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, "vout", VLC_VAR_STRING|VLC_VAR_DOINHERIT);
 371     var_Create (mp, "window", VLC_VAR_STRING);
 372     var_Create (mp, "vmem-lock", VLC_VAR_ADDRESS);
 373     var_Create (mp, "vmem-unlock", VLC_VAR_ADDRESS);
 374     var_Create (mp, "vmem-display", VLC_VAR_ADDRESS);
 375     var_Create (mp, "vmem-data", VLC_VAR_ADDRESS);
 376     var_Create (mp, "vmem-chroma", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 377     var_Create (mp, "vmem-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 378     var_Create (mp, "vmem-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 379     var_Create (mp, "vmem-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 380     var_Create (mp, "drawable-xid", VLC_VAR_INTEGER);
 381 #ifdef WIN32
 382     var_Create (mp, "drawable-hwnd", VLC_VAR_ADDRESS);
 383 #endif
 384 #ifdef __APPLE__
 385     var_Create (mp, "drawable-agl", VLC_VAR_INTEGER);
 386     var_Create (mp, "drawable-nsobject", VLC_VAR_ADDRESS);
 387 #endif
 388
 389     var_Create (mp, "keyboard-events", VLC_VAR_BOOL);
 390     var_SetBool (mp, "keyboard-events", true);
 391     var_Create (mp, "mouse-events", VLC_VAR_BOOL);
 392     var_SetBool (mp, "mouse-events", true);
 393
 394     var_Create (mp, "fullscreen", VLC_VAR_BOOL);
 395     var_Create (mp, "autoscale", VLC_VAR_BOOL);
 396     var_SetBool (mp, "autoscale", true);
 397     var_Create (mp, "scale", VLC_VAR_FLOAT);
 398     var_SetFloat (mp, "scale", 1.);
 399     var_Create (mp, "aspect-ratio", VLC_VAR_STRING);
 400     var_Create (mp, "crop", VLC_VAR_STRING);
 401     var_Create (mp, "deinterlace", VLC_VAR_INTEGER);
 402     var_Create (mp, "deinterlace-mode", VLC_VAR_STRING);
 403
 404     var_Create (mp, "vbi-page", VLC_VAR_INTEGER);
 405
 406     var_Create (mp, "marq-marquee", VLC_VAR_STRING);
 407     var_Create (mp, "marq-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 408     var_Create (mp, "marq-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 409     var_Create (mp, "marq-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 410     var_Create (mp, "marq-refresh", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 411     var_Create (mp, "marq-size", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 412     var_Create (mp, "marq-timeout", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 413     var_Create (mp, "marq-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 414     var_Create (mp, "marq-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 415
 416     var_Create (mp, "logo-file", VLC_VAR_STRING);
 417     var_Create (mp, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 418     var_Create (mp, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 419     var_Create (mp, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 420     var_Create (mp, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 421     var_Create (mp, "logo-opacity", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 422     var_Create (mp, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 423
 424     var_Create (mp, "contrast", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 425     var_Create (mp, "brightness", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 426     var_Create (mp, "hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
 427     var_Create (mp, "saturation", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 428     var_Create (mp, "gamma", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT);
 429
 430      /* Audio */
 431     var_Create (mp, "aout", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
 432     var_Create (mp, "volume-muted", VLC_VAR_BOOL);
 433     var_Create (mp, "saved-volume", VLC_VAR_INTEGER);
 434     var_Create (mp, "volume-change", VLC_VAR_VOID);
 435     var_Create (mp, "find-input-callback", VLC_VAR_ADDRESS);
 436     var_SetAddress (mp, "find-input-callback", find_input);
 437
 438     mp->p_md = NULL;
 439     mp->state = libvlc_NothingSpecial;
 440     mp->p_libvlc_instance = instance;
 441     mp->input.p_thread = NULL;
 442     mp->input.p_resource = NULL;
 443     vlc_mutex_init (&mp->input.lock);
 444     mp->i_refcount = 1;
 445     mp->p_event_manager = libvlc_event_manager_new(mp, instance);
 446     if (unlikely(mp->p_event_manager == NULL))
 447     {
 448         vlc_object_release(mp);
 449         return NULL;
 450     }
 451     vlc_mutex_init(&mp->object_lock);
 452
 453     register_event(mp, NothingSpecial);
 454     register_event(mp, Opening);
 455     register_event(mp, Buffering);
 456     register_event(mp, Playing);
 457     register_event(mp, Paused);
 458     register_event(mp, Stopped);
 459     register_event(mp, Forward);
 460     register_event(mp, Backward);
 461     register_event(mp, EndReached);
 462     register_event(mp, EncounteredError);
 463     register_event(mp, SeekableChanged);
 464
 465     register_event(mp, PositionChanged);
 466     register_event(mp, TimeChanged);
 467     register_event(mp, LengthChanged);
 468     register_event(mp, TitleChanged);
 469     register_event(mp, PausableChanged);
 470
 471     /* Snapshot initialization */
 472     register_event(mp, SnapshotTaken);
 473
 474     register_event(mp, MediaChanged);
 475
 476     /* Attach a var callback to the global object to provide the glue between
 477      * vout_thread that generates the event and media_player that re-emits it
 478      * with its own event manager
 479      *
 480      * FIXME: It's unclear why we want to put this in public API, and why we
 481      * want to expose it in such a limiting and ugly way.
 482      */
 483     var_AddCallback(mp->p_libvlc, "snapshot-file", snapshot_was_taken, mp);
 484
 485     libvlc_retain(instance);
 486     return mp;
 487 }
 488
 489 /**************************************************************************
 490  * Create a Media Instance object with a media descriptor.
 491  **************************************************************************/
 492 libvlc_media_player_t *
 493 libvlc_media_player_new_from_media( libvlc_media_t * p_md )
 494 {
 495     libvlc_media_player_t * p_mi;
 496
 497     p_mi = libvlc_media_player_new( p_md->p_libvlc_instance );
 498     if( !p_mi )
 499         return NULL;
 500
 501     libvlc_media_retain( p_md );
 502     p_mi->p_md = p_md;
 503
 504     return p_mi;
 505 }
 506
 507 /**************************************************************************
 508  * Destroy a Media Instance object (libvlc internal)
 509  *
 510  * Warning: No lock held here, but hey, this is internal. Caller must lock.
 511  **************************************************************************/
 512 static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
 513 {
 514     assert( p_mi );
 515
 516     /* Detach Callback from the main libvlc object */
 517     var_DelCallback( p_mi->p_libvlc,
 518                      "snapshot-file", snapshot_was_taken, p_mi );
 519
 520     /* No need for lock_input() because no other threads knows us anymore */
 521     if( p_mi->input.p_thread )
 522         release_input_thread(p_mi, true);
 523     if( p_mi->input.p_resource )
 524     {
 525         input_resource_Terminate( p_mi->input.p_resource );
 526         input_resource_Release( p_mi->input.p_resource );
 527         p_mi->input.p_resource = NULL;
 528     }
 529     vlc_mutex_destroy( &p_mi->input.lock );
 530
 531     libvlc_event_manager_release( p_mi->p_event_manager );
 532     libvlc_media_release( p_mi->p_md );
 533     vlc_mutex_destroy( &p_mi->object_lock );
 534
 535     libvlc_instance_t *instance = p_mi->p_libvlc_instance;
 536     vlc_object_release( p_mi );
 537     libvlc_release(instance);
 538 }
 539
 540 /**************************************************************************
 541  * Release a Media Instance object.
 542  *
 543  * Function does the locking.
 544  **************************************************************************/
 545 void libvlc_media_player_release( libvlc_media_player_t *p_mi )
 546 {
 547     bool destroy;
 548
 549     assert( p_mi );
 550     lock(p_mi);
 551     destroy = !--p_mi->i_refcount;
 552     unlock(p_mi);
 553
 554     if( destroy )
 555         libvlc_media_player_destroy( p_mi );
 556 }
 557
 558 /**************************************************************************
 559  * Retain a Media Instance object.
 560  *
 561  * Caller must hold the lock.
 562  **************************************************************************/
 563 void libvlc_media_player_retain( libvlc_media_player_t *p_mi )
 564 {
 565     assert( p_mi );
 566
 567     lock(p_mi);
 568     p_mi->i_refcount++;
 569     unlock(p_mi);
 570 }
 571
 572 /**************************************************************************
 573  * Set the Media descriptor associated with the instance.
 574  *
 575  * Enter without lock -- function will lock the object.
 576  **************************************************************************/
 577 void libvlc_media_player_set_media(
 578                             libvlc_media_player_t *p_mi,
 579                             libvlc_media_t *p_md )
 580 {
 581     lock_input(p_mi);
 582
 583     /* FIXME I am not sure if it is a user request or on die(eof/error)
 584      * request here */
 585     release_input_thread( p_mi,
 586                           p_mi->input.p_thread &&
 587                           !p_mi->input.p_thread->b_eof &&
 588                           !p_mi->input.p_thread->b_error );
 589
 590     lock( p_mi );
 591     set_state( p_mi, libvlc_NothingSpecial, true );
 592     unlock_input( p_mi );
 593
 594     libvlc_media_release( p_mi->p_md );
 595
 596     if( !p_md )
 597     {
 598         p_mi->p_md = NULL;
 599         unlock(p_mi);
 600         return; /* It is ok to pass a NULL md */
 601     }
 602
 603     libvlc_media_retain( p_md );
 604     p_mi->p_md = p_md;
 605
 606     /* The policy here is to ignore that we were created using a different
 607      * libvlc_instance, because we don't really care */
 608     p_mi->p_libvlc_instance = p_md->p_libvlc_instance;
 609
 610     unlock(p_mi);
 611
 612     /* Send an event for the newly available media */
 613     libvlc_event_t event;
 614     event.type = libvlc_MediaPlayerMediaChanged;
 615     event.u.media_player_media_changed.new_media = p_md;
 616     libvlc_event_send( p_mi->p_event_manager, &event );
 617
 618 }
 619
 620 /**************************************************************************
 621  * Get the Media descriptor associated with the instance.
 622  **************************************************************************/
 623 libvlc_media_t *
 624 libvlc_media_player_get_media( libvlc_media_player_t *p_mi )
 625 {
 626     libvlc_media_t *p_m;
 627
 628     lock(p_mi);
 629     p_m = p_mi->p_md;
 630     if( p_m )
 631         libvlc_media_retain( p_mi->p_md );
 632     unlock(p_mi);
 633     return p_mi->p_md;
 634 }
 635
 636 /**************************************************************************
 637  * Get the event Manager.
 638  **************************************************************************/
 639 libvlc_event_manager_t *
 640 libvlc_media_player_event_manager( libvlc_media_player_t *p_mi )
 641 {
 642     return p_mi->p_event_manager;
 643 }
 644
 645 /**************************************************************************
 646  * Tell media player to start playing.
 647  **************************************************************************/
 648 int libvlc_media_player_play( libvlc_media_player_t *p_mi )
 649 {
 650     lock_input( p_mi );
 651
 652     input_thread_t *p_input_thread = p_mi->input.p_thread;
 653     if( p_input_thread )
 654     {
 655         /* A thread already exists, send it a play message */
 656         input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 657         unlock_input( p_mi );
 658         return 0;
 659     }
 660
 661     /* Ignore previous exception */
 662     lock(p_mi);
 663
 664     if( !p_mi->p_md )
 665     {
 666         unlock(p_mi);
 667         unlock_input( p_mi );
 668         libvlc_printerr( "No associated media descriptor" );
 669         return -1;
 670     }
 671
 672     if( !p_mi->input.p_resource )
 673         p_mi->input.p_resource = input_resource_New( VLC_OBJECT( p_mi ) );
 674     p_input_thread = input_Create( p_mi, p_mi->p_md->p_input_item, NULL,
 675                                    p_mi->input.p_resource );
 676     unlock(p_mi);
 677     if( !p_input_thread )
 678     {
 679         unlock_input(p_mi);
 680         libvlc_printerr( "Not enough memory" );
 681         return -1;
 682     }
 683
 684     var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 685     var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 686     var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 687
 688     if( input_Start( p_input_thread ) )
 689     {
 690         unlock_input(p_mi);
 691         var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
 692         var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
 693         var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
 694         vlc_object_release( p_input_thread );
 695         libvlc_printerr( "Input initialization failure" );
 696         return -1;
 697     }
 698     p_mi->input.p_thread = p_input_thread;
 699     unlock_input(p_mi);
 700     return 0;
 701 }
 702
 703 void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused )
 704 {
 705     input_thread_t * p_input_thread = libvlc_get_input_thread( p_mi );
 706     if( !p_input_thread )
 707         return;
 708
 709     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 710     if( state == libvlc_Playing || state == libvlc_Buffering )
 711     {
 712         if( paused )
 713         {
 714             if( libvlc_media_player_can_pause( p_mi ) )
 715                 input_Control( p_input_thread, INPUT_SET_STATE, PAUSE_S );
 716             else
 717                 libvlc_media_player_stop( p_mi );
 718         }
 719     }
 720     else
 721     {
 722         if( !paused )
 723             input_Control( p_input_thread, INPUT_SET_STATE, PLAYING_S );
 724     }
 725
 726     vlc_object_release( p_input_thread );
 727 }
 728
 729 /**************************************************************************
 730  * Toggle pause.
 731  **************************************************************************/
 732 void libvlc_media_player_pause( libvlc_media_player_t *p_mi )
 733 {
 734     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 735     bool playing = (state == libvlc_Playing || state == libvlc_Buffering);
 736
 737     libvlc_media_player_set_pause( p_mi, playing );
 738 }
 739
 740 /**************************************************************************
 741  * Tells whether the media player is currently playing.
 742  *
 743  * Enter with lock held.
 744  **************************************************************************/
 745 int libvlc_media_player_is_playing( libvlc_media_player_t *p_mi )
 746 {
 747     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 748     return (libvlc_Playing == state) || (libvlc_Buffering == state);
 749 }
 750
 751 /**************************************************************************
 752  * Stop playing.
 753  **************************************************************************/
 754 void libvlc_media_player_stop( libvlc_media_player_t *p_mi )
 755 {
 756     libvlc_state_t state = libvlc_media_player_get_state( p_mi );
 757
 758     lock_input(p_mi);
 759     release_input_thread( p_mi, true ); /* This will stop the input thread */
 760
 761     /* Force to go to stopped state, in case we were in Ended, or Error
 762      * state. */
 763     if( state != libvlc_Stopped )
 764     {
 765         set_state( p_mi, libvlc_Stopped, false );
 766
 767         /* Construct and send the event */
 768         libvlc_event_t event;
 769         event.type = libvlc_MediaPlayerStopped;
 770         libvlc_event_send( p_mi->p_event_manager, &event );
 771     }
 772
 773     if( p_mi->input.p_resource != NULL )
 774         input_resource_TerminateVout( p_mi->input.p_resource );
 775     unlock_input(p_mi);
 776 }
 777
 778
 779 void libvlc_video_set_callbacks( libvlc_media_player_t *mp,
 780     void *(*lock_cb) (void *, void **),
 781     void (*unlock_cb) (void *, void *, void *const *),
 782     void (*display_cb) (void *, void *),
 783     void *opaque )
 784 {
 785     var_SetAddress( mp, "vmem-lock", lock_cb );
 786     var_SetAddress( mp, "vmem-unlock", unlock_cb );
 787     var_SetAddress( mp, "vmem-display", display_cb );
 788     var_SetAddress( mp, "vmem-data", opaque );
 789     var_SetString( mp, "vout", "vmem" );
 790 }
 791
 792 void libvlc_video_set_format( libvlc_media_player_t *mp, const char *chroma,
 793                               unsigned width, unsigned height, unsigned pitch )
 794 {
 795     var_SetString( mp, "vmem-chroma", chroma );
 796     var_SetInteger( mp, "vmem-width", width );
 797     var_SetInteger( mp, "vmem-height", height );
 798     var_SetInteger( mp, "vmem-pitch", pitch );
 799 }
 800
 801 /**************************************************************************
 802  * set_nsobject
 803  **************************************************************************/
 804 void libvlc_media_player_set_nsobject( libvlc_media_player_t *p_mi,
 805                                         void * drawable )
 806 {
 807     assert (p_mi != NULL);
 808 #ifdef __APPLE__
 809     var_SetAddress (p_mi, "drawable-nsobject", drawable);
 810 #else
 811     (void) p_mi; (void)drawable;
 812 #endif
 813 }
 814
 815 /**************************************************************************
 816  * get_nsobject
 817  **************************************************************************/
 818 void * libvlc_media_player_get_nsobject( libvlc_media_player_t *p_mi )
 819 {
 820     assert (p_mi != NULL);
 821 #ifdef __APPLE__
 822     return var_GetAddress (p_mi, "drawable-nsobject");
 823 #else
 824     return NULL;
 825 #endif
 826 }
 827
 828 /**************************************************************************
 829  * set_agl
 830  **************************************************************************/
 831 void libvlc_media_player_set_agl( libvlc_media_player_t *p_mi,
 832                                   uint32_t drawable )
 833 {
 834 #ifdef __APPLE__
 835     var_SetInteger (p_mi, "drawable-agl", drawable);
 836 #else
 837     (void) p_mi; (void)drawable;
 838 #endif
 839 }
 840
 841 /**************************************************************************
 842  * get_agl
 843  **************************************************************************/
 844 uint32_t libvlc_media_player_get_agl( libvlc_media_player_t *p_mi )
 845 {
 846     assert (p_mi != NULL);
 847 #ifdef __APPLE__
 848     return var_GetInteger (p_mi, "drawable-agl");
 849 #else
 850     return 0;
 851 #endif
 852 }
 853
 854 /**************************************************************************
 855  * set_xwindow
 856  **************************************************************************/
 857 void libvlc_media_player_set_xwindow( libvlc_media_player_t *p_mi,
 858                                       uint32_t drawable )
 859 {
 860     assert (p_mi != NULL);
 861
 862     var_SetString (p_mi, "vout", drawable ? "xid" : "any");
 863     var_SetString (p_mi, "window", drawable ? "embed-xid,any" : "any");
 864     var_SetInteger (p_mi, "drawable-xid", drawable);
 865 }
 866
 867 /**************************************************************************
 868  * get_xwindow
 869  **************************************************************************/
 870 uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t *p_mi )
 871 {
 872     return var_GetInteger (p_mi, "drawable-xid");
 873 }
 874
 875 /**************************************************************************
 876  * set_hwnd
 877  **************************************************************************/
 878 void libvlc_media_player_set_hwnd( libvlc_media_player_t *p_mi,
 879                                    void *drawable )
 880 {
 881     assert (p_mi != NULL);
 882 #ifdef WIN32
 883     var_SetString (p_mi, "window",
 884                    (drawable != NULL) ? "embed-hwnd,any" : "");
 885     var_SetAddress (p_mi, "drawable-hwnd", drawable);
 886 #else
 887     (void) p_mi; (void) drawable;
 888 #endif
 889 }
 890
 891 /**************************************************************************
 892  * get_hwnd
 893  **************************************************************************/
 894 void *libvlc_media_player_get_hwnd( libvlc_media_player_t *p_mi )
 895 {
 896     assert (p_mi != NULL);
 897 #ifdef WIN32
 898     return var_GetAddress (p_mi, "drawable-hwnd");
 899 #else
 900     return NULL;
 901 #endif
 902 }
 903
 904 /**************************************************************************
 905  * Getters for stream information
 906  **************************************************************************/
 907 libvlc_time_t libvlc_media_player_get_length(
 908                              libvlc_media_player_t *p_mi )
 909 {
 910     input_thread_t *p_input_thread;
 911     libvlc_time_t i_time;
 912
 913     p_input_thread = libvlc_get_input_thread ( p_mi );
 914     if( !p_input_thread )
 915         return -1;
 916
 917     i_time = from_mtime(var_GetTime( p_input_thread, "length" ));
 918     vlc_object_release( p_input_thread );
 919
 920     return i_time;
 921 }
 922
 923 libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t *p_mi )
 924 {
 925     input_thread_t *p_input_thread;
 926     libvlc_time_t i_time;
 927
 928     p_input_thread = libvlc_get_input_thread ( p_mi );
 929     if( !p_input_thread )
 930         return -1;
 931
 932     i_time = from_mtime(var_GetTime( p_input_thread , "time" ));
 933     vlc_object_release( p_input_thread );
 934     return i_time;
 935 }
 936
 937 void libvlc_media_player_set_time( libvlc_media_player_t *p_mi,
 938                                    libvlc_time_t i_time )
 939 {
 940     input_thread_t *p_input_thread;
 941
 942     p_input_thread = libvlc_get_input_thread ( p_mi );
 943     if( !p_input_thread )
 944         return;
 945
 946     var_SetTime( p_input_thread, "time", to_mtime(i_time) );
 947     vlc_object_release( p_input_thread );
 948 }
 949
 950 void libvlc_media_player_set_position( libvlc_media_player_t *p_mi,
 951                                        float position )
 952 {
 953     input_thread_t *p_input_thread;
 954
 955     p_input_thread = libvlc_get_input_thread ( p_mi );
 956     if( !p_input_thread )
 957         return;
 958
 959     var_SetFloat( p_input_thread, "position", position );
 960     vlc_object_release( p_input_thread );
 961 }
 962
 963 float libvlc_media_player_get_position( libvlc_media_player_t *p_mi )
 964 {
 965     input_thread_t *p_input_thread;
 966     float f_position;
 967
 968     p_input_thread = libvlc_get_input_thread ( p_mi );
 969     if( !p_input_thread )
 970         return -1.0;
 971
 972     f_position = var_GetFloat( p_input_thread, "position" );
 973     vlc_object_release( p_input_thread );
 974
 975     return f_position;
 976 }
 977
 978 void libvlc_media_player_set_chapter( libvlc_media_player_t *p_mi,
 979                                       int chapter )
 980 {
 981     input_thread_t *p_input_thread;
 982
 983     p_input_thread = libvlc_get_input_thread ( p_mi );
 984     if( !p_input_thread )
 985         return;
 986
 987     var_SetInteger( p_input_thread, "chapter", chapter );
 988     vlc_object_release( p_input_thread );
 989 }
 990
 991 int libvlc_media_player_get_chapter( libvlc_media_player_t *p_mi )
 992 {
 993     input_thread_t *p_input_thread;
 994     int i_chapter;
 995
 996     p_input_thread = libvlc_get_input_thread ( p_mi );
 997     if( !p_input_thread )
 998         return -1;
 999
1000     i_chapter = var_GetInteger( p_input_thread, "chapter" );
1001     vlc_object_release( p_input_thread );
1002
1003     return i_chapter;
1004 }
1005
1006 int libvlc_media_player_get_chapter_count( libvlc_media_player_t *p_mi )
1007 {
1008     input_thread_t *p_input_thread;
1009     vlc_value_t val;
1010
1011     p_input_thread = libvlc_get_input_thread ( p_mi );
1012     if( !p_input_thread )
1013         return -1;
1014
1015     var_Change( p_input_thread, "chapter", VLC_VAR_CHOICESCOUNT, &val, NULL );
1016     vlc_object_release( p_input_thread );
1017
1018     return val.i_int;
1019 }
1020
1021 int libvlc_media_player_get_chapter_count_for_title(
1022                                  libvlc_media_player_t *p_mi,
1023                                  int i_title )
1024 {
1025     input_thread_t *p_input_thread;
1026     vlc_value_t val;
1027
1028     p_input_thread = libvlc_get_input_thread ( p_mi );
1029     if( !p_input_thread )
1030         return -1;
1031
1032     char *psz_name;
1033     if( asprintf( &psz_name,  "title %2i", i_title ) == -1 )
1034     {
1035         vlc_object_release( p_input_thread );
1036         return -1;
1037     }
1038     var_Change( p_input_thread, psz_name, VLC_VAR_CHOICESCOUNT, &val, NULL );
1039     vlc_object_release( p_input_thread );
1040     free( psz_name );
1041
1042     return val.i_int;
1043 }
1044
1045 void libvlc_media_player_set_title( libvlc_media_player_t *p_mi,
1046                                     int i_title )
1047 {
1048     input_thread_t *p_input_thread;
1049
1050     p_input_thread = libvlc_get_input_thread ( p_mi );
1051     if( !p_input_thread )
1052         return;
1053
1054     var_SetInteger( p_input_thread, "title", i_title );
1055     vlc_object_release( p_input_thread );
1056
1057     //send event
1058     libvlc_event_t event;
1059     event.type = libvlc_MediaPlayerTitleChanged;
1060     event.u.media_player_title_changed.new_title = i_title;
1061     libvlc_event_send( p_mi->p_event_manager, &event );
1062 }
1063
1064 int libvlc_media_player_get_title( libvlc_media_player_t *p_mi )
1065 {
1066     input_thread_t *p_input_thread;
1067     int i_title;
1068
1069     p_input_thread = libvlc_get_input_thread ( p_mi );
1070     if( !p_input_thread )
1071         return -1;
1072
1073     i_title = var_GetInteger( p_input_thread, "title" );
1074     vlc_object_release( p_input_thread );
1075
1076     return i_title;
1077 }
1078
1079 int libvlc_media_player_get_title_count( libvlc_media_player_t *p_mi )
1080 {
1081     input_thread_t *p_input_thread;
1082     vlc_value_t val;
1083
1084     p_input_thread = libvlc_get_input_thread ( p_mi );
1085     if( !p_input_thread )
1086         return -1;
1087
1088     var_Change( p_input_thread, "title", VLC_VAR_CHOICESCOUNT, &val, NULL );
1089     vlc_object_release( p_input_thread );
1090
1091     return val.i_int;
1092 }
1093
1094 void libvlc_media_player_next_chapter( libvlc_media_player_t *p_mi )
1095 {
1096     input_thread_t *p_input_thread;
1097
1098     p_input_thread = libvlc_get_input_thread ( p_mi );
1099     if( !p_input_thread )
1100         return;
1101
1102     int i_type = var_Type( p_input_thread, "next-chapter" );
1103     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1104                             "next-chapter":"next-title", true );
1105
1106     vlc_object_release( p_input_thread );
1107 }
1108
1109 void libvlc_media_player_previous_chapter( libvlc_media_player_t *p_mi )
1110 {
1111     input_thread_t *p_input_thread;
1112
1113     p_input_thread = libvlc_get_input_thread ( p_mi );
1114     if( !p_input_thread )
1115         return;
1116
1117     int i_type = var_Type( p_input_thread, "next-chapter" );
1118     var_SetBool( p_input_thread, (i_type & VLC_VAR_TYPE) != 0 ?
1119                             "prev-chapter":"prev-title", true );
1120
1121     vlc_object_release( p_input_thread );
1122 }
1123
1124 float libvlc_media_player_get_fps( libvlc_media_player_t *p_mi )
1125 {
1126     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1127     double f_fps = 0.0;
1128
1129     if( p_input_thread )
1130     {
1131         if( input_Control( p_input_thread, INPUT_GET_VIDEO_FPS, &f_fps ) )
1132             f_fps = 0.0;
1133         vlc_object_release( p_input_thread );
1134     }
1135     return f_fps;
1136 }
1137
1138 int libvlc_media_player_will_play( libvlc_media_player_t *p_mi )
1139 {
1140     bool b_will_play;
1141     input_thread_t *p_input_thread =
1142                             libvlc_get_input_thread ( p_mi );
1143     if ( !p_input_thread )
1144         return false;
1145
1146     b_will_play = !p_input_thread->b_die && !p_input_thread->b_dead;
1147     vlc_object_release( p_input_thread );
1148
1149     return b_will_play;
1150 }
1151
1152 int libvlc_media_player_set_rate( libvlc_media_player_t *p_mi, float rate )
1153 {
1154     if (rate < 0.)
1155     {
1156         libvlc_printerr ("Playing backward not supported");
1157         return -1;
1158     }
1159
1160     var_SetFloat (p_mi, "rate", rate);
1161
1162     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1163     if( !p_input_thread )
1164         return 0;
1165     var_SetFloat( p_input_thread, "rate", rate );
1166     vlc_object_release( p_input_thread );
1167     return 0;
1168 }
1169
1170 float libvlc_media_player_get_rate( libvlc_media_player_t *p_mi )
1171 {
1172     return var_GetFloat (p_mi, "rate");
1173 }
1174
1175 libvlc_state_t libvlc_media_player_get_state( libvlc_media_player_t *p_mi )
1176 {
1177     lock(p_mi);
1178     libvlc_state_t state = p_mi->state;
1179     unlock(p_mi);
1180     return state;
1181 }
1182
1183 int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi )
1184 {
1185     input_thread_t *p_input_thread;
1186     bool b_seekable;
1187
1188     p_input_thread = libvlc_get_input_thread ( p_mi );
1189     if ( !p_input_thread )
1190         return false;
1191     b_seekable = var_GetBool( p_input_thread, "can-seek" );
1192     vlc_object_release( p_input_thread );
1193
1194     return b_seekable;
1195 }
1196
1197 /* internal function, used by audio, video */
1198 libvlc_track_description_t *
1199         libvlc_get_track_description( libvlc_media_player_t *p_mi,
1200                                       const char *psz_variable )
1201 {
1202     input_thread_t *p_input = libvlc_get_input_thread( p_mi );
1203     libvlc_track_description_t *p_track_description = NULL,
1204                                *p_actual, *p_previous;
1205
1206     if( !p_input )
1207         return NULL;
1208
1209     vlc_value_t val_list, text_list;
1210     var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
1211
1212     /* no tracks */
1213     if( val_list.p_list->i_count <= 0 )
1214         goto end;
1215
1216     p_track_description = ( libvlc_track_description_t * )
1217         malloc( sizeof( libvlc_track_description_t ) );
1218     if ( !p_track_description )
1219     {
1220         libvlc_printerr( "Not enough memory" );
1221         goto end;
1222     }
1223     p_actual = p_track_description;
1224     p_previous = NULL;
1225     for( int i = 0; i < val_list.p_list->i_count; i++ )
1226     {
1227         if( !p_actual )
1228         {
1229             p_actual = ( libvlc_track_description_t * )
1230                 malloc( sizeof( libvlc_track_description_t ) );
1231             if ( !p_actual )
1232             {
1233                 libvlc_track_description_release( p_track_description );
1234                 libvlc_printerr( "Not enough memory" );
1235                 goto end;
1236             }
1237         }
1238         p_actual->i_id = val_list.p_list->p_values[i].i_int;
1239         p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
1240         p_actual->p_next = NULL;
1241         if( p_previous )
1242             p_previous->p_next = p_actual;
1243         p_previous = p_actual;
1244         p_actual =  NULL;
1245     }
1246
1247 end:
1248     var_FreeList( &val_list, &text_list );
1249     vlc_object_release( p_input );
1250
1251     return p_track_description;
1252 }
1253
1254 void libvlc_track_description_release( libvlc_track_description_t *p_td )
1255 {
1256     libvlc_track_description_t *p_actual, *p_before;
1257     p_actual = p_td;
1258
1259     while ( p_actual )
1260     {
1261         free( p_actual->psz_name );
1262         p_before = p_actual;
1263         p_actual = p_before->p_next;
1264         free( p_before );
1265     }
1266 }
1267
1268 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi )
1269 {
1270     input_thread_t *p_input_thread;
1271     bool b_can_pause;
1272
1273     p_input_thread = libvlc_get_input_thread ( p_mi );
1274     if ( !p_input_thread )
1275         return false;
1276     b_can_pause = var_GetBool( p_input_thread, "can-pause" );
1277     vlc_object_release( p_input_thread );
1278
1279     return b_can_pause;
1280 }
1281
1282 void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
1283 {
1284     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
1285     if( p_input_thread != NULL )
1286     {
1287         var_TriggerCallback( p_input_thread, "frame-next" );
1288         vlc_object_release( p_input_thread );
1289     }
1290 }