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-pause", VLC_VAR_ADDRESS);
 460     var_Create (mp, "amem-resume", VLC_VAR_ADDRESS);
 461     var_Create (mp, "amem-flush", VLC_VAR_ADDRESS);
 462     var_Create (mp, "amem-drain", VLC_VAR_ADDRESS);
 463     var_Create (mp, "amem-set-volume", VLC_VAR_ADDRESS);
 464     var_Create (mp, "amem-format", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 465     var_Create (mp, "amem-rate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 466     var_Create (mp, "amem-channels", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 467
 468     mp->p_md = NULL;
 469     mp->state = libvlc_NothingSpecial;
 470     mp->p_libvlc_instance = instance;
 471     mp->input.p_thread = NULL;
 472     mp->input.p_resource = NULL;
 473     vlc_mutex_init (&mp->input.lock);
 474     mp->i_refcount = 1;
 475     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 476     if (unlikely(mp->p_event_manager == NULL))
 477     {
 478         vlc_object_release(mp);
 479         return NULL;
 480     }
 481     vlc_mutex_init(&mp->object_lock);
 482
 483     register_event(mp, NothingSpecial);
 484     register_event(mp, Opening);
 485     register_event(mp, Buffering);
 486     register_event(mp, Playing);
 487     register_event(mp, Paused);
 488     register_event(mp, Stopped);
 489     register_event(mp, Forward);
 490     register_event(mp, Backward);
 491     register_event(mp, EndReached);
 492     register_event(mp, EncounteredError);
 493     register_event(mp, SeekableChanged);
 494
 495     register_event(mp, PositionChanged);
 496     register_event(mp, TimeChanged);
 497     register_event(mp, LengthChanged);
 498     register_event(mp, TitleChanged);
 499     register_event(mp, PausableChanged);
 500
 501     /* Snapshot initialization */
 502     register_event(mp, SnapshotTaken);
 503
 504     register_event(mp, MediaChanged);
 505
 506     /* Attach a var callback to the global object to provide the glue between
 507      * vout_thread that generates the event and media_player that re-emits it
 508      * with its own event manager
 509      *
 510      * FIXME: It's unclear why we want to put this in public API, and why we
 511      * want to expose it in such a limiting and ugly way.
 512      */
 513     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 514
 515     libvlc_retain(instance);
 516     return mp;
 517 }
 518
 519 /**************************************************************************
 520  * Create a Media Instance object with a media descriptor.
 521  **************************************************************************/
 522 libvlc_media_player_t *
 523 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 524 {
 525     libvlc_media_player_t * p_mi;
 526
 527     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 528     if( !p_mi )
 529         return NULL;
 530
 531     libvlc_media_retain( p_md );
 532     p_mi->p_md = p_md;
 533
 534     return p_mi;
 535 }
 536
 537 /**************************************************************************
 538  * Destroy a Media Instance object (libvlc internal)
 539  *
 540  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 541  **************************************************************************/
 542 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 543 {
 544     assert( p_mi );
 545
 546     /* Detach Callback from the main libvlc object */
 547     var_DelCallback( p_mi->p_libvlc,
 548                      "snapshot-file", snapshot_was_taken, p_mi );
 549
 550     /* No need for lock_input() because no other threads knows us anymore */
 551     if( p_mi->input.p_thread )
 552         release_input_thread(p_mi, true);
 553     if( p_mi->input.p_resource )
 554     {
 555         input_resource_Terminate( p_mi->input.p_resource );
 556         input_resource_Release( p_mi->input.p_resource );
 557         p_mi->input.p_resource = NULL;
 558     }
 559     vlc_mutex_destroy( &p_mi->input.lock );
 560
 561     libvlc_event_manager_release( p_mi->p_event_manager );
 562     libvlc_media_release( p_mi->p_md );
 563     vlc_mutex_destroy( &p_mi->object_lock );
 564
 565     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 566     vlc_object_release( p_mi );
 567     libvlc_release(instance);
 568 }
 569
 570 /**************************************************************************
 571  * Release a Media Instance object.
 572  *
 573  * Function does the locking.
 574  **************************************************************************/
 575 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 576 {
 577     bool destroy;
 578
 579     assert( p_mi );
 580     lock(p_mi);
 581     destroy = !--p_mi->i_refcount;
 582     unlock(p_mi);
 583
 584     if( destroy )
 585         libvlc_media_player_destroy( p_mi );
 586 }
 587
 588 /**************************************************************************
 589  * Retain a Media Instance object.
 590  *
 591  * Caller must hold the lock.
 592  **************************************************************************/
 593 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 594 {
 595     assert( p_mi );
 596
 597     lock(p_mi);
 598     p_mi->i_refcount++;
 599     unlock(p_mi);
 600 }
 601
 602 /**************************************************************************
 603  * Set the Media descriptor associated with the instance.
 604  *
 605  * Enter without lock -- function will lock the object.
 606  **************************************************************************/
 607 void libvlc_media_player_set_media(
 608                             libvlc_media_player_t *p_mi,
 609                             libvlc_media_t *p_md )
 610 {
 611     lock_input(p_mi);
 612
 613     /* FIXME I am not sure if it is a user request or on die(eof/error)
 614      * request here */
 615     release_input_thread( p_mi,
 616                           p_mi->input.p_thread &&
 617                           !p_mi->input.p_thread->b_eof &&
 618                           !p_mi->input.p_thread->b_error );
 619
 620     lock( p_mi );
 621     set_state( p_mi, libvlc_NothingSpecial, true );
 622     unlock_input( p_mi );
 623
 624     libvlc_media_release( p_mi->p_md );
 625
 626     if( !p_md )
 627     {
 628         p_mi->p_md = NULL;
 629         unlock(p_mi);
 630         return; /* It is ok to pass a NULL md */
 631     }
 632
 633     libvlc_media_retain( p_md );
 634     p_mi->p_md = p_md;
 635
 636     /* The policy here is to ignore that we were created using a different
 637      * libvlc_instance, because we don't really care */
 638     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 639
 640     unlock(p_mi);
 641
 642     /* Send an event for the newly available media */
 643     libvlc_event_t event;
 644     event.type = libvlc_MediaPlayerMediaChanged;
 645     event.u.media_player_media_changed.new_media = p_md;
 646     libvlc_event_send( p_mi->p_event_manager, &event );
 647
 648 }
 649
 650 /**************************************************************************
 651  * Get the Media descriptor associated with the instance.
 652  **************************************************************************/
 653 libvlc_media_t *
 654 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 655 {
 656     libvlc_media_t *p_m;
 657
 658     lock(p_mi);
 659     p_m = p_mi->p_md;
 660     if( p_m )
 661         libvlc_media_retain( p_mi->p_md );
 662     unlock(p_mi);
 663     return p_mi->p_md;
 664 }
 665
 666 /**************************************************************************
 667  * Get the event Manager.
 668  **************************************************************************/
 669 libvlc_event_manager_t *
 670 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 671 {
 672     return p_mi->p_event_manager;
 673 }
 674
 675 /**************************************************************************
 676  * Tell media player to start playing.
 677  **************************************************************************/
 678 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 679 {
 680     lock_input( p_mi );
 681
 682     input_thread_t *p_input_thread = p_mi->input.p_thread;
 683     if( p_input_thread )
 684     {
 685         /* A thread already exists, send it a play message */
 686         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 687         unlock_input( p_mi );
 688         return 0;
 689     }
 690
 691     /* Ignore previous exception */
 692     lock(p_mi);
 693
 694     if( !p_mi->p_md )
 695     {
 696         unlock(p_mi);
 697         unlock_input( p_mi );
 698         libvlc_printerr( "No associated media descriptor" );
 699         return -1;
 700     }
 701
 702     if( !p_mi->input.p_resource )
 703         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 704     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 705                                    p_mi->input.p_resource );
 706     unlock(p_mi);
 707     if( !p_input_thread )
 708     {
 709         unlock_input(p_mi);
 710         libvlc_printerr( "Not enough memory" );
 711         return -1;
 712     }
 713
 714     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 715     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 716     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 717
 718     if( input_Start( p_input_thread ) )
 719     {
 720         unlock_input(p_mi);
 721         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 722         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 723         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 724         vlc_object_release( p_input_thread );
 725         libvlc_printerr( "Input initialization failure" );
 726         return -1;
 727     }
 728     p_mi->input.p_thread = p_input_thread;
 729     unlock_input(p_mi);
 730     return 0;
 731 }
 732
 733 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 734 {
 735     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 736     if( !p_input_thread )
 737         return;
 738
 739     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 740     if( state == libvlc_Playing || state == libvlc_Buffering )
 741     {
 742         if( paused )
 743         {
 744             if( libvlc_media_player_can_pause( p_mi ) )
 745                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 746             else
 747                 libvlc_media_player_stop( p_mi );
 748         }
 749     }
 750     else
 751     {
 752         if( !paused )
 753             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 754     }
 755
 756     vlc_object_release( p_input_thread );
 757 }
 758
 759 /**************************************************************************
 760  * Toggle pause.
 761  **************************************************************************/
 762 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 763 {
 764     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 765     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 766
 767     libvlc_media_player_set_pause( p_mi, playing );
 768 }
 769
 770 /**************************************************************************
 771  * Tells whether the media player is currently playing.
 772  *
 773  * Enter with lock held.
 774  **************************************************************************/
 775 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 776 {
 777     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 778     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 779 }
 780
 781 /**************************************************************************
 782  * Stop playing.
 783  **************************************************************************/
 784 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 785 {
 786     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 787
 788     lock_input(p_mi);
 789     release_input_thread( p_mi, true ); /* This will stop the input thread */
 790
 791     /* Force to go to stopped state, in case we were in Ended, or Error
 792      * state. */
 793     if( state != libvlc_Stopped )
 794     {
 795         set_state( p_mi, libvlc_Stopped, false );
 796
 797         /* Construct and send the event */
 798         libvlc_event_t event;
 799         event.type = libvlc_MediaPlayerStopped;
 800         libvlc_event_send( p_mi->p_event_manager, &event );
 801     }
 802
 803     if( p_mi->input.p_resource != NULL )
 804         input_resource_Terminate( p_mi->input.p_resource );
 805     unlock_input(p_mi);
 806 }
 807
 808
 809 void libvlc_video_set_callbacks( libvlc_media_player_t *mp,
 810     void *(*lock_cb) (void *, void **),
 811     void (*unlock_cb) (void *, void *, void *const *),
 812     void (*display_cb) (void *, void *),
 813     void *opaque )
 814 {
 815     var_SetAddress( mp, "vmem-lock", lock_cb );
 816     var_SetAddress( mp, "vmem-unlock", unlock_cb );
 817     var_SetAddress( mp, "vmem-display", display_cb );
 818     var_SetAddress( mp, "vmem-data", opaque );
 819     var_SetString( mp, "vout", "vmem" );
 820 }
 821
 822 void libvlc_video_set_format_callbacks( libvlc_media_player_t *mp,
 823                                         libvlc_video_format_cb setup,
 824                                         libvlc_video_cleanup_cb cleanup )
 825 {
 826     var_SetAddress( mp, "vmem-setup", setup );
 827     var_SetAddress( mp, "vmem-cleanup", cleanup );
 828 }
 829
 830 void libvlc_video_set_format( libvlc_media_player_t *mp, const char *chroma,
 831                               unsigned width, unsigned height, unsigned pitch )
 832 {
 833     var_SetString( mp, "vmem-chroma", chroma );
 834     var_SetInteger( mp, "vmem-width", width );
 835     var_SetInteger( mp, "vmem-height", height );
 836     var_SetInteger( mp, "vmem-pitch", pitch );
 837 }
 838
 839 /**************************************************************************
 840  * set_nsobject
 841  **************************************************************************/
 842 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 843                                         void * drawable )
 844 {
 845     assert (p_mi != NULL);
 846 #ifdef __APPLE__
 847     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 848 #else
 849     (void) p_mi; (void)drawable;
 850 #endif
 851 }
 852
 853 /**************************************************************************
 854  * get_nsobject
 855  **************************************************************************/
 856 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 857 {
 858     assert (p_mi != NULL);
 859 #ifdef __APPLE__
 860     return var_GetAddress (p_mi, "drawable-nsobject");
 861 #else
 862     return NULL;
 863 #endif
 864 }
 865
 866 /**************************************************************************
 867  * set_agl
 868  **************************************************************************/
 869 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 870                                   uint32_t drawable )
 871 {
 872 #ifdef __APPLE__
 873     var_SetInteger (p_mi, "drawable-agl", drawable);
 874 #else
 875     (void) p_mi; (void)drawable;
 876 #endif
 877 }
 878
 879 /**************************************************************************
 880  * get_agl
 881  **************************************************************************/
 882 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 883 {
 884     assert (p_mi != NULL);
 885 #ifdef __APPLE__
 886     return var_GetInteger (p_mi, "drawable-agl");
 887 #else
 888     return 0;
 889 #endif
 890 }
 891
 892 /**************************************************************************
 893  * set_xwindow
 894  **************************************************************************/
 895 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 896                                       uint32_t drawable )
 897 {
 898     assert (p_mi != NULL);
 899
 900     var_SetString (p_mi, "vout", drawable ? "xid" : "any");
 901     var_SetString (p_mi, "window", drawable ? "embed-xid,any" : "any");
 902     var_SetInteger (p_mi, "drawable-xid", drawable);
 903 }
 904
 905 /**************************************************************************
 906  * get_xwindow
 907  **************************************************************************/
 908 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 909 {
 910     return var_GetInteger (p_mi, "drawable-xid");
 911 }
 912
 913 /**************************************************************************
 914  * set_hwnd
 915  **************************************************************************/
 916 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 917                                    void *drawable )
 918 {
 919     assert (p_mi != NULL);
 920 #ifdef WIN32
 921     var_SetString (p_mi, "window",
 922                    (drawable != NULL) ? "embed-hwnd,any" : "");
 923     var_SetInteger (p_mi, "drawable-hwnd", (uintptr_t)drawable);
 924 #else
 925     (void) p_mi; (void) drawable;
 926 #endif
 927 }
 928
 929 /**************************************************************************
 930  * get_hwnd
 931  **************************************************************************/
 932 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 933 {
 934     assert (p_mi != NULL);
 935 #ifdef WIN32
 936     return (void *)(uintptr_t)var_GetInteger (p_mi, "drawable-hwnd");
 937 #else
 938     return NULL;
 939 #endif
 940 }
 941
 942 void libvlc_audio_set_callbacks( libvlc_media_player_t *mp,
 943                                  libvlc_audio_play_cb play_cb,
 944                                  libvlc_audio_pause_cb pause_cb,
 945                                  libvlc_audio_resume_cb resume_cb,
 946                                  libvlc_audio_flush_cb flush_cb,
 947                                  libvlc_audio_drain_cb drain_cb,
 948                                  void *opaque )
 949 {
 950     var_SetAddress( mp, "amem-play", play_cb );
 951     var_SetAddress( mp, "amem-pause", pause_cb );
 952     var_SetAddress( mp, "amem-resume", resume_cb );
 953     var_SetAddress( mp, "amem-flush", flush_cb );
 954     var_SetAddress( mp, "amem-drain", drain_cb );
 955     var_SetAddress( mp, "amem-data", opaque );
 956     var_SetString( mp, "aout", "amem,none" );
 957 }
 958
 959 void libvlc_audio_set_volume_callback( libvlc_media_player_t *mp,
 960                                        libvlc_audio_set_volume_cb cb )
 961 {
 962     var_SetAddress( mp, "amem-set-volume", cb );
 963 }
 964
 965 void libvlc_audio_set_format_callbacks( libvlc_media_player_t *mp,
 966                                         libvlc_audio_setup_cb setup,
 967                                         libvlc_audio_cleanup_cb cleanup )
 968 {
 969     var_SetAddress( mp, "amem-setup", setup );
 970     var_SetAddress( mp, "amem-cleanup", cleanup );
 971 }
 972
 973 void libvlc_audio_set_format( libvlc_media_player_t *mp, const char *format,
 974                               unsigned rate, unsigned channels )
 975 {
 976     var_SetString( mp, "amem-format", format );
 977     var_SetInteger( mp, "amem-rate", rate );
 978     var_SetInteger( mp, "amem-channels", channels );
 979 }
 980
 981
 982 /**************************************************************************
 983  * Getters for stream information
 984  **************************************************************************/
 985 libvlc_time_t libvlc_media_player_get_length(
 986                              libvlc_media_player_t *p_mi )
 987 {
 988     input_thread_t *p_input_thread;
 989     libvlc_time_t i_time;
 990
 991     p_input_thread = libvlc_get_input_thread ( p_mi );
 992     if( !p_input_thread )
 993         return -1;
 994
 995     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 996     vlc_object_release( p_input_thread );
 997
 998     return i_time;
 999 }
1000
1001 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
1002 {
1003     input_thread_t *p_input_thread;
1004     libvlc_time_t i_time;
1005
1006     p_input_thread = libvlc_get_input_thread ( p_mi );
1007     if( !p_input_thread )
1008         return -1;
1009
1010     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
1011     vlc_object_release( p_input_thread );
1012     return i_time;
1013 }
1014
1015 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
1016                                    libvlc_time_t i_time )
1017 {
1018     input_thread_t *p_input_thread;
1019
1020     p_input_thread = libvlc_get_input_thread ( p_mi );
1021     if( !p_input_thread )
1022         return;
1023
1024     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
1025     vlc_object_release( p_input_thread );
1026 }
1027
1028 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
1029                                        float position )
1030 {
1031     input_thread_t *p_input_thread;
1032
1033     p_input_thread = libvlc_get_input_thread ( p_mi );
1034     if( !p_input_thread )
1035         return;
1036
1037     var_SetFloat( p_input_thread, "position", position );
1038     vlc_object_release( p_input_thread );
1039 }
1040
1041 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
1042 {
1043     input_thread_t *p_input_thread;
1044     float f_position;
1045
1046     p_input_thread = libvlc_get_input_thread ( p_mi );
1047     if( !p_input_thread )
1048         return -1.0;
1049
1050     f_position = var_GetFloat( p_input_thread, "position" );
1051     vlc_object_release( p_input_thread );
1052
1053     return f_position;
1054 }
1055
1056 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
1057                                       int chapter )
1058 {
1059     input_thread_t *p_input_thread;
1060
1061     p_input_thread = libvlc_get_input_thread ( p_mi );
1062     if( !p_input_thread )
1063         return;
1064
1065     var_SetInteger( p_input_thread, "chapter", chapter );
1066     vlc_object_release( p_input_thread );
1067 }
1068
1069 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
1070 {
1071     input_thread_t *p_input_thread;
1072     int i_chapter;
1073
1074     p_input_thread = libvlc_get_input_thread ( p_mi );
1075     if( !p_input_thread )
1076         return -1;
1077
1078     i_chapter = var_GetInteger( p_input_thread, "chapter" );
1079     vlc_object_release( p_input_thread );
1080
1081     return i_chapter;
1082 }
1083
1084 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
1085 {
1086     input_thread_t *p_input_thread;
1087     vlc_value_t val;
1088
1089     p_input_thread = libvlc_get_input_thread ( p_mi );
1090     if( !p_input_thread )
1091         return -1;
1092
1093     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
1094     vlc_object_release( p_input_thread );
1095
1096     return val.i_int;
1097 }
1098
1099 int libvlc_media_player_get_chapter_count_for_title(
1100                                  libvlc_media_player_t *p_mi,
1101                                  int i_title )
1102 {
1103     input_thread_t *p_input_thread;
1104     vlc_value_t val;
1105
1106     p_input_thread = libvlc_get_input_thread ( p_mi );
1107     if( !p_input_thread )
1108         return -1;
1109
1110     char *psz_name;
1111     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
1112     {
1113         vlc_object_release( p_input_thread );
1114         return -1;
1115     }
1116     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1117     vlc_object_release( p_input_thread );
1118     free( psz_name );
1119
1120     return val.i_int;
1121 }
1122
1123 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1124                                     int i_title )
1125 {
1126     input_thread_t *p_input_thread;
1127
1128     p_input_thread = libvlc_get_input_thread ( p_mi );
1129     if( !p_input_thread )
1130         return;
1131
1132     var_SetInteger( p_input_thread, "title", i_title );
1133     vlc_object_release( p_input_thread );
1134
1135     //send event
1136     libvlc_event_t event;
1137     event.type = libvlc_MediaPlayerTitleChanged;
1138     event.u.media_player_title_changed.new_title = i_title;
1139     libvlc_event_send( p_mi->p_event_manager, &event );
1140 }
1141
1142 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1143 {
1144     input_thread_t *p_input_thread;
1145     int i_title;
1146
1147     p_input_thread = libvlc_get_input_thread ( p_mi );
1148     if( !p_input_thread )
1149         return -1;
1150
1151     i_title = var_GetInteger( p_input_thread, "title" );
1152     vlc_object_release( p_input_thread );
1153
1154     return i_title;
1155 }
1156
1157 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1158 {
1159     input_thread_t *p_input_thread;
1160     vlc_value_t val;
1161
1162     p_input_thread = libvlc_get_input_thread ( p_mi );
1163     if( !p_input_thread )
1164         return -1;
1165
1166     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1167     vlc_object_release( p_input_thread );
1168
1169     return val.i_int;
1170 }
1171
1172 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1173 {
1174     input_thread_t *p_input_thread;
1175
1176     p_input_thread = libvlc_get_input_thread ( p_mi );
1177     if( !p_input_thread )
1178         return;
1179
1180     int i_type = var_Type( p_input_thread, "next-chapter" );
1181     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1182                             "next-chapter":"next-title" );
1183
1184     vlc_object_release( p_input_thread );
1185 }
1186
1187 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1188 {
1189     input_thread_t *p_input_thread;
1190
1191     p_input_thread = libvlc_get_input_thread ( p_mi );
1192     if( !p_input_thread )
1193         return;
1194
1195     int i_type = var_Type( p_input_thread, "next-chapter" );
1196     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1197                             "prev-chapter":"prev-title" );
1198
1199     vlc_object_release( p_input_thread );
1200 }
1201
1202 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1203 {
1204     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1205     double f_fps = 0.0;
1206
1207     if( p_input_thread )
1208     {
1209         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1210             f_fps = 0.0;
1211         vlc_object_release( p_input_thread );
1212     }
1213     return f_fps;
1214 }
1215
1216 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1217 {
1218     bool b_will_play;
1219     input_thread_t *p_input_thread =
1220                             libvlc_get_input_thread ( p_mi );
1221     if ( !p_input_thread )
1222         return false;
1223
1224     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1225     vlc_object_release( p_input_thread );
1226
1227     return b_will_play;
1228 }
1229
1230 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1231 {
1232     if (rate < 0.)
1233     {
1234         libvlc_printerr ("Playing backward not supported");
1235         return -1;
1236     }
1237
1238     var_SetFloat (p_mi, "rate", rate);
1239
1240     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1241     if( !p_input_thread )
1242         return 0;
1243     var_SetFloat( p_input_thread, "rate", rate );
1244     vlc_object_release( p_input_thread );
1245     return 0;
1246 }
1247
1248 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1249 {
1250     return var_GetFloat (p_mi, "rate");
1251 }
1252
1253 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1254 {
1255     lock(p_mi);
1256     libvlc_state_t state = p_mi->state;
1257     unlock(p_mi);
1258     return state;
1259 }
1260
1261 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1262 {
1263     input_thread_t *p_input_thread;
1264     bool b_seekable;
1265
1266     p_input_thread = libvlc_get_input_thread ( p_mi );
1267     if ( !p_input_thread )
1268         return false;
1269     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1270     vlc_object_release( p_input_thread );
1271
1272     return b_seekable;
1273 }
1274
1275 void libvlc_media_player_navigate( libvlc_media_player_t* p_mi,
1276                                    unsigned navigate )
1277 {
1278     input_thread_t *p_input_thread;
1279
1280     if ( navigate > libvlc_navigate_to_action_size)
1281       return;
1282
1283     p_input_thread = libvlc_get_input_thread ( p_mi );
1284     if ( !p_input_thread )
1285       return;
1286
1287     var_SetInteger( p_mi->p_libvlc_instance->p_libvlc_int,
1288                     "key-action", libvlc_navigate_to_action[navigate] );
1289
1290     vlc_object_release( p_input_thread );
1291 }
1292
1293 /* internal function, used by audio, video */
1294 libvlc_track_description_t *
1295         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1296                                       const char *psz_variable )
1297 {
1298     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1299     libvlc_track_description_t *p_track_description = NULL,
1300                                *p_actual, *p_previous;
1301
1302     if( !p_input )
1303         return NULL;
1304
1305     vlc_value_t val_list, text_list;
1306     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1307
1308     /* no tracks */
1309     if( val_list.p_list->i_count <= 0 )
1310         goto end;
1311
1312     p_track_description = ( libvlc_track_description_t * )
1313         malloc( sizeof( libvlc_track_description_t ) );
1314     if ( !p_track_description )
1315     {
1316         libvlc_printerr( "Not enough memory" );
1317         goto end;
1318     }
1319     p_actual = p_track_description;
1320     p_previous = NULL;
1321     for( int i = 0; i < val_list.p_list->i_count; i++ )
1322     {
1323         if( !p_actual )
1324         {
1325             p_actual = ( libvlc_track_description_t * )
1326                 malloc( sizeof( libvlc_track_description_t ) );
1327             if ( !p_actual )
1328             {
1329                 libvlc_track_description_release( p_track_description );
1330                 libvlc_printerr( "Not enough memory" );
1331                 goto end;
1332             }
1333         }
1334         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1335         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1336         p_actual->p_next = NULL;
1337         if( p_previous )
1338             p_previous->p_next = p_actual;
1339         p_previous = p_actual;
1340         p_actual =  NULL;
1341     }
1342
1343 end:
1344     var_FreeList( &val_list, &text_list );
1345     vlc_object_release( p_input );
1346
1347     return p_track_description;
1348 }
1349
1350 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1351 {
1352     libvlc_track_description_t *p_actual, *p_before;
1353     p_actual = p_td;
1354
1355     while ( p_actual )
1356     {
1357         free( p_actual->psz_name );
1358         p_before = p_actual;
1359         p_actual = p_before->p_next;
1360         free( p_before );
1361     }
1362 }
1363
1364 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1365 {
1366     input_thread_t *p_input_thread;
1367     bool b_can_pause;
1368
1369     p_input_thread = libvlc_get_input_thread ( p_mi );
1370     if ( !p_input_thread )
1371         return false;
1372     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1373     vlc_object_release( p_input_thread );
1374
1375     return b_can_pause;
1376 }
1377
1378 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1379 {
1380     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1381     if( p_input_thread != NULL )
1382     {
1383         var_TriggerCallback( p_input_thread, "frame-next" );
1384         vlc_object_release( p_input_thread );
1385     }
1386 }