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