cog/Plugins/TagLib/TagLibMetadataReader.m

142 lines
4.3 KiB
Objective-C

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