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

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  * This module describes the programming interface for video output threads.
   4  * It includes functions allowing to open a new thread, send pictures to a
   5  * thread, and destroy a previously oppened video output thread.
   6  *****************************************************************************
   7  * Copyright (C) 2000-2001 VideoLAN
   8  * $Id: video_output.c,v 1.242 2003/12/11 23:12:46 gbazin Exp $
   9  *
  10  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include <stdlib.h>                                                /* free() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #ifdef HAVE_SYS_TIMES_H
  35 #   include <sys/times.h>
  36 #endif
  37
  38 #include "vlc_video.h"
  39 #include "video_output.h"
  40 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  41
  42 #if defined( SYS_DARWIN )
  43 #include "darwin_specific.h"
  44 #endif
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int      InitThread        ( vout_thread_t * );
  50 static void     RunThread         ( vout_thread_t * );
  51 static void     ErrorThread       ( vout_thread_t * );
  52 static void     EndThread         ( vout_thread_t * );
  53 static void     DestroyThread     ( vout_thread_t * );
  54
  55 static int      ReduceHeight      ( int );
  56 static int      BinaryLog         ( uint32_t );
  57 static void     MaskToShift       ( int *, int *, uint32_t );
  58 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  59
  60 /* Object variables callbacks */
  61 static int FullscreenCallback( vlc_object_t *, char const *,
  62                                vlc_value_t, vlc_value_t, void * );
  63 static int DeinterlaceCallback( vlc_object_t *, char const *,
  64                                 vlc_value_t, vlc_value_t, void * );
  65 static int FilterCallback( vlc_object_t *, char const *,
  66                            vlc_value_t, vlc_value_t, void * );
  67
  68 /*****************************************************************************
  69  * vout_Request: find a video output thread, create one, or destroy one.
  70  *****************************************************************************
  71  * This function looks for a video output thread matching the current
  72  * properties. If not found, it spawns a new one.
  73  *****************************************************************************/
  74 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  75                                  unsigned int i_width, unsigned int i_height,
  76                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  77 {
  78     if( !i_width || !i_height || !i_chroma )
  79     {
  80         /* Reattach video output to input before bailing out */
  81         if( p_vout )
  82         {
  83             vlc_object_t *p_playlist;
  84
  85             p_playlist = vlc_object_find( p_this,
  86                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
  87
  88             if( p_playlist )
  89             {
  90                 vlc_object_detach( p_vout );
  91                 vlc_object_attach( p_vout, p_playlist );
  92
  93                 vlc_object_release( p_playlist );
  94             }
  95             else
  96             {
  97                 msg_Dbg( p_this, "cannot find playlist destroying vout" );
  98                 vlc_object_detach( p_vout );
  99                 vout_Destroy( p_vout );
 100             }
 101         }
 102         return NULL;
 103     }
 104
 105     /* If a video output was provided, lock it, otherwise look for one. */
 106     if( p_vout )
 107     {
 108         vlc_object_yield( p_vout );
 109     }
 110     else
 111     {
 112         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 113
 114         if( !p_vout )
 115         {
 116             vlc_object_t *p_playlist;
 117
 118             p_playlist = vlc_object_find( p_this,
 119                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 120             if( p_playlist )
 121             {
 122                 p_vout = vlc_object_find( p_playlist,
 123                                           VLC_OBJECT_VOUT, FIND_CHILD );
 124                 /* only first children of p_input for unused vout */
 125                 if( p_vout && p_vout->p_parent != p_playlist )
 126                 {
 127                     vlc_object_release( p_vout );
 128                     p_vout = NULL;
 129                 }
 130                 vlc_object_release( p_playlist );
 131             }
 132         }
 133     }
 134
 135     /* If we now have a video output, check it has the right properties */
 136     if( p_vout )
 137     {
 138         char *psz_filter_chain;
 139
 140         /* We don't directly check for the "filter" variable for obvious
 141          * performance reasons. */
 142         if( p_vout->b_filter_change )
 143         {
 144             psz_filter_chain = config_GetPsz( p_this, "filter" );
 145
 146             if( psz_filter_chain && !*psz_filter_chain )
 147             {
 148                 free( psz_filter_chain );
 149                 psz_filter_chain = NULL;
 150             }
 151             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 152             {
 153                 free( p_vout->psz_filter_chain );
 154                 p_vout->psz_filter_chain = NULL;
 155             }
 156
 157             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 158                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 159                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 160             {
 161                 p_vout->b_filter_change = VLC_FALSE;
 162             }
 163
 164             if( psz_filter_chain ) free( psz_filter_chain );
 165         }
 166
 167         if( ( p_vout->render.i_width != i_width ) ||
 168             ( p_vout->render.i_height != i_height ) ||
 169             ( p_vout->render.i_chroma != i_chroma ) ||
 170             ( p_vout->render.i_aspect != i_aspect
 171                     && !p_vout->b_override_aspect ) ||
 172             p_vout->b_filter_change )
 173         {
 174             /* We are not interested in this format, close this vout */
 175             vlc_object_detach( p_vout );
 176             vlc_object_release( p_vout );
 177             vout_Destroy( p_vout );
 178             p_vout = NULL;
 179         }
 180         else
 181         {
 182             /* This video output is cool! Hijack it. */
 183             vlc_object_detach( p_vout );
 184             vlc_object_attach( p_vout, p_this );
 185             vlc_object_release( p_vout );
 186         }
 187     }
 188
 189     if( !p_vout )
 190     {
 191         msg_Dbg( p_this, "no usable vout present, spawning one" );
 192
 193         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 194     }
 195
 196     return p_vout;
 197 }
 198
 199 /*****************************************************************************
 200  * vout_Create: creates a new video output thread
 201  *****************************************************************************
 202  * This function creates a new video output thread, and returns a pointer
 203  * to its description. On error, it returns NULL.
 204  *****************************************************************************/
 205 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 206                                unsigned int i_width, unsigned int i_height,
 207                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 208 {
 209     vout_thread_t  * p_vout;                            /* thread descriptor */
 210     input_thread_t * p_input_thread;
 211     int              i_index;                               /* loop variable */
 212     char           * psz_plugin;
 213     vlc_value_t      val, text;
 214
 215     /* Allocate descriptor */
 216     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 217     if( p_vout == NULL )
 218     {
 219         msg_Err( p_parent, "out of memory" );
 220         return NULL;
 221     }
 222
 223     /* Initialize pictures and subpictures - translation tables and functions
 224      * will be initialized later in InitThread */
 225     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
 226     {
 227         p_vout->p_picture[i_index].pf_lock = NULL;
 228         p_vout->p_picture[i_index].pf_unlock = NULL;
 229         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 230         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 231     }
 232
 233     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 234     {
 235         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 236         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 237     }
 238
 239     /* No images in the heap */
 240     p_vout->i_heap_size = 0;
 241
 242     /* Initialize the rendering heap */
 243     I_RENDERPICTURES = 0;
 244     p_vout->render.i_width    = i_width;
 245     p_vout->render.i_height   = i_height;
 246     p_vout->render.i_chroma   = i_chroma;
 247     p_vout->render.i_aspect   = i_aspect;
 248
 249     p_vout->render.i_rmask    = 0;
 250     p_vout->render.i_gmask    = 0;
 251     p_vout->render.i_bmask    = 0;
 252
 253     p_vout->render.i_last_used_pic = -1;
 254     p_vout->render.b_allow_modify_pics = 1;
 255
 256     /* Zero the output heap */
 257     I_OUTPUTPICTURES = 0;
 258     p_vout->output.i_width    = 0;
 259     p_vout->output.i_height   = 0;
 260     p_vout->output.i_chroma   = 0;
 261     p_vout->output.i_aspect   = 0;
 262
 263     p_vout->output.i_rmask    = 0;
 264     p_vout->output.i_gmask    = 0;
 265     p_vout->output.i_bmask    = 0;
 266
 267     /* Initialize misc stuff */
 268     p_vout->i_changes    = 0;
 269     p_vout->f_gamma      = 0;
 270     p_vout->b_grayscale  = 0;
 271     p_vout->b_info       = 0;
 272     p_vout->b_interface  = 0;
 273     p_vout->b_scale      = 1;
 274     p_vout->b_fullscreen = 0;
 275     p_vout->i_alignment  = 0;
 276     p_vout->render_time  = 10;
 277     p_vout->c_fps_samples = 0;
 278     p_vout->b_filter_change = 0;
 279
 280     /* Mouse coordinates */
 281     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 282     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 283     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 284     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 285     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 286
 287     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 288     val.b_bool = VLC_TRUE;
 289     var_Set( p_vout, "intf-change", val );
 290
 291     /* Initialize locks */
 292     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 293     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 294     vlc_mutex_init( p_vout, &p_vout->change_lock );
 295
 296     /* Attach the new object now so we can use var inheritance below */
 297     vlc_object_attach( p_vout, p_parent );
 298
 299     /* Create a few object variables we'll need later on */
 300     var_Create( p_vout, "aspect-ratio", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 301     var_Create( p_vout, "width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 302     var_Create( p_vout, "height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 303     var_Create( p_vout, "zoom", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 304     var_Create( p_vout, "align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 305
 306     p_vout->b_override_aspect = VLC_FALSE;
 307
 308     /* If the parent is not a VOUT object, that means we are at the start of
 309      * the video output pipe */
 310     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 311     {
 312         var_Get( p_vout, "aspect-ratio", &val );
 313
 314         /* Check whether the user tried to override aspect ratio */
 315         if( val.psz_string )
 316         {
 317             unsigned int i_new_aspect = i_aspect;
 318             char *psz_parser = strchr( val.psz_string, ':' );
 319
 320             if( psz_parser )
 321             {
 322                 *psz_parser++ = '\0';
 323                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 324                                                       / atoi( psz_parser );
 325             }
 326             else
 327             {
 328                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 329                                        * atof( val.psz_string )
 330                                        / i_height;
 331             }
 332
 333             free( val.psz_string );
 334
 335             if( i_new_aspect && i_new_aspect != i_aspect )
 336             {
 337                 int i_pgcd = ReduceHeight( i_new_aspect );
 338
 339                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 340                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 341
 342                 p_vout->render.i_aspect = i_new_aspect;
 343
 344                 p_vout->b_override_aspect = VLC_TRUE;
 345             }
 346         }
 347
 348         /* Look for the default filter configuration */
 349         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 350         var_Get( p_vout, "filter", &val );
 351         p_vout->psz_filter_chain = val.psz_string;
 352     }
 353     else
 354     {
 355         /* continue the parent's filter chain */
 356         char *psz_end;
 357
 358         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 359         if( psz_end && *(psz_end+1) )
 360             p_vout->psz_filter_chain = strdup( psz_end+1 );
 361         else p_vout->psz_filter_chain = NULL;
 362     }
 363
 364     /* Choose the video output module */
 365     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 366     {
 367         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 368         var_Get( p_vout, "vout", &val );
 369         psz_plugin = val.psz_string;
 370     }
 371     else
 372     {
 373         /* the filter chain is a string list of filters separated by double
 374          * colons */
 375         char *psz_end;
 376
 377         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 378         if( psz_end )
 379             psz_plugin = strndup( p_vout->psz_filter_chain,
 380                                   psz_end - p_vout->psz_filter_chain );
 381         else psz_plugin = strdup( p_vout->psz_filter_chain );
 382     }
 383
 384     /* Initialize the dimensions of the video window */
 385     InitWindowSize( p_vout, &p_vout->i_window_width,
 386                     &p_vout->i_window_height );
 387
 388     /* Create the vout thread */
 389     p_vout->p_module = module_Need( p_vout,
 390                            ( p_vout->psz_filter_chain &&
 391                                *p_vout->psz_filter_chain ) ?
 392                            "video filter" : "video output",
 393                            psz_plugin );
 394
 395     if( psz_plugin ) free( psz_plugin );
 396     if( p_vout->p_module == NULL )
 397     {
 398         msg_Err( p_vout, "no suitable vout module" );
 399         vlc_object_destroy( p_vout );
 400         return NULL;
 401     }
 402
 403     p_vout->p_text_renderer_module = module_Need( p_vout, "text renderer",
 404                                                   NULL );
 405     if( p_vout->p_text_renderer_module == NULL )
 406     {
 407         msg_Warn( p_vout, "no suitable text renderer module" );
 408         p_vout->pf_add_string = NULL;
 409     }
 410
 411     /* Create a few object variables for interface interaction */
 412     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
 413     text.psz_string = _("Fullscreen");
 414     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 415     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
 416     if( val.b_bool )
 417     {
 418         /* user requested fullscreen */
 419         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 420     }
 421     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 422
 423     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 424     text.psz_string = _("Deinterlace");
 425     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 426     val.psz_string = ""; text.psz_string = _("Disable");
 427     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 428     val.psz_string = "discard"; text.psz_string = _("Discard");
 429     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 430     val.psz_string = "blend"; text.psz_string = _("Blend");
 431     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 432     val.psz_string = "mean"; text.psz_string = _("Mean");
 433     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 434     val.psz_string = "bob"; text.psz_string = _("Bob");
 435     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 436     val.psz_string = "linear"; text.psz_string = _("Linear");
 437     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 438     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 439     {
 440         var_Set( p_vout, "deinterlace", val );
 441         if( val.psz_string ) free( val.psz_string );
 442     }
 443     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 444
 445
 446     var_Create( p_vout, "filter", VLC_VAR_STRING );
 447     text.psz_string = _("Filters");
 448     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 449     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 450     if( val.psz_string )
 451     {
 452         var_Set( p_vout, "filter", val );
 453         free( val.psz_string );
 454     }
 455     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 456
 457     /* Calculate delay created by internal caching */
 458     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 459                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 460     if( p_input_thread )
 461     {
 462         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 463         vlc_object_release( p_input_thread );
 464     }
 465     else
 466     {
 467         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 468     }
 469
 470     if( vlc_thread_create( p_vout, "video output", RunThread,
 471                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 472     {
 473         msg_Err( p_vout, "out of memory" );
 474         module_Unneed( p_vout, p_vout->p_module );
 475         vlc_object_destroy( p_vout );
 476         return NULL;
 477     }
 478
 479     return p_vout;
 480 }
 481
 482 /*****************************************************************************
 483  * vout_Destroy: destroys a previously created video output
 484  *****************************************************************************
 485  * Destroy a terminated thread.
 486  * The function will request a destruction of the specified thread. If pi_error
 487  * is NULL, it will return once the thread is destroyed. Else, it will be
 488  * update using one of the THREAD_* constants.
 489  *****************************************************************************/
 490 void vout_Destroy( vout_thread_t *p_vout )
 491 {
 492     vlc_object_t *p_playlist;
 493
 494     /* Request thread destruction */
 495     p_vout->b_die = VLC_TRUE;
 496     vlc_thread_join( p_vout );
 497
 498     var_Destroy( p_vout, "intf-change" );
 499
 500     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 501                                   FIND_ANYWHERE );
 502
 503     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 504
 505     /* Free structure */
 506     vlc_object_destroy( p_vout );
 507
 508     /* If it was the last vout, tell the interface to show up */
 509     if( p_playlist != NULL )
 510     {
 511         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 512                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 513         if( p_another_vout == NULL )
 514         {
 515             vlc_value_t val;
 516             val.b_bool = VLC_TRUE;
 517             var_Set( p_playlist, "intf-show", val );
 518         }
 519         else
 520         {
 521             vlc_object_release( p_another_vout );
 522         }
 523         vlc_object_release( p_playlist );
 524     }
 525 }
 526
 527 /*****************************************************************************
 528  * InitThread: initialize video output thread
 529  *****************************************************************************
 530  * This function is called from RunThread and performs the second step of the
 531  * initialization. It returns 0 on success. Note that the thread's flag are not
 532  * modified inside this function.
 533  *****************************************************************************/
 534 static int InitThread( vout_thread_t *p_vout )
 535 {
 536     int i, i_pgcd;
 537
 538     vlc_mutex_lock( &p_vout->change_lock );
 539
 540 #ifdef STATS
 541     p_vout->c_loops = 0;
 542 #endif
 543
 544     /* Initialize output method, it allocates direct buffers for us */
 545     if( p_vout->pf_init( p_vout ) )
 546     {
 547         vlc_mutex_unlock( &p_vout->change_lock );
 548         return VLC_EGENERIC;
 549     }
 550
 551     if( !I_OUTPUTPICTURES )
 552     {
 553         msg_Err( p_vout, "plugin was unable to allocate at least "
 554                          "one direct buffer" );
 555         p_vout->pf_end( p_vout );
 556         vlc_mutex_unlock( &p_vout->change_lock );
 557         return VLC_EGENERIC;
 558     }
 559
 560     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 561     {
 562         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 563                          "our internal buffers must have overflown." );
 564         p_vout->pf_end( p_vout );
 565         vlc_mutex_unlock( &p_vout->change_lock );
 566         return VLC_EGENERIC;
 567     }
 568
 569     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 570
 571 #if 0
 572     if( !p_vout->psz_filter_chain )
 573     {
 574         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 575
 576         if( psz_aspect )
 577         {
 578             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 579                                                       * atof( psz_aspect )
 580                                                       / p_vout->output.i_height;
 581             free( psz_aspect );
 582
 583             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 584             {
 585                 int i_pgcd = ReduceHeight( i_new_aspect );
 586                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 587                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 588                 p_vout->output.i_aspect = i_new_aspect;
 589             }
 590         }
 591     }
 592 #endif
 593
 594     i_pgcd = ReduceHeight( p_vout->render.i_aspect );
 595     msg_Dbg( p_vout,
 596              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 597              p_vout->render.i_width, p_vout->render.i_height,
 598              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 599              p_vout->render.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 600
 601     i_pgcd = ReduceHeight( p_vout->output.i_aspect );
 602     msg_Dbg( p_vout,
 603              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 604              p_vout->output.i_width, p_vout->output.i_height,
 605              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 606              p_vout->output.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 607
 608     /* Calculate shifts from system-updated masks */
 609     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 610                  p_vout->output.i_rmask );
 611     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 612                  p_vout->output.i_gmask );
 613     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 614                  p_vout->output.i_bmask );
 615
 616     /* Check whether we managed to create direct buffers similar to
 617      * the render buffers, ie same size and chroma */
 618     if( ( p_vout->output.i_width == p_vout->render.i_width )
 619      && ( p_vout->output.i_height == p_vout->render.i_height )
 620      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 621     {
 622         /* Cool ! We have direct buffers, we can ask the decoder to
 623          * directly decode into them ! Map the first render buffers to
 624          * the first direct buffers, but keep the first direct buffer
 625          * for memcpy operations */
 626         p_vout->b_direct = 1;
 627
 628         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 629         {
 630             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 631                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 632                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 633             {
 634                 /* We have enough direct buffers so there's no need to
 635                  * try to use system memory buffers. */
 636                 break;
 637             }
 638             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 639             I_RENDERPICTURES++;
 640         }
 641
 642         msg_Dbg( p_vout, "direct render, mapping "
 643                  "render pictures 0-%i to system pictures 1-%i",
 644                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 645     }
 646     else
 647     {
 648         /* Rats... Something is wrong here, we could not find an output
 649          * plugin able to directly render what we decode. See if we can
 650          * find a chroma plugin to do the conversion */
 651         p_vout->b_direct = 0;
 652
 653         /* Choose the best module */
 654         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
 655
 656         if( p_vout->chroma.p_module == NULL )
 657         {
 658             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 659                      (char*)&p_vout->render.i_chroma,
 660                      (char*)&p_vout->output.i_chroma );
 661             p_vout->pf_end( p_vout );
 662             vlc_mutex_unlock( &p_vout->change_lock );
 663             return VLC_EGENERIC;
 664         }
 665
 666         msg_Dbg( p_vout, "indirect render, mapping "
 667                  "render pictures 0-%i to system pictures %i-%i",
 668                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 669                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 670
 671         /* Append render buffers after the direct buffers */
 672         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 673         {
 674             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 675             I_RENDERPICTURES++;
 676
 677             /* Check if we have enough render pictures */
 678             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 679                 break;
 680         }
 681     }
 682
 683     /* Link pictures back to their heap */
 684     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 685     {
 686         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 687     }
 688
 689     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 690     {
 691         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 692     }
 693
 694 /* XXX XXX mark thread ready */
 695     return VLC_SUCCESS;
 696 }
 697
 698 /*****************************************************************************
 699  * RunThread: video output thread
 700  *****************************************************************************
 701  * Video output thread. This function does only returns when the thread is
 702  * terminated. It handles the pictures arriving in the video heap and the
 703  * display device events.
 704  *****************************************************************************/
 705 static void RunThread( vout_thread_t *p_vout)
 706 {
 707     int             i_index;                                /* index in heap */
 708     int             i_idle_loops = 0;  /* loops without displaying a picture */
 709     mtime_t         current_date;                            /* current date */
 710     mtime_t         display_date;                            /* display date */
 711
 712     picture_t *     p_picture;                            /* picture pointer */
 713     picture_t *     p_last_picture = NULL;                   /* last picture */
 714     picture_t *     p_directbuffer;              /* direct buffer to display */
 715
 716     subpicture_t *  p_subpic;                          /* subpicture pointer */
 717
 718     /*
 719      * Initialize thread
 720      */
 721     p_vout->b_error = InitThread( p_vout );
 722
 723     /* signal the creation of the vout */
 724     vlc_thread_ready( p_vout );
 725
 726     if( p_vout->b_error )
 727     {
 728         /* Destroy thread structures allocated by Create and InitThread */
 729         DestroyThread( p_vout );
 730         return;
 731     }
 732
 733     /*
 734      * Main loop - it is not executed if an error occured during
 735      * initialization
 736      */
 737     while( (!p_vout->b_die) && (!p_vout->b_error) )
 738     {
 739         /* Initialize loop variables */
 740         p_picture = NULL;
 741         display_date = 0;
 742         current_date = mdate();
 743
 744 #if 0
 745         p_vout->c_loops++;
 746         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 747         {
 748             msg_Dbg( p_vout, "picture heap: %d/%d",
 749                      I_RENDERPICTURES, p_vout->i_heap_size );
 750         }
 751 #endif
 752
 753         /*
 754          * Find the picture to display (the one with the earliest date).
 755          * This operation does not need lock, since only READY_PICTUREs
 756          * are handled. */
 757         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 758         {
 759             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 760                 && ( (p_picture == NULL) ||
 761                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 762             {
 763                 p_picture = PP_RENDERPICTURE[i_index];
 764                 display_date = p_picture->date;
 765             }
 766         }
 767
 768         if( p_picture )
 769         {
 770             /* If we met the last picture, parse again to see whether there is
 771              * a more appropriate one. */
 772             if( p_picture == p_last_picture )
 773             {
 774                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 775                 {
 776                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 777                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 778                         && ((p_picture == p_last_picture) ||
 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
 787             /* If we found better than the last picture, destroy it */
 788             if( p_last_picture && p_picture != p_last_picture )
 789             {
 790                 vlc_mutex_lock( &p_vout->picture_lock );
 791                 if( p_last_picture->i_refcount )
 792                 {
 793                     p_last_picture->i_status = DISPLAYED_PICTURE;
 794                 }
 795                 else
 796                 {
 797                     p_last_picture->i_status = DESTROYED_PICTURE;
 798                     p_vout->i_heap_size--;
 799                 }
 800                 vlc_mutex_unlock( &p_vout->picture_lock );
 801                 p_last_picture = NULL;
 802             }
 803
 804             /* Compute FPS rate */
 805             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 806                 = display_date;
 807
 808             if( !p_picture->b_force &&
 809                 p_picture != p_last_picture &&
 810                 display_date < current_date + p_vout->render_time )
 811             {
 812                 /* Picture is late: it will be destroyed and the thread
 813                  * will directly choose the next picture */
 814                 vlc_mutex_lock( &p_vout->picture_lock );
 815                 if( p_picture->i_refcount )
 816                 {
 817                     /* Pretend we displayed the picture, but don't destroy
 818                      * it since the decoder might still need it. */
 819                     p_picture->i_status = DISPLAYED_PICTURE;
 820                 }
 821                 else
 822                 {
 823                     /* Destroy the picture without displaying it */
 824                     p_picture->i_status = DESTROYED_PICTURE;
 825                     p_vout->i_heap_size--;
 826                 }
 827                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 828                                   current_date - display_date );
 829                 vlc_mutex_unlock( &p_vout->picture_lock );
 830
 831                 continue;
 832             }
 833
 834             if( display_date >
 835                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 836             {
 837                 /* Picture is waaay too early: it will be destroyed */
 838                 vlc_mutex_lock( &p_vout->picture_lock );
 839                 if( p_picture->i_refcount )
 840                 {
 841                     /* Pretend we displayed the picture, but don't destroy
 842                      * it since the decoder might still need it. */
 843                     p_picture->i_status = DISPLAYED_PICTURE;
 844                 }
 845                 else
 846                 {
 847                     /* Destroy the picture without displaying it */
 848                     p_picture->i_status = DESTROYED_PICTURE;
 849                     p_vout->i_heap_size--;
 850                 }
 851                 msg_Warn( p_vout, "vout warning: early picture skipped "
 852                           "("I64Fd")", display_date - current_date
 853                           - p_vout->i_pts_delay );
 854                 vlc_mutex_unlock( &p_vout->picture_lock );
 855
 856                 continue;
 857             }
 858
 859             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 860             {
 861                 /* A picture is ready to be rendered, but its rendering date
 862                  * is far from the current one so the thread will perform an
 863                  * empty loop as if no picture were found. The picture state
 864                  * is unchanged */
 865                 p_picture    = NULL;
 866                 display_date = 0;
 867             }
 868             else if( p_picture == p_last_picture )
 869             {
 870                 /* We are asked to repeat the previous picture, but we first
 871                  * wait for a couple of idle loops */
 872                 if( i_idle_loops < 4 )
 873                 {
 874                     p_picture    = NULL;
 875                     display_date = 0;
 876                 }
 877                 else
 878                 {
 879                     /* We set the display date to something high, otherwise
 880                      * we'll have lots of problems with late pictures */
 881                     display_date = current_date + p_vout->render_time;
 882                 }
 883             }
 884         }
 885
 886         if( p_picture == NULL )
 887         {
 888             i_idle_loops++;
 889         }
 890
 891         /*
 892          * Check for subpictures to display
 893          */
 894         p_subpic = vout_SortSubPictures( p_vout, display_date );
 895
 896         /*
 897          * Perform rendering
 898          */
 899         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 900
 901         /*
 902          * Call the plugin-specific rendering method if there is one
 903          */
 904         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 905         {
 906             /* Render the direct buffer returned by vout_RenderPicture */
 907             p_vout->pf_render( p_vout, p_directbuffer );
 908         }
 909
 910         /*
 911          * Sleep, wake up
 912          */
 913         if( display_date != 0 && p_directbuffer != NULL )
 914         {
 915             mtime_t current_render_time = mdate() - current_date;
 916             /* if render time is very large we don't include it in the mean */
 917             if( current_render_time < p_vout->render_time +
 918                 VOUT_DISPLAY_DELAY )
 919             {
 920                 /* Store render time using a sliding mean weighting to
 921                  * current value in a 3 to 1 ratio*/
 922                 p_vout->render_time *= 3;
 923                 p_vout->render_time += current_render_time;
 924                 p_vout->render_time >>= 2;
 925             }
 926         }
 927
 928         /* Give back change lock */
 929         vlc_mutex_unlock( &p_vout->change_lock );
 930
 931         /* Sleep a while or until a given date */
 932         if( display_date != 0 )
 933         {
 934             /* If there are filters in the chain, better give them the picture
 935              * in advance */
 936             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 937             {
 938                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 939             }
 940         }
 941         else
 942         {
 943             msleep( VOUT_IDLE_SLEEP );
 944         }
 945
 946         /* On awakening, take back lock and send immediately picture
 947          * to display. */
 948         vlc_mutex_lock( &p_vout->change_lock );
 949
 950         /*
 951          * Display the previously rendered picture
 952          */
 953         if( p_picture != NULL && p_directbuffer != NULL )
 954         {
 955             /* Display the direct buffer returned by vout_RenderPicture */
 956             if( p_vout->pf_display )
 957             {
 958                 p_vout->pf_display( p_vout, p_directbuffer );
 959             }
 960
 961             /* Reinitialize idle loop count */
 962             i_idle_loops = 0;
 963
 964             /* Tell the vout this was the last picture and that it does not
 965              * need to be forced anymore. */
 966             p_last_picture = p_picture;
 967             p_last_picture->b_force = 0;
 968         }
 969
 970         /*
 971          * Check events and manage thread
 972          */
 973         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 974         {
 975             /* A fatal error occured, and the thread must terminate
 976              * immediately, without displaying anything - setting b_error to 1
 977              * causes the immediate end of the main while() loop. */
 978             p_vout->b_error = 1;
 979         }
 980
 981         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 982         {
 983             /* this must only happen when the vout plugin is incapable of
 984              * rescaling the picture itself. In this case we need to destroy
 985              * the current picture buffers and recreate new ones with the right
 986              * dimensions */
 987             int i;
 988
 989             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 990
 991             p_vout->pf_end( p_vout );
 992             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 993                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 994
 995             I_OUTPUTPICTURES = 0;
 996             if( p_vout->pf_init( p_vout ) )
 997             {
 998                 msg_Err( p_vout, "cannot resize display" );
 999                 /* FIXME: pf_end will be called again in EndThread() */
1000                 p_vout->b_error = 1;
1001             }
1002
1003             /* Need to reinitialise the chroma plugin */
1004             if( p_vout->chroma.p_module )
1005             {
1006                 if( p_vout->chroma.p_module->pf_deactivate )
1007                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1008                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1009             }
1010         }
1011
1012         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1013         {
1014             /* This happens when the picture buffers need to be recreated.
1015              * This is useful on multimonitor displays for instance.
1016              *
1017              * Warning: This only works when the vout creates only 1 picture
1018              * buffer!! */
1019             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1020
1021             if( !p_vout->b_direct )
1022             {
1023                 module_Unneed( p_vout, p_vout->chroma.p_module );
1024             }
1025
1026             vlc_mutex_lock( &p_vout->picture_lock );
1027
1028             p_vout->pf_end( p_vout );
1029
1030             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1031
1032             p_vout->b_error = InitThread( p_vout );
1033
1034             vlc_mutex_unlock( &p_vout->picture_lock );
1035         }
1036     }
1037
1038     /*
1039      * Error loop - wait until the thread destruction is requested
1040      */
1041     if( p_vout->b_error )
1042     {
1043         ErrorThread( p_vout );
1044     }
1045
1046     /* End of thread */
1047     EndThread( p_vout );
1048
1049     /* Destroy thread structures allocated by CreateThread */
1050     DestroyThread( p_vout );
1051 }
1052
1053 /*****************************************************************************
1054  * ErrorThread: RunThread() error loop
1055  *****************************************************************************
1056  * This function is called when an error occured during thread main's loop. The
1057  * thread can still receive feed, but must be ready to terminate as soon as
1058  * possible.
1059  *****************************************************************************/
1060 static void ErrorThread( vout_thread_t *p_vout )
1061 {
1062     /* Wait until a `die' order */
1063     while( !p_vout->b_die )
1064     {
1065         /* Sleep a while */
1066         msleep( VOUT_IDLE_SLEEP );
1067     }
1068 }
1069
1070 /*****************************************************************************
1071  * EndThread: thread destruction
1072  *****************************************************************************
1073  * This function is called when the thread ends after a sucessful
1074  * initialization. It frees all ressources allocated by InitThread.
1075  *****************************************************************************/
1076 static void EndThread( vout_thread_t *p_vout )
1077 {
1078     int     i_index;                                        /* index in heap */
1079
1080 #ifdef STATS
1081     {
1082         struct tms cpu_usage;
1083         times( &cpu_usage );
1084
1085         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1086                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1087     }
1088 #endif
1089
1090     if( !p_vout->b_direct )
1091     {
1092         module_Unneed( p_vout, p_vout->chroma.p_module );
1093     }
1094
1095     /* Destroy all remaining pictures */
1096     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1097     {
1098         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1099         {
1100             free( p_vout->p_picture[i_index].p_data_orig );
1101         }
1102     }
1103
1104     /* Destroy all remaining subpictures */
1105     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1106     {
1107         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1108         {
1109             vout_DestroySubPicture( p_vout,
1110                                     &p_vout->p_subpicture[i_index] );
1111         }
1112     }
1113
1114     if( p_vout->p_text_renderer_module )
1115         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1116
1117     /* Destroy translation tables */
1118     p_vout->pf_end( p_vout );
1119
1120     /* Release the change lock */
1121     vlc_mutex_unlock( &p_vout->change_lock );
1122 }
1123
1124 /*****************************************************************************
1125  * DestroyThread: thread destruction
1126  *****************************************************************************
1127  * This function is called when the thread ends. It frees all ressources
1128  * allocated by CreateThread. Status is available at this stage.
1129  *****************************************************************************/
1130 static void DestroyThread( vout_thread_t *p_vout )
1131 {
1132     /* Destroy the locks */
1133     vlc_mutex_destroy( &p_vout->picture_lock );
1134     vlc_mutex_destroy( &p_vout->subpicture_lock );
1135     vlc_mutex_destroy( &p_vout->change_lock );
1136
1137     /* Release the module */
1138     module_Unneed( p_vout, p_vout->p_module );
1139 }
1140
1141 /* following functions are local */
1142
1143 static int ReduceHeight( int i_ratio )
1144 {
1145     int i_dummy = VOUT_ASPECT_FACTOR;
1146     int i_pgcd  = 1;
1147
1148     if( !i_ratio )
1149     {
1150         return i_pgcd;
1151     }
1152
1153     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1154     while( !(i_ratio & 1) && !(i_dummy & 1) )
1155     {
1156         i_ratio >>= 1;
1157         i_dummy >>= 1;
1158         i_pgcd  <<= 1;
1159     }
1160
1161     while( !(i_ratio % 3) && !(i_dummy % 3) )
1162     {
1163         i_ratio /= 3;
1164         i_dummy /= 3;
1165         i_pgcd  *= 3;
1166     }
1167
1168     while( !(i_ratio % 5) && !(i_dummy % 5) )
1169     {
1170         i_ratio /= 5;
1171         i_dummy /= 5;
1172         i_pgcd  *= 5;
1173     }
1174
1175     return i_pgcd;
1176 }
1177
1178 /*****************************************************************************
1179  * BinaryLog: computes the base 2 log of a binary value
1180  *****************************************************************************
1181  * This functions is used by MaskToShift, to get a bit index from a binary
1182  * value.
1183  *****************************************************************************/
1184 static int BinaryLog( uint32_t i )
1185 {
1186     int i_log = 0;
1187
1188     if( i == 0 ) return -31337;
1189
1190     if( i & 0xffff0000 ) i_log += 16;
1191     if( i & 0xff00ff00 ) i_log += 8;
1192     if( i & 0xf0f0f0f0 ) i_log += 4;
1193     if( i & 0xcccccccc ) i_log += 2;
1194     if( i & 0xaaaaaaaa ) i_log += 1;
1195
1196     return i_log;
1197 }
1198
1199 /*****************************************************************************
1200  * MaskToShift: transform a color mask into right and left shifts
1201  *****************************************************************************
1202  * This function is used for obtaining color shifts from masks.
1203  *****************************************************************************/
1204 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1205 {
1206     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1207
1208     if( !i_mask )
1209     {
1210         *pi_left = *pi_right = 0;
1211         return;
1212     }
1213
1214     /* Get bits */
1215     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1216     i_high = i_mask + i_low;                       /* higher bit of the mask */
1217
1218     /* Transform bits into an index */
1219     i_low =  BinaryLog (i_low);
1220     i_high = BinaryLog (i_high);
1221
1222     /* Update pointers and return */
1223     *pi_left =   i_low;
1224     *pi_right = (8 - i_high + i_low);
1225 }
1226
1227 /*****************************************************************************
1228  * InitWindowSize: find the initial dimensions the video window should have.
1229  *****************************************************************************
1230  * This function will check the "width", "height" and "zoom" config options and
1231  * will calculate the size that the video window should have.
1232  *****************************************************************************/
1233 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1234                             int *pi_height )
1235 {
1236     vlc_value_t val;
1237     int i_width, i_height;
1238     uint64_t ll_zoom;
1239
1240 #define FP_FACTOR 1000                             /* our fixed point factor */
1241
1242     var_Get( p_vout, "align", &val );
1243     p_vout->i_alignment = val.i_int;
1244
1245     var_Get( p_vout, "width", &val );
1246     i_width = val.i_int;
1247     var_Get( p_vout, "height", &val );
1248     i_height = val.i_int;
1249     var_Get( p_vout, "zoom", &val );
1250     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1251
1252     if( i_width > 0 && i_height > 0)
1253     {
1254         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1255         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1256         return;
1257     }
1258     else if( i_width > 0 )
1259     {
1260         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1261         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1262                             p_vout->render.i_aspect / FP_FACTOR );
1263         return;
1264     }
1265     else if( i_height > 0 )
1266     {
1267         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1268         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1269                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1270         return;
1271     }
1272
1273     if( p_vout->render.i_height * p_vout->render.i_aspect
1274         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1275     {
1276         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1277           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1278         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1279     }
1280     else
1281     {
1282         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1283         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1284           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1285     }
1286
1287 #undef FP_FACTOR
1288 }
1289
1290 /*****************************************************************************
1291  * vout_VarCallback: generic callback for intf variables
1292  *****************************************************************************/
1293 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1294                       vlc_value_t old_value, vlc_value_t new_value,
1295                       void * unused )
1296 {
1297     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1298     vlc_value_t val;
1299     val.b_bool = VLC_TRUE;
1300     var_Set( p_vout, "intf-change", val );
1301     return VLC_SUCCESS;
1302 }
1303
1304 /*****************************************************************************
1305  * object variables callbacks: a bunch of object variables are used by the
1306  * interfaces to interact with the vout.
1307  *****************************************************************************/
1308 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
1309                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1310 {
1311     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1312     input_thread_t *p_input;
1313     vlc_value_t val;
1314
1315     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
1316
1317     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1318                                                  FIND_PARENT );
1319     if( p_input )
1320     {
1321         /* Modify input as well because the vout might have to be restarted */
1322         var_Create( p_input, "fullscreen", VLC_VAR_BOOL );
1323         var_Set( p_input, "fullscreen", newval );
1324
1325         vlc_object_release( p_input );
1326     }
1327
1328     val.b_bool = VLC_TRUE;
1329     var_Set( p_vout, "intf-change", val );
1330     return VLC_SUCCESS;
1331 }
1332
1333 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1334                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1335 {
1336     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1337     input_thread_t *p_input;
1338     vlc_value_t val;
1339
1340     char *psz_mode = newval.psz_string;
1341     char *psz_filter;
1342     unsigned int  i;
1343
1344     psz_filter = config_GetPsz( p_vout, "filter" );
1345
1346     if( !psz_mode || !*psz_mode )
1347     {
1348         config_PutPsz( p_vout, "filter", "" );
1349     }
1350     else
1351     {
1352         if( !psz_filter || !*psz_filter )
1353         {
1354             config_PutPsz( p_vout, "filter", "deinterlace" );
1355         }
1356         else
1357         {
1358             if( strstr( psz_filter, "deinterlace" ) == NULL )
1359             {
1360                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1361                 strcat( psz_filter, ",deinterlace" );
1362             }
1363             config_PutPsz( p_vout, "filter", psz_filter );
1364         }
1365     }
1366
1367     if( psz_filter ) free( psz_filter );
1368
1369
1370     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1371                                                  FIND_PARENT );
1372     if( !p_input ) return VLC_EGENERIC;
1373
1374     if( psz_mode && *psz_mode )
1375     {
1376         val.psz_string = psz_mode;
1377         var_Set( p_vout, "deinterlace-mode", val );
1378         /* Modify input as well because the vout might have to be restarted */
1379         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1380         var_Set( p_input, "deinterlace-mode", val );
1381     }
1382
1383     /* now restart all video streams */
1384     vlc_mutex_lock( &p_input->stream.stream_lock );
1385
1386     p_vout->b_filter_change = VLC_TRUE;
1387
1388 #define ES p_input->stream.pp_es[i]
1389
1390     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1391     {
1392         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1393         {
1394             input_UnselectES( p_input, ES );
1395             input_SelectES( p_input, ES );
1396         }
1397 #undef ES
1398     }
1399     vlc_mutex_unlock( &p_input->stream.stream_lock );
1400
1401     vlc_object_release( p_input );
1402
1403     val.b_bool = VLC_TRUE;
1404     var_Set( p_vout, "intf-change", val );
1405     return VLC_SUCCESS;
1406 }
1407
1408 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1409                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1410 {
1411     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1412     input_thread_t *p_input;
1413     vlc_value_t val;
1414     unsigned int i;
1415
1416     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1417                                                  FIND_PARENT );
1418
1419     if (!p_input)
1420     {
1421         msg_Err( p_vout, "Input not found" );
1422         return( VLC_EGENERIC );
1423     }
1424     /* Restart the video stream */
1425     vlc_mutex_lock( &p_input->stream.stream_lock );
1426
1427     p_vout->b_filter_change = VLC_TRUE;
1428
1429 #define ES p_input->stream.pp_es[i]
1430
1431     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1432     {
1433         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1434         {
1435             input_UnselectES( p_input, ES );
1436             input_SelectES( p_input, ES );
1437         }
1438 #undef ES
1439     }
1440     vlc_mutex_unlock( &p_input->stream.stream_lock );
1441
1442     vlc_object_release( p_input );
1443
1444     val.b_bool = VLC_TRUE;
1445     var_Set( p_vout, "intf-change", val );
1446     return VLC_SUCCESS;
1447 }
1448