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