C++ Tag::comment方法代码示例

bool MetaData(const char* filepath, cFields& fields, cRow& props)
{
#define ADD(x, t) do { if (t) { fields.push_back(x); props.push_back(t); } } while(0)
#define ADDSTRING(x, t) do { if (!t.empty()) { fields.push_back(x); props.push_back(t); } } while(0)
#define ADDINT(x, t) do { std::string c = *itoa(t); if (!c.empty()){ fields.push_back(x); props.push_back(c);} } while(0)
    
    TagLib::FileRef f(filepath);

    fields.clear();
    props.clear();

    //cTag t;
    //const char* tmp = NULL;
    std::string tmp;
    
    if (f.isNull()) 
    {
        std::cerr<< "Taglib failed on " << filepath << std::endl;
        ADD("metadata_needs_update", "2"); // failure
        return false;
    }
   
    TagLib::Tag *tag = f.tag();
    
    if (tag) 
    {
#if 0
      tmp   = toString(tag->title()).c_str();   ADD("title",   tmp);
      tmp   = toString(tag->artist()).c_str();  ADD("artist",  tmp);
      tmp   = toString(tag->album()).c_str();   ADD("album",   tmp);
      tmp   = toString(tag->comment()).c_str(); ADD("comment", tmp);
      tmp   = toString(tag->genre()).c_str();   ADD("genre",   tmp);
#else
        tmp   = toString(tag->title());   ADDSTRING("title",   tmp);
        tmp   = toString(tag->artist());  ADDSTRING("artist",  tmp);
        tmp   = toString(tag->album());   ADDSTRING("album",   tmp);
        tmp   = toString(tag->comment()); ADDSTRING("comment", tmp);
        tmp   = toString(tag->genre());   ADDSTRING("genre",   tmp);
#endif
      
      //ADDINT("track", tag->track());
      ADDINT("year",  tag->year());
    }
    
    TagLib::AudioProperties *prop = f.audioProperties();
    if (prop) 
    {
        ADDINT("bitrate",    prop->bitrate());
        ADDINT("samplerate", prop->sampleRate());
      //  ADDINT("channels",   prop->channels());
        ADDINT("length" ,    prop->length());
    }
 
    ADD("metadata_needs_update", "0");
    return true;
}

void Track::readTags()
{
    QByteArray fileName = QFile::encodeName( p->url.toLocalFile() );
    const char * encodedName = fileName.constData();
    TagLib::FileRef fileref = TagLib::FileRef( encodedName, true, TagLib::AudioProperties::Fast);

   if ( !fileref.isNull() )
   {
        if( fileref.tag() )
        {
            TagLib::Tag *tag = fileref.tag();

            p->title   = !tag->title().isNull() ? TStringToQString( tag->title() ).trimmed() : QObject::tr("Unknown");
            p->artist  = !tag->artist().isNull() ? TStringToQString( tag->artist() ).trimmed() : QObject::tr("Unknown");
            p->album   = !tag->album().isNull() ? TStringToQString( tag->album() ).trimmed() : QObject::tr("Unknown");
            p->comment = TStringToQString( tag->comment() ).trimmed();
            p->genre   = !tag->genre().isNull() ? TStringToQString( tag->genre() ).trimmed() : QObject::tr("Unknown");
            p->year    = tag->year() ? QString::number( tag->year() ) : QString::null;
            p->tracknumber   = tag->track() ? QString::number( tag->track() ) : QString::null;
            p->length     = fileref.audioProperties()->length();
            p->counter = 0;
            p->rate = 0;

            //polish up empty tags
            if( p->title == QObject::tr("Unknown") ) {
                QFileInfo fileInfo(p->url.toLocalFile());
                p->title = fileInfo.fileName().replace( '_', ' ' ).replace('.' + fileInfo.suffix(),"") ;
            }
        }
    }

}

void getMp3Info(const WCHAR* fileName, MP3Info &info)
{
    TagLib::FileRef f(fileName);

    if (!f.isNull() && f.tag())
    {
        TagLib::Tag *tag = f.tag();

        info.tag[0] = tag->title().toWString();
        info.tag[1] = tag->artist().toWString();
        info.tag[2] = tag->album().toWString();
        info.tag[3] = tag->comment().toWString();
        info.tag[4] = tag->genre().toWString();
        info.year = tag->year();
        info.track = tag->track();

        TagLib::PropertyMap tags = f.file()->properties();

        if (!f.isNull() && f.audioProperties()) 
        {
            TagLib::AudioProperties *properties = f.audioProperties();

            int seconds = properties->length() % 60;
            int minutes = (properties->length() - seconds) / 60;

            info.bitrate = properties->bitrate();
            info.sample_rate = properties->sampleRate();
            info.channels = properties->channels();
            info.length_minutes = minutes;
            info.length_seconds = seconds;
        }
    }
}

TagLibTokenizer::TagLibTokenizer(const Document *pDocument) :
	Tokenizer(NULL),
	m_pTagDocument(NULL)
{
	if (pDocument != NULL)
	{
		Url urlObj(pDocument->getLocation());
		string pseudoContent;

		if ((urlObj.isLocal() == true) &&
			(urlObj.getFile().empty() == false))
		{
			string location(urlObj.getLocation());
			string trackTitle;

			location += "/";
			location += urlObj.getFile();

			TagLib::FileRef fileRef(location.c_str(), false);
			if (fileRef.isNull() == false)
			{
				TagLib::Tag *pTag = fileRef.tag();
				if ((pTag != NULL) &&
					(pTag->isEmpty() == false))
				{
					char yearStr[64];

					trackTitle = pTag->title().to8Bit(); 
					trackTitle += " ";
					trackTitle += pTag->artist().to8Bit();

					pseudoContent = trackTitle;
					pseudoContent += " ";
					pseudoContent += pTag->album().to8Bit();
					pseudoContent += " ";
					pseudoContent += pTag->comment().to8Bit();
					pseudoContent += " ";
					pseudoContent += pTag->genre().to8Bit();
					snprintf(yearStr, 64, " %u", pTag->year());
					pseudoContent += yearStr;
				}
			}
			else
			{
				trackTitle = pseudoContent = pDocument->getTitle();
			}

			m_pTagDocument = new Document(trackTitle, pDocument->getLocation(),
				pDocument->getType(), pDocument->getLanguage());
			m_pTagDocument->setData(pseudoContent.c_str(), pseudoContent.length());
			m_pTagDocument->setTimestamp(pDocument->getTimestamp());
			m_pTagDocument->setSize(pDocument->getSize());

			// Give the result to the parent class
			setDocument(m_pTagDocument);
		}
	}
}

int handle_file(const char* filepath, const char* filekey, AudioFileRecordStore& record_store)
{
    bool record_exists = record_store.find_record(filekey) != NULL;

    // Scanning a file for tags is expensive, so only do it if required.
    if(record_exists
            && !record_store.record_update_required(filekey))
    {
        // no update reqquired so has been handled.
        return 1;
    }

    TagLib::FileRef f(filepath);
    if (!f.isNull() && f.tag())
    {
        AudioFileRecord &record = record_store.get_record(filekey);
        record.update_start();

        if (verbose)
        {
            TagLib::Tag *tag = f.tag();
            std::cout << filepath << endl;
            std::cout << filekey << endl;
            std::cout << "-- TAG (basic) --" << endl;
            std::cout << "title   - \"" << tag->title()   << "\"" << endl;
            std::cout << "artist  - \"" << tag->artist()  << "\"" << endl;
            std::cout << "album   - \"" << tag->album()   << "\"" << endl;
            std::cout << "year    - \"" << tag->year()    << "\"" << endl;
            std::cout << "comment - \"" << tag->comment() << "\"" << endl;
            std::cout << "track   - \"" << tag->track()   << "\"" << endl;
            std::cout << "genre   - \"" << tag->genre()   << "\"" << endl;
        }

        TagLib::PropertyMap tags = f.file()->properties();

        for(TagLib::PropertyMap::ConstIterator i = tags.begin(); i != tags.end(); ++i)
        {
            for(TagLib::StringList::ConstIterator j = i->second.begin(); j != i->second.end(); ++j) 
            {
                record.update(i->first.toCString(true), j->toCString(true));
            }
        }

        if (f.audioProperties())
        {
            TagLib::AudioProperties *properties = f.audioProperties();
            record.update(audio_tags::BITRATE, properties->bitrate());
            record.update(audio_tags::LENGTH, properties->length());
            record.update(audio_tags::SAMPLERATE, properties->sampleRate());
            record.update(audio_tags::CHANNELS, properties->channels());
        }

        record.update_complete();
        return 1;
    }

    return 0;
}

bool ReadTag(const musik::Core::String& fn, musik::Core::SongInfo& target)
{
    bool ret = true;

    musik::Core::Filename mfn(fn);

    target.SetFilename(fn);
    target.SetFormat("Ogg Vorbis");

    try
    {
#if defined (WIN32)
        TagLib::FileRef tag_file(fn.c_str());
#else    
        TagLib::FileRef tag_file(utf16to8(fn, true).c_str());
#endif
        if (!tag_file.isNull())
        {
            if (tag_file.tag())
            {
                TagLib::Tag *tag = tag_file.tag();        

                target.SetArtist(musik::Core::utf8to16(tag->artist().to8Bit(true)));
                target.SetAlbum(musik::Core::utf8to16(tag->album().to8Bit(true)));
                target.SetTitle(musik::Core::utf8to16(tag->title().to8Bit(true)));
                target.SetGenre(musik::Core::utf8to16(tag->genre().to8Bit(true)));
                target.SetNotes(musik::Core::utf8to16(tag->comment().to8Bit(true)));

                target.SetYear(musik::Core::IntToString(tag->year()));
                target.SetTrackNum(musik::Core::IntToString(tag->track()));
            }

            if (tag_file.audioProperties())
            {
                TagLib::AudioProperties *properties = tag_file.audioProperties();
                int duration = properties->length() * 1000;
                target.SetBitrate(musik::Core::IntToString(properties->bitrate()));
                target.SetDuration(musik::Core::IntToString(duration));
            }
        }

        // if the title is empty, then use the
        // filename...
        if (target.GetTitle().IsEmpty())
        {
            musik::Core::Filename MFN(fn);
            target.SetTitle(MFN.GetJustFilename());
        }
    }
    catch (...)
    {
        ret = false;
        cout << "taglib crashed reading: " << fn.c_str() << endl;
    }

    return ret;
}

int main(int argc, char *argv[])
{
  for(int i = 1; i < argc; i++) {

    cout << "******************** \"" << argv[i] << "\" ********************" << endl;

    TagLib::FileRef f(argv[i]);

    if(!f.isNull() && f.tag()) {

      TagLib::Tag *tag = f.tag();

      cout << "-- TAG (basic) --" << endl;
      cout << "title   - \"" << tag->title()   << "\"" << endl;
      cout << "artist  - \"" << tag->artist()  << "\"" << endl;
      cout << "album   - \"" << tag->album()   << "\"" << endl;
      cout << "year    - \"" << tag->year()    << "\"" << endl;
      cout << "comment - \"" << tag->comment() << "\"" << endl;
      cout << "track   - \"" << tag->track()   << "\"" << endl;
      cout << "genre   - \"" << tag->genre()   << "\"" << endl;

      TagLib::PropertyMap tags = f.file()->properties();

      unsigned int longest = 0;
      for(TagLib::PropertyMap::ConstIterator i = tags.begin(); i != tags.end(); ++i) {
        if (i->first.size() > longest) {
          longest = i->first.size();
        }
      }

      cout << "-- TAG (properties) --" << endl;
      for(TagLib::PropertyMap::ConstIterator i = tags.begin(); i != tags.end(); ++i) {
        for(TagLib::StringList::ConstIterator j = i->second.begin(); j != i->second.end(); ++j) {
          cout << left << std::setw(longest) << i->first << " - " << '"' << *j << '"' << endl;
        }
      }

    }

    if(!f.isNull() && f.audioProperties()) {

      TagLib::AudioProperties *properties = f.audioProperties();

      int seconds = properties->length() % 60;
      int minutes = (properties->length() - seconds) / 60;

      cout << "-- AUDIO --" << endl;
      cout << "bitrate     - " << properties->bitrate() << endl;
      cout << "sample rate - " << properties->sampleRate() << endl;
      cout << "channels    - " << properties->channels() << endl;
      cout << "length      - " << minutes << ":" << setfill('0') << setw(2) << seconds << endl;
    }
  }
  return 0;
}

int main(int argc, char *argv[])
{
    for(int i = 1; i < argc; i++) {

        cout << "******************** \"" << argv[i] << "\" ********************" << endl;

        TagLib::FileRef f(argv[i]);

        if(!f.isNull() && f.tag()) {

            TagLib::Tag *tag = f.tag();

            cout << "-- TAG --" << endl;
            cout << "title   - \"" << tag->title()   << "\"" << endl;
            cout << "artist  - \"" << tag->artist()  << "\"" << endl;
            cout << "album   - \"" << tag->album()   << "\"" << endl;
            cout << "year    - \"" << tag->year()    << "\"" << endl;
            cout << "comment - \"" << tag->comment() << "\"" << endl;
            cout << "track   - \"" << tag->track()   << "\"" << endl;
            cout << "genre   - \"" << tag->genre()   << "\"" << endl;
        }

        if(!f.isNull() && f.audioProperties()) {

            TagLib::AudioProperties *properties = f.audioProperties();

            int seconds = properties->length() % 60;
            int minutes = (properties->length() - seconds) / 60;

            cout << "-- AUDIO --" << endl;
            cout << "bitrate     - " << properties->bitrate() << endl;
            cout << "sample rate - " << properties->sampleRate() << endl;
            cout << "channels    - " << properties->channels() << endl;
            cout << "length      - " << minutes << ":" << formatSeconds(seconds) << endl;
        }
    }
    return 0;
}

QString NTagReaderTaglib::parse(const QString &format, bool *success, bool stopOnFail)
{
	if (format.isEmpty())
		return "";

	*success = true;

	if (!isValid())
		return "NTagReaderTaglib::InvalidFile";

	TagLib::Tag *tag = NTaglib::_tagRef->tag();
	TagLib::AudioProperties *ap = NTaglib::_tagRef->audioProperties();

	int seconds_total = ap->length();

	QString res;
	for (int i = 0; i < format.size(); ++i) {
		if (format.at(i) == '%') {
			++i;
			QChar ch = format.at(i);
			if (ch == 'a') {
				QString str = TStringToQString(tag->artist());
				if (!(*success = !str.isEmpty()))
					str = "<Unknown artist>";
				res += str;
			} else if (ch == 't') {
				QString str = TStringToQString(tag->title());
				if (!(*success = !str.isEmpty()))
					str = "<Unknown title>";
				res += str;
			} else if (ch == 'A') {
				QString str = TStringToQString(tag->album());
				if (!(*success = !str.isEmpty()))
					str = "<Unknown album>";
				res += str;
			} else if (ch == 'c') {
				QString str = TStringToQString(tag->comment());
				if (!(*success = !str.isEmpty()))
					str = "<Empty comment>";
				res += str;
			} else if (ch == 'g') {
				QString str = TStringToQString(tag->genre());
				if (!(*success = !str.isEmpty()))
					str = "<Unknown genre>";
				res += str;
			} else if (ch == 'y') {
				QString str = QString::number(tag->year());
				if (str == "0") {
					str = "<Unknown year>";
					*success = false;
				}
				res += str;
			} else if (ch == 'n') {
				QString str = QString::number(tag->track());
				if (str == "0") {
					str = "<Unknown track number>";
					*success = false;
				}
				res += str;
			} else if (ch == 'b') {
				if (auto *prop = dynamic_cast<TagLib::APE::Properties *>(ap)) {
					res += QString::number(prop->bitsPerSample());
				}
				else
				if (auto *prop = dynamic_cast<TagLib::FLAC::Properties *>(ap)) {
					res += QString::number(prop->sampleWidth());
				}
				else
				if (auto *prop = dynamic_cast<TagLib::MP4::Properties *>(ap)) {
					res += QString::number(prop->bitsPerSample());
				}
				else
				if (auto *prop = dynamic_cast<TagLib::RIFF::AIFF::Properties *>(ap)) {
					res += QString::number(prop->sampleWidth());
				}
				else
				if (auto *prop = dynamic_cast<TagLib::RIFF::WAV::Properties *>(ap)) {
					res += QString::number(prop->sampleWidth());
				}
				else
				if (auto *prop = dynamic_cast<TagLib::TrueAudio::Properties *>(ap)) {
					res += QString::number(prop->bitsPerSample());
				}
				else
				if (auto *prop = dynamic_cast<TagLib::WavPack::Properties *>(ap)) {
					res += QString::number(prop->bitsPerSample());
				}
				else {
					res += "<Unknown bit depth>";
					*success = false;
				}
			} else if (ch == 'd') {
				QString duration;
				if (seconds_total > 0) {
					int seconds = seconds_total % 60;
					int minutes = (seconds_total - seconds) / 60;
					int hours = minutes / 60;
					minutes = minutes % 60;
					if (hours > 0)
						duration.sprintf("%d:%02d:%02d", hours, minutes, seconds);
//.........这里部分代码省略.........

bool SoundSource::processTaglibFile(TagLib::File& f) {
    if (s_bDebugMetadata)
        qDebug() << "Parsing" << getFilename();

    if (f.isValid()) {
        TagLib::Tag *tag = f.tag();
        if (tag) {
            QString title = TStringToQString(tag->title());
            setTitle(title);

            QString artist = TStringToQString(tag->artist());
            setArtist(artist);

            QString album = TStringToQString(tag->album());
            setAlbum(album);

            QString comment = TStringToQString(tag->comment());
            setComment(comment);

            QString genre = TStringToQString(tag->genre());
            setGenre(genre);

            int iYear = tag->year();
            QString year = "";
            if (iYear > 0) {
                year = QString("%1").arg(iYear);
                setYear(year);
            }

            int iTrack = tag->track();
            QString trackNumber = "";
            if (iTrack > 0) {
                trackNumber = QString("%1").arg(iTrack);
                setTrackNumber(trackNumber);
            }

            if (s_bDebugMetadata)
                qDebug() << "TagLib" << "title" << title << "artist" << artist << "album" << album << "comment" << comment << "genre" << genre << "year" << year << "trackNumber" << trackNumber;
        }

        TagLib::AudioProperties *properties = f.audioProperties();
        if (properties) {
            int lengthSeconds = properties->length();
            int bitrate = properties->bitrate();
            int sampleRate = properties->sampleRate();
            int channels = properties->channels();

            if (s_bDebugMetadata)
                qDebug() << "TagLib" << "length" << lengthSeconds << "bitrate" << bitrate << "sampleRate" << sampleRate << "channels" << channels;

            setDuration(lengthSeconds);
            setBitrate(bitrate);
            setSampleRate(sampleRate);
            setChannels(channels);
        }

        // If we didn't get any audio properties, this was a failure.
        return (properties!=NULL);
    }
    return false;
}

std::vector<std::string> GetFileInfo(std::string path)
{
	std::vector<std::string> fileInfo;
	std::string title, artist, album, genre, comment;

	TagLib::FileRef f( path.c_str() );
	if(!f.isNull() && f.tag())
	{
		TagLib::Tag *tag = f.tag();
								 // unicode = false
		title   = tag->title().stripWhiteSpace().toCString(false)  ;
		if(title.size())
		{
			std::stringstream temp;
			temp << tr("Title") << ":\t";
			temp << title;
			fileInfo.push_back(temp.str());
		}

		artist  = tag->artist().stripWhiteSpace().toCString(false) ;
		if(artist.size())
		{
			std::stringstream temp;
			temp << tr("Artist") << ":\t";
			temp << artist;
			fileInfo.push_back(temp.str());
		}

		album   = tag->album().stripWhiteSpace().toCString(false)  ;
		if(album.size())
		{
			std::stringstream temp;
			temp << tr("Album") << ":\t";
			temp << album;
			fileInfo.push_back(temp.str());
		}

		genre   = tag->genre().stripWhiteSpace().toCString(false)  ;
		if(genre.size())
		{
			std::stringstream temp;
			temp << tr("Genre") << ":\t";
			temp << genre;
			fileInfo.push_back(temp.str());
		}

		comment   = tag->comment().stripWhiteSpace().toCString(false)  ;
		if(comment.size())
		{
			std::stringstream temp;
			temp << tr("Comment") << ":\t";
			temp << comment;
			fileInfo.push_back(temp.str());
		}

		if(tag->year())
		{
			std::stringstream temp;
			temp << tr("Year") << ":\t";
			temp << tag->year();
			fileInfo.push_back(temp.str());
		}

		if(tag->track())
		{
			std::stringstream temp;
			temp << tr("Track") << ":\t";
			temp << tag->track();
			fileInfo.push_back(temp.str());
		}
	}

	if(!f.isNull() && f.audioProperties())
	{
		TagLib::AudioProperties *props = f.audioProperties();
		if(props->length())
		{
			int min = props->length()/60;
			int sec = props->length()%60;
			std::stringstream temp;
			temp << tr("Length") << ":\t";
			temp << min << ":";
			if(sec<=9)
				temp << "0";
			temp << sec << " " << tr("min");
			fileInfo.push_back(temp.str());
		}

		if(props->bitrate())
		{
			std::stringstream temp;
			temp << tr("Bitrate") << ":\t";
			temp << props->bitrate() << " kb/s";
			fileInfo.push_back(temp.str());
		}

		if(props->sampleRate())
		{
			std::stringstream temp;
			temp << tr("Samplerate") << ":\t";
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            }

            // Genre.
            itOgg = lstOgg.find("GENRE");
            if (itOgg != lstOgg.end()) {
                genres.append((*itOgg).second);
            }
        }
    }

    // Handling multiple tags in Musepack files.
    if (mimeType == QLatin1String("audio/x-musepack")) {
        TagLib::MPC::File mpcFile(fileUrl.toUtf8().constData(), true);
        if (mpcFile.tag() && !mpcFile.tag()->isEmpty()) {
            TagLib::APE::ItemListMap lstMusepack = mpcFile.APETag()->itemListMap();
            TagLib::APE::ItemListMap::ConstIterator itMPC;

            // Artist.
            itMPC = lstMusepack.find("ARTIST");
            if (itMPC != lstMusepack.end()) {
                if (!artists.isEmpty()) {
                    artists += ", ";
                }
                artists += (*itMPC).second.toString();
            }

            // Album Artist.
            itMPC = lstMusepack.find("ALBUMARTIST");
            if (itMPC != lstMusepack.end()) {
                if(!albumArtists.isEmpty()) {
                    albumArtists += ", ";
                }
                albumArtists += (*itMPC).second.toString();
            }

            // Composer.
            itMPC = lstMusepack.find("COMPOSER");
            if (itMPC != lstMusepack.end()) {
                if (!composers.isEmpty()) {
                    composers += ", ";
                }
                composers += (*itMPC).second.toString();
            }

            // Lyricist.
            itMPC = lstMusepack.find("LYRICIST");
            if (itMPC != lstMusepack.end()) {
                if (!lyricists.isEmpty()) {
                    lyricists += ", ";
                }
                lyricists += (*itMPC).second.toString();
            }

            // Genre.
            itMPC = lstMusepack.find("GENRE");
            if (itMPC != lstMusepack.end()) {
                genres.append((*itMPC).second.toString());
            }
        }
    }

    if (!tags->isEmpty()) {
        QString title = t2q(tags->title());
        if (!title.isEmpty()) {
            result->add(Property::Title, title);
        }

        QString comment = t2q(tags->comment());
        if (!comment.isEmpty()) {
            result->add(Property::Comment, comment);
        }

        if (genres.isEmpty()) {
            genres.append(tags->genre());
        }

        for (uint i = 0; i < genres.size(); i++) {
            QString genre = t2q(genres[i]).trimmed();

            // Convert from int
            bool ok = false;
            int genreNum = genre.toInt(&ok);
            if (ok) {
                genre = t2q(TagLib::ID3v1::genre(genreNum));
            }

            result->add(Property::Genre, genre);
        }

        QString artistString;
        if (artists.isEmpty()) {
            artistString = t2q(tags->artist());
        } else {
            artistString = t2q(artists).trimmed();
        }

        QStringList artists = contactsFromString(artistString);
        foreach(const QString& artist, artists) {
            result->add(Property::Artist, artist);
        }

int main(int argc, char *argv[])
{
  for(int i = 1; i < argc; i++) {

    cout << "******************** \"" << argv[i] << "\" ********************" << endl;

    TagLib::FileRef f(argv[i]);

    if(!f.isNull() && f.tag()) {

      TagLib::Tag *tag = f.tag();

      cout << "-- TAG --" << endl;
      cout << "title        - \"" << tag->title()   << "\"" << endl;
      cout << "artist       - \"" << tag->artist()  << "\"" << endl;
      cout << "album artist - \"" << tag->albumArtist()   << "\"" << endl;
      cout << "album        - \"" << tag->album()   << "\"" << endl;
      cout << "year         - \"" << tag->year()    << "\"" << endl;
      cout << "comment      - \"" << tag->comment() << "\"" << endl;
      cout << "track        - \"" << tag->track()   << "\"" << endl;
      cout << "genre        - \"" << tag->genre()   << "\"" << endl;
      cout << "grouping     - \"" << tag->grouping()   << "\"" << endl;
      TagLib::Ogg::XiphComment *comment = NULL;
      TagLib::FLAC::File *flac = dynamic_cast<TagLib::FLAC::File *>(f.file());
      if (flac) {
        cout << "flac:" << endl;
        cout << "id3v1   - \"" << flac->ID3v1Tag()   << "\"" << endl;
        cout << "id3v2   - \"" << flac->ID3v2Tag()   << "\"" << endl;
        cout << "xiph    - \"" << flac->xiphComment()   << "\"" << endl;
        comment = flac->xiphComment();
      }
      if (!comment) {
        comment = dynamic_cast<TagLib::Ogg::XiphComment *>(tag);
      }
      if (comment) {
        TagLib::Ogg::FieldListMap fields = comment->fieldListMap();
        for(TagLib::Ogg::FieldListMap::ConstIterator it = fields.begin(), end = fields.end(); it != end; it++) {
          if (!it->second.isEmpty())
            cout << "xiph:" << it->first << " \"" << it->second[0].substr(0,3) << "\"" << endl;
        }
      }
      cout << "pictures- \"" << f.file()->pictures().size()   << "\"" << endl;
      TagLib::File::PictureList l = f.file()->pictures();
      for (TagLib::File::_PictureList::ConstIterator i = l.begin(), end = l.end(); i != end; i++) {
        cout << "\t" << (*i)->typeName() << ' ' << (*i)->mimeType() << ' ' << (*i)->base64data().size() << endl;
      }
      
      cout << "pictures- \"" << tag->pictures().size()   << "\"" << endl;
    }

    if(!f.isNull() && f.audioProperties()) {

      TagLib::AudioProperties *properties = f.audioProperties();

      int seconds = properties->length() % 60;
      int minutes = (properties->length() - seconds) / 60;

      cout << "-- AUDIO --" << endl;
      cout << "bitrate     - " << properties->bitrate() << endl;
      cout << "sample rate - " << properties->sampleRate() << endl;
      cout << "channels    - " << properties->channels() << endl;
      cout << "length      - " << minutes << ":" << formatSeconds(seconds) << endl;
    }
  }
  return 0;
}

Tags *TagUtils::load(const QString &filename) {
#ifdef Q_OS_WIN
    const wchar_t * encodedName = reinterpret_cast<const wchar_t*>(filename.utf16());
    TagLib::FileStream readOnlyStream(encodedName, true);
#else
    TagLib::FileStream readOnlyStream((TagLib::FileName)filename.toUtf8(), true);
#endif

    TagLib::FileRef fileref(&readOnlyStream);
    if (fileref.isNull()) {
        qDebug() << "Taglib cannot parse" << filename;
        return nullptr;
    }

    Tags *tags = new Tags();
    tags->setFilename(filename);

    TagLib::Tag *tag = fileref.tag();
    if (tag) {
        tags->setTitle(TagUtils::qString(tag->title()));
        tags->setArtistString(TagUtils::qString(tag->artist()));
        tags->setAlbumString(TagUtils::qString(tag->album()));
        tags->setGenre(TagUtils::qString(tag->genre()));
        tags->setTrackNumber(tag->track());
        tags->setYear(tag->year());
        tags->setComment(TagUtils::qString(tag->comment()));
        TagLib::AudioProperties *audioProperties = fileref.audioProperties();
        if (audioProperties)
            tags->setDuration(audioProperties->length());
    }

    /*
    TagLib::PropertyMap map = tag->properties();
    for (TagLib::PropertyMap::ConstIterator i = map.begin(); i != map.end(); ++i) {
        for (TagLib::StringList::ConstIterator j = i->second.begin(); j != i->second.end(); ++j) {
            const QString tagName = TagLibUtils::toQString(i->first);
            qDebug() << "PropertyMap" << tagName << TagLibUtils::toQString(*j);
            if (tagName == QLatin1String("ALBUMARTIST"))
                tags->setAlbumArtist(TagLibUtils::toQString(*j));
            else if (tagName == QLatin1String("DISCNUMBER"))
                tags->setDiskNumber(TagLibUtils::toQString(*j).toInt());
            // else if (tagName == QLatin1String("COMPOSER"))
            // tags->setComposer(toQString(*j));
            else if (tagName == QLatin1String("LYRICS"))
                tags->setLyrics(TagLibUtils::toQString(*j));
            //else if (tagName == QLatin1String("BPM"))
            //    tags->bpm = toQString(*j).toInt();
            // else qDebug() << "Unused tag" << tagName << toQString(*j);
        }
    }
    */

    // Handle file types where TagLibf:::File::tag() returns a "TagUnion"
    TagLib::File *file = fileref.file();

    if (TagLib::MPEG::File *f = dynamic_cast<TagLib::MPEG::File*>(file)) {
        if (TagLib::ID3v2::Tag *t = f->ID3v2Tag()) Id3Utils::load(t, tags);

    } else if (TagLib::TrueAudio::File *f = dynamic_cast<TagLib::TrueAudio::File*>(file)) {
        if (TagLib::ID3v2::Tag *t = f->ID3v2Tag()) Id3Utils::load(t, tags);

    } else if (TagLib::FLAC::File *f = dynamic_cast<TagLib::FLAC::File*>(file)) {
        if (TagLib::Ogg::XiphComment *t = f->xiphComment()) VorbisUtils::load(t, tags);
        else if (TagLib::ID3v2::Tag *t = f->ID3v2Tag()) Id3Utils::load(t, tags);

    } else if (TagLib::APE::File *f = dynamic_cast<TagLib::APE::File*>(file)) {
        if (TagLib::APE::Tag *t = f->APETag()) ApeUtils::load(t, tags);

    } else if (TagLib::MPC::File *f = dynamic_cast<TagLib::MPC::File*>(file)) {
        if (TagLib::APE::Tag *t = f->APETag()) ApeUtils::load(t, tags);

    } else if (TagLib::WavPack::File *f = dynamic_cast<TagLib::WavPack::File*>(file)) {
        if (TagLib::APE::Tag *t = f->APETag()) ApeUtils::load(t, tags);

    } else {

        // Fallback to casting tag() for any other file type
        TagLib::Tag *tag = file->tag();

        if (TagLib::ID3v2::Tag *t = dynamic_cast<TagLib::ID3v2::Tag*>(tag))
            Id3Utils::load(t, tags);

        else if (TagLib::Ogg::XiphComment *t = dynamic_cast<TagLib::Ogg::XiphComment*>(tag))
            VorbisUtils::load(t, tags);

        else if (TagLib::APE::Tag *t = dynamic_cast<TagLib::APE::Tag*>(tag))
            ApeUtils::load(t, tags);

        else if (TagLib::MP4::Tag *t = dynamic_cast<TagLib::MP4::Tag*>(tag))
            Mp4Utils::load(t, tags);

        else if (TagLib::ASF::Tag *t = dynamic_cast<TagLib::ASF::Tag*>(tag))
            AsfUtils::load(t, tags);
    }

    return tags;
}

void TagReader::ReadFile(const QString& filename,
                         pb::tagreader::SongMetadata* song) const {
  const QByteArray url(QUrl::fromLocalFile(filename).toEncoded());
  const QFileInfo info(filename);

  qLog(Debug) << "Reading tags from" << filename;

  song->set_basefilename(DataCommaSizeFromQString(info.fileName()));
  song->set_url(url.constData(), url.size());
  song->set_filesize(info.size());
  song->set_mtime(info.lastModified().toTime_t());
  song->set_ctime(info.created().toTime_t());

  std::unique_ptr<TagLib::FileRef> fileref(factory_->GetFileRef(filename));
  if (fileref->isNull()) {
    qLog(Info) << "TagLib hasn't been able to read " << filename << " file";
    return;
  }

  TagLib::Tag* tag = fileref->tag();
  if (tag) {
    Decode(tag->title(), nullptr, song->mutable_title());
    Decode(tag->artist(), nullptr, song->mutable_artist());  // TPE1
    Decode(tag->album(), nullptr, song->mutable_album());
    Decode(tag->genre(), nullptr, song->mutable_genre());
    song->set_year(tag->year());
    song->set_track(tag->track());
    song->set_valid(true);
  }

  QString disc;
  QString compilation;

  // Handle all the files which have VorbisComments (Ogg, OPUS, ...) in the same
  // way;
  // apart, so we keep specific behavior for some formats by adding another
  // "else if" block below.
  if (TagLib::Ogg::XiphComment* tag =
          dynamic_cast<TagLib::Ogg::XiphComment*>(fileref->file()->tag())) {
    ParseOggTag(tag->fieldListMap(), nullptr, &disc, &compilation, song);
  }

  if (TagLib::MPEG::File* file =
          dynamic_cast<TagLib::MPEG::File*>(fileref->file())) {
    if (file->ID3v2Tag()) {
      const TagLib::ID3v2::FrameListMap& map = file->ID3v2Tag()->frameListMap();

      if (!map["TPOS"].isEmpty())
        disc = TStringToQString(map["TPOS"].front()->toString()).trimmed();

      if (!map["TBPM"].isEmpty())
        song->set_bpm(TStringToQString(map["TBPM"].front()->toString())
                          .trimmed()
                          .toFloat());

      if (!map["TCOM"].isEmpty())
        Decode(map["TCOM"].front()->toString(), nullptr,
               song->mutable_composer());

      if (!map["TIT1"].isEmpty())  // content group
        Decode(map["TIT1"].front()->toString(), nullptr,
               song->mutable_grouping());

      // Skip TPE1 (which is the artist) here because we already fetched it

      if (!map["TPE2"].isEmpty())  // non-standard: Apple, Microsoft
        Decode(map["TPE2"].front()->toString(), nullptr,
               song->mutable_albumartist());

      if (!map["TCMP"].isEmpty())
        compilation =
            TStringToQString(map["TCMP"].front()->toString()).trimmed();

      if (!map["APIC"].isEmpty()) song->set_art_automatic(kEmbeddedCover);

      // Find a suitable comment tag.  For now we ignore iTunNORM comments.
      for (int i = 0; i < map["COMM"].size(); ++i) {
        const TagLib::ID3v2::CommentsFrame* frame =
            dynamic_cast<const TagLib::ID3v2::CommentsFrame*>(map["COMM"][i]);

        if (frame && TStringToQString(frame->description()) != "iTunNORM") {
          Decode(frame->text(), nullptr, song->mutable_comment());
          break;
        }
      }

      // Parse FMPS frames
      for (int i = 0; i < map["TXXX"].size(); ++i) {
        const TagLib::ID3v2::UserTextIdentificationFrame* frame =
            dynamic_cast<const TagLib::ID3v2::UserTextIdentificationFrame*>(
                map["TXXX"][i]);

        if (frame && frame->description().startsWith("FMPS_")) {
          ParseFMPSFrame(TStringToQString(frame->description()),
                         TStringToQString(frame->fieldList()[1]), song);
        }
      }

      // Check POPM tags
      // We do this after checking FMPS frames, so FMPS have precedence, as we
//.........这里部分代码省略.........