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., 59 Temple Place - Suite 330, Boston, MA  02111, 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 static void     InitWindowSize    ( vout_thread_t *, unsigned *, unsigned * );
  63
  64 /* Object variables callbacks */
  65 static int DeinterlaceCallback( vlc_object_t *, char const *,
  66                                 vlc_value_t, vlc_value_t, void * );
  67 static int FilterCallback( vlc_object_t *, char const *,
  68                            vlc_value_t, vlc_value_t, void * );
  69
  70 /* From vout_intf.c */
  71 int vout_Snapshot( vout_thread_t *, picture_t * );
  72
  73 /*****************************************************************************
  74  * vout_Request: find a video output thread, create one, or destroy one.
  75  *****************************************************************************
  76  * This function looks for a video output thread matching the current
  77  * properties. If not found, it spawns a new one.
  78  *****************************************************************************/
  79 vout_thread_t *__vout_Request( vlc_object_t *p_this, vout_thread_t *p_vout,
  80                                video_format_t *p_fmt )
  81 {
  82     if( !p_fmt )
  83     {
  84         /* Reattach video output to input before bailing out */
  85         if( p_vout )
  86         {
  87             vlc_object_t *p_playlist;
  88
  89             p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
  90                                           FIND_ANYWHERE );
  91
  92             if( p_playlist )
  93             {
  94                 spu_Attach( p_vout->p_spu, p_this, VLC_FALSE );
  95                 vlc_object_detach( p_vout );
  96                 vlc_object_attach( p_vout, p_playlist );
  97
  98                 vlc_object_release( p_playlist );
  99             }
 100             else
 101             {
 102                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 103                 vlc_object_detach( p_vout );
 104                 vout_Destroy( p_vout );
 105             }
 106         }
 107         return NULL;
 108     }
 109
 110     /* If a video output was provided, lock it, otherwise look for one. */
 111     if( p_vout )
 112     {
 113         vlc_object_yield( p_vout );
 114     }
 115     else
 116     {
 117         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 118
 119         if( !p_vout )
 120         {
 121             playlist_t *p_playlist;
 122
 123             p_playlist = vlc_object_find( p_this,
 124                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 125             if( p_playlist )
 126             {
 127                 vlc_mutex_lock( &p_playlist->gc_lock );
 128                 p_vout = vlc_object_find( p_playlist,
 129                                           VLC_OBJECT_VOUT, FIND_CHILD );
 130                 /* only first children of p_input for unused vout */
 131                 if( p_vout && p_vout->p_parent != (vlc_object_t *)p_playlist )
 132                 {
 133                     vlc_object_release( p_vout );
 134                     p_vout = NULL;
 135                 }
 136                 vlc_mutex_unlock( &p_playlist->gc_lock );
 137                 vlc_object_release( p_playlist );
 138             }
 139         }
 140     }
 141
 142     /* If we now have a video output, check it has the right properties */
 143     if( p_vout )
 144     {
 145         char *psz_filter_chain;
 146         vlc_value_t val;
 147
 148         /* We don't directly check for the "vout-filter" variable for obvious
 149          * performance reasons. */
 150         if( p_vout->b_filter_change )
 151         {
 152             var_Get( p_vout, "vout-filter", &val );
 153             psz_filter_chain = val.psz_string;
 154
 155             if( psz_filter_chain && !*psz_filter_chain )
 156             {
 157                 free( psz_filter_chain );
 158                 psz_filter_chain = NULL;
 159             }
 160             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 161             {
 162                 free( p_vout->psz_filter_chain );
 163                 p_vout->psz_filter_chain = NULL;
 164             }
 165
 166             if( !psz_filter_chain && !p_vout->psz_filter_chain )
 167             {
 168                 p_vout->b_filter_change = VLC_FALSE;
 169             }
 170
 171             if( psz_filter_chain ) free( psz_filter_chain );
 172         }
 173
 174         if( ( p_vout->fmt_render.i_width != p_fmt->i_width ) ||
 175             ( p_vout->fmt_render.i_height != p_fmt->i_height ) ||
 176             ( p_vout->fmt_render.i_chroma != p_fmt->i_chroma ) ||
 177             ( p_vout->fmt_render.i_aspect != p_fmt->i_aspect
 178                     && !p_vout->b_override_aspect ) ||
 179             p_vout->b_filter_change )
 180         {
 181             /* We are not interested in this format, close this vout */
 182             vlc_object_detach( p_vout );
 183             vlc_object_release( p_vout );
 184             vout_Destroy( p_vout );
 185             p_vout = NULL;
 186         }
 187         else
 188         {
 189             /* This video output is cool! Hijack it. */
 190             vlc_object_detach( p_vout );
 191             spu_Attach( p_vout->p_spu, p_this, VLC_TRUE );
 192             vlc_object_attach( p_vout, p_this );
 193             vlc_object_release( p_vout );
 194         }
 195     }
 196
 197     if( !p_vout )
 198     {
 199         msg_Dbg( p_this, "no usable vout present, spawning one" );
 200
 201         p_vout = vout_Create( p_this, p_fmt );
 202     }
 203
 204     return p_vout;
 205 }
 206
 207 /*****************************************************************************
 208  * vout_Create: creates a new video output thread
 209  *****************************************************************************
 210  * This function creates a new video output thread, and returns a pointer
 211  * to its description. On error, it returns NULL.
 212  *****************************************************************************/
 213 vout_thread_t * __vout_Create( vlc_object_t *p_parent, video_format_t *p_fmt )
 214 {
 215     vout_thread_t  * p_vout;                            /* thread descriptor */
 216     input_thread_t * p_input_thread;
 217     int              i_index;                               /* loop variable */
 218     char           * psz_plugin;
 219     vlc_value_t      val, text;
 220
 221     unsigned int i_width = p_fmt->i_width;
 222     unsigned int i_height = p_fmt->i_height;
 223     vlc_fourcc_t i_chroma = p_fmt->i_chroma;
 224     unsigned int i_aspect = p_fmt->i_aspect;
 225
 226     /* Allocate descriptor */
 227     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 228     if( p_vout == NULL )
 229     {
 230         msg_Err( p_parent, "out of memory" );
 231         return NULL;
 232     }
 233
 234     /* Initialize pictures - translation tables and functions
 235      * will be initialized later in InitThread */
 236     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++)
 237     {
 238         p_vout->p_picture[i_index].pf_lock = NULL;
 239         p_vout->p_picture[i_index].pf_unlock = NULL;
 240         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 241         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 242         p_vout->p_picture[i_index].b_slow   = 0;
 243     }
 244
 245     /* No images in the heap */
 246     p_vout->i_heap_size = 0;
 247
 248     /* Initialize the rendering heap */
 249     I_RENDERPICTURES = 0;
 250     p_vout->fmt_render        = *p_fmt;   /* FIXME palette */
 251     p_vout->fmt_in            = *p_fmt;   /* FIXME palette */
 252     p_vout->render.i_width    = i_width;
 253     p_vout->render.i_height   = i_height;
 254     p_vout->render.i_chroma   = i_chroma;
 255     p_vout->render.i_aspect   = i_aspect;
 256
 257     p_vout->render.i_rmask    = 0;
 258     p_vout->render.i_gmask    = 0;
 259     p_vout->render.i_bmask    = 0;
 260
 261     p_vout->render.i_last_used_pic = -1;
 262     p_vout->render.b_allow_modify_pics = 1;
 263
 264     /* Zero the output heap */
 265     I_OUTPUTPICTURES = 0;
 266     p_vout->output.i_width    = 0;
 267     p_vout->output.i_height   = 0;
 268     p_vout->output.i_chroma   = 0;
 269     p_vout->output.i_aspect   = 0;
 270
 271     p_vout->output.i_rmask    = 0;
 272     p_vout->output.i_gmask    = 0;
 273     p_vout->output.i_bmask    = 0;
 274
 275     /* Initialize misc stuff */
 276     p_vout->i_changes    = 0;
 277     p_vout->f_gamma      = 0;
 278     p_vout->b_grayscale  = 0;
 279     p_vout->b_info       = 0;
 280     p_vout->b_interface  = 0;
 281     p_vout->b_scale      = 1;
 282     p_vout->b_fullscreen = 0;
 283     p_vout->i_alignment  = 0;
 284     p_vout->render_time  = 10;
 285     p_vout->c_fps_samples = 0;
 286     p_vout->b_filter_change = 0;
 287     p_vout->pf_control = 0;
 288     p_vout->p_parent_intf = 0;
 289     p_vout->i_par_num = p_vout->i_par_den = 1;
 290
 291     /* Initialize locks */
 292     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 293     vlc_mutex_init( p_vout, &p_vout->change_lock );
 294
 295     /* Mouse coordinates */
 296     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 297     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 298     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 299     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 300     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 301
 302     /* Initialize subpicture unit */
 303     p_vout->p_spu = spu_Create( p_vout );
 304     spu_Attach( p_vout->p_spu, p_parent, VLC_TRUE );
 305
 306     /* Attach the new object now so we can use var inheritance below */
 307     vlc_object_attach( p_vout, p_parent );
 308
 309     spu_Init( p_vout->p_spu );
 310
 311     /* Take care of some "interface/control" related initialisations */
 312     vout_IntfInit( p_vout );
 313
 314     p_vout->b_override_aspect = VLC_FALSE;
 315
 316     /* If the parent is not a VOUT object, that means we are at the start of
 317      * the video output pipe */
 318     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 319     {
 320         /* Look for the default filter configuration */
 321         var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 322         var_Get( p_vout, "vout-filter", &val );
 323         p_vout->psz_filter_chain = val.psz_string;
 324     }
 325     else
 326     {
 327         /* continue the parent's filter chain */
 328         char *psz_end;
 329
 330         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 331         if( psz_end && *(psz_end+1) )
 332             p_vout->psz_filter_chain = strdup( psz_end+1 );
 333         else p_vout->psz_filter_chain = NULL;
 334     }
 335
 336     /* Choose the video output module */
 337     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 338     {
 339         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 340         var_Get( p_vout, "vout", &val );
 341         psz_plugin = val.psz_string;
 342     }
 343     else
 344     {
 345         /* the filter chain is a string list of filters separated by double
 346          * colons */
 347         char *psz_end;
 348
 349         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 350         if( psz_end )
 351             psz_plugin = strndup( p_vout->psz_filter_chain,
 352                                   psz_end - p_vout->psz_filter_chain );
 353         else psz_plugin = strdup( p_vout->psz_filter_chain );
 354     }
 355
 356     /* Initialize the dimensions of the video window */
 357     InitWindowSize( p_vout, &p_vout->i_window_width,
 358                     &p_vout->i_window_height );
 359     msg_Dbg( p_vout, "Window size: %dx%d", p_vout->i_window_width,
 360              p_vout->i_window_height );
 361
 362     /* Create the vout thread */
 363     p_vout->p_module = module_Need( p_vout,
 364         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 365         "video filter" : "video output", psz_plugin, 0 );
 366
 367     if( psz_plugin ) free( psz_plugin );
 368     if( p_vout->p_module == NULL )
 369     {
 370         msg_Err( p_vout, "no suitable vout module" );
 371         vlc_object_detach( p_vout );
 372         vlc_object_destroy( p_vout );
 373         return NULL;
 374     }
 375
 376     /* Create a few object variables for interface interaction */
 377     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 378     text.psz_string = _("Deinterlace");
 379     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 380     val.psz_string = ""; text.psz_string = _("Disable");
 381     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 382     val.psz_string = "discard"; text.psz_string = _("Discard");
 383     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 384     val.psz_string = "blend"; text.psz_string = _("Blend");
 385     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 386     val.psz_string = "mean"; text.psz_string = _("Mean");
 387     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 388     val.psz_string = "bob"; text.psz_string = _("Bob");
 389     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 390     val.psz_string = "linear"; text.psz_string = _("Linear");
 391     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 392     val.psz_string = "x"; text.psz_string = "X";
 393     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 394
 395     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 396     {
 397         var_Set( p_vout, "deinterlace", val );
 398         if( val.psz_string ) free( val.psz_string );
 399     }
 400     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 401
 402
 403     var_Create( p_vout, "vout-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 404     text.psz_string = _("Filters");
 405     var_Change( p_vout, "vout-filter", VLC_VAR_SETTEXT, &text, NULL );
 406     var_AddCallback( p_vout, "vout-filter", FilterCallback, NULL );
 407
 408     /* Calculate delay created by internal caching */
 409     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 410                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 411     if( p_input_thread )
 412     {
 413         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 414         vlc_object_release( p_input_thread );
 415     }
 416     else
 417     {
 418         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 419     }
 420
 421     if( vlc_thread_create( p_vout, "video output", RunThread,
 422                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 423     {
 424         msg_Err( p_vout, "out of memory" );
 425         module_Unneed( p_vout, p_vout->p_module );
 426         vlc_object_detach( p_vout );
 427         vlc_object_destroy( p_vout );
 428         return NULL;
 429     }
 430
 431     if( p_vout->b_error )
 432     {
 433         msg_Err( p_vout, "video output creation failed" );
 434
 435         /* Make sure the thread is destroyed */
 436         p_vout->b_die = VLC_TRUE;
 437
 438         vlc_thread_join( p_vout );
 439
 440         vlc_object_detach( p_vout );
 441         vlc_object_destroy( p_vout );
 442         return NULL;
 443     }
 444
 445     return p_vout;
 446 }
 447
 448 /*****************************************************************************
 449  * vout_Destroy: destroys a previously created video output
 450  *****************************************************************************
 451  * Destroy a terminated thread.
 452  * The function will request a destruction of the specified thread. If pi_error
 453  * is NULL, it will return once the thread is destroyed. Else, it will be
 454  * update using one of the THREAD_* constants.
 455  *****************************************************************************/
 456 void vout_Destroy( vout_thread_t *p_vout )
 457 {
 458     vlc_object_t *p_playlist;
 459
 460     /* Request thread destruction */
 461     p_vout->b_die = VLC_TRUE;
 462     vlc_thread_join( p_vout );
 463
 464     var_Destroy( p_vout, "intf-change" );
 465
 466     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 467                                   FIND_ANYWHERE );
 468
 469     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 470
 471     /* Free structure */
 472     vlc_object_destroy( p_vout );
 473
 474     /* If it was the last vout, tell the interface to show up */
 475     if( p_playlist != NULL )
 476     {
 477         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 478                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 479         if( p_another_vout == NULL )
 480         {
 481             vlc_value_t val;
 482             val.b_bool = VLC_TRUE;
 483             var_Set( p_playlist, "intf-show", val );
 484         }
 485         else
 486         {
 487             vlc_object_release( p_another_vout );
 488         }
 489         vlc_object_release( p_playlist );
 490     }
 491 }
 492
 493 /*****************************************************************************
 494  * InitThread: initialize video output thread
 495  *****************************************************************************
 496  * This function is called from RunThread and performs the second step of the
 497  * initialization. It returns 0 on success. Note that the thread's flag are not
 498  * modified inside this function.
 499  *****************************************************************************/
 500 static int InitThread( vout_thread_t *p_vout )
 501 {
 502     int i, i_aspect_x, i_aspect_y;
 503
 504     vlc_mutex_lock( &p_vout->change_lock );
 505
 506 #ifdef STATS
 507     p_vout->c_loops = 0;
 508 #endif
 509
 510     /* Initialize output method, it allocates direct buffers for us */
 511     if( p_vout->pf_init( p_vout ) )
 512     {
 513         vlc_mutex_unlock( &p_vout->change_lock );
 514         return VLC_EGENERIC;
 515     }
 516
 517     if( !I_OUTPUTPICTURES )
 518     {
 519         msg_Err( p_vout, "plugin was unable to allocate at least "
 520                          "one direct buffer" );
 521         p_vout->pf_end( p_vout );
 522         vlc_mutex_unlock( &p_vout->change_lock );
 523         return VLC_EGENERIC;
 524     }
 525
 526     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 527     {
 528         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 529                          "our internal buffers must have overflown." );
 530         p_vout->pf_end( p_vout );
 531         vlc_mutex_unlock( &p_vout->change_lock );
 532         return VLC_EGENERIC;
 533     }
 534
 535     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 536
 537     AspectRatio( p_vout->fmt_render.i_aspect, &i_aspect_x, &i_aspect_y );
 538
 539     msg_Dbg( p_vout, "picture in %ix%i (%i,%i,%ix%i), "
 540              "chroma %4.4s, ar %i:%i, sar %i:%i",
 541              p_vout->fmt_render.i_width, p_vout->fmt_render.i_height,
 542              p_vout->fmt_render.i_x_offset, p_vout->fmt_render.i_y_offset,
 543              p_vout->fmt_render.i_visible_width,
 544              p_vout->fmt_render.i_visible_height,
 545              (char*)&p_vout->fmt_render.i_chroma,
 546              i_aspect_x, i_aspect_y,
 547              p_vout->fmt_render.i_sar_num, p_vout->fmt_render.i_sar_den );
 548
 549     AspectRatio( p_vout->fmt_in.i_aspect, &i_aspect_x, &i_aspect_y );
 550
 551     msg_Dbg( p_vout, "picture user %ix%i (%i,%i,%ix%i), "
 552              "chroma %4.4s, ar %i:%i, sar %i:%i",
 553              p_vout->fmt_in.i_width, p_vout->fmt_in.i_height,
 554              p_vout->fmt_in.i_x_offset, p_vout->fmt_in.i_y_offset,
 555              p_vout->fmt_in.i_visible_width,
 556              p_vout->fmt_in.i_visible_height,
 557              (char*)&p_vout->fmt_in.i_chroma,
 558              i_aspect_x, i_aspect_y,
 559              p_vout->fmt_in.i_sar_num, p_vout->fmt_in.i_sar_den );
 560
 561     if( !p_vout->fmt_out.i_width || !p_vout->fmt_out.i_height )
 562     {
 563         p_vout->fmt_out.i_width = p_vout->fmt_out.i_visible_width =
 564             p_vout->output.i_width;
 565         p_vout->fmt_out.i_height = p_vout->fmt_out.i_visible_height =
 566             p_vout->output.i_height;
 567         p_vout->fmt_out.i_x_offset =  p_vout->fmt_out.i_y_offset = 0;
 568
 569         p_vout->fmt_out.i_aspect = p_vout->output.i_aspect;
 570         p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 571     }
 572     if( !p_vout->fmt_out.i_sar_num || !p_vout->fmt_out.i_sar_num )
 573     {
 574         p_vout->fmt_out.i_sar_num = p_vout->fmt_out.i_aspect *
 575             p_vout->fmt_out.i_height;
 576         p_vout->fmt_out.i_sar_den = VOUT_ASPECT_FACTOR *
 577             p_vout->fmt_out.i_width;
 578     }
 579
 580     vlc_ureduce( &p_vout->fmt_out.i_sar_num, &p_vout->fmt_out.i_sar_den,
 581                  p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den, 0 );
 582
 583     AspectRatio( p_vout->fmt_out.i_aspect, &i_aspect_x, &i_aspect_y );
 584
 585     msg_Dbg( p_vout, "picture out %ix%i (%i,%i,%ix%i), "
 586              "chroma %4.4s, ar %i:%i, sar %i:%i",
 587              p_vout->fmt_out.i_width, p_vout->fmt_out.i_height,
 588              p_vout->fmt_out.i_x_offset, p_vout->fmt_out.i_y_offset,
 589              p_vout->fmt_out.i_visible_width,
 590              p_vout->fmt_out.i_visible_height,
 591              (char*)&p_vout->fmt_out.i_chroma,
 592              i_aspect_x, i_aspect_y,
 593              p_vout->fmt_out.i_sar_num, p_vout->fmt_out.i_sar_den );
 594
 595     /* Calculate shifts from system-updated masks */
 596     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 597                  p_vout->output.i_rmask );
 598     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 599                  p_vout->output.i_gmask );
 600     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 601                  p_vout->output.i_bmask );
 602
 603     /* Check whether we managed to create direct buffers similar to
 604      * the render buffers, ie same size and chroma */
 605     if( ( p_vout->output.i_width == p_vout->render.i_width )
 606      && ( p_vout->output.i_height == p_vout->render.i_height )
 607      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 608     {
 609         /* Cool ! We have direct buffers, we can ask the decoder to
 610          * directly decode into them ! Map the first render buffers to
 611          * the first direct buffers, but keep the first direct buffer
 612          * for memcpy operations */
 613         p_vout->b_direct = 1;
 614
 615         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 616         {
 617             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 618                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 619                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 620             {
 621                 /* We have enough direct buffers so there's no need to
 622                  * try to use system memory buffers. */
 623                 break;
 624             }
 625             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 626             I_RENDERPICTURES++;
 627         }
 628
 629         msg_Dbg( p_vout, "direct render, mapping "
 630                  "render pictures 0-%i to system pictures 1-%i",
 631                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 632     }
 633     else
 634     {
 635         /* Rats... Something is wrong here, we could not find an output
 636          * plugin able to directly render what we decode. See if we can
 637          * find a chroma plugin to do the conversion */
 638         p_vout->b_direct = 0;
 639
 640         /* Choose the best module */
 641         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 642
 643         if( p_vout->chroma.p_module == NULL )
 644         {
 645             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 646                      (char*)&p_vout->render.i_chroma,
 647                      (char*)&p_vout->output.i_chroma );
 648             p_vout->pf_end( p_vout );
 649             vlc_mutex_unlock( &p_vout->change_lock );
 650             return VLC_EGENERIC;
 651         }
 652
 653         msg_Dbg( p_vout, "indirect render, mapping "
 654                  "render pictures 0-%i to system pictures %i-%i",
 655                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 656                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 657
 658         /* Append render buffers after the direct buffers */
 659         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 660         {
 661             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 662             I_RENDERPICTURES++;
 663
 664             /* Check if we have enough render pictures */
 665             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 666                 break;
 667         }
 668     }
 669
 670     /* Link pictures back to their heap */
 671     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 672     {
 673         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 674     }
 675
 676     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 677     {
 678         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 679     }
 680
 681 /* XXX XXX mark thread ready */
 682     return VLC_SUCCESS;
 683 }
 684
 685 /*****************************************************************************
 686  * RunThread: video output thread
 687  *****************************************************************************
 688  * Video output thread. This function does only returns when the thread is
 689  * terminated. It handles the pictures arriving in the video heap and the
 690  * display device events.
 691  *****************************************************************************/
 692 static void RunThread( vout_thread_t *p_vout)
 693 {
 694     int             i_index;                                /* index in heap */
 695     int             i_idle_loops = 0;  /* loops without displaying a picture */
 696     mtime_t         current_date;                            /* current date */
 697     mtime_t         display_date;                            /* display date */
 698
 699     picture_t *     p_picture;                            /* picture pointer */
 700     picture_t *     p_last_picture = NULL;                   /* last picture */
 701     picture_t *     p_directbuffer;              /* direct buffer to display */
 702
 703     subpicture_t *  p_subpic = NULL;                   /* subpicture pointer */
 704
 705     /*
 706      * Initialize thread
 707      */
 708     p_vout->b_error = InitThread( p_vout );
 709
 710     /* signal the creation of the vout */
 711     vlc_thread_ready( p_vout );
 712
 713     if( p_vout->b_error )
 714     {
 715         /* Destroy thread structures allocated by Create and InitThread */
 716         DestroyThread( p_vout );
 717         return;
 718     }
 719
 720     /*
 721      * Main loop - it is not executed if an error occurred during
 722      * initialization
 723      */
 724     while( (!p_vout->b_die) && (!p_vout->b_error) )
 725     {
 726         /* Initialize loop variables */
 727         p_picture = NULL;
 728         display_date = 0;
 729         current_date = mdate();
 730
 731 #if 0
 732         p_vout->c_loops++;
 733         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 734         {
 735             msg_Dbg( p_vout, "picture heap: %d/%d",
 736                      I_RENDERPICTURES, p_vout->i_heap_size );
 737         }
 738 #endif
 739
 740         /*
 741          * Find the picture to display (the one with the earliest date).
 742          * This operation does not need lock, since only READY_PICTUREs
 743          * are handled. */
 744         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 745         {
 746             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 747                 && ( (p_picture == NULL) ||
 748                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 749             {
 750                 p_picture = PP_RENDERPICTURE[i_index];
 751                 display_date = p_picture->date;
 752             }
 753         }
 754
 755         if( p_picture )
 756         {
 757             /* If we met the last picture, parse again to see whether there is
 758              * a more appropriate one. */
 759             if( p_picture == p_last_picture )
 760             {
 761                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 762                 {
 763                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 764                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 765                         && ((p_picture == p_last_picture) ||
 766                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 767                     {
 768                         p_picture = PP_RENDERPICTURE[i_index];
 769                         display_date = p_picture->date;
 770                     }
 771                 }
 772             }
 773
 774             /* If we found better than the last picture, destroy it */
 775             if( p_last_picture && p_picture != p_last_picture )
 776             {
 777                 vlc_mutex_lock( &p_vout->picture_lock );
 778                 if( p_last_picture->i_refcount )
 779                 {
 780                     p_last_picture->i_status = DISPLAYED_PICTURE;
 781                 }
 782                 else
 783                 {
 784                     p_last_picture->i_status = DESTROYED_PICTURE;
 785                     p_vout->i_heap_size--;
 786                 }
 787                 vlc_mutex_unlock( &p_vout->picture_lock );
 788                 p_last_picture = NULL;
 789             }
 790
 791             /* Compute FPS rate */
 792             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 793                 = display_date;
 794
 795             if( !p_picture->b_force &&
 796                 p_picture != p_last_picture &&
 797                 display_date < current_date + p_vout->render_time )
 798             {
 799                 /* Picture is late: it will be destroyed and the thread
 800                  * will directly choose the next picture */
 801                 vlc_mutex_lock( &p_vout->picture_lock );
 802                 if( p_picture->i_refcount )
 803                 {
 804                     /* Pretend we displayed the picture, but don't destroy
 805                      * it since the decoder might still need it. */
 806                     p_picture->i_status = DISPLAYED_PICTURE;
 807                 }
 808                 else
 809                 {
 810                     /* Destroy the picture without displaying it */
 811                     p_picture->i_status = DESTROYED_PICTURE;
 812                     p_vout->i_heap_size--;
 813                 }
 814                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 815                                   current_date - display_date );
 816                 vlc_mutex_unlock( &p_vout->picture_lock );
 817
 818                 continue;
 819             }
 820
 821             if( display_date >
 822                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 823             {
 824                 /* Picture is waaay too early: it will be destroyed */
 825                 vlc_mutex_lock( &p_vout->picture_lock );
 826                 if( p_picture->i_refcount )
 827                 {
 828                     /* Pretend we displayed the picture, but don't destroy
 829                      * it since the decoder might still need it. */
 830                     p_picture->i_status = DISPLAYED_PICTURE;
 831                 }
 832                 else
 833                 {
 834                     /* Destroy the picture without displaying it */
 835                     p_picture->i_status = DESTROYED_PICTURE;
 836                     p_vout->i_heap_size--;
 837                 }
 838                 msg_Warn( p_vout, "vout warning: early picture skipped "
 839                           "("I64Fd")", display_date - current_date
 840                           - p_vout->i_pts_delay );
 841                 vlc_mutex_unlock( &p_vout->picture_lock );
 842
 843                 continue;
 844             }
 845
 846             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 847             {
 848                 /* A picture is ready to be rendered, but its rendering date
 849                  * is far from the current one so the thread will perform an
 850                  * empty loop as if no picture were found. The picture state
 851                  * is unchanged */
 852                 p_picture    = NULL;
 853                 display_date = 0;
 854             }
 855             else if( p_picture == p_last_picture )
 856             {
 857                 /* We are asked to repeat the previous picture, but we first
 858                  * wait for a couple of idle loops */
 859                 if( i_idle_loops < 4 )
 860                 {
 861                     p_picture    = NULL;
 862                     display_date = 0;
 863                 }
 864                 else
 865                 {
 866                     /* We set the display date to something high, otherwise
 867                      * we'll have lots of problems with late pictures */
 868                     display_date = current_date + p_vout->render_time;
 869                 }
 870             }
 871         }
 872
 873         if( p_picture == NULL )
 874         {
 875             i_idle_loops++;
 876         }
 877
 878         if( p_picture && p_vout->b_snapshot )
 879         {
 880             p_vout->b_snapshot = VLC_FALSE;
 881             vout_Snapshot( p_vout, p_picture );
 882         }
 883
 884         /*
 885          * Check for subpictures to display
 886          */
 887         if( display_date > 0 )
 888         {
 889             p_subpic = spu_SortSubpictures( p_vout->p_spu, display_date );
 890         }
 891
 892         /*
 893          * Perform rendering
 894          */
 895         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 896
 897         /*
 898          * Call the plugin-specific rendering method if there is one
 899          */
 900         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 901         {
 902             /* Render the direct buffer returned by vout_RenderPicture */
 903             p_vout->pf_render( p_vout, p_directbuffer );
 904         }
 905
 906         /*
 907          * Sleep, wake up
 908          */
 909         if( display_date != 0 && p_directbuffer != NULL )
 910         {
 911             mtime_t current_render_time = mdate() - current_date;
 912             /* if render time is very large we don't include it in the mean */
 913             if( current_render_time < p_vout->render_time +
 914                 VOUT_DISPLAY_DELAY )
 915             {
 916                 /* Store render time using a sliding mean weighting to
 917                  * current value in a 3 to 1 ratio*/
 918                 p_vout->render_time *= 3;
 919                 p_vout->render_time += current_render_time;
 920                 p_vout->render_time >>= 2;
 921             }
 922         }
 923
 924         /* Give back change lock */
 925         vlc_mutex_unlock( &p_vout->change_lock );
 926
 927         /* Sleep a while or until a given date */
 928         if( display_date != 0 )
 929         {
 930             /* If there are filters in the chain, better give them the picture
 931              * in advance */
 932             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 933             {
 934                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 935             }
 936         }
 937         else
 938         {
 939             msleep( VOUT_IDLE_SLEEP );
 940         }
 941
 942         /* On awakening, take back lock and send immediately picture
 943          * to display. */
 944         vlc_mutex_lock( &p_vout->change_lock );
 945
 946         /*
 947          * Display the previously rendered picture
 948          */
 949         if( p_picture != NULL && p_directbuffer != NULL )
 950         {
 951             /* Display the direct buffer returned by vout_RenderPicture */
 952             if( p_vout->pf_display )
 953             {
 954                 p_vout->pf_display( p_vout, p_directbuffer );
 955             }
 956
 957             /* Tell the vout this was the last picture and that it does not
 958              * need to be forced anymore. */
 959             p_last_picture = p_picture;
 960             p_last_picture->b_force = 0;
 961         }
 962
 963         if( p_picture != NULL )
 964         {
 965             /* Reinitialize idle loop count */
 966             i_idle_loops = 0;
 967         }
 968
 969         /*
 970          * Check events and manage thread
 971          */
 972         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 973         {
 974             /* A fatal error occurred, and the thread must terminate
 975              * immediately, without displaying anything - setting b_error to 1
 976              * causes the immediate end of the main while() loop. */
 977             p_vout->b_error = 1;
 978         }
 979
 980         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 981         {
 982             /* this must only happen when the vout plugin is incapable of
 983              * rescaling the picture itself. In this case we need to destroy
 984              * the current picture buffers and recreate new ones with the right
 985              * dimensions */
 986             int i;
 987
 988             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
 989
 990             p_vout->pf_end( p_vout );
 991             for( i = 0; i < I_OUTPUTPICTURES; i++ )
 992                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
 993
 994             I_OUTPUTPICTURES = 0;
 995             if( p_vout->pf_init( p_vout ) )
 996             {
 997                 msg_Err( p_vout, "cannot resize display" );
 998                 /* FIXME: pf_end will be called again in EndThread() */
 999                 p_vout->b_error = 1;
1000             }
1001
1002             /* Need to reinitialise the chroma plugin */
1003             if( p_vout->chroma.p_module )
1004             {
1005                 if( p_vout->chroma.p_module->pf_deactivate )
1006                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1007                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1008             }
1009         }
1010
1011         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1012         {
1013             /* This happens when the picture buffers need to be recreated.
1014              * This is useful on multimonitor displays for instance.
1015              *
1016              * Warning: This only works when the vout creates only 1 picture
1017              * buffer!! */
1018             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1019
1020             if( !p_vout->b_direct )
1021             {
1022                 module_Unneed( p_vout, p_vout->chroma.p_module );
1023             }
1024
1025             vlc_mutex_lock( &p_vout->picture_lock );
1026
1027             p_vout->pf_end( p_vout );
1028
1029             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1030
1031             p_vout->b_error = InitThread( p_vout );
1032
1033             vlc_mutex_unlock( &p_vout->picture_lock );
1034         }
1035     }
1036
1037     /*
1038      * Error loop - wait until the thread destruction is requested
1039      */
1040     if( p_vout->b_error )
1041     {
1042         ErrorThread( p_vout );
1043     }
1044
1045     /* End of thread */
1046     EndThread( p_vout );
1047
1048     /* Destroy thread structures allocated by CreateThread */
1049     DestroyThread( p_vout );
1050 }
1051
1052 /*****************************************************************************
1053  * ErrorThread: RunThread() error loop
1054  *****************************************************************************
1055  * This function is called when an error occurred during thread main's loop.
1056  * The thread can still receive feed, but must be ready to terminate as soon
1057  * as possible.
1058  *****************************************************************************/
1059 static void ErrorThread( vout_thread_t *p_vout )
1060 {
1061     /* Wait until a `die' order */
1062     while( !p_vout->b_die )
1063     {
1064         /* Sleep a while */
1065         msleep( VOUT_IDLE_SLEEP );
1066     }
1067 }
1068
1069 /*****************************************************************************
1070  * EndThread: thread destruction
1071  *****************************************************************************
1072  * This function is called when the thread ends after a sucessful
1073  * initialization. It frees all resources allocated by InitThread.
1074  *****************************************************************************/
1075 static void EndThread( vout_thread_t *p_vout )
1076 {
1077     int     i_index;                                        /* index in heap */
1078
1079 #ifdef STATS
1080     {
1081         struct tms cpu_usage;
1082         times( &cpu_usage );
1083
1084         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1085                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1086     }
1087 #endif
1088
1089     if( !p_vout->b_direct )
1090     {
1091         module_Unneed( p_vout, p_vout->chroma.p_module );
1092     }
1093
1094     /* Destroy all remaining pictures */
1095     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1096     {
1097         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1098         {
1099             free( p_vout->p_picture[i_index].p_data_orig );
1100         }
1101     }
1102
1103     /* Destroy subpicture unit */
1104     spu_Attach( p_vout->p_spu, VLC_OBJECT(p_vout), VLC_FALSE );
1105     spu_Destroy( p_vout->p_spu );
1106
1107     /* Destroy translation tables */
1108     p_vout->pf_end( p_vout );
1109
1110     /* Release the change lock */
1111     vlc_mutex_unlock( &p_vout->change_lock );
1112 }
1113
1114 /*****************************************************************************
1115  * DestroyThread: thread destruction
1116  *****************************************************************************
1117  * This function is called when the thread ends. It frees all ressources
1118  * allocated by CreateThread. Status is available at this stage.
1119  *****************************************************************************/
1120 static void DestroyThread( vout_thread_t *p_vout )
1121 {
1122     /* Destroy the locks */
1123     vlc_mutex_destroy( &p_vout->picture_lock );
1124     vlc_mutex_destroy( &p_vout->change_lock );
1125
1126     /* Release the module */
1127     if( p_vout && p_vout->p_module )
1128     {
1129         module_Unneed( p_vout, p_vout->p_module );
1130     }
1131 }
1132
1133 /* following functions are local */
1134
1135 static int ReduceHeight( int i_ratio )
1136 {
1137     int i_dummy = VOUT_ASPECT_FACTOR;
1138     int i_pgcd  = 1;
1139
1140     if( !i_ratio )
1141     {
1142         return i_pgcd;
1143     }
1144
1145     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1146     while( !(i_ratio & 1) && !(i_dummy & 1) )
1147     {
1148         i_ratio >>= 1;
1149         i_dummy >>= 1;
1150         i_pgcd  <<= 1;
1151     }
1152
1153     while( !(i_ratio % 3) && !(i_dummy % 3) )
1154     {
1155         i_ratio /= 3;
1156         i_dummy /= 3;
1157         i_pgcd  *= 3;
1158     }
1159
1160     while( !(i_ratio % 5) && !(i_dummy % 5) )
1161     {
1162         i_ratio /= 5;
1163         i_dummy /= 5;
1164         i_pgcd  *= 5;
1165     }
1166
1167     return i_pgcd;
1168 }
1169
1170 static void AspectRatio( int i_aspect, int *i_aspect_x, int *i_aspect_y )
1171 {
1172     unsigned int i_pgcd = ReduceHeight( i_aspect );
1173     *i_aspect_x = i_aspect / i_pgcd;
1174     *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
1175 }
1176
1177 /*****************************************************************************
1178  * BinaryLog: computes the base 2 log of a binary value
1179  *****************************************************************************
1180  * This functions is used by MaskToShift, to get a bit index from a binary
1181  * value.
1182  *****************************************************************************/
1183 static int BinaryLog( uint32_t i )
1184 {
1185     int i_log = 0;
1186
1187     if( i == 0 ) return -31337;
1188
1189     if( i & 0xffff0000 ) i_log += 16;
1190     if( i & 0xff00ff00 ) i_log += 8;
1191     if( i & 0xf0f0f0f0 ) i_log += 4;
1192     if( i & 0xcccccccc ) i_log += 2;
1193     if( i & 0xaaaaaaaa ) i_log += 1;
1194
1195     return i_log;
1196 }
1197
1198 /*****************************************************************************
1199  * MaskToShift: transform a color mask into right and left shifts
1200  *****************************************************************************
1201  * This function is used for obtaining color shifts from masks.
1202  *****************************************************************************/
1203 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1204 {
1205     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1206
1207     if( !i_mask )
1208     {
1209         *pi_left = *pi_right = 0;
1210         return;
1211     }
1212
1213     /* Get bits */
1214     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1215     i_high = i_mask + i_low;                       /* higher bit of the mask */
1216
1217     /* Transform bits into an index */
1218     i_low =  BinaryLog (i_low);
1219     i_high = BinaryLog (i_high);
1220
1221     /* Update pointers and return */
1222     *pi_left =   i_low;
1223     *pi_right = (8 - i_high + i_low);
1224 }
1225
1226 /*****************************************************************************
1227  * InitWindowSize: find the initial dimensions the video window should have.
1228  *****************************************************************************
1229  * This function will check the "width", "height" and "zoom" config options and
1230  * will calculate the size that the video window should have.
1231  *****************************************************************************/
1232 static void InitWindowSize( vout_thread_t *p_vout, unsigned *pi_width,
1233                             unsigned *pi_height )
1234 {
1235     vlc_value_t val;
1236     int i_width, i_height;
1237     uint64_t ll_zoom;
1238
1239 #define FP_FACTOR 1000                             /* our fixed point factor */
1240
1241     var_Get( p_vout, "align", &val );
1242     p_vout->i_alignment = val.i_int;
1243
1244     var_Get( p_vout, "width", &val );
1245     i_width = val.i_int;
1246     var_Get( p_vout, "height", &val );
1247     i_height = val.i_int;
1248     var_Get( p_vout, "zoom", &val );
1249     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1250
1251     if( i_width > 0 && i_height > 0)
1252     {
1253         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1254         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1255         return;
1256     }
1257     else if( i_width > 0 )
1258     {
1259         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1260         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1261                             p_vout->fmt_in.i_aspect / FP_FACTOR );
1262         return;
1263     }
1264     else if( i_height > 0 )
1265     {
1266         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1267         *pi_width = (int)( i_height * ll_zoom * p_vout->fmt_in.i_aspect /
1268                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1269         return;
1270     }
1271
1272     if( p_vout->fmt_in.i_visible_height * p_vout->fmt_in.i_aspect
1273         >= p_vout->fmt_in.i_visible_width * VOUT_ASPECT_FACTOR )
1274     {
1275         *pi_width = (int)( p_vout->fmt_in.i_visible_height * ll_zoom
1276             * p_vout->fmt_in.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1277         *pi_height = (int)( p_vout->fmt_in.i_visible_height * ll_zoom
1278             / FP_FACTOR );
1279     }
1280     else
1281     {
1282         *pi_width = (int)( p_vout->fmt_in.i_visible_width * ll_zoom
1283             / FP_FACTOR );
1284         *pi_height = (int)( p_vout->fmt_in.i_visible_width * ll_zoom
1285             * VOUT_ASPECT_FACTOR / p_vout->fmt_in.i_aspect / FP_FACTOR );
1286     }
1287
1288 #undef FP_FACTOR
1289 }
1290
1291 /*****************************************************************************
1292  * vout_VarCallback: generic callback for intf variables
1293  *****************************************************************************/
1294 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1295                       vlc_value_t old_value, vlc_value_t new_value,
1296                       void * unused )
1297 {
1298     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1299     vlc_value_t val;
1300     val.b_bool = VLC_TRUE;
1301     var_Set( p_vout, "intf-change", val );
1302     return VLC_SUCCESS;
1303 }
1304
1305 /*****************************************************************************
1306  * Helper thread for object variables callbacks.
1307  * Only used to avoid deadlocks when using the video embedded mode.
1308  *****************************************************************************/
1309 typedef struct suxor_thread_t
1310 {
1311     VLC_COMMON_MEMBERS
1312     input_thread_t *p_input;
1313
1314 } suxor_thread_t;
1315
1316 static void SuxorRestartVideoES( suxor_thread_t *p_this )
1317 {
1318     vlc_value_t val;
1319
1320     vlc_thread_ready( p_this );
1321
1322     /* Now restart current video stream */
1323     var_Get( p_this->p_input, "video-es", &val );
1324     if( val.i_int >= 0 )
1325     {
1326         vlc_value_t val_es;
1327         val_es.i_int = -VIDEO_ES;
1328         var_Set( p_this->p_input, "video-es", val_es );
1329         var_Set( p_this->p_input, "video-es", val );
1330     }
1331
1332     vlc_object_release( p_this->p_input );
1333
1334 #ifdef WIN32
1335     CloseHandle( p_this->thread_id );
1336 #endif
1337
1338     vlc_object_destroy( p_this );
1339 }
1340
1341 /*****************************************************************************
1342  * object variables callbacks: a bunch of object variables are used by the
1343  * interfaces to interact with the vout.
1344  *****************************************************************************/
1345 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1346                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1347 {
1348     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1349     input_thread_t *p_input;
1350     vlc_value_t val;
1351
1352     char *psz_mode = newval.psz_string;
1353     char *psz_filter, *psz_deinterlace = NULL;
1354
1355     var_Get( p_vout, "vout-filter", &val );
1356     psz_filter = val.psz_string;
1357     if( psz_filter ) psz_deinterlace = strstr( psz_filter, "deinterlace" );
1358
1359     if( !psz_mode || !*psz_mode )
1360     {
1361         if( psz_deinterlace )
1362         {
1363             char *psz_src = psz_deinterlace + sizeof("deinterlace") - 1;
1364             if( psz_src[0] == ':' ) psz_src++;
1365             memmove( psz_deinterlace, psz_src, strlen(psz_src) + 1 );
1366         }
1367     }
1368     else if( !psz_deinterlace )
1369     {
1370         psz_filter = realloc( psz_filter, strlen( psz_filter ) +
1371                               sizeof(":deinterlace") );
1372         if( psz_filter && *psz_filter ) strcat( psz_filter, ":" );
1373         strcat( psz_filter, "deinterlace" );
1374     }
1375
1376     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1377                                                  FIND_PARENT );
1378     if( !p_input ) return VLC_EGENERIC;
1379
1380     if( psz_mode && *psz_mode )
1381     {
1382         /* Modify input as well because the vout might have to be restarted */
1383         val.psz_string = psz_mode;
1384         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1385         var_Set( p_input, "deinterlace-mode", val );
1386     }
1387     vlc_object_release( p_input );
1388
1389     val.b_bool = VLC_TRUE;
1390     var_Set( p_vout, "intf-change", val );
1391
1392     val.psz_string = psz_filter;
1393     var_Set( p_vout, "vout-filter", val );
1394     if( psz_filter ) free( psz_filter );
1395
1396     return VLC_SUCCESS;
1397 }
1398
1399 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1400                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1401 {
1402     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1403     input_thread_t *p_input;
1404     vlc_value_t val;
1405
1406     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1407                                                  FIND_PARENT );
1408     if (!p_input)
1409     {
1410         msg_Err( p_vout, "Input not found" );
1411         return( VLC_EGENERIC );
1412     }
1413
1414     val.b_bool = VLC_TRUE;
1415     var_Set( p_vout, "intf-change", val );
1416
1417     /* Modify input as well because the vout might have to be restarted */
1418     val.psz_string = newval.psz_string;
1419     var_Create( p_input, "vout-filter", VLC_VAR_STRING );
1420
1421     var_Set( p_input, "vout-filter", val );
1422
1423     /* Now restart current video stream */
1424     var_Get( p_input, "video-es", &val );
1425     if( val.i_int >= 0 )
1426     {
1427         suxor_thread_t *p_suxor =
1428             vlc_object_create( p_vout, sizeof(suxor_thread_t) );
1429         p_suxor->p_input = p_input;
1430         p_vout->b_filter_change = VLC_TRUE;
1431         vlc_object_yield( p_input );
1432         vlc_thread_create( p_suxor, "suxor", SuxorRestartVideoES,
1433                            VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1434     }
1435
1436     vlc_object_release( p_input );
1437
1438     return VLC_SUCCESS;
1439 }