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