src/control/media_player.c

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