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
 128 // TODO: Documentation
 129 @interface VLCMediaPlayer (Private)
 130 - (id)initWithDrawable:(id)aDrawable;
 131
 132 - (void)registerObservers;
 133 - (void)unregisterObservers;
 134 - (void)mediaPlayerTimeChanged:(NSNumber *)newTime;
 135 - (void)mediaPlayerPositionChanged:(NSNumber *)newTime;
 136 - (void)mediaPlayerStateChanged:(NSNumber *)newState;
 137 @end
 138
 139 @implementation VLCMediaPlayer
 140
 141 /* Bindings */
 142 + (NSSet *)keyPathsForValuesAffectingValueForKey:(NSString *)key
 143 {
 144     static NSDictionary * dict = nil;
 145     NSSet * superKeyPaths;
 146     if( !dict )
 147     {
 148         dict = [[NSDictionary dictionaryWithObjectsAndKeys:
 149             [NSSet setWithObject:@"state"], @"playing",
 150             [NSSet setWithObjects:@"state", @"media", nil], @"seekable",
 151             [NSSet setWithObjects:@"state", @"media", nil], @"canPause",
 152             [NSSet setWithObjects:@"state", @"media", nil], @"description",
 153             nil] retain];
 154     }
 155     if( (superKeyPaths = [super keyPathsForValuesAffectingValueForKey: key]) )
 156     {
 157         NSMutableSet * ret = [NSMutableSet setWithSet:[dict objectForKey: key]];
 158         [ret unionSet:superKeyPaths];
 159         return ret;
 160     }
 161     return [dict objectForKey: key];
 162 }
 163
 164 /* Contructor */
 165 - (id)init
 166 {
 167     return [self initWithDrawable:nil];
 168 }
 169
 170 - (id)initWithVideoView:(VLCVideoView *)aVideoView
 171 {
 172     return [self initWithDrawable: aVideoView];
 173 }
 174
 175 - (id)initWithVideoLayer:(VLCVideoLayer *)aVideoLayer
 176 {
 177     return [self initWithDrawable: aVideoLayer];
 178 }
 179
 180 - (void)release
 181 {
 182     @synchronized(self)
 183     {
 184         if([self retainCount] <= 1)
 185         {
 186             /* We must make sure we won't receive new event after an upcoming dealloc
 187              * We also may receive a -retain in some event callback that may occcur
 188              * Before libvlc_event_detach. So this can't happen in dealloc */
 189             [self unregisterObservers];
 190         }
 191         [super release];
 192     }
 193 }
 194
 195 - (void)dealloc
 196 {
 197     NSAssert(libvlc_media_player_get_state(instance, NULL) == libvlc_Stopped, @"You released the media player before ensuring that it is stopped");
 198
 199     // Always get rid of the delegate first so we can stop sending messages to it
 200     // TODO: Should we tell the delegate that we're shutting down?
 201     delegate = nil;
 202
 203     // Clear our drawable as we are going to release it, we don't
 204     // want the core to use it from this point. This won't happen as
 205     // the media player must be stopped.
 206     libvlc_media_player_set_nsobject(instance, nil, NULL);
 207
 208     libvlc_media_player_release(instance);
 209
 210     // Get rid of everything else
 211     [media release];
 212     [cachedTime release];
 213     [drawable release];
 214
 215     [super dealloc];
 216 }
 217
 218 - (void)setDelegate:(id)value
 219 {
 220     delegate = value;
 221 }
 222
 223 - (id)delegate
 224 {
 225     return delegate;
 226 }
 227
 228 - (void)setVideoView:(VLCVideoView *)aVideoView
 229 {
 230     [self setDrawable: aVideoView];
 231 }
 232
 233 - (void)setVideoLayer:(VLCVideoLayer *)aVideoLayer
 234 {
 235     [self setDrawable: aVideoLayer];
 236 }
 237
 238 - (void)setDrawable:(id)aDrawable
 239 {
 240     // Make sure that this instance has been associated with the drawing canvas.
 241     libvlc_exception_t ex;
 242     libvlc_exception_init( &ex );
 243     libvlc_media_player_set_nsobject(instance, aDrawable, &ex);
 244     catch_exception( &ex );
 245 }
 246
 247 - (id)drawable
 248 {
 249     libvlc_exception_t ex;
 250     libvlc_exception_init( &ex );
 251     id ret = libvlc_media_player_get_nsobject(instance);
 252     catch_exception( &ex );
 253     return ret;
 254 }
 255
 256 - (VLCAudio *)audio
 257 {
 258     return [[VLCLibrary sharedLibrary] audio];
 259 }
 260
 261 - (void)setVideoAspectRatio:(char *)value
 262 {
 263     libvlc_exception_t ex;
 264     libvlc_exception_init( &ex );
 265     libvlc_video_set_aspect_ratio( instance, value, &ex );
 266     catch_exception( &ex );
 267 }
 268
 269 - (char *)videoAspectRatio
 270 {
 271     libvlc_exception_t ex;
 272     libvlc_exception_init( &ex );
 273     char * result = libvlc_video_get_aspect_ratio( instance, &ex );
 274     catch_exception( &ex );
 275     return result;
 276 }
 277
 278 - (void)setVideoSubTitles:(int)value
 279 {
 280     libvlc_exception_t ex;
 281     libvlc_exception_init( &ex );
 282     libvlc_video_set_spu( instance, value, &ex );
 283     catch_exception( &ex );
 284 }
 285
 286 - (int)countOfVideoSubTitles
 287 {
 288     libvlc_exception_t ex;
 289     libvlc_exception_init( &ex );
 290     int result = libvlc_video_get_spu( instance, &ex );
 291     catch_exception( &ex );
 292     return result;
 293 }
 294
 295 - (int)currentVideoSubTitles
 296 {
 297     libvlc_exception_t ex;
 298     libvlc_exception_init( &ex );
 299     int result = libvlc_video_get_spu( instance, &ex );
 300     if (libvlc_exception_raised(&ex))
 301     {
 302         libvlc_exception_clear(&ex);
 303         return -1;
 304     }
 305     else
 306     {
 307         libvlc_exception_clear(&ex);
 308         return result;
 309     }
 310 }
 311
 312 - (void)setVideoCropGeometry:(char *)value
 313 {
 314     libvlc_exception_t ex;
 315     libvlc_exception_init( &ex );
 316     libvlc_video_set_crop_geometry( instance, value, &ex );
 317     catch_exception( &ex );
 318 }
 319
 320 - (char *)videoCropGeometry
 321 {
 322     libvlc_exception_t ex;
 323     libvlc_exception_init( &ex );
 324     char * result = libvlc_video_get_crop_geometry( instance, &ex );
 325     catch_exception( &ex );
 326     return result;
 327 }
 328
 329 - (void)setVideoTeleText:(int)value
 330 {
 331     libvlc_exception_t ex;
 332     libvlc_exception_init( &ex );
 333     libvlc_video_set_teletext( instance, value, &ex );
 334     catch_exception( &ex );
 335 }
 336
 337 - (int)videoTeleText
 338 {
 339     libvlc_exception_t ex;
 340     libvlc_exception_init( &ex );
 341     int result = libvlc_video_get_teletext( instance, &ex );
 342     catch_exception( &ex );
 343     return result;
 344 }
 345
 346 - (void)saveVideoSnapshotAt: (NSString *)path withWidth:(NSUInteger)width andHeight:(NSUInteger)height
 347 {
 348     libvlc_exception_t ex;
 349     libvlc_exception_init( &ex );
 350     libvlc_video_take_snapshot( instance, [path UTF8String], width, height, &ex );
 351     catch_exception( &ex );
 352 }
 353
 354 - (void)setDeinterlaceFilter: (NSString *)name enabled: (BOOL)enabled
 355 {
 356     libvlc_exception_t ex;
 357     libvlc_exception_init( &ex );
 358     libvlc_video_set_deinterlace( instance, (int)enabled , [name UTF8String], &ex );
 359     catch_exception( &ex );
 360 }
 361
 362 - (void)setRate:(float)value
 363 {
 364     libvlc_exception_t ex;
 365     libvlc_exception_init( &ex );
 366     libvlc_media_player_set_rate( instance, value, &ex );
 367     catch_exception( &ex );
 368 }
 369
 370 - (float)rate
 371 {
 372     libvlc_exception_t ex;
 373     libvlc_exception_init( &ex );
 374     float result = libvlc_media_player_get_rate( instance, &ex );
 375     catch_exception( &ex );
 376     return result;
 377 }
 378
 379 - (NSSize)videoSize
 380 {
 381     libvlc_exception_t ex;
 382     libvlc_exception_init( &ex );
 383     NSSize result = NSMakeSize(libvlc_video_get_height((libvlc_media_player_t *)instance, &ex),
 384                                libvlc_video_get_width((libvlc_media_player_t *)instance, &ex));
 385     catch_exception( &ex );
 386     return result;
 387 }
 388
 389 - (BOOL)hasVideoOut
 390 {
 391     libvlc_exception_t ex;
 392     libvlc_exception_init( &ex );
 393     BOOL result = libvlc_media_player_has_vout((libvlc_media_player_t *)instance, &ex);
 394     if (libvlc_exception_raised( &ex ))
 395     {
 396         libvlc_exception_clear( &ex );
 397         return NO;
 398     }
 399     else
 400         return result;
 401 }
 402
 403 - (float)framesPerSecond
 404 {
 405     libvlc_exception_t ex;
 406     libvlc_exception_init( &ex );
 407     float result = libvlc_media_player_get_fps( (libvlc_media_player_t *)instance, &ex );
 408     catch_exception( &ex );
 409     return result;
 410 }
 411
 412 - (void)setTime:(VLCTime *)value
 413 {
 414     libvlc_exception_t ex;
 415     libvlc_exception_init( &ex );
 416     // Time is managed in seconds, while duration is managed in microseconds
 417     // TODO: Redo VLCTime to provide value numberAsMilliseconds, numberAsMicroseconds, numberAsSeconds, numberAsMinutes, numberAsHours
 418     libvlc_media_player_set_time( (libvlc_media_player_t *)instance,
 419                                     (value ? [[value numberValue] longLongValue] / 1000 : 0),
 420                                     &ex );
 421     catch_exception( &ex );
 422 }
 423
 424 - (VLCTime *)time
 425 {
 426     return cachedTime;
 427 }
 428
 429 - (VLCTime *)remainingTime
 430 {
 431     double currentTime = [[cachedTime numberValue] doubleValue];
 432     double remaining = currentTime / position * (1 - position);
 433     return [VLCTime timeWithNumber:[NSNumber numberWithDouble:-remaining]];
 434 }
 435
 436 - (int)fps
 437 {
 438     libvlc_exception_t ex;
 439     libvlc_exception_init( &ex );
 440     int result = libvlc_media_player_get_fps( instance, &ex );
 441     catch_exception( &ex );
 442     return result;
 443 }
 444
 445 - (void)setChapter:(int)value;
 446 {
 447     libvlc_exception_t ex;
 448     libvlc_exception_init( &ex );
 449     libvlc_media_player_set_chapter( instance, value, &ex );
 450     catch_exception( &ex );
 451 }
 452
 453 - (int)currentChapter
 454 {
 455     libvlc_exception_t ex;
 456     libvlc_exception_init( &ex );
 457     int result = libvlc_media_player_get_chapter( instance, &ex );
 458     catch_exception( &ex );
 459     return result;
 460 }
 461
 462 - (int)countOfChapters
 463 {
 464     libvlc_exception_t ex;
 465     libvlc_exception_init( &ex );
 466     int result = libvlc_media_player_get_chapter_count( instance, &ex );
 467     catch_exception( &ex );
 468     return result;
 469 }
 470
 471 - (void)nextChapter
 472 {
 473     libvlc_exception_t ex;
 474     libvlc_exception_init( &ex );
 475     libvlc_media_player_next_chapter( instance, &ex );
 476     catch_exception( &ex );
 477 }
 478
 479 - (void)previousChapter
 480 {
 481     libvlc_exception_t ex;
 482     libvlc_exception_init( &ex );
 483     libvlc_media_player_previous_chapter( instance, &ex );
 484     catch_exception( &ex );
 485 }
 486
 487 - (void)setCurrentTitle:(int)value
 488 {
 489     libvlc_exception_t ex;
 490     libvlc_exception_init( &ex );
 491     libvlc_media_player_set_title( instance, value, &ex );
 492     catch_exception( &ex );
 493 }
 494
 495 - (int)currentTitle
 496 {
 497     libvlc_exception_t ex;
 498     libvlc_exception_init( &ex );
 499     int result = libvlc_media_player_get_title( instance, &ex );
 500     catch_exception( &ex );
 501     return result;
 502 }
 503
 504 - (int)countOfTitles
 505 {
 506     libvlc_exception_t ex;
 507     libvlc_exception_init( &ex );
 508     int result = libvlc_media_player_get_title_count( instance, &ex );
 509     catch_exception( &ex );
 510     return result;
 511 }
 512
 513 - (void)setAudioTrack:(int)value
 514 {
 515     libvlc_exception_t ex;
 516     libvlc_exception_init( &ex );
 517     libvlc_audio_set_track( instance, value, &ex );
 518     catch_exception( &ex );
 519 }
 520
 521 - (int)currentAudioTrack
 522 {
 523     libvlc_exception_t ex;
 524     libvlc_exception_init( &ex );
 525     int result = libvlc_audio_get_track( instance, &ex );
 526     catch_exception( &ex );
 527     return result;
 528 }
 529
 530 - (int)countOfAudioTracks
 531 {
 532     libvlc_exception_t ex;
 533     libvlc_exception_init( &ex );
 534     int result = libvlc_audio_get_track_count( instance, &ex );
 535     catch_exception( &ex );
 536     return result;
 537 }
 538
 539 - (void)setAudioChannel:(int)value
 540 {
 541     libvlc_exception_t ex;
 542     libvlc_exception_init( &ex );
 543     libvlc_audio_set_channel( instance, value, &ex );
 544     catch_exception( &ex );
 545 }
 546
 547 - (int)audioChannel
 548 {
 549     libvlc_exception_t ex;
 550     libvlc_exception_init( &ex );
 551     int result = libvlc_audio_get_channel( instance, &ex );
 552     catch_exception( &ex );
 553     return result;
 554 }
 555
 556 - (void)setMedia:(VLCMedia *)value
 557 {
 558     if (media != value)
 559     {
 560         if (media && [media compare:value] == NSOrderedSame)
 561             return;
 562
 563         [media release];
 564         media = [value retain];
 565
 566         libvlc_exception_t ex;
 567         libvlc_exception_init( &ex );
 568         libvlc_media_player_set_media( instance, [media libVLCMediaDescriptor], &ex );
 569         catch_exception( &ex );
 570     }
 571 }
 572
 573 - (VLCMedia *)media
 574 {
 575     return media;
 576 }
 577
 578 - (BOOL)play
 579 {
 580     libvlc_exception_t ex;
 581     libvlc_exception_init( &ex );
 582     libvlc_media_player_play( (libvlc_media_player_t *)instance, &ex );
 583     catch_exception( &ex );
 584     return YES;
 585 }
 586
 587 - (void)pause
 588 {
 589     if( [NSThread isMainThread] )
 590     {
 591         /* Hack because we create a dead lock here, when the vout is stopped
 592          * and tries to recontact us on the main thread */
 593         /* FIXME: to do this properly we need to do some locking. We may want
 594          * to move that to libvlc */
 595         [self performSelectorInBackground:@selector(pause) withObject:nil];
 596         return;
 597     }
 598
 599     // Pause the stream
 600     libvlc_exception_t ex;
 601     libvlc_exception_init( &ex );
 602     libvlc_media_player_pause( (libvlc_media_player_t *)instance, &ex );
 603
 604     // fail gracefully
 605     // in most cases, it's just EOF so let's stop
 606     if (libvlc_exception_raised(&ex))
 607         [self stop];
 608
 609     libvlc_exception_clear(&ex);
 610 }
 611
 612 - (void)stop
 613 {
 614     libvlc_exception_t ex;
 615     libvlc_exception_init( &ex );
 616     libvlc_media_player_stop((libvlc_media_player_t *)instance, &ex);
 617     catch_exception( &ex );
 618 }
 619
 620 - (void)fastForward
 621 {
 622     [self fastForwardAtRate: 2.0];
 623 }
 624
 625 - (void)fastForwardAtRate:(float)rate
 626 {
 627     [self setRate:rate];
 628 }
 629
 630 - (void)rewind
 631 {
 632     [self rewindAtRate: 2.0];
 633 }
 634
 635 - (void)rewindAtRate:(float)rate
 636 {
 637     [self setRate: -rate];
 638 }
 639
 640 - (void)jumpBackward:(NSInteger)interval
 641 {
 642     if( [self isSeekable] )
 643     {
 644         interval = interval * 1000000;
 645         [self setTime: [VLCTime timeWithInt: ([[self time] intValue] - interval)]];
 646     }
 647 }
 648
 649 - (void)jumpForward:(NSInteger)interval
 650 {
 651     if( [self isSeekable] )
 652     {
 653         interval = interval * 1000000;
 654         [self setTime: [VLCTime timeWithInt: ([[self time] intValue] + interval)]];
 655     }
 656 }
 657
 658 - (void)extraShortJumpBackward
 659 {
 660     [self jumpBackward:3];
 661 }
 662
 663 - (void)extraShortJumpForward
 664 {
 665     [self jumpForward:3];
 666 }
 667
 668 - (void)shortJumpBackward
 669 {
 670     [self jumpBackward:10];
 671 }
 672
 673 - (void)shortJumpForward
 674 {
 675     [self jumpForward:10];
 676 }
 677
 678 - (void)mediumJumpBackward
 679 {
 680     [self jumpBackward:60];
 681 }
 682
 683 - (void)mediumJumpForward
 684 {
 685     [self jumpForward:60];
 686 }
 687
 688 - (void)longJumpBackward
 689 {
 690     [self jumpBackward:300];
 691 }
 692
 693 - (void)longJumpForward
 694 {
 695     [self jumpForward:300];
 696 }
 697
 698 + (NSSet *)keyPathsForValuesAffectingIsPlaying
 699 {
 700     return [NSSet setWithObjects:@"state", nil];
 701 }
 702
 703 - (BOOL)isPlaying
 704 {
 705     VLCMediaPlayerState state = [self state];
 706     return ((state == VLCMediaPlayerStateOpening) || (state == VLCMediaPlayerStateBuffering) ||
 707             (state == VLCMediaPlayerStatePlaying));
 708 }
 709
 710 - (BOOL)willPlay
 711 {
 712     libvlc_exception_t ex;
 713     libvlc_exception_init( &ex );
 714     BOOL ret = libvlc_media_player_will_play( (libvlc_media_player_t *)instance, &ex );
 715     if (libvlc_exception_raised(&ex))
 716     {
 717         libvlc_exception_clear(&ex);
 718         return NO;
 719     }
 720     else
 721         return ret;
 722 }
 723
 724 static const VLCMediaPlayerState libvlc_to_local_state[] =
 725 {
 726     [libvlc_Stopped]    = VLCMediaPlayerStateStopped,
 727     [libvlc_Opening]    = VLCMediaPlayerStateOpening,
 728     [libvlc_Buffering]  = VLCMediaPlayerStateBuffering,
 729     [libvlc_Playing]    = VLCMediaPlayerStatePlaying,
 730     [libvlc_Paused]     = VLCMediaPlayerStatePaused,
 731     [libvlc_Ended]      = VLCMediaPlayerStateEnded,
 732     [libvlc_Error]      = VLCMediaPlayerStateError
 733 };
 734
 735 - (VLCMediaPlayerState)state
 736 {
 737     return cachedState;
 738 }
 739
 740 - (float)position
 741 {
 742     return position;
 743 }
 744
 745 - (void)setPosition:(float)newPosition
 746 {
 747     libvlc_exception_t ex;
 748     libvlc_exception_init( &ex );
 749     libvlc_media_player_set_position( instance, newPosition, &ex );
 750     catch_exception( &ex );
 751 }
 752
 753 - (BOOL)isSeekable
 754 {
 755     libvlc_exception_t ex;
 756     libvlc_exception_init( &ex );
 757     BOOL ret = libvlc_media_player_is_seekable( instance, &ex );
 758     catch_exception( &ex );
 759     return ret;
 760 }
 761
 762 - (BOOL)canPause
 763 {
 764     libvlc_exception_t ex;
 765     libvlc_exception_init( &ex );
 766     BOOL ret = libvlc_media_player_can_pause( instance, &ex );
 767     catch_exception( &ex );
 768     return ret;
 769 }
 770
 771 - (void *)libVLCMediaPlayer
 772 {
 773     return instance;
 774 }
 775 @end
 776
 777 @implementation VLCMediaPlayer (Private)
 778 - (id)initWithDrawable:(id)aDrawable
 779 {
 780     if (self = [super init])
 781     {
 782         delegate = nil;
 783         media = nil;
 784         cachedTime = [[VLCTime nullTime] retain];
 785         position = 0.0f;
 786         cachedState = VLCMediaPlayerStateStopped;
 787
 788         // Create a media instance, it doesn't matter what library we start off with
 789         // it will change depending on the media descriptor provided to the media
 790         // instance
 791         libvlc_exception_t ex;
 792         libvlc_exception_init( &ex );
 793         instance = (void *)libvlc_media_player_new([VLCLibrary sharedInstance], &ex);
 794         catch_exception( &ex );
 795
 796         [self registerObservers];
 797
 798         [self setDrawable:aDrawable];
 799     }
 800     return self;
 801 }
 802
 803 - (void)registerObservers
 804 {
 805     libvlc_exception_t ex;
 806     libvlc_exception_init( &ex );
 807
 808     // Attach event observers into the media instance
 809     libvlc_event_manager_t * p_em = libvlc_media_player_event_manager( instance, &ex );
 810     libvlc_event_attach( p_em, libvlc_MediaPlayerPlaying,          HandleMediaInstanceStateChanged, self, &ex );
 811     libvlc_event_attach( p_em, libvlc_MediaPlayerPaused,           HandleMediaInstanceStateChanged, self, &ex );
 812     libvlc_event_attach( p_em, libvlc_MediaPlayerEncounteredError, HandleMediaInstanceStateChanged, self, &ex );
 813     libvlc_event_attach( p_em, libvlc_MediaPlayerEndReached,       HandleMediaInstanceStateChanged, self, &ex );
 814     /* FIXME: We may want to turn that off when none is interested by that */
 815     libvlc_event_attach( p_em, libvlc_MediaPlayerPositionChanged, HandleMediaPositionChanged,      self, &ex );
 816     libvlc_event_attach( p_em, libvlc_MediaPlayerTimeChanged,     HandleMediaTimeChanged,          self, &ex );
 817     catch_exception( &ex );
 818 }
 819
 820 - (void)unregisterObservers
 821 {
 822     libvlc_event_manager_t * p_em = libvlc_media_player_event_manager( instance, NULL );
 823     libvlc_event_detach( p_em, libvlc_MediaPlayerPlaying,          HandleMediaInstanceStateChanged, self, NULL );
 824     libvlc_event_detach( p_em, libvlc_MediaPlayerPaused,           HandleMediaInstanceStateChanged, self, NULL );
 825     libvlc_event_detach( p_em, libvlc_MediaPlayerEncounteredError, HandleMediaInstanceStateChanged, self, NULL );
 826     libvlc_event_detach( p_em, libvlc_MediaPlayerEndReached,       HandleMediaInstanceStateChanged, self, NULL );
 827     libvlc_event_detach( p_em, libvlc_MediaPlayerPositionChanged,  HandleMediaPositionChanged,      self, NULL );
 828     libvlc_event_detach( p_em, libvlc_MediaPlayerTimeChanged,      HandleMediaTimeChanged,          self, NULL );
 829 }
 830
 831 - (void)mediaPlayerTimeChanged:(NSNumber *)newTime
 832 {
 833     [self willChangeValueForKey:@"time"];
 834     [self willChangeValueForKey:@"remainingTime"];
 835     [cachedTime release];
 836     cachedTime = [[VLCTime timeWithNumber:newTime] retain];
 837
 838     [self didChangeValueForKey:@"remainingTime"];
 839     [self didChangeValueForKey:@"time"];
 840 }
 841
 842 - (void)delaySleep
 843 {
 844     UpdateSystemActivity(UsrActivity);
 845 }
 846
 847 - (void)mediaPlayerPositionChanged:(NSNumber *)newPosition
 848 {
 849     // This seems to be the most relevant place to delay sleeping and screen saver.
 850     [self delaySleep];
 851
 852     [self willChangeValueForKey:@"position"];
 853     position = [newPosition floatValue];
 854     [self didChangeValueForKey:@"position"];
 855 }
 856
 857 - (void)mediaPlayerStateChanged:(NSNumber *)newState
 858 {
 859     [self willChangeValueForKey:@"state"];
 860     cachedState = [newState intValue];
 861     [self didChangeValueForKey:@"state"];
 862 }
 863
 864 @end