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

   1 /*****************************************************************************
   2  * VLCMedia.m: VLCKit.framework VLCMedia implementation
   3  *****************************************************************************
   4  * Copyright (C) 2007 Pierre d'Herbemont
   5  * Copyright (C) 2007 the VideoLAN team
   6  * $Id$
   7  *
   8  * Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #import "VLCMedia.h"
  26 #import "VLCMediaList.h"
  27 #import "VLCEventManager.h"
  28 #import "VLCLibrary.h"
  29 #import "VLCLibVLCBridging.h"
  30 #include <vlc/libvlc.h>
  31
  32 /* Meta Dictionary Keys */
  33 NSString * VLCMetaInformationTitle          = @"title";
  34 NSString * VLCMetaInformationArtist         = @"artist";
  35 NSString * VLCMetaInformationGenre          = @"genre";
  36 NSString * VLCMetaInformationCopyright      = @"copyright";
  37 NSString * VLCMetaInformationAlbum          = @"album";
  38 NSString * VLCMetaInformationTrackNumber    = @"trackNumber";
  39 NSString * VLCMetaInformationDescription    = @"description";
  40 NSString * VLCMetaInformationRating         = @"rating";
  41 NSString * VLCMetaInformationDate           = @"date";
  42 NSString * VLCMetaInformationSetting        = @"setting";
  43 NSString * VLCMetaInformationURL            = @"url";
  44 NSString * VLCMetaInformationLanguage       = @"language";
  45 NSString * VLCMetaInformationNowPlaying     = @"nowPlaying";
  46 NSString * VLCMetaInformationPublisher      = @"publisher";
  47 NSString * VLCMetaInformationEncodedBy      = @"encodedBy";
  48 NSString * VLCMetaInformationArtworkURL     = @"artworkURL";
  49 NSString * VLCMetaInformationArtwork        = @"artwork";
  50 NSString * VLCMetaInformationTrackID        = @"trackID";
  51
  52 /* Notification Messages */
  53 NSString * VLCMediaMetaChanged              = @"VLCMediaMetaChanged";
  54
  55 /******************************************************************************
  56  * @property (readwrite)
  57  */
  58 @interface VLCMedia ()
  59 @property (readwrite) VLCMediaState state;
  60 @end
  61
  62 /******************************************************************************
  63  * Interface (Private)
  64  */
  65 // TODO: Documentation
  66 @interface VLCMedia (Private)
  67 /* Statics */
  68 + (libvlc_meta_t)stringToMetaType:(NSString *)string;
  69 + (NSString *)metaTypeToString:(libvlc_meta_t)type;
  70
  71 /* Initializers */
  72 - (void)initInternalMediaDescriptor;
  73
  74 /* Operations */
  75 - (void)fetchMetaInformationFromLibVLCWithType:(NSString*)metaType;
  76 - (void)fetchMetaInformationForArtWorkWithURL:(NSString *)anURL;
  77 - (void)setArtwork:(NSImage *)art;
  78
  79 /* Callback Methods */
  80 - (void)metaChanged:(NSString *)metaType;
  81 - (void)subItemAdded;
  82 - (void)setStateAsNumber:(NSNumber *)newStateAsNumber;
  83 @end
  84
  85 static VLCMediaState libvlc_state_to_media_state[] =
  86 {
  87     [libvlc_NothingSpecial] = VLCMediaStateNothingSpecial,
  88     [libvlc_Stopped]        = VLCMediaStateNothingSpecial,
  89     [libvlc_Opening]        = VLCMediaStateNothingSpecial,
  90     [libvlc_Buffering]      = VLCMediaStateBuffering,
  91     [libvlc_Ended]          = VLCMediaStateNothingSpecial,
  92     [libvlc_Error]          = VLCMediaStateError,
  93     [libvlc_Playing]        = VLCMediaStatePlaying,
  94     [libvlc_Paused]         = VLCMediaStatePlaying,
  95 };
  96
  97 static inline VLCMediaState LibVLCStateToMediaState( libvlc_state_t state )
  98 {
  99     return libvlc_state_to_media_state[state];
 100 }
 101
 102 /******************************************************************************
 103  * LibVLC Event Callback
 104  */
 105 static void HandleMediaMetaChanged(const libvlc_event_t * event, void * self)
 106 {
 107     if( event->u.media_meta_changed.meta_type == libvlc_meta_Publisher ||
 108         event->u.media_meta_changed.meta_type == libvlc_meta_NowPlaying )
 109     {
 110         /* Skip those meta. We don't really care about them for now.
 111          * And they occure a lot */
 112         return;
 113     }
 114     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 115     [[VLCEventManager sharedManager] callOnMainThreadObject:self
 116                                                  withMethod:@selector(metaChanged:)
 117                                        withArgumentAsObject:[VLCMedia metaTypeToString:event->u.media_meta_changed.meta_type]];
 118     [pool release];
 119 }
 120
 121 static void HandleMediaDurationChanged(const libvlc_event_t * event, void * self)
 122 {
 123     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 124
 125     [[VLCEventManager sharedManager] callOnMainThreadObject:self
 126                                                  withMethod:@selector(setLength:)
 127                                        withArgumentAsObject:[VLCTime timeWithNumber:
 128                                            [NSNumber numberWithLongLong:event->u.media_duration_changed.new_duration]]];
 129     [pool release];
 130 }
 131
 132 static void HandleMediaStateChanged(const libvlc_event_t * event, void * self)
 133 {
 134     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 135
 136     [[VLCEventManager sharedManager] callOnMainThreadObject:self
 137                                                  withMethod:@selector(setStateAsNumber:)
 138                                        withArgumentAsObject:[NSNumber numberWithInt:
 139                                             LibVLCStateToMediaState(event->u.media_state_changed.new_state)]];
 140     [pool release];
 141 }
 142
 143 static void HandleMediaSubItemAdded(const libvlc_event_t * event, void * self)
 144 {
 145     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 146     [[VLCEventManager sharedManager] callOnMainThreadObject:self
 147                                                  withMethod:@selector(subItemAdded)
 148                                        withArgumentAsObject:nil];
 149     [pool release];
 150 }
 151
 152 /******************************************************************************
 153  * Implementation
 154  */
 155 @implementation VLCMedia
 156 + (id)mediaWithURL:(NSURL *)anURL;
 157 {
 158     return [[[VLCMedia alloc] initWithURL:anURL] autorelease];
 159 }
 160
 161 + (id)mediaWithPath:(NSString *)aPath;
 162 {
 163     return [[[VLCMedia alloc] initWithPath:aPath] autorelease];
 164 }
 165
 166 + (id)mediaAsNodeWithName:(NSString *)aName;
 167 {
 168     return [[[VLCMedia alloc] initAsNodeWithName:aName] autorelease];
 169 }
 170
 171 - (id)initWithPath:(NSString *)aPath
 172 {
 173     return [self initWithURL:[NSURL fileURLWithPath:aPath isDirectory:NO]];
 174 }
 175
 176 - (id)initWithURL:(NSURL *)anURL
 177 {
 178     if (self = [super init])
 179     {
 180         libvlc_exception_t ex;
 181         libvlc_exception_init(&ex);
 182
 183         p_md = libvlc_media_new([VLCLibrary sharedInstance],
 184                                            [[anURL absoluteString] UTF8String],
 185                                            &ex);
 186         catch_exception(&ex);
 187
 188         delegate = nil;
 189         metaDictionary = [[NSMutableDictionary alloc] initWithCapacity:3];
 190
 191         // This value is set whenever the demuxer figures out what the length is.
 192         // TODO: Easy way to tell the length of the movie without having to instiate the demuxer.  Maybe cached info?
 193         length = nil;
 194
 195         [self initInternalMediaDescriptor];
 196     }
 197     return self;
 198 }
 199
 200 - (id)initAsNodeWithName:(NSString *)aName
 201 {
 202     if (self = [super init])
 203     {
 204         libvlc_exception_t ex;
 205         libvlc_exception_init(&ex);
 206
 207         p_md = libvlc_media_new_as_node([VLCLibrary sharedInstance],
 208                                                    [aName UTF8String],
 209                                                    &ex);
 210         catch_exception(&ex);
 211
 212         delegate = nil;
 213         metaDictionary = [[NSMutableDictionary alloc] initWithCapacity:3];
 214
 215         // This value is set whenever the demuxer figures out what the length is.
 216         // TODO: Easy way to tell the length of the movie without having to instiate the demuxer.  Maybe cached info?
 217         length = nil;
 218
 219         [self initInternalMediaDescriptor];
 220     }
 221     return self;
 222 }
 223
 224 - (void)release
 225 {
 226     @synchronized(self)
 227     {
 228         if([self retainCount] <= 1)
 229         {
 230             /* We must make sure we won't receive new event after an upcoming dealloc
 231              * We also may receive a -retain in some event callback that may occcur
 232              * Before libvlc_event_detach. So this can't happen in dealloc */
 233             libvlc_event_manager_t * p_em = libvlc_media_event_manager(p_md);
 234             libvlc_event_detach(p_em, libvlc_MediaMetaChanged,     HandleMediaMetaChanged,     self);
 235             libvlc_event_detach(p_em, libvlc_MediaDurationChanged, HandleMediaDurationChanged, self);
 236             libvlc_event_detach(p_em, libvlc_MediaStateChanged,    HandleMediaStateChanged,    self);
 237             libvlc_event_detach(p_em, libvlc_MediaSubItemAdded,    HandleMediaSubItemAdded,    self);
 238         }
 239         [super release];
 240     }
 241 }
 242
 243 - (void)dealloc
 244 {
 245     // Testing to see if the pointer exists is not required, if the pointer is null
 246     // then the release message is not sent to it.
 247     delegate = nil;
 248     [self setLength:nil];
 249
 250     [url release];
 251     [subitems release];
 252     [metaDictionary release];
 253
 254     libvlc_media_release( p_md );
 255
 256     [super dealloc];
 257 }
 258
 259 - (NSString *)description
 260 {
 261     NSString * result = [metaDictionary objectForKey:VLCMetaInformationTitle];
 262     return [NSString stringWithFormat:@"<%@ %p> %@", [self className], self, (result ? result : [url absoluteString])];
 263 }
 264
 265 - (NSComparisonResult)compare:(VLCMedia *)media
 266 {
 267     if (self == media)
 268         return NSOrderedSame;
 269     if (!media)
 270         return NSOrderedDescending;
 271     return p_md == [media libVLCMediaDescriptor] ? NSOrderedSame : NSOrderedAscending;
 272 }
 273
 274 @synthesize delegate;
 275
 276 - (VLCTime *)length
 277 {
 278     if (!length)
 279     {
 280         // Try figuring out what the length is
 281         long long duration = libvlc_media_get_duration( p_md, NULL );
 282         if (duration > -1)
 283         {
 284             [self setLength:[VLCTime timeWithNumber:[NSNumber numberWithLongLong:duration]]];
 285             return [[length retain] autorelease];
 286         }
 287         return [VLCTime nullTime];
 288     }
 289     return [[length retain] autorelease];
 290 }
 291
 292 - (VLCTime *)lengthWaitUntilDate:(NSDate *)aDate
 293 {
 294     static const long long thread_sleep = 10000;
 295
 296     if (!length)
 297     {
 298         // Force preparsing of this item.
 299         [self length];
 300
 301         // wait until we are preparsed
 302         while (!length && ![self isPreparsed] && [aDate timeIntervalSinceNow] > 0)
 303         {
 304             usleep( thread_sleep );
 305         }
 306
 307         // So we're done waiting, but sometimes we trap the fact that the parsing
 308         // was done before the length gets assigned, so lets go ahead and assign
 309         // it ourselves.
 310         if (!length)
 311             return [self length];
 312     }
 313
 314     return [[length retain] autorelease];
 315 }
 316
 317 - (BOOL)isPreparsed
 318 {
 319     return libvlc_media_is_preparsed( p_md );
 320 }
 321
 322 @synthesize url;
 323 @synthesize subitems;
 324 @synthesize metaDictionary;
 325 @synthesize state;
 326
 327 @end
 328
 329 /******************************************************************************
 330  * Implementation VLCMedia (LibVLCBridging)
 331  */
 332 @implementation VLCMedia (LibVLCBridging)
 333
 334 + (id)mediaWithLibVLCMediaDescriptor:(void *)md
 335 {
 336     return [[[VLCMedia alloc] initWithLibVLCMediaDescriptor:md] autorelease];
 337 }
 338
 339 - (id)initWithLibVLCMediaDescriptor:(void *)md
 340 {
 341     if (self = [super init])
 342     {
 343         libvlc_media_retain( md );
 344         p_md = md;
 345
 346         metaDictionary = [[NSMutableDictionary alloc] initWithCapacity:3];
 347         [self initInternalMediaDescriptor];
 348     }
 349     return self;
 350 }
 351
 352 - (void *)libVLCMediaDescriptor
 353 {
 354     return p_md;
 355 }
 356
 357 + (id)mediaWithMedia:(VLCMedia *)media andLibVLCOptions:(NSDictionary *)options
 358 {
 359     libvlc_media_t * p_md;
 360     p_md = libvlc_media_duplicate( [media libVLCMediaDescriptor] );
 361
 362     for( NSString * key in [options allKeys] )
 363     {
 364         libvlc_media_add_option(p_md, [[NSString stringWithFormat:@"%@=#%@", key, [options objectForKey:key]] UTF8String]);
 365     }
 366     return [VLCMedia mediaWithLibVLCMediaDescriptor:p_md];
 367 }
 368
 369 @end
 370
 371 /******************************************************************************
 372  * Implementation VLCMedia (Private)
 373  */
 374 @implementation VLCMedia (Private)
 375
 376 + (libvlc_meta_t)stringToMetaType:(NSString *)string
 377 {
 378     static NSDictionary * stringToMetaDictionary = nil;
 379     // TODO: Thread safe-ize
 380     if( !stringToMetaDictionary )
 381     {
 382 #define VLCStringToMeta( name ) [NSNumber numberWithInt: libvlc_meta_##name], VLCMetaInformation##name
 383         stringToMetaDictionary =
 384             [[NSDictionary dictionaryWithObjectsAndKeys:
 385                 VLCStringToMeta(Title),
 386                 VLCStringToMeta(Artist),
 387                 VLCStringToMeta(Genre),
 388                 VLCStringToMeta(Copyright),
 389                 VLCStringToMeta(Album),
 390                 VLCStringToMeta(TrackNumber),
 391                 VLCStringToMeta(Description),
 392                 VLCStringToMeta(Rating),
 393                 VLCStringToMeta(Date),
 394                 VLCStringToMeta(Setting),
 395                 VLCStringToMeta(URL),
 396                 VLCStringToMeta(Language),
 397                 VLCStringToMeta(NowPlaying),
 398                 VLCStringToMeta(Publisher),
 399                 VLCStringToMeta(ArtworkURL),
 400                 VLCStringToMeta(TrackID),
 401                 nil] retain];
 402 #undef VLCStringToMeta
 403     }
 404     NSNumber * number = [stringToMetaDictionary objectForKey:string];
 405     return number ? [number intValue] : -1;
 406 }
 407
 408 + (NSString *)metaTypeToString:(libvlc_meta_t)type
 409 {
 410 #define VLCMetaToString( name, type )   if (libvlc_meta_##name == type) return VLCMetaInformation##name;
 411     VLCMetaToString(Title, type);
 412     VLCMetaToString(Artist, type);
 413     VLCMetaToString(Genre, type);
 414     VLCMetaToString(Copyright, type);
 415     VLCMetaToString(Album, type);
 416     VLCMetaToString(TrackNumber, type);
 417     VLCMetaToString(Description, type);
 418     VLCMetaToString(Rating, type);
 419     VLCMetaToString(Date, type);
 420     VLCMetaToString(Setting, type);
 421     VLCMetaToString(URL, type);
 422     VLCMetaToString(Language, type);
 423     VLCMetaToString(NowPlaying, type);
 424     VLCMetaToString(Publisher, type);
 425     VLCMetaToString(ArtworkURL, type);
 426     VLCMetaToString(TrackID, type);
 427 #undef VLCMetaToString
 428     return nil;
 429 }
 430
 431 - (void)initInternalMediaDescriptor
 432 {
 433     char * p_url = libvlc_media_get_mrl( p_md );
 434
 435     url = [[NSURL URLWithString:[NSString stringWithUTF8String:p_url]] retain];
 436     if( !url ) /* Attempt to interpret as a file path then */
 437         url = [[NSURL fileURLWithPath:[NSString stringWithUTF8String:p_url]] retain];
 438     free( p_url );
 439
 440     libvlc_media_set_user_data( p_md, (void*)self );
 441
 442     libvlc_event_manager_t * p_em = libvlc_media_event_manager( p_md );
 443     libvlc_event_attach(p_em, libvlc_MediaMetaChanged,     HandleMediaMetaChanged,     self);
 444     libvlc_event_attach(p_em, libvlc_MediaDurationChanged, HandleMediaDurationChanged, self);
 445     libvlc_event_attach(p_em, libvlc_MediaStateChanged,    HandleMediaStateChanged,    self);
 446     libvlc_event_attach(p_em, libvlc_MediaSubItemAdded,    HandleMediaSubItemAdded,    self);
 447
 448     libvlc_media_list_t * p_mlist = libvlc_media_subitems( p_md );
 449
 450     if (!p_mlist)
 451         subitems = nil;
 452     else
 453     {
 454         subitems = [[VLCMediaList mediaListWithLibVLCMediaList:p_mlist] retain];
 455         libvlc_media_list_release( p_mlist );
 456     }
 457
 458     state = LibVLCStateToMediaState(libvlc_media_get_state( p_md ));
 459 }
 460
 461 - (void)fetchMetaInformationFromLibVLCWithType:(NSString *)metaType
 462 {
 463     char * psz_value = libvlc_media_get_meta( p_md, [VLCMedia stringToMetaType:metaType] );
 464     NSString * newValue = psz_value ? [NSString stringWithUTF8String: psz_value] : nil;
 465     NSString * oldValue = [metaDictionary valueForKey:metaType];
 466     free(psz_value);
 467
 468     if ( newValue != oldValue && !(oldValue && newValue && [oldValue compare:newValue] == NSOrderedSame) )
 469     {
 470         // Only fetch the art if needed. (ie, create the NSImage, if it was requested before)
 471         if (isArtFetched && [metaType isEqualToString:VLCMetaInformationArtworkURL])
 472         {
 473             [NSThread detachNewThreadSelector:@selector(fetchMetaInformationForArtWorkWithURL:)
 474                                          toTarget:self
 475                                        withObject:newValue];
 476         }
 477
 478         [metaDictionary setValue:newValue forKeyPath:metaType];
 479     }
 480 }
 481
 482 - (void)fetchMetaInformationForArtWorkWithURL:(NSString *)anURL
 483 {
 484     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 485     NSImage * art = nil;
 486
 487     if( anURL )
 488     {
 489         // Go ahead and load up the art work
 490         NSURL * artUrl = [NSURL URLWithString:[anURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
 491
 492         // Don't attempt to fetch artwork from remote. Core will do that alone
 493         if ([artUrl isFileURL])
 494             art  = [[[NSImage alloc] initWithContentsOfURL:artUrl] autorelease];
 495     }
 496
 497     // If anything was found, lets save it to the meta data dictionary
 498     [self performSelectorOnMainThread:@selector(setArtwork:) withObject:art waitUntilDone:NO];
 499
 500     [pool release];
 501 }
 502
 503 - (void)setArtwork:(NSImage *)art
 504 {
 505     if (!art)
 506     {
 507         [metaDictionary removeObjectForKey:@"artwork"];
 508         return;
 509     }
 510
 511     [metaDictionary setObject:art forKey:@"artwork"];
 512 }
 513
 514 - (void)metaChanged:(NSString *)metaType
 515 {
 516     [self fetchMetaInformationFromLibVLCWithType:metaType];
 517 }
 518
 519 - (void)subItemAdded
 520 {
 521     if( subitems )
 522         return; /* Nothing to do */
 523
 524     libvlc_media_list_t * p_mlist = libvlc_media_subitems( p_md );
 525
 526     NSAssert( p_mlist, @"The mlist shouldn't be nil, we are receiving a subItemAdded");
 527
 528     [self willChangeValueForKey:@"subitems"];
 529     subitems = [[VLCMediaList mediaListWithLibVLCMediaList:p_mlist] retain];
 530     [self didChangeValueForKey:@"subitems"];
 531     libvlc_media_list_release( p_mlist );
 532 }
 533
 534 - (void)setStateAsNumber:(NSNumber *)newStateAsNumber
 535 {
 536     [self setState: [newStateAsNumber intValue]];
 537 }
 538
 539 - (id)valueForKeyPath:(NSString *)keyPath
 540 {
 541     if( !isArtFetched && [keyPath isEqualToString:@"metaDictionary.artwork"])
 542     {
 543         isArtFetched = YES;
 544         /* Force the retrieval of the artwork now that someone asked for it */
 545         [self fetchMetaInformationFromLibVLCWithType: VLCMetaInformationArtworkURL];
 546     }
 547     else if( !areOthersMetaFetched && [keyPath hasPrefix:@"metaDictionary."])
 548     {
 549         areOthersMetaFetched = YES;
 550         /* Force VLCMetaInformationTitle, that will trigger preparsing
 551          * And all the other meta will be added through the libvlc event system */
 552         [self fetchMetaInformationFromLibVLCWithType: VLCMetaInformationTitle];
 553
 554     }
 555     else if( !isArtURLFetched && [keyPath hasPrefix:@"metaDictionary.artworkURL"])
 556     {
 557         isArtURLFetched = YES;
 558         /* Force isArtURLFetched, that will trigger artwork download eventually
 559          * And all the other meta will be added through the libvlc event system */
 560         [self fetchMetaInformationFromLibVLCWithType: VLCMetaInformationArtworkURL];
 561     }
 562
 563     return [super valueForKeyPath:keyPath];
 564 }
 565 @end
 566
 567 /******************************************************************************
 568  * Implementation VLCMedia (VLCMediaPlayerBridging)
 569  */
 570
 571 @implementation VLCMedia (VLCMediaPlayerBridging)
 572
 573 - (void)setLength:(VLCTime *)value
 574 {
 575     if (length && value && [length compare:value] == NSOrderedSame)
 576         return;
 577
 578     [length release];
 579     length = value ? [value retain] : nil;
 580 }
 581
 582 @end