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     int failure = libvlc_video_take_snapshot(instance, 0, [path UTF8String], width, height);
 333     if (failure)
 334         [[NSException exceptionWithName:@"Can't take a video snapshot" reason:@"No video output" userInfo:nil] raise];
 335 }
 336
 337 - (void)setDeinterlaceFilter:(NSString *)name
 338 {
 339     libvlc_video_set_deinterlace(instance, [name UTF8String]);
 340 }
 341
 342 - (void)setRate:(float)value
 343 {
 344     libvlc_media_player_set_rate(instance, value);
 345 }
 346
 347 - (float)rate
 348 {
 349     return libvlc_media_player_get_rate(instance);
 350 }
 351
 352 - (NSSize)videoSize
 353 {
 354     unsigned height = 0, width = 0;
 355     int failure = libvlc_video_get_size(instance, 0, &width, &height);
 356     if (failure)
 357         [[NSException exceptionWithName:@"Can't get video size" reason:@"No video output" userInfo:nil] raise];
 358     return NSMakeSize(width, height);
 359 }
 360
 361 - (BOOL)hasVideoOut
 362 {
 363     return libvlc_media_player_has_vout(instance);
 364 }
 365
 366 - (float)framesPerSecond
 367 {
 368     return libvlc_media_player_get_fps(instance);
 369 }
 370
 371 - (void)setTime:(VLCTime *)value
 372 {
 373     // Time is managed in seconds, while duration is managed in microseconds
 374     // TODO: Redo VLCTime to provide value numberAsMilliseconds, numberAsMicroseconds, numberAsSeconds, numberAsMinutes, numberAsHours
 375     libvlc_media_player_set_time(instance, value ? [[value numberValue] longLongValue] : 0);
 376 }
 377
 378 - (VLCTime *)time
 379 {
 380     return cachedTime;
 381 }
 382
 383 - (VLCTime *)remainingTime
 384 {
 385     return cachedRemainingTime;
 386 }
 387
 388 - (NSUInteger)fps
 389 {
 390     return libvlc_media_player_get_fps(instance);
 391 }
 392
 393 #pragma mark -
 394 #pragma mark Chapters
 395 - (void)setCurrentChapterIndex:(NSUInteger)value;
 396 {
 397     libvlc_media_player_set_chapter(instance, value);
 398 }
 399
 400 - (NSUInteger)currentChapterIndex
 401 {
 402     NSInteger count = libvlc_media_player_get_chapter_count(instance);
 403     if (count <= 0)
 404         return NSNotFound;
 405     NSUInteger result = libvlc_media_player_get_chapter(instance);
 406     return result;
 407 }
 408
 409 - (void)nextChapter
 410 {
 411     libvlc_media_player_next_chapter(instance);
 412 }
 413
 414 - (void)previousChapter
 415 {
 416     libvlc_media_player_previous_chapter(instance);
 417 }
 418
 419 - (NSArray *)chaptersForTitleIndex:(NSUInteger)title
 420 {
 421     NSInteger count = libvlc_media_player_get_chapter_count(instance);
 422     if (count <= 0)
 423         return [NSArray array];
 424
 425     libvlc_track_description_t *tracks = libvlc_video_get_chapter_description(instance, title);
 426     NSMutableArray *tempArray = [NSMutableArray array];
 427     NSInteger i;
 428     for (i = 0; i < count ; i++)
 429     {
 430         [tempArray addObject:[NSString stringWithUTF8String:tracks->psz_name]];
 431         tracks = tracks->p_next;
 432     }
 433     libvlc_track_description_release(tracks);
 434     return [NSArray arrayWithArray:tempArray];
 435 }
 436
 437 #pragma mark -
 438 #pragma mark Titles
 439
 440 - (void)setCurrentTitleIndex:(NSUInteger)value
 441 {
 442     libvlc_media_player_set_title(instance, value);
 443 }
 444
 445 - (NSUInteger)currentTitleIndex
 446 {
 447     NSInteger count = libvlc_media_player_get_title_count(instance);
 448     if (count <= 0)
 449         return NSNotFound;
 450
 451     return libvlc_media_player_get_title(instance);
 452 }
 453
 454 - (NSUInteger)countOfTitles
 455 {
 456     NSUInteger result = libvlc_media_player_get_title_count(instance);
 457     return result;
 458 }
 459
 460 - (NSArray *)titles
 461 {
 462     libvlc_track_description_t *tracks = libvlc_video_get_title_description(instance);
 463     NSMutableArray *tempArray = [NSMutableArray array];
 464     NSInteger i;
 465     for (i = 0; i < [self countOfTitles] ; i++)
 466     {
 467         [tempArray addObject:[NSString stringWithUTF8String: tracks->psz_name]];
 468         tracks = tracks->p_next;
 469     }
 470     libvlc_track_description_release(tracks);
 471     return [NSArray arrayWithArray: tempArray];
 472 }
 473
 474 #pragma mark -
 475 #pragma mark Audio tracks
 476 - (void)setCurrentAudioTrackIndex:(NSUInteger)value
 477 {
 478     libvlc_audio_set_track( instance, (int)value);
 479 }
 480
 481 - (NSUInteger)currentAudioTrackIndex
 482 {
 483     NSInteger count = libvlc_audio_get_track_count(instance);
 484     if (count <= 0)
 485         return NSNotFound;
 486
 487     NSUInteger result = libvlc_audio_get_track(instance);
 488     return result;
 489 }
 490
 491 - (NSArray *)audioTracks
 492 {
 493     NSInteger count = libvlc_audio_get_track_count(instance);
 494     if (count <= 0)
 495         return [NSArray array];
 496
 497     libvlc_track_description_t *tracks = libvlc_audio_get_track_description(instance);
 498     NSMutableArray *tempArray = [NSMutableArray array];
 499     NSUInteger i;
 500     for (i = 0; i < count ; i++)
 501     {
 502         [tempArray addObject:[NSString stringWithUTF8String: tracks->psz_name]];
 503         tracks = tracks->p_next;
 504     }
 505     libvlc_track_description_release(tracks);
 506
 507     return [NSArray arrayWithArray: tempArray];
 508 }
 509
 510 - (void)setAudioChannel:(NSInteger)value
 511 {
 512     libvlc_audio_set_channel(instance, value);
 513 }
 514
 515 - (NSInteger)audioChannel
 516 {
 517     return libvlc_audio_get_channel(instance);
 518 }
 519
 520 - (void)setMedia:(VLCMedia *)value
 521 {
 522     if (media != value)
 523     {
 524         if (media && [media compare:value] == NSOrderedSame)
 525             return;
 526
 527         [media release];
 528         media = [value retain];
 529
 530         libvlc_media_player_set_media(instance, [media libVLCMediaDescriptor]);
 531     }
 532 }
 533
 534 - (VLCMedia *)media
 535 {
 536     return media;
 537 }
 538
 539 - (BOOL)play
 540 {
 541     libvlc_media_player_play(instance);
 542     return YES;
 543 }
 544
 545 - (void)pause
 546 {
 547     if( [NSThread isMainThread] )
 548     {
 549         /* Hack because we create a dead lock here, when the vout is stopped
 550          * and tries to recontact us on the main thread */
 551         /* FIXME: to do this properly we need to do some locking. We may want
 552          * to move that to libvlc */
 553         [self performSelectorInBackground:@selector(pause) withObject:nil];
 554         return;
 555     }
 556
 557     // Pause the stream
 558     libvlc_media_player_pause(instance);
 559 }
 560
 561 - (void)stop
 562 {
 563     libvlc_media_player_stop(instance);
 564 }
 565
 566 - (void)gotoNextFrame
 567 {
 568     libvlc_media_player_next_frame(instance);
 569
 570 }
 571
 572 - (void)fastForward
 573 {
 574     [self fastForwardAtRate: 2.0];
 575 }
 576
 577 - (void)fastForwardAtRate:(float)rate
 578 {
 579     [self setRate:rate];
 580 }
 581
 582 - (void)rewind
 583 {
 584     [self rewindAtRate: 2.0];
 585 }
 586
 587 - (void)rewindAtRate:(float)rate
 588 {
 589     [self setRate: -rate];
 590 }
 591
 592 - (void)jumpBackward:(NSInteger)interval
 593 {
 594     if( [self isSeekable] )
 595     {
 596         interval = interval * 1000;
 597         [self setTime: [VLCTime timeWithInt: ([[self time] intValue] - interval)]];
 598     }
 599 }
 600
 601 - (void)jumpForward:(NSInteger)interval
 602 {
 603     if( [self isSeekable] )
 604     {
 605         interval = interval * 1000;
 606         [self setTime: [VLCTime timeWithInt: ([[self time] intValue] + interval)]];
 607     }
 608 }
 609
 610 - (void)extraShortJumpBackward
 611 {
 612     [self jumpBackward:3];
 613 }
 614
 615 - (void)extraShortJumpForward
 616 {
 617     [self jumpForward:3];
 618 }
 619
 620 - (void)shortJumpBackward
 621 {
 622     [self jumpBackward:10];
 623 }
 624
 625 - (void)shortJumpForward
 626 {
 627     [self jumpForward:10];
 628 }
 629
 630 - (void)mediumJumpBackward
 631 {
 632     [self jumpBackward:60];
 633 }
 634
 635 - (void)mediumJumpForward
 636 {
 637     [self jumpForward:60];
 638 }
 639
 640 - (void)longJumpBackward
 641 {
 642     [self jumpBackward:300];
 643 }
 644
 645 - (void)longJumpForward
 646 {
 647     [self jumpForward:300];
 648 }
 649
 650 + (NSSet *)keyPathsForValuesAffectingIsPlaying
 651 {
 652     return [NSSet setWithObjects:@"state", nil];
 653 }
 654
 655 - (BOOL)isPlaying
 656 {
 657     VLCMediaPlayerState state = [self state];
 658     return ((state == VLCMediaPlayerStateOpening) || (state == VLCMediaPlayerStateBuffering) ||
 659             (state == VLCMediaPlayerStatePlaying));
 660 }
 661
 662 - (BOOL)willPlay
 663 {
 664     return libvlc_media_player_will_play(instance);
 665 }
 666
 667 static const VLCMediaPlayerState libvlc_to_local_state[] =
 668 {
 669     [libvlc_Stopped]    = VLCMediaPlayerStateStopped,
 670     [libvlc_Opening]    = VLCMediaPlayerStateOpening,
 671     [libvlc_Buffering]  = VLCMediaPlayerStateBuffering,
 672     [libvlc_Playing]    = VLCMediaPlayerStatePlaying,
 673     [libvlc_Paused]     = VLCMediaPlayerStatePaused,
 674     [libvlc_Ended]      = VLCMediaPlayerStateEnded,
 675     [libvlc_Error]      = VLCMediaPlayerStateError
 676 };
 677
 678 - (VLCMediaPlayerState)state
 679 {
 680     return cachedState;
 681 }
 682
 683 - (float)position
 684 {
 685     return position;
 686 }
 687
 688 - (void)setPosition:(float)newPosition
 689 {
 690     libvlc_media_player_set_position(instance, newPosition);
 691 }
 692
 693 - (BOOL)isSeekable
 694 {
 695     return libvlc_media_player_is_seekable(instance);
 696 }
 697
 698 - (BOOL)canPause
 699 {
 700     return libvlc_media_player_can_pause(instance);
 701 }
 702
 703 - (void *)libVLCMediaPlayer
 704 {
 705     return instance;
 706 }
 707 @end
 708
 709 @implementation VLCMediaPlayer (Private)
 710 - (id)initWithDrawable:(id)aDrawable
 711 {
 712     if (self = [super init])
 713     {
 714         delegate = nil;
 715         media = nil;
 716         cachedTime = [[VLCTime nullTime] retain];
 717         cachedRemainingTime = [[VLCTime nullTime] retain];
 718         position = 0.0f;
 719         cachedState = VLCMediaPlayerStateStopped;
 720
 721         // Create a media instance, it doesn't matter what library we start off with
 722         // it will change depending on the media descriptor provided to the media
 723         // instance
 724         libvlc_exception_t ex;
 725         libvlc_exception_init( &ex );
 726         instance = libvlc_media_player_new([VLCLibrary sharedInstance]);
 727         catch_exception( &ex );
 728
 729         [self registerObservers];
 730
 731         [self setDrawable:aDrawable];
 732     }
 733     return self;
 734 }
 735
 736 - (void)registerObservers
 737 {
 738     // Attach event observers into the media instance
 739     libvlc_event_manager_t * p_em = libvlc_media_player_event_manager(instance);
 740     libvlc_event_attach(p_em, libvlc_MediaPlayerPlaying,          HandleMediaInstanceStateChanged, self);
 741     libvlc_event_attach(p_em, libvlc_MediaPlayerPaused,           HandleMediaInstanceStateChanged, self);
 742     libvlc_event_attach(p_em, libvlc_MediaPlayerEncounteredError, HandleMediaInstanceStateChanged, self);
 743     libvlc_event_attach(p_em, libvlc_MediaPlayerEndReached,       HandleMediaInstanceStateChanged, self);
 744     /* FIXME: We may want to turn that off when none is interested by that */
 745     libvlc_event_attach(p_em, libvlc_MediaPlayerPositionChanged, HandleMediaPositionChanged,      self);
 746     libvlc_event_attach(p_em, libvlc_MediaPlayerTimeChanged,     HandleMediaTimeChanged,          self);
 747     libvlc_event_attach(p_em, libvlc_MediaPlayerMediaChanged,    HandleMediaPlayerMediaChanged,  self);
 748 }
 749
 750 - (void)unregisterObservers
 751 {
 752     libvlc_event_manager_t * p_em = libvlc_media_player_event_manager(instance);
 753     libvlc_event_detach(p_em, libvlc_MediaPlayerPlaying,          HandleMediaInstanceStateChanged, self);
 754     libvlc_event_detach(p_em, libvlc_MediaPlayerPaused,           HandleMediaInstanceStateChanged, self);
 755     libvlc_event_detach(p_em, libvlc_MediaPlayerEncounteredError, HandleMediaInstanceStateChanged, self);
 756     libvlc_event_detach(p_em, libvlc_MediaPlayerEndReached,       HandleMediaInstanceStateChanged, self);
 757     libvlc_event_detach(p_em, libvlc_MediaPlayerPositionChanged,  HandleMediaPositionChanged,      self);
 758     libvlc_event_detach(p_em, libvlc_MediaPlayerTimeChanged,      HandleMediaTimeChanged,          self);
 759     libvlc_event_detach(p_em, libvlc_MediaPlayerMediaChanged,     HandleMediaPlayerMediaChanged,   self);
 760 }
 761
 762 - (void)mediaPlayerTimeChanged:(NSNumber *)newTime
 763 {
 764     [self willChangeValueForKey:@"time"];
 765     [self willChangeValueForKey:@"remainingTime"];
 766     [cachedTime release];
 767     cachedTime = [[VLCTime timeWithNumber:newTime] retain];
 768     [cachedRemainingTime release];
 769     double currentTime = [[cachedTime numberValue] doubleValue];
 770     double remaining = currentTime / position * (1 - position);
 771     cachedRemainingTime = [[VLCTime timeWithNumber:[NSNumber numberWithDouble:-remaining]] retain];
 772     [self didChangeValueForKey:@"remainingTime"];
 773     [self didChangeValueForKey:@"time"];
 774 }
 775
 776 - (void)delaySleep
 777 {
 778     UpdateSystemActivity(UsrActivity);
 779 }
 780
 781 - (void)mediaPlayerPositionChanged:(NSNumber *)newPosition
 782 {
 783     // This seems to be the most relevant place to delay sleeping and screen saver.
 784     [self delaySleep];
 785
 786     [self willChangeValueForKey:@"position"];
 787     position = [newPosition floatValue];
 788     [self didChangeValueForKey:@"position"];
 789 }
 790
 791 - (void)mediaPlayerStateChanged:(NSNumber *)newState
 792 {
 793     [self willChangeValueForKey:@"state"];
 794     cachedState = [newState intValue];
 795     [self didChangeValueForKey:@"state"];
 796 }
 797
 798 - (void)mediaPlayerMediaChanged:(VLCMedia *)newMedia
 799 {
 800     [self willChangeValueForKey:@"media"];
 801     if (media != newMedia)
 802     {
 803         [media release];
 804         media = [newMedia retain];
 805     }
 806     [self didChangeValueForKey:@"media"];
 807 }
 808
 809 @end