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 + 1; 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         p_vout->p_picture[i_index].b_slow   = 0;
 246     }
 247
 248     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 249     {
 250         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 251         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 252     }
 253
 254     /* No images in the heap */
 255     p_vout->i_heap_size = 0;
 256
 257     /* Register the default subpicture channel */
 258     p_vout->p_default_channel = NULL;
 259     p_vout->i_channel_count = 1;
 260
 261     /* Initialize the rendering heap */
 262     I_RENDERPICTURES = 0;
 263     p_vout->render.i_width    = i_width;
 264     p_vout->render.i_height   = i_height;
 265     p_vout->render.i_chroma   = i_chroma;
 266     p_vout->render.i_aspect   = i_aspect;
 267
 268     p_vout->render.i_rmask    = 0;
 269     p_vout->render.i_gmask    = 0;
 270     p_vout->render.i_bmask    = 0;
 271
 272     p_vout->render.i_last_used_pic = -1;
 273     p_vout->render.b_allow_modify_pics = 1;
 274
 275     /* Zero the output heap */
 276     I_OUTPUTPICTURES = 0;
 277     p_vout->output.i_width    = 0;
 278     p_vout->output.i_height   = 0;
 279     p_vout->output.i_chroma   = 0;
 280     p_vout->output.i_aspect   = 0;
 281
 282     p_vout->output.i_rmask    = 0;
 283     p_vout->output.i_gmask    = 0;
 284     p_vout->output.i_bmask    = 0;
 285
 286     /* Initialize misc stuff */
 287     p_vout->i_changes    = 0;
 288     p_vout->f_gamma      = 0;
 289     p_vout->b_grayscale  = 0;
 290     p_vout->b_info       = 0;
 291     p_vout->b_interface  = 0;
 292     p_vout->b_scale      = 1;
 293     p_vout->b_fullscreen = 0;
 294     p_vout->i_alignment  = 0;
 295     p_vout->render_time  = 10;
 296     p_vout->c_fps_samples = 0;
 297     p_vout->b_filter_change = 0;
 298     p_vout->pf_control = 0;
 299     p_vout->p_parent_intf = 0;
 300
 301     /* Mouse coordinates */
 302     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 303     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 304     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 305     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 306     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 307
 308     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 309     val.b_bool = VLC_TRUE;
 310     var_Set( p_vout, "intf-change", val );
 311
 312     /* Initialize locks */
 313     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 314     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 315     vlc_mutex_init( p_vout, &p_vout->change_lock );
 316
 317     /* Attach the new object now so we can use var inheritance below */
 318     vlc_object_attach( p_vout, p_parent );
 319
 320     /* Take care of some "interface/control" related initialisations */
 321     vout_IntfInit( p_vout );
 322
 323     p_vout->b_override_aspect = VLC_FALSE;
 324
 325     /* If the parent is not a VOUT object, that means we are at the start of
 326      * the video output pipe */
 327     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 328     {
 329         var_Get( p_vout, "aspect-ratio", &val );
 330
 331         /* Check whether the user tried to override aspect ratio */
 332         if( val.psz_string )
 333         {
 334             unsigned int i_new_aspect = i_aspect;
 335             char *psz_parser = strchr( val.psz_string, ':' );
 336
 337             if( psz_parser )
 338             {
 339                 *psz_parser++ = '\0';
 340                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 341                                                       / atoi( psz_parser );
 342             }
 343             else
 344             {
 345                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 346                                        * atof( val.psz_string )
 347                                        / i_height;
 348             }
 349
 350             free( val.psz_string );
 351
 352             if( i_new_aspect && i_new_aspect != i_aspect )
 353             {
 354                 unsigned int i_aspect_x, i_aspect_y;
 355
 356                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 357
 358                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 359                          i_aspect_x, i_aspect_y );
 360
 361                 p_vout->render.i_aspect = i_new_aspect;
 362
 363                 p_vout->b_override_aspect = VLC_TRUE;
 364             }
 365         }
 366
 367         /* Look for the default filter configuration */
 368         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 369         var_Get( p_vout, "filter", &val );
 370         p_vout->psz_filter_chain = val.psz_string;
 371     }
 372     else
 373     {
 374         /* continue the parent's filter chain */
 375         char *psz_end;
 376
 377         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 378         if( psz_end && *(psz_end+1) )
 379             p_vout->psz_filter_chain = strdup( psz_end+1 );
 380         else p_vout->psz_filter_chain = NULL;
 381     }
 382
 383     /* Choose the video output module */
 384     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 385     {
 386         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 387         var_Get( p_vout, "vout", &val );
 388         psz_plugin = val.psz_string;
 389     }
 390     else
 391     {
 392         /* the filter chain is a string list of filters separated by double
 393          * colons */
 394         char *psz_end;
 395
 396         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 397         if( psz_end )
 398             psz_plugin = strndup( p_vout->psz_filter_chain,
 399                                   psz_end - p_vout->psz_filter_chain );
 400         else psz_plugin = strdup( p_vout->psz_filter_chain );
 401     }
 402
 403     /* Initialize the dimensions of the video window */
 404     InitWindowSize( p_vout, &p_vout->i_window_width,
 405                     &p_vout->i_window_height );
 406
 407     /* Create the vout thread */
 408     p_vout->p_module = module_Need( p_vout,
 409         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 410         "video filter" : "video output", psz_plugin, 0 );
 411
 412     if( psz_plugin ) free( psz_plugin );
 413     if( p_vout->p_module == NULL )
 414     {
 415         msg_Err( p_vout, "no suitable vout module" );
 416         vlc_object_detach( p_vout );
 417         vlc_object_destroy( p_vout );
 418         return NULL;
 419     }
 420
 421     p_vout->p_text_renderer_module =
 422         module_Need( p_vout, "text renderer", NULL, 0 );
 423     if( p_vout->p_text_renderer_module == NULL )
 424     {
 425         msg_Warn( p_vout, "no suitable text renderer module" );
 426         p_vout->pf_add_string = NULL;
 427     }
 428
 429     /* Create a few object variables for interface interaction */
 430     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 431     text.psz_string = _("Deinterlace");
 432     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 433     val.psz_string = ""; text.psz_string = _("Disable");
 434     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 435     val.psz_string = "discard"; text.psz_string = _("Discard");
 436     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 437     val.psz_string = "blend"; text.psz_string = _("Blend");
 438     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 439     val.psz_string = "mean"; text.psz_string = _("Mean");
 440     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 441     val.psz_string = "bob"; text.psz_string = _("Bob");
 442     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 443     val.psz_string = "linear"; text.psz_string = _("Linear");
 444     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 445     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 446     {
 447         var_Set( p_vout, "deinterlace", val );
 448         if( val.psz_string ) free( val.psz_string );
 449     }
 450     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 451
 452
 453     var_Create( p_vout, "filter", VLC_VAR_STRING );
 454     text.psz_string = _("Filters");
 455     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 456     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 457     if( val.psz_string )
 458     {
 459         var_Set( p_vout, "filter", val );
 460         free( val.psz_string );
 461     }
 462     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 463
 464     /* Calculate delay created by internal caching */
 465     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 466                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 467     if( p_input_thread )
 468     {
 469         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 470         vlc_object_release( p_input_thread );
 471     }
 472     else
 473     {
 474         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 475     }
 476
 477     if( vlc_thread_create( p_vout, "video output", RunThread,
 478                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 479     {
 480         msg_Err( p_vout, "out of memory" );
 481         module_Unneed( p_vout, p_vout->p_module );
 482         vlc_object_detach( p_vout );
 483         vlc_object_destroy( p_vout );
 484         return NULL;
 485     }
 486
 487     if( p_vout->b_error )
 488     {
 489         msg_Err( p_vout, "video output creation failed" );
 490
 491         /* Make sure the thread is destroyed */
 492         p_vout->b_die = VLC_TRUE;
 493
 494         if( p_vout->p_text_renderer_module )
 495         {
 496             module_Unneed( p_vout, p_vout->p_text_renderer_module );
 497         }
 498         vlc_thread_join( p_vout );
 499
 500         vlc_object_detach( p_vout );
 501         vlc_object_destroy( p_vout );
 502         return NULL;
 503     }
 504
 505     return p_vout;
 506 }
 507
 508 /*****************************************************************************
 509  * vout_Destroy: destroys a previously created video output
 510  *****************************************************************************
 511  * Destroy a terminated thread.
 512  * The function will request a destruction of the specified thread. If pi_error
 513  * is NULL, it will return once the thread is destroyed. Else, it will be
 514  * update using one of the THREAD_* constants.
 515  *****************************************************************************/
 516 void vout_Destroy( vout_thread_t *p_vout )
 517 {
 518     vlc_object_t *p_playlist;
 519
 520     /* Request thread destruction */
 521     p_vout->b_die = VLC_TRUE;
 522     vlc_thread_join( p_vout );
 523
 524     var_Destroy( p_vout, "intf-change" );
 525
 526     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 527                                   FIND_ANYWHERE );
 528
 529     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 530
 531     /* Free structure */
 532     vlc_object_destroy( p_vout );
 533
 534     /* If it was the last vout, tell the interface to show up */
 535     if( p_playlist != NULL )
 536     {
 537         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 538                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 539         if( p_another_vout == NULL )
 540         {
 541             vlc_value_t val;
 542             val.b_bool = VLC_TRUE;
 543             var_Set( p_playlist, "intf-show", val );
 544         }
 545         else
 546         {
 547             vlc_object_release( p_another_vout );
 548         }
 549         vlc_object_release( p_playlist );
 550     }
 551 }
 552
 553 /*****************************************************************************
 554  * InitThread: initialize video output thread
 555  *****************************************************************************
 556  * This function is called from RunThread and performs the second step of the
 557  * initialization. It returns 0 on success. Note that the thread's flag are not
 558  * modified inside this function.
 559  *****************************************************************************/
 560 static int InitThread( vout_thread_t *p_vout )
 561 {
 562     int i;
 563     unsigned int i_aspect_x, i_aspect_y;
 564
 565     vlc_mutex_lock( &p_vout->change_lock );
 566
 567 #ifdef STATS
 568     p_vout->c_loops = 0;
 569 #endif
 570
 571     /* Initialize output method, it allocates direct buffers for us */
 572     if( p_vout->pf_init( p_vout ) )
 573     {
 574         vlc_mutex_unlock( &p_vout->change_lock );
 575         return VLC_EGENERIC;
 576     }
 577
 578     if( !I_OUTPUTPICTURES )
 579     {
 580         msg_Err( p_vout, "plugin was unable to allocate at least "
 581                          "one direct buffer" );
 582         p_vout->pf_end( p_vout );
 583         vlc_mutex_unlock( &p_vout->change_lock );
 584         return VLC_EGENERIC;
 585     }
 586
 587     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 588     {
 589         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 590                          "our internal buffers must have overflown." );
 591         p_vout->pf_end( p_vout );
 592         vlc_mutex_unlock( &p_vout->change_lock );
 593         return VLC_EGENERIC;
 594     }
 595
 596     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 597
 598 #if 0
 599     if( !p_vout->psz_filter_chain )
 600     {
 601         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 602
 603         if( psz_aspect )
 604         {
 605             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 606                                                       * atof( psz_aspect )
 607                                                       / p_vout->output.i_height;
 608             free( psz_aspect );
 609
 610             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 611             {
 612                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 613
 614                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 615                          i_aspect_x, i_aspect_y );
 616                 p_vout->output.i_aspect = i_new_aspect;
 617             }
 618         }
 619     }
 620 #endif
 621
 622     vout_AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 623     msg_Dbg( p_vout,
 624              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 625              p_vout->render.i_width, p_vout->render.i_height,
 626              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 627              i_aspect_x, i_aspect_y );
 628
 629     vout_AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 630     msg_Dbg( p_vout,
 631              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 632              p_vout->output.i_width, p_vout->output.i_height,
 633              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 634              i_aspect_x, i_aspect_y );
 635
 636     /* Calculate shifts from system-updated masks */
 637     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 638                  p_vout->output.i_rmask );
 639     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 640                  p_vout->output.i_gmask );
 641     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 642                  p_vout->output.i_bmask );
 643
 644     /* Check whether we managed to create direct buffers similar to
 645      * the render buffers, ie same size and chroma */
 646     if( ( p_vout->output.i_width == p_vout->render.i_width )
 647      && ( p_vout->output.i_height == p_vout->render.i_height )
 648      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 649     {
 650         /* Cool ! We have direct buffers, we can ask the decoder to
 651          * directly decode into them ! Map the first render buffers to
 652          * the first direct buffers, but keep the first direct buffer
 653          * for memcpy operations */
 654         p_vout->b_direct = 1;
 655
 656         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 657         {
 658             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 659                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 660                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 661             {
 662                 /* We have enough direct buffers so there's no need to
 663                  * try to use system memory buffers. */
 664                 break;
 665             }
 666             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 667             I_RENDERPICTURES++;
 668         }
 669
 670         msg_Dbg( p_vout, "direct render, mapping "
 671                  "render pictures 0-%i to system pictures 1-%i",
 672                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 673     }
 674     else
 675     {
 676         /* Rats... Something is wrong here, we could not find an output
 677          * plugin able to directly render what we decode. See if we can
 678          * find a chroma plugin to do the conversion */
 679         p_vout->b_direct = 0;
 680
 681         /* Choose the best module */
 682         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 683
 684         if( p_vout->chroma.p_module == NULL )
 685         {
 686             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 687                      (char*)&p_vout->render.i_chroma,
 688                      (char*)&p_vout->output.i_chroma );
 689             p_vout->pf_end( p_vout );
 690             vlc_mutex_unlock( &p_vout->change_lock );
 691             return VLC_EGENERIC;
 692         }
 693
 694         msg_Dbg( p_vout, "indirect render, mapping "
 695                  "render pictures 0-%i to system pictures %i-%i",
 696                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 697                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 698
 699         /* Append render buffers after the direct buffers */
 700         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 701         {
 702             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 703             I_RENDERPICTURES++;
 704
 705             /* Check if we have enough render pictures */
 706             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 707                 break;
 708         }
 709     }
 710
 711     /* Link pictures back to their heap */
 712     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 713     {
 714         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 715     }
 716
 717     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 718     {
 719         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 720     }
 721
 722 /* XXX XXX mark thread ready */
 723     return VLC_SUCCESS;
 724 }
 725
 726 /*****************************************************************************
 727  * RunThread: video output thread
 728  *****************************************************************************
 729  * Video output thread. This function does only returns when the thread is
 730  * terminated. It handles the pictures arriving in the video heap and the
 731  * display device events.
 732  *****************************************************************************/
 733 static void RunThread( vout_thread_t *p_vout)
 734 {
 735     int             i_index;                                /* index in heap */
 736     int             i_idle_loops = 0;  /* loops without displaying a picture */
 737     mtime_t         current_date;                            /* current date */
 738     mtime_t         display_date;                            /* display date */
 739
 740     picture_t *     p_picture;                            /* picture pointer */
 741     picture_t *     p_last_picture = NULL;                   /* last picture */
 742     picture_t *     p_directbuffer;              /* direct buffer to display */
 743
 744     subpicture_t *  p_subpic;                          /* subpicture pointer */
 745
 746     /*
 747      * Initialize thread
 748      */
 749     p_vout->b_error = InitThread( p_vout );
 750
 751     /* signal the creation of the vout */
 752     vlc_thread_ready( p_vout );
 753
 754     if( p_vout->b_error )
 755     {
 756         /* Destroy thread structures allocated by Create and InitThread */
 757         DestroyThread( p_vout );
 758         return;
 759     }
 760
 761     /*
 762      * Main loop - it is not executed if an error occured during
 763      * initialization
 764      */
 765     while( (!p_vout->b_die) && (!p_vout->b_error) )
 766     {
 767         /* Initialize loop variables */
 768         p_picture = NULL;
 769         display_date = 0;
 770         current_date = mdate();
 771
 772 #if 0
 773         p_vout->c_loops++;
 774         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 775         {
 776             msg_Dbg( p_vout, "picture heap: %d/%d",
 777                      I_RENDERPICTURES, p_vout->i_heap_size );
 778         }
 779 #endif
 780
 781         /*
 782          * Find the picture to display (the one with the earliest date).
 783          * This operation does not need lock, since only READY_PICTUREs
 784          * are handled. */
 785         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 786         {
 787             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 788                 && ( (p_picture == NULL) ||
 789                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 790             {
 791                 p_picture = PP_RENDERPICTURE[i_index];
 792                 display_date = p_picture->date;
 793             }
 794         }
 795
 796         if( p_picture )
 797         {
 798             /* If we met the last picture, parse again to see whether there is
 799              * a more appropriate one. */
 800             if( p_picture == p_last_picture )
 801             {
 802                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 803                 {
 804                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 805                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 806                         && ((p_picture == p_last_picture) ||
 807                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 808                     {
 809                         p_picture = PP_RENDERPICTURE[i_index];
 810                         display_date = p_picture->date;
 811                     }
 812                 }
 813             }
 814
 815             /* If we found better than the last picture, destroy it */
 816             if( p_last_picture && p_picture != p_last_picture )
 817             {
 818                 vlc_mutex_lock( &p_vout->picture_lock );
 819                 if( p_last_picture->i_refcount )
 820                 {
 821                     p_last_picture->i_status = DISPLAYED_PICTURE;
 822                 }
 823                 else
 824                 {
 825                     p_last_picture->i_status = DESTROYED_PICTURE;
 826                     p_vout->i_heap_size--;
 827                 }
 828                 vlc_mutex_unlock( &p_vout->picture_lock );
 829                 p_last_picture = NULL;
 830             }
 831
 832             /* Compute FPS rate */
 833             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 834                 = display_date;
 835
 836             if( !p_picture->b_force &&
 837                 p_picture != p_last_picture &&
 838                 display_date < current_date + p_vout->render_time )
 839             {
 840                 /* Picture is late: it will be destroyed and the thread
 841                  * will directly choose the next picture */
 842                 vlc_mutex_lock( &p_vout->picture_lock );
 843                 if( p_picture->i_refcount )
 844                 {
 845                     /* Pretend we displayed the picture, but don't destroy
 846                      * it since the decoder might still need it. */
 847                     p_picture->i_status = DISPLAYED_PICTURE;
 848                 }
 849                 else
 850                 {
 851                     /* Destroy the picture without displaying it */
 852                     p_picture->i_status = DESTROYED_PICTURE;
 853                     p_vout->i_heap_size--;
 854                 }
 855                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 856                                   current_date - display_date );
 857                 vlc_mutex_unlock( &p_vout->picture_lock );
 858
 859                 continue;
 860             }
 861
 862             if( display_date >
 863                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 864             {
 865                 /* Picture is waaay too early: it will be destroyed */
 866                 vlc_mutex_lock( &p_vout->picture_lock );
 867                 if( p_picture->i_refcount )
 868                 {
 869                     /* Pretend we displayed the picture, but don't destroy
 870                      * it since the decoder might still need it. */
 871                     p_picture->i_status = DISPLAYED_PICTURE;
 872                 }
 873                 else
 874                 {
 875                     /* Destroy the picture without displaying it */
 876                     p_picture->i_status = DESTROYED_PICTURE;
 877                     p_vout->i_heap_size--;
 878                 }
 879                 msg_Warn( p_vout, "vout warning: early picture skipped "
 880                           "("I64Fd")", display_date - current_date
 881                           - p_vout->i_pts_delay );
 882                 vlc_mutex_unlock( &p_vout->picture_lock );
 883
 884                 continue;
 885             }
 886
 887             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 888             {
 889                 /* A picture is ready to be rendered, but its rendering date
 890                  * is far from the current one so the thread will perform an
 891                  * empty loop as if no picture were found. The picture state
 892                  * is unchanged */
 893                 p_picture    = NULL;
 894                 display_date = 0;
 895             }
 896             else if( p_picture == p_last_picture )
 897             {
 898                 /* We are asked to repeat the previous picture, but we first
 899                  * wait for a couple of idle loops */
 900                 if( i_idle_loops < 4 )
 901                 {
 902                     p_picture    = NULL;
 903                     display_date = 0;
 904                 }
 905                 else
 906                 {
 907                     /* We set the display date to something high, otherwise
 908                      * we'll have lots of problems with late pictures */
 909                     display_date = current_date + p_vout->render_time;
 910                 }
 911             }
 912         }
 913
 914         if( p_picture == NULL )
 915         {
 916             i_idle_loops++;
 917         }
 918
 919         /*
 920          * Check for subpictures to display
 921          */
 922         p_subpic = vout_SortSubPictures( p_vout, display_date );
 923
 924         /*
 925          * Perform rendering
 926          */
 927         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 928
 929         /*
 930          * Call the plugin-specific rendering method if there is one
 931          */
 932         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 933         {
 934             /* Render the direct buffer returned by vout_RenderPicture */
 935             p_vout->pf_render( p_vout, p_directbuffer );
 936         }
 937
 938         /*
 939          * Sleep, wake up
 940          */
 941         if( display_date != 0 && p_directbuffer != NULL )
 942         {
 943             mtime_t current_render_time = mdate() - current_date;
 944             /* if render time is very large we don't include it in the mean */
 945             if( current_render_time < p_vout->render_time +
 946                 VOUT_DISPLAY_DELAY )
 947             {
 948                 /* Store render time using a sliding mean weighting to
 949                  * current value in a 3 to 1 ratio*/
 950                 p_vout->render_time *= 3;
 951                 p_vout->render_time += current_render_time;
 952                 p_vout->render_time >>= 2;
 953             }
 954         }
 955
 956         /* Give back change lock */
 957         vlc_mutex_unlock( &p_vout->change_lock );
 958
 959         /* Sleep a while or until a given date */
 960         if( display_date != 0 )
 961         {
 962             /* If there are filters in the chain, better give them the picture
 963              * in advance */
 964             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 965             {
 966                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 967             }
 968         }
 969         else
 970         {
 971             msleep( VOUT_IDLE_SLEEP );
 972         }
 973
 974         /* On awakening, take back lock and send immediately picture
 975          * to display. */
 976         vlc_mutex_lock( &p_vout->change_lock );
 977
 978         /*
 979          * Display the previously rendered picture
 980          */
 981         if( p_picture != NULL && p_directbuffer != NULL )
 982         {
 983             /* Display the direct buffer returned by vout_RenderPicture */
 984             if( p_vout->pf_display )
 985             {
 986                 p_vout->pf_display( p_vout, p_directbuffer );
 987             }
 988
 989             /* Reinitialize idle loop count */
 990             i_idle_loops = 0;
 991
 992             /* Tell the vout this was the last picture and that it does not
 993              * need to be forced anymore. */
 994             p_last_picture = p_picture;
 995             p_last_picture->b_force = 0;
 996         }
 997
 998         /*
 999          * Check events and manage thread
1000          */
1001         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
1002         {
1003             /* A fatal error occured, and the thread must terminate
1004              * immediately, without displaying anything - setting b_error to 1
1005              * causes the immediate end of the main while() loop. */
1006             p_vout->b_error = 1;
1007         }
1008
1009         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
1010         {
1011             /* this must only happen when the vout plugin is incapable of
1012              * rescaling the picture itself. In this case we need to destroy
1013              * the current picture buffers and recreate new ones with the right
1014              * dimensions */
1015             int i;
1016
1017             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1018
1019             p_vout->pf_end( p_vout );
1020             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1021                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1022
1023             I_OUTPUTPICTURES = 0;
1024             if( p_vout->pf_init( p_vout ) )
1025             {
1026                 msg_Err( p_vout, "cannot resize display" );
1027                 /* FIXME: pf_end will be called again in EndThread() */
1028                 p_vout->b_error = 1;
1029             }
1030
1031             /* Need to reinitialise the chroma plugin */
1032             if( p_vout->chroma.p_module )
1033             {
1034                 if( p_vout->chroma.p_module->pf_deactivate )
1035                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1036                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1037             }
1038         }
1039
1040         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1041         {
1042             /* This happens when the picture buffers need to be recreated.
1043              * This is useful on multimonitor displays for instance.
1044              *
1045              * Warning: This only works when the vout creates only 1 picture
1046              * buffer!! */
1047             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1048
1049             if( !p_vout->b_direct )
1050             {
1051                 module_Unneed( p_vout, p_vout->chroma.p_module );
1052             }
1053
1054             vlc_mutex_lock( &p_vout->picture_lock );
1055
1056             p_vout->pf_end( p_vout );
1057
1058             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1059
1060             p_vout->b_error = InitThread( p_vout );
1061
1062             vlc_mutex_unlock( &p_vout->picture_lock );
1063         }
1064     }
1065
1066     /*
1067      * Error loop - wait until the thread destruction is requested
1068      */
1069     if( p_vout->b_error )
1070     {
1071         ErrorThread( p_vout );
1072     }
1073
1074     /* End of thread */
1075     EndThread( p_vout );
1076
1077     /* Destroy thread structures allocated by CreateThread */
1078     DestroyThread( p_vout );
1079 }
1080
1081 /*****************************************************************************
1082  * ErrorThread: RunThread() error loop
1083  *****************************************************************************
1084  * This function is called when an error occured during thread main's loop. The
1085  * thread can still receive feed, but must be ready to terminate as soon as
1086  * possible.
1087  *****************************************************************************/
1088 static void ErrorThread( vout_thread_t *p_vout )
1089 {
1090     /* Wait until a `die' order */
1091     while( !p_vout->b_die )
1092     {
1093         /* Sleep a while */
1094         msleep( VOUT_IDLE_SLEEP );
1095     }
1096 }
1097
1098 /*****************************************************************************
1099  * EndThread: thread destruction
1100  *****************************************************************************
1101  * This function is called when the thread ends after a sucessful
1102  * initialization. It frees all ressources allocated by InitThread.
1103  *****************************************************************************/
1104 static void EndThread( vout_thread_t *p_vout )
1105 {
1106     int     i_index;                                        /* index in heap */
1107
1108 #ifdef STATS
1109     {
1110         struct tms cpu_usage;
1111         times( &cpu_usage );
1112
1113         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1114                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1115     }
1116 #endif
1117
1118     if( !p_vout->b_direct )
1119     {
1120         module_Unneed( p_vout, p_vout->chroma.p_module );
1121     }
1122
1123     /* Destroy all remaining pictures */
1124     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES + 1; i_index++ )
1125     {
1126         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1127         {
1128             free( p_vout->p_picture[i_index].p_data_orig );
1129         }
1130     }
1131
1132     /* Destroy all remaining subpictures */
1133     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1134     {
1135         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1136         {
1137             vout_DestroySubPicture( p_vout,
1138                                     &p_vout->p_subpicture[i_index] );
1139         }
1140     }
1141
1142     if( p_vout->p_text_renderer_module )
1143         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1144
1145     /* Destroy translation tables */
1146     p_vout->pf_end( p_vout );
1147
1148     /* Release the change lock */
1149     vlc_mutex_unlock( &p_vout->change_lock );
1150 }
1151
1152 /*****************************************************************************
1153  * DestroyThread: thread destruction
1154  *****************************************************************************
1155  * This function is called when the thread ends. It frees all ressources
1156  * allocated by CreateThread. Status is available at this stage.
1157  *****************************************************************************/
1158 static void DestroyThread( vout_thread_t *p_vout )
1159 {
1160     /* Destroy the locks */
1161     vlc_mutex_destroy( &p_vout->picture_lock );
1162     vlc_mutex_destroy( &p_vout->subpicture_lock );
1163     vlc_mutex_destroy( &p_vout->change_lock );
1164
1165     /* Release the module */
1166     if( p_vout->p_module && p_vout->p_module )
1167     {
1168         module_Unneed( p_vout, p_vout->p_module );
1169     }
1170 }
1171
1172 /* following functions are local */
1173
1174 static int ReduceHeight( int i_ratio )
1175 {
1176     int i_dummy = VOUT_ASPECT_FACTOR;
1177     int i_pgcd  = 1;
1178
1179     if( !i_ratio )
1180     {
1181         return i_pgcd;
1182     }
1183
1184     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1185     while( !(i_ratio & 1) && !(i_dummy & 1) )
1186     {
1187         i_ratio >>= 1;
1188         i_dummy >>= 1;
1189         i_pgcd  <<= 1;
1190     }
1191
1192     while( !(i_ratio % 3) && !(i_dummy % 3) )
1193     {
1194         i_ratio /= 3;
1195         i_dummy /= 3;
1196         i_pgcd  *= 3;
1197     }
1198
1199     while( !(i_ratio % 5) && !(i_dummy % 5) )
1200     {
1201         i_ratio /= 5;
1202         i_dummy /= 5;
1203         i_pgcd  *= 5;
1204     }
1205
1206     return i_pgcd;
1207 }
1208
1209 /*****************************************************************************
1210  * BinaryLog: computes the base 2 log of a binary value
1211  *****************************************************************************
1212  * This functions is used by MaskToShift, to get a bit index from a binary
1213  * value.
1214  *****************************************************************************/
1215 static int BinaryLog( uint32_t i )
1216 {
1217     int i_log = 0;
1218
1219     if( i == 0 ) return -31337;
1220
1221     if( i & 0xffff0000 ) i_log += 16;
1222     if( i & 0xff00ff00 ) i_log += 8;
1223     if( i & 0xf0f0f0f0 ) i_log += 4;
1224     if( i & 0xcccccccc ) i_log += 2;
1225     if( i & 0xaaaaaaaa ) i_log += 1;
1226
1227     return i_log;
1228 }
1229
1230 /*****************************************************************************
1231  * MaskToShift: transform a color mask into right and left shifts
1232  *****************************************************************************
1233  * This function is used for obtaining color shifts from masks.
1234  *****************************************************************************/
1235 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1236 {
1237     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1238
1239     if( !i_mask )
1240     {
1241         *pi_left = *pi_right = 0;
1242         return;
1243     }
1244
1245     /* Get bits */
1246     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1247     i_high = i_mask + i_low;                       /* higher bit of the mask */
1248
1249     /* Transform bits into an index */
1250     i_low =  BinaryLog (i_low);
1251     i_high = BinaryLog (i_high);
1252
1253     /* Update pointers and return */
1254     *pi_left =   i_low;
1255     *pi_right = (8 - i_high + i_low);
1256 }
1257
1258 /*****************************************************************************
1259  * InitWindowSize: find the initial dimensions the video window should have.
1260  *****************************************************************************
1261  * This function will check the "width", "height" and "zoom" config options and
1262  * will calculate the size that the video window should have.
1263  *****************************************************************************/
1264 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1265                             int *pi_height )
1266 {
1267     vlc_value_t val;
1268     int i_width, i_height;
1269     uint64_t ll_zoom;
1270
1271 #define FP_FACTOR 1000                             /* our fixed point factor */
1272
1273     var_Get( p_vout, "align", &val );
1274     p_vout->i_alignment = val.i_int;
1275
1276     var_Get( p_vout, "width", &val );
1277     i_width = val.i_int;
1278     var_Get( p_vout, "height", &val );
1279     i_height = val.i_int;
1280     var_Get( p_vout, "zoom", &val );
1281     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1282
1283     if( i_width > 0 && i_height > 0)
1284     {
1285         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1286         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1287         return;
1288     }
1289     else if( i_width > 0 )
1290     {
1291         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1292         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1293                             p_vout->render.i_aspect / FP_FACTOR );
1294         return;
1295     }
1296     else if( i_height > 0 )
1297     {
1298         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1299         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1300                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1301         return;
1302     }
1303
1304     if( p_vout->render.i_height * p_vout->render.i_aspect
1305         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1306     {
1307         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1308           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1309         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1310     }
1311     else
1312     {
1313         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1314         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1315           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1316     }
1317
1318 #undef FP_FACTOR
1319 }
1320
1321 /*****************************************************************************
1322  * vout_VarCallback: generic callback for intf variables
1323  *****************************************************************************/
1324 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1325                       vlc_value_t old_value, vlc_value_t new_value,
1326                       void * unused )
1327 {
1328     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1329     vlc_value_t val;
1330     val.b_bool = VLC_TRUE;
1331     var_Set( p_vout, "intf-change", val );
1332     return VLC_SUCCESS;
1333 }
1334
1335 /*****************************************************************************
1336  * object variables callbacks: a bunch of object variables are used by the
1337  * interfaces to interact with the vout.
1338  *****************************************************************************/
1339 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1340                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1341 {
1342     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1343     input_thread_t *p_input;
1344     vlc_value_t val;
1345
1346     char *psz_mode = newval.psz_string;
1347     char *psz_filter;
1348     unsigned int  i;
1349
1350     psz_filter = config_GetPsz( p_vout, "filter" );
1351
1352     if( !psz_mode || !*psz_mode )
1353     {
1354         config_PutPsz( p_vout, "filter", "" );
1355     }
1356     else
1357     {
1358         if( !psz_filter || !*psz_filter )
1359         {
1360             config_PutPsz( p_vout, "filter", "deinterlace" );
1361         }
1362         else
1363         {
1364             if( strstr( psz_filter, "deinterlace" ) == NULL )
1365             {
1366                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1367                 strcat( psz_filter, ",deinterlace" );
1368             }
1369             config_PutPsz( p_vout, "filter", psz_filter );
1370         }
1371     }
1372
1373     if( psz_filter ) free( psz_filter );
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         val.psz_string = psz_mode;
1383         var_Set( p_vout, "deinterlace-mode", val );
1384         /* Modify input as well because the vout might have to be restarted */
1385         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1386         var_Set( p_input, "deinterlace-mode", val );
1387     }
1388
1389     /* FIXME FIXME input2 --fenrir */
1390 #if 0
1391     /* now restart all video streams */
1392     vlc_mutex_lock( &p_input->stream.stream_lock );
1393
1394     p_vout->b_filter_change = VLC_TRUE;
1395
1396 #define ES p_input->stream.pp_es[i]
1397
1398     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1399     {
1400         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1401         {
1402             input_UnselectES( p_input, ES );
1403             input_SelectES( p_input, ES );
1404         }
1405 #undef ES
1406     }
1407     vlc_mutex_unlock( &p_input->stream.stream_lock );
1408
1409     vlc_object_release( p_input );
1410 #endif
1411
1412     val.b_bool = VLC_TRUE;
1413     var_Set( p_vout, "intf-change", val );
1414     return VLC_SUCCESS;
1415 }
1416
1417 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1418                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1419 {
1420     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1421     input_thread_t *p_input;
1422     vlc_value_t val;
1423     unsigned int i;
1424
1425     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1426                                                  FIND_PARENT );
1427
1428     if (!p_input)
1429     {
1430         msg_Err( p_vout, "Input not found" );
1431         return( VLC_EGENERIC );
1432     }
1433
1434     /* FIXME FIXME input2 --fenrir */
1435 #if 0
1436     /* Restart the video stream */
1437     vlc_mutex_lock( &p_input->stream.stream_lock );
1438
1439     p_vout->b_filter_change = VLC_TRUE;
1440
1441 #define ES p_input->stream.pp_es[i]
1442
1443     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1444     {
1445         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1446         {
1447             input_UnselectES( p_input, ES );
1448             input_SelectES( p_input, ES );
1449         }
1450 #undef ES
1451     }
1452     vlc_mutex_unlock( &p_input->stream.stream_lock );
1453
1454     vlc_object_release( p_input );
1455 #endif
1456
1457     val.b_bool = VLC_TRUE;
1458     var_Set( p_vout, "intf-change", val );
1459     return VLC_SUCCESS;
1460 }
1461