C++ Tag::track方法代码示例

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(),"") ;
            }
        }
    }

}

bool parseAndWrite(const char* location, Json::Writer& writer)
{
  Json::Value metadata;
  metadata[LOCATION] = location;
  TagLib::FileRef f(location);

  if (f.isNull()){
    return false;
  }

  if (f.tag() && !f.tag()->isEmpty()){
    TagLib::Tag* tag = f.tag();
    TagLib::String artist = tag->artist();
    TagLib::String album = tag->artist();
    TagLib::String title = tag->title();

    uint track = tag->track();
    uint year = tag->year();

    metadata[TITLE] = title.toCString(true);
    metadata[ARTIST] = artist.toCString(true);
    metadata[ALBUM] = album.toCString(true);
    metadata[TRACK] = track;
    metadata[YEAR] = year;
  }

  std::cout << writer.write(metadata);
  return true;
}

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;
        }
    }
}

AlbumTrack::AlbumTrack(Album* album, QString trackPath)
{
    this->path = trackPath;
    this->number = 0;
    this->artist = "Unknown Artist";
    this->album = album;
    this->genre = "Unknown Genre";

    TagLib::FileRef f(trackPath.toStdString().c_str());
    if(!f.isNull() && f.tag())
    {
        TagLib::Tag *tag = f.tag();
        title = QString(tag->title().toCString());
        number = tag->track();
        artist = QString(tag->artist().toCString());
        albumName = QString(tag->album().toCString());
        genre = QString(tag->genre().toCString());
    }
    if(!f.isNull() && f.audioProperties())
    {
        TagLib::AudioProperties *properties = f.audioProperties();
        duration = properties->length() * 1000;
        //Weil Fmod die gerne in Millisekunden hätte
    }
}

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

    cout << "path:" << argv[i] << endl;

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

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

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

      cout << "title:" << (tag->title()).toCString(true)   << endl;
      cout << "artist:" << (tag->artist()).toCString(true) << endl;
      cout << "album:" << (tag->album()).toCString(true)   << endl;
      cout << "albumartist:" << (tag->albumArtist()).toCString(true) << endl;
      cout << "track:" << tag->track() << endl;
      cout << "disc:"  << tag->cdNr() << endl;
    }

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

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

      cout << "bitrate:" << properties->bitrate() << endl;
      cout << "length:" << properties->length()  << endl;
    }
  if(i!=argc-1)
    cout << "---" << endl;
  }
  return 0;
}

Tune* tuneFromFile(const QString& file)
{
	Tune* tune = new Tune(false);
	tune->file = file;

	TagLib::FileRef ref = fileName2TaglibRef(file);
	if(!ref.isNull()) {
		if(ref.tag()) {
			TagLib::Tag* tag = ref.tag();
			tune->artist = safeTagLibString2QString( tag->artist() );
			tune->album = safeTagLibString2QString( tag->album() );
			tune->title = safeTagLibString2QString( tag->title() );
			tune->trackNumber = QString::number( tag->track() );
			tune->genre = safeTagLibString2QString( tag->genre() );
		}

		Qomp::loadCover(tune, ref.file());

		if(ref.audioProperties()) {
			TagLib::AudioProperties *prop = ref.audioProperties();
			tune->duration = Qomp::durationSecondsToString( prop->length() );
			tune->bitRate = QString::number( prop->bitrate() );
		}

		tune->setMetadataResolved(true);
	}

	return tune;
}

bool MP3::readID3v2(const std::string& filename, Metadata& meta) {
	// After reading http://mail.kde.org/pipermail/taglib-devel/2008-March/000902.html
	// adding a big lock seems reasonable
	try {
		taglib_mutex.lock();	
		TagLib::MPEG::File f(filename.c_str());
		
		if (f.isValid() && f.tag()) {
			TagLib::Tag* pTag = f.tag();
			meta.interpret = pTag->artist().isNull() ? "" : pTag->artist().to8Bit(true);
			meta.album = pTag->album().isNull() ? "" : pTag->album().to8Bit(true);
			meta.title = pTag->title().isNull() ? "" : pTag->title().to8Bit(true);
			meta.genre = pTag->genre().isNull() ? "" : pTag->genre().to8Bit(true);
			meta.track_no = pTag->track();
			meta.year = pTag->year();
			taglib_mutex.unlock();
			return meta.complete();
		}
	} catch (const std::exception&) {
		taglib_mutex.unlock();
		// ...
	}
	
	return false;
}

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;
}

void DataStore::addSongToLibrary(const Phonon::MediaSource& song, QSqlQuery &addQuery){
  QString fileName = song.fileName();
  QString songName;
  QString artistName;
  QString albumName;
  QString genre;
  int track;
  int duration;
  TagLib::FileRef f(fileName.toStdString().c_str());
  if(!f.isNull() && f.tag() && f.audioProperties()){
    TagLib::Tag *tag = f.tag();
    songName = TStringToQString(tag->title());
    artistName = TStringToQString(tag->artist());
    albumName = TStringToQString(tag->album());
    genre = TStringToQString(tag->genre());
    duration = f.audioProperties()->length();
    track = tag->track();
  }
  else{
    //TODO throw error
    return;
  }

  if(songName == ""){
    songName = unknownSongTitle();
  }
  if(artistName == ""){
    artistName = unknownSongArtist();
  }
  if(albumName == ""){
    albumName = unknownSongAlbum();
  }
  if(genre == ""){
    genre = unknownGenre();
  }

  Logger::instance()->log("adding song with title: " + songName + " to database");

  library_song_id_t hostId =-1;

  addQuery.bindValue(":song", songName);
  addQuery.bindValue(":artist", artistName);
  addQuery.bindValue(":album", albumName);
  addQuery.bindValue(":genre", genre);
  addQuery.bindValue(":track", track);
  addQuery.bindValue(":file", fileName);
  addQuery.bindValue(":duration", duration);
  EXEC_INSERT(
    "Failed to add song library" << songName.toStdString(), 
    addQuery,
    hostId,
    library_song_id_t)
}

	void FileStore::scan(const string & a_path) {
		if (!fs::exists(a_path)) 
			return;
		if (fs::is_directory(a_path)) {
			fs::directory_iterator end; // default construction yields past-the-end
			for (fs::directory_iterator curr(a_path); curr != end; ++curr) {
				fs::path p = curr->path();
				string s = p.string();
				scan(s);
			}
		} else if (fs::is_regular_file(a_path)) {
			if (pathExists(a_path))
				return;
			TagLib::FileRef file_ref(a_path.c_str(), false);
			if (!file_ref.isNull() && file_ref.tag()) {
				cerr << "indexing " << a_path << endl;
				TagLib::Tag *t = file_ref.tag();
				string artist = t->artist().to8Bit(true);
				string album = t->album().to8Bit(true);
				string title = t->title().to8Bit(true);
				string genre = t->genre().to8Bit(true);
				string year = t->year() > 0 ? lexical_cast<string>(t->year()) : "";
				string track = t->track() > 0 ? lexical_cast<string>(t->track()) : "";
				string uri = "file://" + a_path;
				shared_ptr<UUID> fileID(generateID());
				addField(*fileID, ARTIST, artist);
				addField(*fileID, ARTIST, artist);
				addField(*fileID, ALBUM, album);
				addField(*fileID, YEAR, year);
				addField(*fileID, TITLE, title);
				addField(*fileID, GENRE, genre);
				addField(*fileID, TRACK, track);
				addField(*fileID, URI, uri);
			}
		}
	}

string scan_file(const char* path)
{
    TagLib::FileRef f(path);
    if (!f.isNull() && f.tag()) {
        TagLib::Tag *tag = f.tag();
        int filesize = boost::filesystem::file_size(path);
        int bitrate = 0;
        int duration = 0;
        if (f.audioProperties()) {
            TagLib::AudioProperties *properties = f.audioProperties();
            duration = properties->length();
            bitrate = properties->bitrate();
        }
        string artist = tag->artist().toCString(true);
        string album  = tag->album().toCString(true);
        string track  = tag->title().toCString(true);
        boost::trim(artist);
        boost::trim(album);
        boost::trim(track);
        if (artist.length()==0 || track.length()==0) {
            return "{\"error\" : \"no tags\"}\n";
        }
        string ext(toUtf8(boost::filesystem::extension(path)));
        string mimetype = ext2mime(boost::to_lower_copy(ext));
        // turn it into a url by prepending file://
        // because we pass all urls to curl:
        string urlpath = urlify( toUtf8(path) );

        ostringstream os;
        os      <<  "{  \"url\" : \"" << urlpath << "\","
                    "   \"filesize\" : " << filesize << ","
                    "   \"mimetype\" : \"" << mimetype << "\","
                    "   \"artist\" : \"" << tidy(artist) << "\","
                    "   \"album\" : \"" << tidy(album) << "\","
                    "   \"track\" : \"" << tidy(track) << "\","
                    "   \"duration\" : " << duration << ","
                    "   \"bitrate\" : " << bitrate << ","
                    "   \"trackno\" : " << tag->track()

                <<  "}\n";
        return os.str();
    }
    return "{\"error\" : \"no tags\"}\n";
}

string scan_file(const char* path)
{
    TagLib::FileRef f(path);
    if (!f.isNull() && f.tag()) {
        TagLib::Tag *tag = f.tag();
        int bitrate = 0;
        int duration = 0;
        if (f.audioProperties()) {
            TagLib::AudioProperties *properties = f.audioProperties();
            duration = properties->length();
            bitrate = properties->bitrate();
        }
        string artist = tag->artist().toCString(true);
        string album  = tag->album().toCString(true);
        string track  = tag->title().toCString(true);
        trim(artist);
        trim(album);
        trim(track);
        if (artist.length()==0 || track.length()==0) {
            return "{\"error\" : \"no tags\"}";
        }
        string pathstr(path);
        string ext = pathstr.substr(pathstr.length()-4);
        std::transform(ext.begin(), ext.end(), ext.begin(), ::tolower);
        string mimetype = ext2mime(ext);
        // turn it into a url by prepending file://
        // because we pass all urls to curl:
        string urlpath = urlify( path );

        ostringstream os;
        os      <<  "{  \"url\" : \"" << esc(urlpath) << "\","
                    "   \"mimetype\" : \"" << mimetype << "\","
                    "   \"artist\" : \"" << tidy(artist) << "\","
                    "   \"album\" : \"" << tidy(album) << "\","
                    "   \"track\" : \"" << tidy(track) << "\","
                    "   \"duration\" : " << duration << ","
                    "   \"bitrate\" : " << bitrate << ","
                    "   \"trackno\" : " << tag->track()
                <<  "}";
        return os.str();
    }
    return "{\"error\" : \"no tags\"}";
}

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;
}