git.sesse.net Git - vlc/blob - src/video_output/video_output.c

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  * This module describes the programming interface for video output threads.
   4  * It includes functions allowing to open a new thread, send pictures to a
   5  * thread, and destroy a previously oppened video output thread.
   6  *****************************************************************************
   7  * Copyright (C) 2000-2004 VideoLAN
   8  * $Id$
   9  *
  10  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include <stdlib.h>                                                /* free() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #ifdef HAVE_SYS_TIMES_H
  35 #   include <sys/times.h>
  36 #endif
  37
  38 #include "vlc_video.h"
  39 #include "video_output.h"
  40 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  41
  42 #if defined( SYS_DARWIN )
  43 #include "darwin_specific.h"
  44 #endif
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int      InitThread        ( vout_thread_t * );
  50 static void     RunThread         ( vout_thread_t * );
  51 static void     ErrorThread       ( vout_thread_t * );
  52 static void     EndThread         ( vout_thread_t * );
  53 static void     DestroyThread     ( vout_thread_t * );
  54
  55 static int      ReduceHeight      ( int );
  56 static int      BinaryLog         ( uint32_t );
  57 static void     MaskToShift       ( int *, int *, uint32_t );
  58 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  59
  60 /* Object variables callbacks */
  61 static int DeinterlaceCallback( vlc_object_t *, char const *,
  62                                 vlc_value_t, vlc_value_t, void * );
  63 static int FilterCallback( vlc_object_t *, char const *,
  64                            vlc_value_t, vlc_value_t, void * );
  65
  66 /**
  67  * vout_AspectRatio
  68  *
  69  * Set the i_aspect_x and i_aspect_y from i_aspect.
  70  */
  71 void vout_AspectRatio( unsigned int i_aspect,
  72                        /*out*/ unsigned int *i_aspect_x,
  73                        /*out*/ unsigned int *i_aspect_y )
  74 {
  75   unsigned int i_pgcd = ReduceHeight( i_aspect );
  76   *i_aspect_x = i_aspect / i_pgcd;
  77   *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
  78 }
  79
  80 /*****************************************************************************
  81  * vout_Request: find a video output thread, create one, or destroy one.
  82  *****************************************************************************
  83  * This function looks for a video output thread matching the current
  84  * properties. If not found, it spawns a new one.
  85  *****************************************************************************/
  86 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  87                                  unsigned int i_width, unsigned int i_height,
  88                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  89 {
  90     if( !i_width || !i_height || !i_chroma )
  91     {
  92         /* Reattach video output to input before bailing out */
  93         if( p_vout )
  94         {
  95             vlc_object_t *p_playlist;
  96
  97             p_playlist = vlc_object_find( p_this,
  98                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
  99
 100             if( p_playlist )
 101             {
 102                 vlc_object_detach( p_vout );
 103                 vlc_object_attach( p_vout, p_playlist );
 104
 105                 vlc_object_release( p_playlist );
 106             }
 107             else
 108             {
 109                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 110                 vlc_object_detach( p_vout );
 111                 vout_Destroy( p_vout );
 112             }
 113         }
 114         return NULL;
 115     }
 116
 117     /* If a video output was provided, lock it, otherwise look for one. */
 118     if( p_vout )
 119     {
 120         vlc_object_yield( p_vout );
 121     }
 122     else
 123     {
 124         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 125
 126         if( !p_vout )
 127         {
 128             vlc_object_t *p_playlist;
 129
 130             p_playlist = vlc_object_find( p_this,
 131                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 132             if( p_playlist )
 133             {
 134                 p_vout = vlc_object_find( p_playlist,
 135                                           VLC_OBJECT_VOUT, FIND_CHILD );
 136                 /* only first children of p_input for unused vout */
 137                 if( p_vout && p_vout->p_parent != p_playlist )
 138                 {
 139                     vlc_object_release( p_vout );
 140                     p_vout = NULL;
 141                 }
 142                 vlc_object_release( p_playlist );
 143             }
 144         }
 145     }
 146
 147     /* If we now have a video output, check it has the right properties */
 148     if( p_vout )
 149     {
 150         char *psz_filter_chain;
 151
 152         /* We don't directly check for the "filter" variable for obvious
 153          * performance reasons. */
 154         if( p_vout->b_filter_change )
 155         {
 156             psz_filter_chain = config_GetPsz( p_this, "filter" );
 157
 158             if( psz_filter_chain && !*psz_filter_chain )
 159             {
 160                 free( psz_filter_chain );
 161                 psz_filter_chain = NULL;
 162             }
 163             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 164             {
 165                 free( p_vout->psz_filter_chain );
 166                 p_vout->psz_filter_chain = NULL;
 167             }
 168
 169             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 170                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 171                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 172             {
 173                 p_vout->b_filter_change = VLC_FALSE;
 174             }
 175
 176             if( psz_filter_chain ) free( psz_filter_chain );
 177         }
 178
 179         if( ( p_vout->render.i_width != i_width ) ||
 180             ( p_vout->render.i_height != i_height ) ||
 181             ( p_vout->render.i_chroma != i_chroma ) ||
 182             ( p_vout->render.i_aspect != i_aspect
 183                     && !p_vout->b_override_aspect ) ||
 184             p_vout->b_filter_change )
 185         {
 186             /* We are not interested in this format, close this vout */
 187             vlc_object_detach( p_vout );
 188             vlc_object_release( p_vout );
 189             vout_Destroy( p_vout );
 190             p_vout = NULL;
 191         }
 192         else
 193         {
 194             /* This video output is cool! Hijack it. */
 195             vlc_object_detach( p_vout );
 196             vlc_object_attach( p_vout, p_this );
 197             vlc_object_release( p_vout );
 198         }
 199     }
 200
 201     if( !p_vout )
 202     {
 203         msg_Dbg( p_this, "no usable vout present, spawning one" );
 204
 205         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 206     }
 207
 208     return p_vout;
 209 }
 210
 211 /*****************************************************************************
 212  * vout_Create: creates a new video output thread
 213  *****************************************************************************
 214  * This function creates a new video output thread, and returns a pointer
 215  * to its description. On error, it returns NULL.
 216  *****************************************************************************/
 217 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 218                                unsigned int i_width, unsigned int i_height,
 219                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 220 {
 221     vout_thread_t  * p_vout;                            /* thread descriptor */
 222     input_thread_t * p_input_thread;
 223     int              i_index;                               /* loop variable */
 224     char           * psz_plugin;
 225     vlc_value_t      val, text;
 226
 227     /* Allocate descriptor */
 228     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 229     if( p_vout == NULL )
 230     {
 231         msg_Err( p_parent, "out of memory" );
 232         return NULL;
 233     }
 234
 235     /* Initialize pictures - translation tables and functions
 236      * will be initialized later in InitThread */
 237     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 238     {
 239         p_vout->p_picture[i_index].pf_lock = NULL;
 240         p_vout->p_picture[i_index].pf_unlock = NULL;
 241         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 242         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 243         p_vout->p_picture[i_index].b_slow   = 0;
 244     }
 245
 246     /* No images in the heap */
 247     p_vout->i_heap_size = 0;
 248
 249     /* Register the default subpicture channel */
 250     p_vout->p_default_channel = NULL;
 251     p_vout->i_channel_count = 1;
 252
 253     /* Initialize the rendering heap */
 254     I_RENDERPICTURES = 0;
 255     p_vout->render.i_width    = i_width;
 256     p_vout->render.i_height   = i_height;
 257     p_vout->render.i_chroma   = i_chroma;
 258     p_vout->render.i_aspect   = i_aspect;
 259
 260     p_vout->render.i_rmask    = 0;
 261     p_vout->render.i_gmask    = 0;
 262     p_vout->render.i_bmask    = 0;
 263
 264     p_vout->render.i_last_used_pic = -1;
 265     p_vout->render.b_allow_modify_pics = 1;
 266
 267     /* Zero the output heap */
 268     I_OUTPUTPICTURES = 0;
 269     p_vout->output.i_width    = 0;
 270     p_vout->output.i_height   = 0;
 271     p_vout->output.i_chroma   = 0;
 272     p_vout->output.i_aspect   = 0;
 273
 274     p_vout->output.i_rmask    = 0;
 275     p_vout->output.i_gmask    = 0;
 276     p_vout->output.i_bmask    = 0;
 277
 278     /* Initialize misc stuff */
 279     p_vout->i_changes    = 0;
 280     p_vout->f_gamma      = 0;
 281     p_vout->b_grayscale  = 0;
 282     p_vout->b_info       = 0;
 283     p_vout->b_interface  = 0;
 284     p_vout->b_scale      = 1;
 285     p_vout->b_fullscreen = 0;
 286     p_vout->i_alignment  = 0;
 287     p_vout->render_time  = 10;
 288     p_vout->c_fps_samples = 0;
 289     p_vout->b_filter_change = 0;
 290     p_vout->pf_control = 0;
 291     p_vout->p_parent_intf = 0;
 292
 293     /* Mouse coordinates */
 294     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 295     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 296     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 297     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 298     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 299
 300     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 301     val.b_bool = VLC_TRUE;
 302     var_Set( p_vout, "intf-change", val );
 303
 304     /* Initialize locks */
 305     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 306     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 307     vlc_mutex_init( p_vout, &p_vout->change_lock );
 308
 309     /* Attach the new object now so we can use var inheritance below */
 310     vlc_object_attach( p_vout, p_parent );
 311
 312     /* Take care of some "interface/control" related initialisations */
 313     vout_IntfInit( p_vout );
 314
 315     p_vout->b_override_aspect = VLC_FALSE;
 316
 317     /* If the parent is not a VOUT object, that means we are at the start of
 318      * the video output pipe */
 319     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 320     {
 321         var_Get( p_vout, "aspect-ratio", &val );
 322
 323         /* Check whether the user tried to override aspect ratio */
 324         if( val.psz_string )
 325         {
 326             unsigned int i_new_aspect = i_aspect;
 327             char *psz_parser = strchr( val.psz_string, ':' );
 328
 329             if( psz_parser )
 330             {
 331                 *psz_parser++ = '\0';
 332                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 333                                                       / atoi( psz_parser );
 334             }
 335             else
 336             {
 337                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 338                                        * atof( val.psz_string )
 339                                        / i_height;
 340             }
 341
 342             free( val.psz_string );
 343
 344             if( i_new_aspect && i_new_aspect != i_aspect )
 345             {
 346                 unsigned int i_aspect_x, i_aspect_y;
 347
 348                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 349
 350                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 351                          i_aspect_x, i_aspect_y );
 352
 353                 p_vout->render.i_aspect = i_new_aspect;
 354
 355                 p_vout->b_override_aspect = VLC_TRUE;
 356             }
 357         }
 358
 359         /* Look for the default filter configuration */
 360         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 361         var_Get( p_vout, "filter", &val );
 362         p_vout->psz_filter_chain = val.psz_string;
 363     }
 364     else
 365     {
 366         /* continue the parent's filter chain */
 367         char *psz_end;
 368
 369         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 370         if( psz_end && *(psz_end+1) )
 371             p_vout->psz_filter_chain = strdup( psz_end+1 );
 372         else p_vout->psz_filter_chain = NULL;
 373     }
 374
 375     /* Choose the video output module */
 376     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 377     {
 378         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 379         var_Get( p_vout, "vout", &val );
 380         psz_plugin = val.psz_string;
 381     }
 382     else
 383     {
 384         /* the filter chain is a string list of filters separated by double
 385          * colons */
 386         char *psz_end;
 387
 388         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 389         if( psz_end )
 390             psz_plugin = strndup( p_vout->psz_filter_chain,
 391                                   psz_end - p_vout->psz_filter_chain );
 392         else psz_plugin = strdup( p_vout->psz_filter_chain );
 393     }
 394
 395     /* Initialize the dimensions of the video window */
 396     InitWindowSize( p_vout, &p_vout->i_window_width,
 397                     &p_vout->i_window_height );
 398
 399     /* Create the vout thread */
 400     p_vout->p_module = module_Need( p_vout,
 401         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 402         "video filter" : "video output", psz_plugin, 0 );
 403
 404     if( psz_plugin ) free( psz_plugin );
 405     if( p_vout->p_module == NULL )
 406     {
 407         msg_Err( p_vout, "no suitable vout module" );
 408         vlc_object_detach( p_vout );
 409         vlc_object_destroy( p_vout );
 410         return NULL;
 411     }
 412
 413     /* Initialize subpicture unit */
 414     vout_InitSPU( p_vout );
 415
 416     /* Create a few object variables for interface interaction */
 417     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 418     text.psz_string = _("Deinterlace");
 419     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 420     val.psz_string = ""; text.psz_string = _("Disable");
 421     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 422     val.psz_string = "discard"; text.psz_string = _("Discard");
 423     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 424     val.psz_string = "blend"; text.psz_string = _("Blend");
 425     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 426     val.psz_string = "mean"; text.psz_string = _("Mean");
 427     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 428     val.psz_string = "bob"; text.psz_string = _("Bob");
 429     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 430     val.psz_string = "linear"; text.psz_string = _("Linear");
 431     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 432     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 433     {
 434         var_Set( p_vout, "deinterlace", val );
 435         if( val.psz_string ) free( val.psz_string );
 436     }
 437     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 438
 439
 440     var_Create( p_vout, "filter", VLC_VAR_STRING );
 441     text.psz_string = _("Filters");
 442     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 443     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 444     if( val.psz_string )
 445     {
 446         var_Set( p_vout, "filter", val );
 447         free( val.psz_string );
 448     }
 449     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 450
 451     /* Calculate delay created by internal caching */
 452     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 453                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 454     if( p_input_thread )
 455     {
 456         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 457         vlc_object_release( p_input_thread );
 458     }
 459     else
 460     {
 461         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 462     }
 463
 464     if( vlc_thread_create( p_vout, "video output", RunThread,
 465                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 466     {
 467         msg_Err( p_vout, "out of memory" );
 468         module_Unneed( p_vout, p_vout->p_module );
 469         vlc_object_detach( p_vout );
 470         vlc_object_destroy( p_vout );
 471         return NULL;
 472     }
 473
 474     if( p_vout->b_error )
 475     {
 476         msg_Err( p_vout, "video output creation failed" );
 477
 478         /* Make sure the thread is destroyed */
 479         p_vout->b_die = VLC_TRUE;
 480
 481         vlc_thread_join( p_vout );
 482
 483         vlc_object_detach( p_vout );
 484         vlc_object_destroy( p_vout );
 485         return NULL;
 486     }
 487
 488     return p_vout;
 489 }
 490
 491 /*****************************************************************************
 492  * vout_Destroy: destroys a previously created video output
 493  *****************************************************************************
 494  * Destroy a terminated thread.
 495  * The function will request a destruction of the specified thread. If pi_error
 496  * is NULL, it will return once the thread is destroyed. Else, it will be
 497  * update using one of the THREAD_* constants.
 498  *****************************************************************************/
 499 void vout_Destroy( vout_thread_t *p_vout )
 500 {
 501     vlc_object_t *p_playlist;
 502
 503     /* Request thread destruction */
 504     p_vout->b_die = VLC_TRUE;
 505     vlc_thread_join( p_vout );
 506
 507     var_Destroy( p_vout, "intf-change" );
 508
 509     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 510                                   FIND_ANYWHERE );
 511
 512     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 513
 514     /* Free structure */
 515     vlc_object_destroy( p_vout );
 516
 517     /* If it was the last vout, tell the interface to show up */
 518     if( p_playlist != NULL )
 519     {
 520         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 521                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 522         if( p_another_vout == NULL )
 523         {
 524             vlc_value_t val;
 525             val.b_bool = VLC_TRUE;
 526             var_Set( p_playlist, "intf-show", val );
 527         }
 528         else
 529         {
 530             vlc_object_release( p_another_vout );
 531         }
 532         vlc_object_release( p_playlist );
 533     }
 534 }
 535
 536 /*****************************************************************************
 537  * InitThread: initialize video output thread
 538  *****************************************************************************
 539  * This function is called from RunThread and performs the second step of the
 540  * initialization. It returns 0 on success. Note that the thread's flag are not
 541  * modified inside this function.
 542  *****************************************************************************/
 543 static int InitThread( vout_thread_t *p_vout )
 544 {
 545     int i;
 546     unsigned int i_aspect_x, i_aspect_y;
 547
 548     vlc_mutex_lock( &p_vout->change_lock );
 549
 550 #ifdef STATS
 551     p_vout->c_loops = 0;
 552 #endif
 553
 554     /* Initialize output method, it allocates direct buffers for us */
 555     if( p_vout->pf_init( p_vout ) )
 556     {
 557         vlc_mutex_unlock( &p_vout->change_lock );
 558         return VLC_EGENERIC;
 559     }
 560
 561     if( !I_OUTPUTPICTURES )
 562     {
 563         msg_Err( p_vout, "plugin was unable to allocate at least "
 564                          "one direct buffer" );
 565         p_vout->pf_end( p_vout );
 566         vlc_mutex_unlock( &p_vout->change_lock );
 567         return VLC_EGENERIC;
 568     }
 569
 570     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 571     {
 572         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 573                          "our internal buffers must have overflown." );
 574         p_vout->pf_end( p_vout );
 575         vlc_mutex_unlock( &p_vout->change_lock );
 576         return VLC_EGENERIC;
 577     }
 578
 579     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 580
 581 #if 0
 582     if( !p_vout->psz_filter_chain )
 583     {
 584         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 585
 586         if( psz_aspect )
 587         {
 588             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 589                                                       * atof( psz_aspect )
 590                                                       / p_vout->output.i_height;
 591             free( psz_aspect );
 592
 593             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 594             {
 595                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 596
 597                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 598                          i_aspect_x, i_aspect_y );
 599                 p_vout->output.i_aspect = i_new_aspect;
 600             }
 601         }
 602     }
 603 #endif
 604
 605     vout_AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 606     msg_Dbg( p_vout,
 607              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 608              p_vout->render.i_width, p_vout->render.i_height,
 609              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 610              i_aspect_x, i_aspect_y );
 611
 612     vout_AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 613     msg_Dbg( p_vout,
 614              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 615              p_vout->output.i_width, p_vout->output.i_height,
 616              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 617              i_aspect_x, i_aspect_y );
 618
 619     /* Calculate shifts from system-updated masks */
 620     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 621                  p_vout->output.i_rmask );
 622     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 623                  p_vout->output.i_gmask );
 624     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 625                  p_vout->output.i_bmask );
 626
 627     /* Check whether we managed to create direct buffers similar to
 628      * the render buffers, ie same size and chroma */
 629     if( ( p_vout->output.i_width == p_vout->render.i_width )
 630      && ( p_vout->output.i_height == p_vout->render.i_height )
 631      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 632     {
 633         /* Cool ! We have direct buffers, we can ask the decoder to
 634          * directly decode into them ! Map the first render buffers to
 635          * the first direct buffers, but keep the first direct buffer
 636          * for memcpy operations */
 637         p_vout->b_direct = 1;
 638
 639         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 640         {
 641             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 642                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 643                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 644             {
 645                 /* We have enough direct buffers so there's no need to
 646                  * try to use system memory buffers. */
 647                 break;
 648             }
 649             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 650             I_RENDERPICTURES++;
 651         }
 652
 653         msg_Dbg( p_vout, "direct render, mapping "
 654                  "render pictures 0-%i to system pictures 1-%i",
 655                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 656     }
 657     else
 658     {
 659         /* Rats... Something is wrong here, we could not find an output
 660          * plugin able to directly render what we decode. See if we can
 661          * find a chroma plugin to do the conversion */
 662         p_vout->b_direct = 0;
 663
 664         /* Choose the best module */
 665         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 666
 667         if( p_vout->chroma.p_module == NULL )
 668         {
 669             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 670                      (char*)&p_vout->render.i_chroma,
 671                      (char*)&p_vout->output.i_chroma );
 672             p_vout->pf_end( p_vout );
 673             vlc_mutex_unlock( &p_vout->change_lock );
 674             return VLC_EGENERIC;
 675         }
 676
 677         msg_Dbg( p_vout, "indirect render, mapping "
 678                  "render pictures 0-%i to system pictures %i-%i",
 679                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 680                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 681
 682         /* Append render buffers after the direct buffers */
 683         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 684         {
 685             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 686             I_RENDERPICTURES++;
 687
 688             /* Check if we have enough render pictures */
 689             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 690                 break;
 691         }
 692     }
 693
 694     /* Link pictures back to their heap */
 695     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 696     {
 697         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 698     }
 699
 700     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 701     {
 702         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 703     }
 704
 705 /* XXX XXX mark thread ready */
 706     return VLC_SUCCESS;
 707 }
 708
 709 /*****************************************************************************
 710  * RunThread: video output thread
 711  *****************************************************************************
 712  * Video output thread. This function does only returns when the thread is
 713  * terminated. It handles the pictures arriving in the video heap and the
 714  * display device events.
 715  *****************************************************************************/
 716 static void RunThread( vout_thread_t *p_vout)
 717 {
 718     int             i_index;                                /* index in heap */
 719     int             i_idle_loops = 0;  /* loops without displaying a picture */
 720     mtime_t         current_date;                            /* current date */
 721     mtime_t         display_date;                            /* display date */
 722
 723     picture_t *     p_picture;                            /* picture pointer */
 724     picture_t *     p_last_picture = NULL;                   /* last picture */
 725     picture_t *     p_directbuffer;              /* direct buffer to display */
 726
 727     subpicture_t *  p_subpic;                          /* subpicture pointer */
 728
 729     /*
 730      * Initialize thread
 731      */
 732     p_vout->b_error = InitThread( p_vout );
 733
 734     /* signal the creation of the vout */
 735     vlc_thread_ready( p_vout );
 736
 737     if( p_vout->b_error )
 738     {
 739         /* Destroy thread structures allocated by Create and InitThread */
 740         DestroyThread( p_vout );
 741         return;
 742     }
 743
 744     /*
 745      * Main loop - it is not executed if an error occured during
 746      * initialization
 747      */
 748     while( (!p_vout->b_die) && (!p_vout->b_error) )
 749     {
 750         /* Initialize loop variables */
 751         p_picture = NULL;
 752         display_date = 0;
 753         current_date = mdate();
 754
 755 #if 0
 756         p_vout->c_loops++;
 757         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 758         {
 759             msg_Dbg( p_vout, "picture heap: %d/%d",
 760                      I_RENDERPICTURES, p_vout->i_heap_size );
 761         }
 762 #endif
 763
 764         /*
 765          * Find the picture to display (the one with the earliest date).
 766          * This operation does not need lock, since only READY_PICTUREs
 767          * are handled. */
 768         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 769         {
 770             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 771                 && ( (p_picture == NULL) ||
 772                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 773             {
 774                 p_picture = PP_RENDERPICTURE[i_index];
 775                 display_date = p_picture->date;
 776             }
 777         }
 778
 779         if( p_picture )
 780         {
 781             /* If we met the last picture, parse again to see whether there is
 782              * a more appropriate one. */
 783             if( p_picture == p_last_picture )
 784             {
 785                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 786                 {
 787                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 788                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 789                         && ((p_picture == p_last_picture) ||
 790                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 791                     {
 792                         p_picture = PP_RENDERPICTURE[i_index];
 793                         display_date = p_picture->date;
 794                     }
 795                 }
 796             }
 797
 798             /* If we found better than the last picture, destroy it */
 799             if( p_last_picture && p_picture != p_last_picture )
 800             {
 801                 vlc_mutex_lock( &p_vout->picture_lock );
 802                 if( p_last_picture->i_refcount )
 803                 {
 804                     p_last_picture->i_status = DISPLAYED_PICTURE;
 805                 }
 806                 else
 807                 {
 808                     p_last_picture->i_status = DESTROYED_PICTURE;
 809                     p_vout->i_heap_size--;
 810                 }
 811                 vlc_mutex_unlock( &p_vout->picture_lock );
 812                 p_last_picture = NULL;
 813             }
 814
 815             /* Compute FPS rate */
 816             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 817                 = display_date;
 818
 819             if( !p_picture->b_force &&
 820                 p_picture != p_last_picture &&
 821                 display_date < current_date + p_vout->render_time )
 822             {
 823                 /* Picture is late: it will be destroyed and the thread
 824                  * will directly choose the next picture */
 825                 vlc_mutex_lock( &p_vout->picture_lock );
 826                 if( p_picture->i_refcount )
 827                 {
 828                     /* Pretend we displayed the picture, but don't destroy
 829                      * it since the decoder might still need it. */
 830                     p_picture->i_status = DISPLAYED_PICTURE;
 831                 }
 832                 else
 833                 {
 834                     /* Destroy the picture without displaying it */
 835                     p_picture->i_status = DESTROYED_PICTURE;
 836                     p_vout->i_heap_size--;
 837                 }
 838                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 839                                   current_date - display_date );
 840                 vlc_mutex_unlock( &p_vout->picture_lock );
 841
 842                 continue;
 843             }
 844
 845             if( display_date >
 846                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 847             {
 848                 /* Picture is waaay too early: it will be destroyed */
 849                 vlc_mutex_lock( &p_vout->picture_lock );
 850                 if( p_picture->i_refcount )
 851                 {
 852                     /* Pretend we displayed the picture, but don't destroy
 853                      * it since the decoder might still need it. */
 854                     p_picture->i_status = DISPLAYED_PICTURE;
 855                 }
 856                 else
 857                 {
 858                     /* Destroy the picture without displaying it */
 859                     p_picture->i_status = DESTROYED_PICTURE;
 860                     p_vout->i_heap_size--;
 861                 }
 862                 msg_Warn( p_vout, "vout warning: early picture skipped "
 863                           "("I64Fd")", display_date - current_date
 864                           - p_vout->i_pts_delay );
 865                 vlc_mutex_unlock( &p_vout->picture_lock );
 866
 867                 continue;
 868             }
 869
 870             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 871             {
 872                 /* A picture is ready to be rendered, but its rendering date
 873                  * is far from the current one so the thread will perform an
 874                  * empty loop as if no picture were found. The picture state
 875                  * is unchanged */
 876                 p_picture    = NULL;
 877                 display_date = 0;
 878             }
 879             else if( p_picture == p_last_picture )
 880             {
 881                 /* We are asked to repeat the previous picture, but we first
 882                  * wait for a couple of idle loops */
 883                 if( i_idle_loops < 4 )
 884                 {
 885                     p_picture    = NULL;
 886                     display_date = 0;
 887                 }
 888                 else
 889                 {
 890                     /* We set the display date to something high, otherwise
 891                      * we'll have lots of problems with late pictures */
 892                     display_date = current_date + p_vout->render_time;
 893                 }
 894             }
 895         }
 896
 897         if( p_picture == NULL )
 898         {
 899             i_idle_loops++;
 900         }
 901
 902         /*
 903          * Check for subpictures to display
 904          */
 905         p_subpic = vout_SortSubPictures( p_vout, display_date );
 906
 907         /*
 908          * Perform rendering
 909          */
 910         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 911
 912         /*
 913          * Call the plugin-specific rendering method if there is one
 914          */
 915         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 916         {
 917             /* Render the direct buffer returned by vout_RenderPicture */
 918             p_vout->pf_render( p_vout, p_directbuffer );
 919         }
 920
 921         /*
 922          * Sleep, wake up
 923          */
 924         if( display_date != 0 && p_directbuffer != NULL )
 925         {
 926             mtime_t current_render_time = mdate() - current_date;
 927             /* if render time is very large we don't include it in the mean */
 928             if( current_render_time < p_vout->render_time +
 929                 VOUT_DISPLAY_DELAY )
 930             {
 931                 /* Store render time using a sliding mean weighting to
 932                  * current value in a 3 to 1 ratio*/
 933                 p_vout->render_time *= 3;
 934                 p_vout->render_time += current_render_time;
 935                 p_vout->render_time >>= 2;
 936             }
 937         }
 938
 939         /* Give back change lock */
 940         vlc_mutex_unlock( &p_vout->change_lock );
 941
 942         /* Sleep a while or until a given date */
 943         if( display_date != 0 )
 944         {
 945             /* If there are filters in the chain, better give them the picture
 946              * in advance */
 947             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 948             {
 949                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 950             }
 951         }
 952         else
 953         {
 954             msleep( VOUT_IDLE_SLEEP );
 955         }
 956
 957         /* On awakening, take back lock and send immediately picture
 958          * to display. */
 959         vlc_mutex_lock( &p_vout->change_lock );
 960
 961         /*
 962          * Display the previously rendered picture
 963          */
 964         if( p_picture != NULL && p_directbuffer != NULL )
 965         {
 966             /* Display the direct buffer returned by vout_RenderPicture */
 967             if( p_vout->pf_display )
 968             {
 969                 p_vout->pf_display( p_vout, p_directbuffer );
 970             }
 971
 972             /* Reinitialize idle loop count */
 973             i_idle_loops = 0;
 974
 975             /* Tell the vout this was the last picture and that it does not
 976              * need to be forced anymore. */
 977             p_last_picture = p_picture;
 978             p_last_picture->b_force = 0;
 979         }
 980
 981         /*
 982          * Check events and manage thread
 983          */
 984         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 985         {
 986             /* A fatal error occured, and the thread must terminate
 987              * immediately, without displaying anything - setting b_error to 1
 988              * causes the immediate end of the main while() loop. */
 989             p_vout->b_error = 1;
 990         }
 991
 992         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 993         {
 994             /* this must only happen when the vout plugin is incapable of
 995              * rescaling the picture itself. In this case we need to destroy
 996              * the current picture buffers and recreate new ones with the right
 997              * dimensions */
 998             int i;
 999
1000             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1001
1002             p_vout->pf_end( p_vout );
1003             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1004                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1005
1006             I_OUTPUTPICTURES = 0;
1007             if( p_vout->pf_init( p_vout ) )
1008             {
1009                 msg_Err( p_vout, "cannot resize display" );
1010                 /* FIXME: pf_end will be called again in EndThread() */
1011                 p_vout->b_error = 1;
1012             }
1013
1014             /* Need to reinitialise the chroma plugin */
1015             if( p_vout->chroma.p_module )
1016             {
1017                 if( p_vout->chroma.p_module->pf_deactivate )
1018                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1019                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1020             }
1021         }
1022
1023         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1024         {
1025             /* This happens when the picture buffers need to be recreated.
1026              * This is useful on multimonitor displays for instance.
1027              *
1028              * Warning: This only works when the vout creates only 1 picture
1029              * buffer!! */
1030             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1031
1032             if( !p_vout->b_direct )
1033             {
1034                 module_Unneed( p_vout, p_vout->chroma.p_module );
1035             }
1036
1037             vlc_mutex_lock( &p_vout->picture_lock );
1038
1039             p_vout->pf_end( p_vout );
1040
1041             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1042
1043             p_vout->b_error = InitThread( p_vout );
1044
1045             vlc_mutex_unlock( &p_vout->picture_lock );
1046         }
1047     }
1048
1049     /*
1050      * Error loop - wait until the thread destruction is requested
1051      */
1052     if( p_vout->b_error )
1053     {
1054         ErrorThread( p_vout );
1055     }
1056
1057     /* End of thread */
1058     EndThread( p_vout );
1059
1060     /* Destroy thread structures allocated by CreateThread */
1061     DestroyThread( p_vout );
1062 }
1063
1064 /*****************************************************************************
1065  * ErrorThread: RunThread() error loop
1066  *****************************************************************************
1067  * This function is called when an error occured during thread main's loop. The
1068  * thread can still receive feed, but must be ready to terminate as soon as
1069  * possible.
1070  *****************************************************************************/
1071 static void ErrorThread( vout_thread_t *p_vout )
1072 {
1073     /* Wait until a `die' order */
1074     while( !p_vout->b_die )
1075     {
1076         /* Sleep a while */
1077         msleep( VOUT_IDLE_SLEEP );
1078     }
1079 }
1080
1081 /*****************************************************************************
1082  * EndThread: thread destruction
1083  *****************************************************************************
1084  * This function is called when the thread ends after a sucessful
1085  * initialization. It frees all resources allocated by InitThread.
1086  *****************************************************************************/
1087 static void EndThread( vout_thread_t *p_vout )
1088 {
1089     int     i_index;                                        /* index in heap */
1090
1091 #ifdef STATS
1092     {
1093         struct tms cpu_usage;
1094         times( &cpu_usage );
1095
1096         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1097                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1098     }
1099 #endif
1100
1101     if( !p_vout->b_direct )
1102     {
1103         module_Unneed( p_vout, p_vout->chroma.p_module );
1104     }
1105
1106     /* Destroy all remaining pictures */
1107     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1108     {
1109         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1110         {
1111             free( p_vout->p_picture[i_index].p_data_orig );
1112         }
1113     }
1114
1115     /* Destroy subpicture unit */
1116     vout_DestroySPU( p_vout );
1117
1118     /* Destroy translation tables */
1119     p_vout->pf_end( p_vout );
1120
1121     /* Release the change lock */
1122     vlc_mutex_unlock( &p_vout->change_lock );
1123 }
1124
1125 /*****************************************************************************
1126  * DestroyThread: thread destruction
1127  *****************************************************************************
1128  * This function is called when the thread ends. It frees all ressources
1129  * allocated by CreateThread. Status is available at this stage.
1130  *****************************************************************************/
1131 static void DestroyThread( vout_thread_t *p_vout )
1132 {
1133     /* Destroy the locks */
1134     vlc_mutex_destroy( &p_vout->picture_lock );
1135     vlc_mutex_destroy( &p_vout->subpicture_lock );
1136     vlc_mutex_destroy( &p_vout->change_lock );
1137
1138     /* Release the module */
1139     if( p_vout && p_vout->p_module )
1140     {
1141         module_Unneed( p_vout, p_vout->p_module );
1142     }
1143 }
1144
1145 /* following functions are local */
1146
1147 static int ReduceHeight( int i_ratio )
1148 {
1149     int i_dummy = VOUT_ASPECT_FACTOR;
1150     int i_pgcd  = 1;
1151
1152     if( !i_ratio )
1153     {
1154         return i_pgcd;
1155     }
1156
1157     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1158     while( !(i_ratio & 1) && !(i_dummy & 1) )
1159     {
1160         i_ratio >>= 1;
1161         i_dummy >>= 1;
1162         i_pgcd  <<= 1;
1163     }
1164
1165     while( !(i_ratio % 3) && !(i_dummy % 3) )
1166     {
1167         i_ratio /= 3;
1168         i_dummy /= 3;
1169         i_pgcd  *= 3;
1170     }
1171
1172     while( !(i_ratio % 5) && !(i_dummy % 5) )
1173     {
1174         i_ratio /= 5;
1175         i_dummy /= 5;
1176         i_pgcd  *= 5;
1177     }
1178
1179     return i_pgcd;
1180 }
1181
1182 /*****************************************************************************
1183  * BinaryLog: computes the base 2 log of a binary value
1184  *****************************************************************************
1185  * This functions is used by MaskToShift, to get a bit index from a binary
1186  * value.
1187  *****************************************************************************/
1188 static int BinaryLog( uint32_t i )
1189 {
1190     int i_log = 0;
1191
1192     if( i == 0 ) return -31337;
1193
1194     if( i & 0xffff0000 ) i_log += 16;
1195     if( i & 0xff00ff00 ) i_log += 8;
1196     if( i & 0xf0f0f0f0 ) i_log += 4;
1197     if( i & 0xcccccccc ) i_log += 2;
1198     if( i & 0xaaaaaaaa ) i_log += 1;
1199
1200     return i_log;
1201 }
1202
1203 /*****************************************************************************
1204  * MaskToShift: transform a color mask into right and left shifts
1205  *****************************************************************************
1206  * This function is used for obtaining color shifts from masks.
1207  *****************************************************************************/
1208 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1209 {
1210     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1211
1212     if( !i_mask )
1213     {
1214         *pi_left = *pi_right = 0;
1215         return;
1216     }
1217
1218     /* Get bits */
1219     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1220     i_high = i_mask + i_low;                       /* higher bit of the mask */
1221
1222     /* Transform bits into an index */
1223     i_low =  BinaryLog (i_low);
1224     i_high = BinaryLog (i_high);
1225
1226     /* Update pointers and return */
1227     *pi_left =   i_low;
1228     *pi_right = (8 - i_high + i_low);
1229 }
1230
1231 /*****************************************************************************
1232  * InitWindowSize: find the initial dimensions the video window should have.
1233  *****************************************************************************
1234  * This function will check the "width", "height" and "zoom" config options and
1235  * will calculate the size that the video window should have.
1236  *****************************************************************************/
1237 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1238                             int *pi_height )
1239 {
1240     vlc_value_t val;
1241     int i_width, i_height;
1242     uint64_t ll_zoom;
1243
1244 #define FP_FACTOR 1000                             /* our fixed point factor */
1245
1246     var_Get( p_vout, "align", &val );
1247     p_vout->i_alignment = val.i_int;
1248
1249     var_Get( p_vout, "width", &val );
1250     i_width = val.i_int;
1251     var_Get( p_vout, "height", &val );
1252     i_height = val.i_int;
1253     var_Get( p_vout, "zoom", &val );
1254     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1255
1256     if( i_width > 0 && i_height > 0)
1257     {
1258         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1259         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1260         return;
1261     }
1262     else if( i_width > 0 )
1263     {
1264         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1265         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1266                             p_vout->render.i_aspect / FP_FACTOR );
1267         return;
1268     }
1269     else if( i_height > 0 )
1270     {
1271         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1272         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1273                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1274         return;
1275     }
1276
1277     if( p_vout->render.i_height * p_vout->render.i_aspect
1278         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1279     {
1280         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1281           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1282         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1283     }
1284     else
1285     {
1286         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1287         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1288           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1289     }
1290
1291 #undef FP_FACTOR
1292 }
1293
1294 /*****************************************************************************
1295  * vout_VarCallback: generic callback for intf variables
1296  *****************************************************************************/
1297 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1298                       vlc_value_t old_value, vlc_value_t new_value,
1299                       void * unused )
1300 {
1301     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1302     vlc_value_t val;
1303     val.b_bool = VLC_TRUE;
1304     var_Set( p_vout, "intf-change", val );
1305     return VLC_SUCCESS;
1306 }
1307
1308 /*****************************************************************************
1309  * object variables callbacks: a bunch of object variables are used by the
1310  * interfaces to interact with the vout.
1311  *****************************************************************************/
1312 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1313                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1314 {
1315     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1316     input_thread_t *p_input;
1317     vlc_value_t val;
1318
1319     char *psz_mode = newval.psz_string;
1320     char *psz_filter;
1321     unsigned int  i;
1322
1323     psz_filter = config_GetPsz( p_vout, "filter" );
1324
1325     if( !psz_mode || !*psz_mode )
1326     {
1327         config_PutPsz( p_vout, "filter", "" );
1328     }
1329     else
1330     {
1331         if( !psz_filter || !*psz_filter )
1332         {
1333             config_PutPsz( p_vout, "filter", "deinterlace" );
1334         }
1335         else
1336         {
1337             if( strstr( psz_filter, "deinterlace" ) == NULL )
1338             {
1339                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1340                 strcat( psz_filter, ",deinterlace" );
1341             }
1342             config_PutPsz( p_vout, "filter", psz_filter );
1343         }
1344     }
1345
1346     if( psz_filter ) free( psz_filter );
1347
1348
1349     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1350                                                  FIND_PARENT );
1351     if( !p_input ) return VLC_EGENERIC;
1352
1353     if( psz_mode && *psz_mode )
1354     {
1355         val.psz_string = psz_mode;
1356         var_Set( p_vout, "deinterlace-mode", val );
1357         /* Modify input as well because the vout might have to be restarted */
1358         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1359         var_Set( p_input, "deinterlace-mode", val );
1360     }
1361
1362     /* FIXME FIXME input2 --fenrir */
1363 #if 0
1364     /* now restart all video streams */
1365     vlc_mutex_lock( &p_input->stream.stream_lock );
1366
1367     p_vout->b_filter_change = VLC_TRUE;
1368
1369 #define ES p_input->stream.pp_es[i]
1370
1371     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1372     {
1373         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1374         {
1375             input_UnselectES( p_input, ES );
1376             input_SelectES( p_input, ES );
1377         }
1378 #undef ES
1379     }
1380     vlc_mutex_unlock( &p_input->stream.stream_lock );
1381
1382     vlc_object_release( p_input );
1383 #endif
1384
1385     val.b_bool = VLC_TRUE;
1386     var_Set( p_vout, "intf-change", val );
1387     return VLC_SUCCESS;
1388 }
1389
1390 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1391                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1392 {
1393     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1394     input_thread_t *p_input;
1395     vlc_value_t val;
1396     unsigned int i;
1397
1398     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1399                                                  FIND_PARENT );
1400
1401     if (!p_input)
1402     {
1403         msg_Err( p_vout, "Input not found" );
1404         return( VLC_EGENERIC );
1405     }
1406
1407     /* FIXME FIXME input2 --fenrir */
1408 #if 0
1409     /* Restart the video stream */
1410     vlc_mutex_lock( &p_input->stream.stream_lock );
1411
1412     p_vout->b_filter_change = VLC_TRUE;
1413
1414 #define ES p_input->stream.pp_es[i]
1415
1416     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1417     {
1418         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1419         {
1420             input_UnselectES( p_input, ES );
1421             input_SelectES( p_input, ES );
1422         }
1423 #undef ES
1424     }
1425     vlc_mutex_unlock( &p_input->stream.stream_lock );
1426
1427     vlc_object_release( p_input );
1428 #endif
1429
1430     val.b_bool = VLC_TRUE;
1431     var_Set( p_vout, "intf-change", val );
1432     return VLC_SUCCESS;
1433 }
1434