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) 2005-2011 VLC authors and VideoLAN
   5  *
   6  * Authors: Clément Stenac <zorglub@videolan.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 #ifdef HAVE_CONFIG_H
  24 # include "config.h"
  25 #endif
  26
  27 #include <assert.h>
  28
  29 #include <vlc/libvlc.h>
  30 #include <vlc/libvlc_media.h>
  31 #include <vlc/libvlc_events.h>
  32
  33 #include <vlc_demux.h>
  34 #include <vlc_input.h>
  35 #include <vlc_vout.h>
  36 #include <vlc_keys.h>
  37
  38 #include "libvlc_internal.h"
  39 #include "media_internal.h" // libvlc_media_set_state()
  40 #include "media_player_internal.h"
  41
  42 static int
  43 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
  44                         vlc_value_t oldval, vlc_value_t newval,
  45                         void * p_userdata );
  46 static int
  47 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
  48                         vlc_value_t oldval, vlc_value_t newval,
  49                         void * p_userdata );
  50 static int
  51 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
  52                      vlc_value_t oldval, vlc_value_t newval,
  53                      void * p_userdata );
  54
  55 static int
  56 snapshot_was_taken( vlc_object_t *p_this, char const *psz_cmd,
  57                     vlc_value_t oldval, vlc_value_t newval, void *p_data );
  58
  59 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi );
  60
  61 /*
  62  * Shortcuts
  63  */
  64
  65 #define register_event(a, b) __register_event(a, libvlc_MediaPlayer ## b)
  66 static inline void __register_event(libvlc_media_player_t *mp, libvlc_event_type_t type)
  67 {
  68     libvlc_event_manager_register_event_type(mp->p_event_manager, type);
  69 }
  70
  71 /*
  72  * The input lock protects the input and input resource pointer.
  73  * It MUST NOT be used from callbacks.
  74  *
  75  * The object lock protects the reset, namely the media and the player state.
  76  * It can, and usually needs to be taken from callbacks.
  77  * The object lock can be acquired under the input lock... and consequently
  78  * the opposite order is STRICTLY PROHIBITED.
  79  */
  80 static inline void lock(libvlc_media_player_t *mp)
  81 {
  82     vlc_mutex_lock(&mp->object_lock);
  83 }
  84
  85 static inline void unlock(libvlc_media_player_t *mp)
  86 {
  87     vlc_mutex_unlock(&mp->object_lock);
  88 }
  89
  90 static inline void lock_input(libvlc_media_player_t *mp)
  91 {
  92     vlc_mutex_lock(&mp->input.lock);
  93 }
  94
  95 static inline void unlock_input(libvlc_media_player_t *mp)
  96 {
  97     vlc_mutex_unlock(&mp->input.lock);
  98 }
  99
 100 /*
 101  * Release the associated input thread.
 102  *
 103  * Object lock is NOT held.
 104  * Input lock is held or instance is being destroyed.
 105  */
 106 static void release_input_thread( libvlc_media_player_t *p_mi, bool b_input_abort )
 107 {
 108     assert( p_mi );
 109
 110     input_thread_t *p_input_thread = p_mi->input.p_thread;
 111     if( !p_input_thread )
 112         return;
 113     p_mi->input.p_thread = NULL;
 114
 115     var_DelCallback( p_input_thread, "can-seek",
 116                      input_seekable_changed, p_mi );
 117     var_DelCallback( p_input_thread, "can-pause",
 118                     input_pausable_changed, p_mi );
 119     var_DelCallback( p_input_thread, "intf-event",
 120                      input_event_changed, p_mi );
 121
 122     /* We owned this one */
 123     input_Stop( p_input_thread, b_input_abort );
 124     input_Close( p_input_thread );
 125 }
 126
 127 /*
 128  * Retrieve the input thread. Be sure to release the object
 129  * once you are done with it. (libvlc Internal)
 130  */
 131 input_thread_t *libvlc_get_input_thread( libvlc_media_player_t *p_mi )
 132 {
 133     input_thread_t *p_input_thread;
 134
 135     assert( p_mi );
 136
 137     lock_input(p_mi);
 138     p_input_thread = p_mi->input.p_thread;
 139     if( p_input_thread )
 140         vlc_object_hold( p_input_thread );
 141     else
 142         libvlc_printerr( "No active input" );
 143     unlock_input(p_mi);
 144
 145     return p_input_thread;
 146 }
 147
 148 /*
 149  * Set the internal state of the media_player. (media player Internal)
 150  *
 151  * Function will lock the media_player.
 152  */
 153 static void set_state( libvlc_media_player_t *p_mi, libvlc_state_t state,
 154     bool b_locked )
 155 {
 156     if(!b_locked)
 157         lock(p_mi);
 158     p_mi->state = state;
 159
 160     libvlc_media_t *media = p_mi->p_md;
 161     if (media)
 162         libvlc_media_retain(media);
 163
 164     if(!b_locked)
 165         unlock(p_mi);
 166
 167     if (media)
 168     {
 169         // Also set the state of the corresponding media
 170         // This is strictly for convenience.
 171         libvlc_media_set_state(media, state);
 172
 173         libvlc_media_release(media);
 174     }
 175 }
 176
 177 static int
 178 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
 179                         vlc_value_t oldval, vlc_value_t newval,
 180                         void * p_userdata )
 181 {
 182     VLC_UNUSED(oldval);
 183     VLC_UNUSED(p_this);
 184     VLC_UNUSED(psz_cmd);
 185     libvlc_media_player_t * p_mi = p_userdata;
 186     libvlc_event_t event;
 187
 188     event.type = libvlc_MediaPlayerSeekableChanged;
 189     event.u.media_player_seekable_changed.new_seekable = newval.b_bool;
 190
 191     libvlc_event_send( p_mi->p_event_manager, &event );
 192     return VLC_SUCCESS;
 193 }
 194
 195 static int
 196 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
 197                         vlc_value_t oldval, vlc_value_t newval,
 198                         void * p_userdata )
 199 {
 200     VLC_UNUSED(oldval);
 201     VLC_UNUSED(p_this);
 202     VLC_UNUSED(psz_cmd);
 203     libvlc_media_player_t * p_mi = p_userdata;
 204     libvlc_event_t event;
 205
 206     event.type = libvlc_MediaPlayerPausableChanged;
 207     event.u.media_player_pausable_changed.new_pausable = newval.b_bool;
 208
 209     libvlc_event_send( p_mi->p_event_manager, &event );
 210     return VLC_SUCCESS;
 211 }
 212
 213 static int
 214 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
 215                      vlc_value_t oldval, vlc_value_t newval,
 216                      void * p_userdata )
 217 {
 218     VLC_UNUSED(oldval);
 219     input_thread_t * p_input = (input_thread_t *)p_this;
 220     libvlc_media_player_t * p_mi = p_userdata;
 221     libvlc_event_t event;
 222
 223     assert( !strcmp( psz_cmd, "intf-event" ) );
 224
 225     if( newval.i_int == INPUT_EVENT_STATE )
 226     {
 227         libvlc_state_t libvlc_state;
 228
 229         switch ( var_GetInteger( p_input, "state" ) )
 230         {
 231             case INIT_S:
 232                 libvlc_state = libvlc_NothingSpecial;
 233                 event.type = libvlc_MediaPlayerNothingSpecial;
 234                 break;
 235             case OPENING_S:
 236                 libvlc_state = libvlc_Opening;
 237                 event.type = libvlc_MediaPlayerOpening;
 238                 break;
 239             case PLAYING_S:
 240                 libvlc_state = libvlc_Playing;
 241                 event.type = libvlc_MediaPlayerPlaying;
 242                 break;
 243             case PAUSE_S:
 244                 libvlc_state = libvlc_Paused;
 245                 event.type = libvlc_MediaPlayerPaused;
 246                 break;
 247             case END_S:
 248                 libvlc_state = libvlc_Ended;
 249                 event.type = libvlc_MediaPlayerEndReached;
 250                 break;
 251             case ERROR_S:
 252                 libvlc_state = libvlc_Error;
 253                 event.type = libvlc_MediaPlayerEncounteredError;
 254                 break;
 255
 256             default:
 257                 return VLC_SUCCESS;
 258         }
 259
 260         set_state( p_mi, libvlc_state, false );
 261         libvlc_event_send( p_mi->p_event_manager, &event );
 262     }
 263     else if( newval.i_int == INPUT_EVENT_ABORT )
 264     {
 265         libvlc_state_t libvlc_state = libvlc_Stopped;
 266         event.type = libvlc_MediaPlayerStopped;
 267
 268         set_state( p_mi, libvlc_state, false );
 269         libvlc_event_send( p_mi->p_event_manager, &event );
 270     }
 271     else if( newval.i_int == INPUT_EVENT_POSITION )
 272     {
 273         if( var_GetInteger( p_input, "state" ) != PLAYING_S )
 274             return VLC_SUCCESS; /* Don't send the position while stopped */
 275
 276         /* */
 277         event.type = libvlc_MediaPlayerPositionChanged;
 278         event.u.media_player_position_changed.new_position =
 279                                           var_GetFloat( p_input, "position" );
 280         libvlc_event_send( p_mi->p_event_manager, &event );
 281
 282         /* */
 283         event.type = libvlc_MediaPlayerTimeChanged;
 284         event.u.media_player_time_changed.new_time =
 285            from_mtime(var_GetTime( p_input, "time" ));
 286         libvlc_event_send( p_mi->p_event_manager, &event );
 287     }
 288     else if( newval.i_int == INPUT_EVENT_LENGTH )
 289     {
 290         event.type = libvlc_MediaPlayerLengthChanged;
 291         event.u.media_player_length_changed.new_length =
 292            from_mtime(var_GetTime( p_input, "length" ));
 293         libvlc_event_send( p_mi->p_event_manager, &event );
 294     }
 295     else if( newval.i_int == INPUT_EVENT_CACHE )
 296     {
 297         event.type = libvlc_MediaPlayerBuffering;
 298         event.u.media_player_buffering.new_cache = (int)(100 *
 299             var_GetFloat( p_input, "cache" ));
 300         libvlc_event_send( p_mi->p_event_manager, &event );
 301     }
 302     else if( newval.i_int == INPUT_EVENT_VOUT )
 303     {
 304         vout_thread_t **pp_vout;
 305         size_t i_vout;
 306         if( input_Control( p_input, INPUT_GET_VOUTS, &pp_vout, &i_vout ) )
 307         {
 308             i_vout  = 0;
 309         }
 310         else
 311         {
 312             for( size_t i = 0; i < i_vout; i++ )
 313                 vlc_object_release( pp_vout[i] );
 314             free( pp_vout );
 315         }
 316
 317         event.type = libvlc_MediaPlayerVout;
 318         event.u.media_player_vout.new_count = i_vout;
 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 /* */
 345 static void libvlc_media_player_destroy( libvlc_media_player_t * );
 346
 347
 348 /**************************************************************************
 349  * Create a Media Instance object.
 350  *
 351  * Refcount strategy:
 352  * - All items created by _new start with a refcount set to 1.
 353  * - Accessor _release decrease the refcount by 1, if after that
 354  *   operation the refcount is 0, the object is destroyed.
 355  * - Accessor _retain increase the refcount by 1 (XXX: to implement)
 356  *
 357  * Object locking strategy:
 358  * - No lock held while in constructor.
 359  * - When accessing any member variable this lock is held. (XXX who locks?)
 360  * - When attempting to destroy the object the lock is also held.
 361  **************************************************************************/
 362 libvlc_media_player_t *
 363 libvlc_media_player_new( libvlc_instance_t *instance )
 364 {
 365     libvlc_media_player_t * mp;
 366
 367     assert(instance);
 368
 369     mp = vlc_object_create (instance->p_libvlc_int, sizeof(*mp));
 370     if (unlikely(mp == NULL))
 371     {
 372         libvlc_printerr("Not enough memory");
 373         return NULL;
 374     }
 375
 376     /* Input */
 377     var_Create (mp, "rate", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT);
 378
 379     /* Video */
 380     var_Create (mp, "vout", VLC_VAR_STRING|VLC_VAR_DOINHERIT);
 381     var_Create (mp, "window", VLC_VAR_STRING);
 382     var_Create (mp, "vmem-lock", VLC_VAR_ADDRESS);
 383     var_Create (mp, "vmem-unlock", VLC_VAR_ADDRESS);
 384     var_Create (mp, "vmem-display", VLC_VAR_ADDRESS);
 385     var_Create (mp, "vmem-data", VLC_VAR_ADDRESS);
 386     var_Create (mp, "vmem-setup", VLC_VAR_ADDRESS);
 387     var_Create (mp, "vmem-cleanup", VLC_VAR_ADDRESS);
 388     var_Create (mp, "vmem-chroma", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 389     var_Create (mp, "vmem-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 390     var_Create (mp, "vmem-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 391     var_Create (mp, "vmem-pitch", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 392     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 393 #if defined (_WIN32) || defined (__OS2__)
 394     var_Create (mp, "drawable-hwnd", VLC_VAR_INTEGER);
 395 #endif
 396 #ifdef __APPLE__
 397     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 398     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 399 #endif
 400
 401     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 402     var_SetBool (mp, "keyboard-events", true);
 403     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 404     var_SetBool (mp, "mouse-events", true);
 405
 406     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 407     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 408     var_SetBool (mp, "autoscale", true);
 409     var_Create (mp, "scale", VLC_VAR_FLOAT);
 410     var_SetFloat (mp, "scale", 1.);
 411     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 412     var_Create (mp, "crop", VLC_VAR_STRING);
 413     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 414     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 415
 416     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 417
 418     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 419     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 420     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 421     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 422     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 423     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 424     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 425     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 426     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 427
 428     var_Create (mp, "logo-file", VLC_VAR_STRING);
 429     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 430     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 431     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 432     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 433     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 434     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 435
 436     var_Create (mp, "contrast", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 437     var_Create (mp, "brightness", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 438     var_Create (mp, "hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 439     var_Create (mp, "saturation", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 440     var_Create (mp, "gamma", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 441
 442      /* Audio */
 443     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 444     var_Create (mp, "mute", VLC_VAR_BOOL);
 445     var_Create (mp, "volume", VLC_VAR_FLOAT);
 446     var_Create (mp, "corks", VLC_VAR_INTEGER);
 447     var_Create (mp, "amem-data", VLC_VAR_ADDRESS);
 448     var_Create (mp, "amem-setup", VLC_VAR_ADDRESS);
 449     var_Create (mp, "amem-cleanup", VLC_VAR_ADDRESS);
 450     var_Create (mp, "amem-play", VLC_VAR_ADDRESS);
 451     var_Create (mp, "amem-pause", VLC_VAR_ADDRESS);
 452     var_Create (mp, "amem-resume", VLC_VAR_ADDRESS);
 453     var_Create (mp, "amem-flush", VLC_VAR_ADDRESS);
 454     var_Create (mp, "amem-drain", VLC_VAR_ADDRESS);
 455     var_Create (mp, "amem-set-volume", VLC_VAR_ADDRESS);
 456     var_Create (mp, "amem-format", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 457     var_Create (mp, "amem-rate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 458     var_Create (mp, "amem-channels", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 459
 460     mp->p_md = NULL;
 461     mp->state = libvlc_NothingSpecial;
 462     mp->p_libvlc_instance = instance;
 463     mp->input.p_thread = NULL;
 464     mp->input.p_resource = input_resource_New(VLC_OBJECT(mp));
 465     if (unlikely(mp->input.p_resource == NULL))
 466     {
 467         vlc_object_release(mp);
 468         return NULL;
 469     }
 470     vlc_mutex_init (&mp->input.lock);
 471     mp->i_refcount = 1;
 472     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 473     if (unlikely(mp->p_event_manager == NULL))
 474     {
 475         input_resource_Release(mp->input.p_resource);
 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     register_event(mp, Vout);
 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     input_resource_Terminate( p_mi->input.p_resource );
 554     input_resource_Release( p_mi->input.p_resource );
 555     vlc_mutex_destroy( &p_mi->input.lock );
 556
 557     libvlc_event_manager_release( p_mi->p_event_manager );
 558     libvlc_media_release( p_mi->p_md );
 559     vlc_mutex_destroy( &p_mi->object_lock );
 560
 561     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 562     vlc_object_release( p_mi );
 563     libvlc_release(instance);
 564 }
 565
 566 /**************************************************************************
 567  * Release a Media Instance object.
 568  *
 569  * Function does the locking.
 570  **************************************************************************/
 571 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 572 {
 573     bool destroy;
 574
 575     assert( p_mi );
 576     lock(p_mi);
 577     destroy = !--p_mi->i_refcount;
 578     unlock(p_mi);
 579
 580     if( destroy )
 581         libvlc_media_player_destroy( p_mi );
 582 }
 583
 584 /**************************************************************************
 585  * Retain a Media Instance object.
 586  *
 587  * Caller must hold the lock.
 588  **************************************************************************/
 589 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 590 {
 591     assert( p_mi );
 592
 593     lock(p_mi);
 594     p_mi->i_refcount++;
 595     unlock(p_mi);
 596 }
 597
 598 /**************************************************************************
 599  * Set the Media descriptor associated with the instance.
 600  *
 601  * Enter without lock -- function will lock the object.
 602  **************************************************************************/
 603 void libvlc_media_player_set_media(
 604                             libvlc_media_player_t *p_mi,
 605                             libvlc_media_t *p_md )
 606 {
 607     lock_input(p_mi);
 608
 609     /* FIXME I am not sure if it is a user request or on die(eof/error)
 610      * request here */
 611     release_input_thread( p_mi,
 612                           p_mi->input.p_thread &&
 613                           !p_mi->input.p_thread->b_eof &&
 614                           !p_mi->input.p_thread->b_error );
 615
 616     lock( p_mi );
 617     set_state( p_mi, libvlc_NothingSpecial, true );
 618     unlock_input( p_mi );
 619
 620     libvlc_media_release( p_mi->p_md );
 621
 622     if( !p_md )
 623     {
 624         p_mi->p_md = NULL;
 625         unlock(p_mi);
 626         return; /* It is ok to pass a NULL md */
 627     }
 628
 629     libvlc_media_retain( p_md );
 630     p_mi->p_md = p_md;
 631
 632     /* The policy here is to ignore that we were created using a different
 633      * libvlc_instance, because we don't really care */
 634     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 635
 636     unlock(p_mi);
 637
 638     /* Send an event for the newly available media */
 639     libvlc_event_t event;
 640     event.type = libvlc_MediaPlayerMediaChanged;
 641     event.u.media_player_media_changed.new_media = p_md;
 642     libvlc_event_send( p_mi->p_event_manager, &event );
 643
 644 }
 645
 646 /**************************************************************************
 647  * Get the Media descriptor associated with the instance.
 648  **************************************************************************/
 649 libvlc_media_t *
 650 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 651 {
 652     libvlc_media_t *p_m;
 653
 654     lock(p_mi);
 655     p_m = p_mi->p_md;
 656     if( p_m )
 657         libvlc_media_retain( p_mi->p_md );
 658     unlock(p_mi);
 659     return p_mi->p_md;
 660 }
 661
 662 /**************************************************************************
 663  * Get the event Manager.
 664  **************************************************************************/
 665 libvlc_event_manager_t *
 666 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 667 {
 668     return p_mi->p_event_manager;
 669 }
 670
 671 /**************************************************************************
 672  * Tell media player to start playing.
 673  **************************************************************************/
 674 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 675 {
 676     lock_input( p_mi );
 677
 678     input_thread_t *p_input_thread = p_mi->input.p_thread;
 679     if( p_input_thread )
 680     {
 681         /* A thread already exists, send it a play message */
 682         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 683         unlock_input( p_mi );
 684         return 0;
 685     }
 686
 687     /* Ignore previous exception */
 688     lock(p_mi);
 689
 690     if( !p_mi->p_md )
 691     {
 692         unlock(p_mi);
 693         unlock_input( p_mi );
 694         libvlc_printerr( "No associated media descriptor" );
 695         return -1;
 696     }
 697
 698     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 699                                    p_mi->input.p_resource );
 700     unlock(p_mi);
 701     if( !p_input_thread )
 702     {
 703         unlock_input(p_mi);
 704         libvlc_printerr( "Not enough memory" );
 705         return -1;
 706     }
 707
 708     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 709     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 710     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 711
 712     if( input_Start( p_input_thread ) )
 713     {
 714         unlock_input(p_mi);
 715         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 716         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 717         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 718         vlc_object_release( p_input_thread );
 719         libvlc_printerr( "Input initialization failure" );
 720         return -1;
 721     }
 722     p_mi->input.p_thread = p_input_thread;
 723     unlock_input(p_mi);
 724     return 0;
 725 }
 726
 727 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 728 {
 729     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 730     if( !p_input_thread )
 731         return;
 732
 733     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 734     if( state == libvlc_Playing || state == libvlc_Buffering )
 735     {
 736         if( paused )
 737         {
 738             if( libvlc_media_player_can_pause( p_mi ) )
 739                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 740             else
 741                 libvlc_media_player_stop( p_mi );
 742         }
 743     }
 744     else
 745     {
 746         if( !paused )
 747             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 748     }
 749
 750     vlc_object_release( p_input_thread );
 751 }
 752
 753 /**************************************************************************
 754  * Toggle pause.
 755  **************************************************************************/
 756 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 757 {
 758     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 759     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 760
 761     libvlc_media_player_set_pause( p_mi, playing );
 762 }
 763
 764 /**************************************************************************
 765  * Tells whether the media player is currently playing.
 766  *
 767  * Enter with lock held.
 768  **************************************************************************/
 769 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 770 {
 771     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 772     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 773 }
 774
 775 /**************************************************************************
 776  * Stop playing.
 777  **************************************************************************/
 778 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 779 {
 780     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 781
 782     lock_input(p_mi);
 783     release_input_thread( p_mi, true ); /* This will stop the input thread */
 784
 785     /* Force to go to stopped state, in case we were in Ended, or Error
 786      * state. */
 787     if( state != libvlc_Stopped )
 788     {
 789         set_state( p_mi, libvlc_Stopped, false );
 790
 791         /* Construct and send the event */
 792         libvlc_event_t event;
 793         event.type = libvlc_MediaPlayerStopped;
 794         libvlc_event_send( p_mi->p_event_manager, &event );
 795     }
 796
 797     input_resource_Terminate( p_mi->input.p_resource );
 798     unlock_input(p_mi);
 799 }
 800
 801
 802 void libvlc_video_set_callbacks( libvlc_media_player_t *mp,
 803     void *(*lock_cb) (void *, void **),
 804     void (*unlock_cb) (void *, void *, void *const *),
 805     void (*display_cb) (void *, void *),
 806     void *opaque )
 807 {
 808     var_SetAddress( mp, "vmem-lock", lock_cb );
 809     var_SetAddress( mp, "vmem-unlock", unlock_cb );
 810     var_SetAddress( mp, "vmem-display", display_cb );
 811     var_SetAddress( mp, "vmem-data", opaque );
 812     var_SetString( mp, "vout", "vmem" );
 813 }
 814
 815 void libvlc_video_set_format_callbacks( libvlc_media_player_t *mp,
 816                                         libvlc_video_format_cb setup,
 817                                         libvlc_video_cleanup_cb cleanup )
 818 {
 819     var_SetAddress( mp, "vmem-setup", setup );
 820     var_SetAddress( mp, "vmem-cleanup", cleanup );
 821 }
 822
 823 void libvlc_video_set_format( libvlc_media_player_t *mp, const char *chroma,
 824                               unsigned width, unsigned height, unsigned pitch )
 825 {
 826     var_SetString( mp, "vmem-chroma", chroma );
 827     var_SetInteger( mp, "vmem-width", width );
 828     var_SetInteger( mp, "vmem-height", height );
 829     var_SetInteger( mp, "vmem-pitch", pitch );
 830 }
 831
 832 /**************************************************************************
 833  * set_nsobject
 834  **************************************************************************/
 835 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 836                                         void * drawable )
 837 {
 838     assert (p_mi != NULL);
 839 #ifdef __APPLE__
 840     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 841 #else
 842     (void) p_mi; (void)drawable;
 843 #endif
 844 }
 845
 846 /**************************************************************************
 847  * get_nsobject
 848  **************************************************************************/
 849 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 850 {
 851     assert (p_mi != NULL);
 852 #ifdef __APPLE__
 853     return var_GetAddress (p_mi, "drawable-nsobject");
 854 #else
 855     return NULL;
 856 #endif
 857 }
 858
 859 /**************************************************************************
 860  * set_agl
 861  **************************************************************************/
 862 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 863                                   uint32_t drawable )
 864 {
 865 #ifdef __APPLE__
 866     var_SetInteger (p_mi, "drawable-agl", drawable);
 867 #else
 868     (void) p_mi; (void)drawable;
 869 #endif
 870 }
 871
 872 /**************************************************************************
 873  * get_agl
 874  **************************************************************************/
 875 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 876 {
 877     assert (p_mi != NULL);
 878 #ifdef __APPLE__
 879     return var_GetInteger (p_mi, "drawable-agl");
 880 #else
 881     return 0;
 882 #endif
 883 }
 884
 885 /**************************************************************************
 886  * set_xwindow
 887  **************************************************************************/
 888 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 889                                       uint32_t drawable )
 890 {
 891     assert (p_mi != NULL);
 892
 893     var_SetString (p_mi, "vout", drawable ? "xid" : "any");
 894     var_SetString (p_mi, "window", drawable ? "embed-xid,any" : "any");
 895     var_SetInteger (p_mi, "drawable-xid", drawable);
 896 }
 897
 898 /**************************************************************************
 899  * get_xwindow
 900  **************************************************************************/
 901 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 902 {
 903     return var_GetInteger (p_mi, "drawable-xid");
 904 }
 905
 906 /**************************************************************************
 907  * set_hwnd
 908  **************************************************************************/
 909 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 910                                    void *drawable )
 911 {
 912     assert (p_mi != NULL);
 913 #if defined (_WIN32) || defined (__OS2__)
 914     var_SetString (p_mi, "window",
 915                    (drawable != NULL) ? "embed-hwnd,any" : "");
 916     var_SetInteger (p_mi, "drawable-hwnd", (uintptr_t)drawable);
 917 #else
 918     (void) p_mi; (void) drawable;
 919 #endif
 920 }
 921
 922 /**************************************************************************
 923  * get_hwnd
 924  **************************************************************************/
 925 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 926 {
 927     assert (p_mi != NULL);
 928 #if defined (_WIN32) || defined (__OS2__)
 929     return (void *)(uintptr_t)var_GetInteger (p_mi, "drawable-hwnd");
 930 #else
 931     return NULL;
 932 #endif
 933 }
 934
 935 void libvlc_audio_set_callbacks( libvlc_media_player_t *mp,
 936                                  libvlc_audio_play_cb play_cb,
 937                                  libvlc_audio_pause_cb pause_cb,
 938                                  libvlc_audio_resume_cb resume_cb,
 939                                  libvlc_audio_flush_cb flush_cb,
 940                                  libvlc_audio_drain_cb drain_cb,
 941                                  void *opaque )
 942 {
 943     var_SetAddress( mp, "amem-play", play_cb );
 944     var_SetAddress( mp, "amem-pause", pause_cb );
 945     var_SetAddress( mp, "amem-resume", resume_cb );
 946     var_SetAddress( mp, "amem-flush", flush_cb );
 947     var_SetAddress( mp, "amem-drain", drain_cb );
 948     var_SetAddress( mp, "amem-data", opaque );
 949     var_SetString( mp, "aout", "amem,none" );
 950 }
 951
 952 void libvlc_audio_set_volume_callback( libvlc_media_player_t *mp,
 953                                        libvlc_audio_set_volume_cb cb )
 954 {
 955     var_SetAddress( mp, "amem-set-volume", cb );
 956 }
 957
 958 void libvlc_audio_set_format_callbacks( libvlc_media_player_t *mp,
 959                                         libvlc_audio_setup_cb setup,
 960                                         libvlc_audio_cleanup_cb cleanup )
 961 {
 962     var_SetAddress( mp, "amem-setup", setup );
 963     var_SetAddress( mp, "amem-cleanup", cleanup );
 964 }
 965
 966 void libvlc_audio_set_format( libvlc_media_player_t *mp, const char *format,
 967                               unsigned rate, unsigned channels )
 968 {
 969     var_SetString( mp, "amem-format", format );
 970     var_SetInteger( mp, "amem-rate", rate );
 971     var_SetInteger( mp, "amem-channels", channels );
 972 }
 973
 974
 975 /**************************************************************************
 976  * Getters for stream information
 977  **************************************************************************/
 978 libvlc_time_t libvlc_media_player_get_length(
 979                              libvlc_media_player_t *p_mi )
 980 {
 981     input_thread_t *p_input_thread;
 982     libvlc_time_t i_time;
 983
 984     p_input_thread = libvlc_get_input_thread ( p_mi );
 985     if( !p_input_thread )
 986         return -1;
 987
 988     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 989     vlc_object_release( p_input_thread );
 990
 991     return i_time;
 992 }
 993
 994 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 995 {
 996     input_thread_t *p_input_thread;
 997     libvlc_time_t i_time;
 998
 999     p_input_thread = libvlc_get_input_thread ( p_mi );
1000     if( !p_input_thread )
1001         return -1;
1002
1003     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
1004     vlc_object_release( p_input_thread );
1005     return i_time;
1006 }
1007
1008 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
1009                                    libvlc_time_t i_time )
1010 {
1011     input_thread_t *p_input_thread;
1012
1013     p_input_thread = libvlc_get_input_thread ( p_mi );
1014     if( !p_input_thread )
1015         return;
1016
1017     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
1018     vlc_object_release( p_input_thread );
1019 }
1020
1021 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
1022                                        float position )
1023 {
1024     input_thread_t *p_input_thread;
1025
1026     p_input_thread = libvlc_get_input_thread ( p_mi );
1027     if( !p_input_thread )
1028         return;
1029
1030     var_SetFloat( p_input_thread, "position", position );
1031     vlc_object_release( p_input_thread );
1032 }
1033
1034 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
1035 {
1036     input_thread_t *p_input_thread;
1037     float f_position;
1038
1039     p_input_thread = libvlc_get_input_thread ( p_mi );
1040     if( !p_input_thread )
1041         return -1.0;
1042
1043     f_position = var_GetFloat( p_input_thread, "position" );
1044     vlc_object_release( p_input_thread );
1045
1046     return f_position;
1047 }
1048
1049 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
1050                                       int chapter )
1051 {
1052     input_thread_t *p_input_thread;
1053
1054     p_input_thread = libvlc_get_input_thread ( p_mi );
1055     if( !p_input_thread )
1056         return;
1057
1058     var_SetInteger( p_input_thread, "chapter", chapter );
1059     vlc_object_release( p_input_thread );
1060 }
1061
1062 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
1063 {
1064     input_thread_t *p_input_thread;
1065     int i_chapter;
1066
1067     p_input_thread = libvlc_get_input_thread ( p_mi );
1068     if( !p_input_thread )
1069         return -1;
1070
1071     i_chapter = var_GetInteger( p_input_thread, "chapter" );
1072     vlc_object_release( p_input_thread );
1073
1074     return i_chapter;
1075 }
1076
1077 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
1078 {
1079     input_thread_t *p_input_thread;
1080     vlc_value_t val;
1081
1082     p_input_thread = libvlc_get_input_thread ( p_mi );
1083     if( !p_input_thread )
1084         return -1;
1085
1086     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
1087     vlc_object_release( p_input_thread );
1088
1089     return val.i_int;
1090 }
1091
1092 int libvlc_media_player_get_chapter_count_for_title(
1093                                  libvlc_media_player_t *p_mi,
1094                                  int i_title )
1095 {
1096     input_thread_t *p_input_thread;
1097     vlc_value_t val;
1098
1099     p_input_thread = libvlc_get_input_thread ( p_mi );
1100     if( !p_input_thread )
1101         return -1;
1102
1103     char *psz_name;
1104     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
1105     {
1106         vlc_object_release( p_input_thread );
1107         return -1;
1108     }
1109     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1110     vlc_object_release( p_input_thread );
1111     free( psz_name );
1112
1113     return val.i_int;
1114 }
1115
1116 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1117                                     int i_title )
1118 {
1119     input_thread_t *p_input_thread;
1120
1121     p_input_thread = libvlc_get_input_thread ( p_mi );
1122     if( !p_input_thread )
1123         return;
1124
1125     var_SetInteger( p_input_thread, "title", i_title );
1126     vlc_object_release( p_input_thread );
1127
1128     //send event
1129     libvlc_event_t event;
1130     event.type = libvlc_MediaPlayerTitleChanged;
1131     event.u.media_player_title_changed.new_title = i_title;
1132     libvlc_event_send( p_mi->p_event_manager, &event );
1133 }
1134
1135 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1136 {
1137     input_thread_t *p_input_thread;
1138     int i_title;
1139
1140     p_input_thread = libvlc_get_input_thread ( p_mi );
1141     if( !p_input_thread )
1142         return -1;
1143
1144     i_title = var_GetInteger( p_input_thread, "title" );
1145     vlc_object_release( p_input_thread );
1146
1147     return i_title;
1148 }
1149
1150 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1151 {
1152     input_thread_t *p_input_thread;
1153     vlc_value_t val;
1154
1155     p_input_thread = libvlc_get_input_thread ( p_mi );
1156     if( !p_input_thread )
1157         return -1;
1158
1159     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1160     vlc_object_release( p_input_thread );
1161
1162     return val.i_int;
1163 }
1164
1165 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1166 {
1167     input_thread_t *p_input_thread;
1168
1169     p_input_thread = libvlc_get_input_thread ( p_mi );
1170     if( !p_input_thread )
1171         return;
1172
1173     int i_type = var_Type( p_input_thread, "next-chapter" );
1174     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1175                             "next-chapter":"next-title" );
1176
1177     vlc_object_release( p_input_thread );
1178 }
1179
1180 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1181 {
1182     input_thread_t *p_input_thread;
1183
1184     p_input_thread = libvlc_get_input_thread ( p_mi );
1185     if( !p_input_thread )
1186         return;
1187
1188     int i_type = var_Type( p_input_thread, "next-chapter" );
1189     var_TriggerCallback( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1190                             "prev-chapter":"prev-title" );
1191
1192     vlc_object_release( p_input_thread );
1193 }
1194
1195 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1196 {
1197     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1198     double f_fps = 0.0;
1199
1200     if( p_input_thread )
1201     {
1202         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1203             f_fps = 0.0;
1204         vlc_object_release( p_input_thread );
1205     }
1206     return f_fps;
1207 }
1208
1209 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1210 {
1211     bool b_will_play;
1212     input_thread_t *p_input_thread =
1213                             libvlc_get_input_thread ( p_mi );
1214     if ( !p_input_thread )
1215         return false;
1216
1217     b_will_play = !p_input_thread->b_dead;
1218     vlc_object_release( p_input_thread );
1219
1220     return b_will_play;
1221 }
1222
1223 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1224 {
1225     if (rate < 0.)
1226     {
1227         libvlc_printerr ("Playing backward not supported");
1228         return -1;
1229     }
1230
1231     var_SetFloat (p_mi, "rate", rate);
1232
1233     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1234     if( !p_input_thread )
1235         return 0;
1236     var_SetFloat( p_input_thread, "rate", rate );
1237     vlc_object_release( p_input_thread );
1238     return 0;
1239 }
1240
1241 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1242 {
1243     return var_GetFloat (p_mi, "rate");
1244 }
1245
1246 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1247 {
1248     lock(p_mi);
1249     libvlc_state_t state = p_mi->state;
1250     unlock(p_mi);
1251     return state;
1252 }
1253
1254 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1255 {
1256     input_thread_t *p_input_thread;
1257     bool b_seekable;
1258
1259     p_input_thread = libvlc_get_input_thread ( p_mi );
1260     if ( !p_input_thread )
1261         return false;
1262     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1263     vlc_object_release( p_input_thread );
1264
1265     return b_seekable;
1266 }
1267
1268 void libvlc_media_player_navigate( libvlc_media_player_t* p_mi,
1269                                    unsigned navigate )
1270 {
1271     static const vlc_action_t map[] =
1272     {
1273         INPUT_NAV_ACTIVATE, INPUT_NAV_UP, INPUT_NAV_DOWN,
1274         INPUT_NAV_LEFT, INPUT_NAV_RIGHT,
1275     };
1276
1277     if( navigate >= sizeof(map) / sizeof(map[0]) )
1278       return;
1279
1280     input_thread_t *p_input = libvlc_get_input_thread ( p_mi );
1281     if ( p_input == NULL )
1282       return;
1283
1284     input_Control( p_input, map[navigate], NULL );
1285     vlc_object_release( p_input );
1286 }
1287
1288 /* internal function, used by audio, video */
1289 libvlc_track_description_t *
1290         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1291                                       const char *psz_variable )
1292 {
1293     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1294     libvlc_track_description_t *p_track_description = NULL,
1295                                *p_actual, *p_previous;
1296
1297     if( !p_input )
1298         return NULL;
1299
1300     vlc_value_t val_list, text_list;
1301     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1302
1303     /* no tracks */
1304     if( val_list.p_list->i_count <= 0 )
1305         goto end;
1306
1307     p_track_description = ( libvlc_track_description_t * )
1308         malloc( sizeof( libvlc_track_description_t ) );
1309     if ( !p_track_description )
1310     {
1311         libvlc_printerr( "Not enough memory" );
1312         goto end;
1313     }
1314     p_actual = p_track_description;
1315     p_previous = NULL;
1316     for( int i = 0; i < val_list.p_list->i_count; i++ )
1317     {
1318         if( !p_actual )
1319         {
1320             p_actual = ( libvlc_track_description_t * )
1321                 malloc( sizeof( libvlc_track_description_t ) );
1322             if ( !p_actual )
1323             {
1324                 libvlc_track_description_list_release( p_track_description );
1325                 libvlc_printerr( "Not enough memory" );
1326                 goto end;
1327             }
1328         }
1329         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1330         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1331         p_actual->p_next = NULL;
1332         if( p_previous )
1333             p_previous->p_next = p_actual;
1334         p_previous = p_actual;
1335         p_actual =  NULL;
1336     }
1337
1338 end:
1339     var_FreeList( &val_list, &text_list );
1340     vlc_object_release( p_input );
1341
1342     return p_track_description;
1343 }
1344
1345 // Deprecated alias for libvlc_track_description_list_release
1346 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1347 {
1348     libvlc_track_description_list_release( p_td );
1349 }
1350
1351 void libvlc_track_description_list_release( libvlc_track_description_t *p_td )
1352 {
1353     libvlc_track_description_t *p_actual, *p_before;
1354     p_actual = p_td;
1355
1356     while ( p_actual )
1357     {
1358         free( p_actual->psz_name );
1359         p_before = p_actual;
1360         p_actual = p_before->p_next;
1361         free( p_before );
1362     }
1363 }
1364
1365 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1366 {
1367     input_thread_t *p_input_thread;
1368     bool b_can_pause;
1369
1370     p_input_thread = libvlc_get_input_thread ( p_mi );
1371     if ( !p_input_thread )
1372         return false;
1373     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1374     vlc_object_release( p_input_thread );
1375
1376     return b_can_pause;
1377 }
1378
1379 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1380 {
1381     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1382     if( p_input_thread != NULL )
1383     {
1384         var_TriggerCallback( p_input_thread, "frame-next" );
1385         vlc_object_release( p_input_thread );
1386     }
1387 }