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 /**************************************************************************
 694  * Pause.
 695  **************************************************************************/
 696 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 697 {
 698     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 699     if( !p_input_thread )
 700         return;
 701
 702     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 703     if( state == libvlc_Playing || state == libvlc_Buffering )
 704     {
 705         if( libvlc_media_player_can_pause( p_mi ) )
 706             input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 707         else
 708             libvlc_media_player_stop( p_mi );
 709     }
 710     else
 711         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 712
 713     vlc_object_release( p_input_thread );
 714 }
 715
 716 /**************************************************************************
 717  * Tells whether the media player is currently playing.
 718  *
 719  * Enter with lock held.
 720  **************************************************************************/
 721 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 722 {
 723     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 724     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 725 }
 726
 727 /**************************************************************************
 728  * Stop playing.
 729  **************************************************************************/
 730 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 731 {
 732     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 733
 734     lock_input(p_mi);
 735     release_input_thread( p_mi, true ); /* This will stop the input thread */
 736
 737     /* Force to go to stopped state, in case we were in Ended, or Error
 738      * state. */
 739     if( state != libvlc_Stopped )
 740     {
 741         set_state( p_mi, libvlc_Stopped, false );
 742
 743         /* Construct and send the event */
 744         libvlc_event_t event;
 745         event.type = libvlc_MediaPlayerStopped;
 746         libvlc_event_send( p_mi->p_event_manager, &event );
 747     }
 748
 749     if( p_mi->input.p_resource != NULL )
 750         input_resource_TerminateVout( p_mi->input.p_resource );
 751     unlock_input(p_mi);
 752 }
 753
 754 /**************************************************************************
 755  * set_nsobject
 756  **************************************************************************/
 757 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 758                                         void * drawable )
 759 {
 760     assert (p_mi != NULL);
 761 #ifdef __APPLE__
 762     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 763 #else
 764     (void) p_mi; (void)drawable;
 765 #endif
 766 }
 767
 768 /**************************************************************************
 769  * get_nsobject
 770  **************************************************************************/
 771 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 772 {
 773     assert (p_mi != NULL);
 774 #ifdef __APPLE__
 775     return var_GetAddress (p_mi, "drawable-nsobject");
 776 #else
 777     return NULL;
 778 #endif
 779 }
 780
 781 /**************************************************************************
 782  * set_agl
 783  **************************************************************************/
 784 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 785                                   uint32_t drawable )
 786 {
 787 #ifdef __APPLE__
 788     var_SetInteger (p_mi, "drawable-agl", drawable);
 789 #else
 790     (void) p_mi; (void)drawable;
 791 #endif
 792 }
 793
 794 /**************************************************************************
 795  * get_agl
 796  **************************************************************************/
 797 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 798 {
 799     assert (p_mi != NULL);
 800 #ifdef __APPLE__
 801     return var_GetInteger (p_mi, "drawable-agl");
 802 #else
 803     return 0;
 804 #endif
 805 }
 806
 807 /**************************************************************************
 808  * set_xwindow
 809  **************************************************************************/
 810 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 811                                       uint32_t drawable )
 812 {
 813     assert (p_mi != NULL);
 814     var_SetInteger (p_mi, "drawable-xid", drawable);
 815 }
 816
 817 /**************************************************************************
 818  * get_xwindow
 819  **************************************************************************/
 820 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 821 {
 822     return var_GetInteger (p_mi, "drawable-xid");
 823 }
 824
 825 /**************************************************************************
 826  * set_hwnd
 827  **************************************************************************/
 828 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 829                                    void *drawable )
 830 {
 831     assert (p_mi != NULL);
 832 #ifdef WIN32
 833     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 834 #else
 835     (void) p_mi; (void) drawable;
 836 #endif
 837 }
 838
 839 /**************************************************************************
 840  * get_hwnd
 841  **************************************************************************/
 842 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 843 {
 844     assert (p_mi != NULL);
 845 #ifdef WIN32
 846     return var_GetAddress (p_mi, "drawable-hwnd");
 847 #else
 848     return NULL;
 849 #endif
 850 }
 851
 852 /**************************************************************************
 853  * Getters for stream information
 854  **************************************************************************/
 855 libvlc_time_t libvlc_media_player_get_length(
 856                              libvlc_media_player_t *p_mi )
 857 {
 858     input_thread_t *p_input_thread;
 859     libvlc_time_t i_time;
 860
 861     p_input_thread = libvlc_get_input_thread ( p_mi );
 862     if( !p_input_thread )
 863         return -1;
 864
 865     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 866     vlc_object_release( p_input_thread );
 867
 868     return i_time;
 869 }
 870
 871 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 872 {
 873     input_thread_t *p_input_thread;
 874     libvlc_time_t i_time;
 875
 876     p_input_thread = libvlc_get_input_thread ( p_mi );
 877     if( !p_input_thread )
 878         return -1;
 879
 880     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 881     vlc_object_release( p_input_thread );
 882     return i_time;
 883 }
 884
 885 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 886                                    libvlc_time_t i_time )
 887 {
 888     input_thread_t *p_input_thread;
 889
 890     p_input_thread = libvlc_get_input_thread ( p_mi );
 891     if( !p_input_thread )
 892         return;
 893
 894     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 895     vlc_object_release( p_input_thread );
 896 }
 897
 898 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 899                                        float position )
 900 {
 901     input_thread_t *p_input_thread;
 902
 903     p_input_thread = libvlc_get_input_thread ( p_mi );
 904     if( !p_input_thread )
 905         return;
 906
 907     var_SetFloat( p_input_thread, "position", position );
 908     vlc_object_release( p_input_thread );
 909 }
 910
 911 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 912 {
 913     input_thread_t *p_input_thread;
 914     float f_position;
 915
 916     p_input_thread = libvlc_get_input_thread ( p_mi );
 917     if( !p_input_thread )
 918         return -1.0;
 919
 920     f_position = var_GetFloat( p_input_thread, "position" );
 921     vlc_object_release( p_input_thread );
 922
 923     return f_position;
 924 }
 925
 926 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
 927                                       int chapter )
 928 {
 929     input_thread_t *p_input_thread;
 930
 931     p_input_thread = libvlc_get_input_thread ( p_mi );
 932     if( !p_input_thread )
 933         return;
 934
 935     var_SetInteger( p_input_thread, "chapter", chapter );
 936     vlc_object_release( p_input_thread );
 937 }
 938
 939 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
 940 {
 941     input_thread_t *p_input_thread;
 942     int i_chapter;
 943
 944     p_input_thread = libvlc_get_input_thread ( p_mi );
 945     if( !p_input_thread )
 946         return -1;
 947
 948     i_chapter = var_GetInteger( p_input_thread, "chapter" );
 949     vlc_object_release( p_input_thread );
 950
 951     return i_chapter;
 952 }
 953
 954 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
 955 {
 956     input_thread_t *p_input_thread;
 957     vlc_value_t val;
 958
 959     p_input_thread = libvlc_get_input_thread ( p_mi );
 960     if( !p_input_thread )
 961         return -1;
 962
 963     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
 964     vlc_object_release( p_input_thread );
 965
 966     return val.i_int;
 967 }
 968
 969 int libvlc_media_player_get_chapter_count_for_title(
 970                                  libvlc_media_player_t *p_mi,
 971                                  int i_title )
 972 {
 973     input_thread_t *p_input_thread;
 974     vlc_value_t val;
 975
 976     p_input_thread = libvlc_get_input_thread ( p_mi );
 977     if( !p_input_thread )
 978         return -1;
 979
 980     char *psz_name;
 981     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
 982     {
 983         vlc_object_release( p_input_thread );
 984         return -1;
 985     }
 986     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
 987     vlc_object_release( p_input_thread );
 988     free( psz_name );
 989
 990     return val.i_int;
 991 }
 992
 993 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
 994                                     int i_title )
 995 {
 996     input_thread_t *p_input_thread;
 997
 998     p_input_thread = libvlc_get_input_thread ( p_mi );
 999     if( !p_input_thread )
1000         return;
1001
1002     var_SetInteger( p_input_thread, "title", i_title );
1003     vlc_object_release( p_input_thread );
1004
1005     //send event
1006     libvlc_event_t event;
1007     event.type = libvlc_MediaPlayerTitleChanged;
1008     event.u.media_player_title_changed.new_title = i_title;
1009     libvlc_event_send( p_mi->p_event_manager, &event );
1010 }
1011
1012 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1013 {
1014     input_thread_t *p_input_thread;
1015     int i_title;
1016
1017     p_input_thread = libvlc_get_input_thread ( p_mi );
1018     if( !p_input_thread )
1019         return -1;
1020
1021     i_title = var_GetInteger( p_input_thread, "title" );
1022     vlc_object_release( p_input_thread );
1023
1024     return i_title;
1025 }
1026
1027 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1028 {
1029     input_thread_t *p_input_thread;
1030     vlc_value_t val;
1031
1032     p_input_thread = libvlc_get_input_thread ( p_mi );
1033     if( !p_input_thread )
1034         return -1;
1035
1036     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1037     vlc_object_release( p_input_thread );
1038
1039     return val.i_int;
1040 }
1041
1042 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1043 {
1044     input_thread_t *p_input_thread;
1045
1046     p_input_thread = libvlc_get_input_thread ( p_mi );
1047     if( !p_input_thread )
1048         return;
1049
1050     int i_type = var_Type( p_input_thread, "next-chapter" );
1051     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1052                             "next-chapter":"next-title", true );
1053
1054     vlc_object_release( p_input_thread );
1055 }
1056
1057 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1058 {
1059     input_thread_t *p_input_thread;
1060
1061     p_input_thread = libvlc_get_input_thread ( p_mi );
1062     if( !p_input_thread )
1063         return;
1064
1065     int i_type = var_Type( p_input_thread, "next-chapter" );
1066     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1067                             "prev-chapter":"prev-title", true );
1068
1069     vlc_object_release( p_input_thread );
1070 }
1071
1072 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1073 {
1074     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1075     double f_fps = 0.0;
1076
1077     if( p_input_thread )
1078     {
1079         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1080             f_fps = 0.0;
1081         vlc_object_release( p_input_thread );
1082     }
1083     return f_fps;
1084 }
1085
1086 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1087 {
1088     bool b_will_play;
1089     input_thread_t *p_input_thread =
1090                             libvlc_get_input_thread ( p_mi );
1091     if ( !p_input_thread )
1092         return false;
1093
1094     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1095     vlc_object_release( p_input_thread );
1096
1097     return b_will_play;
1098 }
1099
1100 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1101 {
1102     if (rate < 0.)
1103     {
1104         libvlc_printerr ("Playing backward not supported");
1105         return -1;
1106     }
1107
1108     var_SetFloat (p_mi, "rate", rate);
1109
1110     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1111     if( !p_input_thread )
1112         return 0;
1113     var_SetFloat( p_input_thread, "rate", rate );
1114     vlc_object_release( p_input_thread );
1115     return 0;
1116 }
1117
1118 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1119 {
1120     return var_GetFloat (p_mi, "rate");
1121 }
1122
1123 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1124 {
1125     lock(p_mi);
1126     libvlc_state_t state = p_mi->state;
1127     unlock(p_mi);
1128     return state;
1129 }
1130
1131 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1132 {
1133     input_thread_t *p_input_thread;
1134     bool b_seekable;
1135
1136     p_input_thread = libvlc_get_input_thread ( p_mi );
1137     if ( !p_input_thread )
1138         return false;
1139     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1140     vlc_object_release( p_input_thread );
1141
1142     return b_seekable;
1143 }
1144
1145 /* internal function, used by audio, video */
1146 libvlc_track_description_t *
1147         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1148                                       const char *psz_variable )
1149 {
1150     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1151     libvlc_track_description_t *p_track_description = NULL,
1152                                *p_actual, *p_previous;
1153
1154     if( !p_input )
1155         return NULL;
1156
1157     vlc_value_t val_list, text_list;
1158     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1159
1160     /* no tracks */
1161     if( val_list.p_list->i_count <= 0 )
1162         goto end;
1163
1164     p_track_description = ( libvlc_track_description_t * )
1165         malloc( sizeof( libvlc_track_description_t ) );
1166     if ( !p_track_description )
1167     {
1168         libvlc_printerr( "Not enough memory" );
1169         goto end;
1170     }
1171     p_actual = p_track_description;
1172     p_previous = NULL;
1173     for( int i = 0; i < val_list.p_list->i_count; i++ )
1174     {
1175         if( !p_actual )
1176         {
1177             p_actual = ( libvlc_track_description_t * )
1178                 malloc( sizeof( libvlc_track_description_t ) );
1179             if ( !p_actual )
1180             {
1181                 libvlc_track_description_release( p_track_description );
1182                 libvlc_printerr( "Not enough memory" );
1183                 goto end;
1184             }
1185         }
1186         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1187         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1188         p_actual->p_next = NULL;
1189         if( p_previous )
1190             p_previous->p_next = p_actual;
1191         p_previous = p_actual;
1192         p_actual =  NULL;
1193     }
1194
1195 end:
1196     var_FreeList( &val_list, &text_list );
1197     vlc_object_release( p_input );
1198
1199     return p_track_description;
1200 }
1201
1202 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1203 {
1204     libvlc_track_description_t *p_actual, *p_before;
1205     p_actual = p_td;
1206
1207     while ( p_actual )
1208     {
1209         free( p_actual->psz_name );
1210         p_before = p_actual;
1211         p_actual = p_before->p_next;
1212         free( p_before );
1213     }
1214 }
1215
1216 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1217 {
1218     input_thread_t *p_input_thread;
1219     bool b_can_pause;
1220
1221     p_input_thread = libvlc_get_input_thread ( p_mi );
1222     if ( !p_input_thread )
1223         return false;
1224     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1225     vlc_object_release( p_input_thread );
1226
1227     return b_can_pause;
1228 }
1229
1230 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1231 {
1232     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1233     if( p_input_thread != NULL )
1234     {
1235         var_TriggerCallback( p_input_thread, "frame-next" );
1236         vlc_object_release( p_input_thread );
1237     }
1238 }