add name cache

Signed-off-by: Claudio Cambra <developer@claudiocambra.com>

modules/gui/macosx/Makefile.am

@@ -170,6 +170,8 @@ libmacosx_plugin_la_SOURCES = \
 	gui/macosx/library/VLCLibraryDataSource.h \
 	gui/macosx/library/VLCLibraryDataTypes.h \
 	gui/macosx/library/VLCLibraryDataTypes.m \
+	gui/macosx/library/VLCLibraryNameCache.h \
+	gui/macosx/library/VLCLibraryNameCache.m \
 	gui/macosx/library/VLCLibraryHeroView.h \
 	gui/macosx/library/VLCLibraryHeroView.m \
 	gui/macosx/library/VLCLibraryImageCache.h \

modules/gui/macosx/library/VLCLibraryNameCache.h

@@ -0,0 +1,41 @@
+/*****************************************************************************
+ * VLCLibraryNameCache.h: MacOS X interface module
+ *****************************************************************************
+ * Copyright (C) 2024 VLC authors and VideoLAN
+ *
+ * Authors: Felix Paul Kühne <fkuehne # videolan -dot- org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface VLCLibraryNameCache : NSObject
+
++ (instancetype)sharedInstance;
+
+- (nullable NSString *)albumTitleForID:(int64_t)albumID;
+- (nullable NSString *)albumArtistForID:(int64_t)albumID;
+- (nullable NSString *)genreNameForID:(int64_t)genreID;
+
+- (void)invalidateAlbumWithID:(int64_t)albumID;
+- (void)invalidateGenreWithID:(int64_t)genreID;
+- (void)invalidateAll;
+
+@end
+
+NS_ASSUME_NONNULL_END

modules/gui/macosx/library/VLCLibraryNameCache.m

@@ -0,0 +1,194 @@
+/*****************************************************************************
+ * VLCLibraryNameCache.m: MacOS X interface module
+ *****************************************************************************
+ * Copyright (C) 2024 VLC authors and VideoLAN
+ *
+ * Authors: Felix Paul Kühne <fkuehne # videolan -dot- org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#import "VLCLibraryNameCache.h"
+
+#import "VLCLibraryDataTypes.h"
+#import "VLCLibraryModel.h"
+#import "extensions/NSString+Helpers.h"
+
+#import <vlc_media_library.h>
+
+extern vlc_medialibrary_t * _Nullable getMediaLibrary(void);
+
+@implementation VLCLibraryNameCache {
+    NSCache<NSNumber *, NSString *> *_albumTitleCache;
+    NSCache<NSNumber *, NSString *> *_albumArtistCache;
+    NSCache<NSNumber *, NSString *> *_genreNameCache;
+}
+
++ (instancetype)sharedInstance
+{
+    static VLCLibraryNameCache *instance = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        instance = [[VLCLibraryNameCache alloc] init];
+    });
+    return instance;
+}
+
+- (instancetype)init
+{
+    self = [super init];
+    if (self) {
+        _albumTitleCache = [[NSCache alloc] init];
+        _albumArtistCache = [[NSCache alloc] init];
+        _genreNameCache = [[NSCache alloc] init];
+
+        NSNotificationCenter * const center = NSNotificationCenter.defaultCenter;
+        [center addObserver:self
+                   selector:@selector(handleAlbumUpdate:)
+                       name:VLCLibraryModelAlbumUpdated
+                     object:nil];
+        [center addObserver:self
+                   selector:@selector(handleGenreUpdate:)
+                       name:VLCLibraryModelGenreUpdated
+                     object:nil];
+    }
+    return self;
+}
+
+- (void)dealloc
+{
+    [NSNotificationCenter.defaultCenter removeObserver:self];
+}
+
+- (void)handleAlbumUpdate:(NSNotification *)notification
+{
+    VLCMediaLibraryAlbum * const album = notification.object;
+    if (album) {
+        [self invalidateAlbumWithID:album.libraryID];
+    }
+}
+
+- (void)handleGenreUpdate:(NSNotification *)notification
+{
+    VLCMediaLibraryGenre * const genre = notification.object;
+    if (genre) {
+        [self invalidateGenreWithID:genre.libraryID];
+    }
+}
+
+- (NSString *)albumTitleForID:(int64_t)albumID
+{
+    if (albumID <= 0) {
+        return nil;
+    }
+
+    NSNumber * const key = @(albumID);
+    NSString * const cached = [_albumTitleCache objectForKey:key];
+    if (cached) {
+        return cached;
+    }
+
+    vlc_medialibrary_t * const p_ml = getMediaLibrary();
+    if (!p_ml) {
+        return nil;
+    }
+
+    vlc_ml_album_t * const p_album = vlc_ml_get_album(p_ml, albumID);
+    if (!p_album) {
+        return nil;
+    }
+
+    NSString * const title = toNSStr(p_album->psz_title);
+    NSString * const artist = toNSStr(p_album->psz_artist);
+
+    if (title) {
+        [_albumTitleCache setObject:title forKey:key];
+    }
+    if (artist) {
+        [_albumArtistCache setObject:artist forKey:key];
+    }
+
+    vlc_ml_album_release(p_album);
+    return title;
+}
+
+- (NSString *)albumArtistForID:(int64_t)albumID
+{
+    if (albumID <= 0) {
+        return nil;
+    }
+
+    NSNumber * const key = @(albumID);
+    NSString * const cached = [_albumArtistCache objectForKey:key];
+    if (cached) {
+        return cached;
+    }
+
+    [self albumTitleForID:albumID];
+    return [_albumArtistCache objectForKey:key];
+}
+
+- (NSString *)genreNameForID:(int64_t)genreID
+{
+    if (genreID <= 0) {
+        return nil;
+    }
+
+    NSNumber * const key = @(genreID);
+    NSString * const cached = [_genreNameCache objectForKey:key];
+    if (cached) {
+        return cached;
+    }
+
+    vlc_medialibrary_t * const p_ml = getMediaLibrary();
+    if (!p_ml) {
+        return nil;
+    }
+
+    vlc_ml_genre_t * const p_genre = vlc_ml_get_genre(p_ml, genreID);
+    if (!p_genre) {
+        return nil;
+    }
+
+    NSString * const name = toNSStr(p_genre->psz_name);
+    if (name) {
+        [_genreNameCache setObject:name forKey:key];
+    }
+
+    vlc_ml_genre_release(p_genre);
+    return name;
+}
+
+- (void)invalidateAlbumWithID:(int64_t)albumID
+{
+    NSNumber * const key = @(albumID);
+    [_albumTitleCache removeObjectForKey:key];
+    [_albumArtistCache removeObjectForKey:key];
+}
+
+- (void)invalidateGenreWithID:(int64_t)genreID
+{
+    NSNumber * const key = @(genreID);
+    [_genreNameCache removeObjectForKey:key];
+}
+
+- (void)invalidateAll
+{
+    [_albumTitleCache removeAllObjects];
+    [_albumArtistCache removeAllObjects];
+    [_genreNameCache removeAllObjects];
+}
+
+@end