git.sesse.net Git - vlc/blob - projects/macosx/framework/Sources/VLCMediaPlayer.m

   1 /*****************************************************************************
   2  * VLCMediaPlayer.m: VLCKit.framework VLCMediaPlayer implementation
   3  *****************************************************************************
   4  * Copyright (C) 2007-2009 Pierre d'Herbemont
   5  * Copyright (C) 2007-2009 the VideoLAN team
   6  * Partial Copyright (C) 2009 Felix Paul Kühne
   7  * $Id$
   8  *
   9  * Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
  10  *          Faustion Osuna <enrique.osuna # gmail.com>
  11  *          Felix Paul Kühne <fkuehne # videolan.org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  26  *****************************************************************************/
  27
  28 #import "VLCLibrary.h"
  29 #import "VLCMediaPlayer.h"
  30 #import "VLCEventManager.h"
  31 #import "VLCLibVLCBridging.h"
  32 #import "VLCVideoView.h"
  33 #ifdef HAVE_CONFIG_H
  34 # include "config.h"
  35 #endif
  36
  37 /* prevent system sleep */
  38 #import <CoreServices/CoreServices.h>
  39 /* FIXME: Ugly hack! */
  40 #ifdef __x86_64__
  41 #import <CoreServices/../Frameworks/OSServices.framework/Headers/Power.h>
  42 #endif
  43
  44 #include <vlc/vlc.h>
  45
  46 /* Notification Messages */
  47 NSString * VLCMediaPlayerTimeChanged    = @"VLCMediaPlayerTimeChanged";
  48 NSString * VLCMediaPlayerStateChanged   = @"VLCMediaPlayerStateChanged";
  49
  50 NSString * VLCMediaPlayerStateToString(VLCMediaPlayerState state)
  51 {
  52     static NSString * stateToStrings[] = {
  53         [VLCMediaPlayerStateStopped]      = @"VLCMediaPlayerStateStopped",
  54         [VLCMediaPlayerStateOpening]      = @"VLCMediaPlayerStateOpening",
  55         [VLCMediaPlayerStateBuffering]    = @"VLCMediaPlayerStateBuffering",
  56         [VLCMediaPlayerStateEnded]        = @"VLCMediaPlayerStateEnded",
  57         [VLCMediaPlayerStateError]        = @"VLCMediaPlayerStateError",
  58         [VLCMediaPlayerStatePlaying]      = @"VLCMediaPlayerStatePlaying",
  59         [VLCMediaPlayerStatePaused]       = @"VLCMediaPlayerStatePaused"
  60     };
  61     return stateToStrings[state];
  62 }
  63
  64 /* libvlc event callback */
  65 static void HandleMediaInstanceVolumeChanged(const libvlc_event_t * event, void * self)
  66 {
  67     [[VLCEventManager sharedManager] callOnMainThreadDelegateOfObject:self
  68                                                    withDelegateMethod:@selector(mediaPlayerVolumeChanged:)
  69                                                  withNotificationName:VLCMediaPlayerVolumeChanged];
  70 }
  71
  72 static void HandleMediaTimeChanged(const libvlc_event_t * event, void * self)
  73 {
  74     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
  75     [[VLCEventManager sharedManager] callOnMainThreadObject:self
  76                                                  withMethod:@selector(mediaPlayerTimeChanged:)
  77                                        withArgumentAsObject:[NSNumber numberWithLongLong:event->u.media_player_time_changed.new_time]];
  78
  79     [[VLCEventManager sharedManager] callOnMainThreadDelegateOfObject:self
  80                                                    withDelegateMethod:@selector(mediaPlayerTimeChanged:)
  81                                                  withNotificationName:VLCMediaPlayerTimeChanged];
  82     [pool release];
  83 }
  84
  85 static void HandleMediaPositionChanged(const libvlc_event_t * event, void * self)
  86 {
  87     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
  88
  89     [[VLCEventManager sharedManager] callOnMainThreadObject:self
  90                                                  withMethod:@selector(mediaPlayerPositionChanged:)
  91                                        withArgumentAsObject:[NSNumber numberWithFloat:event->u.media_player_position_changed.new_position]];
  92     [pool release];
  93 }
  94
  95 static void HandleMediaInstanceStateChanged(const libvlc_event_t * event, void * self)
  96 {
  97     VLCMediaPlayerState newState;
  98
  99     if( event->type == libvlc_MediaPlayerPlaying )
 100         newState = VLCMediaPlayerStatePlaying;
 101     else if( event->type == libvlc_MediaPlayerPaused )
 102         newState = VLCMediaPlayerStatePaused;
 103     else if( event->type == libvlc_MediaPlayerEndReached )
 104         newState = VLCMediaPlayerStateStopped;
 105     else if( event->type == libvlc_MediaPlayerEncounteredError )
 106         newState = VLCMediaPlayerStateError;
 107     else
 108     {
 109         NSLog(@"%s: Unknown event", __FUNCTION__);
 110         return;
 111     }
 112
 113     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 114
 115     [[VLCEventManager sharedManager] callOnMainThreadObject:self
 116                                                  withMethod:@selector(mediaPlayerStateChanged:)
 117                                        withArgumentAsObject:[NSNumber numberWithInt:newState]];
 118
 119     [[VLCEventManager sharedManager] callOnMainThreadDelegateOfObject:self
 120                                                    withDelegateMethod:@selector(mediaPlayerStateChanged:)
 121                                                  withNotificationName:VLCMediaPlayerStateChanged];
 122
 123     [pool release];
 124
 125 }
 126
 127 static void HandleMediaPlayerMediaChanged(const libvlc_event_t * event, void * self)
 128 {
 129     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 130
 131     [[VLCEventManager sharedManager] callOnMainThreadObject:self
 132                                                  withMethod:@selector(mediaPlayerMediaChanged:)
 133                                        withArgumentAsObject:[VLCMedia mediaWithLibVLCMediaDescriptor:event->u.media_player_media_changed.new_media]];
 134
 135     [pool release];
 136
 137 }
 138
 139
 140 // TODO: Documentation
 141 @interface VLCMediaPlayer (Private)
 142 - (id)initWithDrawable:(id)aDrawable;
 143
 144 - (void)registerObservers;
 145 - (void)unregisterObservers;
 146 - (void)mediaPlayerTimeChanged:(NSNumber *)newTime;
 147 - (void)mediaPlayerPositionChanged:(NSNumber *)newTime;
 148 - (void)mediaPlayerStateChanged:(NSNumber *)newState;
 149 - (void)mediaPlayerMediaChanged:(VLCMedia *)media;
 150 @end
 151
 152 @implementation VLCMediaPlayer
 153
 154 /* Bindings */
 155 + (NSSet *)keyPathsForValuesAffectingValueForKey:(NSString *)key
 156 {
 157     static NSDictionary * dict = nil;
 158     NSSet * superKeyPaths;
 159     if( !dict )
 160     {
 161         dict = [[NSDictionary dictionaryWithObjectsAndKeys:
 162             [NSSet setWithObject:@"state"], @"playing",
 163             [NSSet setWithObjects:@"state", @"media", nil], @"seekable",
 164             [NSSet setWithObjects:@"state", @"media", nil], @"canPause",
 165             [NSSet setWithObjects:@"state", @"media", nil], @"description",
 166             nil] retain];
 167     }
 168     if( (superKeyPaths = [super keyPathsForValuesAffectingValueForKey: key]) )
 169     {
 170         NSMutableSet * ret = [NSMutableSet setWithSet:[dict objectForKey: key]];
 171         [ret unionSet:superKeyPaths];
 172         return ret;
 173     }
 174     return [dict objectForKey: key];
 175 }
 176
 177 /* Contructor */
 178 - (id)init
 179 {
 180     return [self initWithDrawable:nil];
 181 }
 182
 183 - (id)initWithVideoView:(VLCVideoView *)aVideoView
 184 {
 185     return [self initWithDrawable: aVideoView];
 186 }
 187
 188 - (id)initWithVideoLayer:(VLCVideoLayer *)aVideoLayer
 189 {
 190     return [self initWithDrawable: aVideoLayer];
 191 }
 192
 193 - (void)release
 194 {
 195     @synchronized(self)
 196     {
 197         if([self retainCount] <= 1)
 198         {
 199             /* We must make sure we won't receive new event after an upcoming dealloc
 200              * We also may receive a -retain in some event callback that may occcur
 201              * Before libvlc_event_detach. So this can't happen in dealloc */
 202             [self unregisterObservers];
 203         }
 204         [super release];
 205     }
 206 }
 207
 208 - (void)dealloc
 209 {
 210     NSAssert(libvlc_media_player_get_state(instance) == libvlc_Stopped, @"You released the media player before ensuring that it is stopped");
 211
 212     // Always get rid of the delegate first so we can stop sending messages to it
 213     // TODO: Should we tell the delegate that we're shutting down?
 214     delegate = nil;
 215
 216     // Clear our drawable as we are going to release it, we don't
 217     // want the core to use it from this point. This won't happen as
 218     // the media player must be stopped.
 219     libvlc_media_player_set_nsobject(instance, nil);
 220
 221     libvlc_media_player_release(instance);
 222
 223     // Get rid of everything else
 224     [media release];
 225     [cachedTime release];
 226     [cachedRemainingTime release];
 227     [drawable release];
 228
 229     [super dealloc];
 230 }
 231
 232 - (void)setDelegate:(id)value
 233 {
 234     delegate = value;
 235 }
 236
 237 - (id)delegate
 238 {
 239     return delegate;
 240 }
 241
 242 - (void)setVideoView:(VLCVideoView *)aVideoView
 243 {
 244     [self setDrawable: aVideoView];
 245 }
 246
 247 - (void)setVideoLayer:(VLCVideoLayer *)aVideoLayer
 248 {
 249     [self setDrawable: aVideoLayer];
 250 }
 251
 252 - (void)setDrawable:(id)aDrawable
 253 {
 254     // Make sure that this instance has been associated with the drawing canvas.
 255     libvlc_media_player_set_nsobject(instance, aDrawable);
 256 }
 257
 258 - (id)drawable
 259 {
 260     return libvlc_media_player_get_nsobject(instance);
 261 }
 262
 263 - (VLCAudio *)audio
 264 {
 265     return [[VLCLibrary sharedLibrary] audio];
 266 }
 267
 268 #pragma mark -
 269 #pragma mark Subtitles
 270
 271 - (void)setCurrentVideoSubTitleIndex:(NSUInteger)index
 272 {
 273     libvlc_video_set_spu( instance, (int)index );
 274 }
 275
 276 - (NSUInteger)currentVideoSubTitleIndex
 277 {
 278     NSInteger count = libvlc_video_get_spu_count(instance);
 279
 280     if (count <= 0)
 281         return NSNotFound;
 282
 283         return libvlc_video_get_spu(instance);
 284 }
 285
 286 - (BOOL)openVideoSubTitlesFromFile:(NSString *)path
 287 {
 288     return libvlc_video_set_subtitle_file(instance, [path UTF8String]);
 289 }
 290
 291 - (NSArray *)videoSubTitles
 292 {
 293     libvlc_track_description_t *currentTrack = libvlc_video_get_spu_description(instance);
 294
 295     NSMutableArray *tempArray = [NSMutableArray array];
 296     while (currentTrack) {
 297         [tempArray addObject:[NSString stringWithUTF8String:currentTrack->psz_name]];
 298         currentTrack = currentTrack->p_next;
 299     }
 300     libvlc_track_description_release(currentTrack);
 301     return [NSArray arrayWithArray: tempArray];
 302 }
 303
 304
 305 #pragma mark -
 306 #pragma mark Video Crop geometry
 307
 308 - (void)setVideoCropGeometry:(char *)value
 309 {
 310     libvlc_video_set_crop_geometry( instance, value );
 311 }
 312
 313 - (char *)videoCropGeometry
 314 {
 315     char * result = libvlc_video_get_crop_geometry( instance );
 316     return result;
 317 }
 318
 319 - (void)setVideoAspectRatio:(char *)value
 320 {
 321     libvlc_video_set_aspect_ratio( instance, value );
 322 }
 323
 324 - (char *)videoAspectRatio
 325 {
 326     char * result = libvlc_video_get_aspect_ratio( instance );
 327     return result;
 328 }
 329
 330 - (void)saveVideoSnapshotAt: (NSString *)path withWidth:(NSUInteger)width andHeight:(NSUInteger)height
 331 {
 332         libvlc_exception_t ex;
 333     libvlc_exception_init( &ex );
 334     libvlc_video_take_snapshot( instance, [path UTF8String], width, height, &ex );
 335         catch_exception( &ex );
 336 }
 337
 338 - (void)setDeinterlaceFilter: (NSString *)name
 339 {
 340     libvlc_video_set_deinterlace( instance, [name UTF8String] );
 341 }
 342
 343 - (void)setRate:(float)value
 344 {
 345     libvlc_media_player_set_rate(instance, value);
 346 }
 347
 348 - (float)rate
 349 {
 350     return libvlc_media_player_get_rate(instance);
 351 }
 352
 353 - (NSSize)videoSize
 354 {
 355     NSSize result = NSMakeSize(libvlc_video_get_height((libvlc_media_player_t *)instance),
 356                                libvlc_video_get_width((libvlc_media_player_t *)instance));
 357     return result;
 358 }
 359
 360 - (BOOL)hasVideoOut
 361 {
 362     return libvlc_media_player_has_vout(instance);
 363 }
 364
 365 - (float)framesPerSecond
 366 {
 367     return libvlc_media_player_get_fps(instance);
 368 }
 369
 370 - (void)setTime:(VLCTime *)value
 371 {
 372     // Time is managed in seconds, while duration is managed in microseconds
 373     // TODO: Redo VLCTime to provide value numberAsMilliseconds, numberAsMicroseconds, numberAsSeconds, numberAsMinutes, numberAsHours
 374     libvlc_media_player_set_time(instance, value ? [[value numberValue] longLongValue] : 0);
 375 }
 376
 377 - (VLCTime *)time
 378 {
 379     return cachedTime;
 380 }
 381
 382 - (VLCTime *)remainingTime
 383 {
 384     return cachedRemainingTime;
 385 }
 386
 387 - (NSUInteger)fps
 388 {
 389     return libvlc_media_player_get_fps(instance);
 390 }
 391
 392 #pragma mark -
 393 #pragma mark Chapters
 394 - (void)setCurrentChapterIndex:(NSUInteger)value;
 395 {
 396     libvlc_media_player_set_chapter(instance, value);
 397 }
 398
 399 - (NSUInteger)currentChapterIndex
 400 {
 401     NSInteger count = libvlc_media_player_get_chapter_count(instance);
 402     if (count <= 0)
 403         return NSNotFound;
 404     NSUInteger result = libvlc_media_player_get_chapter(instance);
 405     return result;
 406 }
 407
 408 - (void)nextChapter
 409 {
 410     libvlc_media_player_next_chapter(instance);
 411 }
 412
 413 - (void)previousChapter
 414 {
 415     libvlc_media_player_previous_chapter(instance);
 416 }
 417
 418 - (NSArray *)chaptersForTitleIndex:(NSUInteger)title
 419 {
 420     NSInteger count = libvlc_media_player_get_chapter_count(instance);
 421     if (count <= 0)
 422         return [NSArray array];
 423
 424     libvlc_track_description_t *tracks = libvlc_video_get_chapter_description(instance, title);
 425     NSMutableArray *tempArray = [NSMutableArray array];
 426     NSInteger i;
 427     for (i = 0; i < count ; i++)
 428     {
 429         [tempArray addObject:[NSString stringWithUTF8String:tracks->psz_name]];
 430         tracks = tracks->p_next;
 431     }
 432     libvlc_track_description_release(tracks);
 433     return [NSArray arrayWithArray:tempArray];
 434 }
 435
 436 #pragma mark -
 437 #pragma mark Titles
 438
 439 - (void)setCurrentTitleIndex:(NSUInteger)value
 440 {
 441     libvlc_media_player_set_title(instance, value);
 442 }
 443
 444 - (NSUInteger)currentTitleIndex
 445 {
 446     NSInteger count = libvlc_media_player_get_title_count(instance);
 447     if (count <= 0)
 448         return NSNotFound;
 449
 450     return libvlc_media_player_get_title(instance);
 451 }
 452
 453 - (NSUInteger)countOfTitles
 454 {
 455     NSUInteger result = libvlc_media_player_get_title_count(instance);
 456     return result;
 457 }
 458
 459 - (NSArray *)titles
 460 {
 461     libvlc_track_description_t *tracks = libvlc_video_get_title_description(instance);
 462     NSMutableArray *tempArray = [NSMutableArray array];
 463     NSInteger i;
 464     for (i = 0; i < [self countOfTitles] ; i++)
 465     {
 466         [tempArray addObject:[NSString stringWithUTF8String: tracks->psz_name]];
 467         tracks = tracks->p_next;
 468     }
 469     libvlc_track_description_release(tracks);
 470     return [NSArray arrayWithArray: tempArray];
 471 }
 472
 473 #pragma mark -
 474 #pragma mark Audio tracks
 475 - (void)setCurrentAudioTrackIndex:(NSUInteger)value
 476 {
 477     libvlc_audio_set_track( instance, (int)value);
 478 }
 479
 480 - (NSUInteger)currentAudioTrackIndex
 481 {
 482     NSInteger count = libvlc_audio_get_track_count(instance);
 483     if (count <= 0)
 484         return NSNotFound;
 485
 486     NSUInteger result = libvlc_audio_get_track(instance);
 487     return result;
 488 }
 489
 490 - (NSArray *)audioTracks
 491 {
 492     NSInteger count = libvlc_audio_get_track_count(instance);
 493     if (count <= 0)
 494         return [NSArray array];
 495
 496     libvlc_track_description_t *tracks = libvlc_audio_get_track_description(instance);
 497     NSMutableArray *tempArray = [NSMutableArray array];
 498     NSUInteger i;
 499     for (i = 0; i < count ; i++)
 500     {
 501         [tempArray addObject:[NSString stringWithUTF8String: tracks->psz_name]];
 502         tracks = tracks->p_next;
 503     }
 504     libvlc_track_description_release(tracks);
 505
 506     return [NSArray arrayWithArray: tempArray];
 507 }
 508
 509 - (void)setAudioChannel:(NSInteger)value
 510 {
 511     libvlc_audio_set_channel(instance, value);
 512 }
 513
 514 - (NSInteger)audioChannel
 515 {
 516     return libvlc_audio_get_channel(instance);
 517 }
 518
 519 - (void)setMedia:(VLCMedia *)value
 520 {
 521     if (media != value)
 522     {
 523         if (media && [media compare:value] == NSOrderedSame)
 524             return;
 525
 526         [media release];
 527         media = [value retain];
 528
 529         libvlc_media_player_set_media(instance, [media libVLCMediaDescriptor]);
 530     }
 531 }
 532
 533 - (VLCMedia *)media
 534 {
 535     return media;
 536 }
 537
 538 - (BOOL)play
 539 {
 540     libvlc_media_player_play(instance);
 541     return YES;
 542 }
 543
 544 - (void)pause
 545 {
 546     if( [NSThread isMainThread] )
 547     {
 548         /* Hack because we create a dead lock here, when the vout is stopped
 549          * and tries to recontact us on the main thread */
 550         /* FIXME: to do this properly we need to do some locking. We may want
 551          * to move that to libvlc */
 552         [self performSelectorInBackground:@selector(pause) withObject:nil];
 553         return;
 554     }
 555
 556     // Pause the stream
 557     libvlc_media_player_pause(instance);
 558 }
 559
 560 - (void)stop
 561 {
 562     libvlc_media_player_stop(instance);
 563 }
 564
 565 - (void)gotoNextFrame
 566 {
 567     libvlc_media_player_next_frame(instance);
 568
 569 }
 570
 571 - (void)fastForward
 572 {
 573     [self fastForwardAtRate: 2.0];
 574 }
 575
 576 - (void)fastForwardAtRate:(float)rate
 577 {
 578     [self setRate:rate];
 579 }
 580
 581 - (void)rewind
 582 {
 583     [self rewindAtRate: 2.0];
 584 }
 585
 586 - (void)rewindAtRate:(float)rate
 587 {
 588     [self setRate: -rate];
 589 }
 590
 591 - (void)jumpBackward:(NSInteger)interval
 592 {
 593     if( [self isSeekable] )
 594     {
 595         interval = interval * 1000;
 596         [self setTime: [VLCTime timeWithInt: ([[self time] intValue] - interval)]];
 597     }
 598 }
 599
 600 - (void)jumpForward:(NSInteger)interval
 601 {
 602     if( [self isSeekable] )
 603     {
 604         interval = interval * 1000;
 605         [self setTime: [VLCTime timeWithInt: ([[self time] intValue] + interval)]];
 606     }
 607 }
 608
 609 - (void)extraShortJumpBackward
 610 {
 611     [self jumpBackward:3];
 612 }
 613
 614 - (void)extraShortJumpForward
 615 {
 616     [self jumpForward:3];
 617 }
 618
 619 - (void)shortJumpBackward
 620 {
 621     [self jumpBackward:10];
 622 }
 623
 624 - (void)shortJumpForward
 625 {
 626     [self jumpForward:10];
 627 }
 628
 629 - (void)mediumJumpBackward
 630 {
 631     [self jumpBackward:60];
 632 }
 633
 634 - (void)mediumJumpForward
 635 {
 636     [self jumpForward:60];
 637 }
 638
 639 - (void)longJumpBackward
 640 {
 641     [self jumpBackward:300];
 642 }
 643
 644 - (void)longJumpForward
 645 {
 646     [self jumpForward:300];
 647 }
 648
 649 + (NSSet *)keyPathsForValuesAffectingIsPlaying
 650 {
 651     return [NSSet setWithObjects:@"state", nil];
 652 }
 653
 654 - (BOOL)isPlaying
 655 {
 656     VLCMediaPlayerState state = [self state];
 657     return ((state == VLCMediaPlayerStateOpening) || (state == VLCMediaPlayerStateBuffering) ||
 658             (state == VLCMediaPlayerStatePlaying));
 659 }
 660
 661 - (BOOL)willPlay
 662 {
 663     return libvlc_media_player_will_play(instance);
 664 }
 665
 666 static const VLCMediaPlayerState libvlc_to_local_state[] =
 667 {
 668     [libvlc_Stopped]    = VLCMediaPlayerStateStopped,
 669     [libvlc_Opening]    = VLCMediaPlayerStateOpening,
 670     [libvlc_Buffering]  = VLCMediaPlayerStateBuffering,
 671     [libvlc_Playing]    = VLCMediaPlayerStatePlaying,
 672     [libvlc_Paused]     = VLCMediaPlayerStatePaused,
 673     [libvlc_Ended]      = VLCMediaPlayerStateEnded,
 674     [libvlc_Error]      = VLCMediaPlayerStateError
 675 };
 676
 677 - (VLCMediaPlayerState)state
 678 {
 679     return cachedState;
 680 }
 681
 682 - (float)position
 683 {
 684     return position;
 685 }
 686
 687 - (void)setPosition:(float)newPosition
 688 {
 689     libvlc_media_player_set_position(instance, newPosition);
 690 }
 691
 692 - (BOOL)isSeekable
 693 {
 694     return libvlc_media_player_is_seekable(instance);
 695 }
 696
 697 - (BOOL)canPause
 698 {
 699     return libvlc_media_player_can_pause(instance);
 700 }
 701
 702 - (void *)libVLCMediaPlayer
 703 {
 704     return instance;
 705 }
 706 @end
 707
 708 @implementation VLCMediaPlayer (Private)
 709 - (id)initWithDrawable:(id)aDrawable
 710 {
 711     if (self = [super init])
 712     {
 713         delegate = nil;
 714         media = nil;
 715         cachedTime = [[VLCTime nullTime] retain];
 716         cachedRemainingTime = [[VLCTime nullTime] retain];
 717         position = 0.0f;
 718         cachedState = VLCMediaPlayerStateStopped;
 719
 720         // Create a media instance, it doesn't matter what library we start off with
 721         // it will change depending on the media descriptor provided to the media
 722         // instance
 723         libvlc_exception_t ex;
 724         libvlc_exception_init( &ex );
 725         instance = libvlc_media_player_new([VLCLibrary sharedInstance]);
 726         catch_exception( &ex );
 727
 728         [self registerObservers];
 729
 730         [self setDrawable:aDrawable];
 731     }
 732     return self;
 733 }
 734
 735 - (void)registerObservers
 736 {
 737     // Attach event observers into the media instance
 738     libvlc_event_manager_t * p_em = libvlc_media_player_event_manager(instance);
 739     libvlc_event_attach(p_em, libvlc_MediaPlayerPlaying,          HandleMediaInstanceStateChanged, self);
 740     libvlc_event_attach(p_em, libvlc_MediaPlayerPaused,           HandleMediaInstanceStateChanged, self);
 741     libvlc_event_attach(p_em, libvlc_MediaPlayerEncounteredError, HandleMediaInstanceStateChanged, self);
 742     libvlc_event_attach(p_em, libvlc_MediaPlayerEndReached,       HandleMediaInstanceStateChanged, self);
 743     /* FIXME: We may want to turn that off when none is interested by that */
 744     libvlc_event_attach(p_em, libvlc_MediaPlayerPositionChanged, HandleMediaPositionChanged,      self);
 745     libvlc_event_attach(p_em, libvlc_MediaPlayerTimeChanged,     HandleMediaTimeChanged,          self);
 746     libvlc_event_attach(p_em, libvlc_MediaPlayerMediaChanged,    HandleMediaPlayerMediaChanged,  self);
 747 }
 748
 749 - (void)unregisterObservers
 750 {
 751     libvlc_event_manager_t * p_em = libvlc_media_player_event_manager(instance);
 752     libvlc_event_detach(p_em, libvlc_MediaPlayerPlaying,          HandleMediaInstanceStateChanged, self);
 753     libvlc_event_detach(p_em, libvlc_MediaPlayerPaused,           HandleMediaInstanceStateChanged, self);
 754     libvlc_event_detach(p_em, libvlc_MediaPlayerEncounteredError, HandleMediaInstanceStateChanged, self);
 755     libvlc_event_detach(p_em, libvlc_MediaPlayerEndReached,       HandleMediaInstanceStateChanged, self);
 756     libvlc_event_detach(p_em, libvlc_MediaPlayerPositionChanged,  HandleMediaPositionChanged,      self);
 757     libvlc_event_detach(p_em, libvlc_MediaPlayerTimeChanged,      HandleMediaTimeChanged,          self);
 758     libvlc_event_detach(p_em, libvlc_MediaPlayerMediaChanged,     HandleMediaPlayerMediaChanged,   self);
 759 }
 760
 761 - (void)mediaPlayerTimeChanged:(NSNumber *)newTime
 762 {
 763     [self willChangeValueForKey:@"time"];
 764     [self willChangeValueForKey:@"remainingTime"];
 765     [cachedTime release];
 766     cachedTime = [[VLCTime timeWithNumber:newTime] retain];
 767     [cachedRemainingTime release];
 768     double currentTime = [[cachedTime numberValue] doubleValue];
 769     double remaining = currentTime / position * (1 - position);
 770     cachedRemainingTime = [[VLCTime timeWithNumber:[NSNumber numberWithDouble:-remaining]] retain];
 771     [self didChangeValueForKey:@"remainingTime"];
 772     [self didChangeValueForKey:@"time"];
 773 }
 774
 775 - (void)delaySleep
 776 {
 777     UpdateSystemActivity(UsrActivity);
 778 }
 779
 780 - (void)mediaPlayerPositionChanged:(NSNumber *)newPosition
 781 {
 782     // This seems to be the most relevant place to delay sleeping and screen saver.
 783     [self delaySleep];
 784
 785     [self willChangeValueForKey:@"position"];
 786     position = [newPosition floatValue];
 787     [self didChangeValueForKey:@"position"];
 788 }
 789
 790 - (void)mediaPlayerStateChanged:(NSNumber *)newState
 791 {
 792     [self willChangeValueForKey:@"state"];
 793     cachedState = [newState intValue];
 794     [self didChangeValueForKey:@"state"];
 795 }
 796
 797 - (void)mediaPlayerMediaChanged:(VLCMedia *)newMedia
 798 {
 799     [self willChangeValueForKey:@"media"];
 800     if (media != newMedia)
 801     {
 802         [media release];
 803         media = [newMedia retain];
 804     }
 805     [self didChangeValueForKey:@"media"];
 806 }
 807
 808 @end