_pgcd = ReduceHeight( p_vout->render.i_aspect );
 591     msg_Dbg( p_vout,
 592              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 593              p_vout->render.i_width, p_vout->render.i_height,
 594              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 595              p_vout->render.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 596
 597     i_pgcd = ReduceHeight( p_vout->output.i_aspect );
 598     msg_Dbg( p_vout,
 599              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 600              p_vout->output.i_width, p_vout->output.i_height,
 601              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 602              p_vout->output.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 603
 604     /* Calculate shifts from system-updated masks */
 605     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 606                  p_vout->output.i_rmask );
 607     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 608                  p_vout->output.i_gmask );
 609     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 610                  p_vout->output.i_bmask );
 611
 612     /* Check whether we managed to create direct buffers similar to
 613      * the render buffers, ie same size and chroma */
 614     if( ( p_vout->output.i_width == p_vout->render.i_width )
 615      && ( p_vout->output.i_height == p_vout->render.i_height )
 616      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 617     {
 618         /* Cool ! We have direct buffers, we can ask the decoder to
 619          * directly decode into them ! Map the first render buffers to
 620          * the first direct buffers, but keep the first direct buffer
 621          * for memcpy operations */
 622         p_vout->b_direct = 1;
 623
 624         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 625         {
 626             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 627                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 628                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 629             {
 630                 /* We have enough direct buffers so there's no need to
 631                  * try to use system memory buffers. */
 632                 break;
 633             }
 634             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 635             I_RENDERPICTURES++;
 636         }
 637
 638         msg_Dbg( p_vout, "direct render, mapping "
 639                  "render pictures 0-%i to system pictures 1-%i",
 640                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 641     }
 642     else
 643     {
 644         /* Rats... Something is wrong here, we could not find an output
 645          * plugin able to directly render what we decode. See if we can
 646          * find a chroma plugin to do the conversion */
 647         p_vout->b_direct = 0;
 648
 649         /* Choose the best module */
 650         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
 651
 652         if( p_vout->chroma.p_module == NULL )
 653         {
 654             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 655                      (char*)&p_vout->render.i_chroma,
 656                      (char*)&p_vout->output.i_chroma );
 657             p_vout->pf_end( p_vout );
 658             vlc_mutex_unlock( &p_vout->change_lock );
 659             return VLC_EGENERIC;
 660         }
 661
 662         msg_Dbg( p_vout, "indirect render, mapping "
 663                  "render pictures 0-%i to system pictures %i-%i",
 664                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 665                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 666
 667         /* Append render buffers after the direct buffers */
 668         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 669         {
 670             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 671             I_RENDERPICTURES++;
 672
 673             /* Check if we have enough render pictures */
 674             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 675                 break;
 676         }
 677     }
 678
 679     /* Link pictures back to their heap */
 680     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 681     {
 682         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 683     }
 684
 685     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 686     {
 687         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 688     }
 689
 690 /* XXX XXX mark thread ready */
 691     return VLC_SUCCESS;
 692 }
 693
 694 /*****************************************************************************
 695  * RunThread: video output thread
 696  *****************************************************************************
 697  * Video output thread. This function does only returns when the thread is
 698  * terminated. It handles the pictures arriving in the video heap and the
 699  * display device events.
 700  *****************************************************************************/
 701 static void RunThread( vout_thread_t *p_vout)
 702 {
 703     int             i_index;                                /* index in heap */
 704     int             i_idle_loops = 0;  /* loops without displaying a picture */
 705     mtime_t         current_date;                            /* current date */
 706     mtime_t         display_date;                            /* display date */
 707
 708     picture_t *     p_picture;                            /* picture pointer */
 709     picture_t *     p_last_picture = NULL;                   /* last picture */
 710     picture_t *     p_directbuffer;              /* direct buffer to display */
 711
 712     subpicture_t *  p_subpic;                          /* subpicture pointer */
 713
 714     /*
 715      * Initialize thread
 716      */
 717     p_vout->b_error = InitThread( p_vout );
 718
 719     /* signal the creation of the vout */
 720     vlc_thread_ready( p_vout );
 721
 722     if( p_vout->b_error )
 723     {
 724         /* Destroy thread structures allocated by Create and InitThread */
 725         DestroyThread( p_vout );
 726         return;
 727     }
 728
 729     /*
 730      * Main loop - it is not executed if an error occured during
 731      * initialization
 732      */
 733     while( (!p_vout->b_die) && (!p_vout->b_error) )
 734     {
 735         /* Initialize loop variables */
 736         p_picture = NULL;
 737         display_date = 0;
 738         current_date = mdate();
 739
 740 #if 0
 741         p_vout->c_loops++;
 742         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 743         {
 744             msg_Dbg( p_vout, "picture heap: %d/%d",
 745                      I_RENDERPICTURES, p_vout->i_heap_size );
 746         }
 747 #endif
 748
 749         /*
 750          * Find the picture to display (the one with the earliest date).
 751          * This operation does not need lock, since only READY_PICTUREs
 752          * are handled. */
 753         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 754         {
 755             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 756                 && ( (p_picture == NULL) ||
 757                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 758             {
 759                 p_picture = PP_RENDERPICTURE[i_index];
 760                 display_date = p_picture->date;
 761             }
 762         }
 763
 764         if( p_picture )
 765         {
 766             /* If we met the last picture, parse again to see whether there is
 767              * a more appropriate one. */
 768             if( p_picture == p_last_picture )
 769             {
 770                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 771                 {
 772                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 773                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 774                         && ((p_picture == p_last_picture) ||
 775                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 776                     {
 777                         p_picture = PP_RENDERPICTURE[i_index];
 778                         display_date = p_picture->date;
 779                     }
 780                 }
 781             }
 782
 783             /* If we found better than the last picture, destroy it */
 784             if( p_last_picture && p_picture != p_last_picture )
 785             {
 786                 vlc_mutex_lock( &p_vout->picture_lock );
 787                 if( p_last_picture->i_refcount )
 788                 {
 789                     p_last_picture->i_status = DISPLAYED_PICTURE;
 790                 }
 791                 else
 792                 {
 793                     p_last_picture->i_status = DESTROYED_PICTURE;
 794                     p_vout->i_heap_size--;
 795                 }
 796                 vlc_mutex_unlock( &p_vout->picture_lock );
 797                 p_last_picture = NULL;
 798             }
 799
 800             /* Compute FPS rate */
 801             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 802                 = display_date;
 803
 804             if( !p_picture->b_force &&
 805                 p_picture != p_last_picture &&
 806                 display_date < current_date + p_vout->render_time )
 807             {
 808                 /* Picture is late: it will be destroyed and the thread
 809                  * will directly choose the next picture */
 810                 vlc_mutex_lock( &p_vout->picture_lock );
 811                 if( p_picture->i_refcount )
 812                 {
 813                     /* Pretend we displayed the picture, but don't destroy
 814                      * it since the decoder might still need it. */
 815                     p_picture->i_status = DISPLAYED_PICTURE;
 816                 }
 817                 else
 818                 {
 819                     /* Destroy the picture without displaying it */
 820                     p_picture->i_status = DESTROYED_PICTURE;
 821                     p_vout->i_heap_size--;
 822                 }
 823                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 824                                   current_date - display_date );
 825                 vlc_mutex_unlock( &p_vout->picture_lock );
 826
 827                 continue;
 828             }
 829
 830             if( display_date >
 831                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 832             {
 833                 /* Picture is waaay too early: it will be destroyed */
 834                 vlc_mutex_lock( &p_vout->picture_lock );
 835                 if( p_picture->i_refcount )
 836                 {
 837                     /* Pretend we displayed the picture, but don't destroy
 838                      * it since the decoder might still need it. */
 839                     p_picture->i_status = DISPLAYED_PICTURE;
 840                 }
 841                 else
 842                 {
 843                     /* Destroy the picture without displaying it */
 844                     p_picture->i_status = DESTROYED_PICTURE;
 845                     p_vout->i_heap_size--;
 846                 }
 847                 msg_Warn( p_vout, "vout warning: early picture skipped "
 848                           "("I64Fd")", display_date - current_date
 849                           - p_vout->i_pts_delay );
 850                 vlc_mutex_unlock( &p_vout->picture_lock );
 851
 852                 continue;
 853             }
 854
 855             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 856             {
 857                 /* A picture is ready to be rendered, but its rendering date
 858                  * is far from the current one so the thread will perform an
 859                  * empty loop as if no picture were found. The picture state
 860                  * is unchanged */
 861                 p_picture    = NULL;
 862                 display_date = 0;
 863             }
 864             else if( p_picture == p_last_picture )
 865             {
 866                 /* We are asked to repeat the previous picture, but we first
 867                  * wait for a couple of idle loops */
 868                 if( i_idle_loops < 4 )
 869                 {
 870                     p_picture    = NULL;
 871                     display_date = 0;
 872                 }
 873                 else
 874                 {
 875                     /* We set the display date to something high, otherwise
 876                      * we'll have lots of problems with late pictures */
 877                     display_date = current_date + p_vout->render_time;
 878                 }
 879             }
 880         }
 881
 882         if( p_picture == NULL )
 883         {
 884             i_idle_loops++;
 885         }
 886
 887         /*
 888          * Check for subpictures to display
 889          */
 890         p_subpic = vout_SortSubPictures( p_vout, display_date );
 891
 892         /*
 893          * Perform rendering
 894          */
 895         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 896
 897         /*
 898          * Call the plugin-specific rendering method if there is one
 899          */
 900         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 901         {
 902             /* Render the direct buffer returned by vout_RenderPicture */
 903             p_vout->pf_render( p_vout, p_directbuffer );
 904         }
 905
 906         /*
 907          * Sleep, wake up
 908          */
 909         if( display_date != 0 && p_directbuffer != NULL )
 910         {
 911             mtime_t current_render_time = mdate() - current_date;
 912             /* if render time is very large we don't include it in the mean */
 913             if( current_render_time < p_vout->render_time +
 914                 VOUT_DISPLAY_DELAY )
 915             {
 916                 /* Store render time using a sliding mean weighting to
 917                  * current value in a 3 to 1 ratio*/
 918                 p_vout->render_time *= 3;
 919                 p_vout->render_time += current_render_time;
 920                 p_vout->render_time >>= 2;
 921             }
 922         }
 923
 924         /* Give back change lock */
 925         vlc_mutex_unlock( &p_vout->change_lock );
 926
 927         /* Sleep a while or until a given date */
 928         if( display_date != 0 )
 929         {
 930             /* If there are filters in the chain, better give them the picture
 931              * in advance */
 932             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 933             {
 934                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 935             }
 936         }
 937         else
 938         {
 939             msleep( VOUT_IDLE_SLEEP );
 940         }
 941
 942         /* On awakening, take back lock and send immediately picture
 943          * to display. */
 944         vlc_mutex_lock( &p_vout->change_lock );
 945
 946         /*
 947          * Display the previously rendered picture
 948          */
 949         if( p_picture != NULL && p_directbuffer != NULL )
 950         {
 951             /* Display the direct buffer returned by vout_RenderPicture */
 952             if( p_vout->pf_display )
 953             {
 954                 p_vout->pf_display( p_vout, p_directbuffer );
 955             }
 956
 957             /* Reinitialize idle loop count */
 958             i_idle_loops = 0;
 959
 960             /* Tell the vout this was the last picture and that it does not
 961              * need to be forced anymore. */
 962             p_last_picture = p_picture;
 963             p_last_picture->b_force = 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 occured, 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
1009     /*
1010      * Error loop - wait until the thread destruction is requested
1011      */
1012     if( p_vout->b_error )
1013     {
1014         ErrorThread( p_vout );
1015     }
1016
1017     /* End of thread */
1018     EndThread( p_vout );
1019
1020     /* Destroy thread structures allocated by CreateThread */
1021     DestroyThread( p_vout );
1022 }
1023
1024 /*****************************************************************************
1025  * ErrorThread: RunThread() error loop
1026  *****************************************************************************
1027  * This function is called when an error occured during thread main's loop. The
1028  * thread can still receive feed, but must be ready to terminate as soon as
1029  * possible.
1030  *****************************************************************************/
1031 static void ErrorThread( vout_thread_t *p_vout )
1032 {
1033     /* Wait until a `die' order */
1034     while( !p_vout->b_die )
1035     {
1036         /* Sleep a while */
1037         msleep( VOUT_IDLE_SLEEP );
1038     }
1039 }
1040
1041 /*****************************************************************************
1042  * EndThread: thread destruction
1043  *****************************************************************************
1044  * This function is called when the thread ends after a sucessful
1045  * initialization. It frees all ressources allocated by InitThread.
1046  *****************************************************************************/
1047 static void EndThread( vout_thread_t *p_vout )
1048 {
1049     int     i_index;                                        /* index in heap */
1050
1051 #ifdef STATS
1052     {
1053         struct tms cpu_usage;
1054         times( &cpu_usage );
1055
1056         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1057                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1058     }
1059 #endif
1060
1061     if( !p_vout->b_direct )
1062     {
1063         module_Unneed( p_vout, p_vout->chroma.p_module );
1064     }
1065
1066     /* Destroy all remaining pictures */
1067     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1068     {
1069         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1070         {
1071             free( p_vout->p_picture[i_index].p_data_orig );
1072         }
1073     }
1074
1075     /* Destroy all remaining subpictures */
1076     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1077     {
1078         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1079         {
1080             vout_DestroySubPicture( p_vout,
1081                                     &p_vout->p_subpicture[i_index] );
1082         }
1083     }
1084
1085     if( p_vout->p_text_renderer_module )
1086         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1087
1088     /* Destroy translation tables */
1089     p_vout->pf_end( p_vout );
1090
1091     /* Release the change lock */
1092     vlc_mutex_unlock( &p_vout->change_lock );
1093 }
1094
1095 /*****************************************************************************
1096  * DestroyThread: thread destruction
1097  *****************************************************************************
1098  * This function is called when the thread ends. It frees all ressources
1099  * allocated by CreateThread. Status is available at this stage.
1100  *****************************************************************************/
1101 static void DestroyThread( vout_thread_t *p_vout )
1102 {
1103     /* Destroy the locks */
1104     vlc_mutex_destroy( &p_vout->picture_lock );
1105     vlc_mutex_destroy( &p_vout->subpicture_lock );
1106     vlc_mutex_destroy( &p_vout->change_lock );
1107
1108     /* Release the module */
1109     module_Unneed( p_vout, p_vout->p_module );
1110 }
1111
1112 /* following functions are local */
1113
1114 static int ReduceHeight( int i_ratio )
1115 {
1116     int i_dummy = VOUT_ASPECT_FACTOR;
1117     int i_pgcd  = 1;
1118
1119     if( !i_ratio )
1120     {
1121         return i_pgcd;
1122     }
1123
1124     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1125     while( !(i_ratio & 1) && !(i_dummy & 1) )
1126     {
1127         i_ratio >>= 1;
1128         i_dummy >>= 1;
1129         i_pgcd  <<= 1;
1130     }
1131
1132     while( !(i_ratio % 3) && !(i_dummy % 3) )
1133     {
1134         i_ratio /= 3;
1135         i_dummy /= 3;
1136         i_pgcd  *= 3;
1137     }
1138
1139     while( !(i_ratio % 5) && !(i_dummy % 5) )
1140     {
1141         i_ratio /= 5;
1142         i_dummy /= 5;
1143         i_pgcd  *= 5;
1144     }
1145
1146     return i_pgcd;
1147 }
1148
1149 /*****************************************************************************
1150  * BinaryLog: computes the base 2 log of a binary value
1151  *****************************************************************************
1152  * This functions is used by MaskToShift, to get a bit index from a binary
1153  * value.
1154  *****************************************************************************/
1155 static int BinaryLog( uint32_t i )
1156 {
1157     int i_log = 0;
1158
1159     if( i == 0 ) return -31337;
1160
1161     if( i & 0xffff0000 ) i_log += 16;
1162     if( i & 0xff00ff00 ) i_log += 8;
1163     if( i & 0xf0f0f0f0 ) i_log += 4;
1164     if( i & 0xcccccccc ) i_log += 2;
1165     if( i & 0xaaaaaaaa ) i_log += 1;
1166
1167     return i_log;
1168 }
1169
1170 /*****************************************************************************
1171  * MaskToShift: transform a color mask into right and left shifts
1172  *****************************************************************************
1173  * This function is used for obtaining color shifts from masks.
1174  *****************************************************************************/
1175 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1176 {
1177     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1178
1179     if( !i_mask )
1180     {
1181         *pi_left = *pi_right = 0;
1182         return;
1183     }
1184
1185     /* Get bits */
1186     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1187     i_high = i_mask + i_low;                       /* higher bit of the mask */
1188
1189     /* Transform bits into an index */
1190     i_low =  BinaryLog (i_low);
1191     i_high = BinaryLog (i_high);
1192
1193     /* Update pointers and return */
1194     *pi_left =   i_low;
1195     *pi_right = (8 - i_high + i_low);
1196 }
1197
1198 /*****************************************************************************
1199  * InitWindowSize: find the initial dimensions the video window should have.
1200  *****************************************************************************
1201  * This function will check the "width", "height" and "zoom" config options and
1202  * will calculate the size that the video window should have.
1203  *****************************************************************************/
1204 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1205                             int *pi_height )
1206 {
1207     vlc_value_t val;
1208     int i_width, i_height;
1209     uint64_t ll_zoom;
1210
1211 #define FP_FACTOR 1000                             /* our fixed point factor */
1212
1213     var_Get( p_vout, "align", &val );
1214     p_vout->i_alignment = val.i_int;
1215
1216     var_Get( p_vout, "width", &val );
1217     i_width = val.i_int;
1218     var_Get( p_vout, "height", &val );
1219     i_height = val.i_int;
1220     var_Get( p_vout, "zoom", &val );
1221     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1222
1223     if( i_width > 0 && i_height > 0)
1224     {
1225         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1226         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1227         return;
1228     }
1229     else if( i_width > 0 )
1230     {
1231         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1232         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1233                             p_vout->render.i_aspect / FP_FACTOR );
1234         return;
1235     }
1236     else if( i_height > 0 )
1237     {
1238         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1239         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1240                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1241         return;
1242     }
1243
1244     if( p_vout->render.i_height * p_vout->render.i_aspect
1245         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1246     {
1247         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1248           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1249         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1250     }
1251     else
1252     {
1253         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1254         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1255           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1256     }
1257
1258 #undef FP_FACTOR
1259 }
1260
1261 /*****************************************************************************
1262  * vout_VarCallback: generic callback for intf variables
1263  *****************************************************************************/
1264 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1265                       vlc_value_t old_value, vlc_value_t new_value,
1266                       void * unused )
1267 {
1268     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1269     vlc_value_t val;
1270     val.b_bool = VLC_TRUE;
1271     var_Set( p_vout, "intf-change", val );
1272     return VLC_SUCCESS;
1273 }
1274
1275 /*****************************************************************************
1276  * object variables callbacks: a bunch of object variables are used by the
1277  * interfaces to interact with the vout.
1278  *****************************************************************************/
1279 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
1280                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1281 {
1282     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1283     input_thread_t *p_input;
1284     vlc_value_t val;
1285
1286     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
1287
1288     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1289                                                  FIND_PARENT );
1290     if( p_input )
1291     {
1292         /* Modify input as well because the vout might have to be restarted */
1293         var_Create( p_input, "fullscreen", VLC_VAR_BOOL );
1294         var_Set( p_input, "fullscreen", newval );
1295
1296         vlc_object_release( p_input );
1297     }
1298
1299     val.b_bool = VLC_TRUE;
1300     var_Set( p_vout, "intf-change", val );
1301     return VLC_SUCCESS;
1302 }
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     unsigned int  i;
1314
1315     psz_filter = config_GetPsz( p_vout, "filter" );
1316
1317     if( !psz_mode || !*psz_mode )
1318     {
1319         config_PutPsz( p_vout, "filter", "" );
1320     }
1321     else
1322     {
1323         if( !psz_filter || !*psz_filter )
1324         {
1325             config_PutPsz( p_vout, "filter", "deinterlace" );
1326         }
1327         else
1328         {
1329             if( strstr( psz_filter, "deinterlace" ) == NULL )
1330             {
1331                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1332                 strcat( psz_filter, ",deinterlace" );
1333             }
1334             config_PutPsz( p_vout, "filter", psz_filter );
1335         }
1336     }
1337
1338     if( psz_filter ) free( psz_filter );
1339
1340
1341     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1342                                                  FIND_PARENT );
1343     if( !p_input ) return VLC_EGENERIC;
1344
1345     if( psz_mode && *psz_mode )
1346     {
1347         val.psz_string = psz_mode;
1348         var_Set( p_vout, "deinterlace-mode", val );
1349         /* Modify input as well because the vout might have to be restarted */
1350         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1351         var_Set( p_input, "deinterlace-mode", val );
1352     }
1353
1354     /* now restart all video streams */
1355     vlc_mutex_lock( &p_input->stream.stream_lock );
1356
1357     p_vout->b_filter_change = VLC_TRUE;
1358
1359 #define ES p_input->stream.pp_es[i]
1360
1361     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1362     {
1363         if( ( ES->i_cat == VIDEO_ES ) && ES->p_decoder_fifo != NULL )
1364         {
1365             input_UnselectES( p_input, ES );
1366             input_SelectES( p_input, ES );
1367         }
1368 #undef ES
1369     }
1370     vlc_mutex_unlock( &p_input->stream.stream_lock );
1371
1372     vlc_object_release( p_input );
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     /* Restart the video stream */
1396     vlc_mutex_lock( &p_input->stream.stream_lock );
1397
1398     p_vout->b_filter_change = VLC_TRUE;
1399
1400 #define ES p_input->stream.pp_es[i]
1401
1402     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1403     {
1404         if( ( ES->i_cat == VIDEO_ES ) && ES->p_decoder_fifo != NULL )
1405         {
1406             input_UnselectES( p_input, ES );
1407             input_SelectES( p_input, ES );
1408         }
1409 #undef ES
1410     }
1411     vlc_mutex_unlock( &p_input->stream.stream_lock );
1412
1413     vlc_object_release( p_input );
1414
1415     val.b_bool = VLC_TRUE;
1416     var_Set( p_vout, "intf-change", val );
1417     return VLC_SUCCESS;
1418 }
1419