bool SFB::Audio::AddID3v2TagToDictionary(CFMutableDictionaryRef dictionary, std::vector<std::shared_ptr<AttachedPicture>>& attachedPictures, const TagLib::ID3v2::Tag *tag)
{
if(nullptr == dictionary || nullptr == tag)
return false;
// Add the basic tags not specific to ID3v2
AddTagToDictionary(dictionary, tag);
// Release date
auto frameList = tag->frameListMap()["TDRC"];
if(!frameList.isEmpty()) {
/*
The timestamp fields are based on a subset of ISO 8601. When being as
precise as possible the format of a time string is
yyyy-MM-ddTHH:mm:ss (year, "-", month, "-", day, "T", hour (out of
24), ":", minutes, ":", seconds), but the precision may be reduced by
removing as many time indicators as wanted. Hence valid timestamps
are
yyyy, yyyy-MM, yyyy-MM-dd, yyyy-MM-ddTHH, yyyy-MM-ddTHH:mm and
yyyy-MM-ddTHH:mm:ss. All time stamps are UTC. For durations, use
the slash character as described in 8601, and for multiple non-
contiguous dates, use multiple strings, if allowed by the frame
definition.
*/
TagLib::AddStringToCFDictionary(dictionary, Metadata::kReleaseDateKey, frameList.front()->toString());
}
// Extract composer if present
frameList = tag->frameListMap()["TCOM"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kComposerKey, frameList.front()->toString());
// Extract album artist
frameList = tag->frameListMap()["TPE2"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kAlbumArtistKey, frameList.front()->toString());
// BPM
frameList = tag->frameListMap()["TBPM"];
if(!frameList.isEmpty()) {
bool ok = false;
int BPM = frameList.front()->toString().toInt(&ok);
if(ok)
AddIntToDictionary(dictionary, Metadata::kBPMKey, BPM);
}
// Rating
TagLib::ID3v2::PopularimeterFrame *popularimeter = nullptr;
frameList = tag->frameListMap()["POPM"];
if(!frameList.isEmpty() && nullptr != (popularimeter = dynamic_cast<TagLib::ID3v2::PopularimeterFrame *>(frameList.front())))
AddIntToDictionary(dictionary, Metadata::kRatingKey, popularimeter->rating());
// Extract total tracks if present
frameList = tag->frameListMap()["TRCK"];
if(!frameList.isEmpty()) {
// Split the tracks at '/'
TagLib::String s = frameList.front()->toString();
bool ok;
size_t pos = s.find("/", 0);
if(TagLib::String::npos() != pos) {
int trackNum = s.substr(0, pos).toInt(&ok);
if(ok)
AddIntToDictionary(dictionary, Metadata::kTrackNumberKey, trackNum);
int trackTotal = s.substr(pos + 1).toInt(&ok);
if(ok)
AddIntToDictionary(dictionary, Metadata::kTrackTotalKey, trackTotal);
}
else if(s.length()) {
int trackNum = s.toInt(&ok);
if(ok)
AddIntToDictionary(dictionary, Metadata::kTrackNumberKey, trackNum);
}
}
// Extract disc number and total discs
frameList = tag->frameListMap()["TPOS"];
if(!frameList.isEmpty()) {
// Split the tracks at '/'
TagLib::String s = frameList.front()->toString();
bool ok;
size_t pos = s.find("/", 0);
if(TagLib::String::npos() != pos) {
int discNum = s.substr(0, pos).toInt(&ok);
if(ok)
AddIntToDictionary(dictionary, Metadata::kDiscNumberKey, discNum);
int discTotal = s.substr(pos + 1).toInt(&ok);
if(ok)
AddIntToDictionary(dictionary, Metadata::kDiscTotalKey, discTotal);
}
else if(s.length()) {
int discNum = s.toInt(&ok);
if(ok)
AddIntToDictionary(dictionary, Metadata::kDiscNumberKey, discNum);
}
}
// Lyrics
frameList = tag->frameListMap()["USLT"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kLyricsKey, frameList.front()->toString());
// Extract compilation if present (iTunes TCMP tag)
frameList = tag->frameListMap()["TCMP"];
if(!frameList.isEmpty())
// It seems that the presence of this frame indicates a compilation
CFDictionarySetValue(dictionary, Metadata::kCompilationKey, kCFBooleanTrue);
frameList = tag->frameListMap()["TSRC"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kISRCKey, frameList.front()->toString());
// MusicBrainz
auto musicBrainzReleaseIDFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "MusicBrainz Album Id");
if(musicBrainzReleaseIDFrame)
TagLib::AddStringToCFDictionary(dictionary, Metadata::kMusicBrainzReleaseIDKey, musicBrainzReleaseIDFrame->fieldList().back());
auto musicBrainzRecordingIDFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "MusicBrainz Track Id");
if(musicBrainzRecordingIDFrame)
TagLib::AddStringToCFDictionary(dictionary, Metadata::kMusicBrainzRecordingIDKey, musicBrainzRecordingIDFrame->fieldList().back());
// Sorting and grouping
frameList = tag->frameListMap()["TSOT"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kTitleSortOrderKey, frameList.front()->toString());
frameList = tag->frameListMap()["TSOA"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kAlbumTitleSortOrderKey, frameList.front()->toString());
frameList = tag->frameListMap()["TSOP"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kArtistSortOrderKey, frameList.front()->toString());
frameList = tag->frameListMap()["TSO2"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kAlbumArtistSortOrderKey, frameList.front()->toString());
frameList = tag->frameListMap()["TSOC"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kComposerSortOrderKey, frameList.front()->toString());
frameList = tag->frameListMap()["TIT1"];
if(!frameList.isEmpty())
TagLib::AddStringToCFDictionary(dictionary, Metadata::kGroupingKey, frameList.front()->toString());
// ReplayGain
bool foundReplayGain = false;
// Preference is TXXX frames, RVA2 frame, then LAME header
auto trackGainFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "REPLAYGAIN_TRACK_GAIN");
auto trackPeakFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "REPLAYGAIN_TRACK_PEAK");
auto albumGainFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "REPLAYGAIN_ALBUM_GAIN");
auto albumPeakFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "REPLAYGAIN_ALBUM_PEAK");
if(!trackGainFrame)
trackGainFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "replaygain_track_gain");
if(trackGainFrame) {
SFB::CFString str(trackGainFrame->fieldList().back().toCString(true), kCFStringEncodingUTF8);
double num = CFStringGetDoubleValue(str);
AddDoubleToDictionary(dictionary, Metadata::kTrackGainKey, num);
AddDoubleToDictionary(dictionary, Metadata::kReferenceLoudnessKey, 89.0);
foundReplayGain = true;
}
if(!trackPeakFrame)
trackPeakFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "replaygain_track_peak");
if(trackPeakFrame) {
SFB::CFString str(trackPeakFrame->fieldList().back().toCString(true), kCFStringEncodingUTF8);
double num = CFStringGetDoubleValue(str);
AddDoubleToDictionary(dictionary, Metadata::kTrackPeakKey, num);
}
if(!albumGainFrame)
albumGainFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "replaygain_album_gain");
if(albumGainFrame) {
SFB::CFString str(albumGainFrame->fieldList().back().toCString(true), kCFStringEncodingUTF8);
double num = CFStringGetDoubleValue(str);
AddDoubleToDictionary(dictionary, Metadata::kAlbumGainKey, num);
AddDoubleToDictionary(dictionary, Metadata::kReferenceLoudnessKey, 89.0);
foundReplayGain = true;
}
if(!albumPeakFrame)
albumPeakFrame = TagLib::ID3v2::UserTextIdentificationFrame::find(const_cast<TagLib::ID3v2::Tag *>(tag), "replaygain_album_peak");
if(albumPeakFrame) {
SFB::CFString str(albumPeakFrame->fieldList().back().toCString(true), kCFStringEncodingUTF8);
double num = CFStringGetDoubleValue(str);
AddDoubleToDictionary(dictionary, Metadata::kAlbumPeakKey, num);
}
// If nothing found check for RVA2 frame
if(!foundReplayGain) {
frameList = tag->frameListMap()["RVA2"];
for(auto frameIterator : tag->frameListMap()["RVA2"]) {
TagLib::ID3v2::RelativeVolumeFrame *relativeVolume = dynamic_cast<TagLib::ID3v2::RelativeVolumeFrame *>(frameIterator);
if(!relativeVolume)
continue;
// Attempt to use the master volume if present
auto channels = relativeVolume->channels();
auto channelType = TagLib::ID3v2::RelativeVolumeFrame::MasterVolume;
// Fall back on whatever else exists in the frame
if(!channels.contains(TagLib::ID3v2::RelativeVolumeFrame::MasterVolume))
channelType = channels.front();
float volumeAdjustment = relativeVolume->volumeAdjustment(channelType);
if(TagLib::String("track", TagLib::String::Latin1) == relativeVolume->identification()) {
if((int)volumeAdjustment)
AddFloatToDictionary(dictionary, Metadata::kTrackGainKey, volumeAdjustment);
}
else if(TagLib::String("album", TagLib::String::Latin1) == relativeVolume->identification()) {
if((int)volumeAdjustment)
AddFloatToDictionary(dictionary, Metadata::kAlbumGainKey, volumeAdjustment);
}
// Fall back to track gain if identification is not specified
else {
if((int)volumeAdjustment)
AddFloatToDictionary(dictionary, Metadata::kTrackGainKey, volumeAdjustment);
}
}
}
// Extract album art if present
for(auto it : tag->frameListMap()["APIC"]) {
TagLib::ID3v2::AttachedPictureFrame *frame = dynamic_cast<TagLib::ID3v2::AttachedPictureFrame *>(it);
if(frame) {
SFB::CFData data((const UInt8 *)frame->picture().data(), (CFIndex)frame->picture().size());
SFB::CFString description;
if(!frame->description().isEmpty())
description = CFString(frame->description().toCString(true), kCFStringEncodingUTF8);
attachedPictures.push_back(std::make_shared<AttachedPicture>(data, (AttachedPicture::Type)frame->type(), description));
}
}
return true;
}
Meta::FieldHash
ID3v2TagHelper::tags() const
{
Meta::FieldHash data = TagHelper::tags();
TagLib::ID3v2::FrameList list = m_tag->frameList();
for( TagLib::ID3v2::FrameList::ConstIterator it = list.begin(); it != list.end(); ++it )
{
qint64 field;
TagLib::String frameName = TagLib::String( ( *it )->frameID() );
if( ( field = fieldName( frameName ) ) )
{
if( field == Meta::valUniqueId )
{
TagLib::ID3v2::UniqueFileIdentifierFrame *frame =
dynamic_cast< TagLib::ID3v2::UniqueFileIdentifierFrame * >( *it );
if( !frame )
continue;
QString identifier = TStringToQString( TagLib::String( frame->identifier() ) );
if( identifier.isEmpty() )
continue;
if( frame->owner() == uidFieldName( UIDAFT ) && isValidUID( identifier, UIDAFT ) )
data.insert( Meta::valUniqueId, identifier );
continue;
}
else if( field == Meta::valHasCover )
{
TagLib::ID3v2::AttachedPictureFrame *frame =
dynamic_cast< TagLib::ID3v2::AttachedPictureFrame * >( *it );
if( !frame )
continue;
if( ( frame->type() == TagLib::ID3v2::AttachedPictureFrame::FrontCover ||
frame->type() == TagLib::ID3v2::AttachedPictureFrame::Other ) &&
frame->picture().size() > MIN_COVER_SIZE ) // must be at least 1kb
{
data.insert( Meta::valHasCover, true );
}
continue;
}
TagLib::ID3v2::TextIdentificationFrame *frame =
dynamic_cast< TagLib::ID3v2::TextIdentificationFrame * >( *it );
if( !frame )
continue;
QString value = TStringToQString( frame->fieldList().toString( '\n' ) );
if( field == Meta::valDiscNr )
{
int disc;
if( ( disc = splitDiscNr( value ).first ) )
data.insert( field, disc );
}
else if( field == Meta::valBpm )
data.insert( field, value.toFloat() );
else
data.insert( field, value );
}
else if( frameName == POPM_Frame )
{
TagLib::ID3v2::PopularimeterFrame *frame =
dynamic_cast< TagLib::ID3v2::PopularimeterFrame * >( *it );
if( !frame )
continue;
if( TStringToQString( frame->email() ).isEmpty() ) // only read anonymous ratings
{
// FMPS tags have precedence
if( !data.contains( Meta::valRating ) && frame->rating() != 0 )
data.insert( Meta::valRating, qRound( frame->rating() / 256.0 * 10.0 ) );
if( !data.contains( Meta::valPlaycount ) && frame->counter() < 10000 )
data.insert( Meta::valPlaycount, frame->counter() );
}
}
else if( frameName == TXXX_Frame )
{
TagLib::ID3v2::UserTextIdentificationFrame *frame =
dynamic_cast< TagLib::ID3v2::UserTextIdentificationFrame * >( *it );
if( !frame )
continue;
// the value of the user text frame is stored in the
// second and following fields.
TagLib::StringList fields = frame->fieldList();
if( fields.size() >= 2 )
{
QString value = TStringToQString( fields[1] );
if( fields[0] == fmpsFieldName( FMPSRating ) )
data.insert( Meta::valRating, qRound( value.toFloat() * 10.0 ) );
else if( fields[0] == fmpsFieldName( FMPSScore ) )
data.insert( Meta::valScore, value.toFloat() * 100.0 );
else if( fields[0] == fmpsFieldName( FMPSPlayCount ) )
data.insert( Meta::valPlaycount, value.toFloat() );
}
}
}
return data;
}