263 lines
8.4 KiB
Objective-C
263 lines
8.4 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/audioproperties.h>
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#import <taglib/fileref.h>
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#import <taglib/flac/flacfile.h>
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#import <taglib/mp4/mp4file.h>
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#import <taglib/mpc/mpcproperties.h>
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#import <taglib/mpeg/id3v2/frames/attachedpictureframe.h>
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#import <taglib/mpeg/id3v2/id3v2tag.h>
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#import <taglib/mpeg/mpegfile.h>
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#import <taglib/tag.h>
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#import <taglib/ogg/vorbis/vorbisfile.h>
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#import <taglib/ogg/xiphcomment.h>
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@implementation TagLibMetadataReader
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+ (NSDictionary *)metadataForURL:(NSURL *)url {
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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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// if ( !*TagLib::ascii_encoding ) {
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// NSStringEncoding enc = [NSString defaultCStringEncoding];
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// CFStringEncoding cfenc = CFStringConvertNSStringEncodingToEncoding(enc);
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// NSString *ref = (NSString *)CFStringConvertEncodingToIANACharSetName(cfenc);
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// UInt32 cp = CFStringConvertEncodingToWindowsCodepage(cfenc);
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//
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// // Most tags are using windows codepage, so remap OS X codepage to Windows one.
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//
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// static struct {
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// UInt32 from, to;
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// } codepage_remaps[] = {
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// { 10001, 932 }, // Japanese Shift-JIS
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// { 10002, 950 }, // Traditional Chinese
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// { 10003, 949 }, // Korean
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// { 10004, 1256 }, // Arabic
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// { 10005, 1255 }, // Hebrew
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// { 10006, 1253 }, // Greek
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// { 10007, 1251 }, // Cyrillic
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// { 10008, 936 }, // Simplified Chinese
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// { 10029, 1250 }, // Central European (latin2)
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// };
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//
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// int i;
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// int max = sizeof(codepage_remaps)/sizeof(codepage_remaps[0]);
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// for ( i=0; i<max; i++ )
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// if ( codepage_remaps[i].from == cp )
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// break;
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// if ( i < max )
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// sprintf(TagLib::ascii_encoding, "windows-%d", codepage_remaps[i].to);
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// else
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// strcpy(TagLib::ascii_encoding, [ref UTF8String]);
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//
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// }
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TagLib::FileRef f((const char *)[[url path] UTF8String], false);
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if(!f.isNull()) {
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const TagLib::Tag *tag = f.tag();
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if(tag) {
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TagLib::String artist, albumartist, title, album, genre, comment;
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int year, track, disc;
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float rgAlbumGain, rgAlbumPeak, rgTrackGain, rgTrackPeak;
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TagLib::String cuesheet;
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TagLib::String soundcheck;
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artist = tag->artist();
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albumartist = tag->albumartist();
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title = tag->title();
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;
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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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cuesheet = tag->cuesheet();
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year = tag->year();
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[dict setObject:@(year) forKey:@"year"];
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track = tag->track();
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[dict setObject:@(track) forKey:@"track"];
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disc = tag->disc();
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[dict setObject:@(disc) forKey:@"disc"];
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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:@(rgAlbumGain) forKey:@"replayGainAlbumGain"];
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[dict setObject:@(rgAlbumPeak) forKey:@"replayGainAlbumPeak"];
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[dict setObject:@(rgTrackGain) forKey:@"replayGainTrackGain"];
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[dict setObject:@(rgTrackPeak) forKey:@"replayGainTrackPeak"];
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soundcheck = tag->soundcheck();
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if(!soundcheck.isEmpty()) {
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TagLib::StringList tag = soundcheck.split(" ");
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TagLib::StringList wantedTag;
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for(int i = 0, count = tag.size(); i < count; i++) {
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if(tag[i].length() == 8)
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wantedTag.append(tag[i]);
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}
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if(wantedTag.size() >= 10) {
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float volume1 = -log10((double)((uint32_t)wantedTag[0].toInt(16)) / 1000) * 10;
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float volume2 = -log10((double)((uint32_t)wantedTag[1].toInt(16)) / 1000) * 10;
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float volumeToUse = MIN(volume1, volume2);
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float volumeScale = pow(10, volumeToUse / 20);
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[dict setObject:@(volumeScale) forKey:@"volume"];
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}
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}
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if(!artist.isEmpty())
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[dict setObject:[NSString stringWithUTF8String:artist.toCString(true)] forKey:@"artist"];
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if(!albumartist.isEmpty())
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[dict setObject:[NSString stringWithUTF8String:albumartist.toCString(true)] forKey:@"albumartist"];
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if(!album.isEmpty())
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[dict setObject:[NSString stringWithUTF8String:album.toCString(true)] forKey:@"album"];
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if(!title.isEmpty())
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[dict setObject:[NSString stringWithUTF8String:title.toCString(true)] forKey:@"title"];
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if(!genre.isEmpty())
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[dict setObject:[NSString stringWithUTF8String:genre.toCString(true)] forKey:@"genre"];
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if(!cuesheet.isEmpty())
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[dict setObject:[NSString stringWithUTF8String:cuesheet.toCString(true)] forKey:@"cuesheet"];
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}
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// Try to load the image.
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NSData *image = nil;
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// Try to load the image.
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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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// D-D-D-DOUBLE HACK!
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TagLib::MP4::File *m4f = dynamic_cast<TagLib::MP4::File *>(f.file());
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if(m4f) {
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TagLib::MP4::Tag *tag = m4f->tag();
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if(tag) {
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auto covr = tag->item("covr");
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if(covr.isValid()) {
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auto coverArtList = covr.toCoverArtList();
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if(!coverArtList.isEmpty()) {
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TagLib::MP4::CoverArt coverArt = coverArtList.front();
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image = [NSData dataWithBytes:coverArt.data().data() length:coverArt.data().size()];
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}
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}
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}
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}
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TagLib::Ogg::Vorbis::File *vorbis = dynamic_cast<TagLib::Ogg::Vorbis::File *>(f.file());
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if(vorbis) {
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TagLib::Ogg::XiphComment *tag = vorbis->tag();
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if(tag) {
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auto list = tag->pictureList();
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if(!list.isEmpty()) {
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// Just get the first image for now.
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TagLib::FLAC::Picture *coverArt = list.front();
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if(coverArt) {
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// Look into TagLib::FLAC::Picture::Type for type description.
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NSLog(@"Loading image metadata from Ogg Vorbis, type = %d",
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static_cast<int>(coverArt->type()));
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image = [NSData dataWithBytes:coverArt->data().data()
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length:coverArt->data().size()];
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}
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}
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}
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}
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TagLib::FLAC::File *flac = dynamic_cast<TagLib::FLAC::File *>(f.file());
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if(flac) {
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auto list = flac->pictureList();
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if(!list.isEmpty()) {
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// Just get the first image for now.
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TagLib::FLAC::Picture *coverArt = list.front();
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if(coverArt) {
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// Look into TagLib::FLAC::Picture::Type for type description.
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NSLog(@"Loading image metadata from FLAC, type = %d",
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static_cast<int>(coverArt->type()));
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image = [NSData dataWithBytes:coverArt->data().data()
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length:coverArt->data().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 *types = @[@"jpg", @"jpeg", @"png", @"gif", @"webp", @"avif"];
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NSArray *imageFileNames = [fileNames pathsMatchingExtensions:types];
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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;
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}
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+ (BOOL)isCoverFile:(NSString *)fileName {
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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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return @[@"cover", @"folder", @"album", @"front"];
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}
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+ (NSArray *)fileTypes {
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// May be a way to get a list of supported formats
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return @[@"ape", @"asf", @"wma", @"ogg", @"opus", @"mpc", @"flac", @"m4a", @"mp3", @"tak", @"ac3", @"apl", @"dts", @"dtshd", @"tta", @"wav", @"aif", @"aiff", @"wv", @"wvp"];
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}
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+ (NSArray *)mimeTypes {
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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"];
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}
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+ (float)priority {
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return 1.0f;
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}
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@end
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