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

   1 /*****************************************************************************
   2  * media_player.c: Libvlc API Media Instance management functions
   3  *****************************************************************************
   4  * Copyright (C) 2005-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <assert.h>
  29
  30 #include <vlc/libvlc.h>
  31 #include <vlc/libvlc_media.h>
  32 #include <vlc/libvlc_events.h>
  33
  34 #include <vlc_demux.h>
  35 #include <vlc_input.h>
  36 #include <vlc_vout.h>
  37 #include <vlc_keys.h>
  38
  39 #include "libvlc.h"
  40
  41 #include "libvlc_internal.h"
  42 #include "media_internal.h" // libvlc_media_set_state()
  43 #include "media_player_internal.h"
  44
  45 /*
  46  * mapping of libvlc_navigate_mode_t to vlc_key_t
  47  */
  48 static const vlc_key_t libvlc_navigate_to_action[] =
  49   {
  50     ACTIONID_NAV_ACTIVATE,
  51     ACTIONID_NAV_UP,
  52     ACTIONID_NAV_DOWN,
  53     ACTIONID_NAV_LEFT,
  54     ACTIONID_NAV_RIGHT
  55   };
  56
  57 static const uint32_t libvlc_navigate_to_action_size =                  \
  58   sizeof( libvlc_navigate_to_action ) / sizeof( libvlc_navigate_to_action[0] );
  59
  60
  61 static int
  62 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
  63                         vlc_value_t oldval, vlc_value_t newval,
  64                         void * p_userdata );
  65 static int
  66 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
  67                         vlc_value_t oldval, vlc_value_t newval,
  68                         void * p_userdata );
  69 static int
  70 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
  71                      vlc_value_t oldval, vlc_value_t newval,
  72                      void * p_userdata );
  73
  74 static int
  75 snapshot_was_taken( vlc_object_t *p_this, char const *psz_cmd,
  76                     vlc_value_t oldval, vlc_value_t newval, void *p_data );
  77
  78 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi );
  79
  80 /*
  81  * Shortcuts
  82  */
  83
  84 #define register_event(a, b) __register_event(a, libvlc_MediaPlayer ## b)
  85 static inline void __register_event(libvlc_media_player_t *mp, libvlc_event_type_t type)
  86 {
  87     libvlc_event_manager_register_event_type(mp->p_event_manager, type);
  88 }
  89
  90 /*
  91  * The input lock protects the input and input resource pointer.
  92  * It MUST NOT be used from callbacks.
  93  *
  94  * The object lock protects the reset, namely the media and the player state.
  95  * It can, and usually needs to be taken from callbacks.
  96  * The object lock can be acquired under the input lock... and consequently
  97  * the opposite order is STRICTLY PROHIBITED.
  98  */
  99 static inline void lock(libvlc_media_player_t *mp)
 100 {
 101     vlc_mutex_lock(&mp->object_lock);
 102 }
 103
 104 static inline void unlock(libvlc_media_player_t *mp)
 105 {
 106     vlc_mutex_unlock(&mp->object_lock);
 107 }
 108
 109 static inline void lock_input(libvlc_media_player_t *mp)
 110 {
 111     vlc_mutex_lock(&mp->input.lock);
 112 }
 113
 114 static inline void unlock_input(libvlc_media_player_t *mp)
 115 {
 116     vlc_mutex_unlock(&mp->input.lock);
 117 }
 118
 119 /*
 120  * Release the associated input thread.
 121  *
 122  * Object lock is NOT held.
 123  * Input lock is held or instance is being destroyed.
 124  */
 125 static void release_input_thread( libvlc_media_player_t *p_mi, bool b_input_abort )
 126 {
 127     assert( p_mi );
 128
 129     input_thread_t *p_input_thread = p_mi->input.p_thread;
 130     if( !p_input_thread )
 131         return;
 132
 133     var_DelCallback( p_input_thread, "can-seek",
 134                      input_seekable_changed, p_mi );
 135     var_DelCallback( p_input_thread, "can-pause",
 136                     input_pausable_changed, p_mi );
 137     var_DelCallback( p_input_thread, "intf-event",
 138                      input_event_changed, p_mi );
 139
 140     /* We owned this one */
 141     input_Stop( p_input_thread, b_input_abort );
 142
 143     vlc_thread_join( p_input_thread );
 144
 145     assert( p_input_thread->b_dead );
 146
 147     p_mi->input.p_thread = NULL;
 148     vlc_object_release( p_input_thread );
 149 }
 150
 151 /*
 152  * Retrieve the input thread. Be sure to release the object
 153  * once you are done with it. (libvlc Internal)
 154  */
 155 input_thread_t *libvlc_get_input_thread( libvlc_media_player_t *p_mi )
 156 {
 157     input_thread_t *p_input_thread;
 158
 159     assert( p_mi );
 160
 161     lock_input(p_mi);
 162     p_input_thread = p_mi->input.p_thread;
 163     if( p_input_thread )
 164         vlc_object_hold( p_input_thread );
 165     else
 166         libvlc_printerr( "No active input" );
 167     unlock_input(p_mi);
 168
 169     return p_input_thread;
 170 }
 171
 172 /*
 173  * Set the internal state of the media_player. (media player Internal)
 174  *
 175  * Function will lock the media_player.
 176  */
 177 static void set_state( libvlc_media_player_t *p_mi, libvlc_state_t state,
 178     bool b_locked )
 179 {
 180     if(!b_locked)
 181         lock(p_mi);
 182     p_mi->state = state;
 183
 184     libvlc_media_t *media = p_mi->p_md;
 185     if (media)
 186         libvlc_media_retain(media);
 187
 188     if(!b_locked)
 189         unlock(p_mi);
 190
 191     if (media)
 192     {
 193         // Also set the state of the corresponding media
 194         // This is strictly for convenience.
 195         libvlc_media_set_state(media, state);
 196
 197         libvlc_media_release(media);
 198     }
 199 }
 200
 201 static int
 202 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
 203                         vlc_value_t oldval, vlc_value_t newval,
 204                         void * p_userdata )
 205 {
 206     VLC_UNUSED(oldval);
 207     VLC_UNUSED(p_this);
 208     VLC_UNUSED(psz_cmd);
 209     libvlc_media_player_t * p_mi = p_userdata;
 210     libvlc_event_t event;
 211
 212     event.type = libvlc_MediaPlayerSeekableChanged;
 213     event.u.media_player_seekable_changed.new_seekable = newval.b_bool;
 214
 215     libvlc_event_send( p_mi->p_event_manager, &event );
 216     return VLC_SUCCESS;
 217 }
 218
 219 static int
 220 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
 221                         vlc_value_t oldval, vlc_value_t newval,
 222                         void * p_userdata )
 223 {
 224     VLC_UNUSED(oldval);
 225     VLC_UNUSED(p_this);
 226     VLC_UNUSED(psz_cmd);
 227     libvlc_media_player_t * p_mi = p_userdata;
 228     libvlc_event_t event;
 229
 230     event.type = libvlc_MediaPlayerPausableChanged;
 231     event.u.media_player_pausable_changed.new_pausable = newval.b_bool;
 232
 233     libvlc_event_send( p_mi->p_event_manager, &event );
 234     return VLC_SUCCESS;
 235 }
 236
 237 static int
 238 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
 239                      vlc_value_t oldval, vlc_value_t newval,
 240                      void * p_userdata )
 241 {
 242     VLC_UNUSED(oldval);
 243     input_thread_t * p_input = (input_thread_t *)p_this;
 244     libvlc_media_player_t * p_mi = p_userdata;
 245     libvlc_event_t event;
 246
 247     assert( !strcmp( psz_cmd, "intf-event" ) );
 248
 249     if( newval.i_int == INPUT_EVENT_STATE )
 250     {
 251         libvlc_state_t libvlc_state;
 252
 253         switch ( var_GetInteger( p_input, "state" ) )
 254         {
 255             case INIT_S:
 256                 libvlc_state = libvlc_NothingSpecial;
 257                 event.type = libvlc_MediaPlayerNothingSpecial;
 258                 break;
 259             case OPENING_S:
 260                 libvlc_state = libvlc_Opening;
 261                 event.type = libvlc_MediaPlayerOpening;
 262                 break;
 263             case PLAYING_S:
 264                 libvlc_state = libvlc_Playing;
 265                 event.type = libvlc_MediaPlayerPlaying;
 266                 break;
 267             case PAUSE_S:
 268                 libvlc_state = libvlc_Paused;
 269                 event.type = libvlc_MediaPlayerPaused;
 270                 break;
 271             case END_S:
 272                 libvlc_state = libvlc_Ended;
 273                 event.type = libvlc_MediaPlayerEndReached;
 274                 break;
 275             case ERROR_S:
 276                 libvlc_state = libvlc_Error;
 277                 event.type = libvlc_MediaPlayerEncounteredError;
 278                 break;
 279
 280             default:
 281                 return VLC_SUCCESS;
 282         }
 283
 284         set_state( p_mi, libvlc_state, false );
 285         libvlc_event_send( p_mi->p_event_manager, &event );
 286     }
 287     else if( newval.i_int == INPUT_EVENT_ABORT )
 288     {
 289         libvlc_state_t libvlc_state = libvlc_Stopped;
 290         event.type = libvlc_MediaPlayerStopped;
 291
 292         set_state( p_mi, libvlc_state, false );
 293         libvlc_event_send( p_mi->p_event_manager, &event );
 294     }
 295     else if( newval.i_int == INPUT_EVENT_POSITION )
 296     {
 297         if( var_GetInteger( p_input, "state" ) != PLAYING_S )
 298             return VLC_SUCCESS; /* Don't send the position while stopped */
 299
 300         /* */
 301         event.type = libvlc_MediaPlayerPositionChanged;
 302         event.u.media_player_position_changed.new_position =
 303                                           var_GetFloat( p_input, "position" );
 304         libvlc_event_send( p_mi->p_event_manager, &event );
 305
 306         /* */
 307         event.type = libvlc_MediaPlayerTimeChanged;
 308         event.u.media_player_time_changed.new_time =
 309            from_mtime(var_GetTime( p_input, "time" ));
 310         libvlc_event_send( p_mi->p_event_manager, &event );
 311     }
 312     else if( newval.i_int == INPUT_EVENT_LENGTH )
 313     {
 314         event.type = libvlc_MediaPlayerLengthChanged;
 315         event.u.media_player_length_changed.new_length =
 316            from_mtime(var_GetTime( p_input, "length" ));
 317         libvlc_event_send( p_mi->p_event_manager, &event );
 318     }
 319     else if( newval.i_int == INPUT_EVENT_CACHE )
 320     {
 321         event.type = libvlc_MediaPlayerBuffering;
 322         event.u.media_player_buffering.new_cache = (int)(100 *
 323             var_GetFloat( p_input, "cache" ));
 324         libvlc_event_send( p_mi->p_event_manager, &event );
 325     }
 326
 327     return VLC_SUCCESS;
 328 }
 329
 330 /**************************************************************************
 331  * Snapshot Taken Event.
 332  *
 333  * FIXME: This snapshot API interface makes no sense in media_player.
 334  *************************************************************************/
 335 static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd,
 336                               vlc_value_t oldval, vlc_value_t newval, void *p_data )
 337 {
 338     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_this);
 339
 340     libvlc_media_player_t *mp = p_data;
 341     libvlc_event_t event;
 342     event.type = libvlc_MediaPlayerSnapshotTaken;
 343     event.u.media_player_snapshot_taken.psz_filename = newval.psz_string;
 344     libvlc_event_send(mp->p_event_manager, &event);
 345
 346     return VLC_SUCCESS;
 347 }
 348
 349 static input_thread_t *find_input (vlc_object_t *obj)
 350 {
 351     libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;
 352
 353     return libvlc_get_input_thread (mp);
 354 }
 355
 356 /* */
 357 static void libvlc_media_player_destroy( libvlc_media_player_t * );
 358
 359
 360 /**************************************************************************
 361  * Create a Media Instance object.
 362  *
 363  * Refcount strategy:
 364  * - All items created by _new start with a refcount set to 1.
 365  * - Accessor _release decrease the refcount by 1, if after that
 366  *   operation the refcount is 0, the object is destroyed.
 367  * - Accessor _retain increase the refcount by 1 (XXX: to implement)
 368  *
 369  * Object locking strategy:
 370  * - No lock held while in constructor.
 371  * - When accessing any member variable this lock is held. (XXX who locks?)
 372  * - When attempting to destroy the object the lock is also held.
 373  **************************************************************************/
 374 libvlc_media_player_t *
 375 libvlc_media_player_new( libvlc_instance_t *instance )
 376 {
 377     libvlc_media_player_t * mp;
 378
 379     assert(instance);
 380
 381     mp = vlc_object_create (instance->p_libvlc_int, sizeof(*mp));
 382     if (unlikely(mp == NULL))
 383     {
 384         libvlc_printerr("Not enough memory");
 385         return NULL;
 386     }
 387     vlc_object_attach (mp, mp->p_libvlc);
 388
 389     /* Input */
 390     var_Create (mp, "rate", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT);
 391
 392     /* Video */
 393     var_Create (mp, "vout", VLC_VAR_STRING|VLC_VAR_DOINHERIT);
 394     var_Create (mp, "window", VLC_VAR_STRING);
 395     var_Create (mp, "vmem-lock", VLC_VAR_ADDRESS);
 396     var_Create (mp, "vmem-unlock", VLC_VAR_ADDRESS);
 397     var_Create (mp, "vmem-display", VLC_VAR_ADDRESS);
 398     var_Create (mp, "vmem-data", VLC_VAR_ADDRESS);
 399     var_Create (mp, "vmem-setup", VLC_VAR_ADDRESS);
 400     var_Create (mp, "vmem-cleanup", VLC_VAR_ADDRESS);
 401     var_Create (mp, "vmem-chroma", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 402     var_Create (mp, "vmem-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 403     var_Create (mp, "vmem-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 404     var_Create (mp, "vmem-pitch", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 405     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 406 #ifdef WIN32
 407     var_Create (mp, "drawable-hwnd", VLC_VAR_ADDRESS);
 408 #endif
 409 #ifdef __APPLE__
 410     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 411     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 412 #endif
 413
 414     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 415     var_SetBool (mp, "keyboard-events", true);
 416     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 417     var_SetBool (mp, "mouse-events", true);
 418
 419     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 420     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 421     var_SetBool (mp, "autoscale", true);
 422     var_Create (mp, "scale", VLC_VAR_FLOAT);
 423     var_SetFloat (mp, "scale", 1.);
 424     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 425     var_Create (mp, "crop", VLC_VAR_STRING);
 426     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 427     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 428
 429     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 430
 431     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 432     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 433     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 434     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 435     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 436     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 437     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 438     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 439     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 440
 441     var_Create (mp, "logo-file", VLC_VAR_STRING);
 442     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 443     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 444     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 445     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 446     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 447     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 448
 449     var_Create (mp, "contrast", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 450     var_Create (mp, "brightness", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 451     var_Create (mp, "hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 452     var_Create (mp, "saturation", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 453     var_Create (mp, "gamma", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 454
 455      /* Audio */
 456     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 457     var_Create (mp, "volume-muted", VLC_VAR_BOOL);
 458     var_Create (mp, "saved-volume", VLC_VAR_INTEGER);
 459     var_Create (mp, "volume-change", VLC_VAR_VOID);
 460     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 461     var_SetAddress (mp, "find-input-callback", find_input);
 462
 463     mp->p_md = NULL;
 464     mp->state = libvlc_NothingSpecial;
 465     mp->p_libvlc_instance = instance;
 466     mp->input.p_thread = NULL;
 467     mp->input.p_resource = NULL;
 468     vlc_mutex_init (&mp->input.lock);
 469     mp->i_refcount = 1;
 470     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 471     if (unlikely(mp->p_event_manager == NULL))
 472     {
 473         vlc_object_release(mp);
 474         return NULL;
 475     }
 476     vlc_mutex_init(&mp->object_lock);
 477
 478     register_event(mp, NothingSpecial);
 479     register_event(mp, Opening);
 480     register_event(mp, Buffering);
 481     register_event(mp, Playing);
 482     register_event(mp, Paused);
 483     register_event(mp, Stopped);
 484     register_event(mp, Forward);
 485     register_event(mp, Backward);
 486     register_event(mp, EndReached);
 487     register_event(mp, EncounteredError);
 488     register_event(mp, SeekableChanged);
 489
 490     register_event(mp, PositionChanged);
 491     register_event(mp, TimeChanged);
 492     register_event(mp, LengthChanged);
 493     register_event(mp, TitleChanged);
 494     register_event(mp, PausableChanged);
 495
 496     /* Snapshot initialization */
 497     register_event(mp, SnapshotTaken);
 498
 499     register_event(mp, MediaChanged);
 500
 501     /* Attach a var callback to the global object to provide the glue between
 502      * vout_thread that generates the event and media_player that re-emits it
 503      * with its own event manager
 504      *
 505      * FIXME: It's unclear why we want to put this in public API, and why we
 506      * want to expose it in such a limiting and ugly way.
 507      */
 508     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 509
 510     libvlc_retain(instance);
 511     return mp;
 512 }
 513
 514 /**************************************************************************
 515  * Create a Media Instance object with a media descriptor.
 516  **************************************************************************/
 517 libvlc_media_player_t *
 518 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 519 {
 520     libvlc_media_player_t * p_mi;
 521
 522     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 523     if( !p_mi )
 524         return NULL;
 525
 526     libvlc_media_retain( p_md );
 527     p_mi->p_md = p_md;
 528
 529     return p_mi;
 530 }
 531
 532 /**************************************************************************
 533  * Destroy a Media Instance object (libvlc internal)
 534  *
 535  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 536  **************************************************************************/
 537 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 538 {
 539     assert( p_mi );
 540
 541     /* Detach Callback from the main libvlc object */
 542     var_DelCallback( p_mi->p_libvlc,
 543                      "snapshot-file", snapshot_was_taken, p_mi );
 544
 545     /* No need for lock_input() because no other threads knows us anymore */
 546     if( p_mi->input.p_thread )
 547         release_input_thread(p_mi, true);
 548     if( p_mi->input.p_resource )
 549     {
 550         input_resource_Terminate( p_mi->input.p_resource );
 551         input_resource_Release( p_mi->input.p_resource );
 552         p_mi->input.p_resource = NULL;
 553     }
 554     vlc_mutex_destroy( &p_mi->input.lock );
 555
 556     libvlc_event_manager_release( p_mi->p_event_manager );
 557     libvlc_media_release( p_mi->p_md );
 558     vlc_mutex_destroy( &p_mi->object_lock );
 559
 560     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 561     vlc_object_release( p_mi );
 562     libvlc_release(instance);
 563 }
 564
 565 /**************************************************************************
 566  * Release a Media Instance object.
 567  *
 568  * Function does the locking.
 569  **************************************************************************/
 570 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 571 {
 572     bool destroy;
 573
 574     assert( p_mi );
 575     lock(p_mi);
 576     destroy = !--p_mi->i_refcount;
 577     unlock(p_mi);
 578
 579     if( destroy )
 580         libvlc_media_player_destroy( p_mi );
 581 }
 582
 583 /**************************************************************************
 584  * Retain a Media Instance object.
 585  *
 586  * Caller must hold the lock.
 587  **************************************************************************/
 588 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 589 {
 590     assert( p_mi );
 591
 592     lock(p_mi);
 593     p_mi->i_refcount++;
 594     unlock(p_mi);
 595 }
 596
 597 /**************************************************************************
 598  * Set the Media descriptor associated with the instance.
 599  *
 600  * Enter without lock -- function will lock the object.
 601  **************************************************************************/
 602 void libvlc_media_player_set_media(
 603                             libvlc_media_player_t *p_mi,
 604                             libvlc_media_t *p_md )
 605 {
 606     lock_input(p_mi);
 607
 608     /* FIXME I am not sure if it is a user request or on die(eof/error)
 609      * request here */
 610     release_input_thread( p_mi,
 611                           p_mi->input.p_thread &&
 612                           !p_mi->input.p_thread->b_eof &&
 613                           !p_mi->input.p_thread->b_error );
 614
 615     lock( p_mi );
 616     set_state( p_mi, libvlc_NothingSpecial, true );
 617     unlock_input( p_mi );
 618
 619     libvlc_media_release( p_mi->p_md );
 620
 621     if( !p_md )
 622     {
 623         p_mi->p_md = NULL;
 624         unlock(p_mi);
 625         return; /* It is ok to pass a NULL md */
 626     }
 627
 628     libvlc_media_retain( p_md );
 629     p_mi->p_md = p_md;
 630
 631     /* The policy here is to ignore that we were created using a different
 632      * libvlc_instance, because we don't really care */
 633     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 634
 635     unlock(p_mi);
 636
 637     /* Send an event for the newly available media */
 638     libvlc_event_t event;
 639     event.type = libvlc_MediaPlayerMediaChanged;
 640     event.u.media_player_media_changed.new_media = p_md;
 641     libvlc_event_send( p_mi->p_event_manager, &event );
 642
 643 }
 644
 645 /**************************************************************************
 646  * Get the Media descriptor associated with the instance.
 647  **************************************************************************/
 648 libvlc_media_t *
 649 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 650 {
 651     libvlc_media_t *p_m;
 652
 653     lock(p_mi);
 654     p_m = p_mi->p_md;
 655     if( p_m )
 656         libvlc_media_retain( p_mi->p_md );
 657     unlock(p_mi);
 658     return p_mi->p_md;
 659 }
 660
 661 /**************************************************************************
 662  * Get the event Manager.
 663  **************************************************************************/
 664 libvlc_event_manager_t *
 665 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 666 {
 667     return p_mi->p_event_manager;
 668 }
 669
 670 /**************************************************************************
 671  * Tell media player to start playing.
 672  **************************************************************************/
 673 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 674 {
 675     lock_input( p_mi );
 676
 677     input_thread_t *p_input_thread = p_mi->input.p_thread;
 678     if( p_input_thread )
 679     {
 680         /* A thread already exists, send it a play message */
 681         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 682         unlock_input( p_mi );
 683         return 0;
 684     }
 685
 686     /* Ignore previous exception */
 687     lock(p_mi);
 688
 689     if( !p_mi->p_md )
 690     {
 691         unlock(p_mi);
 692         unlock_input( p_mi );
 693         libvlc_printerr( "No associated media descriptor" );
 694         return -1;
 695     }
 696
 697     if( !p_mi->input.p_resource )
 698         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 699     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 700                                    p_mi->input.p_resource );
 701     unlock(p_mi);
 702     if( !p_input_thread )
 703     {
 704         unlock_input(p_mi);
 705         libvlc_printerr( "Not enough memory" );
 706         return -1;
 707     }
 708
 709     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 710     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 711     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 712
 713     if( input_Start( p_input_thread ) )
 714     {
 715         unlock_input(p_mi);
 716         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 717         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 718         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 719         vlc_object_release( p_input_thread );
 720         libvlc_printerr( "Input initialization failure" );
 721         return -1;
 722     }
 723     p_mi->input.p_thread = p_input_thread;
 724     unlock_input(p_mi);
 725     return 0;
 726 }
 727
 728 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 729 {
 730     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 731     if( !p_input_thread )
 732         return;
 733
 734     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 735     if( state == libvlc_Playing || state == libvlc_Buffering )
 736     {
 737         if( paused )
 738         {
 739             if( libvlc_media_player_can_pause( p_mi ) )
 740                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 741             else
 742                 libvlc_media_player_stop( p_mi );
 743         }
 744     }
 745     else
 746     {
 747         if( !paused )
 748             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 749     }
 750
 751     vlc_object_release( p_input_thread );
 752 }
 753
 754 /**************************************************************************
 755  * Toggle pause.
 756  **************************************************************************/
 757 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 758 {
 759     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 760     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 761
 762     libvlc_media_player_set_pause( p_mi, playing );
 763 }
 764
 765 /**************************************************************************
 766  * Tells whether the media player is currently playing.
 767  *
 768  * Enter with lock held.
 769  **************************************************************************/
 770 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 771 {
 772     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 773     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 774 }
 775
 776 /**************************************************************************
 777  * Stop playing.
 778  **************************************************************************/
 779 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 780 {
 781     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 782
 783     lock_input(p_mi);
 784     release_input_thread( p_mi, true ); /* This will stop the input thread */
 785
 786     /* Force to go to stopped state, in case we were in Ended, or Error
 787      * state. */
 788     if( state != libvlc_Stopped )
 789     {
 790         set_state( p_mi, libvlc_Stopped, false );
 791
 792         /* Construct and send the event */
 793         libvlc_event_t event;
 794         event.type = libvlc_MediaPlayerStopped;
 795         libvlc_event_send( p_mi->p_event_manager, &event );
 796     }
 797
 798     if( p_mi->input.p_resource != NULL )
 799         input_resource_Terminate( p_mi->input.p_resource );
 800     unlock_input(p_mi);
 801 }
 802
 803
 804 void libvlc_video_set_callbacks( libvlc_media_player_t *mp,
 805     void *(*lock_cb) (void *, void **),
 806     void (*unlock_cb) (void *, void *, void *const *),
 807     void (*display_cb) (void *, void *),
 808     void *opaque )
 809 {
 810     var_SetAddress( mp, "vmem-lock", lock_cb );
 811     var_SetAddress( mp, "vmem-unlock", unlock_cb );
 812     var_SetAddress( mp, "vmem-display", display_cb );
 813     var_SetAddress( mp, "vmem-data", opaque );
 814     var_SetString( mp, "vout", "vmem" );
 815 }
 816
 817 void libvlc_video_set_format_callbacks( libvlc_media_player_t *mp,
 818                                         libvlc_video_format_cb setup,
 819                                         libvlc_video_cleanup_cb cleanup )
 820 {
 821     var_SetAddress( mp, "vmem-setup", setup );
 822     var_SetAddress( mp, "vmem-cleanup", cleanup );
 823 }
 824
 825 void libvlc_video_set_format( libvlc_media_player_t *mp, const char *chroma,
 826                               unsigned width, unsigned height, unsigned pitch )
 827 {
 828     var_SetString( mp, "vmem-chroma", chroma );
 829     var_SetInteger( mp, "vmem-width", width );
 830     var_SetInteger( mp, "vmem-height", height );
 831     var_SetInteger( mp, "vmem-pitch", pitch );
 832 }
 833
 834 /**************************************************************************
 835  * set_nsobject
 836  **************************************************************************/
 837 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 838                                         void * drawable )
 839 {
 840     assert (p_mi != NULL);
 841 #ifdef __APPLE__
 842     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 843 #else
 844     (void) p_mi; (void)drawable;
 845 #endif
 846 }
 847
 848 /**************************************************************************
 849  * get_nsobject
 850  **************************************************************************/
 851 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 852 {
 853     assert (p_mi != NULL);
 854 #ifdef __APPLE__
 855     return var_GetAddress (p_mi, "drawable-nsobject");
 856 #else
 857     return NULL;
 858 #endif
 859 }
 860
 861 /**************************************************************************
 862  * set_agl
 863  **************************************************************************/
 864 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 865                                   uint32_t drawable )
 866 {
 867 #ifdef __APPLE__
 868     var_SetInteger (p_mi, "drawable-agl", drawable);
 869 #else
 870     (void) p_mi; (void)drawable;
 871 #endif
 872 }
 873
 874 /**************************************************************************
 875  * get_agl
 876  **************************************************************************/
 877 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 878 {
 879     assert (p_mi != NULL);
 880 #ifdef __APPLE__
 881     return var_GetInteger (p_mi, "drawable-agl");
 882 #else
 883     return 0;
 884 #endif
 885 }
 886
 887 /**************************************************************************
 888  * set_xwindow
 889  **************************************************************************/
 890 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 891                                       uint32_t drawable )
 892 {
 893     assert (p_mi != NULL);
 894
 895     var_SetString (p_mi, "vout", drawable ? "xid" : "any");
 896     var_SetString (p_mi, "window", drawable ? "embed-xid,any" : "any");
 897     var_SetInteger (p_mi, "drawable-xid", drawable);
 898 }
 899
 900 /**************************************************************************
 901  * get_xwindow
 902  **************************************************************************/
 903 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 904 {
 905     return var_GetInteger (p_mi, "drawable-xid");
 906 }
 907
 908 /**************************************************************************
 909  * set_hwnd
 910  **************************************************************************/
 911 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 912                                    void *drawable )
 913 {
 914     assert (p_mi != NULL);
 915 #ifdef WIN32
 916     var_SetString (p_mi, "window",
 917                    (drawable != NULL) ? "embed-hwnd,any" : "");
 918     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 919 #else
 920     (void) p_mi; (void) drawable;
 921 #endif
 922 }
 923
 924 /**************************************************************************
 925  * get_hwnd
 926  **************************************************************************/
 927 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 928 {
 929     assert (p_mi != NULL);
 930 #ifdef WIN32
 931     return var_GetAddress (p_mi, "drawable-hwnd");
 932 #else
 933     return NULL;
 934 #endif
 935 }
 936
 937 /**************************************************************************
 938  * Getters for stream information
 939  **************************************************************************/
 940 libvlc_time_t libvlc_media_player_get_length(
 941                              libvlc_media_player_t *p_mi )
 942 {
 943     input_thread_t *p_input_thread;
 944     libvlc_time_t i_time;
 945
 946     p_input_thread = libvlc_get_input_thread ( p_mi );
 947     if( !p_input_thread )
 948         return -1;
 949
 950     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 951     vlc_object_release( p_input_thread );
 952
 953     return i_time;
 954 }
 955
 956 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 957 {
 958     input_thread_t *p_input_thread;
 959     libvlc_time_t i_time;
 960
 961     p_input_thread = libvlc_get_input_thread ( p_mi );
 962     if( !p_input_thread )
 963         return -1;
 964
 965     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 966     vlc_object_release( p_input_thread );
 967     return i_time;
 968 }
 969
 970 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 971                                    libvlc_time_t i_time )
 972 {
 973     input_thread_t *p_input_thread;
 974
 975     p_input_thread = libvlc_get_input_thread ( p_mi );
 976     if( !p_input_thread )
 977         return;
 978
 979     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 980     vlc_object_release( p_input_thread );
 981 }
 982
 983 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 984                                        float position )
 985 {
 986     input_thread_t *p_input_thread;
 987
 988     p_input_thread = libvlc_get_input_thread ( p_mi );
 989     if( !p_input_thread )
 990         return;
 991
 992     var_SetFloat( p_input_thread, "position", position );
 993     vlc_object_release( p_input_thread );
 994 }
 995
 996 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 997 {
 998     input_thread_t *p_input_thread;
 999     float f_position;
1000
1001     p_input_thread = libvlc_get_input_thread ( p_mi );
1002     if( !p_input_thread )
1003         return -1.0;
1004
1005     f_position = var_GetFloat( p_input_thread, "position" );
1006     vlc_object_release( p_input_thread );
1007
1008     return f_position;
1009 }
1010
1011 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
1012                                       int chapter )
1013 {
1014     input_thread_t *p_input_thread;
1015
1016     p_input_thread = libvlc_get_input_thread ( p_mi );
1017     if( !p_input_thread )
1018         return;
1019
1020     var_SetInteger( p_input_thread, "chapter", chapter );
1021     vlc_object_release( p_input_thread );
1022 }
1023
1024 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
1025 {
1026     input_thread_t *p_input_thread;
1027     int i_chapter;
1028
1029     p_input_thread = libvlc_get_input_thread ( p_mi );
1030     if( !p_input_thread )
1031         return -1;
1032
1033     i_chapter = var_GetInteger( p_input_thread, "chapter" );
1034     vlc_object_release( p_input_thread );
1035
1036     return i_chapter;
1037 }
1038
1039 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
1040 {
1041     input_thread_t *p_input_thread;
1042     vlc_value_t val;
1043
1044     p_input_thread = libvlc_get_input_thread ( p_mi );
1045     if( !p_input_thread )
1046         return -1;
1047
1048     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
1049     vlc_object_release( p_input_thread );
1050
1051     return val.i_int;
1052 }
1053
1054 int libvlc_media_player_get_chapter_count_for_title(
1055                                  libvlc_media_player_t *p_mi,
1056                                  int i_title )
1057 {
1058     input_thread_t *p_input_thread;
1059     vlc_value_t val;
1060
1061     p_input_thread = libvlc_get_input_thread ( p_mi );
1062     if( !p_input_thread )
1063         return -1;
1064
1065     char *psz_name;
1066     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
1067     {
1068         vlc_object_release( p_input_thread );
1069         return -1;
1070     }
1071     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1072     vlc_object_release( p_input_thread );
1073     free( psz_name );
1074
1075     return val.i_int;
1076 }
1077
1078 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1079                                     int i_title )
1080 {
1081     input_thread_t *p_input_thread;
1082
1083     p_input_thread = libvlc_get_input_thread ( p_mi );
1084     if( !p_input_thread )
1085         return;
1086
1087     var_SetInteger( p_input_thread, "title", i_title );
1088     vlc_object_release( p_input_thread );
1089
1090     //send event
1091     libvlc_event_t event;
1092     event.type = libvlc_MediaPlayerTitleChanged;
1093     event.u.media_player_title_changed.new_title = i_title;
1094     libvlc_event_send( p_mi->p_event_manager, &event );
1095 }
1096
1097 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1098 {
1099     input_thread_t *p_input_thread;
1100     int i_title;
1101
1102     p_input_thread = libvlc_get_input_thread ( p_mi );
1103     if( !p_input_thread )
1104         return -1;
1105
1106     i_title = var_GetInteger( p_input_thread, "title" );
1107     vlc_object_release( p_input_thread );
1108
1109     return i_title;
1110 }
1111
1112 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1113 {
1114     input_thread_t *p_input_thread;
1115     vlc_value_t val;
1116
1117     p_input_thread = libvlc_get_input_thread ( p_mi );
1118     if( !p_input_thread )
1119         return -1;
1120
1121     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1122     vlc_object_release( p_input_thread );
1123
1124     return val.i_int;
1125 }
1126
1127 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1128 {
1129     input_thread_t *p_input_thread;
1130
1131     p_input_thread = libvlc_get_input_thread ( p_mi );
1132     if( !p_input_thread )
1133         return;
1134
1135     int i_type = var_Type( p_input_thread, "next-chapter" );
1136     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1137                             "next-chapter":"next-title" );
1138
1139     vlc_object_release( p_input_thread );
1140 }
1141
1142 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1143 {
1144     input_thread_t *p_input_thread;
1145
1146     p_input_thread = libvlc_get_input_thread ( p_mi );
1147     if( !p_input_thread )
1148         return;
1149
1150     int i_type = var_Type( p_input_thread, "next-chapter" );
1151     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1152                             "prev-chapter":"prev-title" );
1153
1154     vlc_object_release( p_input_thread );
1155 }
1156
1157 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1158 {
1159     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1160     double f_fps = 0.0;
1161
1162     if( p_input_thread )
1163     {
1164         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1165             f_fps = 0.0;
1166         vlc_object_release( p_input_thread );
1167     }
1168     return f_fps;
1169 }
1170
1171 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1172 {
1173     bool b_will_play;
1174     input_thread_t *p_input_thread =
1175                             libvlc_get_input_thread ( p_mi );
1176     if ( !p_input_thread )
1177         return false;
1178
1179     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1180     vlc_object_release( p_input_thread );
1181
1182     return b_will_play;
1183 }
1184
1185 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1186 {
1187     if (rate < 0.)
1188     {
1189         libvlc_printerr ("Playing backward not supported");
1190         return -1;
1191     }
1192
1193     var_SetFloat (p_mi, "rate", rate);
1194
1195     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1196     if( !p_input_thread )
1197         return 0;
1198     var_SetFloat( p_input_thread, "rate", rate );
1199     vlc_object_release( p_input_thread );
1200     return 0;
1201 }
1202
1203 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1204 {
1205     return var_GetFloat (p_mi, "rate");
1206 }
1207
1208 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1209 {
1210     lock(p_mi);
1211     libvlc_state_t state = p_mi->state;
1212     unlock(p_mi);
1213     return state;
1214 }
1215
1216 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1217 {
1218     input_thread_t *p_input_thread;
1219     bool b_seekable;
1220
1221     p_input_thread = libvlc_get_input_thread ( p_mi );
1222     if ( !p_input_thread )
1223         return false;
1224     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1225     vlc_object_release( p_input_thread );
1226
1227     return b_seekable;
1228 }
1229
1230 void libvlc_media_player_navigate( libvlc_media_player_t* p_mi,
1231                                    unsigned navigate )
1232 {
1233     input_thread_t *p_input_thread;
1234
1235     if ( navigate > libvlc_navigate_to_action_size)
1236       return;
1237
1238     p_input_thread = libvlc_get_input_thread ( p_mi );
1239     if ( !p_input_thread )
1240       return;
1241
1242     var_SetInteger( p_mi->p_libvlc_instance->p_libvlc_int,
1243                     "key-action", libvlc_navigate_to_action[navigate] );
1244
1245     vlc_object_release( p_input_thread );
1246 }
1247
1248 /* internal function, used by audio, video */
1249 libvlc_track_description_t *
1250         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1251                                       const char *psz_variable )
1252 {
1253     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1254     libvlc_track_description_t *p_track_description = NULL,
1255                                *p_actual, *p_previous;
1256
1257     if( !p_input )
1258         return NULL;
1259
1260     vlc_value_t val_list, text_list;
1261     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1262
1263     /* no tracks */
1264     if( val_list.p_list->i_count <= 0 )
1265         goto end;
1266
1267     p_track_description = ( libvlc_track_description_t * )
1268         malloc( sizeof( libvlc_track_description_t ) );
1269     if ( !p_track_description )
1270     {
1271         libvlc_printerr( "Not enough memory" );
1272         goto end;
1273     }
1274     p_actual = p_track_description;
1275     p_previous = NULL;
1276     for( int i = 0; i < val_list.p_list->i_count; i++ )
1277     {
1278         if( !p_actual )
1279         {
1280             p_actual = ( libvlc_track_description_t * )
1281                 malloc( sizeof( libvlc_track_description_t ) );
1282             if ( !p_actual )
1283             {
1284                 libvlc_track_description_release( p_track_description );
1285                 libvlc_printerr( "Not enough memory" );
1286                 goto end;
1287             }
1288         }
1289         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1290         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1291         p_actual->p_next = NULL;
1292         if( p_previous )
1293             p_previous->p_next = p_actual;
1294         p_previous = p_actual;
1295         p_actual =  NULL;
1296     }
1297
1298 end:
1299     var_FreeList( &val_list, &text_list );
1300     vlc_object_release( p_input );
1301
1302     return p_track_description;
1303 }
1304
1305 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1306 {
1307     libvlc_track_description_t *p_actual, *p_before;
1308     p_actual = p_td;
1309
1310     while ( p_actual )
1311     {
1312         free( p_actual->psz_name );
1313         p_before = p_actual;
1314         p_actual = p_before->p_next;
1315         free( p_before );
1316     }
1317 }
1318
1319 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1320 {
1321     input_thread_t *p_input_thread;
1322     bool b_can_pause;
1323
1324     p_input_thread = libvlc_get_input_thread ( p_mi );
1325     if ( !p_input_thread )
1326         return false;
1327     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1328     vlc_object_release( p_input_thread );
1329
1330     return b_can_pause;
1331 }
1332
1333 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1334 {
1335     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1336     if( p_input_thread != NULL )
1337     {
1338         var_TriggerCallback( p_input_thread, "frame-next" );
1339         vlc_object_release( p_input_thread );
1340     }
1341 }