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 1.225 2003/05/25 11:31:54 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 "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
  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_input;
  82             char *psz_sout = config_GetPsz( p_this, "sout" );
  83
  84             p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
  85
  86             if( p_input && (!psz_sout || !*psz_sout) )
  87             {
  88                 vlc_object_detach( p_vout );
  89                 vlc_object_attach( p_vout, p_input );
  90             }
  91             else
  92             {
  93                 vlc_object_detach( p_vout );
  94                 vlc_object_release( p_vout );
  95                 vout_Destroy( p_vout );
  96             }
  97             if( psz_sout ) free( psz_sout );
  98             if( p_input ) vlc_object_release( p_input );
  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_input;
 116
 117             p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 118             if( p_input )
 119             {
 120                 p_vout = vlc_object_find( p_input, VLC_OBJECT_VOUT,
 121                                           FIND_CHILD );
 122                 vlc_object_release( p_input );
 123             }
 124         }
 125     }
 126
 127     /* If we now have a video output, check it has the right properties */
 128     if( p_vout )
 129     {
 130         char *psz_filter_chain;
 131
 132         /* We don't directly check for the "filter" variable for obvious
 133          * performance reasons. */
 134         if( p_vout->b_filter_change )
 135         {
 136             psz_filter_chain = config_GetPsz( p_this, "filter" );
 137
 138             if( psz_filter_chain && !*psz_filter_chain )
 139             {
 140                 free( psz_filter_chain );
 141                 psz_filter_chain = NULL;
 142             }
 143             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 144             {
 145                 free( p_vout->psz_filter_chain );
 146                 p_vout->psz_filter_chain = NULL;
 147             }
 148
 149             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 150                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 151                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 152             {
 153                 p_vout->b_filter_change = VLC_FALSE;
 154             }
 155
 156             if( psz_filter_chain ) free( psz_filter_chain );
 157         }
 158
 159         if( ( p_vout->render.i_width != i_width ) ||
 160             ( p_vout->render.i_height != i_height ) ||
 161             ( p_vout->render.i_chroma != i_chroma ) ||
 162             ( p_vout->render.i_aspect != i_aspect
 163                     && !p_vout->b_override_aspect ) ||
 164             p_vout->b_filter_change )
 165         {
 166             /* We are not interested in this format, close this vout */
 167             vlc_object_detach( p_vout );
 168             vlc_object_release( p_vout );
 169             vout_Destroy( p_vout );
 170             p_vout = NULL;
 171         }
 172         else
 173         {
 174             /* This video output is cool! Hijack it. */
 175             vlc_object_detach( p_vout );
 176             vlc_object_attach( p_vout, p_this );
 177             vlc_object_release( p_vout );
 178         }
 179     }
 180
 181     if( !p_vout )
 182     {
 183         msg_Dbg( p_this, "no usable vout present, spawning one" );
 184
 185         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 186     }
 187
 188     return p_vout;
 189 }
 190
 191 /*****************************************************************************
 192  * vout_Create: creates a new video output thread
 193  *****************************************************************************
 194  * This function creates a new video output thread, and returns a pointer
 195  * to its description. On error, it returns NULL.
 196  *****************************************************************************/
 197 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 198                                unsigned int i_width, unsigned int i_height,
 199                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 200 {
 201     vout_thread_t  * p_vout;                            /* thread descriptor */
 202     input_thread_t * p_input_thread;
 203     int              i_index;                               /* loop variable */
 204     char           * psz_plugin;
 205     vlc_value_t      val, text;
 206
 207     /* Allocate descriptor */
 208     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 209     if( p_vout == NULL )
 210     {
 211         msg_Err( p_parent, "out of memory" );
 212         return NULL;
 213     }
 214
 215     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 216     val.b_bool = VLC_TRUE;
 217     var_Set( p_vout, "intf-change", val );
 218
 219     p_vout->b_override_aspect = VLC_FALSE;
 220
 221     /* If the parent is not a VOUT object, that means we are at the start of
 222      * the video output pipe */
 223     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 224     {
 225         char *psz_aspect = config_GetPsz( p_parent, "aspect-ratio" );
 226
 227         /* Check whether the user tried to override aspect ratio */
 228         if( psz_aspect )
 229         {
 230             unsigned int i_new_aspect = i_aspect;
 231             char *psz_parser = strchr( psz_aspect, ':' );
 232
 233             if( psz_parser )
 234             {
 235                 *psz_parser++ = '\0';
 236                 i_new_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR
 237                                                   / atoi( psz_parser );
 238             }
 239             else
 240             {
 241                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 242                                        * atof( psz_aspect )
 243                                        / i_height;
 244             }
 245
 246             free( psz_aspect );
 247
 248             if( i_new_aspect && i_new_aspect != i_aspect )
 249             {
 250                 int i_pgcd = ReduceHeight( i_new_aspect );
 251
 252                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 253                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 254
 255                 i_aspect = i_new_aspect;
 256
 257                 p_vout->b_override_aspect = VLC_TRUE;
 258             }
 259         }
 260
 261         /* Look for the default filter configuration */
 262         p_vout->psz_filter_chain = config_GetPsz( p_parent, "filter" );
 263     }
 264     else
 265     {
 266         /* continue the parent's filter chain */
 267         char *psz_end;
 268
 269         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 270         if( psz_end && *(psz_end+1) )
 271             p_vout->psz_filter_chain = strdup( psz_end+1 );
 272         else p_vout->psz_filter_chain = NULL;
 273     }
 274
 275     /* Choose the video output module */
 276     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 277     {
 278         psz_plugin = config_GetPsz( p_parent, "vout" );
 279     }
 280     else
 281     {
 282         /* the filter chain is a string list of filters separated by double
 283          * colons */
 284         char *psz_end;
 285
 286         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 287         if( psz_end )
 288             psz_plugin = strndup( p_vout->psz_filter_chain,
 289                                   psz_end - p_vout->psz_filter_chain );
 290         else psz_plugin = strdup( p_vout->psz_filter_chain );
 291     }
 292
 293     /* Initialize pictures and subpictures - translation tables and functions
 294      * will be initialized later in InitThread */
 295     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
 296     {
 297         p_vout->p_picture[i_index].pf_lock = NULL;
 298         p_vout->p_picture[i_index].pf_unlock = NULL;
 299         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 300         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 301     }
 302
 303     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 304     {
 305         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 306         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 307     }
 308
 309     /* No images in the heap */
 310     p_vout->i_heap_size = 0;
 311
 312     /* Initialize the rendering heap */
 313     I_RENDERPICTURES = 0;
 314     p_vout->render.i_width    = i_width;
 315     p_vout->render.i_height   = i_height;
 316     p_vout->render.i_chroma   = i_chroma;
 317     p_vout->render.i_aspect   = i_aspect;
 318
 319     p_vout->render.i_rmask    = 0;
 320     p_vout->render.i_gmask    = 0;
 321     p_vout->render.i_bmask    = 0;
 322
 323     p_vout->render.i_last_used_pic = -1;
 324     p_vout->render.b_allow_modify_pics = 1;
 325
 326     /* Zero the output heap */
 327     I_OUTPUTPICTURES = 0;
 328     p_vout->output.i_width    = 0;
 329     p_vout->output.i_height   = 0;
 330     p_vout->output.i_chroma   = 0;
 331     p_vout->output.i_aspect   = 0;
 332
 333     p_vout->output.i_rmask    = 0;
 334     p_vout->output.i_gmask    = 0;
 335     p_vout->output.i_bmask    = 0;
 336
 337     /* Initialize misc stuff */
 338     p_vout->i_changes    = 0;
 339     p_vout->f_gamma      = 0;
 340     p_vout->b_grayscale  = 0;
 341     p_vout->b_info       = 0;
 342     p_vout->b_interface  = 0;
 343     p_vout->b_scale      = 1;
 344     p_vout->b_fullscreen = 0;
 345     p_vout->render_time  = 10;
 346     p_vout->c_fps_samples = 0;
 347     p_vout->b_filter_change = 0;
 348
 349     /* Mouse coordinates */
 350     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 351     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 352     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 353     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 354     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 355     var_Create( p_vout, "key-pressed", VLC_VAR_STRING );
 356
 357     /* Initialize the dimensions of the video window */
 358     InitWindowSize( p_vout, &p_vout->i_window_width,
 359                     &p_vout->i_window_height );
 360
 361     /* Create thread and set locks */
 362     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 363     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 364     vlc_mutex_init( p_vout, &p_vout->change_lock );
 365
 366     vlc_object_attach( p_vout, p_parent );
 367
 368     p_vout->p_module = module_Need( p_vout,
 369                            ( p_vout->psz_filter_chain &&
 370                                *p_vout->psz_filter_chain ) ?
 371                            "video filter" : "video output",
 372                            psz_plugin );
 373
 374     if( psz_plugin ) free( psz_plugin );
 375     if( p_vout->p_module == NULL )
 376     {
 377         msg_Err( p_vout, "no suitable vout module" );
 378         vlc_object_destroy( p_vout );
 379         return NULL;
 380     }
 381
 382     /* Create a few object variables for interface interaction */
 383     var_Create( p_vout, "fullscreen", VLC_VAR_BOOL );
 384     text.psz_string = _("Fullscreen");
 385     var_Change( p_vout, "fullscreen", VLC_VAR_SETTEXT, &text, NULL );
 386     var_Change( p_vout, "fullscreen", VLC_VAR_INHERITVALUE, &val, NULL );
 387     if( val.b_bool )
 388     {
 389         /* user requested fullscreen */
 390         p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
 391     }
 392     var_AddCallback( p_vout, "fullscreen", FullscreenCallback, NULL );
 393
 394     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 395     text.psz_string = _("Deinterlace");
 396     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 397     val.psz_string = ""; text.psz_string = _("Disable");
 398     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 399     val.psz_string = "discard"; text.psz_string = _("Discard");
 400     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 401     val.psz_string = "blend"; text.psz_string = _("Blend");
 402     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 403     val.psz_string = "mean"; text.psz_string = _("Mean");
 404     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 405     val.psz_string = "bob"; text.psz_string = _("Bob");
 406     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 407     val.psz_string = "linear"; text.psz_string = _("Linear");
 408     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 409     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 410     {
 411         var_Set( p_vout, "deinterlace", val );
 412     }
 413     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 414
 415     /* Calculate delay created by internal caching */
 416     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 417                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 418     if( p_input_thread )
 419     {
 420         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 421         vlc_object_release( p_input_thread );
 422     }
 423     else
 424     {
 425         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 426     }
 427
 428     if( vlc_thread_create( p_vout, "video output", RunThread,
 429                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 430     {
 431         msg_Err( p_vout, "out of memory" );
 432         module_Unneed( p_vout, p_vout->p_module );
 433         vlc_object_destroy( p_vout );
 434         return NULL;
 435     }
 436
 437     return p_vout;
 438 }
 439
 440 /*****************************************************************************
 441  * vout_Destroy: destroys a previously created video output
 442  *****************************************************************************
 443  * Destroy a terminated thread.
 444  * The function will request a destruction of the specified thread. If pi_error
 445  * is NULL, it will return once the thread is destroyed. Else, it will be
 446  * update using one of the THREAD_* constants.
 447  *****************************************************************************/
 448 void vout_Destroy( vout_thread_t *p_vout )
 449 {
 450     /* Request thread destruction */
 451     p_vout->b_die = VLC_TRUE;
 452     vlc_thread_join( p_vout );
 453
 454     var_Destroy( p_vout, "intf-change" );
 455
 456     /* Free structure */
 457     vlc_object_destroy( p_vout );
 458 }
 459
 460 /*****************************************************************************
 461  * InitThread: initialize video output thread
 462  *****************************************************************************
 463  * This function is called from RunThread and performs the second step of the
 464  * initialization. It returns 0 on success. Note that the thread's flag are not
 465  * modified inside this function.
 466  *****************************************************************************/
 467 static int InitThread( vout_thread_t *p_vout )
 468 {
 469     int i, i_pgcd;
 470
 471     vlc_mutex_lock( &p_vout->change_lock );
 472
 473 #ifdef STATS
 474     p_vout->c_loops = 0;
 475 #endif
 476
 477     /* Initialize output method, it allocates direct buffers for us */
 478     if( p_vout->pf_init( p_vout ) )
 479     {
 480         vlc_mutex_unlock( &p_vout->change_lock );
 481         return VLC_EGENERIC;
 482     }
 483
 484     if( !I_OUTPUTPICTURES )
 485     {
 486         msg_Err( p_vout, "plugin was unable to allocate at least "
 487                          "one direct buffer" );
 488         p_vout->pf_end( p_vout );
 489         vlc_mutex_unlock( &p_vout->change_lock );
 490         return VLC_EGENERIC;
 491     }
 492
 493     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 494     {
 495         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 496                          "our internal buffers must have overflown." );
 497         p_vout->pf_end( p_vout );
 498         vlc_mutex_unlock( &p_vout->change_lock );
 499         return VLC_EGENERIC;
 500     }
 501
 502     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 503
 504 #if 0
 505     if( !p_vout->psz_filter_chain )
 506     {
 507         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 508
 509         if( psz_aspect )
 510         {
 511             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 512                                                       * atof( psz_aspect )
 513                                                       / p_vout->output.i_height;
 514             free( psz_aspect );
 515
 516             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 517             {
 518                 int i_pgcd = ReduceHeight( i_new_aspect );
 519                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 520                          i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 521                 p_vout->output.i_aspect = i_new_aspect;
 522             }
 523         }
 524     }
 525 #endif
 526
 527     i_pgcd = ReduceHeight( p_vout->render.i_aspect );
 528     msg_Dbg( p_vout,
 529              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 530              p_vout->render.i_width, p_vout->render.i_height,
 531              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 532              p_vout->render.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 533
 534     i_pgcd = ReduceHeight( p_vout->output.i_aspect );
 535     msg_Dbg( p_vout,
 536              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 537              p_vout->output.i_width, p_vout->output.i_height,
 538              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 539              p_vout->output.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
 540
 541     /* Calculate shifts from system-updated masks */
 542     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 543                  p_vout->output.i_rmask );
 544     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 545                  p_vout->output.i_gmask );
 546     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 547                  p_vout->output.i_bmask );
 548
 549     /* Check whether we managed to create direct buffers similar to
 550      * the render buffers, ie same size and chroma */
 551     if( ( p_vout->output.i_width == p_vout->render.i_width )
 552      && ( p_vout->output.i_height == p_vout->render.i_height )
 553      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 554     {
 555         /* Cool ! We have direct buffers, we can ask the decoder to
 556          * directly decode into them ! Map the first render buffers to
 557          * the first direct buffers, but keep the first direct buffer
 558          * for memcpy operations */
 559         p_vout->b_direct = 1;
 560
 561         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 562         {
 563             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 564                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 565                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 566             {
 567                 /* We have enough direct buffers so there's no need to
 568                  * try to use system memory buffers. */
 569                 break;
 570             }
 571             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 572             I_RENDERPICTURES++;
 573         }
 574
 575         msg_Dbg( p_vout, "direct render, mapping "
 576                  "render pictures 0-%i to system pictures 1-%i",
 577                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 578     }
 579     else
 580     {
 581         /* Rats... Something is wrong here, we could not find an output
 582          * plugin able to directly render what we decode. See if we can
 583          * find a chroma plugin to do the conversion */
 584         p_vout->b_direct = 0;
 585
 586         /* Choose the best module */
 587         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
 588
 589         if( p_vout->chroma.p_module == NULL )
 590         {
 591             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 592                      (char*)&p_vout->render.i_chroma,
 593                      (char*)&p_vout->output.i_chroma );
 594             p_vout->pf_end( p_vout );
 595             vlc_mutex_unlock( &p_vout->change_lock );
 596             return VLC_EGENERIC;
 597         }
 598
 599         msg_Dbg( p_vout, "indirect render, mapping "
 600                  "render pictures 0-%i to system pictures %i-%i",
 601                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 602                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 603
 604         /* Append render buffers after the direct buffers */
 605         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 606         {
 607             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 608             I_RENDERPICTURES++;
 609
 610             /* Check if we have enough render pictures */
 611             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 612                 break;
 613         }
 614     }
 615
 616     /* Link pictures back to their heap */
 617     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 618     {
 619         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 620     }
 621
 622     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 623     {
 624         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 625     }
 626
 627 /* XXX XXX mark thread ready */
 628     return VLC_SUCCESS;
 629 }
 630
 631 /*****************************************************************************
 632  * RunThread: video output thread
 633  *****************************************************************************
 634  * Video output thread. This function does only returns when the thread is
 635  * terminated. It handles the pictures arriving in the video heap and the
 636  * display device events.
 637  *****************************************************************************/
 638 static void RunThread( vout_thread_t *p_vout)
 639 {
 640     int             i_index;                                /* index in heap */
 641     int             i_idle_loops = 0;  /* loops without displaying a picture */
 642     mtime_t         current_date;                            /* current date */
 643     mtime_t         display_date;                            /* display date */
 644
 645     picture_t *     p_picture;                            /* picture pointer */
 646     picture_t *     p_last_picture = NULL;                   /* last picture */
 647     picture_t *     p_directbuffer;              /* direct buffer to display */
 648
 649     subpicture_t *  p_subpic;                          /* subpicture pointer */
 650
 651     /*
 652      * Initialize thread
 653      */
 654     p_vout->b_error = InitThread( p_vout );
 655
 656     /* signal the creation of the vout */
 657     vlc_thread_ready( p_vout );
 658
 659     if( p_vout->b_error )
 660     {
 661         /* Destroy thread structures allocated by Create and InitThread */
 662         DestroyThread( p_vout );
 663         return;
 664     }
 665
 666     /*
 667      * Main loop - it is not executed if an error occured during
 668      * initialization
 669      */
 670     while( (!p_vout->b_die) && (!p_vout->b_error) )
 671     {
 672         /* Initialize loop variables */
 673         p_picture = NULL;
 674         display_date = 0;
 675         current_date = mdate();
 676
 677 #if 0
 678         p_vout->c_loops++;
 679         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 680         {
 681             msg_Dbg( p_vout, "picture heap: %d/%d",
 682                      I_RENDERPICTURES, p_vout->i_heap_size );
 683         }
 684 #endif
 685
 686         /*
 687          * Find the picture to display (the one with the earliest date).
 688          * This operation does not need lock, since only READY_PICTUREs
 689          * are handled. */
 690         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 691         {
 692             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 693                 && ( (p_picture == NULL) ||
 694                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 695             {
 696                 p_picture = PP_RENDERPICTURE[i_index];
 697                 display_date = p_picture->date;
 698             }
 699         }
 700
 701         if( p_picture )
 702         {
 703             /* If we met the last picture, parse again to see whether there is
 704              * a more appropriate one. */
 705             if( p_picture == p_last_picture )
 706             {
 707                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 708                 {
 709                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 710                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 711                         && ((p_picture == p_last_picture) ||
 712                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 713                     {
 714                         p_picture = PP_RENDERPICTURE[i_index];
 715                         display_date = p_picture->date;
 716                     }
 717                 }
 718             }
 719
 720             /* If we found better than the last picture, destroy it */
 721             if( p_last_picture && p_picture != p_last_picture )
 722             {
 723                 vlc_mutex_lock( &p_vout->picture_lock );
 724                 if( p_last_picture->i_refcount )
 725                 {
 726                     p_last_picture->i_status = DISPLAYED_PICTURE;
 727                 }
 728                 else
 729                 {
 730                     p_last_picture->i_status = DESTROYED_PICTURE;
 731                     p_vout->i_heap_size--;
 732                 }
 733                 vlc_mutex_unlock( &p_vout->picture_lock );
 734                 p_last_picture = NULL;
 735             }
 736
 737             /* Compute FPS rate */
 738             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 739                 = display_date;
 740
 741             if( !p_picture->b_force &&
 742                 p_picture != p_last_picture &&
 743                 display_date < current_date + p_vout->render_time )
 744             {
 745                 /* Picture is late: it will be destroyed and the thread
 746                  * will directly choose the next picture */
 747                 vlc_mutex_lock( &p_vout->picture_lock );
 748                 if( p_picture->i_refcount )
 749                 {
 750                     /* Pretend we displayed the picture, but don't destroy
 751                      * it since the decoder might still need it. */
 752                     p_picture->i_status = DISPLAYED_PICTURE;
 753                 }
 754                 else
 755                 {
 756                     /* Destroy the picture without displaying it */
 757                     p_picture->i_status = DESTROYED_PICTURE;
 758                     p_vout->i_heap_size--;
 759                 }
 760                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 761                                   current_date - display_date );
 762                 vlc_mutex_unlock( &p_vout->picture_lock );
 763
 764                 continue;
 765             }
 766
 767             if( display_date >
 768                 current_date + p_vout->i_pts_delay +  VOUT_BOGUS_DELAY )
 769             {
 770                 /* Picture is waaay too early: it will be destroyed */
 771                 vlc_mutex_lock( &p_vout->picture_lock );
 772                 if( p_picture->i_refcount )
 773                 {
 774                     /* Pretend we displayed the picture, but don't destroy
 775                      * it since the decoder might still need it. */
 776                     p_picture->i_status = DISPLAYED_PICTURE;
 777                 }
 778                 else
 779                 {
 780                     /* Destroy the picture without displaying it */
 781                     p_picture->i_status = DESTROYED_PICTURE;
 782                     p_vout->i_heap_size--;
 783                 }
 784                 msg_Warn( p_vout, "vout warning: early picture skipped "
 785                           "("I64Fd")", display_date - current_date
 786                           - p_vout->i_pts_delay );
 787                 vlc_mutex_unlock( &p_vout->picture_lock );
 788
 789                 continue;
 790             }
 791
 792             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 793             {
 794                 /* A picture is ready to be rendered, but its rendering date
 795                  * is far from the current one so the thread will perform an
 796                  * empty loop as if no picture were found. The picture state
 797                  * is unchanged */
 798                 p_picture    = NULL;
 799                 display_date = 0;
 800             }
 801             else if( p_picture == p_last_picture )
 802             {
 803                 /* We are asked to repeat the previous picture, but we first
 804                  * wait for a couple of idle loops */
 805                 if( i_idle_loops < 4 )
 806                 {
 807                     p_picture    = NULL;
 808                     display_date = 0;
 809                 }
 810                 else
 811                 {
 812                     /* We set the display date to something high, otherwise
 813                      * we'll have lots of problems with late pictures */
 814                     display_date = current_date + p_vout->render_time;
 815                 }
 816             }
 817         }
 818
 819         if( p_picture == NULL )
 820         {
 821             i_idle_loops++;
 822         }
 823
 824         /*
 825          * Check for subpictures to display
 826          */
 827         p_subpic = vout_SortSubPictures( p_vout, display_date );
 828
 829         /*
 830          * Perform rendering
 831          */
 832         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 833
 834         /*
 835          * Call the plugin-specific rendering method if there is one
 836          */
 837         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 838         {
 839             /* Render the direct buffer returned by vout_RenderPicture */
 840             p_vout->pf_render( p_vout, p_directbuffer );
 841         }
 842
 843         /*
 844          * Sleep, wake up
 845          */
 846         if( display_date != 0 && p_directbuffer != NULL )
 847         {
 848             /* Store render time using a sliding mean */
 849             p_vout->render_time += mdate() - current_date;
 850             p_vout->render_time >>= 1;
 851         }
 852
 853         /* Give back change lock */
 854         vlc_mutex_unlock( &p_vout->change_lock );
 855
 856         /* Sleep a while or until a given date */
 857         if( display_date != 0 )
 858         {
 859             mwait( display_date - VOUT_MWAIT_TOLERANCE );
 860         }
 861         else
 862         {
 863             msleep( VOUT_IDLE_SLEEP );
 864         }
 865
 866         /* On awakening, take back lock and send immediately picture
 867          * to display. */
 868         vlc_mutex_lock( &p_vout->change_lock );
 869
 870         /*
 871          * Display the previously rendered picture
 872          */
 873         if( p_picture != NULL && p_directbuffer != NULL )
 874         {
 875             /* Display the direct buffer returned by vout_RenderPicture */
 876             if( p_vout->pf_display )
 877             {
 878                 p_vout->pf_display( p_vout, p_directbuffer );
 879             }
 880
 881             /* Reinitialize idle loop count */
 882             i_idle_loops = 0;
 883
 884             /* Tell the vout this was the last picture and that it does not
 885              * need to be forced anymore. */
 886             p_last_picture = p_picture;
 887             p_last_picture->b_force = 0;
 888         }
 889
 890         /*
 891          * Check events and manage thread
 892          */
 893         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 894         {
 895             /* A fatal error occured, and the thread must terminate
 896              * immediately, without displaying anything - setting b_error to 1
 897              * causes the immediate end of the main while() loop. */
 898             p_vout->b_error = 1;
 899         }
 900
 901         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 902         {
 903             /* this must only happen when the vout plugin is incapable of
 904              * rescaling the picture itself. In this case we need to destroy
 905              * the current picture buffers and recreate new ones with the right
 906              * dimensions */
 907             int i;
 908
 909             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 910
 911             p_vout->pf_end( p_vout );
 912             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 913                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 914
 915             I_OUTPUTPICTURES = 0;
 916             if( p_vout->pf_init( p_vout ) )
 917             {
 918                 msg_Err( p_vout, "cannot resize display" );
 919                 /* FIXME: pf_end will be called again in EndThread() */
 920                 p_vout->b_error = 1;
 921             }
 922
 923             /* Need to reinitialise the chroma plugin */
 924             if( p_vout->chroma.p_module->pf_deactivate )
 925                 p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
 926             p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
 927         }
 928     }
 929
 930     /*
 931      * Error loop - wait until the thread destruction is requested
 932      */
 933     if( p_vout->b_error )
 934     {
 935         ErrorThread( p_vout );
 936     }
 937
 938     /* End of thread */
 939     EndThread( p_vout );
 940
 941     /* Destroy thread structures allocated by CreateThread */
 942     DestroyThread( p_vout );
 943 }
 944
 945 /*****************************************************************************
 946  * ErrorThread: RunThread() error loop
 947  *****************************************************************************
 948  * This function is called when an error occured during thread main's loop. The
 949  * thread can still receive feed, but must be ready to terminate as soon as
 950  * possible.
 951  *****************************************************************************/
 952 static void ErrorThread( vout_thread_t *p_vout )
 953 {
 954     /* Wait until a `die' order */
 955     while( !p_vout->b_die )
 956     {
 957         /* Sleep a while */
 958         msleep( VOUT_IDLE_SLEEP );
 959     }
 960 }
 961
 962 /*****************************************************************************
 963  * EndThread: thread destruction
 964  *****************************************************************************
 965  * This function is called when the thread ends after a sucessful
 966  * initialization. It frees all ressources allocated by InitThread.
 967  *****************************************************************************/
 968 static void EndThread( vout_thread_t *p_vout )
 969 {
 970     int     i_index;                                        /* index in heap */
 971
 972 #ifdef STATS
 973     {
 974         struct tms cpu_usage;
 975         times( &cpu_usage );
 976
 977         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
 978                  cpu_usage.tms_utime, cpu_usage.tms_stime );
 979     }
 980 #endif
 981
 982     if( !p_vout->b_direct )
 983     {
 984         module_Unneed( p_vout, p_vout->chroma.p_module );
 985     }
 986
 987     /* Destroy all remaining pictures */
 988     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
 989     {
 990         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
 991         {
 992             free( p_vout->p_picture[i_index].p_data_orig );
 993         }
 994     }
 995
 996     /* Destroy all remaining subpictures */
 997     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
 998     {
 999         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1000         {
1001             vout_DestroySubPicture( p_vout,
1002                                     &p_vout->p_subpicture[i_index] );
1003         }
1004     }
1005
1006     /* Destroy translation tables */
1007     p_vout->pf_end( p_vout );
1008
1009     /* Release the change lock */
1010     vlc_mutex_unlock( &p_vout->change_lock );
1011 }
1012
1013 /*****************************************************************************
1014  * DestroyThread: thread destruction
1015  *****************************************************************************
1016  * This function is called when the thread ends. It frees all ressources
1017  * allocated by CreateThread. Status is available at this stage.
1018  *****************************************************************************/
1019 static void DestroyThread( vout_thread_t *p_vout )
1020 {
1021     /* Destroy the locks */
1022     vlc_mutex_destroy( &p_vout->picture_lock );
1023     vlc_mutex_destroy( &p_vout->subpicture_lock );
1024     vlc_mutex_destroy( &p_vout->change_lock );
1025
1026     /* Release the module */
1027     module_Unneed( p_vout, p_vout->p_module );
1028 }
1029
1030 /* following functions are local */
1031
1032 static int ReduceHeight( int i_ratio )
1033 {
1034     int i_dummy = VOUT_ASPECT_FACTOR;
1035     int i_pgcd  = 1;
1036
1037     if( !i_ratio )
1038     {
1039         return i_pgcd;
1040     }
1041
1042     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1043     while( !(i_ratio & 1) && !(i_dummy & 1) )
1044     {
1045         i_ratio >>= 1;
1046         i_dummy >>= 1;
1047         i_pgcd  <<= 1;
1048     }
1049
1050     while( !(i_ratio % 3) && !(i_dummy % 3) )
1051     {
1052         i_ratio /= 3;
1053         i_dummy /= 3;
1054         i_pgcd  *= 3;
1055     }
1056
1057     while( !(i_ratio % 5) && !(i_dummy % 5) )
1058     {
1059         i_ratio /= 5;
1060         i_dummy /= 5;
1061         i_pgcd  *= 5;
1062     }
1063
1064     return i_pgcd;
1065 }
1066
1067 /*****************************************************************************
1068  * BinaryLog: computes the base 2 log of a binary value
1069  *****************************************************************************
1070  * This functions is used by MaskToShift, to get a bit index from a binary
1071  * value.
1072  *****************************************************************************/
1073 static int BinaryLog( uint32_t i )
1074 {
1075     int i_log = 0;
1076
1077     if( i == 0 ) return -31337;
1078
1079     if( i & 0xffff0000 ) i_log += 16;
1080     if( i & 0xff00ff00 ) i_log += 8;
1081     if( i & 0xf0f0f0f0 ) i_log += 4;
1082     if( i & 0xcccccccc ) i_log += 2;
1083     if( i & 0xaaaaaaaa ) i_log += 1;
1084
1085     return i_log;
1086 }
1087
1088 /*****************************************************************************
1089  * MaskToShift: transform a color mask into right and left shifts
1090  *****************************************************************************
1091  * This function is used for obtaining color shifts from masks.
1092  *****************************************************************************/
1093 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1094 {
1095     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1096
1097     if( !i_mask )
1098     {
1099         *pi_left = *pi_right = 0;
1100         return;
1101     }
1102
1103     /* Get bits */
1104     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1105     i_high = i_mask + i_low;                       /* higher bit of the mask */
1106
1107     /* Transform bits into an index */
1108     i_low =  BinaryLog (i_low);
1109     i_high = BinaryLog (i_high);
1110
1111     /* Update pointers and return */
1112     *pi_left =   i_low;
1113     *pi_right = (8 - i_high + i_low);
1114 }
1115
1116 /*****************************************************************************
1117  * InitWindowSize: find the initial dimensions the video window should have.
1118  *****************************************************************************
1119  * This function will check the "width", "height" and "zoom" config options and
1120  * will calculate the size that the video window should have.
1121  *****************************************************************************/
1122 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1123                             int *pi_height )
1124 {
1125     int i_width, i_height;
1126     uint64_t ll_zoom;
1127
1128 #define FP_FACTOR 1000                             /* our fixed point factor */
1129
1130     i_width = config_GetInt( p_vout, "width" );
1131     i_height = config_GetInt( p_vout, "height" );
1132     ll_zoom = (uint64_t)( FP_FACTOR * config_GetFloat( p_vout, "zoom" ) );
1133
1134     if( i_width > 0 && i_height > 0)
1135     {
1136         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1137         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1138         return;
1139     }
1140     else if( i_width > 0 )
1141     {
1142         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1143         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1144                             p_vout->render.i_aspect / FP_FACTOR );
1145         return;
1146     }
1147     else if( i_height > 0 )
1148     {
1149         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1150         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1151                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1152         return;
1153     }
1154
1155     if( p_vout->render.i_height * p_vout->render.i_aspect
1156         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1157     {
1158         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1159           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1160         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1161     }
1162     else
1163     {
1164         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1165         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1166           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1167     }
1168
1169 #undef FP_FACTOR
1170 }
1171
1172 /*****************************************************************************
1173  * vout_VarCallback: generic callback for intf variables
1174  *****************************************************************************/
1175 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1176                       vlc_value_t old_value, vlc_value_t new_value,
1177                       void * unused )
1178 {
1179     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1180     vlc_value_t val;
1181     val.b_bool = VLC_TRUE;
1182     var_Set( p_vout, "intf-change", val );
1183     return VLC_SUCCESS;
1184 }
1185
1186 /*****************************************************************************
1187  * object variables callbacks: a bunch of object variables are used by the
1188  * interfaces to interact with the vout.
1189  *****************************************************************************/
1190 static int FullscreenCallback( vlc_object_t *p_this, char const *psz_cmd,
1191                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1192 {
1193     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1194     input_thread_t *p_input;
1195     vlc_value_t val;
1196
1197     p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
1198
1199     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1200                                                  FIND_PARENT );
1201     if( p_input )
1202     {
1203         /* Modify input as well because the vout might have to be restarted */
1204         var_Create( p_input, "fullscreen", VLC_VAR_BOOL );
1205         var_Set( p_input, "fullscreen", newval );
1206
1207         vlc_object_release( p_input );
1208     }
1209
1210     val.b_bool = VLC_TRUE;
1211     var_Set( p_vout, "intf-change", val );
1212     return VLC_SUCCESS;
1213 }
1214
1215 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1216                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1217 {
1218     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1219     input_thread_t *p_input;
1220     vlc_value_t val;
1221
1222     char *psz_mode = newval.psz_string;
1223     char *psz_filter;
1224     unsigned int  i;
1225
1226     psz_filter = config_GetPsz( p_vout, "filter" );
1227
1228     if( !psz_mode || !*psz_mode )
1229     {
1230         config_PutPsz( p_vout, "filter", "" );
1231     }
1232     else
1233     {
1234         if( !psz_filter || !*psz_filter )
1235         {
1236             config_PutPsz( p_vout, "filter", "deinterlace" );
1237         }
1238         else
1239         {
1240             if( strstr( psz_filter, "deinterlace" ) == NULL )
1241             {
1242                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1243                 strcat( psz_filter, ",deinterlace" );
1244             }
1245             config_PutPsz( p_vout, "filter", psz_filter );
1246         }
1247     }
1248
1249     if( psz_filter ) free( psz_filter );
1250
1251
1252     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1253                                                  FIND_PARENT );
1254     if( !p_input ) return VLC_EGENERIC;
1255
1256     if( psz_mode && *psz_mode )
1257     {
1258         val.psz_string = psz_mode;
1259         var_Set( p_vout, "deinterlace-mode", val );
1260         /* Modify input as well because the vout might have to be restarted */
1261         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1262         var_Set( p_input, "deinterlace-mode", val );
1263     }
1264
1265     /* now restart all video streams */
1266     vlc_mutex_lock( &p_input->stream.stream_lock );
1267
1268     p_vout->b_filter_change = VLC_TRUE;
1269
1270 #define ES p_input->stream.pp_es[i]
1271
1272     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1273     {
1274         if( ( ES->i_cat == VIDEO_ES ) && ES->p_decoder_fifo != NULL )
1275         {
1276             input_UnselectES( p_input, ES );
1277             input_SelectES( p_input, ES );
1278         }
1279 #undef ES
1280     }
1281     vlc_mutex_unlock( &p_input->stream.stream_lock );
1282
1283     vlc_object_release( p_input );
1284
1285     val.b_bool = VLC_TRUE;
1286     var_Set( p_vout, "intf-change", val );
1287     return VLC_SUCCESS;
1288 }