//
// 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/mpcproperties.h>
#import <taglib/audioproperties.h>
#import <taglib/mpeg/mpegfile.h>
#import <taglib/mp4/mp4file.h>
#import <taglib/xiphcomment.h>
#import <taglib/vorbisfile.h>
#import <taglib/flacfile.h>
#import <taglib/mpeg/id3v2/id3v2tag.h>
#import <taglib/mpeg/id3v2/frames/attachedpictureframe.h>
@implementation TagLibMetadataReader
+ (NSDictionary *)metadataForURL:(NSURL *)url
{
if (![url isFileURL]) {
return [NSDictionary dictionary];
}
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
// if ( !*TagLib::ascii_encoding ) {
// NSStringEncoding enc = [NSString defaultCStringEncoding];
// CFStringEncoding cfenc = CFStringConvertNSStringEncodingToEncoding(enc);
// NSString *ref = (NSString *)CFStringConvertEncodingToIANACharSetName(cfenc);
// UInt32 cp = CFStringConvertEncodingToWindowsCodepage(cfenc);
//
// // Most tags are using windows codepage, so remap OS X codepage to Windows one.
//
// static struct {
// UInt32 from, to;
// } codepage_remaps[] = {
// { 10001, 932 }, // Japanese Shift-JIS
// { 10002, 950 }, // Traditional Chinese
// { 10003, 949 }, // Korean
// { 10004, 1256 }, // Arabic
// { 10005, 1255 }, // Hebrew
// { 10006, 1253 }, // Greek
// { 10007, 1251 }, // Cyrillic
// { 10008, 936 }, // Simplified Chinese
// { 10029, 1250 }, // Central European (latin2)
// };
//
// int i;
// int max = sizeof(codepage_remaps)/sizeof(codepage_remaps[0]);
// for ( i=0; i<max; i++ )
// if ( codepage_remaps[i].from == cp )
// break;
// if ( i < max )
// sprintf(TagLib::ascii_encoding, "windows-%d", codepage_remaps[i].to);
// else
// strcpy(TagLib::ascii_encoding, [ref UTF8String]);
//
// }
TagLib::FileRef f((const char *)[[url path] UTF8String], false);
if (!f.isNull())
{
const TagLib::Tag *tag = f.tag();
if (tag)
{
TagLib::String artist, albumartist, title, album, genre, comment;
int year, track, disc;
float rgAlbumGain, rgAlbumPeak, rgTrackGain, rgTrackPeak;
TagLib::String cuesheet;
artist = tag->artist();
albumartist = tag->albumartist();
title = tag->title();;
album = tag->album();
genre = tag->genre();
comment = tag->comment();
cuesheet = tag->cuesheet();
year = tag->year();
[dict setObject:[NSNumber numberWithInt:year] forKey:@"year"];
track = tag->track();
[dict setObject:[NSNumber numberWithInt:track] forKey:@"track"];
disc = tag->disc();
[dict setObject:[NSNumber numberWithInt:disc] forKey:@"disc"];
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.isEmpty())
[dict setObject:[NSString stringWithUTF8String:artist.toCString(true)] forKey:@"artist"];
if (!albumartist.isEmpty())
[dict setObject:[NSString stringWithUTF8String:albumartist.toCString(true)] forKey:@"albumartist"];
if (!album.isEmpty())
[dict setObject:[NSString stringWithUTF8String:album.toCString(true)] forKey:@"album"];
if (!title.isEmpty())
[dict setObject:[NSString stringWithUTF8String:title.toCString(true)] forKey:@"title"];
if (!genre.isEmpty())
[dict setObject:[NSString stringWithUTF8String:genre.toCString(true)] forKey:@"genre"];
if (!cuesheet.isEmpty())
[dict setObject:[NSString stringWithUTF8String:cuesheet.toCString(true)] forKey:@"cuesheet"];
}
// Try to load the image.
NSData * image = nil;
// Try to load the image.
// 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()];
}
}
}
// D-D-D-DOUBLE HACK!
TagLib::MP4::File *m4f = dynamic_cast<TagLib::MP4::File *>(f.file());
if (m4f) {
TagLib::MP4::Tag *tag = m4f->tag();
if (tag) {
auto covr = tag->item("covr");
if (covr.isValid()) {
auto coverArtList = covr.toCoverArtList();
if (!coverArtList.isEmpty()) {
TagLib::MP4::CoverArt coverArt = coverArtList.front();
image = [NSData dataWithBytes:coverArt.data().data() length:coverArt.data().size()];
}
}
}
}
TagLib::Ogg::Vorbis::File *vorbis = dynamic_cast<TagLib::Ogg::Vorbis::File*>(f.file());
if (vorbis) {
TagLib::Ogg::XiphComment *tag = vorbis->tag();
if (tag) {
auto list = tag->pictureList();
if (!list.isEmpty()) {
// Just get the first image for now.
TagLib::FLAC::Picture* coverArt = list.front();
if (coverArt) {
// Look into TagLib::FLAC::Picture::Type for type description.
NSLog(@"Loading image metadata from Ogg Vorbis, type = %d",
static_cast<int>(coverArt->type()));
image = [NSData dataWithBytes:coverArt->data().data()
length:coverArt->data().size()];
}
}
}
}
TagLib::FLAC::File *flac = dynamic_cast<TagLib::FLAC::File*>(f.file());
if (flac) {
auto list = flac->pictureList();
if (!list.isEmpty()) {
// Just get the first image for now.
TagLib::FLAC::Picture* coverArt = list.front();
if (coverArt) {
// Look into TagLib::FLAC::Picture::Type for type description.
NSLog(@"Loading image metadata from FLAC, type = %d",
static_cast<int>(coverArt->type()));
image = [NSData dataWithBytes:coverArt->data().data()
length:coverArt->data().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 *types = @[@"jpg", @"jpeg", @"png"];
NSArray *imageFileNames = [fileNames pathsMatchingExtensions:types];
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;
}
+ (BOOL)isCoverFile:(NSString *)fileName
{
for (NSString *coverFileName in [TagLibMetadataReader coverNames]) {
if ([[[[fileName lastPathComponent] stringByDeletingPathExtension] lowercaseString] hasSuffix:coverFileName]) {
return true;
}
}
return false;
}
+ (NSArray *)coverNames
{
return @[@"cover", @"folder", @"album", @"front"];
}
+ (NSArray *)fileTypes
{
//May be a way to get a list of supported formats
return @[@"ape", @"asf", @"wma", @"ogg", @"opus", @"mpc", @"flac", @"m4a", @"mp3", @"tak", @"ac3", @"apl", @"dts", @"dtshd", @"tta", @"wav", @"aif", @"aiff", @"wv", @"wvp"];
}
+ (NSArray *)mimeTypes
{
return @[@"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", @"audio/x-ac3", @"audio/x-apl", @"audio/x-dts", @"audio/x-dtshd", @"audio/x-tta", @"audio/wav", @"audio/aiff", @"audio/x-wavpack"];
}
+ (float)priority
{
return 1.0f;
}
@end