git.sesse.net Git - vlc/blob - src/control/video.c

   1 /*****************************************************************************
   2  * video.c: libvlc new API video functions
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  *
   6  * $Id$
   7  *
   8  * Authors: Cl�ent Stenac <zorglub@videolan.org>
   9  *          Filippo Carone <littlejohn@videolan.org>
  10  *          Jean-Paul Saman <jpsaman _at_ m2x _dot_ nl>
  11  *          Damien Fouilleul <damienf a_t videolan dot org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  26  *****************************************************************************/
  27
  28 #include "libvlc_internal.h"
  29
  30 #include <vlc/libvlc.h>
  31 #include <vlc_input.h>
  32 #include <vlc_vout.h>
  33
  34 /*
  35  * Remember to release the returned vout_thread_t.
  36  */
  37 static vout_thread_t *GetVout( libvlc_media_player_t *p_mi,
  38                                libvlc_exception_t *p_exception )
  39 {
  40     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_exception );
  41     vout_thread_t *p_vout = NULL;
  42
  43     if( p_input_thread )
  44     {
  45         p_vout = vlc_object_find( p_input_thread, VLC_OBJECT_VOUT, FIND_CHILD );
  46         if( !p_vout )
  47         {
  48             libvlc_exception_raise( p_exception, "No active video output" );
  49         }
  50         vlc_object_release( p_input_thread );
  51     }
  52     return p_vout;
  53 }
  54
  55 /**********************************************************************
  56  * Exported functions
  57  **********************************************************************/
  58
  59 void libvlc_set_fullscreen( libvlc_media_player_t *p_mi, int b_fullscreen,
  60                             libvlc_exception_t *p_e )
  61 {
  62     /* We only work on the first vout */
  63     vout_thread_t *p_vout = GetVout( p_mi, p_e );
  64
  65     /* GetVout will raise the exception for us */
  66     if( !p_vout ) return;
  67
  68     var_SetBool( p_vout, "fullscreen", b_fullscreen );
  69
  70     vlc_object_release( p_vout );
  71 }
  72
  73 int libvlc_get_fullscreen( libvlc_media_player_t *p_mi,
  74                             libvlc_exception_t *p_e )
  75 {
  76     /* We only work on the first vout */
  77     vout_thread_t *p_vout = GetVout( p_mi, p_e );
  78     int i_ret;
  79
  80     /* GetVout will raise the exception for us */
  81     if( !p_vout ) return 0;
  82
  83     i_ret = var_GetBool( p_vout, "fullscreen" );
  84
  85     vlc_object_release( p_vout );
  86
  87     return i_ret;
  88 }
  89
  90 void libvlc_toggle_fullscreen( libvlc_media_player_t *p_mi,
  91                                libvlc_exception_t *p_e )
  92 {
  93     /* We only work on the first vout */
  94     vout_thread_t *p_vout = GetVout( p_mi, p_e );
  95     bool ret;
  96
  97     /* GetVout will raise the exception for us */
  98     if( !p_vout ) return;
  99
 100     ret = var_GetBool( p_vout, "fullscreen" );
 101     var_SetBool( p_vout, "fullscreen", !ret );
 102
 103     vlc_object_release( p_vout );
 104 }
 105
 106 void
 107 libvlc_video_take_snapshot( libvlc_media_player_t *p_mi, char *psz_filepath,
 108         unsigned int i_width, unsigned int i_height, libvlc_exception_t *p_e )
 109 {
 110     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 111     input_thread_t *p_input_thread;
 112
 113     /* GetVout will raise the exception for us */
 114     if( !p_vout ) return;
 115
 116     if( !psz_filepath )
 117     {
 118         libvlc_exception_raise( p_e, "filepath is null" );
 119         return;
 120     }
 121
 122     var_SetInteger( p_vout, "snapshot-width", i_width );
 123     var_SetInteger( p_vout, "snapshot-height", i_height );
 124
 125     p_input_thread = p_mi->p_input_thread;
 126     if( !p_mi->p_input_thread )
 127     {
 128         libvlc_exception_raise( p_e, "Input does not exist" );
 129         return;
 130     }
 131
 132     var_SetString( p_vout, "snapshot-path", psz_filepath );
 133     var_SetString( p_vout, "snapshot-format", "png" );
 134
 135     var_TriggerCallback( p_vout, "video-snapshot" );
 136     vlc_object_release( p_vout );
 137 }
 138
 139 int libvlc_video_get_height( libvlc_media_player_t *p_mi,
 140                              libvlc_exception_t *p_e )
 141 {
 142     int height;
 143
 144     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 145     if( !p_vout ) return 0;
 146
 147     height = p_vout->i_window_height;
 148
 149     vlc_object_release( p_vout );
 150
 151     return height;
 152 }
 153
 154 int libvlc_video_get_width( libvlc_media_player_t *p_mi,
 155                             libvlc_exception_t *p_e )
 156 {
 157     int width;
 158
 159     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 160     if( !p_vout ) return 0;
 161
 162     width = p_vout->i_window_width;
 163
 164     vlc_object_release( p_vout );
 165
 166     return width;
 167 }
 168
 169 int libvlc_media_player_has_vout( libvlc_media_player_t *p_mi,
 170                                      libvlc_exception_t *p_e )
 171 {
 172     input_thread_t *p_input_thread = libvlc_get_input_thread(p_mi, p_e);
 173     bool has_vout = false;
 174
 175     if( p_input_thread )
 176     {
 177         vout_thread_t *p_vout;
 178
 179         p_vout = vlc_object_find( p_input_thread, VLC_OBJECT_VOUT, FIND_CHILD );
 180         if( p_vout )
 181         {
 182             has_vout = true;
 183             vlc_object_release( p_vout );
 184         }
 185         vlc_object_release( p_input_thread );
 186     }
 187     return has_vout;
 188 }
 189
 190 int libvlc_video_reparent( libvlc_media_player_t *p_mi, libvlc_drawable_t d,
 191                            libvlc_exception_t *p_e )
 192 {
 193     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 194
 195     if( p_vout )
 196     {
 197         vout_Control( p_vout , VOUT_REPARENT, d);
 198         vlc_object_release( p_vout );
 199     }
 200     return 0;
 201 }
 202
 203 void libvlc_video_resize( libvlc_media_player_t *p_mi, int width, int height, libvlc_exception_t *p_e )
 204 {
 205     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 206     if( p_vout )
 207     {
 208         vout_Control( p_vout, VOUT_SET_SIZE, width, height );
 209         vlc_object_release( p_vout );
 210     }
 211 }
 212
 213 void libvlc_video_redraw_rectangle( libvlc_media_player_t *p_mi,
 214                            const libvlc_rectangle_t *area,
 215                            libvlc_exception_t *p_e )
 216 {
 217 #ifdef __APPLE__
 218     if( (NULL != area)
 219      && ((area->bottom - area->top) > 0)
 220      && ((area->right - area->left) > 0) )
 221     {
 222         vout_thread_t *p_vout = GetVout( p_mi, p_e );
 223         if( p_vout )
 224         {
 225             /* tell running vout to redraw area */
 226             vout_Control( p_vout , VOUT_REDRAW_RECT,
 227                                area->top, area->left, area->bottom, area->right );
 228             vlc_object_release( p_vout );
 229         }
 230     }
 231 #else
 232     (void) p_mi; (void) area; (void) p_e;
 233 #endif
 234 }
 235
 236 /* global video settings */
 237
 238 /* Deprecated use libvlc_media_player_set_drawable() */
 239 void libvlc_video_set_parent( libvlc_instance_t *p_instance, libvlc_drawable_t d,
 240                               libvlc_exception_t *p_e )
 241 {
 242     /* set as default for future vout instances */
 243 #ifdef WIN32
 244     vlc_value_t val;
 245
 246     if( sizeof(HWND) > sizeof(libvlc_drawable_t) )
 247         return; /* BOOM! we told you not to use this function! */
 248     val.p_address = (void *)(uintptr_t)d;
 249     var_Set( p_instance->p_libvlc_int, "drawable-hwnd", val );
 250 #else
 251     var_SetInteger( p_instance->p_libvlc_int, "drawable-xid", d );
 252 #endif
 253
 254     libvlc_media_player_t *p_mi = libvlc_playlist_get_media_player(p_instance, p_e);
 255     if( p_mi )
 256     {
 257         libvlc_media_player_set_drawable( p_mi, d, p_e );
 258         libvlc_media_player_release(p_mi);
 259     }
 260 }
 261
 262 /* Deprecated use libvlc_media_player_get_drawable() */
 263 libvlc_drawable_t libvlc_video_get_parent( libvlc_instance_t *p_instance, libvlc_exception_t *p_e )
 264 {
 265     VLC_UNUSED(p_e);
 266
 267 #ifdef WIN32
 268     vlc_value_t val;
 269
 270     if( sizeof(HWND) > sizeof(libvlc_drawable_t) )
 271         return 0;
 272     var_Get( p_instance->p_libvlc_int, "drawable-hwnd", &val );
 273     return (uintptr_t)val.p_address;
 274 #else
 275     return var_GetInteger( p_instance->p_libvlc_int, "drawable-xid" );
 276 #endif
 277 }
 278
 279
 280 void libvlc_video_set_size( libvlc_instance_t *p_instance, int width, int height,
 281                            libvlc_exception_t *p_e )
 282 {
 283     /* set as default for future vout instances */
 284     config_PutInt(p_instance->p_libvlc_int, "width", width);
 285     config_PutInt(p_instance->p_libvlc_int, "height", height);
 286
 287     libvlc_media_player_t *p_mi = libvlc_playlist_get_media_player(p_instance, p_e);
 288     if( p_mi )
 289     {
 290         vout_thread_t *p_vout = GetVout( p_mi, p_e );
 291         if( p_vout )
 292         {
 293             /* tell running vout to re-size */
 294             vout_Control( p_vout , VOUT_SET_SIZE, width, height);
 295             vlc_object_release( p_vout );
 296         }
 297         libvlc_media_player_release(p_mi);
 298     }
 299 }
 300
 301 void libvlc_video_set_viewport( libvlc_instance_t *p_instance,
 302                             const libvlc_rectangle_t *view, const libvlc_rectangle_t *clip,
 303                            libvlc_exception_t *p_e )
 304 {
 305 #ifdef __APPLE__
 306     if( !view )
 307     {
 308         libvlc_exception_raise( p_e, "viewport is NULL" );
 309         return;
 310     }
 311
 312     /* if clip is NULL, then use view rectangle as clip */
 313     if( !clip )
 314         clip = view;
 315
 316     /* set as default for future vout instances */
 317     var_SetInteger( p_instance->p_libvlc_int, "drawable-view-top", view->top );
 318     var_SetInteger( p_instance->p_libvlc_int, "drawable-view-left", view->left );
 319     var_SetInteger( p_instance->p_libvlc_int, "drawable-view-bottom", view->bottom );
 320     var_SetInteger( p_instance->p_libvlc_int, "drawable-view-right", view->right );
 321     var_SetInteger( p_instance->p_libvlc_int, "drawable-clip-top", clip->top );
 322     var_SetInteger( p_instance->p_libvlc_int, "drawable-clip-left", clip->left );
 323     var_SetInteger( p_instance->p_libvlc_int, "drawable-clip-bottom", clip->bottom );
 324     var_SetInteger( p_instance->p_libvlc_int, "drawable-clip-right", clip->right );
 325
 326     libvlc_media_player_t *p_mi = libvlc_playlist_get_media_player(p_instance, p_e);
 327     if( p_mi )
 328     {
 329         vout_thread_t *p_vout = GetVout( p_mi, p_e );
 330         if( p_vout )
 331         {
 332             /* change viewport for running vout */
 333             vout_Control( p_vout , VOUT_SET_VIEWPORT,
 334                                view->top, view->left, view->bottom, view->right,
 335                                clip->top, clip->left, clip->bottom, clip->right );
 336             vlc_object_release( p_vout );
 337         }
 338         libvlc_media_player_release(p_mi);
 339     }
 340 #else
 341     (void) p_instance; (void) view; (void) clip; (void) p_e;
 342 #endif
 343 }
 344
 345 char *libvlc_video_get_aspect_ratio( libvlc_media_player_t *p_mi,
 346                                      libvlc_exception_t *p_e )
 347 {
 348     char *psz_aspect = 0;
 349     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 350
 351     if( !p_vout ) return 0;
 352
 353     psz_aspect = var_GetNonEmptyString( p_vout, "aspect-ratio" );
 354     vlc_object_release( p_vout );
 355     return psz_aspect ? psz_aspect : strdup("");
 356 }
 357
 358 void libvlc_video_set_aspect_ratio( libvlc_media_player_t *p_mi,
 359                                     char *psz_aspect, libvlc_exception_t *p_e )
 360 {
 361     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 362     int i_ret = -1;
 363
 364     if( !p_vout ) return;
 365
 366     i_ret = var_SetString( p_vout, "aspect-ratio", psz_aspect );
 367     if( i_ret )
 368         libvlc_exception_raise( p_e,
 369                         "Unexpected error while setting aspect-ratio value" );
 370
 371     vlc_object_release( p_vout );
 372 }
 373
 374 int libvlc_video_get_spu( libvlc_media_player_t *p_mi,
 375                           libvlc_exception_t *p_e )
 376 {
 377     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 378     vlc_value_t val_list;
 379     vlc_value_t val;
 380     int i_spu = -1;
 381     int i_ret = -1;
 382     int i;
 383
 384     if( !p_input_thread ) return -1;
 385
 386     i_ret = var_Get( p_input_thread, "spu-es", &val );
 387     if( i_ret < 0 )
 388     {
 389         libvlc_exception_raise( p_e, "Getting subtitle information failed" );
 390         vlc_object_release( p_input_thread );
 391         return i_ret;
 392     }
 393
 394     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 395     for( i = 0; i < val_list.p_list->i_count; i++ )
 396     {
 397         vlc_value_t spu_val = val_list.p_list->p_values[i];
 398         if( val.i_int == spu_val.i_int )
 399         {
 400             i_spu = i;
 401             break;
 402         }
 403     }
 404     vlc_object_release( p_input_thread );
 405     return i_spu;
 406 }
 407
 408 int libvlc_video_get_spu_count( libvlc_media_player_t *p_mi,
 409                                 libvlc_exception_t *p_e )
 410 {
 411     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 412     vlc_value_t val_list;
 413
 414     if( !p_input_thread )
 415         return -1;
 416
 417     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 418     vlc_object_release( p_input_thread );
 419     return val_list.p_list->i_count;
 420 }
 421
 422 libvlc_track_description_t *
 423         libvlc_video_get_spu_description( libvlc_media_player_t *p_mi,
 424                                           libvlc_exception_t *p_e )
 425 {
 426     return libvlc_get_track_description( p_mi, "spu-es", p_e);
 427 }
 428
 429 void libvlc_video_set_spu( libvlc_media_player_t *p_mi, int i_spu,
 430                            libvlc_exception_t *p_e )
 431 {
 432     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 433     vlc_value_t val_list;
 434     vlc_value_t newval;
 435     int i_ret = -1;
 436
 437     if( !p_input_thread ) return;
 438
 439     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 440     if( (i_spu < 0) && (i_spu > val_list.p_list->i_count) )
 441     {
 442         libvlc_exception_raise( p_e, "Subtitle value out of range" );
 443         vlc_object_release( p_input_thread );
 444         return;
 445     }
 446
 447     newval = val_list.p_list->p_values[i_spu];
 448     i_ret = var_Set( p_input_thread, "spu-es", newval );
 449     if( i_ret < 0 )
 450     {
 451         libvlc_exception_raise( p_e, "Setting subtitle value failed" );
 452     }
 453     vlc_object_release( p_input_thread );
 454 }
 455
 456 int libvlc_video_set_subtitle_file( libvlc_media_player_t *p_mi,
 457                                     char *psz_subtitle,
 458                                     libvlc_exception_t *p_e )
 459 {
 460     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 461     bool b_ret = false;
 462
 463     if( p_input_thread )
 464     {
 465         if( !input_AddSubtitle( p_input_thread, psz_subtitle, true ) )
 466             b_ret = true;
 467         vlc_object_release( p_input_thread );
 468     }
 469     return b_ret;
 470 }
 471
 472 libvlc_track_description_t *
 473         libvlc_video_get_title_description( libvlc_media_player_t *p_mi,
 474                                             libvlc_exception_t * p_e )
 475 {
 476     return libvlc_get_track_description( p_mi, "title", p_e);
 477 }
 478
 479 libvlc_track_description_t *
 480         libvlc_video_get_chapter_description( libvlc_media_player_t *p_mi,
 481                                               int i_title,
 482                                               libvlc_exception_t *p_e )
 483 {
 484     char psz_title[12];
 485     sprintf( psz_title,  "title %2i", i_title );
 486     return libvlc_get_track_description( p_mi, psz_title, p_e);
 487 }
 488
 489 char *libvlc_video_get_crop_geometry( libvlc_media_player_t *p_mi,
 490                                    libvlc_exception_t *p_e )
 491 {
 492     char *psz_geometry = 0;
 493     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 494
 495     if( !p_vout ) return 0;
 496
 497     psz_geometry = var_GetNonEmptyString( p_vout, "crop" );
 498     vlc_object_release( p_vout );
 499     return psz_geometry ? psz_geometry : strdup("");
 500 }
 501
 502 void libvlc_video_set_crop_geometry( libvlc_media_player_t *p_mi,
 503                                     char *psz_geometry, libvlc_exception_t *p_e )
 504 {
 505     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 506     int i_ret = -1;
 507
 508     if( !p_vout ) return;
 509
 510     i_ret = var_SetString( p_vout, "crop", psz_geometry );
 511     if( i_ret )
 512         libvlc_exception_raise( p_e,
 513                         "Unexpected error while setting crop geometry" );
 514
 515     vlc_object_release( p_vout );
 516 }
 517
 518 int libvlc_video_get_teletext( libvlc_media_player_t *p_mi,
 519                                libvlc_exception_t *p_e )
 520 {
 521     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 522     vlc_object_t *p_vbi;
 523     int i_ret = -1;
 524
 525     if( !p_vout ) return i_ret;
 526
 527     p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
 528                                                    FIND_CHILD );
 529     if( p_vbi )
 530     {
 531         i_ret = var_GetInteger( p_vbi, "vbi-page" );
 532         vlc_object_release( p_vbi );
 533     }
 534
 535     vlc_object_release( p_vout );
 536     return i_ret;
 537 }
 538
 539 void libvlc_video_set_teletext( libvlc_media_player_t *p_mi, int i_page,
 540                                 libvlc_exception_t *p_e )
 541 {
 542     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 543     vlc_object_t *p_vbi;
 544     int i_ret = -1;
 545
 546     if( !p_vout ) return;
 547
 548     p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
 549                                                    FIND_CHILD );
 550     if( p_vbi )
 551     {
 552         i_ret = var_SetInteger( p_vbi, "vbi-page", i_page );
 553         vlc_object_release( p_vbi );
 554         if( i_ret )
 555             libvlc_exception_raise( p_e,
 556                             "Unexpected error while setting teletext page" );
 557     }
 558     vlc_object_release( p_vout );
 559 }
 560
 561 void libvlc_toggle_teletext( libvlc_media_player_t *p_mi,
 562                              libvlc_exception_t *p_e )
 563 {
 564     input_thread_t *p_input_thread;
 565     vlc_object_t *p_vbi;
 566     int i_ret;
 567
 568     p_input_thread = libvlc_get_input_thread(p_mi, p_e);
 569     if( !p_input_thread ) return;
 570
 571     if( var_CountChoices( p_input_thread, "teletext-es" ) <= 0 )
 572     {
 573         vlc_object_release( p_input_thread );
 574         return;
 575     }
 576     const bool b_selected = var_GetInteger( p_input_thread, "teletext-es" ) >= 0;
 577
 578     p_vbi = (vlc_object_t *)vlc_object_find_name( p_input_thread, "zvbi",
 579                                                   FIND_CHILD );
 580     if( p_vbi )
 581     {
 582         if( b_selected )
 583         {
 584             /* FIXME Gni, why that ? */
 585             i_ret = var_SetInteger( p_vbi, "vbi-page",
 586                                     var_GetInteger( p_vbi, "vbi-page" ) );
 587             if( i_ret )
 588                 libvlc_exception_raise( p_e,
 589                                 "Unexpected error while setting teletext page" );
 590         }
 591         else
 592         {
 593             /* FIXME Gni^2 */
 594             i_ret = var_SetBool( p_vbi, "vbi-opaque",
 595                                  !var_GetBool( p_vbi, "vbi-opaque" ) );
 596             if( i_ret )
 597                 libvlc_exception_raise( p_e,
 598                                 "Unexpected error while setting teletext transparency" );
 599         }
 600         vlc_object_release( p_vbi );
 601     }
 602     else if( b_selected )
 603     {
 604         var_SetInteger( p_input_thread, "spu-es", -1 );
 605     }
 606     else
 607     {
 608         vlc_value_t list;
 609         if( !var_Change( p_input_thread, "teletext-es", VLC_VAR_GETLIST, &list, NULL ) )
 610         {
 611             if( list.p_list->i_count > 0 )
 612                 var_SetInteger( p_input_thread, "spu-es", list.p_list->p_values[0].i_int );
 613
 614             var_Change( p_input_thread, "teletext-es", VLC_VAR_FREELIST, &list, NULL );
 615         }
 616     }
 617     vlc_object_release( p_input_thread );
 618 }
 619
 620 int libvlc_video_get_track_count( libvlc_media_player_t *p_mi,
 621                                   libvlc_exception_t *p_e )
 622 {
 623     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 624     vlc_value_t val_list;
 625
 626     if( !p_input_thread )
 627         return -1;
 628
 629     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 630     vlc_object_release( p_input_thread );
 631     return val_list.p_list->i_count;
 632 }
 633
 634 libvlc_track_description_t *
 635         libvlc_video_get_track_description( libvlc_media_player_t *p_mi,
 636                                             libvlc_exception_t *p_e )
 637 {
 638     return libvlc_get_track_description( p_mi, "video-es", p_e);
 639 }
 640
 641 int libvlc_video_get_track( libvlc_media_player_t *p_mi,
 642                             libvlc_exception_t *p_e )
 643 {
 644     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 645     vlc_value_t val_list;
 646     vlc_value_t val;
 647     int i_track = -1;
 648     int i_ret = -1;
 649     int i;
 650
 651     if( !p_input_thread )
 652         return -1;
 653
 654     i_ret = var_Get( p_input_thread, "video-es", &val );
 655     if( i_ret < 0 )
 656     {
 657         libvlc_exception_raise( p_e, "Getting Video track information failed" );
 658         vlc_object_release( p_input_thread );
 659         return i_ret;
 660     }
 661
 662     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 663     for( i = 0; i < val_list.p_list->i_count; i++ )
 664     {
 665         vlc_value_t track_val = val_list.p_list->p_values[i];
 666         if( track_val.i_int == val.i_int )
 667         {
 668             i_track = i;
 669             break;
 670        }
 671     }
 672     vlc_object_release( p_input_thread );
 673     return i_track;
 674 }
 675
 676 void libvlc_video_set_track( libvlc_media_player_t *p_mi, int i_track,
 677                              libvlc_exception_t *p_e )
 678 {
 679     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 680     vlc_value_t val_list;
 681     int i_ret = -1;
 682     int i;
 683
 684     if( !p_input_thread )
 685         return;
 686
 687     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 688     for( i = 0; i < val_list.p_list->i_count; i++ )
 689     {
 690         vlc_value_t val = val_list.p_list->p_values[i];
 691         if( i_track == val.i_int )
 692         {
 693             i_ret = var_Set( p_input_thread, "audio-es", val );
 694             if( i_ret < 0 )
 695                 libvlc_exception_raise( p_e, "Setting video track failed" );
 696             vlc_object_release( p_input_thread );
 697             return;
 698         }
 699     }
 700     libvlc_exception_raise( p_e, "Video track out of range" );
 701     vlc_object_release( p_input_thread );
 702 }
 703
 704 int libvlc_video_destroy( libvlc_media_player_t *p_mi,
 705                           libvlc_exception_t *p_e )
 706 {
 707     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 708     vlc_object_detach( p_vout );
 709     vlc_object_release( p_vout );
 710     vlc_object_release( p_vout );
 711
 712     return 0;
 713 }