git.sesse.net Git - vlc/blob - lib/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_internal.h"
  40 #include "media_internal.h" // libvlc_media_set_state()
  41 #include "media_player_internal.h"
  42
  43 /*
  44  * mapping of libvlc_navigate_mode_t to vlc_action_t
  45  */
  46 static const vlc_action_t libvlc_navigate_to_action[] =
  47 {
  48     ACTIONID_NAV_ACTIVATE,
  49     ACTIONID_NAV_UP,
  50     ACTIONID_NAV_DOWN,
  51     ACTIONID_NAV_LEFT,
  52     ACTIONID_NAV_RIGHT
  53 };
  54
  55 static const uint32_t libvlc_navigate_to_action_size =                  \
  56   sizeof( libvlc_navigate_to_action ) / sizeof( libvlc_navigate_to_action[0] );
  57
  58
  59 static int
  60 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
  61                         vlc_value_t oldval, vlc_value_t newval,
  62                         void * p_userdata );
  63 static int
  64 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
  65                         vlc_value_t oldval, vlc_value_t newval,
  66                         void * p_userdata );
  67 static int
  68 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
  69                      vlc_value_t oldval, vlc_value_t newval,
  70                      void * p_userdata );
  71
  72 static int
  73 snapshot_was_taken( vlc_object_t *p_this, char const *psz_cmd,
  74                     vlc_value_t oldval, vlc_value_t newval, void *p_data );
  75
  76 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi );
  77
  78 /*
  79  * Shortcuts
  80  */
  81
  82 #define register_event(a, b) __register_event(a, libvlc_MediaPlayer ## b)
  83 static inline void __register_event(libvlc_media_player_t *mp, libvlc_event_type_t type)
  84 {
  85     libvlc_event_manager_register_event_type(mp->p_event_manager, type);
  86 }
  87
  88 /*
  89  * The input lock protects the input and input resource pointer.
  90  * It MUST NOT be used from callbacks.
  91  *
  92  * The object lock protects the reset, namely the media and the player state.
  93  * It can, and usually needs to be taken from callbacks.
  94  * The object lock can be acquired under the input lock... and consequently
  95  * the opposite order is STRICTLY PROHIBITED.
  96  */
  97 static inline void lock(libvlc_media_player_t *mp)
  98 {
  99     vlc_mutex_lock(&mp->object_lock);
 100 }
 101
 102 static inline void unlock(libvlc_media_player_t *mp)
 103 {
 104     vlc_mutex_unlock(&mp->object_lock);
 105 }
 106
 107 static inline void lock_input(libvlc_media_player_t *mp)
 108 {
 109     vlc_mutex_lock(&mp->input.lock);
 110 }
 111
 112 static inline void unlock_input(libvlc_media_player_t *mp)
 113 {
 114     vlc_mutex_unlock(&mp->input.lock);
 115 }
 116
 117 /*
 118  * Release the associated input thread.
 119  *
 120  * Object lock is NOT held.
 121  * Input lock is held or instance is being destroyed.
 122  */
 123 static void release_input_thread( libvlc_media_player_t *p_mi, bool b_input_abort )
 124 {
 125     assert( p_mi );
 126
 127     input_thread_t *p_input_thread = p_mi->input.p_thread;
 128     if( !p_input_thread )
 129         return;
 130     p_mi->input.p_thread = NULL;
 131
 132     var_DelCallback( p_input_thread, "can-seek",
 133                      input_seekable_changed, p_mi );
 134     var_DelCallback( p_input_thread, "can-pause",
 135                     input_pausable_changed, p_mi );
 136     var_DelCallback( p_input_thread, "intf-event",
 137                      input_event_changed, p_mi );
 138
 139     /* We owned this one */
 140     input_Stop( p_input_thread, b_input_abort );
 141     input_Close( p_input_thread );
 142 }
 143
 144 /*
 145  * Retrieve the input thread. Be sure to release the object
 146  * once you are done with it. (libvlc Internal)
 147  */
 148 input_thread_t *libvlc_get_input_thread( libvlc_media_player_t *p_mi )
 149 {
 150     input_thread_t *p_input_thread;
 151
 152     assert( p_mi );
 153
 154     lock_input(p_mi);
 155     p_input_thread = p_mi->input.p_thread;
 156     if( p_input_thread )
 157         vlc_object_hold( p_input_thread );
 158     else
 159         libvlc_printerr( "No active input" );
 160     unlock_input(p_mi);
 161
 162     return p_input_thread;
 163 }
 164
 165 /*
 166  * Set the internal state of the media_player. (media player Internal)
 167  *
 168  * Function will lock the media_player.
 169  */
 170 static void set_state( libvlc_media_player_t *p_mi, libvlc_state_t state,
 171     bool b_locked )
 172 {
 173     if(!b_locked)
 174         lock(p_mi);
 175     p_mi->state = state;
 176
 177     libvlc_media_t *media = p_mi->p_md;
 178     if (media)
 179         libvlc_media_retain(media);
 180
 181     if(!b_locked)
 182         unlock(p_mi);
 183
 184     if (media)
 185     {
 186         // Also set the state of the corresponding media
 187         // This is strictly for convenience.
 188         libvlc_media_set_state(media, state);
 189
 190         libvlc_media_release(media);
 191     }
 192 }
 193
 194 static int
 195 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
 196                         vlc_value_t oldval, vlc_value_t newval,
 197                         void * p_userdata )
 198 {
 199     VLC_UNUSED(oldval);
 200     VLC_UNUSED(p_this);
 201     VLC_UNUSED(psz_cmd);
 202     libvlc_media_player_t * p_mi = p_userdata;
 203     libvlc_event_t event;
 204
 205     event.type = libvlc_MediaPlayerSeekableChanged;
 206     event.u.media_player_seekable_changed.new_seekable = newval.b_bool;
 207
 208     libvlc_event_send( p_mi->p_event_manager, &event );
 209     return VLC_SUCCESS;
 210 }
 211
 212 static int
 213 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
 214                         vlc_value_t oldval, vlc_value_t newval,
 215                         void * p_userdata )
 216 {
 217     VLC_UNUSED(oldval);
 218     VLC_UNUSED(p_this);
 219     VLC_UNUSED(psz_cmd);
 220     libvlc_media_player_t * p_mi = p_userdata;
 221     libvlc_event_t event;
 222
 223     event.type = libvlc_MediaPlayerPausableChanged;
 224     event.u.media_player_pausable_changed.new_pausable = newval.b_bool;
 225
 226     libvlc_event_send( p_mi->p_event_manager, &event );
 227     return VLC_SUCCESS;
 228 }
 229
 230 static int
 231 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
 232                      vlc_value_t oldval, vlc_value_t newval,
 233                      void * p_userdata )
 234 {
 235     VLC_UNUSED(oldval);
 236     input_thread_t * p_input = (input_thread_t *)p_this;
 237     libvlc_media_player_t * p_mi = p_userdata;
 238     libvlc_event_t event;
 239
 240     assert( !strcmp( psz_cmd, "intf-event" ) );
 241
 242     if( newval.i_int == INPUT_EVENT_STATE )
 243     {
 244         libvlc_state_t libvlc_state;
 245
 246         switch ( var_GetInteger( p_input, "state" ) )
 247         {
 248             case INIT_S:
 249                 libvlc_state = libvlc_NothingSpecial;
 250                 event.type = libvlc_MediaPlayerNothingSpecial;
 251                 break;
 252             case OPENING_S:
 253                 libvlc_state = libvlc_Opening;
 254                 event.type = libvlc_MediaPlayerOpening;
 255                 break;
 256             case PLAYING_S:
 257                 libvlc_state = libvlc_Playing;
 258                 event.type = libvlc_MediaPlayerPlaying;
 259                 break;
 260             case PAUSE_S:
 261                 libvlc_state = libvlc_Paused;
 262                 event.type = libvlc_MediaPlayerPaused;
 263                 break;
 264             case END_S:
 265                 libvlc_state = libvlc_Ended;
 266                 event.type = libvlc_MediaPlayerEndReached;
 267                 break;
 268             case ERROR_S:
 269                 libvlc_state = libvlc_Error;
 270                 event.type = libvlc_MediaPlayerEncounteredError;
 271                 break;
 272
 273             default:
 274                 return VLC_SUCCESS;
 275         }
 276
 277         set_state( p_mi, libvlc_state, false );
 278         libvlc_event_send( p_mi->p_event_manager, &event );
 279     }
 280     else if( newval.i_int == INPUT_EVENT_ABORT )
 281     {
 282         libvlc_state_t libvlc_state = libvlc_Stopped;
 283         event.type = libvlc_MediaPlayerStopped;
 284
 285         set_state( p_mi, libvlc_state, false );
 286         libvlc_event_send( p_mi->p_event_manager, &event );
 287     }
 288     else if( newval.i_int == INPUT_EVENT_POSITION )
 289     {
 290         if( var_GetInteger( p_input, "state" ) != PLAYING_S )
 291             return VLC_SUCCESS; /* Don't send the position while stopped */
 292
 293         /* */
 294         event.type = libvlc_MediaPlayerPositionChanged;
 295         event.u.media_player_position_changed.new_position =
 296                                           var_GetFloat( p_input, "position" );
 297         libvlc_event_send( p_mi->p_event_manager, &event );
 298
 299         /* */
 300         event.type = libvlc_MediaPlayerTimeChanged;
 301         event.u.media_player_time_changed.new_time =
 302            from_mtime(var_GetTime( p_input, "time" ));
 303         libvlc_event_send( p_mi->p_event_manager, &event );
 304     }
 305     else if( newval.i_int == INPUT_EVENT_LENGTH )
 306     {
 307         event.type = libvlc_MediaPlayerLengthChanged;
 308         event.u.media_player_length_changed.new_length =
 309            from_mtime(var_GetTime( p_input, "length" ));
 310         libvlc_event_send( p_mi->p_event_manager, &event );
 311     }
 312     else if( newval.i_int == INPUT_EVENT_CACHE )
 313     {
 314         event.type = libvlc_MediaPlayerBuffering;
 315         event.u.media_player_buffering.new_cache = (int)(100 *
 316             var_GetFloat( p_input, "cache" ));
 317         libvlc_event_send( p_mi->p_event_manager, &event );
 318     }
 319
 320     return VLC_SUCCESS;
 321 }
 322
 323 /**************************************************************************
 324  * Snapshot Taken Event.
 325  *
 326  * FIXME: This snapshot API interface makes no sense in media_player.
 327  *************************************************************************/
 328 static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd,
 329                               vlc_value_t oldval, vlc_value_t newval, void *p_data )
 330 {
 331     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_this);
 332
 333     libvlc_media_player_t *mp = p_data;
 334     libvlc_event_t event;
 335     event.type = libvlc_MediaPlayerSnapshotTaken;
 336     event.u.media_player_snapshot_taken.psz_filename = newval.psz_string;
 337     libvlc_event_send(mp->p_event_manager, &event);
 338
 339     return VLC_SUCCESS;
 340 }
 341
 342 static input_thread_t *find_input (vlc_object_t *obj)
 343 {
 344     libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;
 345
 346     return libvlc_get_input_thread (mp);
 347 }
 348
 349 /* */
 350 static void libvlc_media_player_destroy( libvlc_media_player_t * );
 351
 352
 353 /**************************************************************************
 354  * Create a Media Instance object.
 355  *
 356  * Refcount strategy:
 357  * - All items created by _new start with a refcount set to 1.
 358  * - Accessor _release decrease the refcount by 1, if after that
 359  *   operation the refcount is 0, the object is destroyed.
 360  * - Accessor _retain increase the refcount by 1 (XXX: to implement)
 361  *
 362  * Object locking strategy:
 363  * - No lock held while in constructor.
 364  * - When accessing any member variable this lock is held. (XXX who locks?)
 365  * - When attempting to destroy the object the lock is also held.
 366  **************************************************************************/
 367 libvlc_media_player_t *
 368 libvlc_media_player_new( libvlc_instance_t *instance )
 369 {
 370     libvlc_media_player_t * mp;
 371
 372     assert(instance);
 373
 374     mp = vlc_object_create (instance->p_libvlc_int, sizeof(*mp));
 375     if (unlikely(mp == NULL))
 376     {
 377         libvlc_printerr("Not enough memory");
 378         return NULL;
 379     }
 380
 381     /* Input */
 382     var_Create (mp, "rate", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT);
 383
 384     /* Video */
 385     var_Create (mp, "vout", VLC_VAR_STRING|VLC_VAR_DOINHERIT);
 386     var_Create (mp, "window", VLC_VAR_STRING);
 387     var_Create (mp, "vmem-lock", VLC_VAR_ADDRESS);
 388     var_Create (mp, "vmem-unlock", VLC_VAR_ADDRESS);
 389     var_Create (mp, "vmem-display", VLC_VAR_ADDRESS);
 390     var_Create (mp, "vmem-data", VLC_VAR_ADDRESS);
 391     var_Create (mp, "vmem-setup", VLC_VAR_ADDRESS);
 392     var_Create (mp, "vmem-cleanup", VLC_VAR_ADDRESS);
 393     var_Create (mp, "vmem-chroma", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 394     var_Create (mp, "vmem-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 395     var_Create (mp, "vmem-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 396     var_Create (mp, "vmem-pitch", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 397     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 398 #ifdef WIN32
 399     var_Create (mp, "drawable-hwnd", VLC_VAR_INTEGER);
 400 #endif
 401 #ifdef __APPLE__
 402     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 403     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 404 #endif
 405
 406     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 407     var_SetBool (mp, "keyboard-events", true);
 408     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 409     var_SetBool (mp, "mouse-events", true);
 410
 411     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 412     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 413     var_SetBool (mp, "autoscale", true);
 414     var_Create (mp, "scale", VLC_VAR_FLOAT);
 415     var_SetFloat (mp, "scale", 1.);
 416     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 417     var_Create (mp, "crop", VLC_VAR_STRING);
 418     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 419     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 420
 421     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 422
 423     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 424     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 425     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 426     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 427     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 428     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 429     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 430     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 431     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 432
 433     var_Create (mp, "logo-file", VLC_VAR_STRING);
 434     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 435     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 436     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 437     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 438     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 439     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 440
 441     var_Create (mp, "contrast", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 442     var_Create (mp, "brightness", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 443     var_Create (mp, "hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 444     var_Create (mp, "saturation", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 445     var_Create (mp, "gamma", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 446
 447      /* Audio */
 448     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 449     var_Create (mp, "mute", VLC_VAR_BOOL);
 450     var_Create (mp, "volume", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 451     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 452     var_SetAddress (mp, "find-input-callback", find_input);
 453     var_Create (mp, "amem-data", VLC_VAR_ADDRESS);
 454     var_Create (mp, "amem-setup", VLC_VAR_ADDRESS);
 455     var_Create (mp, "amem-close", VLC_VAR_ADDRESS);
 456     var_Create (mp, "amem-play", VLC_VAR_ADDRESS);
 457     var_Create (mp, "amem-pause", VLC_VAR_ADDRESS);
 458     var_Create (mp, "amem-resume", VLC_VAR_ADDRESS);
 459     var_Create (mp, "amem-flush", VLC_VAR_ADDRESS);
 460     var_Create (mp, "amem-drain", VLC_VAR_ADDRESS);
 461     var_Create (mp, "amem-set-volume", VLC_VAR_ADDRESS);
 462     var_Create (mp, "amem-format", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 463     var_Create (mp, "amem-rate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 464     var_Create (mp, "amem-channels", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 465
 466     mp->p_md = NULL;
 467     mp->state = libvlc_NothingSpecial;
 468     mp->p_libvlc_instance = instance;
 469     mp->input.p_thread = NULL;
 470     mp->input.p_resource = NULL;
 471     vlc_mutex_init (&mp->input.lock);
 472     mp->i_refcount = 1;
 473     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 474     if (unlikely(mp->p_event_manager == NULL))
 475     {
 476         vlc_object_release(mp);
 477         return NULL;
 478     }
 479     vlc_mutex_init(&mp->object_lock);
 480
 481     register_event(mp, NothingSpecial);
 482     register_event(mp, Opening);
 483     register_event(mp, Buffering);
 484     register_event(mp, Playing);
 485     register_event(mp, Paused);
 486     register_event(mp, Stopped);
 487     register_event(mp, Forward);
 488     register_event(mp, Backward);
 489     register_event(mp, EndReached);
 490     register_event(mp, EncounteredError);
 491     register_event(mp, SeekableChanged);
 492
 493     register_event(mp, PositionChanged);
 494     register_event(mp, TimeChanged);
 495     register_event(mp, LengthChanged);
 496     register_event(mp, TitleChanged);
 497     register_event(mp, PausableChanged);
 498
 499     /* Snapshot initialization */
 500     register_event(mp, SnapshotTaken);
 501
 502     register_event(mp, MediaChanged);
 503
 504     /* Attach a var callback to the global object to provide the glue between
 505      * vout_thread that generates the event and media_player that re-emits it
 506      * with its own event manager
 507      *
 508      * FIXME: It's unclear why we want to put this in public API, and why we
 509      * want to expose it in such a limiting and ugly way.
 510      */
 511     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 512
 513     libvlc_retain(instance);
 514     return mp;
 515 }
 516
 517 /**************************************************************************
 518  * Create a Media Instance object with a media descriptor.
 519  **************************************************************************/
 520 libvlc_media_player_t *
 521 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 522 {
 523     libvlc_media_player_t * p_mi;
 524
 525     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 526     if( !p_mi )
 527         return NULL;
 528
 529     libvlc_media_retain( p_md );
 530     p_mi->p_md = p_md;
 531
 532     return p_mi;
 533 }
 534
 535 /**************************************************************************
 536  * Destroy a Media Instance object (libvlc internal)
 537  *
 538  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 539  **************************************************************************/
 540 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 541 {
 542     assert( p_mi );
 543
 544     /* Detach Callback from the main libvlc object */
 545     var_DelCallback( p_mi->p_libvlc,
 546                      "snapshot-file", snapshot_was_taken, p_mi );
 547
 548     /* No need for lock_input() because no other threads knows us anymore */
 549     if( p_mi->input.p_thread )
 550         release_input_thread(p_mi, true);
 551     if( p_mi->input.p_resource )
 552     {
 553         input_resource_Terminate( p_mi->input.p_resource );
 554         input_resource_Release( p_mi->input.p_resource );
 555         p_mi->input.p_resource = NULL;
 556     }
 557     vlc_mutex_destroy( &p_mi->input.lock );
 558
 559     libvlc_event_manager_release( p_mi->p_event_manager );
 560     libvlc_media_release( p_mi->p_md );
 561     vlc_mutex_destroy( &p_mi->object_lock );
 562
 563     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 564     vlc_object_release( p_mi );
 565     libvlc_release(instance);
 566 }
 567
 568 /**************************************************************************
 569  * Release a Media Instance object.
 570  *
 571  * Function does the locking.
 572  **************************************************************************/
 573 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 574 {
 575     bool destroy;
 576
 577     assert( p_mi );
 578     lock(p_mi);
 579     destroy = !--p_mi->i_refcount;
 580     unlock(p_mi);
 581
 582     if( destroy )
 583         libvlc_media_player_destroy( p_mi );
 584 }
 585
 586 /**************************************************************************
 587  * Retain a Media Instance object.
 588  *
 589  * Caller must hold the lock.
 590  **************************************************************************/
 591 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 592 {
 593     assert( p_mi );
 594
 595     lock(p_mi);
 596     p_mi->i_refcount++;
 597     unlock(p_mi);
 598 }
 599
 600 /**************************************************************************
 601  * Set the Media descriptor associated with the instance.
 602  *
 603  * Enter without lock -- function will lock the object.
 604  **************************************************************************/
 605 void libvlc_media_player_set_media(
 606                             libvlc_media_player_t *p_mi,
 607                             libvlc_media_t *p_md )
 608 {
 609     lock_input(p_mi);
 610
 611     /* FIXME I am not sure if it is a user request or on die(eof/error)
 612      * request here */
 613     release_input_thread( p_mi,
 614                           p_mi->input.p_thread &&
 615                           !p_mi->input.p_thread->b_eof &&
 616                           !p_mi->input.p_thread->b_error );
 617
 618     lock( p_mi );
 619     set_state( p_mi, libvlc_NothingSpecial, true );
 620     unlock_input( p_mi );
 621
 622     libvlc_media_release( p_mi->p_md );
 623
 624     if( !p_md )
 625     {
 626         p_mi->p_md = NULL;
 627         unlock(p_mi);
 628         return; /* It is ok to pass a NULL md */
 629     }
 630
 631     libvlc_media_retain( p_md );
 632     p_mi->p_md = p_md;
 633
 634     /* The policy here is to ignore that we were created using a different
 635      * libvlc_instance, because we don't really care */
 636     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 637
 638     unlock(p_mi);
 639
 640     /* Send an event for the newly available media */
 641     libvlc_event_t event;
 642     event.type = libvlc_MediaPlayerMediaChanged;
 643     event.u.media_player_media_changed.new_media = p_md;
 644     libvlc_event_send( p_mi->p_event_manager, &event );
 645
 646 }
 647
 648 /**************************************************************************
 649  * Get the Media descriptor associated with the instance.
 650  **************************************************************************/
 651 libvlc_media_t *
 652 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 653 {
 654     libvlc_media_t *p_m;
 655
 656     lock(p_mi);
 657     p_m = p_mi->p_md;
 658     if( p_m )
 659         libvlc_media_retain( p_mi->p_md );
 660     unlock(p_mi);
 661     return p_mi->p_md;
 662 }
 663
 664 /**************************************************************************
 665  * Get the event Manager.
 666  **************************************************************************/
 667 libvlc_event_manager_t *
 668 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 669 {
 670     return p_mi->p_event_manager;
 671 }
 672
 673 /**************************************************************************
 674  * Tell media player to start playing.
 675  **************************************************************************/
 676 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 677 {
 678     lock_input( p_mi );
 679
 680     input_thread_t *p_input_thread = p_mi->input.p_thread;
 681     if( p_input_thread )
 682     {
 683         /* A thread already exists, send it a play message */
 684         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 685         unlock_input( p_mi );
 686         return 0;
 687     }
 688
 689     /* Ignore previous exception */
 690     lock(p_mi);
 691
 692     if( !p_mi->p_md )
 693     {
 694         unlock(p_mi);
 695         unlock_input( p_mi );
 696         libvlc_printerr( "No associated media descriptor" );
 697         return -1;
 698     }
 699
 700     if( !p_mi->input.p_resource )
 701         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 702     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 703                                    p_mi->input.p_resource );
 704     unlock(p_mi);
 705     if( !p_input_thread )
 706     {
 707         unlock_input(p_mi);
 708         libvlc_printerr( "Not enough memory" );
 709         return -1;
 710     }
 711
 712     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 713     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 714     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 715
 716     if( input_Start( p_input_thread ) )
 717     {
 718         unlock_input(p_mi);
 719         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 720         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 721         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 722         vlc_object_release( p_input_thread );
 723         libvlc_printerr( "Input initialization failure" );
 724         return -1;
 725     }
 726     p_mi->input.p_thread = p_input_thread;
 727     unlock_input(p_mi);
 728     return 0;
 729 }
 730
 731 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 732 {
 733     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 734     if( !p_input_thread )
 735         return;
 736
 737     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 738     if( state == libvlc_Playing || state == libvlc_Buffering )
 739     {
 740         if( paused )
 741         {
 742             if( libvlc_media_player_can_pause( p_mi ) )
 743                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 744             else
 745                 libvlc_media_player_stop( p_mi );
 746         }
 747     }
 748     else
 749     {
 750         if( !paused )
 751             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 752     }
 753
 754     vlc_object_release( p_input_thread );
 755 }
 756
 757 /**************************************************************************
 758  * Toggle pause.
 759  **************************************************************************/
 760 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 761 {
 762     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 763     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 764
 765     libvlc_media_player_set_pause( p_mi, playing );
 766 }
 767
 768 /**************************************************************************
 769  * Tells whether the media player is currently playing.
 770  *
 771  * Enter with lock held.
 772  **************************************************************************/
 773 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 774 {
 775     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 776     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 777 }
 778
 779 /**************************************************************************
 780  * Stop playing.
 781  **************************************************************************/
 782 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 783 {
 784     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 785
 786     lock_input(p_mi);
 787     release_input_thread( p_mi, true ); /* This will stop the input thread */
 788
 789     /* Force to go to stopped state, in case we were in Ended, or Error
 790      * state. */
 791     if( state != libvlc_Stopped )
 792     {
 793         set_state( p_mi, libvlc_Stopped, false );
 794
 795         /* Construct and send the event */
 796         libvlc_event_t event;
 797         event.type = libvlc_MediaPlayerStopped;
 798         libvlc_event_send( p_mi->p_event_manager, &event );
 799     }
 800
 801     if( p_mi->input.p_resource != NULL )
 802         input_resource_Terminate( p_mi->input.p_resource );
 803     unlock_input(p_mi);
 804 }
 805
 806
 807 void libvlc_video_set_callbacks( libvlc_media_player_t *mp,
 808     void *(*lock_cb) (void *, void **),
 809     void (*unlock_cb) (void *, void *, void *const *),
 810     void (*display_cb) (void *, void *),
 811     void *opaque )
 812 {
 813     var_SetAddress( mp, "vmem-lock", lock_cb );
 814     var_SetAddress( mp, "vmem-unlock", unlock_cb );
 815     var_SetAddress( mp, "vmem-display", display_cb );
 816     var_SetAddress( mp, "vmem-data", opaque );
 817     var_SetString( mp, "vout", "vmem" );
 818 }
 819
 820 void libvlc_video_set_format_callbacks( libvlc_media_player_t *mp,
 821                                         libvlc_video_format_cb setup,
 822                                         libvlc_video_cleanup_cb cleanup )
 823 {
 824     var_SetAddress( mp, "vmem-setup", setup );
 825     var_SetAddress( mp, "vmem-cleanup", cleanup );
 826 }
 827
 828 void libvlc_video_set_format( libvlc_media_player_t *mp, const char *chroma,
 829                               unsigned width, unsigned height, unsigned pitch )
 830 {
 831     var_SetString( mp, "vmem-chroma", chroma );
 832     var_SetInteger( mp, "vmem-width", width );
 833     var_SetInteger( mp, "vmem-height", height );
 834     var_SetInteger( mp, "vmem-pitch", pitch );
 835 }
 836
 837 /**************************************************************************
 838  * set_nsobject
 839  **************************************************************************/
 840 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 841                                         void * drawable )
 842 {
 843     assert (p_mi != NULL);
 844 #ifdef __APPLE__
 845     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 846 #else
 847     (void) p_mi; (void)drawable;
 848 #endif
 849 }
 850
 851 /**************************************************************************
 852  * get_nsobject
 853  **************************************************************************/
 854 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 855 {
 856     assert (p_mi != NULL);
 857 #ifdef __APPLE__
 858     return var_GetAddress (p_mi, "drawable-nsobject");
 859 #else
 860     return NULL;
 861 #endif
 862 }
 863
 864 /**************************************************************************
 865  * set_agl
 866  **************************************************************************/
 867 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 868                                   uint32_t drawable )
 869 {
 870 #ifdef __APPLE__
 871     var_SetInteger (p_mi, "drawable-agl", drawable);
 872 #else
 873     (void) p_mi; (void)drawable;
 874 #endif
 875 }
 876
 877 /**************************************************************************
 878  * get_agl
 879  **************************************************************************/
 880 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 881 {
 882     assert (p_mi != NULL);
 883 #ifdef __APPLE__
 884     return var_GetInteger (p_mi, "drawable-agl");
 885 #else
 886     return 0;
 887 #endif
 888 }
 889
 890 /**************************************************************************
 891  * set_xwindow
 892  **************************************************************************/
 893 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 894                                       uint32_t drawable )
 895 {
 896     assert (p_mi != NULL);
 897
 898     var_SetString (p_mi, "vout", drawable ? "xid" : "any");
 899     var_SetString (p_mi, "window", drawable ? "embed-xid,any" : "any");
 900     var_SetInteger (p_mi, "drawable-xid", drawable);
 901 }
 902
 903 /**************************************************************************
 904  * get_xwindow
 905  **************************************************************************/
 906 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 907 {
 908     return var_GetInteger (p_mi, "drawable-xid");
 909 }
 910
 911 /**************************************************************************
 912  * set_hwnd
 913  **************************************************************************/
 914 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 915                                    void *drawable )
 916 {
 917     assert (p_mi != NULL);
 918 #ifdef WIN32
 919     var_SetString (p_mi, "window",
 920                    (drawable != NULL) ? "embed-hwnd,any" : "");
 921     var_SetInteger (p_mi, "drawable-hwnd", (uintptr_t)drawable);
 922 #else
 923     (void) p_mi; (void) drawable;
 924 #endif
 925 }
 926
 927 /**************************************************************************
 928  * get_hwnd
 929  **************************************************************************/
 930 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 931 {
 932     assert (p_mi != NULL);
 933 #ifdef WIN32
 934     return (void *)(uintptr_t)var_GetInteger (p_mi, "drawable-hwnd");
 935 #else
 936     return NULL;
 937 #endif
 938 }
 939
 940 void libvlc_audio_set_callbacks( libvlc_media_player_t *mp,
 941                                  libvlc_audio_play_cb play_cb,
 942                                  libvlc_audio_pause_cb pause_cb,
 943                                  libvlc_audio_resume_cb resume_cb,
 944                                  libvlc_audio_flush_cb flush_cb,
 945                                  libvlc_audio_drain_cb drain_cb,
 946                                  void *opaque )
 947 {
 948     var_SetAddress( mp, "amem-play", play_cb );
 949     var_SetAddress( mp, "amem-pause", pause_cb );
 950     var_SetAddress( mp, "amem-resume", resume_cb );
 951     var_SetAddress( mp, "amem-flush", flush_cb );
 952     var_SetAddress( mp, "amem-drain", drain_cb );
 953     var_SetAddress( mp, "amem-data", opaque );
 954     var_SetString( mp, "aout", "amem,none" );
 955 }
 956
 957 void libvlc_audio_set_volume_callback( libvlc_media_player_t *mp,
 958                                        libvlc_audio_set_volume_cb cb )
 959 {
 960     var_SetAddress( mp, "amem-set-volume", cb );
 961 }
 962
 963 void libvlc_audio_set_format_callbacks( libvlc_media_player_t *mp,
 964                                         libvlc_audio_setup_cb setup,
 965                                         libvlc_audio_cleanup_cb cleanup )
 966 {
 967     var_SetAddress( mp, "amem-setup", setup );
 968     var_SetAddress( mp, "amem-cleanup", cleanup );
 969 }
 970
 971 void libvlc_audio_set_format( libvlc_media_player_t *mp, const char *format,
 972                               unsigned rate, unsigned channels )
 973 {
 974     var_SetString( mp, "amem-format", format );
 975     var_SetInteger( mp, "amem-rate", rate );
 976     var_SetInteger( mp, "amem-channels", channels );
 977 }
 978
 979
 980 /**************************************************************************
 981  * Getters for stream information
 982  **************************************************************************/
 983 libvlc_time_t libvlc_media_player_get_length(
 984                              libvlc_media_player_t *p_mi )
 985 {
 986     input_thread_t *p_input_thread;
 987     libvlc_time_t i_time;
 988
 989     p_input_thread = libvlc_get_input_thread ( p_mi );
 990     if( !p_input_thread )
 991         return -1;
 992
 993     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 994     vlc_object_release( p_input_thread );
 995
 996     return i_time;
 997 }
 998
 999 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
1000 {
1001     input_thread_t *p_input_thread;
1002     libvlc_time_t i_time;
1003
1004     p_input_thread = libvlc_get_input_thread ( p_mi );
1005     if( !p_input_thread )
1006         return -1;
1007
1008     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
1009     vlc_object_release( p_input_thread );
1010     return i_time;
1011 }
1012
1013 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
1014                                    libvlc_time_t i_time )
1015 {
1016     input_thread_t *p_input_thread;
1017
1018     p_input_thread = libvlc_get_input_thread ( p_mi );
1019     if( !p_input_thread )
1020         return;
1021
1022     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
1023     vlc_object_release( p_input_thread );
1024 }
1025
1026 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
1027                                        float position )
1028 {
1029     input_thread_t *p_input_thread;
1030
1031     p_input_thread = libvlc_get_input_thread ( p_mi );
1032     if( !p_input_thread )
1033         return;
1034
1035     var_SetFloat( p_input_thread, "position", position );
1036     vlc_object_release( p_input_thread );
1037 }
1038
1039 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
1040 {
1041     input_thread_t *p_input_thread;
1042     float f_position;
1043
1044     p_input_thread = libvlc_get_input_thread ( p_mi );
1045     if( !p_input_thread )
1046         return -1.0;
1047
1048     f_position = var_GetFloat( p_input_thread, "position" );
1049     vlc_object_release( p_input_thread );
1050
1051     return f_position;
1052 }
1053
1054 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
1055                                       int chapter )
1056 {
1057     input_thread_t *p_input_thread;
1058
1059     p_input_thread = libvlc_get_input_thread ( p_mi );
1060     if( !p_input_thread )
1061         return;
1062
1063     var_SetInteger( p_input_thread, "chapter", chapter );
1064     vlc_object_release( p_input_thread );
1065 }
1066
1067 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
1068 {
1069     input_thread_t *p_input_thread;
1070     int i_chapter;
1071
1072     p_input_thread = libvlc_get_input_thread ( p_mi );
1073     if( !p_input_thread )
1074         return -1;
1075
1076     i_chapter = var_GetInteger( p_input_thread, "chapter" );
1077     vlc_object_release( p_input_thread );
1078
1079     return i_chapter;
1080 }
1081
1082 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
1083 {
1084     input_thread_t *p_input_thread;
1085     vlc_value_t val;
1086
1087     p_input_thread = libvlc_get_input_thread ( p_mi );
1088     if( !p_input_thread )
1089         return -1;
1090
1091     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
1092     vlc_object_release( p_input_thread );
1093
1094     return val.i_int;
1095 }
1096
1097 int libvlc_media_player_get_chapter_count_for_title(
1098                                  libvlc_media_player_t *p_mi,
1099                                  int i_title )
1100 {
1101     input_thread_t *p_input_thread;
1102     vlc_value_t val;
1103
1104     p_input_thread = libvlc_get_input_thread ( p_mi );
1105     if( !p_input_thread )
1106         return -1;
1107
1108     char *psz_name;
1109     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
1110     {
1111         vlc_object_release( p_input_thread );
1112         return -1;
1113     }
1114     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1115     vlc_object_release( p_input_thread );
1116     free( psz_name );
1117
1118     return val.i_int;
1119 }
1120
1121 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1122                                     int i_title )
1123 {
1124     input_thread_t *p_input_thread;
1125
1126     p_input_thread = libvlc_get_input_thread ( p_mi );
1127     if( !p_input_thread )
1128         return;
1129
1130     var_SetInteger( p_input_thread, "title", i_title );
1131     vlc_object_release( p_input_thread );
1132
1133     //send event
1134     libvlc_event_t event;
1135     event.type = libvlc_MediaPlayerTitleChanged;
1136     event.u.media_player_title_changed.new_title = i_title;
1137     libvlc_event_send( p_mi->p_event_manager, &event );
1138 }
1139
1140 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1141 {
1142     input_thread_t *p_input_thread;
1143     int i_title;
1144
1145     p_input_thread = libvlc_get_input_thread ( p_mi );
1146     if( !p_input_thread )
1147         return -1;
1148
1149     i_title = var_GetInteger( p_input_thread, "title" );
1150     vlc_object_release( p_input_thread );
1151
1152     return i_title;
1153 }
1154
1155 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1156 {
1157     input_thread_t *p_input_thread;
1158     vlc_value_t val;
1159
1160     p_input_thread = libvlc_get_input_thread ( p_mi );
1161     if( !p_input_thread )
1162         return -1;
1163
1164     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1165     vlc_object_release( p_input_thread );
1166
1167     return val.i_int;
1168 }
1169
1170 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1171 {
1172     input_thread_t *p_input_thread;
1173
1174     p_input_thread = libvlc_get_input_thread ( p_mi );
1175     if( !p_input_thread )
1176         return;
1177
1178     int i_type = var_Type( p_input_thread, "next-chapter" );
1179     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1180                             "next-chapter":"next-title" );
1181
1182     vlc_object_release( p_input_thread );
1183 }
1184
1185 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1186 {
1187     input_thread_t *p_input_thread;
1188
1189     p_input_thread = libvlc_get_input_thread ( p_mi );
1190     if( !p_input_thread )
1191         return;
1192
1193     int i_type = var_Type( p_input_thread, "next-chapter" );
1194     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1195                             "prev-chapter":"prev-title" );
1196
1197     vlc_object_release( p_input_thread );
1198 }
1199
1200 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1201 {
1202     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1203     double f_fps = 0.0;
1204
1205     if( p_input_thread )
1206     {
1207         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1208             f_fps = 0.0;
1209         vlc_object_release( p_input_thread );
1210     }
1211     return f_fps;
1212 }
1213
1214 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1215 {
1216     bool b_will_play;
1217     input_thread_t *p_input_thread =
1218                             libvlc_get_input_thread ( p_mi );
1219     if ( !p_input_thread )
1220         return false;
1221
1222     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1223     vlc_object_release( p_input_thread );
1224
1225     return b_will_play;
1226 }
1227
1228 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1229 {
1230     if (rate < 0.)
1231     {
1232         libvlc_printerr ("Playing backward not supported");
1233         return -1;
1234     }
1235
1236     var_SetFloat (p_mi, "rate", rate);
1237
1238     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1239     if( !p_input_thread )
1240         return 0;
1241     var_SetFloat( p_input_thread, "rate", rate );
1242     vlc_object_release( p_input_thread );
1243     return 0;
1244 }
1245
1246 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1247 {
1248     return var_GetFloat (p_mi, "rate");
1249 }
1250
1251 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1252 {
1253     lock(p_mi);
1254     libvlc_state_t state = p_mi->state;
1255     unlock(p_mi);
1256     return state;
1257 }
1258
1259 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1260 {
1261     input_thread_t *p_input_thread;
1262     bool b_seekable;
1263
1264     p_input_thread = libvlc_get_input_thread ( p_mi );
1265     if ( !p_input_thread )
1266         return false;
1267     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1268     vlc_object_release( p_input_thread );
1269
1270     return b_seekable;
1271 }
1272
1273 void libvlc_media_player_navigate( libvlc_media_player_t* p_mi,
1274                                    unsigned navigate )
1275 {
1276     input_thread_t *p_input_thread;
1277
1278     if ( navigate > libvlc_navigate_to_action_size)
1279       return;
1280
1281     p_input_thread = libvlc_get_input_thread ( p_mi );
1282     if ( !p_input_thread )
1283       return;
1284
1285     var_SetInteger( p_mi->p_libvlc_instance->p_libvlc_int,
1286                     "key-action", libvlc_navigate_to_action[navigate] );
1287
1288     vlc_object_release( p_input_thread );
1289 }
1290
1291 /* internal function, used by audio, video */
1292 libvlc_track_description_t *
1293         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1294                                       const char *psz_variable )
1295 {
1296     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1297     libvlc_track_description_t *p_track_description = NULL,
1298                                *p_actual, *p_previous;
1299
1300     if( !p_input )
1301         return NULL;
1302
1303     vlc_value_t val_list, text_list;
1304     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1305
1306     /* no tracks */
1307     if( val_list.p_list->i_count <= 0 )
1308         goto end;
1309
1310     p_track_description = ( libvlc_track_description_t * )
1311         malloc( sizeof( libvlc_track_description_t ) );
1312     if ( !p_track_description )
1313     {
1314         libvlc_printerr( "Not enough memory" );
1315         goto end;
1316     }
1317     p_actual = p_track_description;
1318     p_previous = NULL;
1319     for( int i = 0; i < val_list.p_list->i_count; i++ )
1320     {
1321         if( !p_actual )
1322         {
1323             p_actual = ( libvlc_track_description_t * )
1324                 malloc( sizeof( libvlc_track_description_t ) );
1325             if ( !p_actual )
1326             {
1327                 libvlc_track_description_release( p_track_description );
1328                 libvlc_printerr( "Not enough memory" );
1329                 goto end;
1330             }
1331         }
1332         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1333         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1334         p_actual->p_next = NULL;
1335         if( p_previous )
1336             p_previous->p_next = p_actual;
1337         p_previous = p_actual;
1338         p_actual =  NULL;
1339     }
1340
1341 end:
1342     var_FreeList( &val_list, &text_list );
1343     vlc_object_release( p_input );
1344
1345     return p_track_description;
1346 }
1347
1348 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1349 {
1350     libvlc_track_description_t *p_actual, *p_before;
1351     p_actual = p_td;
1352
1353     while ( p_actual )
1354     {
1355         free( p_actual->psz_name );
1356         p_before = p_actual;
1357         p_actual = p_before->p_next;
1358         free( p_before );
1359     }
1360 }
1361
1362 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1363 {
1364     input_thread_t *p_input_thread;
1365     bool b_can_pause;
1366
1367     p_input_thread = libvlc_get_input_thread ( p_mi );
1368     if ( !p_input_thread )
1369         return false;
1370     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1371     vlc_object_release( p_input_thread );
1372
1373     return b_can_pause;
1374 }
1375
1376 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1377 {
1378     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1379     if( p_input_thread != NULL )
1380     {
1381         var_TriggerCallback( p_input_thread, "frame-next" );
1382         vlc_object_release( p_input_thread );
1383     }
1384 }