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         p_md = libvlc_media_new_location([VLCLibrary sharedInstance],
 181                                            [[anURL absoluteString] UTF8String]);
 182
 183         delegate = nil;
 184         metaDictionary = [[NSMutableDictionary alloc] initWithCapacity:3];
 185
 186         // This value is set whenever the demuxer figures out what the length is.
 187         // TODO: Easy way to tell the length of the movie without having to instiate the demuxer.  Maybe cached info?
 188         length = nil;
 189
 190         [self initInternalMediaDescriptor];
 191     }
 192     return self;
 193 }
 194
 195 - (id)initAsNodeWithName:(NSString *)aName
 196 {
 197     if (self = [super init])
 198     {
 199         p_md = libvlc_media_new_as_node([VLCLibrary sharedInstance],
 200                                                    [aName UTF8String]);
 201
 202         delegate = nil;
 203         metaDictionary = [[NSMutableDictionary alloc] initWithCapacity:3];
 204
 205         // This value is set whenever the demuxer figures out what the length is.
 206         // TODO: Easy way to tell the length of the movie without having to instiate the demuxer.  Maybe cached info?
 207         length = nil;
 208
 209         [self initInternalMediaDescriptor];
 210     }
 211     return self;
 212 }
 213
 214 - (void)setValue:(NSString *)value forMeta:(NSString *)meta
 215 {
 216     libvlc_meta_t metaName = [VLCMedia stringToMetaType:meta];
 217     NSAssert(metaName >= 0, @"Invalid meta");
 218     libvlc_media_set_meta(p_md, metaName, [value UTF8String]);
 219 }
 220
 221 - (void)release
 222 {
 223     @synchronized(self)
 224     {
 225         if([self retainCount] <= 1)
 226         {
 227             /* We must make sure we won't receive new event after an upcoming dealloc
 228              * We also may receive a -retain in some event callback that may occcur
 229              * Before libvlc_event_detach. So this can't happen in dealloc */
 230             libvlc_event_manager_t * p_em = libvlc_media_event_manager(p_md);
 231             libvlc_event_detach(p_em, libvlc_MediaMetaChanged,     HandleMediaMetaChanged,     self);
 232             libvlc_event_detach(p_em, libvlc_MediaDurationChanged, HandleMediaDurationChanged, self);
 233             libvlc_event_detach(p_em, libvlc_MediaStateChanged,    HandleMediaStateChanged,    self);
 234             libvlc_event_detach(p_em, libvlc_MediaSubItemAdded,    HandleMediaSubItemAdded,    self);
 235         }
 236         [super release];
 237     }
 238 }
 239
 240 - (void)dealloc
 241 {
 242     // Testing to see if the pointer exists is not required, if the pointer is null
 243     // then the release message is not sent to it.
 244     delegate = nil;
 245     [length release];
 246     [url release];
 247     [subitems release];
 248     [metaDictionary release];
 249
 250     libvlc_media_release( p_md );
 251
 252     [super dealloc];
 253 }
 254
 255 - (NSString *)description
 256 {
 257     NSString * result = [metaDictionary objectForKey:VLCMetaInformationTitle];
 258     return [NSString stringWithFormat:@"<%@ %p> %@", [self className], self, (result ? result : [url absoluteString])];
 259 }
 260
 261 - (NSComparisonResult)compare:(VLCMedia *)media
 262 {
 263     if (self == media)
 264         return NSOrderedSame;
 265     if (!media)
 266         return NSOrderedDescending;
 267     return p_md == [media libVLCMediaDescriptor] ? NSOrderedSame : NSOrderedAscending;
 268 }
 269
 270 @synthesize delegate;
 271
 272 - (VLCTime *)length
 273 {
 274     if (!length)
 275     {
 276         // Try figuring out what the length is
 277         long long duration = libvlc_media_get_duration( p_md );
 278         if (duration > -1)
 279         {
 280             length = [[VLCTime timeWithNumber:[NSNumber numberWithLongLong:duration]] retain];
 281             return [[length retain] autorelease];
 282         }
 283         return [VLCTime nullTime];
 284     }
 285     return [[length retain] autorelease];
 286 }
 287
 288 - (VLCTime *)lengthWaitUntilDate:(NSDate *)aDate
 289 {
 290     static const long long thread_sleep = 10000;
 291
 292     if (!length)
 293     {
 294         // Force preparsing of this item.
 295         [self length];
 296
 297         // wait until we are preparsed
 298         while (!length && ![self isPreparsed] && [aDate timeIntervalSinceNow] > 0)
 299         {
 300             usleep( thread_sleep );
 301         }
 302
 303         // So we're done waiting, but sometimes we trap the fact that the parsing
 304         // was done before the length gets assigned, so lets go ahead and assign
 305         // it ourselves.
 306         if (!length)
 307             return [self length];
 308     }
 309
 310     return [[length retain] autorelease];
 311 }
 312
 313 - (BOOL)isPreparsed
 314 {
 315     return libvlc_media_is_preparsed( p_md );
 316 }
 317
 318 @synthesize url;
 319 @synthesize subitems;
 320 @synthesize metaDictionary;
 321 @synthesize state;
 322
 323 @end
 324
 325 /******************************************************************************
 326  * Implementation VLCMedia (LibVLCBridging)
 327  */
 328 @implementation VLCMedia (LibVLCBridging)
 329
 330 + (id)mediaWithLibVLCMediaDescriptor:(void *)md
 331 {
 332     return [[[VLCMedia alloc] initWithLibVLCMediaDescriptor:md] autorelease];
 333 }
 334
 335 - (id)initWithLibVLCMediaDescriptor:(void *)md
 336 {
 337     if (self = [super init])
 338     {
 339         libvlc_media_retain( md );
 340         p_md = md;
 341
 342         metaDictionary = [[NSMutableDictionary alloc] initWithCapacity:3];
 343         [self initInternalMediaDescriptor];
 344     }
 345     return self;
 346 }
 347
 348 - (void *)libVLCMediaDescriptor
 349 {
 350     return p_md;
 351 }
 352
 353 + (id)mediaWithMedia:(VLCMedia *)media andLibVLCOptions:(NSDictionary *)options
 354 {
 355     libvlc_media_t * p_md;
 356     p_md = libvlc_media_duplicate( [media libVLCMediaDescriptor] );
 357
 358     for( NSString * key in [options allKeys] )
 359     {
 360         libvlc_media_add_option(p_md, [[NSString stringWithFormat:@"%@=#%@", key, [options objectForKey:key]] UTF8String]);
 361     }
 362     return [VLCMedia mediaWithLibVLCMediaDescriptor:p_md];
 363 }
 364
 365 @end
 366
 367 /******************************************************************************
 368  * Implementation VLCMedia (Private)
 369  */
 370 @implementation VLCMedia (Private)
 371
 372 + (libvlc_meta_t)stringToMetaType:(NSString *)string
 373 {
 374     static NSDictionary * stringToMetaDictionary = nil;
 375     // TODO: Thread safe-ize
 376     if( !stringToMetaDictionary )
 377     {
 378 #define VLCStringToMeta( name ) [NSNumber numberWithInt: libvlc_meta_##name], VLCMetaInformation##name
 379         stringToMetaDictionary =
 380             [[NSDictionary dictionaryWithObjectsAndKeys:
 381                 VLCStringToMeta(Title),
 382                 VLCStringToMeta(Artist),
 383                 VLCStringToMeta(Genre),
 384                 VLCStringToMeta(Copyright),
 385                 VLCStringToMeta(Album),
 386                 VLCStringToMeta(TrackNumber),
 387                 VLCStringToMeta(Description),
 388                 VLCStringToMeta(Rating),
 389                 VLCStringToMeta(Date),
 390                 VLCStringToMeta(Setting),
 391                 VLCStringToMeta(URL),
 392                 VLCStringToMeta(Language),
 393                 VLCStringToMeta(NowPlaying),
 394                 VLCStringToMeta(Publisher),
 395                 VLCStringToMeta(ArtworkURL),
 396                 VLCStringToMeta(TrackID),
 397                 nil] retain];
 398 #undef VLCStringToMeta
 399     }
 400     NSNumber * number = [stringToMetaDictionary objectForKey:string];
 401     return number ? [number intValue] : -1;
 402 }
 403
 404 + (NSString *)metaTypeToString:(libvlc_meta_t)type
 405 {
 406 #define VLCMetaToString( name, type )   if (libvlc_meta_##name == type) return VLCMetaInformation##name;
 407     VLCMetaToString(Title, type);
 408     VLCMetaToString(Artist, type);
 409     VLCMetaToString(Genre, type);
 410     VLCMetaToString(Copyright, type);
 411     VLCMetaToString(Album, type);
 412     VLCMetaToString(TrackNumber, type);
 413     VLCMetaToString(Description, type);
 414     VLCMetaToString(Rating, type);
 415     VLCMetaToString(Date, type);
 416     VLCMetaToString(Setting, type);
 417     VLCMetaToString(URL, type);
 418     VLCMetaToString(Language, type);
 419     VLCMetaToString(NowPlaying, type);
 420     VLCMetaToString(Publisher, type);
 421     VLCMetaToString(ArtworkURL, type);
 422     VLCMetaToString(TrackID, type);
 423 #undef VLCMetaToString
 424     return nil;
 425 }
 426
 427 - (void)initInternalMediaDescriptor
 428 {
 429     char * p_url = libvlc_media_get_mrl( p_md );
 430
 431     url = [[NSURL URLWithString:[NSString stringWithUTF8String:p_url]] retain];
 432     if( !url ) /* Attempt to interpret as a file path then */
 433         url = [[NSURL fileURLWithPath:[NSString stringWithUTF8String:p_url]] retain];
 434     free( p_url );
 435
 436     libvlc_media_set_user_data( p_md, (void*)self );
 437
 438     libvlc_event_manager_t * p_em = libvlc_media_event_manager( p_md );
 439     libvlc_event_attach(p_em, libvlc_MediaMetaChanged,     HandleMediaMetaChanged,     self);
 440     libvlc_event_attach(p_em, libvlc_MediaDurationChanged, HandleMediaDurationChanged, self);
 441     libvlc_event_attach(p_em, libvlc_MediaStateChanged,    HandleMediaStateChanged,    self);
 442     libvlc_event_attach(p_em, libvlc_MediaSubItemAdded,    HandleMediaSubItemAdded,    self);
 443
 444     libvlc_media_list_t * p_mlist = libvlc_media_subitems( p_md );
 445
 446     if (!p_mlist)
 447         subitems = nil;
 448     else
 449     {
 450         subitems = [[VLCMediaList mediaListWithLibVLCMediaList:p_mlist] retain];
 451         libvlc_media_list_release( p_mlist );
 452     }
 453
 454     state = LibVLCStateToMediaState(libvlc_media_get_state( p_md ));
 455 }
 456
 457 - (void)fetchMetaInformationFromLibVLCWithType:(NSString *)metaType
 458 {
 459     char * psz_value = libvlc_media_get_meta( p_md, [VLCMedia stringToMetaType:metaType] );
 460     NSString * newValue = psz_value ? [NSString stringWithUTF8String: psz_value] : nil;
 461     NSString * oldValue = [metaDictionary valueForKey:metaType];
 462     free(psz_value);
 463
 464     if ( newValue != oldValue && !(oldValue && newValue && [oldValue compare:newValue] == NSOrderedSame) )
 465     {
 466         // Only fetch the art if needed. (ie, create the NSImage, if it was requested before)
 467         if (isArtFetched && [metaType isEqualToString:VLCMetaInformationArtworkURL])
 468         {
 469             [NSThread detachNewThreadSelector:@selector(fetchMetaInformationForArtWorkWithURL:)
 470                                          toTarget:self
 471                                        withObject:newValue];
 472         }
 473
 474         [metaDictionary setValue:newValue forKeyPath:metaType];
 475     }
 476 }
 477
 478 - (void)fetchMetaInformationForArtWorkWithURL:(NSString *)anURL
 479 {
 480     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 481     NSImage * art = nil;
 482
 483     if( anURL )
 484     {
 485         // Go ahead and load up the art work
 486         NSURL * artUrl = [NSURL URLWithString:[anURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
 487
 488         // Don't attempt to fetch artwork from remote. Core will do that alone
 489         if ([artUrl isFileURL])
 490             art  = [[[NSImage alloc] initWithContentsOfURL:artUrl] autorelease];
 491     }
 492
 493     // If anything was found, lets save it to the meta data dictionary
 494     [self performSelectorOnMainThread:@selector(setArtwork:) withObject:art waitUntilDone:NO];
 495
 496     [pool release];
 497 }
 498
 499 - (void)setArtwork:(NSImage *)art
 500 {
 501     if (!art)
 502     {
 503         [metaDictionary removeObjectForKey:@"artwork"];
 504         return;
 505     }
 506
 507     [metaDictionary setObject:art forKey:@"artwork"];
 508 }
 509
 510 - (void)metaChanged:(NSString *)metaType
 511 {
 512     [self fetchMetaInformationFromLibVLCWithType:metaType];
 513 }
 514
 515 - (void)subItemAdded
 516 {
 517     if( subitems )
 518         return; /* Nothing to do */
 519
 520     libvlc_media_list_t * p_mlist = libvlc_media_subitems( p_md );
 521
 522     NSAssert( p_mlist, @"The mlist shouldn't be nil, we are receiving a subItemAdded");
 523
 524     [self willChangeValueForKey:@"subitems"];
 525     subitems = [[VLCMediaList mediaListWithLibVLCMediaList:p_mlist] retain];
 526     [self didChangeValueForKey:@"subitems"];
 527     libvlc_media_list_release( p_mlist );
 528 }
 529
 530 - (void)setStateAsNumber:(NSNumber *)newStateAsNumber
 531 {
 532     [self setState: [newStateAsNumber intValue]];
 533 }
 534
 535 - (id)valueForKeyPath:(NSString *)keyPath
 536 {
 537     if( !isArtFetched && [keyPath isEqualToString:@"metaDictionary.artwork"])
 538     {
 539         isArtFetched = YES;
 540         /* Force the retrieval of the artwork now that someone asked for it */
 541         [self fetchMetaInformationFromLibVLCWithType: VLCMetaInformationArtworkURL];
 542     }
 543     else if( !areOthersMetaFetched && [keyPath hasPrefix:@"metaDictionary."])
 544     {
 545         areOthersMetaFetched = YES;
 546         /* Force VLCMetaInformationTitle, that will trigger preparsing
 547          * And all the other meta will be added through the libvlc event system */
 548         [self fetchMetaInformationFromLibVLCWithType: VLCMetaInformationTitle];
 549
 550     }
 551     else if( !isArtURLFetched && [keyPath hasPrefix:@"metaDictionary.artworkURL"])
 552     {
 553         isArtURLFetched = YES;
 554         /* Force isArtURLFetched, that will trigger artwork download eventually
 555          * And all the other meta will be added through the libvlc event system */
 556         [self fetchMetaInformationFromLibVLCWithType: VLCMetaInformationArtworkURL];
 557     }
 558
 559     return [super valueForKeyPath:keyPath];
 560 }
 561 @end
 562
 563 /******************************************************************************
 564  * Implementation VLCMedia (VLCMediaPlayerBridging)
 565  */
 566
 567 @implementation VLCMedia (VLCMediaPlayerBridging)
 568
 569 - (void)setLength:(VLCTime *)value
 570 {
 571     if (length && value && [length compare:value] == NSOrderedSame)
 572         return;
 573
 574     [length release];
 575     length = value ? [value retain] : nil;
 576 }
 577
 578 @end