C++ File::audioProperties方法代码示例

bool KMpcPlugin::readInfo( KFileMetaInfo& info, uint what )
{

    bool readComment = false;
    bool readTech = false;
    if (what & (KFileMetaInfo::Fastest |
                KFileMetaInfo::DontCare |
                KFileMetaInfo::ContentInfo)) readComment = true;

    if (what & (KFileMetaInfo::Fastest |
                KFileMetaInfo::DontCare |
                KFileMetaInfo::TechnicalInfo)) readTech = true;

    if ( info.path().isEmpty() ) // remote file
        return false;

    TagLib::File *file = new TagLib::MPC::File(QFile::encodeName(info.path()).data(), readTech);

    if (!file->isOpen())
    {
        kDebug(7034) << "Couldn't open " << file->name();
        delete file;
        return false;
    }

    if(readComment)
    {
        KFileMetaInfoGroup commentgroup = appendGroup(info, "Comment");

        QString date  = file->tag()->year() > 0 ? QString::number(file->tag()->year()) : QString();
        QString track = file->tag()->track() > 0 ? QString::number(file->tag()->track()) : QString();

        appendItem(commentgroup, "Title",       TStringToQString(file->tag()->title()).trimmed());
        appendItem(commentgroup, "Artist",      TStringToQString(file->tag()->artist()).trimmed());
        appendItem(commentgroup, "Album",       TStringToQString(file->tag()->album()).trimmed());
        appendItem(commentgroup, "Date",        date);
        appendItem(commentgroup, "Comment",     TStringToQString(file->tag()->comment()).trimmed());
        appendItem(commentgroup, "Tracknumber", track);
        appendItem(commentgroup, "Genre",       TStringToQString(file->tag()->genre()).trimmed());
    }

    if (readTech)
    {
        KFileMetaInfoGroup techgroup = appendGroup(info, "Technical");
        TagLib::MPC::Properties *properties =
                   (TagLib::MPC::Properties*)(file->audioProperties());

        appendItem(techgroup, "Bitrate",      properties->bitrate());
        appendItem(techgroup, "Sample Rate",  properties->sampleRate());
        appendItem(techgroup, "Channels",     properties->channels());
        appendItem(techgroup, "Length",       properties->length());
        appendItem(techgroup, "Version",      properties->mpcVersion());
    }

    delete file;
    return true;

}

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;
}

//Adds dir & its contents to the library
void libraryDialog::addDir2Lib(QDir dir)
{
	dir.setFilter(QDir::Files | QDir::Dirs | QDir::NoSymLinks | QDir::NoDotAndDotDot);
	QDirIterator di(dir, QDirIterator::Subdirectories);	

	while(di.hasNext())
	{
		di.next();		
		QString fpath = di.filePath();
		QFileInfo f = di.fileInfo();
		if(isAudioFile(f))//Add this song to the database
		{
			wchar_t wname[250]; //TODO: Dynamic. Need to figure out wchar length from QStr length
			wname[fpath.toWCharArray(wname)] = 0;
			TagLib::FileName fname(wname);
			//We'll store tag information in these:
			QMap<QString, QString> stmap;
			QMap<QString, int> itmap;
			
			TagLib::File* file = NULL;
			//MP3 Means we can check for additional info in ID3v2 tags
			if(f.suffix() == "mp3")
			{				
				TagLib::MPEG::File* fr = new TagLib::MPEG::File(fname, true, TagLib::AudioProperties::ReadStyle::Fast);				
				if(fr->ID3v2Tag())
				{					
					//Somehow this means album artist / band. http://www.id3.org/id3v2.4.0-frames
					TagLib::ID3v2::FrameList l = fr->ID3v2Tag()->frameList("TPE2");
					if(!l.isEmpty())
						stmap["albumartist"] = l.front()->toString().toCString();
				}
				file = dynamic_cast<TagLib::File*>(fr);
			}
			if(file == NULL)
			{
				qDebug() << "ERR: " + fpath;
				continue; //TODO: Error out here
			}
			//Try to get audio properties
			TagLib::AudioProperties* ap = file->audioProperties();			
			
			TagLib::Tag* genTag = file->tag();			
			stmap["name"] = genTag->title().toCString();
			stmap["genre"] = genTag->genre().toCString();
			itmap["year"] = genTag->year();
			itmap["tracknum"] = genTag->track();
			stmap["album"] = genTag->album().toCString();						
			stmap["artist"] = genTag->artist().toCString();			
			if(ap != NULL)
				itmap["length"] = ap->length();
			stmap["path"] = fpath;	
			//Add collected info to db
			DBItem s;
			s.strVals = stmap;
			s.intVals = itmap;

			myparent->dbi->addSong(s);
			delete file;
		}
		else if(f.isDir())
			ui.curDirLbl->setText(fpath);
		//if(top) //If we're the top level of recursion update prog bar
		//	ui.progressBar->setValue(di./siz * 100);		
		qApp->processEvents();
	}
}

bool KFlacPlugin::readInfo( KFileMetaInfo& info, uint what )
{
    if ( info.path().isEmpty() ) // remote file
        return false;

    bool readComment = false;
    bool readTech = false;
    if (what & (KFileMetaInfo::Fastest |
                KFileMetaInfo::DontCare |
                KFileMetaInfo::ContentInfo)) readComment = true;

    if (what & (KFileMetaInfo::Fastest |
                KFileMetaInfo::DontCare |
                KFileMetaInfo::TechnicalInfo)) readTech = true;

    TagLib::File *file = 0;

    if (info.mimeType() == "audio/x-flac")
        file = new TagLib::FLAC::File(QFile::encodeName(info.path()).data(), readTech);
#ifdef TAGLIB_1_2
    else
        file = new TagLib::Ogg::FLAC::File(QFile::encodeName(info.path()).data(), readTech);
#endif

    if (!file || !file->isValid())
    {
        kdDebug(7034) << "Couldn't open " << file->name() << endl;
        delete file;
        return false;
    }

    if(readComment && file->tag())
    {
        KFileMetaInfoGroup commentgroup = appendGroup(info, "Comment");

        QString date  = file->tag()->year() > 0 ? QString::number(file->tag()->year()) : QString::null;
        QString track = file->tag()->track() > 0 ? QString::number(file->tag()->track()) : QString::null;

        appendItem(commentgroup, "Title",       TStringToQString(file->tag()->title()).stripWhiteSpace());
        appendItem(commentgroup, "Artist",      TStringToQString(file->tag()->artist()).stripWhiteSpace());
        appendItem(commentgroup, "Album",       TStringToQString(file->tag()->album()).stripWhiteSpace());
        appendItem(commentgroup, "Date",        date);
        appendItem(commentgroup, "Comment",     TStringToQString(file->tag()->comment()).stripWhiteSpace());
        appendItem(commentgroup, "Tracknumber", track);
        appendItem(commentgroup, "Genre",       TStringToQString(file->tag()->genre()).stripWhiteSpace());
    }

    if (readTech && file->audioProperties())
    {
        KFileMetaInfoGroup techgroup = appendGroup(info, "Technical");
        TagLib::FLAC::Properties *properties =
                   (TagLib::FLAC::Properties*)(file->audioProperties());

        appendItem(techgroup, "Bitrate",      properties->bitrate());
        appendItem(techgroup, "Sample Rate",  properties->sampleRate());
        appendItem(techgroup, "Sample Width", properties->sampleWidth());
        appendItem(techgroup, "Channels",     properties->channels());
        appendItem(techgroup, "Length",       properties->length());
    }

    delete file;
    return true;

}