git.sesse.net Git - vlc/blob - src/control/media_player.c

   1 /*****************************************************************************
   2  * media_player.c: Libvlc API Media Instance management functions
   3  *****************************************************************************
   4  * Copyright (C) 2005-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <assert.h>
  29
  30 #include <vlc/libvlc.h>
  31 #include <vlc/libvlc_media.h>
  32 #include <vlc/libvlc_events.h>
  33
  34 #include <vlc_demux.h>
  35 #include <vlc_input.h>
  36 #include <vlc_vout.h>
  37
  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     p_mi->input.p_thread = NULL;
 131     vlc_object_release( p_input_thread );
 132 }
 133
 134 /*
 135  * Retrieve the input thread. Be sure to release the object
 136  * once you are done with it. (libvlc Internal)
 137  */
 138 input_thread_t *libvlc_get_input_thread( libvlc_media_player_t *p_mi )
 139 {
 140     input_thread_t *p_input_thread;
 141
 142     assert( p_mi );
 143
 144     lock_input(p_mi);
 145     p_input_thread = p_mi->input.p_thread;
 146     if( p_input_thread )
 147         vlc_object_hold( p_input_thread );
 148     else
 149         libvlc_printerr( "No active input" );
 150     unlock_input(p_mi);
 151
 152     return p_input_thread;
 153 }
 154
 155 /*
 156  * Set the internal state of the media_player. (media player Internal)
 157  *
 158  * Function will lock the media_player.
 159  */
 160 static void set_state( libvlc_media_player_t *p_mi, libvlc_state_t state,
 161     bool b_locked )
 162 {
 163     if(!b_locked)
 164         lock(p_mi);
 165     p_mi->state = state;
 166
 167     libvlc_media_t *media = p_mi->p_md;
 168     if (media)
 169         libvlc_media_retain(media);
 170
 171     if(!b_locked)
 172         unlock(p_mi);
 173
 174     if (media)
 175     {
 176         // Also set the state of the corresponding media
 177         // This is strictly for convenience.
 178         libvlc_media_set_state(media, state);
 179
 180         libvlc_media_release(media);
 181     }
 182 }
 183
 184 static int
 185 input_seekable_changed( vlc_object_t * p_this, char const * psz_cmd,
 186                         vlc_value_t oldval, vlc_value_t newval,
 187                         void * p_userdata )
 188 {
 189     VLC_UNUSED(oldval);
 190     VLC_UNUSED(p_this);
 191     VLC_UNUSED(psz_cmd);
 192     libvlc_media_player_t * p_mi = p_userdata;
 193     libvlc_event_t event;
 194
 195     event.type = libvlc_MediaPlayerSeekableChanged;
 196     event.u.media_player_seekable_changed.new_seekable = newval.b_bool;
 197
 198     libvlc_event_send( p_mi->p_event_manager, &event );
 199     return VLC_SUCCESS;
 200 }
 201
 202 static int
 203 input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
 204                         vlc_value_t oldval, vlc_value_t newval,
 205                         void * p_userdata )
 206 {
 207     VLC_UNUSED(oldval);
 208     VLC_UNUSED(p_this);
 209     VLC_UNUSED(psz_cmd);
 210     libvlc_media_player_t * p_mi = p_userdata;
 211     libvlc_event_t event;
 212
 213     event.type = libvlc_MediaPlayerPausableChanged;
 214     event.u.media_player_pausable_changed.new_pausable = newval.b_bool;
 215
 216     libvlc_event_send( p_mi->p_event_manager, &event );
 217     return VLC_SUCCESS;
 218 }
 219
 220 static int
 221 input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
 222                      vlc_value_t oldval, vlc_value_t newval,
 223                      void * p_userdata )
 224 {
 225     VLC_UNUSED(oldval);
 226     input_thread_t * p_input = (input_thread_t *)p_this;
 227     libvlc_media_player_t * p_mi = p_userdata;
 228     libvlc_event_t event;
 229
 230     assert( !strcmp( psz_cmd, "intf-event" ) );
 231
 232     if( newval.i_int == INPUT_EVENT_STATE )
 233     {
 234         libvlc_state_t libvlc_state;
 235
 236         switch ( var_GetInteger( p_input, "state" ) )
 237         {
 238             case INIT_S:
 239                 libvlc_state = libvlc_NothingSpecial;
 240                 event.type = libvlc_MediaPlayerNothingSpecial;
 241                 break;
 242             case OPENING_S:
 243                 libvlc_state = libvlc_Opening;
 244                 event.type = libvlc_MediaPlayerOpening;
 245                 break;
 246             case PLAYING_S:
 247                 libvlc_state = libvlc_Playing;
 248                 event.type = libvlc_MediaPlayerPlaying;
 249                 break;
 250             case PAUSE_S:
 251                 libvlc_state = libvlc_Paused;
 252                 event.type = libvlc_MediaPlayerPaused;
 253                 break;
 254             case END_S:
 255                 libvlc_state = libvlc_Ended;
 256                 event.type = libvlc_MediaPlayerEndReached;
 257                 break;
 258             case ERROR_S:
 259                 libvlc_state = libvlc_Error;
 260                 event.type = libvlc_MediaPlayerEncounteredError;
 261                 break;
 262
 263             default:
 264                 return VLC_SUCCESS;
 265         }
 266
 267         set_state( p_mi, libvlc_state, false );
 268         libvlc_event_send( p_mi->p_event_manager, &event );
 269     }
 270     else if( newval.i_int == INPUT_EVENT_ABORT )
 271     {
 272         libvlc_state_t libvlc_state = libvlc_Stopped;
 273         event.type = libvlc_MediaPlayerStopped;
 274
 275         set_state( p_mi, libvlc_state, false );
 276         libvlc_event_send( p_mi->p_event_manager, &event );
 277     }
 278     else if( newval.i_int == INPUT_EVENT_POSITION )
 279     {
 280         if( var_GetInteger( p_input, "state" ) != PLAYING_S )
 281             return VLC_SUCCESS; /* Don't send the position while stopped */
 282
 283         /* */
 284         event.type = libvlc_MediaPlayerPositionChanged;
 285         event.u.media_player_position_changed.new_position =
 286                                           var_GetFloat( p_input, "position" );
 287         libvlc_event_send( p_mi->p_event_manager, &event );
 288
 289         /* */
 290         event.type = libvlc_MediaPlayerTimeChanged;
 291         event.u.media_player_time_changed.new_time =
 292            from_mtime(var_GetTime( p_input, "time" ));
 293         libvlc_event_send( p_mi->p_event_manager, &event );
 294     }
 295     else if( newval.i_int == INPUT_EVENT_LENGTH )
 296     {
 297         event.type = libvlc_MediaPlayerLengthChanged;
 298         event.u.media_player_length_changed.new_length =
 299            from_mtime(var_GetTime( p_input, "length" ));
 300         libvlc_event_send( p_mi->p_event_manager, &event );
 301     }
 302
 303     return VLC_SUCCESS;
 304
 305 }
 306
 307 /**************************************************************************
 308  * Snapshot Taken Event.
 309  *
 310  * FIXME: This snapshot API interface makes no sense in media_player.
 311  *************************************************************************/
 312 static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd,
 313                               vlc_value_t oldval, vlc_value_t newval, void *p_data )
 314 {
 315     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_this);
 316
 317     libvlc_media_player_t *mp = p_data;
 318     libvlc_event_t event;
 319     event.type = libvlc_MediaPlayerSnapshotTaken;
 320     event.u.media_player_snapshot_taken.psz_filename = newval.psz_string;
 321     libvlc_event_send(mp->p_event_manager, &event);
 322
 323     return VLC_SUCCESS;
 324 }
 325
 326 static input_thread_t *find_input (vlc_object_t *obj)
 327 {
 328     libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;
 329
 330     return libvlc_get_input_thread (mp);
 331 }
 332
 333 /* */
 334 static void libvlc_media_player_destroy( libvlc_media_player_t * );
 335
 336
 337 /**************************************************************************
 338  * Create a Media Instance object.
 339  *
 340  * Refcount strategy:
 341  * - All items created by _new start with a refcount set to 1.
 342  * - Accessor _release decrease the refcount by 1, if after that
 343  *   operation the refcount is 0, the object is destroyed.
 344  * - Accessor _retain increase the refcount by 1 (XXX: to implement)
 345  *
 346  * Object locking strategy:
 347  * - No lock held while in constructor.
 348  * - When accessing any member variable this lock is held. (XXX who locks?)
 349  * - When attempting to destroy the object the lock is also held.
 350  **************************************************************************/
 351 libvlc_media_player_t *
 352 libvlc_media_player_new( libvlc_instance_t *instance )
 353 {
 354     libvlc_media_player_t * mp;
 355
 356     assert(instance);
 357
 358     mp = vlc_object_create (instance->p_libvlc_int, sizeof(*mp));
 359     if (unlikely(mp == NULL))
 360     {
 361         libvlc_printerr("Not enough memory");
 362         return NULL;
 363     }
 364     vlc_object_attach (mp, mp->p_libvlc);
 365
 366     /* Input */
 367     var_Create (mp, "rate", VLC_VAR_FLOAT|VLC_VAR_DOINHERIT);
 368
 369     /* Video */
 370     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 371 #ifdef WIN32
 372     var_Create (mp, "drawable-hwnd", VLC_VAR_ADDRESS);
 373 #endif
 374 #ifdef __APPLE__
 375     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 376     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 377 #endif
 378
 379     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 380     var_SetBool (mp, "keyboard-events", true);
 381     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 382     var_SetBool (mp, "mouse-events", true);
 383
 384     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 385     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 386     var_SetBool (mp, "autoscale", true);
 387     var_Create (mp, "scale", VLC_VAR_FLOAT);
 388     var_SetFloat (mp, "scale", 1.);
 389     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 390     var_Create (mp, "crop", VLC_VAR_STRING);
 391     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 392     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 393
 394     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 395
 396     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 397     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 398     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 399     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 400     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 401     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 402     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 403     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 404     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 405
 406     var_Create (mp, "logo-file", VLC_VAR_STRING);
 407     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 408     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 409     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 410     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 411     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 412     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 413
 414     var_Create (mp, "contrast", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 415     var_Create (mp, "brightness", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 416     var_Create (mp, "hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 417     var_Create (mp, "saturation", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 418     var_Create (mp, "gamma", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 419
 420      /* Audio */
 421     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 422     var_Create (mp, "volume-muted", VLC_VAR_BOOL);
 423     var_Create (mp, "saved-volume", VLC_VAR_INTEGER);
 424     var_Create (mp, "volume-change", VLC_VAR_VOID);
 425     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 426     var_SetAddress (mp, "find-input-callback", find_input);
 427
 428     mp->p_md = NULL;
 429     mp->state = libvlc_NothingSpecial;
 430     mp->p_libvlc_instance = instance;
 431     mp->input.p_thread = NULL;
 432     mp->input.p_resource = NULL;
 433     vlc_mutex_init (&mp->input.lock);
 434     mp->i_refcount = 1;
 435     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 436     if (unlikely(mp->p_event_manager == NULL))
 437     {
 438         vlc_object_release(mp);
 439         return NULL;
 440     }
 441     vlc_mutex_init(&mp->object_lock);
 442
 443     register_event(mp, NothingSpecial);
 444     register_event(mp, Opening);
 445     register_event(mp, Buffering);
 446     register_event(mp, Playing);
 447     register_event(mp, Paused);
 448     register_event(mp, Stopped);
 449     register_event(mp, Forward);
 450     register_event(mp, Backward);
 451     register_event(mp, EndReached);
 452     register_event(mp, EncounteredError);
 453     register_event(mp, SeekableChanged);
 454
 455     register_event(mp, PositionChanged);
 456     register_event(mp, TimeChanged);
 457     register_event(mp, LengthChanged);
 458     register_event(mp, TitleChanged);
 459     register_event(mp, PausableChanged);
 460
 461     /* Snapshot initialization */
 462     register_event(mp, SnapshotTaken);
 463
 464     register_event(mp, MediaChanged);
 465
 466     /* Attach a var callback to the global object to provide the glue between
 467      * vout_thread that generates the event and media_player that re-emits it
 468      * with its own event manager
 469      *
 470      * FIXME: It's unclear why we want to put this in public API, and why we
 471      * want to expose it in such a limiting and ugly way.
 472      */
 473     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 474
 475     libvlc_retain(instance);
 476     return mp;
 477 }
 478
 479 /**************************************************************************
 480  * Create a Media Instance object with a media descriptor.
 481  **************************************************************************/
 482 libvlc_media_player_t *
 483 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 484 {
 485     libvlc_media_player_t * p_mi;
 486
 487     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 488     if( !p_mi )
 489         return NULL;
 490
 491     libvlc_media_retain( p_md );
 492     p_mi->p_md = p_md;
 493
 494     return p_mi;
 495 }
 496
 497 /**************************************************************************
 498  * Destroy a Media Instance object (libvlc internal)
 499  *
 500  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 501  **************************************************************************/
 502 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 503 {
 504     assert( p_mi );
 505
 506     /* Detach Callback from the main libvlc object */
 507     var_DelCallback( p_mi->p_libvlc,
 508                      "snapshot-file", snapshot_was_taken, p_mi );
 509
 510     /* No need for lock_input() because no other threads knows us anymore */
 511     if( p_mi->input.p_thread )
 512         release_input_thread(p_mi, true);
 513     if( p_mi->input.p_resource )
 514     {
 515         input_resource_Terminate( p_mi->input.p_resource );
 516         input_resource_Release( p_mi->input.p_resource );
 517         p_mi->input.p_resource = NULL;
 518     }
 519     vlc_mutex_destroy( &p_mi->input.lock );
 520
 521     libvlc_event_manager_release( p_mi->p_event_manager );
 522     libvlc_media_release( p_mi->p_md );
 523     vlc_mutex_destroy( &p_mi->object_lock );
 524
 525     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 526     vlc_object_release( p_mi );
 527     libvlc_release(instance);
 528 }
 529
 530 /**************************************************************************
 531  * Release a Media Instance object.
 532  *
 533  * Function does the locking.
 534  **************************************************************************/
 535 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 536 {
 537     bool destroy;
 538
 539     assert( p_mi );
 540     lock(p_mi);
 541     destroy = !--p_mi->i_refcount;
 542     unlock(p_mi);
 543
 544     if( destroy )
 545         libvlc_media_player_destroy( p_mi );
 546 }
 547
 548 /**************************************************************************
 549  * Retain a Media Instance object.
 550  *
 551  * Caller must hold the lock.
 552  **************************************************************************/
 553 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 554 {
 555     assert( p_mi );
 556
 557     lock(p_mi);
 558     p_mi->i_refcount++;
 559     unlock(p_mi);
 560 }
 561
 562 /**************************************************************************
 563  * Set the Media descriptor associated with the instance.
 564  *
 565  * Enter without lock -- function will lock the object.
 566  **************************************************************************/
 567 void libvlc_media_player_set_media(
 568                             libvlc_media_player_t *p_mi,
 569                             libvlc_media_t *p_md )
 570 {
 571     lock_input(p_mi);
 572
 573     /* FIXME I am not sure if it is a user request or on die(eof/error)
 574      * request here */
 575     release_input_thread( p_mi,
 576                           p_mi->input.p_thread &&
 577                           !p_mi->input.p_thread->b_eof &&
 578                           !p_mi->input.p_thread->b_error );
 579
 580     lock( p_mi );
 581     set_state( p_mi, libvlc_NothingSpecial, true );
 582     unlock_input( p_mi );
 583
 584     libvlc_media_release( p_mi->p_md );
 585
 586     if( !p_md )
 587     {
 588         p_mi->p_md = NULL;
 589         unlock(p_mi);
 590         return; /* It is ok to pass a NULL md */
 591     }
 592
 593     libvlc_media_retain( p_md );
 594     p_mi->p_md = p_md;
 595
 596     /* The policy here is to ignore that we were created using a different
 597      * libvlc_instance, because we don't really care */
 598     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 599
 600     unlock(p_mi);
 601
 602     /* Send an event for the newly available media */
 603     libvlc_event_t event;
 604     event.type = libvlc_MediaPlayerMediaChanged;
 605     event.u.media_player_media_changed.new_media = p_md;
 606     libvlc_event_send( p_mi->p_event_manager, &event );
 607
 608 }
 609
 610 /**************************************************************************
 611  * Get the Media descriptor associated with the instance.
 612  **************************************************************************/
 613 libvlc_media_t *
 614 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 615 {
 616     libvlc_media_t *p_m;
 617
 618     lock(p_mi);
 619     p_m = p_mi->p_md;
 620     if( p_m )
 621         libvlc_media_retain( p_mi->p_md );
 622     unlock(p_mi);
 623     return p_mi->p_md;
 624 }
 625
 626 /**************************************************************************
 627  * Get the event Manager.
 628  **************************************************************************/
 629 libvlc_event_manager_t *
 630 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 631 {
 632     return p_mi->p_event_manager;
 633 }
 634
 635 /**************************************************************************
 636  * Tell media player to start playing.
 637  **************************************************************************/
 638 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 639 {
 640     lock_input( p_mi );
 641
 642     input_thread_t *p_input_thread = p_mi->input.p_thread;
 643     if( p_input_thread )
 644     {
 645         /* A thread already exists, send it a play message */
 646         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 647         unlock_input( p_mi );
 648         return 0;
 649     }
 650
 651     /* Ignore previous exception */
 652     lock(p_mi);
 653
 654     if( !p_mi->p_md )
 655     {
 656         unlock(p_mi);
 657         unlock_input( p_mi );
 658         libvlc_printerr( "No associated media descriptor" );
 659         return -1;
 660     }
 661
 662     if( !p_mi->input.p_resource )
 663         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 664     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 665                                    p_mi->input.p_resource );
 666     unlock(p_mi);
 667     if( !p_input_thread )
 668     {
 669         unlock_input(p_mi);
 670         libvlc_printerr( "Not enough memory" );
 671         return -1;
 672     }
 673
 674     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 675     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 676     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 677
 678     if( input_Start( p_input_thread ) )
 679     {
 680         unlock_input(p_mi);
 681         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 682         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 683         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 684         vlc_object_release( p_input_thread );
 685         libvlc_printerr( "Input initialization failure" );
 686         return -1;
 687     }
 688     p_mi->input.p_thread = p_input_thread;
 689     unlock_input(p_mi);
 690     return 0;
 691 }
 692
 693 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 694 {
 695     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 696     if( !p_input_thread )
 697         return;
 698
 699     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 700     if( state == libvlc_Playing || state == libvlc_Buffering )
 701     {
 702         if( paused )
 703         {
 704             if( libvlc_media_player_can_pause( p_mi ) )
 705                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 706             else
 707                 libvlc_media_player_stop( p_mi );
 708         }
 709     }
 710     else
 711     {
 712         if( !paused )
 713             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 714     }
 715
 716     vlc_object_release( p_input_thread );
 717 }
 718
 719 /**************************************************************************
 720  * Toggle pause.
 721  **************************************************************************/
 722 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 723 {
 724     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 725     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 726
 727     libvlc_media_player_set_pause( p_mi, playing );
 728 }
 729
 730 /**************************************************************************
 731  * Tells whether the media player is currently playing.
 732  *
 733  * Enter with lock held.
 734  **************************************************************************/
 735 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 736 {
 737     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 738     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 739 }
 740
 741 /**************************************************************************
 742  * Stop playing.
 743  **************************************************************************/
 744 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 745 {
 746     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 747
 748     lock_input(p_mi);
 749     release_input_thread( p_mi, true ); /* This will stop the input thread */
 750
 751     /* Force to go to stopped state, in case we were in Ended, or Error
 752      * state. */
 753     if( state != libvlc_Stopped )
 754     {
 755         set_state( p_mi, libvlc_Stopped, false );
 756
 757         /* Construct and send the event */
 758         libvlc_event_t event;
 759         event.type = libvlc_MediaPlayerStopped;
 760         libvlc_event_send( p_mi->p_event_manager, &event );
 761     }
 762
 763     if( p_mi->input.p_resource != NULL )
 764         input_resource_TerminateVout( p_mi->input.p_resource );
 765     unlock_input(p_mi);
 766 }
 767
 768 /**************************************************************************
 769  * set_nsobject
 770  **************************************************************************/
 771 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 772                                         void * drawable )
 773 {
 774     assert (p_mi != NULL);
 775 #ifdef __APPLE__
 776     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 777 #else
 778     (void) p_mi; (void)drawable;
 779 #endif
 780 }
 781
 782 /**************************************************************************
 783  * get_nsobject
 784  **************************************************************************/
 785 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 786 {
 787     assert (p_mi != NULL);
 788 #ifdef __APPLE__
 789     return var_GetAddress (p_mi, "drawable-nsobject");
 790 #else
 791     return NULL;
 792 #endif
 793 }
 794
 795 /**************************************************************************
 796  * set_agl
 797  **************************************************************************/
 798 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 799                                   uint32_t drawable )
 800 {
 801 #ifdef __APPLE__
 802     var_SetInteger (p_mi, "drawable-agl", drawable);
 803 #else
 804     (void) p_mi; (void)drawable;
 805 #endif
 806 }
 807
 808 /**************************************************************************
 809  * get_agl
 810  **************************************************************************/
 811 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 812 {
 813     assert (p_mi != NULL);
 814 #ifdef __APPLE__
 815     return var_GetInteger (p_mi, "drawable-agl");
 816 #else
 817     return 0;
 818 #endif
 819 }
 820
 821 /**************************************************************************
 822  * set_xwindow
 823  **************************************************************************/
 824 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 825                                       uint32_t drawable )
 826 {
 827     assert (p_mi != NULL);
 828     var_SetInteger (p_mi, "drawable-xid", drawable);
 829 }
 830
 831 /**************************************************************************
 832  * get_xwindow
 833  **************************************************************************/
 834 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 835 {
 836     return var_GetInteger (p_mi, "drawable-xid");
 837 }
 838
 839 /**************************************************************************
 840  * set_hwnd
 841  **************************************************************************/
 842 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 843                                    void *drawable )
 844 {
 845     assert (p_mi != NULL);
 846 #ifdef WIN32
 847     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 848 #else
 849     (void) p_mi; (void) drawable;
 850 #endif
 851 }
 852
 853 /**************************************************************************
 854  * get_hwnd
 855  **************************************************************************/
 856 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 857 {
 858     assert (p_mi != NULL);
 859 #ifdef WIN32
 860     return var_GetAddress (p_mi, "drawable-hwnd");
 861 #else
 862     return NULL;
 863 #endif
 864 }
 865
 866 /**************************************************************************
 867  * Getters for stream information
 868  **************************************************************************/
 869 libvlc_time_t libvlc_media_player_get_length(
 870                              libvlc_media_player_t *p_mi )
 871 {
 872     input_thread_t *p_input_thread;
 873     libvlc_time_t i_time;
 874
 875     p_input_thread = libvlc_get_input_thread ( p_mi );
 876     if( !p_input_thread )
 877         return -1;
 878
 879     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 880     vlc_object_release( p_input_thread );
 881
 882     return i_time;
 883 }
 884
 885 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 886 {
 887     input_thread_t *p_input_thread;
 888     libvlc_time_t i_time;
 889
 890     p_input_thread = libvlc_get_input_thread ( p_mi );
 891     if( !p_input_thread )
 892         return -1;
 893
 894     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 895     vlc_object_release( p_input_thread );
 896     return i_time;
 897 }
 898
 899 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 900                                    libvlc_time_t i_time )
 901 {
 902     input_thread_t *p_input_thread;
 903
 904     p_input_thread = libvlc_get_input_thread ( p_mi );
 905     if( !p_input_thread )
 906         return;
 907
 908     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 909     vlc_object_release( p_input_thread );
 910 }
 911
 912 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 913                                        float position )
 914 {
 915     input_thread_t *p_input_thread;
 916
 917     p_input_thread = libvlc_get_input_thread ( p_mi );
 918     if( !p_input_thread )
 919         return;
 920
 921     var_SetFloat( p_input_thread, "position", position );
 922     vlc_object_release( p_input_thread );
 923 }
 924
 925 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 926 {
 927     input_thread_t *p_input_thread;
 928     float f_position;
 929
 930     p_input_thread = libvlc_get_input_thread ( p_mi );
 931     if( !p_input_thread )
 932         return -1.0;
 933
 934     f_position = var_GetFloat( p_input_thread, "position" );
 935     vlc_object_release( p_input_thread );
 936
 937     return f_position;
 938 }
 939
 940 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
 941                                       int chapter )
 942 {
 943     input_thread_t *p_input_thread;
 944
 945     p_input_thread = libvlc_get_input_thread ( p_mi );
 946     if( !p_input_thread )
 947         return;
 948
 949     var_SetInteger( p_input_thread, "chapter", chapter );
 950     vlc_object_release( p_input_thread );
 951 }
 952
 953 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
 954 {
 955     input_thread_t *p_input_thread;
 956     int i_chapter;
 957
 958     p_input_thread = libvlc_get_input_thread ( p_mi );
 959     if( !p_input_thread )
 960         return -1;
 961
 962     i_chapter = var_GetInteger( p_input_thread, "chapter" );
 963     vlc_object_release( p_input_thread );
 964
 965     return i_chapter;
 966 }
 967
 968 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
 969 {
 970     input_thread_t *p_input_thread;
 971     vlc_value_t val;
 972
 973     p_input_thread = libvlc_get_input_thread ( p_mi );
 974     if( !p_input_thread )
 975         return -1;
 976
 977     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
 978     vlc_object_release( p_input_thread );
 979
 980     return val.i_int;
 981 }
 982
 983 int libvlc_media_player_get_chapter_count_for_title(
 984                                  libvlc_media_player_t *p_mi,
 985                                  int i_title )
 986 {
 987     input_thread_t *p_input_thread;
 988     vlc_value_t val;
 989
 990     p_input_thread = libvlc_get_input_thread ( p_mi );
 991     if( !p_input_thread )
 992         return -1;
 993
 994     char *psz_name;
 995     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
 996     {
 997         vlc_object_release( p_input_thread );
 998         return -1;
 999     }
1000     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1001     vlc_object_release( p_input_thread );
1002     free( psz_name );
1003
1004     return val.i_int;
1005 }
1006
1007 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1008                                     int i_title )
1009 {
1010     input_thread_t *p_input_thread;
1011
1012     p_input_thread = libvlc_get_input_thread ( p_mi );
1013     if( !p_input_thread )
1014         return;
1015
1016     var_SetInteger( p_input_thread, "title", i_title );
1017     vlc_object_release( p_input_thread );
1018
1019     //send event
1020     libvlc_event_t event;
1021     event.type = libvlc_MediaPlayerTitleChanged;
1022     event.u.media_player_title_changed.new_title = i_title;
1023     libvlc_event_send( p_mi->p_event_manager, &event );
1024 }
1025
1026 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1027 {
1028     input_thread_t *p_input_thread;
1029     int i_title;
1030
1031     p_input_thread = libvlc_get_input_thread ( p_mi );
1032     if( !p_input_thread )
1033         return -1;
1034
1035     i_title = var_GetInteger( p_input_thread, "title" );
1036     vlc_object_release( p_input_thread );
1037
1038     return i_title;
1039 }
1040
1041 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1042 {
1043     input_thread_t *p_input_thread;
1044     vlc_value_t val;
1045
1046     p_input_thread = libvlc_get_input_thread ( p_mi );
1047     if( !p_input_thread )
1048         return -1;
1049
1050     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1051     vlc_object_release( p_input_thread );
1052
1053     return val.i_int;
1054 }
1055
1056 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1057 {
1058     input_thread_t *p_input_thread;
1059
1060     p_input_thread = libvlc_get_input_thread ( p_mi );
1061     if( !p_input_thread )
1062         return;
1063
1064     int i_type = var_Type( p_input_thread, "next-chapter" );
1065     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1066                             "next-chapter":"next-title", true );
1067
1068     vlc_object_release( p_input_thread );
1069 }
1070
1071 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1072 {
1073     input_thread_t *p_input_thread;
1074
1075     p_input_thread = libvlc_get_input_thread ( p_mi );
1076     if( !p_input_thread )
1077         return;
1078
1079     int i_type = var_Type( p_input_thread, "next-chapter" );
1080     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1081                             "prev-chapter":"prev-title", true );
1082
1083     vlc_object_release( p_input_thread );
1084 }
1085
1086 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1087 {
1088     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1089     double f_fps = 0.0;
1090
1091     if( p_input_thread )
1092     {
1093         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1094             f_fps = 0.0;
1095         vlc_object_release( p_input_thread );
1096     }
1097     return f_fps;
1098 }
1099
1100 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1101 {
1102     bool b_will_play;
1103     input_thread_t *p_input_thread =
1104                             libvlc_get_input_thread ( p_mi );
1105     if ( !p_input_thread )
1106         return false;
1107
1108     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1109     vlc_object_release( p_input_thread );
1110
1111     return b_will_play;
1112 }
1113
1114 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1115 {
1116     if (rate < 0.)
1117     {
1118         libvlc_printerr ("Playing backward not supported");
1119         return -1;
1120     }
1121
1122     var_SetFloat (p_mi, "rate", rate);
1123
1124     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1125     if( !p_input_thread )
1126         return 0;
1127     var_SetFloat( p_input_thread, "rate", rate );
1128     vlc_object_release( p_input_thread );
1129     return 0;
1130 }
1131
1132 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1133 {
1134     return var_GetFloat (p_mi, "rate");
1135 }
1136
1137 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1138 {
1139     lock(p_mi);
1140     libvlc_state_t state = p_mi->state;
1141     unlock(p_mi);
1142     return state;
1143 }
1144
1145 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1146 {
1147     input_thread_t *p_input_thread;
1148     bool b_seekable;
1149
1150     p_input_thread = libvlc_get_input_thread ( p_mi );
1151     if ( !p_input_thread )
1152         return false;
1153     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1154     vlc_object_release( p_input_thread );
1155
1156     return b_seekable;
1157 }
1158
1159 /* internal function, used by audio, video */
1160 libvlc_track_description_t *
1161         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1162                                       const char *psz_variable )
1163 {
1164     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1165     libvlc_track_description_t *p_track_description = NULL,
1166                                *p_actual, *p_previous;
1167
1168     if( !p_input )
1169         return NULL;
1170
1171     vlc_value_t val_list, text_list;
1172     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1173
1174     /* no tracks */
1175     if( val_list.p_list->i_count <= 0 )
1176         goto end;
1177
1178     p_track_description = ( libvlc_track_description_t * )
1179         malloc( sizeof( libvlc_track_description_t ) );
1180     if ( !p_track_description )
1181     {
1182         libvlc_printerr( "Not enough memory" );
1183         goto end;
1184     }
1185     p_actual = p_track_description;
1186     p_previous = NULL;
1187     for( int i = 0; i < val_list.p_list->i_count; i++ )
1188     {
1189         if( !p_actual )
1190         {
1191             p_actual = ( libvlc_track_description_t * )
1192                 malloc( sizeof( libvlc_track_description_t ) );
1193             if ( !p_actual )
1194             {
1195                 libvlc_track_description_release( p_track_description );
1196                 libvlc_printerr( "Not enough memory" );
1197                 goto end;
1198             }
1199         }
1200         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1201         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1202         p_actual->p_next = NULL;
1203         if( p_previous )
1204             p_previous->p_next = p_actual;
1205         p_previous = p_actual;
1206         p_actual =  NULL;
1207     }
1208
1209 end:
1210     var_FreeList( &val_list, &text_list );
1211     vlc_object_release( p_input );
1212
1213     return p_track_description;
1214 }
1215
1216 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1217 {
1218     libvlc_track_description_t *p_actual, *p_before;
1219     p_actual = p_td;
1220
1221     while ( p_actual )
1222     {
1223         free( p_actual->psz_name );
1224         p_before = p_actual;
1225         p_actual = p_before->p_next;
1226         free( p_before );
1227     }
1228 }
1229
1230 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1231 {
1232     input_thread_t *p_input_thread;
1233     bool b_can_pause;
1234
1235     p_input_thread = libvlc_get_input_thread ( p_mi );
1236     if ( !p_input_thread )
1237         return false;
1238     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1239     vlc_object_release( p_input_thread );
1240
1241     return b_can_pause;
1242 }
1243
1244 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1245 {
1246     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1247     if( p_input_thread != NULL )
1248     {
1249         var_TriggerCallback( p_input_thread, "frame-next" );
1250         vlc_object_release( p_input_thread );
1251     }
1252 }