144 lines
4.5 KiB
Objective-C
144 lines
4.5 KiB
Objective-C
//
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// TagLibMetadataReader.m
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// TagLib
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//
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// Created by Vincent Spader on 2/24/07.
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// Copyright 2007 __MyCompanyName__. All rights reserved.
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//
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#import "TagLibMetadataReader.h"
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#import <TagLib/fileref.h>
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#import <TagLib/tag.h>
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#import <Taglib/mpegfile.h>
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#import <Taglib/id3v2tag.h>
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#import <Taglib/attachedpictureframe.h>
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@implementation TagLibMetadataReader
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+ (NSDictionary *)metadataForURL:(NSURL *)url
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{
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if (![url isFileURL]) {
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return [NSDictionary dictionary];
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}
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NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
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TagLib::FileRef f((const char *)[[url path] UTF8String], false);
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if (!f.isNull())
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{
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const TagLib::Tag *tag = f.tag();
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if (tag)
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{
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TagLib::String artist, title, album, genre, comment;
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int year, track;
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float rgAlbumGain, rgAlbumPeak, rgTrackGain, rgTrackPeak;
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artist = tag->artist();
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title = tag->title();;
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album = tag->album();
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genre = tag->genre();
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comment = tag->comment();
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year = tag->year();
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[dict setObject:[NSNumber numberWithInt:year] forKey:@"year"];
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track = tag->track();
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[dict setObject:[NSNumber numberWithInt:track] forKey:@"track"];
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rgAlbumGain = tag->rgAlbumGain();
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rgAlbumPeak = tag->rgAlbumPeak();
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rgTrackGain = tag->rgTrackGain();
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rgTrackPeak = tag->rgTrackPeak();
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[dict setObject:[NSNumber numberWithFloat:rgAlbumGain] forKey:@"replayGainAlbumGain"];
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[dict setObject:[NSNumber numberWithFloat:rgAlbumPeak] forKey:@"replayGainAlbumPeak"];
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[dict setObject:[NSNumber numberWithFloat:rgTrackGain] forKey:@"replayGainTrackGain"];
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[dict setObject:[NSNumber numberWithFloat:rgTrackPeak] forKey:@"replayGainTrackPeak"];
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if (!artist.isNull())
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[dict setObject:[NSString stringWithUTF8String:artist.toCString(true)] forKey:@"artist"];
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if (!album.isNull())
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[dict setObject:[NSString stringWithUTF8String:album.toCString(true)] forKey:@"album"];
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if (!title.isNull())
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[dict setObject:[NSString stringWithUTF8String:title.toCString(true)] forKey:@"title"];
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if (!genre.isNull())
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[dict setObject:[NSString stringWithUTF8String:genre.toCString(true)] forKey:@"genre"];
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}
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NSString *imageCacheTag = [NSString stringWithFormat:@"%@-%@-%@-%@", [dict objectForKey:@"album"], [dict objectForKey:@"artist"], [dict objectForKey:@"genre"], [dict objectForKey:@"year"]];
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// Try to load the image.
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NSData * image = nil;
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// WARNING: HACK
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TagLib::MPEG::File *mf = dynamic_cast<TagLib::MPEG::File *>(f.file());
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if (mf) {
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TagLib::ID3v2::Tag *tag = mf->ID3v2Tag();
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if (tag) {
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TagLib::ID3v2::FrameList pictures = mf->ID3v2Tag()->frameListMap()["APIC"];
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if (!pictures.isEmpty()) {
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TagLib::ID3v2::AttachedPictureFrame *pic = static_cast<TagLib::ID3v2::AttachedPictureFrame *>(pictures.front());
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image = [NSData dataWithBytes:pic->picture().data() length:pic->picture().size()];
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}
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}
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}
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if (nil == image) {
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// Try to load image from external file
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NSString *path = [[url path] stringByDeletingLastPathComponent];
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// Gather list of candidate image files
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NSArray *fileNames = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:nil];
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NSArray *imageFileNames = [fileNames pathsMatchingExtensions:[NSImage imageFileTypes]];
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for (NSString *fileName in imageFileNames) {
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if ([TagLibMetadataReader isCoverFile:fileName]) {
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image = [NSData dataWithContentsOfFile:[path stringByAppendingPathComponent:fileName]];
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break;
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}
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}
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}
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if (nil != image) {
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[dict setObject:image forKey:@"albumArt"];
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}
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}
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return [dict autorelease];
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}
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+ (BOOL)isCoverFile:(NSString *)fileName
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{
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for (NSString *coverFileName in [TagLibMetadataReader coverNames]) {
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if ([[[[fileName lastPathComponent] stringByDeletingPathExtension] lowercaseString] hasSuffix:coverFileName]) {
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return true;
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}
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}
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return false;
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}
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+ (NSArray *)coverNames
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{
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return [NSArray arrayWithObjects:@"cover", @"folder", @"album", @"front", nil];
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}
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+ (NSArray *)fileTypes
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{
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//May be a way to get a list of supported formats
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return [NSArray arrayWithObjects:@"ape", @"asf", @"wma", @"ogg", @"opus", @"mpc", @"flac", @"m4a", @"mp3", @"tak", nil];
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}
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+ (NSArray *)mimeTypes
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{
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return [NSArray arrayWithObjects:@"audio/x-ape", @"audio/x-ms-wma", @"application/ogg", @"application/x-ogg", @"audio/x-vorbis+ogg", @"audio/x-musepack", @"audio/x-flac", @"audio/x-m4a", @"audio/mpeg", @"audio/x-mp3", @"audio/x-tak", nil];
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}
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@end
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