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

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  * This module describes the programming interface for video output threads.
   4  * It includes functions allowing to open a new thread, send pictures to a
   5  * thread, and destroy a previously oppened video output thread.
   6  *****************************************************************************
   7  * Copyright (C) 2000-2004 VideoLAN
   8  * $Id$
   9  *
  10  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include <stdlib.h>                                                /* free() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #ifdef HAVE_SYS_TIMES_H
  35 #   include <sys/times.h>
  36 #endif
  37
  38 #include "vlc_video.h"
  39 #include "video_output.h"
  40 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  41
  42 #if defined( SYS_DARWIN )
  43 #include "darwin_specific.h"
  44 #endif
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int      InitThread        ( vout_thread_t * );
  50 static void     RunThread         ( vout_thread_t * );
  51 static void     ErrorThread       ( vout_thread_t * );
  52 static void     EndThread         ( vout_thread_t * );
  53 static void     DestroyThread     ( vout_thread_t * );
  54
  55 static int      ReduceHeight      ( int );
  56 static int      BinaryLog         ( uint32_t );
  57 static void     MaskToShift       ( int *, int *, uint32_t );
  58 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  59
  60 void vout_IntfInit( vout_thread_t * );
  61
  62 /* Object variables callbacks */
  63 static int DeinterlaceCallback( vlc_object_t *, char const *,
  64                                 vlc_value_t, vlc_value_t, void * );
  65 static int FilterCallback( vlc_object_t *, char const *,
  66                            vlc_value_t, vlc_value_t, void * );
  67
  68 /**
  69  * vout_AspectRatio
  70  *
  71  * Set the i_aspect_x and i_aspect_y from i_aspect.
  72  */
  73 void vout_AspectRatio( unsigned int i_aspect,
  74                        /*out*/ unsigned int *i_aspect_x,
  75                        /*out*/ unsigned int *i_aspect_y )
  76 {
  77   unsigned int i_pgcd = ReduceHeight( i_aspect );
  78   *i_aspect_x = i_aspect / i_pgcd;
  79   *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
  80 }
  81
  82 /*****************************************************************************
  83  * vout_Request: find a video output thread, create one, or destroy one.
  84  *****************************************************************************
  85  * This function looks for a video output thread matching the current
  86  * properties. If not found, it spawns a new one.
  87  *****************************************************************************/
  88 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  89                                  unsigned int i_width, unsigned int i_height,
  90                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  91 {
  92     if( !i_width || !i_height || !i_chroma )
  93     {
  94         /* Reattach video output to input before bailing out */
  95         if( p_vout )
  96         {
  97             vlc_object_t *p_playlist;
  98
  99             p_playlist = vlc_object_find( p_this,
 100                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 101
 102             if( p_playlist )
 103             {
 104                 vlc_object_detach( p_vout );
 105                 vlc_object_attach( p_vout, p_playlist );
 106
 107                 vlc_object_release( p_playlist );
 108             }
 109             else
 110             {
 111                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 112                 vlc_object_detach( p_vout );
 113                 vout_Destroy( p_vout );
 114             }
 115         }
 116         return NULL;
 117     }
 118
 119     /* If a video output was provided, lock it, otherwise look for one. */
 120     if( p_vout )
 121     {
 122         vlc_object_yield( p_vout );
 123     }
 124     else
 125     {
 126         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 127
 128         if( !p_vout )
 129         {
 130             vlc_object_t *p_playlist;
 131
 132             p_playlist = vlc_object_find( p_this,
 133                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 134             if( p_playlist )
 135             {
 136                 p_vout = vlc_object_find( p_playlist,
 137                                           VLC_OBJECT_VOUT, FIND_CHILD );
 138                 /* only first children of p_input for unused vout */
 139                 if( p_vout && p_vout->p_parent != p_playlist )
 140                 {
 141                     vlc_object_release( p_vout );
 142                     p_vout = NULL;
 143                 }
 144                 vlc_object_release( p_playlist );
 145             }
 146         }
 147     }
 148
 149     /* If we now have a video output, check it has the right properties */
 150     if( p_vout )
 151     {
 152         char *psz_filter_chain;
 153
 154         /* We don't directly check for the "filter" variable for obvious
 155          * performance reasons. */
 156         if( p_vout->b_filter_change )
 157         {
 158             psz_filter_chain = config_GetPsz( p_this, "filter" );
 159
 160             if( psz_filter_chain && !*psz_filter_chain )
 161             {
 162                 free( psz_filter_chain );
 163                 psz_filter_chain = NULL;
 164             }
 165             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 166             {
 167                 free( p_vout->psz_filter_chain );
 168                 p_vout->psz_filter_chain = NULL;
 169             }
 170
 171             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 172                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 173                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 174             {
 175                 p_vout->b_filter_change = VLC_FALSE;
 176             }
 177
 178             if( psz_filter_chain ) free( psz_filter_chain );
 179         }
 180
 181         if( ( p_vout->render.i_width != i_width ) ||
 182             ( p_vout->render.i_height != i_height ) ||
 183             ( p_vout->render.i_chroma != i_chroma ) ||
 184             ( p_vout->render.i_aspect != i_aspect
 185                     && !p_vout->b_override_aspect ) ||
 186             p_vout->b_filter_change )
 187         {
 188             /* We are not interested in this format, close this vout */
 189             vlc_object_detach( p_vout );
 190             vlc_object_release( p_vout );
 191             vout_Destroy( p_vout );
 192             p_vout = NULL;
 193         }
 194         else
 195         {
 196             /* This video output is cool! Hijack it. */
 197             vlc_object_detach( p_vout );
 198             vlc_object_attach( p_vout, p_this );
 199             vlc_object_release( p_vout );
 200         }
 201     }
 202
 203     if( !p_vout )
 204     {
 205         msg_Dbg( p_this, "no usable vout present, spawning one" );
 206
 207         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 208     }
 209
 210     return p_vout;
 211 }
 212
 213 /*****************************************************************************
 214  * vout_Create: creates a new video output thread
 215  *****************************************************************************
 216  * This function creates a new video output thread, and returns a pointer
 217  * to its description. On error, it returns NULL.
 218  *****************************************************************************/
 219 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 220                                unsigned int i_width, unsigned int i_height,
 221                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 222 {
 223     vout_thread_t  * p_vout;                            /* thread descriptor */
 224     input_thread_t * p_input_thread;
 225     int              i_index;                               /* loop variable */
 226     char           * psz_plugin;
 227     vlc_value_t      val, text;
 228
 229     /* Allocate descriptor */
 230     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 231     if( p_vout == NULL )
 232     {
 233         msg_Err( p_parent, "out of memory" );
 234         return NULL;
 235     }
 236
 237     /* Initialize pictures and subpictures - translation tables and functions
 238      * will be initialized later in InitThread */
 239     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
 240     {
 241         p_vout->p_picture[i_index].pf_lock = NULL;
 242         p_vout->p_picture[i_index].pf_unlock = NULL;
 243         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 244         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 245     }
 246
 247     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 248     {
 249         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 250         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 251     }
 252
 253     /* No images in the heap */
 254     p_vout->i_heap_size = 0;
 255
 256     /* Register the default subpicture channel */
 257     p_vout->p_default_channel = NULL;
 258     p_vout->i_channel_count = 1;
 259
 260     /* Initialize the rendering heap */
 261     I_RENDERPICTURES = 0;
 262     p_vout->render.i_width    = i_width;
 263     p_vout->render.i_height   = i_height;
 264     p_vout->render.i_chroma   = i_chroma;
 265     p_vout->render.i_aspect   = i_aspect;
 266
 267     p_vout->render.i_rmask    = 0;
 268     p_vout->render.i_gmask    = 0;
 269     p_vout->render.i_bmask    = 0;
 270
 271     p_vout->render.i_last_used_pic = -1;
 272     p_vout->render.b_allow_modify_pics = 1;
 273
 274     /* Zero the output heap */
 275     I_OUTPUTPICTURES = 0;
 276     p_vout->output.i_width    = 0;
 277     p_vout->output.i_height   = 0;
 278     p_vout->output.i_chroma   = 0;
 279     p_vout->output.i_aspect   = 0;
 280
 281     p_vout->output.i_rmask    = 0;
 282     p_vout->output.i_gmask    = 0;
 283     p_vout->output.i_bmask    = 0;
 284
 285     /* Initialize misc stuff */
 286     p_vout->i_changes    = 0;
 287     p_vout->f_gamma      = 0;
 288     p_vout->b_grayscale  = 0;
 289     p_vout->b_info       = 0;
 290     p_vout->b_interface  = 0;
 291     p_vout->b_scale      = 1;
 292     p_vout->b_fullscreen = 0;
 293     p_vout->i_alignment  = 0;
 294     p_vout->render_time  = 10;
 295     p_vout->c_fps_samples = 0;
 296     p_vout->b_filter_change = 0;
 297     p_vout->pf_control = 0;
 298     p_vout->p_parent_intf = 0;
 299
 300     /* Mouse coordinates */
 301     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 302     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 303     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 304     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 305     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 306
 307     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 308     val.b_bool = VLC_TRUE;
 309     var_Set( p_vout, "intf-change", val );
 310
 311     /* Initialize locks */
 312     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 313     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 314     vlc_mutex_init( p_vout, &p_vout->change_lock );
 315
 316     /* Attach the new object now so we can use var inheritance below */
 317     vlc_object_attach( p_vout, p_parent );
 318
 319     /* Take care of some "interface/control" related initialisations */
 320     vout_IntfInit( p_vout );
 321
 322     p_vout->b_override_aspect = VLC_FALSE;
 323
 324     /* If the parent is not a VOUT object, that means we are at the start of
 325      * the video output pipe */
 326     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 327     {
 328         var_Get( p_vout, "aspect-ratio", &val );
 329
 330         /* Check whether the user tried to override aspect ratio */
 331         if( val.psz_string )
 332         {
 333             unsigned int i_new_aspect = i_aspect;
 334             char *psz_parser = strchr( val.psz_string, ':' );
 335
 336             if( psz_parser )
 337             {
 338                 *psz_parser++ = '\0';
 339                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 340                                                       / atoi( psz_parser );
 341             }
 342             else
 343             {
 344                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 345                                        * atof( val.psz_string )
 346                                        / i_height;
 347             }
 348
 349             free( val.psz_string );
 350
 351             if( i_new_aspect && i_new_aspect != i_aspect )
 352             {
 353                 unsigned int i_aspect_x, i_aspect_y;
 354
 355                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 356
 357                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 358                          i_aspect_x, i_aspect_y );
 359
 360                 p_vout->render.i_aspect = i_new_aspect;
 361
 362                 p_vout->b_override_aspect = VLC_TRUE;
 363             }
 364         }
 365
 366         /* Look for the default filter configuration */
 367         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 368         var_Get( p_vout, "filter", &val );
 369         p_vout->psz_filter_chain = val.psz_string;
 370     }
 371     else
 372     {
 373         /* continue the parent's filter chain */
 374         char *psz_end;
 375
 376         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 377         if( psz_end && *(psz_end+1) )
 378             p_vout->psz_filter_chain = strdup( psz_end+1 );
 379         else p_vout->psz_filter_chain = NULL;
 380     }
 381
 382     /* Choose the video output module */
 383     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 384     {
 385         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 386         var_Get( p_vout, "vout", &val );
 387         psz_plugin = val.psz_string;
 388     }
 389     else
 390     {
 391         /* the filter chain is a string list of filters separated by double
 392          * colons */
 393         char *psz_end;
 394
 395         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 396         if( psz_end )
 397             psz_plugin = strndup( p_vout->psz_filter_chain,
 398                                   psz_end - p_vout->psz_filter_chain );
 399         else psz_plugin = strdup( p_vout->psz_filter_chain );
 400     }
 401
 402     /* Initialize the dimensions of the video window */
 403     InitWindowSize( p_vout, &p_vout->i_window_width,
 404                     &p_vout->i_window_height );
 405
 406     /* Create the vout thread */
 407     p_vout->p_module = module_Need( p_vout,
 408         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 409         "video filter" : "video output", psz_plugin, 0 );
 410
 411     if( psz_plugin ) free( psz_plugin );
 412     if( p_vout->p_module == NULL )
 413     {
 414         msg_Err( p_vout, "no suitable vout module" );
 415         vlc_object_destroy( p_vout );
 416         return NULL;
 417     }
 418
 419     p_vout->p_text_renderer_module =
 420         module_Need( p_vout, "text renderer", NULL, 0 );
 421     if( p_vout->p_text_renderer_module == NULL )
 422     {
 423         msg_Warn( p_vout, "no suitable text renderer module" );
 424         p_vout->pf_add_string = NULL;
 425     }
 426
 427     /* Create a few object variables for interface interaction */
 428     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 429     text.psz_string = _("Deinterlace");
 430     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 431     val.psz_string = ""; text.psz_string = _("Disable");
 432     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 433     val.psz_string = "discard"; text.psz_string = _("Discard");
 434     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 435     val.psz_string = "blend"; text.psz_string = _("Blend");
 436     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 437     val.psz_string = "mean"; text.psz_string = _("Mean");
 438     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 439     val.psz_string = "bob"; text.psz_string = _("Bob");
 440     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 441     val.psz_string = "linear"; text.psz_string = _("Linear");
 442     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 443     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 444     {
 445         var_Set( p_vout, "deinterlace", val );
 446         if( val.psz_string ) free( val.psz_string );
 447     }
 448     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 449
 450
 451     var_Create( p_vout, "filter", VLC_VAR_STRING );
 452     text.psz_string = _("Filters");
 453     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 454     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 455     if( val.psz_string )
 456     {
 457         var_Set( p_vout, "filter", val );
 458         free( val.psz_string );
 459     }
 460     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 461
 462     /* Calculate delay created by internal caching */
 463     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 464                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 465     if( p_input_thread )
 466     {
 467         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 468         vlc_object_release( p_input_thread );
 469     }
 470     else
 471     {
 472         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 473     }
 474
 475     if( vlc_thread_create( p_vout, "video output", RunThread,
 476                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 477     {
 478         msg_Err( p_vout, "out of memory" );
 479         module_Unneed( p_vout, p_vout->p_module );
 480         vlc_object_detach( p_vout );
 481         vlc_object_destroy( p_vout );
 482         return NULL;
 483     }
 484
 485     if( p_vout->b_error )
 486     {
 487         msg_Err( p_vout, "video output creation failed" );
 488
 489         /* Make sure the thread is destroyed */
 490         p_vout->b_die = VLC_TRUE;
 491         vlc_thread_join( p_vout );
 492
 493         vlc_object_detach( p_vout );
 494         vlc_object_destroy( p_vout );
 495         return NULL;
 496     }
 497
 498     return p_vout;
 499 }
 500
 501 /*****************************************************************************
 502  * vout_Destroy: destroys a previously created video output
 503  *****************************************************************************
 504  * Destroy a terminated thread.
 505  * The function will request a destruction of the specified thread. If pi_error
 506  * is NULL, it will return once the thread is destroyed. Else, it will be
 507  * update using one of the THREAD_* constants.
 508  *****************************************************************************/
 509 void vout_Destroy( vout_thread_t *p_vout )
 510 {
 511     vlc_object_t *p_playlist;
 512
 513     /* Request thread destruction */
 514     p_vout->b_die = VLC_TRUE;
 515     vlc_thread_join( p_vout );
 516
 517     var_Destroy( p_vout, "intf-change" );
 518
 519     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 520                                   FIND_ANYWHERE );
 521
 522     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 523
 524     /* Free structure */
 525     vlc_object_destroy( p_vout );
 526
 527     /* If it was the last vout, tell the interface to show up */
 528     if( p_playlist != NULL )
 529     {
 530         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 531                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 532         if( p_another_vout == NULL )
 533         {
 534             vlc_value_t val;
 535             val.b_bool = VLC_TRUE;
 536             var_Set( p_playlist, "intf-show", val );
 537         }
 538         else
 539         {
 540             vlc_object_release( p_another_vout );
 541         }
 542         vlc_object_release( p_playlist );
 543     }
 544 }
 545
 546 /*****************************************************************************
 547  * InitThread: initialize video output thread
 548  *****************************************************************************
 549  * This function is called from RunThread and performs the second step of the
 550  * initialization. It returns 0 on success. Note that the thread's flag are not
 551  * modified inside this function.
 552  *****************************************************************************/
 553 static int InitThread( vout_thread_t *p_vout )
 554 {
 555     int i;
 556     unsigned int i_aspect_x, i_aspect_y;
 557
 558     vlc_mutex_lock( &p_vout->change_lock );
 559
 560 #ifdef STATS
 561     p_vout->c_loops = 0;
 562 #endif
 563
 564     /* Initialize output method, it allocates direct buffers for us */
 565     if( p_vout->pf_init( p_vout ) )
 566     {
 567         vlc_mutex_unlock( &p_vout->change_lock );
 568         return VLC_EGENERIC;
 569     }
 570
 571     if( !I_OUTPUTPICTURES )
 572     {
 573         msg_Err( p_vout, "plugin was unable to allocate at least "
 574                          "one direct buffer" );
 575         p_vout->pf_end( p_vout );
 576         vlc_mutex_unlock( &p_vout->change_lock );
 577         return VLC_EGENERIC;
 578     }
 579
 580     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 581     {
 582         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 583                          "our internal buffers must have overflown." );
 584         p_vout->pf_end( p_vout );
 585         vlc_mutex_unlock( &p_vout->change_lock );
 586         return VLC_EGENERIC;
 587     }
 588
 589     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 590
 591 #if 0
 592     if( !p_vout->psz_filter_chain )
 593     {
 594         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 595
 596         if( psz_aspect )
 597         {
 598             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 599                                                       * atof( psz_aspect )
 600                                                       / p_vout->output.i_height;
 601             free( psz_aspect );
 602
 603             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 604             {
 605                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 606
 607                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 608                          i_aspect_x, i_aspect_y );
 609                 p_vout->output.i_aspect = i_new_aspect;
 610             }
 611         }
 612     }
 613 #endif
 614
 615     vout_AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 616     msg_Dbg( p_vout,
 617              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 618              p_vout->render.i_width, p_vout->render.i_height,
 619              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 620              i_aspect_x, i_aspect_y );
 621
 622     vout_AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 623     msg_Dbg( p_vout,
 624              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 625              p_vout->output.i_width, p_vout->output.i_height,
 626              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 627              i_aspect_x, i_aspect_y );
 628
 629     /* Calculate shifts from system-updated masks */
 630     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 631                  p_vout->output.i_rmask );
 632     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 633                  p_vout->output.i_gmask );
 634     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 635                  p_vout->output.i_bmask );
 636
 637     /* Check whether we managed to create direct buffers similar to
 638      * the render buffers, ie same size and chroma */
 639     if( ( p_vout->output.i_width == p_vout->render.i_width )
 640      && ( p_vout->output.i_height == p_vout->render.i_height )
 641      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 642     {
 643         /* Cool ! We have direct buffers, we can ask the decoder to
 644          * directly decode into them ! Map the first render buffers to
 645          * the first direct buffers, but keep the first direct buffer
 646          * for memcpy operations */
 647         p_vout->b_direct = 1;
 648
 649         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 650         {
 651             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 652                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 653                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 654             {
 655                 /* We have enough direct buffers so there's no need to
 656                  * try to use system memory buffers. */
 657                 break;
 658             }
 659             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 660             I_RENDERPICTURES++;
 661         }
 662
 663         msg_Dbg( p_vout, "direct render, mapping "
 664                  "render pictures 0-%i to system pictures 1-%i",
 665                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 666     }
 667     else
 668     {
 669         /* Rats... Something is wrong here, we could not find an output
 670          * plugin able to directly render what we decode. See if we can
 671          * find a chroma plugin to do the conversion */
 672         p_vout->b_direct = 0;
 673
 674         /* Choose the best module */
 675         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 676
 677         if( p_vout->chroma.p_module == NULL )
 678         {
 679             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 680                      (char*)&p_vout->render.i_chroma,
 681                      (char*)&p_vout->output.i_chroma );
 682             p_vout->pf_end( p_vout );
 683             vlc_mutex_unlock( &p_vout->change_lock );
 684             return VLC_EGENERIC;
 685         }
 686
 687         msg_Dbg( p_vout, "indirect render, mapping "
 688                  "render pictures 0-%i to system pictures %i-%i",
 689                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 690                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 691
 692         /* Append render buffers after the direct buffers */
 693         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 694         {
 695             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 696             I_RENDERPICTURES++;
 697
 698             /* Check if we have enough render pictures */
 699             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 700                 break;
 701         }
 702     }
 703
 704     /* Link pictures back to their heap */
 705     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 706     {
 707         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 708     }
 709
 710     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 711     {
 712         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 713     }
 714
 715 /* XXX XXX mark thread ready */
 716     return VLC_SUCCESS;
 717 }
 718
 719 /*****************************************************************************
 720  * RunThread: video output thread
 721  *****************************************************************************
 722  * Video output thread. This function does only returns when the thread is
 723  * terminated. It handles the pictures arriving in the video heap and the
 724  * display device events.
 725  *****************************************************************************/
 726 static void RunThread( vout_thread_t *p_vout)
 727 {
 728     int             i_index;                                /* index in heap */
 729     int             i_idle_loops = 0;  /* loops without displaying a picture */
 730     mtime_t         current_date;                            /* current date */
 731     mtime_t         display_date;                            /* display date */
 732
 733     picture_t *     p_picture;                            /* picture pointer */
 734     picture_t *     p_last_picture = NULL;                   /* last picture */
 735     picture_t *     p_directbuffer;              /* direct buffer to display */
 736
 737     subpicture_t *  p_subpic;                          /* subpicture pointer */
 738
 739     /*
 740      * Initialize thread
 741      */
 742     p_vout->b_error = InitThread( p_vout );
 743
 744     /* signal the creation of the vout */
 745     vlc_thread_ready( p_vout );
 746
 747     if( p_vout->b_error )
 748     {
 749         /* Destroy thread structures allocated by Create and InitThread */
 750         DestroyThread( p_vout );
 751         return;
 752     }
 753
 754     /*
 755      * Main loop - it is not executed if an error occured during
 756      * initialization
 757      */
 758     while( (!p_vout->b_die) && (!p_vout->b_error) )
 759     {
 760         /* Initialize loop variables */
 761         p_picture = NULL;
 762         display_date = 0;
 763         current_date = mdate();
 764
 765 #if 0
 766         p_vout->c_loops++;
 767         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 768         {
 769             msg_Dbg( p_vout, "picture heap: %d/%d",
 770                      I_RENDERPICTURES, p_vout->i_heap_size );
 771         }
 772 #endif
 773
 774         /*
 775          * Find the picture to display (the one with the earliest date).
 776          * This operation does not need lock, since only READY_PICTUREs
 777          * are handled. */
 778         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 779         {
 780             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 781                 && ( (p_picture == NULL) ||
 782                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 783             {
 784                 p_picture = PP_RENDERPICTURE[i_index];
 785                 display_date = p_picture->date;
 786             }
 787         }
 788
 789         if( p_picture )
 790         {
 791             /* If we met the last picture, parse again to see whether there is
 792              * a more appropriate one. */
 793             if( p_picture == p_last_picture )
 794             {
 795                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 796                 {
 797                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 798                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 799                         && ((p_picture == p_last_picture) ||
 800                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 801                     {
 802                         p_picture = PP_RENDERPICTURE[i_index];
 803                         display_date = p_picture->date;
 804                     }
 805                 }
 806             }
 807
 808             /* If we found better than the last picture, destroy it */
 809             if( p_last_picture && p_picture != p_last_picture )
 810             {
 811                 vlc_mutex_lock( &p_vout->picture_lock );
 812                 if( p_last_picture->i_refcount )
 813                 {
 814                     p_last_picture->i_status = DISPLAYED_PICTURE;
 815                 }
 816                 else
 817                 {
 818                     p_last_picture->i_status = DESTROYED_PICTURE;
 819                     p_vout->i_heap_size--;
 820                 }
 821                 vlc_mutex_unlock( &p_vout->picture_lock );
 822                 p_last_picture = NULL;
 823             }
 824
 825             /* Compute FPS rate */
 826             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 827                 = display_date;
 828
 829             if( !p_picture->b_force &&
 830                 p_picture != p_last_picture &&
 831                 display_date < current_date + p_vout->render_time )
 832             {
 833                 /* Picture is late: it will be destroyed and the thread
 834                  * will directly choose the next picture */
 835                 vlc_mutex_lock( &p_vout->picture_lock );
 836                 if( p_picture->i_refcount )
 837                 {
 838                     /* Pretend we displayed the picture, but don't destroy
 839                      * it since the decoder might still need it. */
 840                     p_picture->i_status = DISPLAYED_PICTURE;
 841                 }
 842                 else
 843                 {
 844                     /* Destroy the picture without displaying it */
 845                     p_picture->i_status = DESTROYED_PICTURE;
 846                     p_vout->i_heap_size--;
 847                 }
 848                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 849                                   current_date - display_date );
 850                 vlc_mutex_unlock( &p_vout->picture_lock );
 851
 852                 continue;
 853             }
 854
 855             if( display_date >
 856                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 857             {
 858                 /* Picture is waaay too early: it will be destroyed */
 859                 vlc_mutex_lock( &p_vout->picture_lock );
 860                 if( p_picture->i_refcount )
 861                 {
 862                     /* Pretend we displayed the picture, but don't destroy
 863                      * it since the decoder might still need it. */
 864                     p_picture->i_status = DISPLAYED_PICTURE;
 865                 }
 866                 else
 867                 {
 868                     /* Destroy the picture without displaying it */
 869                     p_picture->i_status = DESTROYED_PICTURE;
 870                     p_vout->i_heap_size--;
 871                 }
 872                 msg_Warn( p_vout, "vout warning: early picture skipped "
 873                           "("I64Fd")", display_date - current_date
 874                           - p_vout->i_pts_delay );
 875                 vlc_mutex_unlock( &p_vout->picture_lock );
 876
 877                 continue;
 878             }
 879
 880             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 881             {
 882                 /* A picture is ready to be rendered, but its rendering date
 883                  * is far from the current one so the thread will perform an
 884                  * empty loop as if no picture were found. The picture state
 885                  * is unchanged */
 886                 p_picture    = NULL;
 887                 display_date = 0;
 888             }
 889             else if( p_picture == p_last_picture )
 890             {
 891                 /* We are asked to repeat the previous picture, but we first
 892                  * wait for a couple of idle loops */
 893                 if( i_idle_loops < 4 )
 894                 {
 895                     p_picture    = NULL;
 896                     display_date = 0;
 897                 }
 898                 else
 899                 {
 900                     /* We set the display date to something high, otherwise
 901                      * we'll have lots of problems with late pictures */
 902                     display_date = current_date + p_vout->render_time;
 903                 }
 904             }
 905         }
 906
 907         if( p_picture == NULL )
 908         {
 909             i_idle_loops++;
 910         }
 911
 912         /*
 913          * Check for subpictures to display
 914          */
 915         p_subpic = vout_SortSubPictures( p_vout, display_date );
 916
 917         /*
 918          * Perform rendering
 919          */
 920         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 921
 922         /*
 923          * Call the plugin-specific rendering method if there is one
 924          */
 925         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 926         {
 927             /* Render the direct buffer returned by vout_RenderPicture */
 928             p_vout->pf_render( p_vout, p_directbuffer );
 929         }
 930
 931         /*
 932          * Sleep, wake up
 933          */
 934         if( display_date != 0 && p_directbuffer != NULL )
 935         {
 936             mtime_t current_render_time = mdate() - current_date;
 937             /* if render time is very large we don't include it in the mean */
 938             if( current_render_time < p_vout->render_time +
 939                 VOUT_DISPLAY_DELAY )
 940             {
 941                 /* Store render time using a sliding mean weighting to
 942                  * current value in a 3 to 1 ratio*/
 943                 p_vout->render_time *= 3;
 944                 p_vout->render_time += current_render_time;
 945                 p_vout->render_time >>= 2;
 946             }
 947         }
 948
 949         /* Give back change lock */
 950         vlc_mutex_unlock( &p_vout->change_lock );
 951
 952         /* Sleep a while or until a given date */
 953         if( display_date != 0 )
 954         {
 955             /* If there are filters in the chain, better give them the picture
 956              * in advance */
 957             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 958             {
 959                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 960             }
 961         }
 962         else
 963         {
 964             msleep( VOUT_IDLE_SLEEP );
 965         }
 966
 967         /* On awakening, take back lock and send immediately picture
 968          * to display. */
 969         vlc_mutex_lock( &p_vout->change_lock );
 970
 971         /*
 972          * Display the previously rendered picture
 973          */
 974         if( p_picture != NULL && p_directbuffer != NULL )
 975         {
 976             /* Display the direct buffer returned by vout_RenderPicture */
 977             if( p_vout->pf_display )
 978             {
 979                 p_vout->pf_display( p_vout, p_directbuffer );
 980             }
 981
 982             /* Reinitialize idle loop count */
 983             i_idle_loops = 0;
 984
 985             /* Tell the vout this was the last picture and that it does not
 986              * need to be forced anymore. */
 987             p_last_picture = p_picture;
 988             p_last_picture->b_force = 0;
 989         }
 990
 991         /*
 992          * Check events and manage thread
 993          */
 994         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 995         {
 996             /* A fatal error occured, and the thread must terminate
 997              * immediately, without displaying anything - setting b_error to 1
 998              * causes the immediate end of the main while() loop. */
 999             p_vout->b_error = 1;
1000         }
1001
1002         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
1003         {
1004             /* this must only happen when the vout plugin is incapable of
1005              * rescaling the picture itself. In this case we need to destroy
1006              * the current picture buffers and recreate new ones with the right
1007              * dimensions */
1008             int i;
1009
1010             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1011
1012             p_vout->pf_end( p_vout );
1013             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1014                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1015
1016             I_OUTPUTPICTURES = 0;
1017             if( p_vout->pf_init( p_vout ) )
1018             {
1019                 msg_Err( p_vout, "cannot resize display" );
1020                 /* FIXME: pf_end will be called again in EndThread() */
1021                 p_vout->b_error = 1;
1022             }
1023
1024             /* Need to reinitialise the chroma plugin */
1025             if( p_vout->chroma.p_module )
1026             {
1027                 if( p_vout->chroma.p_module->pf_deactivate )
1028                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1029                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1030             }
1031         }
1032
1033         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1034         {
1035             /* This happens when the picture buffers need to be recreated.
1036              * This is useful on multimonitor displays for instance.
1037              *
1038              * Warning: This only works when the vout creates only 1 picture
1039              * buffer!! */
1040             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1041
1042             if( !p_vout->b_direct )
1043             {
1044                 module_Unneed( p_vout, p_vout->chroma.p_module );
1045             }
1046
1047             vlc_mutex_lock( &p_vout->picture_lock );
1048
1049             p_vout->pf_end( p_vout );
1050
1051             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1052
1053             p_vout->b_error = InitThread( p_vout );
1054
1055             vlc_mutex_unlock( &p_vout->picture_lock );
1056         }
1057     }
1058
1059     /*
1060      * Error loop - wait until the thread destruction is requested
1061      */
1062     if( p_vout->b_error )
1063     {
1064         ErrorThread( p_vout );
1065     }
1066
1067     /* End of thread */
1068     EndThread( p_vout );
1069
1070     /* Destroy thread structures allocated by CreateThread */
1071     DestroyThread( p_vout );
1072 }
1073
1074 /*****************************************************************************
1075  * ErrorThread: RunThread() error loop
1076  *****************************************************************************
1077  * This function is called when an error occured during thread main's loop. The
1078  * thread can still receive feed, but must be ready to terminate as soon as
1079  * possible.
1080  *****************************************************************************/
1081 static void ErrorThread( vout_thread_t *p_vout )
1082 {
1083     /* Wait until a `die' order */
1084     while( !p_vout->b_die )
1085     {
1086         /* Sleep a while */
1087         msleep( VOUT_IDLE_SLEEP );
1088     }
1089 }
1090
1091 /*****************************************************************************
1092  * EndThread: thread destruction
1093  *****************************************************************************
1094  * This function is called when the thread ends after a sucessful
1095  * initialization. It frees all ressources allocated by InitThread.
1096  *****************************************************************************/
1097 static void EndThread( vout_thread_t *p_vout )
1098 {
1099     int     i_index;                                        /* index in heap */
1100
1101 #ifdef STATS
1102     {
1103         struct tms cpu_usage;
1104         times( &cpu_usage );
1105
1106         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1107                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1108     }
1109 #endif
1110
1111     if( !p_vout->b_direct )
1112     {
1113         module_Unneed( p_vout, p_vout->chroma.p_module );
1114     }
1115
1116     /* Destroy all remaining pictures */
1117     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1118     {
1119         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1120         {
1121             free( p_vout->p_picture[i_index].p_data_orig );
1122         }
1123     }
1124
1125     /* Destroy all remaining subpictures */
1126     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1127     {
1128         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1129         {
1130             vout_DestroySubPicture( p_vout,
1131                                     &p_vout->p_subpicture[i_index] );
1132         }
1133     }
1134
1135     if( p_vout->p_text_renderer_module )
1136         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1137
1138     /* Destroy translation tables */
1139     p_vout->pf_end( p_vout );
1140
1141     /* Release the change lock */
1142     vlc_mutex_unlock( &p_vout->change_lock );
1143 }
1144
1145 /*****************************************************************************
1146  * DestroyThread: thread destruction
1147  *****************************************************************************
1148  * This function is called when the thread ends. It frees all ressources
1149  * allocated by CreateThread. Status is available at this stage.
1150  *****************************************************************************/
1151 static void DestroyThread( vout_thread_t *p_vout )
1152 {
1153     /* Destroy the locks */
1154     vlc_mutex_destroy( &p_vout->picture_lock );
1155     vlc_mutex_destroy( &p_vout->subpicture_lock );
1156     vlc_mutex_destroy( &p_vout->change_lock );
1157
1158     /* Release the module */
1159     module_Unneed( p_vout, p_vout->p_module );
1160 }
1161
1162 /* following functions are local */
1163
1164 static int ReduceHeight( int i_ratio )
1165 {
1166     int i_dummy = VOUT_ASPECT_FACTOR;
1167     int i_pgcd  = 1;
1168
1169     if( !i_ratio )
1170     {
1171         return i_pgcd;
1172     }
1173
1174     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1175     while( !(i_ratio & 1) && !(i_dummy & 1) )
1176     {
1177         i_ratio >>= 1;
1178         i_dummy >>= 1;
1179         i_pgcd  <<= 1;
1180     }
1181
1182     while( !(i_ratio % 3) && !(i_dummy % 3) )
1183     {
1184         i_ratio /= 3;
1185         i_dummy /= 3;
1186         i_pgcd  *= 3;
1187     }
1188
1189     while( !(i_ratio % 5) && !(i_dummy % 5) )
1190     {
1191         i_ratio /= 5;
1192         i_dummy /= 5;
1193         i_pgcd  *= 5;
1194     }
1195
1196     return i_pgcd;
1197 }
1198
1199 /*****************************************************************************
1200  * BinaryLog: computes the base 2 log of a binary value
1201  *****************************************************************************
1202  * This functions is used by MaskToShift, to get a bit index from a binary
1203  * value.
1204  *****************************************************************************/
1205 static int BinaryLog( uint32_t i )
1206 {
1207     int i_log = 0;
1208
1209     if( i == 0 ) return -31337;
1210
1211     if( i & 0xffff0000 ) i_log += 16;
1212     if( i & 0xff00ff00 ) i_log += 8;
1213     if( i & 0xf0f0f0f0 ) i_log += 4;
1214     if( i & 0xcccccccc ) i_log += 2;
1215     if( i & 0xaaaaaaaa ) i_log += 1;
1216
1217     return i_log;
1218 }
1219
1220 /*****************************************************************************
1221  * MaskToShift: transform a color mask into right and left shifts
1222  *****************************************************************************
1223  * This function is used for obtaining color shifts from masks.
1224  *****************************************************************************/
1225 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1226 {
1227     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1228
1229     if( !i_mask )
1230     {
1231         *pi_left = *pi_right = 0;
1232         return;
1233     }
1234
1235     /* Get bits */
1236     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1237     i_high = i_mask + i_low;                       /* higher bit of the mask */
1238
1239     /* Transform bits into an index */
1240     i_low =  BinaryLog (i_low);
1241     i_high = BinaryLog (i_high);
1242
1243     /* Update pointers and return */
1244     *pi_left =   i_low;
1245     *pi_right = (8 - i_high + i_low);
1246 }
1247
1248 /*****************************************************************************
1249  * InitWindowSize: find the initial dimensions the video window should have.
1250  *****************************************************************************
1251  * This function will check the "width", "height" and "zoom" config options and
1252  * will calculate the size that the video window should have.
1253  *****************************************************************************/
1254 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1255                             int *pi_height )
1256 {
1257     vlc_value_t val;
1258     int i_width, i_height;
1259     uint64_t ll_zoom;
1260
1261 #define FP_FACTOR 1000                             /* our fixed point factor */
1262
1263     var_Get( p_vout, "align", &val );
1264     p_vout->i_alignment = val.i_int;
1265
1266     var_Get( p_vout, "width", &val );
1267     i_width = val.i_int;
1268     var_Get( p_vout, "height", &val );
1269     i_height = val.i_int;
1270     var_Get( p_vout, "zoom", &val );
1271     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1272
1273     if( i_width > 0 && i_height > 0)
1274     {
1275         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1276         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1277         return;
1278     }
1279     else if( i_width > 0 )
1280     {
1281         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1282         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1283                             p_vout->render.i_aspect / FP_FACTOR );
1284         return;
1285     }
1286     else if( i_height > 0 )
1287     {
1288         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1289         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1290                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1291         return;
1292     }
1293
1294     if( p_vout->render.i_height * p_vout->render.i_aspect
1295         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1296     {
1297         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1298           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1299         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1300     }
1301     else
1302     {
1303         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1304         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1305           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1306     }
1307
1308 #undef FP_FACTOR
1309 }
1310
1311 /*****************************************************************************
1312  * vout_VarCallback: generic callback for intf variables
1313  *****************************************************************************/
1314 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1315                       vlc_value_t old_value, vlc_value_t new_value,
1316                       void * unused )
1317 {
1318     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1319     vlc_value_t val;
1320     val.b_bool = VLC_TRUE;
1321     var_Set( p_vout, "intf-change", val );
1322     return VLC_SUCCESS;
1323 }
1324
1325 /*****************************************************************************
1326  * object variables callbacks: a bunch of object variables are used by the
1327  * interfaces to interact with the vout.
1328  *****************************************************************************/
1329 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1330                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1331 {
1332     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1333     input_thread_t *p_input;
1334     vlc_value_t val;
1335
1336     char *psz_mode = newval.psz_string;
1337     char *psz_filter;
1338     unsigned int  i;
1339
1340     psz_filter = config_GetPsz( p_vout, "filter" );
1341
1342     if( !psz_mode || !*psz_mode )
1343     {
1344         config_PutPsz( p_vout, "filter", "" );
1345     }
1346     else
1347     {
1348         if( !psz_filter || !*psz_filter )
1349         {
1350             config_PutPsz( p_vout, "filter", "deinterlace" );
1351         }
1352         else
1353         {
1354             if( strstr( psz_filter, "deinterlace" ) == NULL )
1355             {
1356                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1357                 strcat( psz_filter, ",deinterlace" );
1358             }
1359             config_PutPsz( p_vout, "filter", psz_filter );
1360         }
1361     }
1362
1363     if( psz_filter ) free( psz_filter );
1364
1365
1366     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1367                                                  FIND_PARENT );
1368     if( !p_input ) return VLC_EGENERIC;
1369
1370     if( psz_mode && *psz_mode )
1371     {
1372         val.psz_string = psz_mode;
1373         var_Set( p_vout, "deinterlace-mode", val );
1374         /* Modify input as well because the vout might have to be restarted */
1375         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1376         var_Set( p_input, "deinterlace-mode", val );
1377     }
1378
1379     /* now restart all video streams */
1380     vlc_mutex_lock( &p_input->stream.stream_lock );
1381
1382     p_vout->b_filter_change = VLC_TRUE;
1383
1384 #define ES p_input->stream.pp_es[i]
1385
1386     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1387     {
1388         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1389         {
1390             input_UnselectES( p_input, ES );
1391             input_SelectES( p_input, ES );
1392         }
1393 #undef ES
1394     }
1395     vlc_mutex_unlock( &p_input->stream.stream_lock );
1396
1397     vlc_object_release( p_input );
1398
1399     val.b_bool = VLC_TRUE;
1400     var_Set( p_vout, "intf-change", val );
1401     return VLC_SUCCESS;
1402 }
1403
1404 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1405                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1406 {
1407     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1408     input_thread_t *p_input;
1409     vlc_value_t val;
1410     unsigned int i;
1411
1412     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1413                                                  FIND_PARENT );
1414
1415     if (!p_input)
1416     {
1417         msg_Err( p_vout, "Input not found" );
1418         return( VLC_EGENERIC );
1419     }
1420     /* Restart the video stream */
1421     vlc_mutex_lock( &p_input->stream.stream_lock );
1422
1423     p_vout->b_filter_change = VLC_TRUE;
1424
1425 #define ES p_input->stream.pp_es[i]
1426
1427     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1428     {
1429         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1430         {
1431             input_UnselectES( p_input, ES );
1432             input_SelectES( p_input, ES );
1433         }
1434 #undef ES
1435     }
1436     vlc_mutex_unlock( &p_input->stream.stream_lock );
1437
1438     vlc_object_release( p_input );
1439
1440     val.b_bool = VLC_TRUE;
1441     var_Set( p_vout, "intf-change", val );
1442     return VLC_SUCCESS;
1443 }
1444