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 and subpictures - 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     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 247     {
 248         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 249         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 250     }
 251
 252     /* No images in the heap */
 253     p_vout->i_heap_size = 0;
 254
 255     /* Register the default subpicture channel */
 256     p_vout->p_default_channel = NULL;
 257     p_vout->i_channel_count = 1;
 258
 259     /* Initialize the rendering heap */
 260     I_RENDERPICTURES = 0;
 261     p_vout->render.i_width    = i_width;
 262     p_vout->render.i_height   = i_height;
 263     p_vout->render.i_chroma   = i_chroma;
 264     p_vout->render.i_aspect   = i_aspect;
 265
 266     p_vout->render.i_rmask    = 0;
 267     p_vout->render.i_gmask    = 0;
 268     p_vout->render.i_bmask    = 0;
 269
 270     p_vout->render.i_last_used_pic = -1;
 271     p_vout->render.b_allow_modify_pics = 1;
 272
 273     /* Zero the output heap */
 274     I_OUTPUTPICTURES = 0;
 275     p_vout->output.i_width    = 0;
 276     p_vout->output.i_height   = 0;
 277     p_vout->output.i_chroma   = 0;
 278     p_vout->output.i_aspect   = 0;
 279
 280     p_vout->output.i_rmask    = 0;
 281     p_vout->output.i_gmask    = 0;
 282     p_vout->output.i_bmask    = 0;
 283
 284     /* Initialize misc stuff */
 285     p_vout->i_changes    = 0;
 286     p_vout->f_gamma      = 0;
 287     p_vout->b_grayscale  = 0;
 288     p_vout->b_info       = 0;
 289     p_vout->b_interface  = 0;
 290     p_vout->b_scale      = 1;
 291     p_vout->b_fullscreen = 0;
 292     p_vout->i_alignment  = 0;
 293     p_vout->render_time  = 10;
 294     p_vout->c_fps_samples = 0;
 295     p_vout->b_filter_change = 0;
 296     p_vout->pf_control = 0;
 297     p_vout->p_parent_intf = 0;
 298
 299     /* Mouse coordinates */
 300     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 301     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 302     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 303     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 304     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 305
 306     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 307     val.b_bool = VLC_TRUE;
 308     var_Set( p_vout, "intf-change", val );
 309
 310     /* Initialize locks */
 311     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 312     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 313     vlc_mutex_init( p_vout, &p_vout->change_lock );
 314
 315     /* Attach the new object now so we can use var inheritance below */
 316     vlc_object_attach( p_vout, p_parent );
 317
 318     /* Take care of some "interface/control" related initialisations */
 319     vout_IntfInit( p_vout );
 320
 321     p_vout->b_override_aspect = VLC_FALSE;
 322
 323     /* If the parent is not a VOUT object, that means we are at the start of
 324      * the video output pipe */
 325     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 326     {
 327         var_Get( p_vout, "aspect-ratio", &val );
 328
 329         /* Check whether the user tried to override aspect ratio */
 330         if( val.psz_string )
 331         {
 332             unsigned int i_new_aspect = i_aspect;
 333             char *psz_parser = strchr( val.psz_string, ':' );
 334
 335             if( psz_parser )
 336             {
 337                 *psz_parser++ = '\0';
 338                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 339                                                       / atoi( psz_parser );
 340             }
 341             else
 342             {
 343                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 344                                        * atof( val.psz_string )
 345                                        / i_height;
 346             }
 347
 348             free( val.psz_string );
 349
 350             if( i_new_aspect && i_new_aspect != i_aspect )
 351             {
 352                 unsigned int i_aspect_x, i_aspect_y;
 353
 354                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 355
 356                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 357                          i_aspect_x, i_aspect_y );
 358
 359                 p_vout->render.i_aspect = i_new_aspect;
 360
 361                 p_vout->b_override_aspect = VLC_TRUE;
 362             }
 363         }
 364
 365         /* Look for the default filter configuration */
 366         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 367         var_Get( p_vout, "filter", &val );
 368         p_vout->psz_filter_chain = val.psz_string;
 369     }
 370     else
 371     {
 372         /* continue the parent's filter chain */
 373         char *psz_end;
 374
 375         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 376         if( psz_end && *(psz_end+1) )
 377             p_vout->psz_filter_chain = strdup( psz_end+1 );
 378         else p_vout->psz_filter_chain = NULL;
 379     }
 380
 381     /* Choose the video output module */
 382     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 383     {
 384         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 385         var_Get( p_vout, "vout", &val );
 386         psz_plugin = val.psz_string;
 387     }
 388     else
 389     {
 390         /* the filter chain is a string list of filters separated by double
 391          * colons */
 392         char *psz_end;
 393
 394         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 395         if( psz_end )
 396             psz_plugin = strndup( p_vout->psz_filter_chain,
 397                                   psz_end - p_vout->psz_filter_chain );
 398         else psz_plugin = strdup( p_vout->psz_filter_chain );
 399     }
 400
 401     /* Initialize the dimensions of the video window */
 402     InitWindowSize( p_vout, &p_vout->i_window_width,
 403                     &p_vout->i_window_height );
 404
 405     /* Create the vout thread */
 406     p_vout->p_module = module_Need( p_vout,
 407         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 408         "video filter" : "video output", psz_plugin, 0 );
 409
 410     if( psz_plugin ) free( psz_plugin );
 411     if( p_vout->p_module == NULL )
 412     {
 413         msg_Err( p_vout, "no suitable vout module" );
 414         vlc_object_detach( p_vout );
 415         vlc_object_destroy( p_vout );
 416         return NULL;
 417     }
 418
 419     p_vout->p_text_renderer_module =
 420         module_Need( p_vout, "text renderer", NULL, 0 );
 421     if( p_vout->p_text_renderer_module == NULL )
 422     {
 423         msg_Warn( p_vout, "no suitable text renderer module" );
 424         p_vout->pf_add_string = NULL;
 425     }
 426
 427     /* Create a few object variables for interface interaction */
 428     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 429     text.psz_string = _("Deinterlace");
 430     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 431     val.psz_string = ""; text.psz_string = _("Disable");
 432     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 433     val.psz_string = "discard"; text.psz_string = _("Discard");
 434     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 435     val.psz_string = "blend"; text.psz_string = _("Blend");
 436     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 437     val.psz_string = "mean"; text.psz_string = _("Mean");
 438     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 439     val.psz_string = "bob"; text.psz_string = _("Bob");
 440     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 441     val.psz_string = "linear"; text.psz_string = _("Linear");
 442     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 443     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 444     {
 445         var_Set( p_vout, "deinterlace", val );
 446         if( val.psz_string ) free( val.psz_string );
 447     }
 448     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 449
 450
 451     var_Create( p_vout, "filter", VLC_VAR_STRING );
 452     text.psz_string = _("Filters");
 453     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 454     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 455     if( val.psz_string )
 456     {
 457         var_Set( p_vout, "filter", val );
 458         free( val.psz_string );
 459     }
 460     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 461
 462     /* Calculate delay created by internal caching */
 463     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 464                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 465     if( p_input_thread )
 466     {
 467         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 468         vlc_object_release( p_input_thread );
 469     }
 470     else
 471     {
 472         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 473     }
 474
 475     if( vlc_thread_create( p_vout, "video output", RunThread,
 476                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 477     {
 478         msg_Err( p_vout, "out of memory" );
 479         module_Unneed( p_vout, p_vout->p_module );
 480         vlc_object_detach( p_vout );
 481         vlc_object_destroy( p_vout );
 482         return NULL;
 483     }
 484
 485     if( p_vout->b_error )
 486     {
 487         msg_Err( p_vout, "video output creation failed" );
 488
 489         /* Make sure the thread is destroyed */
 490         p_vout->b_die = VLC_TRUE;
 491
 492         if( p_vout->p_text_renderer_module )
 493         {
 494             module_Unneed( p_vout, p_vout->p_text_renderer_module );
 495         }
 496         vlc_thread_join( p_vout );
 497
 498         vlc_object_detach( p_vout );
 499         vlc_object_destroy( p_vout );
 500         return NULL;
 501     }
 502
 503     return p_vout;
 504 }
 505
 506 /*****************************************************************************
 507  * vout_Destroy: destroys a previously created video output
 508  *****************************************************************************
 509  * Destroy a terminated thread.
 510  * The function will request a destruction of the specified thread. If pi_error
 511  * is NULL, it will return once the thread is destroyed. Else, it will be
 512  * update using one of the THREAD_* constants.
 513  *****************************************************************************/
 514 void vout_Destroy( vout_thread_t *p_vout )
 515 {
 516     vlc_object_t *p_playlist;
 517
 518     /* Request thread destruction */
 519     p_vout->b_die = VLC_TRUE;
 520     vlc_thread_join( p_vout );
 521
 522     var_Destroy( p_vout, "intf-change" );
 523
 524     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 525                                   FIND_ANYWHERE );
 526
 527     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 528
 529     /* Free structure */
 530     vlc_object_destroy( p_vout );
 531
 532     /* If it was the last vout, tell the interface to show up */
 533     if( p_playlist != NULL )
 534     {
 535         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 536                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 537         if( p_another_vout == NULL )
 538         {
 539             vlc_value_t val;
 540             val.b_bool = VLC_TRUE;
 541             var_Set( p_playlist, "intf-show", val );
 542         }
 543         else
 544         {
 545             vlc_object_release( p_another_vout );
 546         }
 547         vlc_object_release( p_playlist );
 548     }
 549 }
 550
 551 /*****************************************************************************
 552  * InitThread: initialize video output thread
 553  *****************************************************************************
 554  * This function is called from RunThread and performs the second step of the
 555  * initialization. It returns 0 on success. Note that the thread's flag are not
 556  * modified inside this function.
 557  *****************************************************************************/
 558 static int InitThread( vout_thread_t *p_vout )
 559 {
 560     int i;
 561     unsigned int i_aspect_x, i_aspect_y;
 562
 563     vlc_mutex_lock( &p_vout->change_lock );
 564
 565 #ifdef STATS
 566     p_vout->c_loops = 0;
 567 #endif
 568
 569     /* Initialize output method, it allocates direct buffers for us */
 570     if( p_vout->pf_init( p_vout ) )
 571     {
 572         vlc_mutex_unlock( &p_vout->change_lock );
 573         return VLC_EGENERIC;
 574     }
 575
 576     if( !I_OUTPUTPICTURES )
 577     {
 578         msg_Err( p_vout, "plugin was unable to allocate at least "
 579                          "one direct buffer" );
 580         p_vout->pf_end( p_vout );
 581         vlc_mutex_unlock( &p_vout->change_lock );
 582         return VLC_EGENERIC;
 583     }
 584
 585     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 586     {
 587         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 588                          "our internal buffers must have overflown." );
 589         p_vout->pf_end( p_vout );
 590         vlc_mutex_unlock( &p_vout->change_lock );
 591         return VLC_EGENERIC;
 592     }
 593
 594     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 595
 596 #if 0
 597     if( !p_vout->psz_filter_chain )
 598     {
 599         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 600
 601         if( psz_aspect )
 602         {
 603             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 604                                                       * atof( psz_aspect )
 605                                                       / p_vout->output.i_height;
 606             free( psz_aspect );
 607
 608             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 609             {
 610                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 611
 612                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 613                          i_aspect_x, i_aspect_y );
 614                 p_vout->output.i_aspect = i_new_aspect;
 615             }
 616         }
 617     }
 618 #endif
 619
 620     vout_AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 621     msg_Dbg( p_vout,
 622              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 623              p_vout->render.i_width, p_vout->render.i_height,
 624              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 625              i_aspect_x, i_aspect_y );
 626
 627     vout_AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 628     msg_Dbg( p_vout,
 629              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 630              p_vout->output.i_width, p_vout->output.i_height,
 631              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 632              i_aspect_x, i_aspect_y );
 633
 634     /* Calculate shifts from system-updated masks */
 635     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 636                  p_vout->output.i_rmask );
 637     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 638                  p_vout->output.i_gmask );
 639     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 640                  p_vout->output.i_bmask );
 641
 642     /* Check whether we managed to create direct buffers similar to
 643      * the render buffers, ie same size and chroma */
 644     if( ( p_vout->output.i_width == p_vout->render.i_width )
 645      && ( p_vout->output.i_height == p_vout->render.i_height )
 646      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 647     {
 648         /* Cool ! We have direct buffers, we can ask the decoder to
 649          * directly decode into them ! Map the first render buffers to
 650          * the first direct buffers, but keep the first direct buffer
 651          * for memcpy operations */
 652         p_vout->b_direct = 1;
 653
 654         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 655         {
 656             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 657                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 658                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 659             {
 660                 /* We have enough direct buffers so there's no need to
 661                  * try to use system memory buffers. */
 662                 break;
 663             }
 664             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 665             I_RENDERPICTURES++;
 666         }
 667
 668         msg_Dbg( p_vout, "direct render, mapping "
 669                  "render pictures 0-%i to system pictures 1-%i",
 670                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 671     }
 672     else
 673     {
 674         /* Rats... Something is wrong here, we could not find an output
 675          * plugin able to directly render what we decode. See if we can
 676          * find a chroma plugin to do the conversion */
 677         p_vout->b_direct = 0;
 678
 679         /* Choose the best module */
 680         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 681
 682         if( p_vout->chroma.p_module == NULL )
 683         {
 684             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 685                      (char*)&p_vout->render.i_chroma,
 686                      (char*)&p_vout->output.i_chroma );
 687             p_vout->pf_end( p_vout );
 688             vlc_mutex_unlock( &p_vout->change_lock );
 689             return VLC_EGENERIC;
 690         }
 691
 692         msg_Dbg( p_vout, "indirect render, mapping "
 693                  "render pictures 0-%i to system pictures %i-%i",
 694                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 695                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 696
 697         /* Append render buffers after the direct buffers */
 698         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 699         {
 700             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 701             I_RENDERPICTURES++;
 702
 703             /* Check if we have enough render pictures */
 704             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 705                 break;
 706         }
 707     }
 708
 709     /* Link pictures back to their heap */
 710     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 711     {
 712         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 713     }
 714
 715     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 716     {
 717         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 718     }
 719
 720 /* XXX XXX mark thread ready */
 721     return VLC_SUCCESS;
 722 }
 723
 724 /*****************************************************************************
 725  * RunThread: video output thread
 726  *****************************************************************************
 727  * Video output thread. This function does only returns when the thread is
 728  * terminated. It handles the pictures arriving in the video heap and the
 729  * display device events.
 730  *****************************************************************************/
 731 static void RunThread( vout_thread_t *p_vout)
 732 {
 733     int             i_index;                                /* index in heap */
 734     int             i_idle_loops = 0;  /* loops without displaying a picture */
 735     mtime_t         current_date;                            /* current date */
 736     mtime_t         display_date;                            /* display date */
 737
 738     picture_t *     p_picture;                            /* picture pointer */
 739     picture_t *     p_last_picture = NULL;                   /* last picture */
 740     picture_t *     p_directbuffer;              /* direct buffer to display */
 741
 742     subpicture_t *  p_subpic;                          /* subpicture pointer */
 743
 744     /*
 745      * Initialize thread
 746      */
 747     p_vout->b_error = InitThread( p_vout );
 748
 749     /* signal the creation of the vout */
 750     vlc_thread_ready( p_vout );
 751
 752     if( p_vout->b_error )
 753     {
 754         /* Destroy thread structures allocated by Create and InitThread */
 755         DestroyThread( p_vout );
 756         return;
 757     }
 758
 759     /*
 760      * Main loop - it is not executed if an error occured during
 761      * initialization
 762      */
 763     while( (!p_vout->b_die) && (!p_vout->b_error) )
 764     {
 765         /* Initialize loop variables */
 766         p_picture = NULL;
 767         display_date = 0;
 768         current_date = mdate();
 769
 770 #if 0
 771         p_vout->c_loops++;
 772         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 773         {
 774             msg_Dbg( p_vout, "picture heap: %d/%d",
 775                      I_RENDERPICTURES, p_vout->i_heap_size );
 776         }
 777 #endif
 778
 779         /*
 780          * Find the picture to display (the one with the earliest date).
 781          * This operation does not need lock, since only READY_PICTUREs
 782          * are handled. */
 783         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 784         {
 785             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 786                 && ( (p_picture == NULL) ||
 787                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 788             {
 789                 p_picture = PP_RENDERPICTURE[i_index];
 790                 display_date = p_picture->date;
 791             }
 792         }
 793
 794         if( p_picture )
 795         {
 796             /* If we met the last picture, parse again to see whether there is
 797              * a more appropriate one. */
 798             if( p_picture == p_last_picture )
 799             {
 800                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 801                 {
 802                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 803                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 804                         && ((p_picture == p_last_picture) ||
 805                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 806                     {
 807                         p_picture = PP_RENDERPICTURE[i_index];
 808                         display_date = p_picture->date;
 809                     }
 810                 }
 811             }
 812
 813             /* If we found better than the last picture, destroy it */
 814             if( p_last_picture && p_picture != p_last_picture )
 815             {
 816                 vlc_mutex_lock( &p_vout->picture_lock );
 817                 if( p_last_picture->i_refcount )
 818                 {
 819                     p_last_picture->i_status = DISPLAYED_PICTURE;
 820                 }
 821                 else
 822                 {
 823                     p_last_picture->i_status = DESTROYED_PICTURE;
 824                     p_vout->i_heap_size--;
 825                 }
 826                 vlc_mutex_unlock( &p_vout->picture_lock );
 827                 p_last_picture = NULL;
 828             }
 829
 830             /* Compute FPS rate */
 831             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 832                 = display_date;
 833
 834             if( !p_picture->b_force &&
 835                 p_picture != p_last_picture &&
 836                 display_date < current_date + p_vout->render_time )
 837             {
 838                 /* Picture is late: it will be destroyed and the thread
 839                  * will directly choose the next picture */
 840                 vlc_mutex_lock( &p_vout->picture_lock );
 841                 if( p_picture->i_refcount )
 842                 {
 843                     /* Pretend we displayed the picture, but don't destroy
 844                      * it since the decoder might still need it. */
 845                     p_picture->i_status = DISPLAYED_PICTURE;
 846                 }
 847                 else
 848                 {
 849                     /* Destroy the picture without displaying it */
 850                     p_picture->i_status = DESTROYED_PICTURE;
 851                     p_vout->i_heap_size--;
 852                 }
 853                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 854                                   current_date - display_date );
 855                 vlc_mutex_unlock( &p_vout->picture_lock );
 856
 857                 continue;
 858             }
 859
 860             if( display_date >
 861                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 862             {
 863                 /* Picture is waaay too early: it will be destroyed */
 864                 vlc_mutex_lock( &p_vout->picture_lock );
 865                 if( p_picture->i_refcount )
 866                 {
 867                     /* Pretend we displayed the picture, but don't destroy
 868                      * it since the decoder might still need it. */
 869                     p_picture->i_status = DISPLAYED_PICTURE;
 870                 }
 871                 else
 872                 {
 873                     /* Destroy the picture without displaying it */
 874                     p_picture->i_status = DESTROYED_PICTURE;
 875                     p_vout->i_heap_size--;
 876                 }
 877                 msg_Warn( p_vout, "vout warning: early picture skipped "
 878                           "("I64Fd")", display_date - current_date
 879                           - p_vout->i_pts_delay );
 880                 vlc_mutex_unlock( &p_vout->picture_lock );
 881
 882                 continue;
 883             }
 884
 885             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 886             {
 887                 /* A picture is ready to be rendered, but its rendering date
 888                  * is far from the current one so the thread will perform an
 889                  * empty loop as if no picture were found. The picture state
 890                  * is unchanged */
 891                 p_picture    = NULL;
 892                 display_date = 0;
 893             }
 894             else if( p_picture == p_last_picture )
 895             {
 896                 /* We are asked to repeat the previous picture, but we first
 897                  * wait for a couple of idle loops */
 898                 if( i_idle_loops < 4 )
 899                 {
 900                     p_picture    = NULL;
 901                     display_date = 0;
 902                 }
 903                 else
 904                 {
 905                     /* We set the display date to something high, otherwise
 906                      * we'll have lots of problems with late pictures */
 907                     display_date = current_date + p_vout->render_time;
 908                 }
 909             }
 910         }
 911
 912         if( p_picture == NULL )
 913         {
 914             i_idle_loops++;
 915         }
 916
 917         /*
 918          * Check for subpictures to display
 919          */
 920         p_subpic = vout_SortSubPictures( p_vout, display_date );
 921
 922         /*
 923          * Perform rendering
 924          */
 925         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 926
 927         /*
 928          * Call the plugin-specific rendering method if there is one
 929          */
 930         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 931         {
 932             /* Render the direct buffer returned by vout_RenderPicture */
 933             p_vout->pf_render( p_vout, p_directbuffer );
 934         }
 935
 936         /*
 937          * Sleep, wake up
 938          */
 939         if( display_date != 0 && p_directbuffer != NULL )
 940         {
 941             mtime_t current_render_time = mdate() - current_date;
 942             /* if render time is very large we don't include it in the mean */
 943             if( current_render_time < p_vout->render_time +
 944                 VOUT_DISPLAY_DELAY )
 945             {
 946                 /* Store render time using a sliding mean weighting to
 947                  * current value in a 3 to 1 ratio*/
 948                 p_vout->render_time *= 3;
 949                 p_vout->render_time += current_render_time;
 950                 p_vout->render_time >>= 2;
 951             }
 952         }
 953
 954         /* Give back change lock */
 955         vlc_mutex_unlock( &p_vout->change_lock );
 956
 957         /* Sleep a while or until a given date */
 958         if( display_date != 0 )
 959         {
 960             /* If there are filters in the chain, better give them the picture
 961              * in advance */
 962             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 963             {
 964                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 965             }
 966         }
 967         else
 968         {
 969             msleep( VOUT_IDLE_SLEEP );
 970         }
 971
 972         /* On awakening, take back lock and send immediately picture
 973          * to display. */
 974         vlc_mutex_lock( &p_vout->change_lock );
 975
 976         /*
 977          * Display the previously rendered picture
 978          */
 979         if( p_picture != NULL && p_directbuffer != NULL )
 980         {
 981             /* Display the direct buffer returned by vout_RenderPicture */
 982             if( p_vout->pf_display )
 983             {
 984                 p_vout->pf_display( p_vout, p_directbuffer );
 985             }
 986
 987             /* Reinitialize idle loop count */
 988             i_idle_loops = 0;
 989
 990             /* Tell the vout this was the last picture and that it does not
 991              * need to be forced anymore. */
 992             p_last_picture = p_picture;
 993             p_last_picture->b_force = 0;
 994         }
 995
 996         /*
 997          * Check events and manage thread
 998          */
 999         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
1000         {
1001             /* A fatal error occured, and the thread must terminate
1002              * immediately, without displaying anything - setting b_error to 1
1003              * causes the immediate end of the main while() loop. */
1004             p_vout->b_error = 1;
1005         }
1006
1007         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
1008         {
1009             /* this must only happen when the vout plugin is incapable of
1010              * rescaling the picture itself. In this case we need to destroy
1011              * the current picture buffers and recreate new ones with the right
1012              * dimensions */
1013             int i;
1014
1015             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1016
1017             p_vout->pf_end( p_vout );
1018             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1019                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1020
1021             I_OUTPUTPICTURES = 0;
1022             if( p_vout->pf_init( p_vout ) )
1023             {
1024                 msg_Err( p_vout, "cannot resize display" );
1025                 /* FIXME: pf_end will be called again in EndThread() */
1026                 p_vout->b_error = 1;
1027             }
1028
1029             /* Need to reinitialise the chroma plugin */
1030             if( p_vout->chroma.p_module )
1031             {
1032                 if( p_vout->chroma.p_module->pf_deactivate )
1033                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1034                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1035             }
1036         }
1037
1038         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1039         {
1040             /* This happens when the picture buffers need to be recreated.
1041              * This is useful on multimonitor displays for instance.
1042              *
1043              * Warning: This only works when the vout creates only 1 picture
1044              * buffer!! */
1045             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1046
1047             if( !p_vout->b_direct )
1048             {
1049                 module_Unneed( p_vout, p_vout->chroma.p_module );
1050             }
1051
1052             vlc_mutex_lock( &p_vout->picture_lock );
1053
1054             p_vout->pf_end( p_vout );
1055
1056             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1057
1058             p_vout->b_error = InitThread( p_vout );
1059
1060             vlc_mutex_unlock( &p_vout->picture_lock );
1061         }
1062     }
1063
1064     /*
1065      * Error loop - wait until the thread destruction is requested
1066      */
1067     if( p_vout->b_error )
1068     {
1069         ErrorThread( p_vout );
1070     }
1071
1072     /* End of thread */
1073     EndThread( p_vout );
1074
1075     /* Destroy thread structures allocated by CreateThread */
1076     DestroyThread( p_vout );
1077 }
1078
1079 /*****************************************************************************
1080  * ErrorThread: RunThread() error loop
1081  *****************************************************************************
1082  * This function is called when an error occured during thread main's loop. The
1083  * thread can still receive feed, but must be ready to terminate as soon as
1084  * possible.
1085  *****************************************************************************/
1086 static void ErrorThread( vout_thread_t *p_vout )
1087 {
1088     /* Wait until a `die' order */
1089     while( !p_vout->b_die )
1090     {
1091         /* Sleep a while */
1092         msleep( VOUT_IDLE_SLEEP );
1093     }
1094 }
1095
1096 /*****************************************************************************
1097  * EndThread: thread destruction
1098  *****************************************************************************
1099  * This function is called when the thread ends after a sucessful
1100  * initialization. It frees all resources allocated by InitThread.
1101  *****************************************************************************/
1102 static void EndThread( vout_thread_t *p_vout )
1103 {
1104     int     i_index;                                        /* index in heap */
1105
1106 #ifdef STATS
1107     {
1108         struct tms cpu_usage;
1109         times( &cpu_usage );
1110
1111         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1112                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1113     }
1114 #endif
1115
1116     if( !p_vout->b_direct )
1117     {
1118         module_Unneed( p_vout, p_vout->chroma.p_module );
1119     }
1120
1121     /* Destroy all remaining pictures */
1122     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1123     {
1124         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1125         {
1126             free( p_vout->p_picture[i_index].p_data_orig );
1127         }
1128     }
1129
1130     /* Destroy all remaining subpictures */
1131     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1132     {
1133         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1134         {
1135             vout_DestroySubPicture( p_vout,
1136                                     &p_vout->p_subpicture[i_index] );
1137         }
1138     }
1139
1140     if( p_vout->p_text_renderer_module )
1141         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1142
1143     /* Destroy translation tables */
1144     p_vout->pf_end( p_vout );
1145
1146     /* Release the change lock */
1147     vlc_mutex_unlock( &p_vout->change_lock );
1148 }
1149
1150 /*****************************************************************************
1151  * DestroyThread: thread destruction
1152  *****************************************************************************
1153  * This function is called when the thread ends. It frees all ressources
1154  * allocated by CreateThread. Status is available at this stage.
1155  *****************************************************************************/
1156 static void DestroyThread( vout_thread_t *p_vout )
1157 {
1158     /* Destroy the locks */
1159     vlc_mutex_destroy( &p_vout->picture_lock );
1160     vlc_mutex_destroy( &p_vout->subpicture_lock );
1161     vlc_mutex_destroy( &p_vout->change_lock );
1162
1163     /* Release the module */
1164     if( p_vout && p_vout->p_module )
1165     {
1166         module_Unneed( p_vout, p_vout->p_module );
1167     }
1168 }
1169
1170 /* following functions are local */
1171
1172 static int ReduceHeight( int i_ratio )
1173 {
1174     int i_dummy = VOUT_ASPECT_FACTOR;
1175     int i_pgcd  = 1;
1176
1177     if( !i_ratio )
1178     {
1179         return i_pgcd;
1180     }
1181
1182     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1183     while( !(i_ratio & 1) && !(i_dummy & 1) )
1184     {
1185         i_ratio >>= 1;
1186         i_dummy >>= 1;
1187         i_pgcd  <<= 1;
1188     }
1189
1190     while( !(i_ratio % 3) && !(i_dummy % 3) )
1191     {
1192         i_ratio /= 3;
1193         i_dummy /= 3;
1194         i_pgcd  *= 3;
1195     }
1196
1197     while( !(i_ratio % 5) && !(i_dummy % 5) )
1198     {
1199         i_ratio /= 5;
1200         i_dummy /= 5;
1201         i_pgcd  *= 5;
1202     }
1203
1204     return i_pgcd;
1205 }
1206
1207 /*****************************************************************************
1208  * BinaryLog: computes the base 2 log of a binary value
1209  *****************************************************************************
1210  * This functions is used by MaskToShift, to get a bit index from a binary
1211  * value.
1212  *****************************************************************************/
1213 static int BinaryLog( uint32_t i )
1214 {
1215     int i_log = 0;
1216
1217     if( i == 0 ) return -31337;
1218
1219     if( i & 0xffff0000 ) i_log += 16;
1220     if( i & 0xff00ff00 ) i_log += 8;
1221     if( i & 0xf0f0f0f0 ) i_log += 4;
1222     if( i & 0xcccccccc ) i_log += 2;
1223     if( i & 0xaaaaaaaa ) i_log += 1;
1224
1225     return i_log;
1226 }
1227
1228 /*****************************************************************************
1229  * MaskToShift: transform a color mask into right and left shifts
1230  *****************************************************************************
1231  * This function is used for obtaining color shifts from masks.
1232  *****************************************************************************/
1233 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1234 {
1235     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1236
1237     if( !i_mask )
1238     {
1239         *pi_left = *pi_right = 0;
1240         return;
1241     }
1242
1243     /* Get bits */
1244     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1245     i_high = i_mask + i_low;                       /* higher bit of the mask */
1246
1247     /* Transform bits into an index */
1248     i_low =  BinaryLog (i_low);
1249     i_high = BinaryLog (i_high);
1250
1251     /* Update pointers and return */
1252     *pi_left =   i_low;
1253     *pi_right = (8 - i_high + i_low);
1254 }
1255
1256 /*****************************************************************************
1257  * InitWindowSize: find the initial dimensions the video window should have.
1258  *****************************************************************************
1259  * This function will check the "width", "height" and "zoom" config options and
1260  * will calculate the size that the video window should have.
1261  *****************************************************************************/
1262 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1263                             int *pi_height )
1264 {
1265     vlc_value_t val;
1266     int i_width, i_height;
1267     uint64_t ll_zoom;
1268
1269 #define FP_FACTOR 1000                             /* our fixed point factor */
1270
1271     var_Get( p_vout, "align", &val );
1272     p_vout->i_alignment = val.i_int;
1273
1274     var_Get( p_vout, "width", &val );
1275     i_width = val.i_int;
1276     var_Get( p_vout, "height", &val );
1277     i_height = val.i_int;
1278     var_Get( p_vout, "zoom", &val );
1279     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1280
1281     if( i_width > 0 && i_height > 0)
1282     {
1283         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1284         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1285         return;
1286     }
1287     else if( i_width > 0 )
1288     {
1289         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1290         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1291                             p_vout->render.i_aspect / FP_FACTOR );
1292         return;
1293     }
1294     else if( i_height > 0 )
1295     {
1296         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1297         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1298                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1299         return;
1300     }
1301
1302     if( p_vout->render.i_height * p_vout->render.i_aspect
1303         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1304     {
1305         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1306           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1307         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1308     }
1309     else
1310     {
1311         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1312         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1313           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1314     }
1315
1316 #undef FP_FACTOR
1317 }
1318
1319 /*****************************************************************************
1320  * vout_VarCallback: generic callback for intf variables
1321  *****************************************************************************/
1322 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1323                       vlc_value_t old_value, vlc_value_t new_value,
1324                       void * unused )
1325 {
1326     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1327     vlc_value_t val;
1328     val.b_bool = VLC_TRUE;
1329     var_Set( p_vout, "intf-change", val );
1330     return VLC_SUCCESS;
1331 }
1332
1333 /*****************************************************************************
1334  * object variables callbacks: a bunch of object variables are used by the
1335  * interfaces to interact with the vout.
1336  *****************************************************************************/
1337 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1338                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1339 {
1340     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1341     input_thread_t *p_input;
1342     vlc_value_t val;
1343
1344     char *psz_mode = newval.psz_string;
1345     char *psz_filter;
1346     unsigned int  i;
1347
1348     psz_filter = config_GetPsz( p_vout, "filter" );
1349
1350     if( !psz_mode || !*psz_mode )
1351     {
1352         config_PutPsz( p_vout, "filter", "" );
1353     }
1354     else
1355     {
1356         if( !psz_filter || !*psz_filter )
1357         {
1358             config_PutPsz( p_vout, "filter", "deinterlace" );
1359         }
1360         else
1361         {
1362             if( strstr( psz_filter, "deinterlace" ) == NULL )
1363             {
1364                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1365                 strcat( psz_filter, ",deinterlace" );
1366             }
1367             config_PutPsz( p_vout, "filter", psz_filter );
1368         }
1369     }
1370
1371     if( psz_filter ) free( psz_filter );
1372
1373
1374     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1375                                                  FIND_PARENT );
1376     if( !p_input ) return VLC_EGENERIC;
1377
1378     if( psz_mode && *psz_mode )
1379     {
1380         val.psz_string = psz_mode;
1381         var_Set( p_vout, "deinterlace-mode", val );
1382         /* Modify input as well because the vout might have to be restarted */
1383         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1384         var_Set( p_input, "deinterlace-mode", val );
1385     }
1386
1387     /* FIXME FIXME input2 --fenrir */
1388 #if 0
1389     /* now restart all video streams */
1390     vlc_mutex_lock( &p_input->stream.stream_lock );
1391
1392     p_vout->b_filter_change = VLC_TRUE;
1393
1394 #define ES p_input->stream.pp_es[i]
1395
1396     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1397     {
1398         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1399         {
1400             input_UnselectES( p_input, ES );
1401             input_SelectES( p_input, ES );
1402         }
1403 #undef ES
1404     }
1405     vlc_mutex_unlock( &p_input->stream.stream_lock );
1406
1407     vlc_object_release( p_input );
1408 #endif
1409
1410     val.b_bool = VLC_TRUE;
1411     var_Set( p_vout, "intf-change", val );
1412     return VLC_SUCCESS;
1413 }
1414
1415 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1416                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1417 {
1418     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1419     input_thread_t *p_input;
1420     vlc_value_t val;
1421     unsigned int i;
1422
1423     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1424                                                  FIND_PARENT );
1425
1426     if (!p_input)
1427     {
1428         msg_Err( p_vout, "Input not found" );
1429         return( VLC_EGENERIC );
1430     }
1431
1432     /* FIXME FIXME input2 --fenrir */
1433 #if 0
1434     /* Restart the video stream */
1435     vlc_mutex_lock( &p_input->stream.stream_lock );
1436
1437     p_vout->b_filter_change = VLC_TRUE;
1438
1439 #define ES p_input->stream.pp_es[i]
1440
1441     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1442     {
1443         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1444         {
1445             input_UnselectES( p_input, ES );
1446             input_SelectES( p_input, ES );
1447         }
1448 #undef ES
1449     }
1450     vlc_mutex_unlock( &p_input->stream.stream_lock );
1451
1452     vlc_object_release( p_input );
1453 #endif
1454
1455     val.b_bool = VLC_TRUE;
1456     var_Set( p_vout, "intf-change", val );
1457     return VLC_SUCCESS;
1458 }
1459