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_action_t
  47  */
  48 static const vlc_action_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     p_mi->input.p_thread = NULL;
 133
 134     var_DelCallback( p_input_thread, "can-seek",
 135                      input_seekable_changed, p_mi );
 136     var_DelCallback( p_input_thread, "can-pause",
 137                     input_pausable_changed, p_mi );
 138     var_DelCallback( p_input_thread, "intf-event",
 139                      input_event_changed, p_mi );
 140
 141     /* We owned this one */
 142     input_Stop( p_input_thread, b_input_abort );
 143     input_Close( p_input_thread );
 144 }
 145
 146 /*
 147  * Retrieve the input thread. Be sure to release the object
 148  * once you are done with it. (libvlc Internal)
 149  */
 150 input_thread_t *libvlc_get_input_thread( libvlc_media_player_t *p_mi )
 151 {
 152     input_thread_t *p_input_thread;
 153
 154     assert( p_mi );
 155
 156     lock_input(p_mi);
 157     p_input_thread = p_mi->input.p_thread;
 158     if( p_input_thread )
 159         vlc_object_hold( p_input_thread );
 160     else
 161         libvlc_printerr( "No active input" );
 162     unlock_input(p_mi);
 163
 164     return p_input_thread;
 165 }
 166
 167 /*
 168  * Set the internal state of the media_player. (media player Internal)
 169  *
 170  * Function will lock the media_player.
 171  */
 172 static void set_state( libvlc_media_player_t *p_mi, libvlc_state_t state,
 173     bool b_locked )
 174 {
 175     if(!b_locked)
 176         lock(p_mi);
 177     p_mi->state = state;
 178
 179     libvlc_media_t *media = p_mi->p_md;
 180     if (media)
 181         libvlc_media_retain(media);
 182
 183     if(!b_locked)
 184         unlock(p_mi);
 185
 186     if (media)
 187     {
 188         // Also set the state of the corresponding media
 189         // This is strictly for convenience.
 190         libvlc_media_set_state(media, state);
 191
 192         libvlc_media_release(media);
 193     }
 194 }
 195
 196 static int
 197 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
 198                         vlc_value_t oldval, vlc_value_t newval,
 199                         void * p_userdata )
 200 {
 201     VLC_UNUSED(oldval);
 202     VLC_UNUSED(p_this);
 203     VLC_UNUSED(psz_cmd);
 204     libvlc_media_player_t * p_mi = p_userdata;
 205     libvlc_event_t event;
 206
 207     event.type = libvlc_MediaPlayerSeekableChanged;
 208     event.u.media_player_seekable_changed.new_seekable = newval.b_bool;
 209
 210     libvlc_event_send( p_mi->p_event_manager, &event );
 211     return VLC_SUCCESS;
 212 }
 213
 214 static int
 215 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
 216                         vlc_value_t oldval, vlc_value_t newval,
 217                         void * p_userdata )
 218 {
 219     VLC_UNUSED(oldval);
 220     VLC_UNUSED(p_this);
 221     VLC_UNUSED(psz_cmd);
 222     libvlc_media_player_t * p_mi = p_userdata;
 223     libvlc_event_t event;
 224
 225     event.type = libvlc_MediaPlayerPausableChanged;
 226     event.u.media_player_pausable_changed.new_pausable = newval.b_bool;
 227
 228     libvlc_event_send( p_mi->p_event_manager, &event );
 229     return VLC_SUCCESS;
 230 }
 231
 232 static int
 233 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
 234                      vlc_value_t oldval, vlc_value_t newval,
 235                      void * p_userdata )
 236 {
 237     VLC_UNUSED(oldval);
 238     input_thread_t * p_input = (input_thread_t *)p_this;
 239     libvlc_media_player_t * p_mi = p_userdata;
 240     libvlc_event_t event;
 241
 242     assert( !strcmp( psz_cmd, "intf-event" ) );
 243
 244     if( newval.i_int == INPUT_EVENT_STATE )
 245     {
 246         libvlc_state_t libvlc_state;
 247
 248         switch ( var_GetInteger( p_input, "state" ) )
 249         {
 250             case INIT_S:
 251                 libvlc_state = libvlc_NothingSpecial;
 252                 event.type = libvlc_MediaPlayerNothingSpecial;
 253                 break;
 254             case OPENING_S:
 255                 libvlc_state = libvlc_Opening;
 256                 event.type = libvlc_MediaPlayerOpening;
 257                 break;
 258             case PLAYING_S:
 259                 libvlc_state = libvlc_Playing;
 260                 event.type = libvlc_MediaPlayerPlaying;
 261                 break;
 262             case PAUSE_S:
 263                 libvlc_state = libvlc_Paused;
 264                 event.type = libvlc_MediaPlayerPaused;
 265                 break;
 266             case END_S:
 267                 libvlc_state = libvlc_Ended;
 268                 event.type = libvlc_MediaPlayerEndReached;
 269                 break;
 270             case ERROR_S:
 271                 libvlc_state = libvlc_Error;
 272                 event.type = libvlc_MediaPlayerEncounteredError;
 273                 break;
 274
 275             default:
 276                 return VLC_SUCCESS;
 277         }
 278
 279         set_state( p_mi, libvlc_state, false );
 280         libvlc_event_send( p_mi->p_event_manager, &event );
 281     }
 282     else if( newval.i_int == INPUT_EVENT_ABORT )
 283     {
 284         libvlc_state_t libvlc_state = libvlc_Stopped;
 285         event.type = libvlc_MediaPlayerStopped;
 286
 287         set_state( p_mi, libvlc_state, false );
 288         libvlc_event_send( p_mi->p_event_manager, &event );
 289     }
 290     else if( newval.i_int == INPUT_EVENT_POSITION )
 291     {
 292         if( var_GetInteger( p_input, "state" ) != PLAYING_S )
 293             return VLC_SUCCESS; /* Don't send the position while stopped */
 294
 295         /* */
 296         event.type = libvlc_MediaPlayerPositionChanged;
 297         event.u.media_player_position_changed.new_position =
 298                                           var_GetFloat( p_input, "position" );
 299         libvlc_event_send( p_mi->p_event_manager, &event );
 300
 301         /* */
 302         event.type = libvlc_MediaPlayerTimeChanged;
 303         event.u.media_player_time_changed.new_time =
 304            from_mtime(var_GetTime( p_input, "time" ));
 305         libvlc_event_send( p_mi->p_event_manager, &event );
 306     }
 307     else if( newval.i_int == INPUT_EVENT_LENGTH )
 308     {
 309         event.type = libvlc_MediaPlayerLengthChanged;
 310         event.u.media_player_length_changed.new_length =
 311            from_mtime(var_GetTime( p_input, "length" ));
 312         libvlc_event_send( p_mi->p_event_manager, &event );
 313     }
 314     else if( newval.i_int == INPUT_EVENT_CACHE )
 315     {
 316         event.type = libvlc_MediaPlayerBuffering;
 317         event.u.media_player_buffering.new_cache = (int)(100 *
 318             var_GetFloat( p_input, "cache" ));
 319         libvlc_event_send( p_mi->p_event_manager, &event );
 320     }
 321
 322     return VLC_SUCCESS;
 323 }
 324
 325 /**************************************************************************
 326  * Snapshot Taken Event.
 327  *
 328  * FIXME: This snapshot API interface makes no sense in media_player.
 329  *************************************************************************/
 330 static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd,
 331                               vlc_value_t oldval, vlc_value_t newval, void *p_data )
 332 {
 333     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_this);
 334
 335     libvlc_media_player_t *mp = p_data;
 336     libvlc_event_t event;
 337     event.type = libvlc_MediaPlayerSnapshotTaken;
 338     event.u.media_player_snapshot_taken.psz_filename = newval.psz_string;
 339     libvlc_event_send(mp->p_event_manager, &event);
 340
 341     return VLC_SUCCESS;
 342 }
 343
 344 static input_thread_t *find_input (vlc_object_t *obj)
 345 {
 346     libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;
 347
 348     return libvlc_get_input_thread (mp);
 349 }
 350
 351 /* */
 352 static void libvlc_media_player_destroy( libvlc_media_player_t * );
 353
 354
 355 /**************************************************************************
 356  * Create a Media Instance object.
 357  *
 358  * Refcount strategy:
 359  * - All items created by _new start with a refcount set to 1.
 360  * - Accessor _release decrease the refcount by 1, if after that
 361  *   operation the refcount is 0, the object is destroyed.
 362  * - Accessor _retain increase the refcount by 1 (XXX: to implement)
 363  *
 364  * Object locking strategy:
 365  * - No lock held while in constructor.
 366  * - When accessing any member variable this lock is held. (XXX who locks?)
 367  * - When attempting to destroy the object the lock is also held.
 368  **************************************************************************/
 369 libvlc_media_player_t *
 370 libvlc_media_player_new( libvlc_instance_t *instance )
 371 {
 372     libvlc_media_player_t * mp;
 373
 374     assert(instance);
 375
 376     mp = vlc_object_create (instance->p_libvlc_int, sizeof(*mp));
 377     if (unlikely(mp == NULL))
 378     {
 379         libvlc_printerr("Not enough memory");
 380         return NULL;
 381     }
 382
 383     /* Input */
 384     var_Create (mp, "rate", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT);
 385
 386     /* Video */
 387     var_Create (mp, "vout", VLC_VAR_STRING|VLC_VAR_DOINHERIT);
 388     var_Create (mp, "window", VLC_VAR_STRING);
 389     var_Create (mp, "vmem-lock", VLC_VAR_ADDRESS);
 390     var_Create (mp, "vmem-unlock", VLC_VAR_ADDRESS);
 391     var_Create (mp, "vmem-display", VLC_VAR_ADDRESS);
 392     var_Create (mp, "vmem-data", VLC_VAR_ADDRESS);
 393     var_Create (mp, "vmem-setup", VLC_VAR_ADDRESS);
 394     var_Create (mp, "vmem-cleanup", VLC_VAR_ADDRESS);
 395     var_Create (mp, "vmem-chroma", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 396     var_Create (mp, "vmem-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 397     var_Create (mp, "vmem-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 398     var_Create (mp, "vmem-pitch", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 399     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 400 #ifdef WIN32
 401     var_Create (mp, "drawable-hwnd", VLC_VAR_INTEGER);
 402 #endif
 403 #ifdef __APPLE__
 404     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 405     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 406 #endif
 407
 408     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 409     var_SetBool (mp, "keyboard-events", true);
 410     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 411     var_SetBool (mp, "mouse-events", true);
 412
 413     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 414     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 415     var_SetBool (mp, "autoscale", true);
 416     var_Create (mp, "scale", VLC_VAR_FLOAT);
 417     var_SetFloat (mp, "scale", 1.);
 418     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 419     var_Create (mp, "crop", VLC_VAR_STRING);
 420     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 421     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 422
 423     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 424
 425     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 426     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 427     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 428     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 429     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 430     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 431     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 432     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 433     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 434
 435     var_Create (mp, "logo-file", VLC_VAR_STRING);
 436     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 437     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 438     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 439     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 440     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 441     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 442
 443     var_Create (mp, "contrast", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 444     var_Create (mp, "brightness", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 445     var_Create (mp, "hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 446     var_Create (mp, "saturation", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 447     var_Create (mp, "gamma", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 448
 449      /* Audio */
 450     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 451     var_Create (mp, "mute", VLC_VAR_BOOL);
 452     var_Create (mp, "volume", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 453     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 454     var_SetAddress (mp, "find-input-callback", find_input);
 455     var_Create (mp, "amem-data", VLC_VAR_ADDRESS);
 456     var_Create (mp, "amem-setup", VLC_VAR_ADDRESS);
 457     var_Create (mp, "amem-close", VLC_VAR_ADDRESS);
 458     var_Create (mp, "amem-play", VLC_VAR_ADDRESS);
 459     var_Create (mp, "amem-set-volume", VLC_VAR_ADDRESS);
 460     var_Create (mp, "amem-format", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 461     var_Create (mp, "amem-rate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 462     var_Create (mp, "amem-channels", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 463
 464     mp->p_md = NULL;
 465     mp->state = libvlc_NothingSpecial;
 466     mp->p_libvlc_instance = instance;
 467     mp->input.p_thread = NULL;
 468     mp->input.p_resource = NULL;
 469     vlc_mutex_init (&mp->input.lock);
 470     mp->i_refcount = 1;
 471     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 472     if (unlikely(mp->p_event_manager == NULL))
 473     {
 474         vlc_object_release(mp);
 475         return NULL;
 476     }
 477     vlc_mutex_init(&mp->object_lock);
 478
 479     register_event(mp, NothingSpecial);
 480     register_event(mp, Opening);
 481     register_event(mp, Buffering);
 482     register_event(mp, Playing);
 483     register_event(mp, Paused);
 484     register_event(mp, Stopped);
 485     register_event(mp, Forward);
 486     register_event(mp, Backward);
 487     register_event(mp, EndReached);
 488     register_event(mp, EncounteredError);
 489     register_event(mp, SeekableChanged);
 490
 491     register_event(mp, PositionChanged);
 492     register_event(mp, TimeChanged);
 493     register_event(mp, LengthChanged);
 494     register_event(mp, TitleChanged);
 495     register_event(mp, PausableChanged);
 496
 497     /* Snapshot initialization */
 498     register_event(mp, SnapshotTaken);
 499
 500     register_event(mp, MediaChanged);
 501
 502     /* Attach a var callback to the global object to provide the glue between
 503      * vout_thread that generates the event and media_player that re-emits it
 504      * with its own event manager
 505      *
 506      * FIXME: It's unclear why we want to put this in public API, and why we
 507      * want to expose it in such a limiting and ugly way.
 508      */
 509     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 510
 511     libvlc_retain(instance);
 512     return mp;
 513 }
 514
 515 /**************************************************************************
 516  * Create a Media Instance object with a media descriptor.
 517  **************************************************************************/
 518 libvlc_media_player_t *
 519 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 520 {
 521     libvlc_media_player_t * p_mi;
 522
 523     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 524     if( !p_mi )
 525         return NULL;
 526
 527     libvlc_media_retain( p_md );
 528     p_mi->p_md = p_md;
 529
 530     return p_mi;
 531 }
 532
 533 /**************************************************************************
 534  * Destroy a Media Instance object (libvlc internal)
 535  *
 536  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 537  **************************************************************************/
 538 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 539 {
 540     assert( p_mi );
 541
 542     /* Detach Callback from the main libvlc object */
 543     var_DelCallback( p_mi->p_libvlc,
 544                      "snapshot-file", snapshot_was_taken, p_mi );
 545
 546     /* No need for lock_input() because no other threads knows us anymore */
 547     if( p_mi->input.p_thread )
 548         release_input_thread(p_mi, true);
 549     if( p_mi->input.p_resource )
 550     {
 551         input_resource_Terminate( p_mi->input.p_resource );
 552         input_resource_Release( p_mi->input.p_resource );
 553         p_mi->input.p_resource = NULL;
 554     }
 555     vlc_mutex_destroy( &p_mi->input.lock );
 556
 557     libvlc_event_manager_release( p_mi->p_event_manager );
 558     libvlc_media_release( p_mi->p_md );
 559     vlc_mutex_destroy( &p_mi->object_lock );
 560
 561     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 562     vlc_object_release( p_mi );
 563     libvlc_release(instance);
 564 }
 565
 566 /**************************************************************************
 567  * Release a Media Instance object.
 568  *
 569  * Function does the locking.
 570  **************************************************************************/
 571 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 572 {
 573     bool destroy;
 574
 575     assert( p_mi );
 576     lock(p_mi);
 577     destroy = !--p_mi->i_refcount;
 578     unlock(p_mi);
 579
 580     if( destroy )
 581         libvlc_media_player_destroy( p_mi );
 582 }
 583
 584 /**************************************************************************
 585  * Retain a Media Instance object.
 586  *
 587  * Caller must hold the lock.
 588  **************************************************************************/
 589 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 590 {
 591     assert( p_mi );
 592
 593     lock(p_mi);
 594     p_mi->i_refcount++;
 595     unlock(p_mi);
 596 }
 597
 598 /**************************************************************************
 599  * Set the Media descriptor associated with the instance.
 600  *
 601  * Enter without lock -- function will lock the object.
 602  **************************************************************************/
 603 void libvlc_media_player_set_media(
 604                             libvlc_media_player_t *p_mi,
 605                             libvlc_media_t *p_md )
 606 {
 607     lock_input(p_mi);
 608
 609     /* FIXME I am not sure if it is a user request or on die(eof/error)
 610      * request here */
 611     release_input_thread( p_mi,
 612                           p_mi->input.p_thread &&
 613                           !p_mi->input.p_thread->b_eof &&
 614                           !p_mi->input.p_thread->b_error );
 615
 616     lock( p_mi );
 617     set_state( p_mi, libvlc_NothingSpecial, true );
 618     unlock_input( p_mi );
 619
 620     libvlc_media_release( p_mi->p_md );
 621
 622     if( !p_md )
 623     {
 624         p_mi->p_md = NULL;
 625         unlock(p_mi);
 626         return; /* It is ok to pass a NULL md */
 627     }
 628
 629     libvlc_media_retain( p_md );
 630     p_mi->p_md = p_md;
 631
 632     /* The policy here is to ignore that we were created using a different
 633      * libvlc_instance, because we don't really care */
 634     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 635
 636     unlock(p_mi);
 637
 638     /* Send an event for the newly available media */
 639     libvlc_event_t event;
 640     event.type = libvlc_MediaPlayerMediaChanged;
 641     event.u.media_player_media_changed.new_media = p_md;
 642     libvlc_event_send( p_mi->p_event_manager, &event );
 643
 644 }
 645
 646 /**************************************************************************
 647  * Get the Media descriptor associated with the instance.
 648  **************************************************************************/
 649 libvlc_media_t *
 650 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 651 {
 652     libvlc_media_t *p_m;
 653
 654     lock(p_mi);
 655     p_m = p_mi->p_md;
 656     if( p_m )
 657         libvlc_media_retain( p_mi->p_md );
 658     unlock(p_mi);
 659     return p_mi->p_md;
 660 }
 661
 662 /**************************************************************************
 663  * Get the event Manager.
 664  **************************************************************************/
 665 libvlc_event_manager_t *
 666 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 667 {
 668     return p_mi->p_event_manager;
 669 }
 670
 671 /**************************************************************************
 672  * Tell media player to start playing.
 673  **************************************************************************/
 674 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 675 {
 676     lock_input( p_mi );
 677
 678     input_thread_t *p_input_thread = p_mi->input.p_thread;
 679     if( p_input_thread )
 680     {
 681         /* A thread already exists, send it a play message */
 682         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 683         unlock_input( p_mi );
 684         return 0;
 685     }
 686
 687     /* Ignore previous exception */
 688     lock(p_mi);
 689
 690     if( !p_mi->p_md )
 691     {
 692         unlock(p_mi);
 693         unlock_input( p_mi );
 694         libvlc_printerr( "No associated media descriptor" );
 695         return -1;
 696     }
 697
 698     if( !p_mi->input.p_resource )
 699         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 700     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 701                                    p_mi->input.p_resource );
 702     unlock(p_mi);
 703     if( !p_input_thread )
 704     {
 705         unlock_input(p_mi);
 706         libvlc_printerr( "Not enough memory" );
 707         return -1;
 708     }
 709
 710     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 711     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 712     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 713
 714     if( input_Start( p_input_thread ) )
 715     {
 716         unlock_input(p_mi);
 717         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 718         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 719         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 720         vlc_object_release( p_input_thread );
 721         libvlc_printerr( "Input initialization failure" );
 722         return -1;
 723     }
 724     p_mi->input.p_thread = p_input_thread;
 725     unlock_input(p_mi);
 726     return 0;
 727 }
 728
 729 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 730 {
 731     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 732     if( !p_input_thread )
 733         return;
 734
 735     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 736     if( state == libvlc_Playing || state == libvlc_Buffering )
 737     {
 738         if( paused )
 739         {
 740             if( libvlc_media_player_can_pause( p_mi ) )
 741                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 742             else
 743                 libvlc_media_player_stop( p_mi );
 744         }
 745     }
 746     else
 747     {
 748         if( !paused )
 749             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 750     }
 751
 752     vlc_object_release( p_input_thread );
 753 }
 754
 755 /**************************************************************************
 756  * Toggle pause.
 757  **************************************************************************/
 758 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 759 {
 760     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 761     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 762
 763     libvlc_media_player_set_pause( p_mi, playing );
 764 }
 765
 766 /**************************************************************************
 767  * Tells whether the media player is currently playing.
 768  *
 769  * Enter with lock held.
 770  **************************************************************************/
 771 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 772 {
 773     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 774     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 775 }
 776
 777 /**************************************************************************
 778  * Stop playing.
 779  **************************************************************************/
 780 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 781 {
 782     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 783
 784     lock_input(p_mi);
 785     release_input_thread( p_mi, true ); /* This will stop the input thread */
 786
 787     /* Force to go to stopped state, in case we were in Ended, or Error
 788      * state. */
 789     if( state != libvlc_Stopped )
 790     {
 791         set_state( p_mi, libvlc_Stopped, false );
 792
 793         /* Construct and send the event */
 794         libvlc_event_t event;
 795         event.type = libvlc_MediaPlayerStopped;
 796         libvlc_event_send( p_mi->p_event_manager, &event );
 797     }
 798
 799     if( p_mi->input.p_resource != NULL )
 800         input_resource_Terminate( p_mi->input.p_resource );
 801     unlock_input(p_mi);
 802 }
 803
 804
 805 void libvlc_video_set_callbacks( libvlc_media_player_t *mp,
 806     void *(*lock_cb) (void *, void **),
 807     void (*unlock_cb) (void *, void *, void *const *),
 808     void (*display_cb) (void *, void *),
 809     void *opaque )
 810 {
 811     var_SetAddress( mp, "vmem-lock", lock_cb );
 812     var_SetAddress( mp, "vmem-unlock", unlock_cb );
 813     var_SetAddress( mp, "vmem-display", display_cb );
 814     var_SetAddress( mp, "vmem-data", opaque );
 815     var_SetString( mp, "vout", "vmem" );
 816 }
 817
 818 void libvlc_video_set_format_callbacks( libvlc_media_player_t *mp,
 819                                         libvlc_video_format_cb setup,
 820                                         libvlc_video_cleanup_cb cleanup )
 821 {
 822     var_SetAddress( mp, "vmem-setup", setup );
 823     var_SetAddress( mp, "vmem-cleanup", cleanup );
 824 }
 825
 826 void libvlc_video_set_format( libvlc_media_player_t *mp, const char *chroma,
 827                               unsigned width, unsigned height, unsigned pitch )
 828 {
 829     var_SetString( mp, "vmem-chroma", chroma );
 830     var_SetInteger( mp, "vmem-width", width );
 831     var_SetInteger( mp, "vmem-height", height );
 832     var_SetInteger( mp, "vmem-pitch", pitch );
 833 }
 834
 835 /**************************************************************************
 836  * set_nsobject
 837  **************************************************************************/
 838 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 839                                         void * drawable )
 840 {
 841     assert (p_mi != NULL);
 842 #ifdef __APPLE__
 843     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 844 #else
 845     (void) p_mi; (void)drawable;
 846 #endif
 847 }
 848
 849 /**************************************************************************
 850  * get_nsobject
 851  **************************************************************************/
 852 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 853 {
 854     assert (p_mi != NULL);
 855 #ifdef __APPLE__
 856     return var_GetAddress (p_mi, "drawable-nsobject");
 857 #else
 858     return NULL;
 859 #endif
 860 }
 861
 862 /**************************************************************************
 863  * set_agl
 864  **************************************************************************/
 865 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 866                                   uint32_t drawable )
 867 {
 868 #ifdef __APPLE__
 869     var_SetInteger (p_mi, "drawable-agl", drawable);
 870 #else
 871     (void) p_mi; (void)drawable;
 872 #endif
 873 }
 874
 875 /**************************************************************************
 876  * get_agl
 877  **************************************************************************/
 878 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 879 {
 880     assert (p_mi != NULL);
 881 #ifdef __APPLE__
 882     return var_GetInteger (p_mi, "drawable-agl");
 883 #else
 884     return 0;
 885 #endif
 886 }
 887
 888 /**************************************************************************
 889  * set_xwindow
 890  **************************************************************************/
 891 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 892                                       uint32_t drawable )
 893 {
 894     assert (p_mi != NULL);
 895
 896     var_SetString (p_mi, "vout", drawable ? "xid" : "any");
 897     var_SetString (p_mi, "window", drawable ? "embed-xid,any" : "any");
 898     var_SetInteger (p_mi, "drawable-xid", drawable);
 899 }
 900
 901 /**************************************************************************
 902  * get_xwindow
 903  **************************************************************************/
 904 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 905 {
 906     return var_GetInteger (p_mi, "drawable-xid");
 907 }
 908
 909 /**************************************************************************
 910  * set_hwnd
 911  **************************************************************************/
 912 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 913                                    void *drawable )
 914 {
 915     assert (p_mi != NULL);
 916 #ifdef WIN32
 917     var_SetString (p_mi, "window",
 918                    (drawable != NULL) ? "embed-hwnd,any" : "");
 919     var_SetInteger (p_mi, "drawable-hwnd", (uintptr_t)drawable);
 920 #else
 921     (void) p_mi; (void) drawable;
 922 #endif
 923 }
 924
 925 /**************************************************************************
 926  * get_hwnd
 927  **************************************************************************/
 928 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 929 {
 930     assert (p_mi != NULL);
 931 #ifdef WIN32
 932     return (void *)(uintptr_t)var_GetInteger (p_mi, "drawable-hwnd");
 933 #else
 934     return NULL;
 935 #endif
 936 }
 937
 938 void libvlc_audio_set_callbacks( libvlc_media_player_t *mp,
 939                                  libvlc_audio_play_cb play_cb,
 940                                  libvlc_audio_set_volume_cb set_volume_cb,
 941                                  void *opaque )
 942 {
 943     var_SetAddress( mp, "amem-play", play_cb );
 944     var_SetAddress( mp, "amem-set-volume", set_volume_cb );
 945     var_SetAddress( mp, "amem-data", opaque );
 946     var_SetString( mp, "aout", "amem" );
 947 }
 948
 949 void libvlc_audio_set_format_callbacks( libvlc_media_player_t *mp,
 950                                         libvlc_audio_setup_cb setup,
 951                                         libvlc_audio_cleanup_cb cleanup )
 952 {
 953     var_SetAddress( mp, "amem-setup", setup );
 954     var_SetAddress( mp, "amem-cleanup", cleanup );
 955 }
 956
 957 void libvlc_audio_set_format( libvlc_media_player_t *mp, const char *format,
 958                               unsigned rate, unsigned channels )
 959 {
 960     var_SetString( mp, "amem-format", format );
 961     var_SetInteger( mp, "amem-rate", rate );
 962     var_SetInteger( mp, "amem-channels", channels );
 963 }
 964
 965
 966 /**************************************************************************
 967  * Getters for stream information
 968  **************************************************************************/
 969 libvlc_time_t libvlc_media_player_get_length(
 970                              libvlc_media_player_t *p_mi )
 971 {
 972     input_thread_t *p_input_thread;
 973     libvlc_time_t i_time;
 974
 975     p_input_thread = libvlc_get_input_thread ( p_mi );
 976     if( !p_input_thread )
 977         return -1;
 978
 979     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 980     vlc_object_release( p_input_thread );
 981
 982     return i_time;
 983 }
 984
 985 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 986 {
 987     input_thread_t *p_input_thread;
 988     libvlc_time_t i_time;
 989
 990     p_input_thread = libvlc_get_input_thread ( p_mi );
 991     if( !p_input_thread )
 992         return -1;
 993
 994     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 995     vlc_object_release( p_input_thread );
 996     return i_time;
 997 }
 998
 999 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
1000                                    libvlc_time_t i_time )
1001 {
1002     input_thread_t *p_input_thread;
1003
1004     p_input_thread = libvlc_get_input_thread ( p_mi );
1005     if( !p_input_thread )
1006         return;
1007
1008     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
1009     vlc_object_release( p_input_thread );
1010 }
1011
1012 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
1013                                        float position )
1014 {
1015     input_thread_t *p_input_thread;
1016
1017     p_input_thread = libvlc_get_input_thread ( p_mi );
1018     if( !p_input_thread )
1019         return;
1020
1021     var_SetFloat( p_input_thread, "position", position );
1022     vlc_object_release( p_input_thread );
1023 }
1024
1025 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
1026 {
1027     input_thread_t *p_input_thread;
1028     float f_position;
1029
1030     p_input_thread = libvlc_get_input_thread ( p_mi );
1031     if( !p_input_thread )
1032         return -1.0;
1033
1034     f_position = var_GetFloat( p_input_thread, "position" );
1035     vlc_object_release( p_input_thread );
1036
1037     return f_position;
1038 }
1039
1040 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
1041                                       int chapter )
1042 {
1043     input_thread_t *p_input_thread;
1044
1045     p_input_thread = libvlc_get_input_thread ( p_mi );
1046     if( !p_input_thread )
1047         return;
1048
1049     var_SetInteger( p_input_thread, "chapter", chapter );
1050     vlc_object_release( p_input_thread );
1051 }
1052
1053 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
1054 {
1055     input_thread_t *p_input_thread;
1056     int i_chapter;
1057
1058     p_input_thread = libvlc_get_input_thread ( p_mi );
1059     if( !p_input_thread )
1060         return -1;
1061
1062     i_chapter = var_GetInteger( p_input_thread, "chapter" );
1063     vlc_object_release( p_input_thread );
1064
1065     return i_chapter;
1066 }
1067
1068 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
1069 {
1070     input_thread_t *p_input_thread;
1071     vlc_value_t val;
1072
1073     p_input_thread = libvlc_get_input_thread ( p_mi );
1074     if( !p_input_thread )
1075         return -1;
1076
1077     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
1078     vlc_object_release( p_input_thread );
1079
1080     return val.i_int;
1081 }
1082
1083 int libvlc_media_player_get_chapter_count_for_title(
1084                                  libvlc_media_player_t *p_mi,
1085                                  int i_title )
1086 {
1087     input_thread_t *p_input_thread;
1088     vlc_value_t val;
1089
1090     p_input_thread = libvlc_get_input_thread ( p_mi );
1091     if( !p_input_thread )
1092         return -1;
1093
1094     char *psz_name;
1095     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
1096     {
1097         vlc_object_release( p_input_thread );
1098         return -1;
1099     }
1100     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1101     vlc_object_release( p_input_thread );
1102     free( psz_name );
1103
1104     return val.i_int;
1105 }
1106
1107 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1108                                     int i_title )
1109 {
1110     input_thread_t *p_input_thread;
1111
1112     p_input_thread = libvlc_get_input_thread ( p_mi );
1113     if( !p_input_thread )
1114         return;
1115
1116     var_SetInteger( p_input_thread, "title", i_title );
1117     vlc_object_release( p_input_thread );
1118
1119     //send event
1120     libvlc_event_t event;
1121     event.type = libvlc_MediaPlayerTitleChanged;
1122     event.u.media_player_title_changed.new_title = i_title;
1123     libvlc_event_send( p_mi->p_event_manager, &event );
1124 }
1125
1126 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1127 {
1128     input_thread_t *p_input_thread;
1129     int i_title;
1130
1131     p_input_thread = libvlc_get_input_thread ( p_mi );
1132     if( !p_input_thread )
1133         return -1;
1134
1135     i_title = var_GetInteger( p_input_thread, "title" );
1136     vlc_object_release( p_input_thread );
1137
1138     return i_title;
1139 }
1140
1141 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1142 {
1143     input_thread_t *p_input_thread;
1144     vlc_value_t val;
1145
1146     p_input_thread = libvlc_get_input_thread ( p_mi );
1147     if( !p_input_thread )
1148         return -1;
1149
1150     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1151     vlc_object_release( p_input_thread );
1152
1153     return val.i_int;
1154 }
1155
1156 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1157 {
1158     input_thread_t *p_input_thread;
1159
1160     p_input_thread = libvlc_get_input_thread ( p_mi );
1161     if( !p_input_thread )
1162         return;
1163
1164     int i_type = var_Type( p_input_thread, "next-chapter" );
1165     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1166                             "next-chapter":"next-title" );
1167
1168     vlc_object_release( p_input_thread );
1169 }
1170
1171 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1172 {
1173     input_thread_t *p_input_thread;
1174
1175     p_input_thread = libvlc_get_input_thread ( p_mi );
1176     if( !p_input_thread )
1177         return;
1178
1179     int i_type = var_Type( p_input_thread, "next-chapter" );
1180     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1181                             "prev-chapter":"prev-title" );
1182
1183     vlc_object_release( p_input_thread );
1184 }
1185
1186 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1187 {
1188     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1189     double f_fps = 0.0;
1190
1191     if( p_input_thread )
1192     {
1193         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1194             f_fps = 0.0;
1195         vlc_object_release( p_input_thread );
1196     }
1197     return f_fps;
1198 }
1199
1200 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1201 {
1202     bool b_will_play;
1203     input_thread_t *p_input_thread =
1204                             libvlc_get_input_thread ( p_mi );
1205     if ( !p_input_thread )
1206         return false;
1207
1208     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1209     vlc_object_release( p_input_thread );
1210
1211     return b_will_play;
1212 }
1213
1214 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1215 {
1216     if (rate < 0.)
1217     {
1218         libvlc_printerr ("Playing backward not supported");
1219         return -1;
1220     }
1221
1222     var_SetFloat (p_mi, "rate", rate);
1223
1224     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1225     if( !p_input_thread )
1226         return 0;
1227     var_SetFloat( p_input_thread, "rate", rate );
1228     vlc_object_release( p_input_thread );
1229     return 0;
1230 }
1231
1232 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1233 {
1234     return var_GetFloat (p_mi, "rate");
1235 }
1236
1237 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1238 {
1239     lock(p_mi);
1240     libvlc_state_t state = p_mi->state;
1241     unlock(p_mi);
1242     return state;
1243 }
1244
1245 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1246 {
1247     input_thread_t *p_input_thread;
1248     bool b_seekable;
1249
1250     p_input_thread = libvlc_get_input_thread ( p_mi );
1251     if ( !p_input_thread )
1252         return false;
1253     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1254     vlc_object_release( p_input_thread );
1255
1256     return b_seekable;
1257 }
1258
1259 void libvlc_media_player_navigate( libvlc_media_player_t* p_mi,
1260                                    unsigned navigate )
1261 {
1262     input_thread_t *p_input_thread;
1263
1264     if ( navigate > libvlc_navigate_to_action_size)
1265       return;
1266
1267     p_input_thread = libvlc_get_input_thread ( p_mi );
1268     if ( !p_input_thread )
1269       return;
1270
1271     var_SetInteger( p_mi->p_libvlc_instance->p_libvlc_int,
1272                     "key-action", libvlc_navigate_to_action[navigate] );
1273
1274     vlc_object_release( p_input_thread );
1275 }
1276
1277 /* internal function, used by audio, video */
1278 libvlc_track_description_t *
1279         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1280                                       const char *psz_variable )
1281 {
1282     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1283     libvlc_track_description_t *p_track_description = NULL,
1284                                *p_actual, *p_previous;
1285
1286     if( !p_input )
1287         return NULL;
1288
1289     vlc_value_t val_list, text_list;
1290     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1291
1292     /* no tracks */
1293     if( val_list.p_list->i_count <= 0 )
1294         goto end;
1295
1296     p_track_description = ( libvlc_track_description_t * )
1297         malloc( sizeof( libvlc_track_description_t ) );
1298     if ( !p_track_description )
1299     {
1300         libvlc_printerr( "Not enough memory" );
1301         goto end;
1302     }
1303     p_actual = p_track_description;
1304     p_previous = NULL;
1305     for( int i = 0; i < val_list.p_list->i_count; i++ )
1306     {
1307         if( !p_actual )
1308         {
1309             p_actual = ( libvlc_track_description_t * )
1310                 malloc( sizeof( libvlc_track_description_t ) );
1311             if ( !p_actual )
1312             {
1313                 libvlc_track_description_release( p_track_description );
1314                 libvlc_printerr( "Not enough memory" );
1315                 goto end;
1316             }
1317         }
1318         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1319         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1320         p_actual->p_next = NULL;
1321         if( p_previous )
1322             p_previous->p_next = p_actual;
1323         p_previous = p_actual;
1324         p_actual =  NULL;
1325     }
1326
1327 end:
1328     var_FreeList( &val_list, &text_list );
1329     vlc_object_release( p_input );
1330
1331     return p_track_description;
1332 }
1333
1334 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1335 {
1336     libvlc_track_description_t *p_actual, *p_before;
1337     p_actual = p_td;
1338
1339     while ( p_actual )
1340     {
1341         free( p_actual->psz_name );
1342         p_before = p_actual;
1343         p_actual = p_before->p_next;
1344         free( p_before );
1345     }
1346 }
1347
1348 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1349 {
1350     input_thread_t *p_input_thread;
1351     bool b_can_pause;
1352
1353     p_input_thread = libvlc_get_input_thread ( p_mi );
1354     if ( !p_input_thread )
1355         return false;
1356     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1357     vlc_object_release( p_input_thread );
1358
1359     return b_can_pause;
1360 }
1361
1362 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1363 {
1364     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1365     if( p_input_thread != NULL )
1366     {
1367         var_TriggerCallback( p_input_thread, "frame-next" );
1368         vlc_object_release( p_input_thread );
1369     }
1370 }