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

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  *
   4  * This module describes the programming interface for video output threads.
   5  * It includes functions allowing to open a new thread, send pictures to a
   6  * thread, and destroy a previously oppened video output thread.
   7  *****************************************************************************
   8  * Copyright (C) 2000-2004 the VideoLAN team
   9  * $Id$
  10  *
  11  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  12  *          Gildas Bazin <gbazin@videolan.org>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  27  *****************************************************************************/
  28
  29 /*****************************************************************************
  30  * Preamble
  31  *****************************************************************************/
  32 #include <stdlib.h>                                                /* free() */
  33
  34 #include <vlc/vlc.h>
  35
  36 #ifdef HAVE_SYS_TIMES_H
  37 #   include <sys/times.h>
  38 #endif
  39
  40 #include "vlc_video.h"
  41 #include "video_output.h"
  42 #include "vlc_spu.h"
  43 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  44 #include "vlc_playlist.h"
  45
  46 #if defined( SYS_DARWIN )
  47 #include "darwin_specific.h"
  48 #endif
  49
  50 /*****************************************************************************
  51  * Local prototypes
  52  *****************************************************************************/
  53 static int      InitThread        ( vout_thread_t * );
  54 static void     RunThread         ( vout_thread_t * );
  55 static void     ErrorThread       ( vout_thread_t * );
  56 static void     EndThread         ( vout_thread_t * );
  57 static void     DestroyThread     ( vout_thread_t * );
  58
  59 static void     AspectRatio       ( int, int *, int * );
  60 static int      BinaryLog         ( uint32_t );
  61 static void     MaskToShift       ( int *, int *, uint32_t );
  62
  63 /* Object variables callbacks */
  64 static int DeinterlaceCallback( vlc_object_t *, char const *,
  65                                 vlc_value_t, vlc_value_t, void * );
  66 static int FilterCallback( vlc_object_t *, char const *,
  67                            vlc_value_t, vlc_value_t, void * );
  68
  69 /* From vout_intf.c */
  70 int vout_Snapshot( vout_thread_t *, picture_t * );
  71
  72 /*****************************************************************************
  73  * vout_Request: find a video output thread, create one, or destroy one.
  74  *****************************************************************************
  75  * This function looks for a video output thread matching the current
  76  * properties. If not found, it spawns a new one.
  77  *****************************************************************************/
  78 vout_thread_t *__vout_Request( vlc_object_t *p_this, vout_thread_t *p_vout,
  79                                video_format_t *p_fmt )
  80 {
  81     if( !p_fmt )
  82     {
  83         /* Reattach video output to input before bailing out */
  84         if( p_vout )
  85         {
  86             vlc_object_t *p_playlist;
  87
  88             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
  89                                           FIND_ANYWHERE );
  90
  91             if( p_playlist )
  92             {
  93                 spu_Attach( p_vout->p_spu, p_this, VLC_FALSE );
  94                 vlc_object_detach( p_vout );
  95                 vlc_object_attach( p_vout, p_playlist );
  96
  97                 vlc_object_release( p_playlist );
  98             }
  99             else
 100             {
 101                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 102                 vlc_object_detach( p_vout );
 103                 vout_Destroy( p_vout );
 104             }
 105         }
 106         return NULL;
 107     }
 108
 109     /* If a video output was provided, lock it, otherwise look for one. */
 110     if( p_vout )
 111     {
 112         vlc_object_yield( p_vout );
 113     }
 114     else
 115     {
 116         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 117
 118         if( !p_vout )
 119         {
 120             playlist_t *p_playlist;
 121
 122             p_playlist = vlc_object_find( p_this,
 123                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 124             if( p_playlist )
 125             {
 126                 vlc_mutex_lock( &p_playlist->gc_lock );
 127                 p_vout = vlc_object_find( p_playlist,
 128                                           VLC_OBJECT_VOUT, FIND_CHILD );
 129                 /* only first children of p_input for unused vout */
 130                 if( p_vout && p_vout->p_parent != (vlc_object_t *)p_playlist )
 131                 {
 132                     vlc_object_release( p_vout );
 133                     p_vout = NULL;
 134                 }
 135                 vlc_mutex_unlock( &p_playlist->gc_lock );
 136                 vlc_object_release( p_playlist );
 137             }
 138         }
 139     }
 140
 141     /* If we now have a video output, check it has the right properties */
 142     if( p_vout )
 143     {
 144         char *psz_filter_chain;
 145         vlc_value_t val;
 146
 147         /* We don't directly check for the "vout-filter" variable for obvious
 148          * performance reasons. */
 149         if( p_vout->b_filter_change )
 150         {
 151             var_Get( p_vout, "vout-filter", &val );
 152             psz_filter_chain = val.psz_string;
 153
 154             if( psz_filter_chain && !*psz_filter_chain )
 155             {
 156                 free( psz_filter_chain );
 157                 psz_filter_chain = NULL;
 158             }
 159             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 160             {
 161                 free( p_vout->psz_filter_chain );
 162                 p_vout->psz_filter_chain = NULL;
 163             }
 164
 165             if( !psz_filter_chain && !p_vout->psz_filter_chain )
 166             {
 167                 p_vout->b_filter_change = VLC_FALSE;
 168             }
 169
 170             if( psz_filter_chain ) free( psz_filter_chain );
 171         }
 172
 173         if( ( p_vout->fmt_render.i_width != p_fmt->i_width ) ||
 174             ( p_vout->fmt_render.i_height != p_fmt->i_height ) ||
 175             ( p_vout->fmt_render.i_chroma != p_fmt->i_chroma ) ||
 176             ( p_vout->fmt_render.i_aspect != p_fmt->i_aspect ) ||
 177             p_vout->b_filter_change )
 178         {
 179             /* We are not interested in this format, close this vout */
 180             vlc_object_detach( p_vout );
 181             vlc_object_release( p_vout );
 182             vout_Destroy( p_vout );
 183             p_vout = NULL;
 184         }
 185         else
 186         {
 187             /* This video output is cool! Hijack it. */
 188             vlc_object_detach( p_vout );
 189             spu_Attach( p_vout->p_spu, p_this, VLC_TRUE );
 190             vlc_object_attach( p_vout, p_this );
 191             vlc_object_release( p_vout );
 192         }
 193     }
 194
 195     if( !p_vout )
 196     {
 197         msg_Dbg( p_this, "no usable vout present, spawning one" );
 198
 199         p_vout = vout_Create( p_this, p_fmt );
 200     }
 201
 202     return p_vout;
 203 }
 204
 205 /*****************************************************************************
 206  * vout_Create: creates a new video output thread
 207  *****************************************************************************
 208  * This function creates a new video output thread, and returns a pointer
 209  * to its description. On error, it returns NULL.
 210  *****************************************************************************/
 211 vout_thread_t * __vout_Create( vlc_object_t *p_parent, video_format_t *p_fmt )
 212 {
 213     vout_thread_t  * p_vout;                            /* thread descriptor */
 214     input_thread_t * p_input_thread;
 215     int              i_index;                               /* loop variable */
 216     char           * psz_plugin;
 217     vlc_value_t      val, text;
 218
 219     unsigned int i_width = p_fmt->i_width;
 220     unsigned int i_height = p_fmt->i_height;
 221     vlc_fourcc_t i_chroma = p_fmt->i_chroma;
 222     unsigned int i_aspect = p_fmt->i_aspect;
 223
 224     /* Allocate descriptor */
 225     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 226     if( p_vout == NULL )
 227     {
 228         msg_Err( p_parent, "out of memory" );
 229         return NULL;
 230     }
 231
 232     stats_Create( p_vout, "displayed_pictures", VLC_VAR_INTEGER,
 233                                                  STATS_COUNTER );
 234     stats_Create( p_vout, "lost_pictures", VLC_VAR_INTEGER, STATS_COUNTER );
 235
 236     /* Initialize pictures - translation tables and functions
 237      * will be initialized later in InitThread */
 238     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 239     {
 240         p_vout->p_picture[i_index].pf_lock = NULL;
 241         p_vout->p_picture[i_index].pf_unlock = NULL;
 242         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 243         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 244         p_vout->p_picture[i_index].b_slow   = 0;
 245     }
 246
 247     /* No images in the heap */
 248     p_vout->i_heap_size = 0;
 249
 250     /* Initialize the rendering heap */
 251     I_RENDERPICTURES = 0;
 252
 253     vlc_ureduce( &p_fmt->i_sar_num, &p_fmt->i_sar_den,
 254                  p_fmt->i_sar_num, p_fmt->i_sar_den, 50000 );
 255     p_vout->fmt_render        = *p_fmt;   /* FIXME palette */
 256     p_vout->fmt_in            = *p_fmt;   /* FIXME palette */
 257
 258     p_vout->render.i_width    = i_width;
 259     p_vout->render.i_height   = i_height;
 260     p_vout->render.i_chroma   = i_chroma;
 261     p_vout->render.i_aspect   = i_aspect;
 262
 263     p_vout->render.i_rmask    = 0;
 264     p_vout->render.i_gmask    = 0;
 265     p_vout->render.i_bmask    = 0;
 266
 267     p_vout->render.i_last_used_pic = -1;
 268     p_vout->render.b_allow_modify_pics = 1;
 269
 270     /* Zero the output heap */
 271     I_OUTPUTPICTURES = 0;
 272     p_vout->output.i_width    = 0;
 273     p_vout->output.i_height   = 0;
 274     p_vout->output.i_chroma   = 0;
 275     p_vout->output.i_aspect   = 0;
 276
 277     p_vout->output.i_rmask    = 0;
 278     p_vout->output.i_gmask    = 0;
 279     p_vout->output.i_bmask    = 0;
 280
 281     /* Initialize misc stuff */
 282     p_vout->i_changes    = 0;
 283     p_vout->f_gamma      = 0;
 284     p_vout->b_grayscale  = 0;
 285     p_vout->b_info       = 0;
 286     p_vout->b_interface  = 0;
 287     p_vout->b_scale      = 1;
 288     p_vout->b_fullscreen = 0;
 289     p_vout->i_alignment  = 0;
 290     p_vout->render_time  = 10;
 291     p_vout->c_fps_samples = 0;
 292     p_vout->b_filter_change = 0;
 293     p_vout->pf_control = 0;
 294     p_vout->p_parent_intf = 0;
 295     p_vout->i_par_num = p_vout->i_par_den = 1;
 296
 297     /* Initialize locks */
 298     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 299     vlc_mutex_init( p_vout, &p_vout->change_lock );
 300
 301     /* Mouse coordinates */
 302     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 303     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 304     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 305     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 306     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 307
 308     /* Initialize subpicture unit */
 309     p_vout->p_spu = spu_Create( p_vout );
 310     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
 311
 312     /* Attach the new object now so we can use var inheritance below */
 313     vlc_object_attach( p_vout, p_parent );
 314
 315     spu_Init( p_vout->p_spu );
 316
 317     /* Take care of some "interface/control" related initialisations */
 318     vout_IntfInit( p_vout );
 319
 320     /* If the parent is not a VOUT object, that means we are at the start of
 321      * the video output pipe */
 322     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 323     {
 324         /* Look for the default filter configuration */
 325         var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 326         var_Get( p_vout, "vout-filter", &val );
 327         p_vout->psz_filter_chain = val.psz_string;
 328     }
 329     else
 330     {
 331         /* continue the parent's filter chain */
 332         char *psz_end;
 333
 334         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 335         if( psz_end && *(psz_end+1) )
 336             p_vout->psz_filter_chain = strdup( psz_end+1 );
 337         else p_vout->psz_filter_chain = NULL;
 338     }
 339
 340     /* Choose the video output module */
 341     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 342     {
 343         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 344         var_Get( p_vout, "vout", &val );
 345         psz_plugin = val.psz_string;
 346     }
 347     else
 348     {
 349         /* the filter chain is a string list of filters separated by double
 350          * colons */
 351         char *psz_end;
 352
 353         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 354         if( psz_end )
 355             psz_plugin = strndup( p_vout->psz_filter_chain,
 356                                   psz_end - p_vout->psz_filter_chain );
 357         else psz_plugin = strdup( p_vout->psz_filter_chain );
 358     }
 359
 360     /* Create the vout thread */
 361     p_vout->p_module = module_Need( p_vout,
 362         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 363         "video filter" : "video output", psz_plugin, 0 );
 364
 365     if( psz_plugin ) free( psz_plugin );
 366     if( p_vout->p_module == NULL )
 367     {
 368         msg_Err( p_vout, "no suitable vout module" );
 369         vlc_object_detach( p_vout );
 370         vlc_object_destroy( p_vout );
 371         return NULL;
 372     }
 373
 374     /* Create a few object variables for interface interaction */
 375     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 376     text.psz_string = _("Deinterlace");
 377     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 378     val.psz_string = ""; text.psz_string = _("Disable");
 379     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 380     val.psz_string = "discard"; text.psz_string = _("Discard");
 381     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 382     val.psz_string = "blend"; text.psz_string = _("Blend");
 383     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 384     val.psz_string = "mean"; text.psz_string = _("Mean");
 385     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 386     val.psz_string = "bob"; text.psz_string = _("Bob");
 387     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 388     val.psz_string = "linear"; text.psz_string = _("Linear");
 389     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 390     val.psz_string = "x"; text.psz_string = "X";
 391     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 392
 393     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 394     {
 395         var_Set( p_vout, "deinterlace", val );
 396         if( val.psz_string ) free( val.psz_string );
 397     }
 398     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 399
 400
 401     var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 402     text.psz_string = _("Filters");
 403     var_Change( p_vout, "vout-filter", VLC_VAR_SETTEXT, &text, NULL );
 404     var_AddCallback( p_vout, "vout-filter", FilterCallback, NULL );
 405
 406     /* Calculate delay created by internal caching */
 407     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 408                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 409     if( p_input_thread )
 410     {
 411         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 412         vlc_object_release( p_input_thread );
 413     }
 414     else
 415     {
 416         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 417     }
 418
 419     if( vlc_thread_create( p_vout, "video output", RunThread,
 420                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 421     {
 422         msg_Err( p_vout, "out of memory" );
 423         module_Unneed( p_vout, p_vout->p_module );
 424         vlc_object_detach( p_vout );
 425         vlc_object_destroy( p_vout );
 426         return NULL;
 427     }
 428
 429     if( p_vout->b_error )
 430     {
 431         msg_Err( p_vout, "video output creation failed" );
 432
 433         /* Make sure the thread is destroyed */
 434         p_vout->b_die = VLC_TRUE;
 435
 436         vlc_thread_join( p_vout );
 437
 438         vlc_object_detach( p_vout );
 439         vlc_object_destroy( p_vout );
 440         return NULL;
 441     }
 442
 443     return p_vout;
 444 }
 445
 446 /*****************************************************************************
 447  * vout_Destroy: destroys a previously created video output
 448  *****************************************************************************
 449  * Destroy a terminated thread.
 450  * The function will request a destruction of the specified thread. If pi_error
 451  * is NULL, it will return once the thread is destroyed. Else, it will be
 452  * update using one of the THREAD_* constants.
 453  *****************************************************************************/
 454 void vout_Destroy( vout_thread_t *p_vout )
 455 {
 456     vlc_object_t *p_playlist;
 457
 458     /* Request thread destruction */
 459     p_vout->b_die = VLC_TRUE;
 460     vlc_thread_join( p_vout );
 461
 462     var_Destroy( p_vout, "intf-change" );
 463
 464     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 465                                   FIND_ANYWHERE );
 466
 467     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 468
 469     /* Free structure */
 470     vlc_object_destroy( p_vout );
 471
 472     /* If it was the last vout, tell the interface to show up */
 473     if( p_playlist != NULL )
 474     {
 475         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 476                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 477         if( p_another_vout == NULL )
 478         {
 479             vlc_value_t val;
 480             val.b_bool = VLC_TRUE;
 481             var_Set( p_playlist, "intf-show", val );
 482         }
 483         else
 484         {
 485             vlc_object_release( p_another_vout );
 486         }
 487         vlc_object_release( p_playlist );
 488     }
 489 }
 490
 491 /*****************************************************************************
 492  * InitThread: initialize video output thread
 493  *****************************************************************************
 494  * This function is called from RunThread and performs the second step of the
 495  * initialization. It returns 0 on success. Note that the thread's flag are not
 496  * modified inside this function.
 497  *****************************************************************************/
 498 static int InitThread( vout_thread_t *p_vout )
 499 {
 500     int i, i_aspect_x, i_aspect_y;
 501
 502     vlc_mutex_lock( &p_vout->change_lock );
 503
 504 #ifdef STATS
 505     p_vout->c_loops = 0;
 506 #endif
 507
 508     /* Initialize output method, it allocates direct buffers for us */
 509     if( p_vout->pf_init( p_vout ) )
 510     {
 511         vlc_mutex_unlock( &p_vout->change_lock );
 512         return VLC_EGENERIC;
 513     }
 514
 515     if( !I_OUTPUTPICTURES )
 516     {
 517         msg_Err( p_vout, "plugin was unable to allocate at least "
 518                          "one direct buffer" );
 519         p_vout->pf_end( p_vout );
 520         vlc_mutex_unlock( &p_vout->change_lock );
 521         return VLC_EGENERIC;
 522     }
 523
 524     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 525     {
 526         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 527                          "our internal buffers must have overflown." );
 528         p_vout->pf_end( p_vout );
 529         vlc_mutex_unlock( &p_vout->change_lock );
 530         return VLC_EGENERIC;
 531     }
 532
 533     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 534
 535     AspectRatio( p_vout->fmt_render.i_aspect, &i_aspect_x, &i_aspect_y );
 536
 537     msg_Dbg( p_vout, "picture in %ix%i (%i,%i,%ix%i), "
 538              "chroma %4.4s, ar %i:%i, sar %i:%i",
 539              p_vout->fmt_render.i_width, p_vout->fmt_render.i_height,
 540              p_vout->fmt_render.i_x_offset, p_vout->fmt_render.i_y_offset,
 541              p_vout->fmt_render.i_visible_width,
 542              p_vout->fmt_render.i_visible_height,
 543              (char*)&p_vout->fmt_render.i_chroma,
 544              i_aspect_x, i_aspect_y,
 545              p_vout->fmt_render.i_sar_num, p_vout->fmt_render.i_sar_den );
 546
 547     AspectRatio( p_vout->fmt_in.i_aspect, &i_aspect_x, &i_aspect_y );
 548
 549     msg_Dbg( p_vout, "picture user %ix%i (%i,%i,%ix%i), "
 550              "chroma %4.4s, ar %i:%i, sar %i:%i",
 551              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
 552              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
 553              p_vout->fmt_in.i_visible_width,
 554              p_vout->fmt_in.i_visible_height,
 555              (char*)&p_vout->fmt_in.i_chroma,
 556              i_aspect_x, i_aspect_y,
 557              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
 558
 559     if( !p_vout->fmt_out.i_width || !p_vout->fmt_out.i_height )
 560     {
 561         p_vout->fmt_out.i_width = p_vout->fmt_out.i_visible_width =
 562             p_vout->output.i_width;
 563         p_vout->fmt_out.i_height = p_vout->fmt_out.i_visible_height =
 564             p_vout->output.i_height;
 565         p_vout->fmt_out.i_x_offset =  p_vout->fmt_out.i_y_offset = 0;
 566
 567         p_vout->fmt_out.i_aspect = p_vout->output.i_aspect;
 568         p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 569     }
 570     if( !p_vout->fmt_out.i_sar_num || !p_vout->fmt_out.i_sar_num )
 571     {
 572         p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_aspect *
 573             p_vout->fmt_out.i_height;
 574         p_vout->fmt_out.i_sar_den = VOUT_ASPECT_FACTOR *
 575             p_vout->fmt_out.i_width;
 576     }
 577
 578     vlc_ureduce( &p_vout->fmt_out.i_sar_num, &p_vout->fmt_out.i_sar_den,
 579                  p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den, 0 );
 580
 581     AspectRatio( p_vout->fmt_out.i_aspect, &i_aspect_x, &i_aspect_y );
 582
 583     msg_Dbg( p_vout, "picture out %ix%i (%i,%i,%ix%i), "
 584              "chroma %4.4s, ar %i:%i, sar %i:%i",
 585              p_vout->fmt_out.i_width, p_vout->fmt_out.i_height,
 586              p_vout->fmt_out.i_x_offset, p_vout->fmt_out.i_y_offset,
 587              p_vout->fmt_out.i_visible_width,
 588              p_vout->fmt_out.i_visible_height,
 589              (char*)&p_vout->fmt_out.i_chroma,
 590              i_aspect_x, i_aspect_y,
 591              p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den );
 592
 593     /* Calculate shifts from system-updated masks */
 594     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 595                  p_vout->output.i_rmask );
 596     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 597                  p_vout->output.i_gmask );
 598     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 599                  p_vout->output.i_bmask );
 600
 601     /* Check whether we managed to create direct buffers similar to
 602      * the render buffers, ie same size and chroma */
 603     if( ( p_vout->output.i_width == p_vout->render.i_width )
 604      && ( p_vout->output.i_height == p_vout->render.i_height )
 605      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 606     {
 607         /* Cool ! We have direct buffers, we can ask the decoder to
 608          * directly decode into them ! Map the first render buffers to
 609          * the first direct buffers, but keep the first direct buffer
 610          * for memcpy operations */
 611         p_vout->b_direct = 1;
 612
 613         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 614         {
 615             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 616                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 617                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 618             {
 619                 /* We have enough direct buffers so there's no need to
 620                  * try to use system memory buffers. */
 621                 break;
 622             }
 623             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 624             I_RENDERPICTURES++;
 625         }
 626
 627         msg_Dbg( p_vout, "direct render, mapping "
 628                  "render pictures 0-%i to system pictures 1-%i",
 629                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 630     }
 631     else
 632     {
 633         /* Rats... Something is wrong here, we could not find an output
 634          * plugin able to directly render what we decode. See if we can
 635          * find a chroma plugin to do the conversion */
 636         p_vout->b_direct = 0;
 637
 638         /* Choose the best module */
 639         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 640
 641         if( p_vout->chroma.p_module == NULL )
 642         {
 643             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 644                      (char*)&p_vout->render.i_chroma,
 645                      (char*)&p_vout->output.i_chroma );
 646             p_vout->pf_end( p_vout );
 647             vlc_mutex_unlock( &p_vout->change_lock );
 648             return VLC_EGENERIC;
 649         }
 650
 651         msg_Dbg( p_vout, "indirect render, mapping "
 652                  "render pictures 0-%i to system pictures %i-%i",
 653                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 654                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 655
 656         /* Append render buffers after the direct buffers */
 657         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 658         {
 659             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 660             I_RENDERPICTURES++;
 661
 662             /* Check if we have enough render pictures */
 663             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 664                 break;
 665         }
 666     }
 667
 668     /* Link pictures back to their heap */
 669     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 670     {
 671         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 672     }
 673
 674     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 675     {
 676         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 677     }
 678
 679 /* XXX XXX mark thread ready */
 680     return VLC_SUCCESS;
 681 }
 682
 683 /*****************************************************************************
 684  * RunThread: video output thread
 685  *****************************************************************************
 686  * Video output thread. This function does only returns when the thread is
 687  * terminated. It handles the pictures arriving in the video heap and the
 688  * display device events.
 689  *****************************************************************************/
 690 static void RunThread( vout_thread_t *p_vout)
 691 {
 692     int             i_index;                                /* index in heap */
 693     int             i_idle_loops = 0;  /* loops without displaying a picture */
 694     mtime_t         current_date;                            /* current date */
 695     mtime_t         display_date;                            /* display date */
 696
 697     picture_t *     p_picture;                            /* picture pointer */
 698     picture_t *     p_last_picture = NULL;                   /* last picture */
 699     picture_t *     p_directbuffer;              /* direct buffer to display */
 700
 701     subpicture_t *  p_subpic = NULL;                   /* subpicture pointer */
 702
 703     /*
 704      * Initialize thread
 705      */
 706     p_vout->b_error = InitThread( p_vout );
 707
 708     /* signal the creation of the vout */
 709     vlc_thread_ready( p_vout );
 710
 711     if( p_vout->b_error )
 712     {
 713         /* Destroy thread structures allocated by Create and InitThread */
 714         DestroyThread( p_vout );
 715         return;
 716     }
 717
 718     /*
 719      * Main loop - it is not executed if an error occurred during
 720      * initialization
 721      */
 722     while( (!p_vout->b_die) && (!p_vout->b_error) )
 723     {
 724         /* Initialize loop variables */
 725         p_picture = NULL;
 726         display_date = 0;
 727         current_date = mdate();
 728
 729 #if 0
 730         p_vout->c_loops++;
 731         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 732         {
 733             msg_Dbg( p_vout, "picture heap: %d/%d",
 734                      I_RENDERPICTURES, p_vout->i_heap_size );
 735         }
 736 #endif
 737
 738         /*
 739          * Find the picture to display (the one with the earliest date).
 740          * This operation does not need lock, since only READY_PICTUREs
 741          * are handled. */
 742         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 743         {
 744             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 745                 && ( (p_picture == NULL) ||
 746                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 747             {
 748                 p_picture = PP_RENDERPICTURE[i_index];
 749                 display_date = p_picture->date;
 750             }
 751         }
 752
 753         if( p_picture )
 754         {
 755             /* If we met the last picture, parse again to see whether there is
 756              * a more appropriate one. */
 757             if( p_picture == p_last_picture )
 758             {
 759                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 760                 {
 761                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 762                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 763                         && ((p_picture == p_last_picture) ||
 764                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 765                     {
 766                         p_picture = PP_RENDERPICTURE[i_index];
 767                         display_date = p_picture->date;
 768                     }
 769                 }
 770             }
 771
 772             /* If we found better than the last picture, destroy it */
 773             if( p_last_picture && p_picture != p_last_picture )
 774             {
 775                 vlc_mutex_lock( &p_vout->picture_lock );
 776                 if( p_last_picture->i_refcount )
 777                 {
 778                     p_last_picture->i_status = DISPLAYED_PICTURE;
 779                 }
 780                 else
 781                 {
 782                     p_last_picture->i_status = DESTROYED_PICTURE;
 783                     p_vout->i_heap_size--;
 784                 }
 785                 vlc_mutex_unlock( &p_vout->picture_lock );
 786                 p_last_picture = NULL;
 787             }
 788
 789             /* Compute FPS rate */
 790             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 791                 = display_date;
 792
 793             /* XXX: config_GetInt is slow, but this kind of frame dropping
 794              * should not happen that often. */
 795             if( !p_picture->b_force &&
 796                 p_picture != p_last_picture &&
 797                 display_date < current_date + p_vout->render_time &&
 798                 config_GetInt( p_vout, "skip-frames" ) )
 799             {
 800                 /* Picture is late: it will be destroyed and the thread
 801                  * will directly choose the next picture */
 802                 vlc_mutex_lock( &p_vout->picture_lock );
 803                 if( p_picture->i_refcount )
 804                 {
 805                     /* Pretend we displayed the picture, but don't destroy
 806                      * it since the decoder might still need it. */
 807                     p_picture->i_status = DISPLAYED_PICTURE;
 808                 }
 809                 else
 810                 {
 811                     /* Destroy the picture without displaying it */
 812                     p_picture->i_status = DESTROYED_PICTURE;
 813                     p_vout->i_heap_size--;
 814                 }
 815                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 816                                   current_date - display_date );
 817                 stats_UpdateInteger( p_vout, "lost_pictures", 1 );
 818                 vlc_mutex_unlock( &p_vout->picture_lock );
 819
 820                 continue;
 821             }
 822
 823             if( display_date >
 824                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 825             {
 826                 /* Picture is waaay too early: it will be destroyed */
 827                 vlc_mutex_lock( &p_vout->picture_lock );
 828                 if( p_picture->i_refcount )
 829                 {
 830                     /* Pretend we displayed the picture, but don't destroy
 831                      * it since the decoder might still need it. */
 832                     p_picture->i_status = DISPLAYED_PICTURE;
 833                 }
 834                 else
 835                 {
 836                     /* Destroy the picture without displaying it */
 837                     p_picture->i_status = DESTROYED_PICTURE;
 838                     p_vout->i_heap_size--;
 839                 }
 840                 stats_UpdateInteger( p_vout, "lost_pictures", 1 );
 841                 msg_Warn( p_vout, "vout warning: early picture skipped "
 842                           "("I64Fd")", display_date - current_date
 843                           - p_vout->i_pts_delay );
 844                 vlc_mutex_unlock( &p_vout->picture_lock );
 845
 846                 continue;
 847             }
 848
 849             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 850             {
 851                 /* A picture is ready to be rendered, but its rendering date
 852                  * is far from the current one so the thread will perform an
 853                  * empty loop as if no picture were found. The picture state
 854                  * is unchanged */
 855                 p_picture    = NULL;
 856                 display_date = 0;
 857             }
 858             else if( p_picture == p_last_picture )
 859             {
 860                 /* We are asked to repeat the previous picture, but we first
 861                  * wait for a couple of idle loops */
 862                 if( i_idle_loops < 4 )
 863                 {
 864                     p_picture    = NULL;
 865                     display_date = 0;
 866                 }
 867                 else
 868                 {
 869                     /* We set the display date to something high, otherwise
 870                      * we'll have lots of problems with late pictures */
 871                     display_date = current_date + p_vout->render_time;
 872                 }
 873             }
 874         }
 875
 876         if( p_picture == NULL )
 877         {
 878             i_idle_loops++;
 879         }
 880
 881         if( p_picture && p_vout->b_snapshot )
 882         {
 883             p_vout->b_snapshot = VLC_FALSE;
 884             vout_Snapshot( p_vout, p_picture );
 885         }
 886
 887         /*
 888          * Check for subpictures to display
 889          */
 890         if( display_date > 0 )
 891         {
 892             p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 893         }
 894
 895         /*
 896          * Perform rendering
 897          */
 898         stats_UpdateInteger( p_vout, "displayed_pictures", 1 );
 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             /* Tell the vout this was the last picture and that it does not
 962              * need to be forced anymore. */
 963             p_last_picture = p_picture;
 964             p_last_picture->b_force = 0;
 965         }
 966
 967         if( p_picture != NULL )
 968         {
 969             /* Reinitialize idle loop count */
 970             i_idle_loops = 0;
 971         }
 972
 973         /*
 974          * Check events and manage thread
 975          */
 976         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 977         {
 978             /* A fatal error occurred, and the thread must terminate
 979              * immediately, without displaying anything - setting b_error to 1
 980              * causes the immediate end of the main while() loop. */
 981             p_vout->b_error = 1;
 982         }
 983
 984         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 985         {
 986             /* this must only happen when the vout plugin is incapable of
 987              * rescaling the picture itself. In this case we need to destroy
 988              * the current picture buffers and recreate new ones with the right
 989              * dimensions */
 990             int i;
 991
 992             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 993
 994             p_vout->pf_end( p_vout );
 995             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 996                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 997
 998             I_OUTPUTPICTURES = 0;
 999             if( p_vout->pf_init( p_vout ) )
1000             {
1001                 msg_Err( p_vout, "cannot resize display" );
1002                 /* FIXME: pf_end will be called again in EndThread() */
1003                 p_vout->b_error = 1;
1004             }
1005
1006             /* Need to reinitialise the chroma plugin */
1007             if( p_vout->chroma.p_module )
1008             {
1009                 if( p_vout->chroma.p_module->pf_deactivate )
1010                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1011                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1012             }
1013         }
1014
1015         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1016         {
1017             /* This happens when the picture buffers need to be recreated.
1018              * This is useful on multimonitor displays for instance.
1019              *
1020              * Warning: This only works when the vout creates only 1 picture
1021              * buffer!! */
1022             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1023
1024             if( !p_vout->b_direct )
1025             {
1026                 module_Unneed( p_vout, p_vout->chroma.p_module );
1027             }
1028
1029             vlc_mutex_lock( &p_vout->picture_lock );
1030
1031             p_vout->pf_end( p_vout );
1032
1033             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1034
1035             p_vout->b_error = InitThread( p_vout );
1036
1037             vlc_mutex_unlock( &p_vout->picture_lock );
1038         }
1039     }
1040
1041     /*
1042      * Error loop - wait until the thread destruction is requested
1043      */
1044     if( p_vout->b_error )
1045     {
1046         ErrorThread( p_vout );
1047     }
1048
1049     /* End of thread */
1050     EndThread( p_vout );
1051
1052     /* Destroy thread structures allocated by CreateThread */
1053     DestroyThread( p_vout );
1054 }
1055
1056 /*****************************************************************************
1057  * ErrorThread: RunThread() error loop
1058  *****************************************************************************
1059  * This function is called when an error occurred during thread main's loop.
1060  * The thread can still receive feed, but must be ready to terminate as soon
1061  * as possible.
1062  *****************************************************************************/
1063 static void ErrorThread( vout_thread_t *p_vout )
1064 {
1065     /* Wait until a `die' order */
1066     while( !p_vout->b_die )
1067     {
1068         /* Sleep a while */
1069         msleep( VOUT_IDLE_SLEEP );
1070     }
1071 }
1072
1073 /*****************************************************************************
1074  * EndThread: thread destruction
1075  *****************************************************************************
1076  * This function is called when the thread ends after a sucessful
1077  * initialization. It frees all resources allocated by InitThread.
1078  *****************************************************************************/
1079 static void EndThread( vout_thread_t *p_vout )
1080 {
1081     int     i_index;                                        /* index in heap */
1082
1083 #ifdef STATS
1084     {
1085         struct tms cpu_usage;
1086         times( &cpu_usage );
1087
1088         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1089                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1090     }
1091 #endif
1092
1093     if( !p_vout->b_direct )
1094     {
1095         module_Unneed( p_vout, p_vout->chroma.p_module );
1096     }
1097
1098     /* Destroy all remaining pictures */
1099     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1100     {
1101         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1102         {
1103             free( p_vout->p_picture[i_index].p_data_orig );
1104         }
1105     }
1106
1107     /* Destroy subpicture unit */
1108     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1109     spu_Destroy( p_vout->p_spu );
1110
1111     /* Destroy translation tables */
1112     p_vout->pf_end( p_vout );
1113
1114     /* Release the change lock */
1115     vlc_mutex_unlock( &p_vout->change_lock );
1116 }
1117
1118 /*****************************************************************************
1119  * DestroyThread: thread destruction
1120  *****************************************************************************
1121  * This function is called when the thread ends. It frees all ressources
1122  * allocated by CreateThread. Status is available at this stage.
1123  *****************************************************************************/
1124 static void DestroyThread( vout_thread_t *p_vout )
1125 {
1126     /* Destroy the locks */
1127     vlc_mutex_destroy( &p_vout->picture_lock );
1128     vlc_mutex_destroy( &p_vout->change_lock );
1129
1130     /* Release the module */
1131     if( p_vout && p_vout->p_module )
1132     {
1133         module_Unneed( p_vout, p_vout->p_module );
1134     }
1135 }
1136
1137 /* following functions are local */
1138
1139 static int ReduceHeight( int i_ratio )
1140 {
1141     int i_dummy = VOUT_ASPECT_FACTOR;
1142     int i_pgcd  = 1;
1143
1144     if( !i_ratio )
1145     {
1146         return i_pgcd;
1147     }
1148
1149     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1150     while( !(i_ratio & 1) && !(i_dummy & 1) )
1151     {
1152         i_ratio >>= 1;
1153         i_dummy >>= 1;
1154         i_pgcd  <<= 1;
1155     }
1156
1157     while( !(i_ratio % 3) && !(i_dummy % 3) )
1158     {
1159         i_ratio /= 3;
1160         i_dummy /= 3;
1161         i_pgcd  *= 3;
1162     }
1163
1164     while( !(i_ratio % 5) && !(i_dummy % 5) )
1165     {
1166         i_ratio /= 5;
1167         i_dummy /= 5;
1168         i_pgcd  *= 5;
1169     }
1170
1171     return i_pgcd;
1172 }
1173
1174 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1175 {
1176     unsigned int i_pgcd = ReduceHeight( i_aspect );
1177     *i_aspect_x = i_aspect / i_pgcd;
1178     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1179 }
1180
1181 /*****************************************************************************
1182  * BinaryLog: computes the base 2 log of a binary value
1183  *****************************************************************************
1184  * This functions is used by MaskToShift, to get a bit index from a binary
1185  * value.
1186  *****************************************************************************/
1187 static int BinaryLog( uint32_t i )
1188 {
1189     int i_log = 0;
1190
1191     if( i == 0 ) return -31337;
1192
1193     if( i & 0xffff0000 ) i_log += 16;
1194     if( i & 0xff00ff00 ) i_log += 8;
1195     if( i & 0xf0f0f0f0 ) i_log += 4;
1196     if( i & 0xcccccccc ) i_log += 2;
1197     if( i & 0xaaaaaaaa ) i_log += 1;
1198
1199     return i_log;
1200 }
1201
1202 /*****************************************************************************
1203  * MaskToShift: transform a color mask into right and left shifts
1204  *****************************************************************************
1205  * This function is used for obtaining color shifts from masks.
1206  *****************************************************************************/
1207 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1208 {
1209     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1210
1211     if( !i_mask )
1212     {
1213         *pi_left = *pi_right = 0;
1214         return;
1215     }
1216
1217     /* Get bits */
1218     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1219     i_high = i_mask + i_low;                       /* higher bit of the mask */
1220
1221     /* Transform bits into an index */
1222     i_low =  BinaryLog (i_low);
1223     i_high = BinaryLog (i_high);
1224
1225     /* Update pointers and return */
1226     *pi_left =   i_low;
1227     *pi_right = (8 - i_high + i_low);
1228 }
1229
1230 /*****************************************************************************
1231  * vout_VarCallback: generic callback for intf variables
1232  *****************************************************************************/
1233 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1234                       vlc_value_t old_value, vlc_value_t new_value,
1235                       void * unused )
1236 {
1237     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1238     vlc_value_t val;
1239     val.b_bool = VLC_TRUE;
1240     var_Set( p_vout, "intf-change", val );
1241     return VLC_SUCCESS;
1242 }
1243
1244 /*****************************************************************************
1245  * Helper thread for object variables callbacks.
1246  * Only used to avoid deadlocks when using the video embedded mode.
1247  *****************************************************************************/
1248 typedef struct suxor_thread_t
1249 {
1250     VLC_COMMON_MEMBERS
1251     input_thread_t *p_input;
1252
1253 } suxor_thread_t;
1254
1255 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1256 {
1257     vlc_value_t val;
1258
1259     vlc_thread_ready( p_this );
1260
1261     /* Now restart current video stream */
1262     var_Get( p_this->p_input, "video-es", &val );
1263     if( val.i_int >= 0 )
1264     {
1265         vlc_value_t val_es;
1266         val_es.i_int = -VIDEO_ES;
1267         var_Set( p_this->p_input, "video-es", val_es );
1268         var_Set( p_this->p_input, "video-es", val );
1269     }
1270
1271     vlc_object_release( p_this->p_input );
1272
1273 #ifdef WIN32
1274     CloseHandle( p_this->thread_id );
1275 #endif
1276
1277     vlc_object_destroy( p_this );
1278 }
1279
1280 /*****************************************************************************
1281  * object variables callbacks: a bunch of object variables are used by the
1282  * interfaces to interact with the vout.
1283  *****************************************************************************/
1284 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1285                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1286 {
1287     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1288     input_thread_t *p_input;
1289     vlc_value_t val;
1290
1291     char *psz_mode = newval.psz_string;
1292     char *psz_filter, *psz_deinterlace = NULL;
1293
1294     var_Get( p_vout, "vout-filter", &val );
1295     psz_filter = val.psz_string;
1296     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1297
1298     if( !psz_mode || !*psz_mode )
1299     {
1300         if( psz_deinterlace )
1301         {
1302             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1303             if( psz_src[0] == ':' ) psz_src++;
1304             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1305         }
1306     }
1307     else if( !psz_deinterlace )
1308     {
1309         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1310                               sizeof(":deinterlace") );
1311         if( psz_filter && *psz_filter ) strcat( psz_filter, ":" );
1312         strcat( psz_filter, "deinterlace" );
1313     }
1314
1315     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1316                                                  FIND_PARENT );
1317     if( !p_input ) return VLC_EGENERIC;
1318
1319     if( psz_mode && *psz_mode )
1320     {
1321         /* Modify input as well because the vout might have to be restarted */
1322         val.psz_string = psz_mode;
1323         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1324         var_Set( p_input, "deinterlace-mode", val );
1325     }
1326     vlc_object_release( p_input );
1327
1328     val.b_bool = VLC_TRUE;
1329     var_Set( p_vout, "intf-change", val );
1330
1331     val.psz_string = psz_filter;
1332     var_Set( p_vout, "vout-filter", val );
1333     if( psz_filter ) free( psz_filter );
1334
1335     return VLC_SUCCESS;
1336 }
1337
1338 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1339                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1340 {
1341     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1342     input_thread_t *p_input;
1343     vlc_value_t val;
1344
1345     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1346                                                  FIND_PARENT );
1347     if (!p_input)
1348     {
1349         msg_Err( p_vout, "Input not found" );
1350         return( VLC_EGENERIC );
1351     }
1352
1353     val.b_bool = VLC_TRUE;
1354     var_Set( p_vout, "intf-change", val );
1355
1356     /* Modify input as well because the vout might have to be restarted */
1357     val.psz_string = newval.psz_string;
1358     var_Create( p_input, "vout-filter", VLC_VAR_STRING );
1359
1360     var_Set( p_input, "vout-filter", val );
1361
1362     /* Now restart current video stream */
1363     var_Get( p_input, "video-es", &val );
1364     if( val.i_int >= 0 )
1365     {
1366         suxor_thread_t *p_suxor =
1367             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1368         p_suxor->p_input = p_input;
1369         p_vout->b_filter_change = VLC_TRUE;
1370         vlc_object_yield( p_input );
1371         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1372                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1373     }
1374
1375     vlc_object_release( p_input );
1376
1377     return VLC_SUCCESS;
1378 }