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: video_output.c,v 1.244 2004/01/10 13:59:25 rocky Exp $
   9  *
  10  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include <stdlib.h>                                                /* free() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #ifdef HAVE_SYS_TIMES_H
  35 #   include <sys/times.h>
  36 #endif
  37
  38 #include "vlc_video.h"
  39 #include "video_output.h"
  40 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  41
  42 #if defined( SYS_DARWIN )
  43 #include "darwin_specific.h"
  44 #endif
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int      InitThread        ( vout_thread_t * );
  50 static void     RunThread         ( vout_thread_t * );
  51 static void     ErrorThread       ( vout_thread_t * );
  52 static void     EndThread         ( vout_thread_t * );
  53 static void     DestroyThread     ( vout_thread_t * );
  54
  55 static int      ReduceHeight      ( int );
  56 static int      BinaryLog         ( uint32_t );
  57 static void     MaskToShift       ( int *, int *, uint32_t );
  58 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  59
  60 /* Object variables callbacks */
  61 static int FullscreenCallback( vlc_object_t *, char const *,
  62                                vlc_value_t, vlc_value_t, void * );
  63 static int DeinterlaceCallback( vlc_object_t *, char const *,
  64                                 vlc_value_t, vlc_value_t, void * );
  65 static int FilterCallback( vlc_object_t *, char const *,
  66                            vlc_value_t, vlc_value_t, void * );
  67
  68 /**
  69  * vout_AspectRatio
  70  *
  71  * Set the i_aspect_x and i_aspect_y from i_aspect.
  72  */
  73 void vout_AspectRatio( unsigned int i_aspect,
  74                        /*out*/ unsigned int *i_aspect_x,
  75                        /*out*/ unsigned int *i_aspect_y )
  76 {
  77   unsigned int i_pgcd = ReduceHeight( i_aspect );
  78   *i_aspect_x = i_aspect / i_pgcd;
  79   *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
  80 }
  81
  82 /*****************************************************************************
  83  * vout_Request: find a video output thread, create one, or destroy one.
  84  *****************************************************************************
  85  * This function looks for a video output thread matching the current
  86  * properties. If not found, it spawns a new one.
  87  *****************************************************************************/
  88 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  89                                  unsigned int i_width, unsigned int i_height,
  90                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  91 {
  92     if( !i_width || !i_height || !i_chroma )
  93     {
  94         /* Reattach video output to input before bailing out */
  95         if( p_vout )
  96         {
  97             vlc_object_t *p_playlist;
  98
  99             p_playlist = vlc_object_find( p_this,
 100                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 101
 102             if( p_playlist )
 103             {
 104                 vlc_object_detach( p_vout );
 105                 vlc_object_attach( p_vout, p_playlist );
 106
 107                 vlc_object_release( p_playlist );
 108             }
 109             else
 110             {
 111                 msg_Dbg( p_this, "cannot find playlist destroying vout" );
 112                 vlc_object_detach( p_vout );
 113                 vout_Destroy( p_vout );
 114             }
 115         }
 116         return NULL;
 117     }
 118
 119     /* If a video output was provided, lock it, otherwise look for one. */
 120     if( p_vout )
 121     {
 122         vlc_object_yield( p_vout );
 123     }
 124     else
 125     {
 126         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 127
 128         if( !p_vout )
 129         {
 130             vlc_object_t *p_playlist;
 131
 132             p_playlist = vlc_object_find( p_this,
 133                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 134             if( p_playlist )
 135             {
 136                 p_vout = vlc_object_find( p_playlist,
 137                                           VLC_OBJECT_VOUT, FIND_CHILD );
 138                 /* only first children of p_input for unused vout */
 139                 if( p_vout && p_vout->p_parent != p_playlist )
 140                 {
 141                     vlc_object_release( p_vout );
 142                     p_vout = NULL;
 143                 }
 144                 vlc_object_release( p_playlist );
 145             }
 146         }
 147     }
 148
 149     /* If we now have a video output, check it has the right properties */
 150     if( p_vout )
 151     {
 152         char *psz_filter_chain;
 153
 154         /* We don't directly check for the "filter" variable for obvious
 155          * performance reasons. */
 156         if( p_vout->b_filter_change )
 157         {
 158             psz_filter_chain = config_GetPsz( p_this, "filter" );
 159
 160             if( psz_filter_chain && !*psz_filter_chain )
 161             {
 162                 free( psz_filter_chain );
 163                 psz_filter_chain = NULL;
 164             }
 165             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 166             {
 167                 free( p_vout->psz_filter_chain );
 168                 p_vout->psz_filter_chain = NULL;
 169             }
 170
 171             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 172                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 173                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 174             {
 175                 p_vout->b_filter_change = VLC_FALSE;
 176             }
 177
 178             if( psz_filter_chain ) free( psz_filter_chain );
 179         }
 180
 181         if( ( p_vout->render.i_width != i_width ) ||
 182             ( p_vout->render.i_height != i_height ) ||
 183             ( p_vout->render.i_chroma != i_chroma ) ||
 184             ( p_vout->render.i_aspect != i_aspect
 185                     && !p_vout->b_override_aspect ) ||
 186             p_vout->b_filter_change )
 187         {
 188             /* We are not interested in this format, close this vout */
 189             vlc_object_detach( p_vout );
 190             vlc_object_release( p_vout );
 191             vout_Destroy( p_vout );
 192             p_vout = NULL;
 193         }
 194         else
 195         {
 196             /* This video output is cool! Hijack it. */
 197             vlc_object_detach( p_vout );
 198             vlc_object_attach( p_vout, p_this );
 199             vlc_object_release( p_vout );
 200         }
 201     }
 202
 203     if( !p_vout )
 204     {
 205         msg_Dbg( p_this, "no usable vout present, spawning one" );
 206
 207         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 208     }
 209
 210     return p_vout;
 211 }
 212
 213 /*****************************************************************************
 214  * vout_Create: creates a new video output thread
 215  *****************************************************************************
 216  * This function creates a new video output thread, and returns a pointer
 217  * to its description. On error, it returns NULL.
 218  *****************************************************************************/
 219 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 220                                unsigned int i_width, unsigned int i_height,
 221                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 222 {
 223     vout_thread_t  * p_vout;                            /* thread descriptor */
 224     input_thread_t * p_input_thread;
 225     int              i_index;                               /* loop variable */
 226     char           * psz_plugin;
 227     vlc_value_t      val, text;
 228
 229     /* Allocate descriptor */
 230     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 231     if( p_vout == NULL )
 232     {
 233         msg_Err( p_parent, "out of memory" );
 234         return NULL;
 235     }
 236
 237     /* Initialize pictures and subpictures - translation tables and functions
 238      * will be initialized later in InitThread */
 239     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
 240     {
 241         p_vout->p_picture[i_index].pf_lock = NULL;
 242         p_vout->p_picture[i_index].pf_unlock = NULL;
 243         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 244         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 245     }
 246
 247     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 248     {
 249         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 250         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 251     }
 252
 253     /* No images in the heap */
 254     p_vout->i_heap_size = 0;
 255
 256     /* Initialize the rendering heap */
 257     I_RENDERPICTURES = 0;
 258     p_vout->render.i_width    = i_width;
 259     p_vout->render.i_height   = i_height;
 260     p_vout->render.i_chroma   = i_chroma;
 261     p_vout->render.i_aspect   = i_aspect;
 262
 263     p_vout->render.i_rmask    = 0;
 264     p_vout->render.i_gmask    = 0;
 265     p_vout->render.i_bmask    = 0;
 266
 267     p_vout->render.i_last_used_pic = -1;
 268     p_vout->render.b_allow_modify_pics = 1;
 269
 270     /* Zero the output heap */
 271     I_OUTPUTPICTURES = 0;
 272     p_vout->output.i_width    = 0;
 273     p_vout->output.i_height   = 0;
 274     p_vout->output.i_chroma   = 0;
 275     p_vout->output.i_aspect   = 0;
 276
 277     p_vout->output.i_rmask    = 0;
 278     p_vout->output.i_gmask    = 0;
 279     p_vout->output.i_bmask    = 0;
 280
 281     /* Initialize misc stuff */
 282     p_vout->i_changes    = 0;
 283     p_vout->f_gamma      = 0;
 284     p_vout->b_grayscale  = 0;
 285     p_vout->b_info       = 0;
 286     p_vout->b_interface  = 0;
 287     p_vout->b_scale      = 1;
 288     p_vout->b_fullscreen = 0;
 289     p_vout->i_alignment  = 0;
 290     p_vout->render_time  = 10;
 291     p_vout->c_fps_samples = 0;
 292     p_vout->b_filter_change = 0;
 293
 294     /* Mouse coordinates */
 295     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 296     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 297     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 298     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 299     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 300
 301     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 302     val.b_bool = VLC_TRUE;
 303     var_Set( p_vout, "intf-change", val );
 304
 305     /* Initialize locks */
 306     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 307     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 308     vlc_mutex_init( p_vout, &p_vout->change_lock );
 309
 310     /* Attach the new object now so we can use var inheritance below */
 311     vlc_object_attach( p_vout, p_parent );
 312
 313     /* Create a few object variables we'll need later on */
 314     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 315     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 316     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 317     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 318     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 319
 320     p_vout->b_override_aspect = VLC_FALSE;
 321
 322     /* If the parent is not a VOUT object, that means we are at the start of
 323      * the video output pipe */
 324     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 325     {
 326         var_Get( p_vout, "aspect-ratio", &val );
 327
 328         /* Check whether the user tried to override aspect ratio */
 329         if( val.psz_string )
 330         {
 331             unsigned int i_new_aspect = i_aspect;
 332             char *psz_parser = strchr( val.psz_string, ':' );
 333
 334             if( psz_parser )
 335             {
 336                 *psz_parser++ = '\0';
 337                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 338                                                       / atoi( psz_parser );
 339             }
 340             else
 341             {
 342                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 343                                        * atof( val.psz_string )
 344                                        / i_height;
 345             }
 346
 347             free( val.psz_string );
 348
 349             if( i_new_aspect && i_new_aspect != i_aspect )
 350             {
 351                 unsigned int i_aspect_x, i_aspect_y;
 352
 353                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 354
 355                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 356                          i_aspect_x, i_aspect_y );
 357
 358                 p_vout->render.i_aspect = i_new_aspect;
 359
 360                 p_vout->b_override_aspect = VLC_TRUE;
 361             }
 362         }
 363
 364         /* Look for the default filter configuration */
 365         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 366         var_Get( p_vout, "filter", &val );
 367         p_vout->psz_filter_chain = val.psz_string;
 368     }
 369     else
 370     {
 371         /* continue the parent's filter chain */
 372         char *psz_end;
 373
 374         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 375         if( psz_end && *(psz_end+1) )
 376             p_vout->psz_filter_chain = strdup( psz_end+1 );
 377         else p_vout->psz_filter_chain = NULL;
 378     }
 379
 380     /* Choose the video output module */
 381     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 382     {
 383         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 384         var_Get( p_vout, "vout", &val );
 385         psz_plugin = val.psz_string;
 386     }
 387     else
 388     {
 389         /* the filter chain is a string list of filters separated by double
 390          * colons */
 391         char *psz_end;
 392
 393         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 394         if( psz_end )
 395             psz_plugin = strndup( p_vout->psz_filter_chain,
 396                                   psz_end - p_vout->psz_filter_chain );
 397         else psz_plugin = strdup( p_vout->psz_filter_chain );
 398     }
 399
 400     /* Initialize the dimensions of the video window */
 401     InitWindowSize( p_vout, &p_vout->i_window_width,
 402                     &p_vout->i_window_height );
 403
 404     /* Create the vout thread */
 405     p_vout->p_module = module_Need( p_vout,
 406                            ( p_vout->psz_filter_chain &&
 407                                *p_vout->psz_filter_chain ) ?
 408                            "video filter" : "video output",
 409                            psz_plugin );
 410
 411     if( psz_plugin ) free( psz_plugin );
 412     if( p_vout->p_module == NULL )
 413     {
 414         msg_Err( p_vout, "no suitable vout module" );
 415         vlc_object_destroy( p_vout );
 416         return NULL;
 417     }
 418
 419     p_vout->p_text_renderer_module = module_Need( p_vout, "text renderer",
 420                                                   NULL );
 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, "fullscreen", VLC_VAR_BOOL );
 429     text.psz_string = _("Fullscreen");
 430     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 431     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
 432     if( val.b_bool )
 433     {
 434         /* user requested fullscreen */
 435         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 436     }
 437     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 438
 439     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 440     text.psz_string = _("Deinterlace");
 441     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 442     val.psz_string = ""; text.psz_string = _("Disable");
 443     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 444     val.psz_string = "discard"; text.psz_string = _("Discard");
 445     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 446     val.psz_string = "blend"; text.psz_string = _("Blend");
 447     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 448     val.psz_string = "mean"; text.psz_string = _("Mean");
 449     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 450     val.psz_string = "bob"; text.psz_string = _("Bob");
 451     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 452     val.psz_string = "linear"; text.psz_string = _("Linear");
 453     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 454     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 455     {
 456         var_Set( p_vout, "deinterlace", val );
 457         if( val.psz_string ) free( val.psz_string );
 458     }
 459     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 460
 461
 462     var_Create( p_vout, "filter", VLC_VAR_STRING );
 463     text.psz_string = _("Filters");
 464     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 465     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 466     if( val.psz_string )
 467     {
 468         var_Set( p_vout, "filter", val );
 469         free( val.psz_string );
 470     }
 471     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 472
 473     /* Calculate delay created by internal caching */
 474     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 475                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 476     if( p_input_thread )
 477     {
 478         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 479         vlc_object_release( p_input_thread );
 480     }
 481     else
 482     {
 483         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 484     }
 485
 486     if( vlc_thread_create( p_vout, "video output", RunThread,
 487                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 488     {
 489         msg_Err( p_vout, "out of memory" );
 490         module_Unneed( p_vout, p_vout->p_module );
 491         vlc_object_destroy( p_vout );
 492         return NULL;
 493     }
 494
 495     return p_vout;
 496 }
 497
 498 /*****************************************************************************
 499  * vout_Destroy: destroys a previously created video output
 500  *****************************************************************************
 501  * Destroy a terminated thread.
 502  * The function will request a destruction of the specified thread. If pi_error
 503  * is NULL, it will return once the thread is destroyed. Else, it will be
 504  * update using one of the THREAD_* constants.
 505  *****************************************************************************/
 506 void vout_Destroy( vout_thread_t *p_vout )
 507 {
 508     vlc_object_t *p_playlist;
 509
 510     /* Request thread destruction */
 511     p_vout->b_die = VLC_TRUE;
 512     vlc_thread_join( p_vout );
 513
 514     var_Destroy( p_vout, "intf-change" );
 515
 516     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 517                                   FIND_ANYWHERE );
 518
 519     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 520
 521     /* Free structure */
 522     vlc_object_destroy( p_vout );
 523
 524     /* If it was the last vout, tell the interface to show up */
 525     if( p_playlist != NULL )
 526     {
 527         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 528                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 529         if( p_another_vout == NULL )
 530         {
 531             vlc_value_t val;
 532             val.b_bool = VLC_TRUE;
 533             var_Set( p_playlist, "intf-show", val );
 534         }
 535         else
 536         {
 537             vlc_object_release( p_another_vout );
 538         }
 539         vlc_object_release( p_playlist );
 540     }
 541 }
 542
 543 /*****************************************************************************
 544  * InitThread: initialize video output thread
 545  *****************************************************************************
 546  * This function is called from RunThread and performs the second step of the
 547  * initialization. It returns 0 on success. Note that the thread's flag are not
 548  * modified inside this function.
 549  *****************************************************************************/
 550 static int InitThread( vout_thread_t *p_vout )
 551 {
 552     int i;
 553     unsigned int i_aspect_x, i_aspect_y;
 554
 555     vlc_mutex_lock( &p_vout->change_lock );
 556
 557 #ifdef STATS
 558     p_vout->c_loops = 0;
 559 #endif
 560
 561     /* Initialize output method, it allocates direct buffers for us */
 562     if( p_vout->pf_init( p_vout ) )
 563     {
 564         vlc_mutex_unlock( &p_vout->change_lock );
 565         return VLC_EGENERIC;
 566     }
 567
 568     if( !I_OUTPUTPICTURES )
 569     {
 570         msg_Err( p_vout, "plugin was unable to allocate at least "
 571                          "one direct buffer" );
 572         p_vout->pf_end( p_vout );
 573         vlc_mutex_unlock( &p_vout->change_lock );
 574         return VLC_EGENERIC;
 575     }
 576
 577     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 578     {
 579         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 580                          "our internal buffers must have overflown." );
 581         p_vout->pf_end( p_vout );
 582         vlc_mutex_unlock( &p_vout->change_lock );
 583         return VLC_EGENERIC;
 584     }
 585
 586     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 587
 588 #if 0
 589     if( !p_vout->psz_filter_chain )
 590     {
 591         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 592
 593         if( psz_aspect )
 594         {
 595             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 596                                                       * atof( psz_aspect )
 597                                                       / p_vout->output.i_height;
 598             free( psz_aspect );
 599
 600             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 601             {
 602                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 603
 604                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 605                          i_aspect_x, i_aspect_y );
 606                 p_vout->output.i_aspect = i_new_aspect;
 607             }
 608         }
 609     }
 610 #endif
 611
 612     vout_AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 613     msg_Dbg( p_vout,
 614              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 615              p_vout->render.i_width, p_vout->render.i_height,
 616              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 617              i_aspect_x, i_aspect_y );
 618
 619     vout_AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 620     msg_Dbg( p_vout,
 621              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 622              p_vout->output.i_width, p_vout->output.i_height,
 623              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 624              i_aspect_x, i_aspect_y );
 625
 626     /* Calculate shifts from system-updated masks */
 627     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 628                  p_vout->output.i_rmask );
 629     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 630                  p_vout->output.i_gmask );
 631     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 632                  p_vout->output.i_bmask );
 633
 634     /* Check whether we managed to create direct buffers similar to
 635      * the render buffers, ie same size and chroma */
 636     if( ( p_vout->output.i_width == p_vout->render.i_width )
 637      && ( p_vout->output.i_height == p_vout->render.i_height )
 638      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 639     {
 640         /* Cool ! We have direct buffers, we can ask the decoder to
 641          * directly decode into them ! Map the first render buffers to
 642          * the first direct buffers, but keep the first direct buffer
 643          * for memcpy operations */
 644         p_vout->b_direct = 1;
 645
 646         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 647         {
 648             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 649                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 650                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 651             {
 652                 /* We have enough direct buffers so there's no need to
 653                  * try to use system memory buffers. */
 654                 break;
 655             }
 656             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 657             I_RENDERPICTURES++;
 658         }
 659
 660         msg_Dbg( p_vout, "direct render, mapping "
 661                  "render pictures 0-%i to system pictures 1-%i",
 662                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 663     }
 664     else
 665     {
 666         /* Rats... Something is wrong here, we could not find an output
 667          * plugin able to directly render what we decode. See if we can
 668          * find a chroma plugin to do the conversion */
 669         p_vout->b_direct = 0;
 670
 671         /* Choose the best module */
 672         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
 673
 674         if( p_vout->chroma.p_module == NULL )
 675         {
 676             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 677                      (char*)&p_vout->render.i_chroma,
 678                      (char*)&p_vout->output.i_chroma );
 679             p_vout->pf_end( p_vout );
 680             vlc_mutex_unlock( &p_vout->change_lock );
 681             return VLC_EGENERIC;
 682         }
 683
 684         msg_Dbg( p_vout, "indirect render, mapping "
 685                  "render pictures 0-%i to system pictures %i-%i",
 686                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 687                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 688
 689         /* Append render buffers after the direct buffers */
 690         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 691         {
 692             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 693             I_RENDERPICTURES++;
 694
 695             /* Check if we have enough render pictures */
 696             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 697                 break;
 698         }
 699     }
 700
 701     /* Link pictures back to their heap */
 702     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 703     {
 704         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 705     }
 706
 707     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 708     {
 709         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 710     }
 711
 712 /* XXX XXX mark thread ready */
 713     return VLC_SUCCESS;
 714 }
 715
 716 /*****************************************************************************
 717  * RunThread: video output thread
 718  *****************************************************************************
 719  * Video output thread. This function does only returns when the thread is
 720  * terminated. It handles the pictures arriving in the video heap and the
 721  * display device events.
 722  *****************************************************************************/
 723 static void RunThread( vout_thread_t *p_vout)
 724 {
 725     int             i_index;                                /* index in heap */
 726     int             i_idle_loops = 0;  /* loops without displaying a picture */
 727     mtime_t         current_date;                            /* current date */
 728     mtime_t         display_date;                            /* display date */
 729
 730     picture_t *     p_picture;                            /* picture pointer */
 731     picture_t *     p_last_picture = NULL;                   /* last picture */
 732     picture_t *     p_directbuffer;              /* direct buffer to display */
 733
 734     subpicture_t *  p_subpic;                          /* subpicture pointer */
 735
 736     /*
 737      * Initialize thread
 738      */
 739     p_vout->b_error = InitThread( p_vout );
 740
 741     /* signal the creation of the vout */
 742     vlc_thread_ready( p_vout );
 743
 744     if( p_vout->b_error )
 745     {
 746         /* Destroy thread structures allocated by Create and InitThread */
 747         DestroyThread( p_vout );
 748         return;
 749     }
 750
 751     /*
 752      * Main loop - it is not executed if an error occured during
 753      * initialization
 754      */
 755     while( (!p_vout->b_die) && (!p_vout->b_error) )
 756     {
 757         /* Initialize loop variables */
 758         p_picture = NULL;
 759         display_date = 0;
 760         current_date = mdate();
 761
 762 #if 0
 763         p_vout->c_loops++;
 764         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 765         {
 766             msg_Dbg( p_vout, "picture heap: %d/%d",
 767                      I_RENDERPICTURES, p_vout->i_heap_size );
 768         }
 769 #endif
 770
 771         /*
 772          * Find the picture to display (the one with the earliest date).
 773          * This operation does not need lock, since only READY_PICTUREs
 774          * are handled. */
 775         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 776         {
 777             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 778                 && ( (p_picture == NULL) ||
 779                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 780             {
 781                 p_picture = PP_RENDERPICTURE[i_index];
 782                 display_date = p_picture->date;
 783             }
 784         }
 785
 786         if( p_picture )
 787         {
 788             /* If we met the last picture, parse again to see whether there is
 789              * a more appropriate one. */
 790             if( p_picture == p_last_picture )
 791             {
 792                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 793                 {
 794                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 795                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 796                         && ((p_picture == p_last_picture) ||
 797                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 798                     {
 799                         p_picture = PP_RENDERPICTURE[i_index];
 800                         display_date = p_picture->date;
 801                     }
 802                 }
 803             }
 804
 805             /* If we found better than the last picture, destroy it */
 806             if( p_last_picture && p_picture != p_last_picture )
 807             {
 808                 vlc_mutex_lock( &p_vout->picture_lock );
 809                 if( p_last_picture->i_refcount )
 810                 {
 811                     p_last_picture->i_status = DISPLAYED_PICTURE;
 812                 }
 813                 else
 814                 {
 815                     p_last_picture->i_status = DESTROYED_PICTURE;
 816                     p_vout->i_heap_size--;
 817                 }
 818                 vlc_mutex_unlock( &p_vout->picture_lock );
 819                 p_last_picture = NULL;
 820             }
 821
 822             /* Compute FPS rate */
 823             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 824                 = display_date;
 825
 826             if( !p_picture->b_force &&
 827                 p_picture != p_last_picture &&
 828                 display_date < current_date + p_vout->render_time )
 829             {
 830                 /* Picture is late: it will be destroyed and the thread
 831                  * will directly choose the next picture */
 832                 vlc_mutex_lock( &p_vout->picture_lock );
 833                 if( p_picture->i_refcount )
 834                 {
 835                     /* Pretend we displayed the picture, but don't destroy
 836                      * it since the decoder might still need it. */
 837                     p_picture->i_status = DISPLAYED_PICTURE;
 838                 }
 839                 else
 840                 {
 841                     /* Destroy the picture without displaying it */
 842                     p_picture->i_status = DESTROYED_PICTURE;
 843                     p_vout->i_heap_size--;
 844                 }
 845                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 846                                   current_date - display_date );
 847                 vlc_mutex_unlock( &p_vout->picture_lock );
 848
 849                 continue;
 850             }
 851
 852             if( display_date >
 853                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 854             {
 855                 /* Picture is waaay too early: it will be destroyed */
 856                 vlc_mutex_lock( &p_vout->picture_lock );
 857                 if( p_picture->i_refcount )
 858                 {
 859                     /* Pretend we displayed the picture, but don't destroy
 860                      * it since the decoder might still need it. */
 861                     p_picture->i_status = DISPLAYED_PICTURE;
 862                 }
 863                 else
 864                 {
 865                     /* Destroy the picture without displaying it */
 866                     p_picture->i_status = DESTROYED_PICTURE;
 867                     p_vout->i_heap_size--;
 868                 }
 869                 msg_Warn( p_vout, "vout warning: early picture skipped "
 870                           "("I64Fd")", display_date - current_date
 871                           - p_vout->i_pts_delay );
 872                 vlc_mutex_unlock( &p_vout->picture_lock );
 873
 874                 continue;
 875             }
 876
 877             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 878             {
 879                 /* A picture is ready to be rendered, but its rendering date
 880                  * is far from the current one so the thread will perform an
 881                  * empty loop as if no picture were found. The picture state
 882                  * is unchanged */
 883                 p_picture    = NULL;
 884                 display_date = 0;
 885             }
 886             else if( p_picture == p_last_picture )
 887             {
 888                 /* We are asked to repeat the previous picture, but we first
 889                  * wait for a couple of idle loops */
 890                 if( i_idle_loops < 4 )
 891                 {
 892                     p_picture    = NULL;
 893                     display_date = 0;
 894                 }
 895                 else
 896                 {
 897                     /* We set the display date to something high, otherwise
 898                      * we'll have lots of problems with late pictures */
 899                     display_date = current_date + p_vout->render_time;
 900                 }
 901             }
 902         }
 903
 904         if( p_picture == NULL )
 905         {
 906             i_idle_loops++;
 907         }
 908
 909         /*
 910          * Check for subpictures to display
 911          */
 912         p_subpic = vout_SortSubPictures( p_vout, display_date );
 913
 914         /*
 915          * Perform rendering
 916          */
 917         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 918
 919         /*
 920          * Call the plugin-specific rendering method if there is one
 921          */
 922         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 923         {
 924             /* Render the direct buffer returned by vout_RenderPicture */
 925             p_vout->pf_render( p_vout, p_directbuffer );
 926         }
 927
 928         /*
 929          * Sleep, wake up
 930          */
 931         if( display_date != 0 && p_directbuffer != NULL )
 932         {
 933             mtime_t current_render_time = mdate() - current_date;
 934             /* if render time is very large we don't include it in the mean */
 935             if( current_render_time < p_vout->render_time +
 936                 VOUT_DISPLAY_DELAY )
 937             {
 938                 /* Store render time using a sliding mean weighting to
 939                  * current value in a 3 to 1 ratio*/
 940                 p_vout->render_time *= 3;
 941                 p_vout->render_time += current_render_time;
 942                 p_vout->render_time >>= 2;
 943             }
 944         }
 945
 946         /* Give back change lock */
 947         vlc_mutex_unlock( &p_vout->change_lock );
 948
 949         /* Sleep a while or until a given date */
 950         if( display_date != 0 )
 951         {
 952             /* If there are filters in the chain, better give them the picture
 953              * in advance */
 954             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 955             {
 956                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 957             }
 958         }
 959         else
 960         {
 961             msleep( VOUT_IDLE_SLEEP );
 962         }
 963
 964         /* On awakening, take back lock and send immediately picture
 965          * to display. */
 966         vlc_mutex_lock( &p_vout->change_lock );
 967
 968         /*
 969          * Display the previously rendered picture
 970          */
 971         if( p_picture != NULL && p_directbuffer != NULL )
 972         {
 973             /* Display the direct buffer returned by vout_RenderPicture */
 974             if( p_vout->pf_display )
 975             {
 976                 p_vout->pf_display( p_vout, p_directbuffer );
 977             }
 978
 979             /* Reinitialize idle loop count */
 980             i_idle_loops = 0;
 981
 982             /* Tell the vout this was the last picture and that it does not
 983              * need to be forced anymore. */
 984             p_last_picture = p_picture;
 985             p_last_picture->b_force = 0;
 986         }
 987
 988         /*
 989          * Check events and manage thread
 990          */
 991         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 992         {
 993             /* A fatal error occured, and the thread must terminate
 994              * immediately, without displaying anything - setting b_error to 1
 995              * causes the immediate end of the main while() loop. */
 996             p_vout->b_error = 1;
 997         }
 998
 999         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
1000         {
1001             /* this must only happen when the vout plugin is incapable of
1002              * rescaling the picture itself. In this case we need to destroy
1003              * the current picture buffers and recreate new ones with the right
1004              * dimensions */
1005             int i;
1006
1007             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1008
1009             p_vout->pf_end( p_vout );
1010             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1011                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1012
1013             I_OUTPUTPICTURES = 0;
1014             if( p_vout->pf_init( p_vout ) )
1015             {
1016                 msg_Err( p_vout, "cannot resize display" );
1017                 /* FIXME: pf_end will be called again in EndThread() */
1018                 p_vout->b_error = 1;
1019             }
1020
1021             /* Need to reinitialise the chroma plugin */
1022             if( p_vout->chroma.p_module )
1023             {
1024                 if( p_vout->chroma.p_module->pf_deactivate )
1025                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1026                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1027             }
1028         }
1029
1030         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1031         {
1032             /* This happens when the picture buffers need to be recreated.
1033              * This is useful on multimonitor displays for instance.
1034              *
1035              * Warning: This only works when the vout creates only 1 picture
1036              * buffer!! */
1037             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1038
1039             if( !p_vout->b_direct )
1040             {
1041                 module_Unneed( p_vout, p_vout->chroma.p_module );
1042             }
1043
1044             vlc_mutex_lock( &p_vout->picture_lock );
1045
1046             p_vout->pf_end( p_vout );
1047
1048             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1049
1050             p_vout->b_error = InitThread( p_vout );
1051
1052             vlc_mutex_unlock( &p_vout->picture_lock );
1053         }
1054     }
1055
1056     /*
1057      * Error loop - wait until the thread destruction is requested
1058      */
1059     if( p_vout->b_error )
1060     {
1061         ErrorThread( p_vout );
1062     }
1063
1064     /* End of thread */
1065     EndThread( p_vout );
1066
1067     /* Destroy thread structures allocated by CreateThread */
1068     DestroyThread( p_vout );
1069 }
1070
1071 /*****************************************************************************
1072  * ErrorThread: RunThread() error loop
1073  *****************************************************************************
1074  * This function is called when an error occured during thread main's loop. The
1075  * thread can still receive feed, but must be ready to terminate as soon as
1076  * possible.
1077  *****************************************************************************/
1078 static void ErrorThread( vout_thread_t *p_vout )
1079 {
1080     /* Wait until a `die' order */
1081     while( !p_vout->b_die )
1082     {
1083         /* Sleep a while */
1084         msleep( VOUT_IDLE_SLEEP );
1085     }
1086 }
1087
1088 /*****************************************************************************
1089  * EndThread: thread destruction
1090  *****************************************************************************
1091  * This function is called when the thread ends after a sucessful
1092  * initialization. It frees all ressources allocated by InitThread.
1093  *****************************************************************************/
1094 static void EndThread( vout_thread_t *p_vout )
1095 {
1096     int     i_index;                                        /* index in heap */
1097
1098 #ifdef STATS
1099     {
1100         struct tms cpu_usage;
1101         times( &cpu_usage );
1102
1103         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1104                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1105     }
1106 #endif
1107
1108     if( !p_vout->b_direct )
1109     {
1110         module_Unneed( p_vout, p_vout->chroma.p_module );
1111     }
1112
1113     /* Destroy all remaining pictures */
1114     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1115     {
1116         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1117         {
1118             free( p_vout->p_picture[i_index].p_data_orig );
1119         }
1120     }
1121
1122     /* Destroy all remaining subpictures */
1123     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1124     {
1125         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1126         {
1127             vout_DestroySubPicture( p_vout,
1128                                     &p_vout->p_subpicture[i_index] );
1129         }
1130     }
1131
1132     if( p_vout->p_text_renderer_module )
1133         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1134
1135     /* Destroy translation tables */
1136     p_vout->pf_end( p_vout );
1137
1138     /* Release the change lock */
1139     vlc_mutex_unlock( &p_vout->change_lock );
1140 }
1141
1142 /*****************************************************************************
1143  * DestroyThread: thread destruction
1144  *****************************************************************************
1145  * This function is called when the thread ends. It frees all ressources
1146  * allocated by CreateThread. Status is available at this stage.
1147  *****************************************************************************/
1148 static void DestroyThread( vout_thread_t *p_vout )
1149 {
1150     /* Destroy the locks */
1151     vlc_mutex_destroy( &p_vout->picture_lock );
1152     vlc_mutex_destroy( &p_vout->subpicture_lock );
1153     vlc_mutex_destroy( &p_vout->change_lock );
1154
1155     /* Release the module */
1156     module_Unneed( p_vout, p_vout->p_module );
1157 }
1158
1159 /* following functions are local */
1160
1161 static int ReduceHeight( int i_ratio )
1162 {
1163     int i_dummy = VOUT_ASPECT_FACTOR;
1164     int i_pgcd  = 1;
1165
1166     if( !i_ratio )
1167     {
1168         return i_pgcd;
1169     }
1170
1171     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1172     while( !(i_ratio & 1) && !(i_dummy & 1) )
1173     {
1174         i_ratio >>= 1;
1175         i_dummy >>= 1;
1176         i_pgcd  <<= 1;
1177     }
1178
1179     while( !(i_ratio % 3) && !(i_dummy % 3) )
1180     {
1181         i_ratio /= 3;
1182         i_dummy /= 3;
1183         i_pgcd  *= 3;
1184     }
1185
1186     while( !(i_ratio % 5) && !(i_dummy % 5) )
1187     {
1188         i_ratio /= 5;
1189         i_dummy /= 5;
1190         i_pgcd  *= 5;
1191     }
1192
1193     return i_pgcd;
1194 }
1195
1196 /*****************************************************************************
1197  * BinaryLog: computes the base 2 log of a binary value
1198  *****************************************************************************
1199  * This functions is used by MaskToShift, to get a bit index from a binary
1200  * value.
1201  *****************************************************************************/
1202 static int BinaryLog( uint32_t i )
1203 {
1204     int i_log = 0;
1205
1206     if( i == 0 ) return -31337;
1207
1208     if( i & 0xffff0000 ) i_log += 16;
1209     if( i & 0xff00ff00 ) i_log += 8;
1210     if( i & 0xf0f0f0f0 ) i_log += 4;
1211     if( i & 0xcccccccc ) i_log += 2;
1212     if( i & 0xaaaaaaaa ) i_log += 1;
1213
1214     return i_log;
1215 }
1216
1217 /*****************************************************************************
1218  * MaskToShift: transform a color mask into right and left shifts
1219  *****************************************************************************
1220  * This function is used for obtaining color shifts from masks.
1221  *****************************************************************************/
1222 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1223 {
1224     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1225
1226     if( !i_mask )
1227     {
1228         *pi_left = *pi_right = 0;
1229         return;
1230     }
1231
1232     /* Get bits */
1233     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1234     i_high = i_mask + i_low;                       /* higher bit of the mask */
1235
1236     /* Transform bits into an index */
1237     i_low =  BinaryLog (i_low);
1238     i_high = BinaryLog (i_high);
1239
1240     /* Update pointers and return */
1241     *pi_left =   i_low;
1242     *pi_right = (8 - i_high + i_low);
1243 }
1244
1245 /*****************************************************************************
1246  * InitWindowSize: find the initial dimensions the video window should have.
1247  *****************************************************************************
1248  * This function will check the "width", "height" and "zoom" config options and
1249  * will calculate the size that the video window should have.
1250  *****************************************************************************/
1251 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1252                             int *pi_height )
1253 {
1254     vlc_value_t val;
1255     int i_width, i_height;
1256     uint64_t ll_zoom;
1257
1258 #define FP_FACTOR 1000                             /* our fixed point factor */
1259
1260     var_Get( p_vout, "align", &val );
1261     p_vout->i_alignment = val.i_int;
1262
1263     var_Get( p_vout, "width", &val );
1264     i_width = val.i_int;
1265     var_Get( p_vout, "height", &val );
1266     i_height = val.i_int;
1267     var_Get( p_vout, "zoom", &val );
1268     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1269
1270     if( i_width > 0 && i_height > 0)
1271     {
1272         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1273         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1274         return;
1275     }
1276     else if( i_width > 0 )
1277     {
1278         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1279         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1280                             p_vout->render.i_aspect / FP_FACTOR );
1281         return;
1282     }
1283     else if( i_height > 0 )
1284     {
1285         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1286         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1287                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1288         return;
1289     }
1290
1291     if( p_vout->render.i_height * p_vout->render.i_aspect
1292         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1293     {
1294         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1295           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1296         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1297     }
1298     else
1299     {
1300         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1301         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1302           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1303     }
1304
1305 #undef FP_FACTOR
1306 }
1307
1308 /*****************************************************************************
1309  * vout_VarCallback: generic callback for intf variables
1310  *****************************************************************************/
1311 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1312                       vlc_value_t old_value, vlc_value_t new_value,
1313                       void * unused )
1314 {
1315     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1316     vlc_value_t val;
1317     val.b_bool = VLC_TRUE;
1318     var_Set( p_vout, "intf-change", val );
1319     return VLC_SUCCESS;
1320 }
1321
1322 /*****************************************************************************
1323  * object variables callbacks: a bunch of object variables are used by the
1324  * interfaces to interact with the vout.
1325  *****************************************************************************/
1326 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
1327                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1328 {
1329     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1330     input_thread_t *p_input;
1331     vlc_value_t val;
1332
1333     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
1334
1335     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1336                                                  FIND_PARENT );
1337     if( p_input )
1338     {
1339         /* Modify input as well because the vout might have to be restarted */
1340         var_Create( p_input, "fullscreen", VLC_VAR_BOOL );
1341         var_Set( p_input, "fullscreen", newval );
1342
1343         vlc_object_release( p_input );
1344     }
1345
1346     val.b_bool = VLC_TRUE;
1347     var_Set( p_vout, "intf-change", val );
1348     return VLC_SUCCESS;
1349 }
1350
1351 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1352                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1353 {
1354     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1355     input_thread_t *p_input;
1356     vlc_value_t val;
1357
1358     char *psz_mode = newval.psz_string;
1359     char *psz_filter;
1360     unsigned int  i;
1361
1362     psz_filter = config_GetPsz( p_vout, "filter" );
1363
1364     if( !psz_mode || !*psz_mode )
1365     {
1366         config_PutPsz( p_vout, "filter", "" );
1367     }
1368     else
1369     {
1370         if( !psz_filter || !*psz_filter )
1371         {
1372             config_PutPsz( p_vout, "filter", "deinterlace" );
1373         }
1374         else
1375         {
1376             if( strstr( psz_filter, "deinterlace" ) == NULL )
1377             {
1378                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1379                 strcat( psz_filter, ",deinterlace" );
1380             }
1381             config_PutPsz( p_vout, "filter", psz_filter );
1382         }
1383     }
1384
1385     if( psz_filter ) free( psz_filter );
1386
1387
1388     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1389                                                  FIND_PARENT );
1390     if( !p_input ) return VLC_EGENERIC;
1391
1392     if( psz_mode && *psz_mode )
1393     {
1394         val.psz_string = psz_mode;
1395         var_Set( p_vout, "deinterlace-mode", val );
1396         /* Modify input as well because the vout might have to be restarted */
1397         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1398         var_Set( p_input, "deinterlace-mode", val );
1399     }
1400
1401     /* now restart all video streams */
1402     vlc_mutex_lock( &p_input->stream.stream_lock );
1403
1404     p_vout->b_filter_change = VLC_TRUE;
1405
1406 #define ES p_input->stream.pp_es[i]
1407
1408     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1409     {
1410         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1411         {
1412             input_UnselectES( p_input, ES );
1413             input_SelectES( p_input, ES );
1414         }
1415 #undef ES
1416     }
1417     vlc_mutex_unlock( &p_input->stream.stream_lock );
1418
1419     vlc_object_release( p_input );
1420
1421     val.b_bool = VLC_TRUE;
1422     var_Set( p_vout, "intf-change", val );
1423     return VLC_SUCCESS;
1424 }
1425
1426 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1427                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1428 {
1429     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1430     input_thread_t *p_input;
1431     vlc_value_t val;
1432     unsigned int i;
1433
1434     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1435                                                  FIND_PARENT );
1436
1437     if (!p_input)
1438     {
1439         msg_Err( p_vout, "Input not found" );
1440         return( VLC_EGENERIC );
1441     }
1442     /* Restart the video stream */
1443     vlc_mutex_lock( &p_input->stream.stream_lock );
1444
1445     p_vout->b_filter_change = VLC_TRUE;
1446
1447 #define ES p_input->stream.pp_es[i]
1448
1449     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1450     {
1451         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1452         {
1453             input_UnselectES( p_input, ES );
1454             input_SelectES( p_input, ES );
1455         }
1456 #undef ES
1457     }
1458     vlc_mutex_unlock( &p_input->stream.stream_lock );
1459
1460     vlc_object_release( p_input );
1461
1462     val.b_bool = VLC_TRUE;
1463     var_Set( p_vout, "intf-change", val );
1464     return VLC_SUCCESS;
1465 }
1466