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: Clément 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     (void) p_mi; (void) d;
 194     libvlc_exception_raise(p_e, "Reparenting not supported");
 195     return -1;
 196 }
 197
 198 void libvlc_video_resize( libvlc_media_player_t *p_mi, int width, int height, libvlc_exception_t *p_e )
 199 {
 200     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 201     if( p_vout )
 202     {
 203         vout_Control( p_vout, VOUT_SET_SIZE, width, height );
 204         vlc_object_release( p_vout );
 205     }
 206 }
 207
 208 void libvlc_video_redraw_rectangle( libvlc_media_player_t *p_mi,
 209                            const libvlc_rectangle_t *area,
 210                            libvlc_exception_t *p_e )
 211 {
 212 #ifdef __APPLE__
 213     if( (NULL != area)
 214      && ((area->bottom - area->top) > 0)
 215      && ((area->right - area->left) > 0) )
 216     {
 217         vout_thread_t *p_vout = GetVout( p_mi, p_e );
 218         if( p_vout )
 219         {
 220             /* tell running vout to redraw area */
 221             vout_Control( p_vout , VOUT_REDRAW_RECT,
 222                                area->top, area->left, area->bottom, area->right );
 223             vlc_object_release( p_vout );
 224         }
 225     }
 226 #else
 227     (void) p_mi; (void) area; (void) p_e;
 228 #endif
 229 }
 230
 231 /* global video settings */
 232
 233 /* Deprecated use libvlc_media_player_set_drawable() */
 234 void libvlc_video_set_parent( libvlc_instance_t *p_instance, libvlc_drawable_t d,
 235                               libvlc_exception_t *p_e )
 236 {
 237     /* set as default for future vout instances */
 238 #ifdef WIN32
 239     vlc_value_t val;
 240
 241     if( sizeof(HWND) > sizeof(libvlc_drawable_t) )
 242         return; /* BOOM! we told you not to use this function! */
 243     val.p_address = (void *)(uintptr_t)d;
 244     var_Set( p_instance->p_libvlc_int, "drawable-hwnd", val );
 245 #elif defined(__APPLE__)
 246     var_SetInteger( p_instance->p_libvlc_int, "drawable-agl", d );
 247 #else
 248     var_SetInteger( p_instance->p_libvlc_int, "drawable-xid", d );
 249 #endif
 250
 251     libvlc_media_player_t *p_mi = libvlc_playlist_get_media_player(p_instance, p_e);
 252     if( p_mi )
 253     {
 254         libvlc_media_player_set_drawable( p_mi, d, p_e );
 255         libvlc_media_player_release(p_mi);
 256     }
 257 }
 258
 259 /* Deprecated use libvlc_media_player_get_drawable() */
 260 libvlc_drawable_t libvlc_video_get_parent( libvlc_instance_t *p_instance, libvlc_exception_t *p_e )
 261 {
 262     VLC_UNUSED(p_e);
 263
 264 #ifdef WIN32
 265     vlc_value_t val;
 266
 267     if( sizeof(HWND) > sizeof(libvlc_drawable_t) )
 268         return 0;
 269     var_Get( p_instance->p_libvlc_int, "drawable-hwnd", &val );
 270     return (uintptr_t)val.p_address;
 271 #elif defined(__APPLE__)
 272     return var_GetInteger( p_instance->p_libvlc_int, "drawable-agl" );
 273 #else
 274     return var_GetInteger( p_instance->p_libvlc_int, "drawable-xid" );
 275 #endif
 276 }
 277
 278 void libvlc_video_set_size( libvlc_instance_t *p_instance, int width, int height,
 279                            libvlc_exception_t *p_e )
 280 {
 281     /* set as default for future vout instances */
 282     config_PutInt(p_instance->p_libvlc_int, "width", width);
 283     config_PutInt(p_instance->p_libvlc_int, "height", height);
 284
 285     libvlc_media_player_t *p_mi = libvlc_playlist_get_media_player(p_instance, p_e);
 286     if( p_mi )
 287     {
 288         vout_thread_t *p_vout = GetVout( p_mi, p_e );
 289         if( p_vout )
 290         {
 291             /* tell running vout to re-size */
 292             vout_Control( p_vout , VOUT_SET_SIZE, width, height);
 293             vlc_object_release( p_vout );
 294         }
 295         libvlc_media_player_release(p_mi);
 296     }
 297 }
 298
 299 void libvlc_video_set_viewport( libvlc_instance_t *p_instance,
 300                             const libvlc_rectangle_t *view, const libvlc_rectangle_t *clip,
 301                            libvlc_exception_t *p_e )
 302 {
 303 #ifdef __APPLE__
 304     if( !view )
 305     {
 306         libvlc_exception_raise( p_e, "viewport is NULL" );
 307         return;
 308     }
 309
 310     /* if clip is NULL, then use view rectangle as clip */
 311     if( !clip )
 312         clip = view;
 313
 314     /* set as default for future vout instances */
 315     var_SetInteger( p_instance->p_libvlc_int, "drawable-view-top", view->top );
 316     var_SetInteger( p_instance->p_libvlc_int, "drawable-view-left", view->left );
 317     var_SetInteger( p_instance->p_libvlc_int, "drawable-view-bottom", view->bottom );
 318     var_SetInteger( p_instance->p_libvlc_int, "drawable-view-right", view->right );
 319     var_SetInteger( p_instance->p_libvlc_int, "drawable-clip-top", clip->top );
 320     var_SetInteger( p_instance->p_libvlc_int, "drawable-clip-left", clip->left );
 321     var_SetInteger( p_instance->p_libvlc_int, "drawable-clip-bottom", clip->bottom );
 322     var_SetInteger( p_instance->p_libvlc_int, "drawable-clip-right", clip->right );
 323
 324     libvlc_media_player_t *p_mi = libvlc_playlist_get_media_player(p_instance, p_e);
 325     if( p_mi )
 326     {
 327         vout_thread_t *p_vout = GetVout( p_mi, p_e );
 328         if( p_vout )
 329         {
 330             /* change viewport for running vout */
 331             vout_Control( p_vout , VOUT_SET_VIEWPORT,
 332                                view->top, view->left, view->bottom, view->right,
 333                                clip->top, clip->left, clip->bottom, clip->right );
 334             vlc_object_release( p_vout );
 335         }
 336         libvlc_media_player_release(p_mi);
 337     }
 338 #else
 339     (void) p_instance; (void) view; (void) clip; (void) p_e;
 340 #endif
 341 }
 342
 343 char *libvlc_video_get_aspect_ratio( libvlc_media_player_t *p_mi,
 344                                      libvlc_exception_t *p_e )
 345 {
 346     char *psz_aspect = 0;
 347     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 348
 349     if( !p_vout ) return 0;
 350
 351     psz_aspect = var_GetNonEmptyString( p_vout, "aspect-ratio" );
 352     vlc_object_release( p_vout );
 353     return psz_aspect ? psz_aspect : strdup("");
 354 }
 355
 356 void libvlc_video_set_aspect_ratio( libvlc_media_player_t *p_mi,
 357                                     char *psz_aspect, libvlc_exception_t *p_e )
 358 {
 359     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 360     int i_ret = -1;
 361
 362     if( !p_vout ) return;
 363
 364     i_ret = var_SetString( p_vout, "aspect-ratio", psz_aspect );
 365     if( i_ret )
 366         libvlc_exception_raise( p_e,
 367                         "Unexpected error while setting aspect-ratio value" );
 368
 369     vlc_object_release( p_vout );
 370 }
 371
 372 int libvlc_video_get_spu( libvlc_media_player_t *p_mi,
 373                           libvlc_exception_t *p_e )
 374 {
 375     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 376     vlc_value_t val_list;
 377     vlc_value_t val;
 378     int i_spu = -1;
 379     int i_ret = -1;
 380     int i;
 381
 382     if( !p_input_thread ) return -1;
 383
 384     i_ret = var_Get( p_input_thread, "spu-es", &val );
 385     if( i_ret < 0 )
 386     {
 387         libvlc_exception_raise( p_e, "Getting subtitle information failed" );
 388         vlc_object_release( p_input_thread );
 389         return i_ret;
 390     }
 391
 392     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 393     for( i = 0; i < val_list.p_list->i_count; i++ )
 394     {
 395         vlc_value_t spu_val = val_list.p_list->p_values[i];
 396         if( val.i_int == spu_val.i_int )
 397         {
 398             i_spu = i;
 399             break;
 400         }
 401     }
 402     vlc_object_release( p_input_thread );
 403     return i_spu;
 404 }
 405
 406 int libvlc_video_get_spu_count( libvlc_media_player_t *p_mi,
 407                                 libvlc_exception_t *p_e )
 408 {
 409     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 410     vlc_value_t val_list;
 411
 412     if( !p_input_thread )
 413         return -1;
 414
 415     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 416     vlc_object_release( p_input_thread );
 417     return val_list.p_list->i_count;
 418 }
 419
 420 libvlc_track_description_t *
 421         libvlc_video_get_spu_description( libvlc_media_player_t *p_mi,
 422                                           libvlc_exception_t *p_e )
 423 {
 424     return libvlc_get_track_description( p_mi, "spu-es", p_e);
 425 }
 426
 427 void libvlc_video_set_spu( libvlc_media_player_t *p_mi, int i_spu,
 428                            libvlc_exception_t *p_e )
 429 {
 430     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 431     vlc_value_t val_list;
 432     vlc_value_t newval;
 433     int i_ret = -1;
 434
 435     if( !p_input_thread ) return;
 436
 437     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 438
 439     if( val_list.p_list->i_count == 0 )
 440     {
 441         libvlc_exception_raise( p_e, "Subtitle value out of range" );
 442         vlc_object_release( p_input_thread );
 443         return;
 444     }
 445
 446     if( (i_spu < 0) && (i_spu > val_list.p_list->i_count) )
 447     {
 448         libvlc_exception_raise( p_e, "Subtitle value out of range" );
 449         vlc_object_release( p_input_thread );
 450         return;
 451     }
 452
 453     newval = val_list.p_list->p_values[i_spu];
 454     i_ret = var_Set( p_input_thread, "spu-es", newval );
 455     if( i_ret < 0 )
 456     {
 457         libvlc_exception_raise( p_e, "Setting subtitle value failed" );
 458     }
 459     vlc_object_release( p_input_thread );
 460 }
 461
 462 int libvlc_video_set_subtitle_file( libvlc_media_player_t *p_mi,
 463                                     char *psz_subtitle,
 464                                     libvlc_exception_t *p_e )
 465 {
 466     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 467     bool b_ret = false;
 468
 469     if( p_input_thread )
 470     {
 471         if( !input_AddSubtitle( p_input_thread, psz_subtitle, true ) )
 472             b_ret = true;
 473         vlc_object_release( p_input_thread );
 474     }
 475     return b_ret;
 476 }
 477
 478 libvlc_track_description_t *
 479         libvlc_video_get_title_description( libvlc_media_player_t *p_mi,
 480                                             libvlc_exception_t * p_e )
 481 {
 482     return libvlc_get_track_description( p_mi, "title", p_e);
 483 }
 484
 485 libvlc_track_description_t *
 486         libvlc_video_get_chapter_description( libvlc_media_player_t *p_mi,
 487                                               int i_title,
 488                                               libvlc_exception_t *p_e )
 489 {
 490     char psz_title[12];
 491     sprintf( psz_title,  "title %2i", i_title );
 492     return libvlc_get_track_description( p_mi, psz_title, p_e);
 493 }
 494
 495 char *libvlc_video_get_crop_geometry( libvlc_media_player_t *p_mi,
 496                                    libvlc_exception_t *p_e )
 497 {
 498     char *psz_geometry = 0;
 499     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 500
 501     if( !p_vout ) return 0;
 502
 503     psz_geometry = var_GetNonEmptyString( p_vout, "crop" );
 504     vlc_object_release( p_vout );
 505     return psz_geometry ? psz_geometry : strdup("");
 506 }
 507
 508 void libvlc_video_set_crop_geometry( libvlc_media_player_t *p_mi,
 509                                     char *psz_geometry, libvlc_exception_t *p_e )
 510 {
 511     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 512     int i_ret = -1;
 513
 514     if( !p_vout ) return;
 515
 516     i_ret = var_SetString( p_vout, "crop", psz_geometry );
 517     if( i_ret )
 518         libvlc_exception_raise( p_e,
 519                         "Unexpected error while setting crop geometry" );
 520
 521     vlc_object_release( p_vout );
 522 }
 523
 524 int libvlc_video_get_teletext( libvlc_media_player_t *p_mi,
 525                                libvlc_exception_t *p_e )
 526 {
 527     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 528     vlc_object_t *p_vbi;
 529     int i_ret = -1;
 530
 531     if( !p_vout ) return i_ret;
 532
 533     p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
 534                                                    FIND_CHILD );
 535     if( p_vbi )
 536     {
 537         i_ret = var_GetInteger( p_vbi, "vbi-page" );
 538         vlc_object_release( p_vbi );
 539     }
 540
 541     vlc_object_release( p_vout );
 542     return i_ret;
 543 }
 544
 545 void libvlc_video_set_teletext( libvlc_media_player_t *p_mi, int i_page,
 546                                 libvlc_exception_t *p_e )
 547 {
 548     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 549     vlc_object_t *p_vbi;
 550     int i_ret = -1;
 551
 552     if( !p_vout ) return;
 553
 554     p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
 555                                                    FIND_CHILD );
 556     if( p_vbi )
 557     {
 558         i_ret = var_SetInteger( p_vbi, "vbi-page", i_page );
 559         vlc_object_release( p_vbi );
 560         if( i_ret )
 561             libvlc_exception_raise( p_e,
 562                             "Unexpected error while setting teletext page" );
 563     }
 564     vlc_object_release( p_vout );
 565 }
 566
 567 void libvlc_toggle_teletext( libvlc_media_player_t *p_mi,
 568                              libvlc_exception_t *p_e )
 569 {
 570     input_thread_t *p_input_thread;
 571     vlc_object_t *p_vbi;
 572     int i_ret;
 573
 574     p_input_thread = libvlc_get_input_thread(p_mi, p_e);
 575     if( !p_input_thread ) return;
 576
 577     if( var_CountChoices( p_input_thread, "teletext-es" ) <= 0 )
 578     {
 579         vlc_object_release( p_input_thread );
 580         return;
 581     }
 582     const bool b_selected = var_GetInteger( p_input_thread, "teletext-es" ) >= 0;
 583
 584     p_vbi = (vlc_object_t *)vlc_object_find_name( p_input_thread, "zvbi",
 585                                                   FIND_CHILD );
 586     if( p_vbi )
 587     {
 588         if( b_selected )
 589         {
 590             /* FIXME Gni, why that ? */
 591             i_ret = var_SetInteger( p_vbi, "vbi-page",
 592                                     var_GetInteger( p_vbi, "vbi-page" ) );
 593             if( i_ret )
 594                 libvlc_exception_raise( p_e,
 595                                 "Unexpected error while setting teletext page" );
 596         }
 597         else
 598         {
 599             /* FIXME Gni^2 */
 600             i_ret = var_SetBool( p_vbi, "vbi-opaque",
 601                                  !var_GetBool( p_vbi, "vbi-opaque" ) );
 602             if( i_ret )
 603                 libvlc_exception_raise( p_e,
 604                                 "Unexpected error while setting teletext transparency" );
 605         }
 606         vlc_object_release( p_vbi );
 607     }
 608     else if( b_selected )
 609     {
 610         var_SetInteger( p_input_thread, "spu-es", -1 );
 611     }
 612     else
 613     {
 614         vlc_value_t list;
 615         if( !var_Change( p_input_thread, "teletext-es", VLC_VAR_GETLIST, &list, NULL ) )
 616         {
 617             if( list.p_list->i_count > 0 )
 618                 var_SetInteger( p_input_thread, "spu-es", list.p_list->p_values[0].i_int );
 619
 620             var_Change( p_input_thread, "teletext-es", VLC_VAR_FREELIST, &list, NULL );
 621         }
 622     }
 623     vlc_object_release( p_input_thread );
 624 }
 625
 626 int libvlc_video_get_track_count( libvlc_media_player_t *p_mi,
 627                                   libvlc_exception_t *p_e )
 628 {
 629     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 630     vlc_value_t val_list;
 631
 632     if( !p_input_thread )
 633         return -1;
 634
 635     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 636     vlc_object_release( p_input_thread );
 637     return val_list.p_list->i_count;
 638 }
 639
 640 libvlc_track_description_t *
 641         libvlc_video_get_track_description( libvlc_media_player_t *p_mi,
 642                                             libvlc_exception_t *p_e )
 643 {
 644     return libvlc_get_track_description( p_mi, "video-es", p_e);
 645 }
 646
 647 int libvlc_video_get_track( libvlc_media_player_t *p_mi,
 648                             libvlc_exception_t *p_e )
 649 {
 650     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 651     vlc_value_t val_list;
 652     vlc_value_t val;
 653     int i_track = -1;
 654     int i_ret = -1;
 655     int i;
 656
 657     if( !p_input_thread )
 658         return -1;
 659
 660     i_ret = var_Get( p_input_thread, "video-es", &val );
 661     if( i_ret < 0 )
 662     {
 663         libvlc_exception_raise( p_e, "Getting Video track information failed" );
 664         vlc_object_release( p_input_thread );
 665         return i_ret;
 666     }
 667
 668     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 669     for( i = 0; i < val_list.p_list->i_count; i++ )
 670     {
 671         vlc_value_t track_val = val_list.p_list->p_values[i];
 672         if( track_val.i_int == val.i_int )
 673         {
 674             i_track = i;
 675             break;
 676        }
 677     }
 678     vlc_object_release( p_input_thread );
 679     return i_track;
 680 }
 681
 682 void libvlc_video_set_track( libvlc_media_player_t *p_mi, int i_track,
 683                              libvlc_exception_t *p_e )
 684 {
 685     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 686     vlc_value_t val_list;
 687     int i_ret = -1;
 688     int i;
 689
 690     if( !p_input_thread )
 691         return;
 692
 693     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 694     for( i = 0; i < val_list.p_list->i_count; i++ )
 695     {
 696         vlc_value_t val = val_list.p_list->p_values[i];
 697         if( i_track == val.i_int )
 698         {
 699             i_ret = var_Set( p_input_thread, "audio-es", val );
 700             if( i_ret < 0 )
 701                 libvlc_exception_raise( p_e, "Setting video track failed" );
 702             vlc_object_release( p_input_thread );
 703             return;
 704         }
 705     }
 706     libvlc_exception_raise( p_e, "Video track out of range" );
 707     vlc_object_release( p_input_thread );
 708 }
 709
 710 int libvlc_video_destroy( libvlc_media_player_t *p_mi,
 711                           libvlc_exception_t *p_e )
 712 {
 713     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 714     vlc_object_detach( p_vout );
 715     vlc_object_release( p_vout );
 716     vlc_object_release( p_vout );
 717
 718     return 0;
 719 }