C++ StringList::append方法代码示例

int meta_addTag(char* filename, TagLib::String tag)
{
	TagLib::StringList tags;
	if (meta_getTags(filename, &tags) != EXIT_SUCCESS)
		return EXIT_FAILURE;
	tags.append(optarg);
	return meta_setTags(filename, tags);
}

int MetaDSF::setTag(const TagLib::String &key, const TagLib::String &val, 
		    bool replace) 
{
  TagLib::StringList vals;
  
  vals.append(val);
  return setTag(key, vals, replace);
}

void FileHelper::setArtistAlbum(const QString &artistAlbum)
{
	switch (_fileType) {
	case EXT_FLAC: {
		this->setFlacAttribute("ALBUMARTIST", artistAlbum);
		break;
	}
	case EXT_MP4:{
		TagLib::StringList l;
		l.append(artistAlbum.toStdString().data());
		TagLib::MP4::Item item(l);
		this->setMp4Attribute("aART", item);
		break;
	}
	case EXT_MPC:
		//mpcFile = static_cast<MPC::File*>(f);
		qDebug() << Q_FUNC_INFO << "Not implemented for MPC";
		break;
	case EXT_MP3:{
		TagLib::MPEG::File *mpegFile = static_cast<TagLib::MPEG::File*>(_file);
		if (mpegFile->hasID3v2Tag()) {
			TagLib::ID3v2::Tag *tag = mpegFile->ID3v2Tag();
			QString convertedKey = this->convertKeyToID3v2Key("ARTISTALBUM");
			TagLib::ID3v2::FrameList l = tag->frameListMap()[convertedKey.toStdString().data()];
			if (!l.isEmpty()) {
				tag->removeFrame(l.front());
			}
			TagLib::ID3v2::TextIdentificationFrame *tif = new TagLib::ID3v2::TextIdentificationFrame(TagLib::ByteVector(convertedKey.toStdString().data()));
			tif->setText(artistAlbum.toStdString().data());
			tag->addFrame(tif);
		} else if (mpegFile->hasID3v1Tag()) {
			qDebug() << Q_FUNC_INFO << "Not implemented for ID3v1Tag";
		}
		break;
	}
	case EXT_OGG: {
		TagLib::Ogg::XiphComment *xiphComment = static_cast<TagLib::Ogg::XiphComment*>(_file->tag());
		if (xiphComment) {
			xiphComment->addField("ALBUMARTIST", artistAlbum.toStdString().data());
		} else {
			qDebug() << Q_FUNC_INFO << "Not implemented for this OGG file";
		}
		break;
	}
	default:
		qDebug() << Q_FUNC_INFO << "Not implemented for this type of file";
		break;
	}
}

BlockResult Block::eval(const TagLib::FileRef& file)
{
    TagLib::PropertyMap metadata = file.tag()->properties();
    TagLib::StringList list;
    std::stringstream ss;
    // TODO: Needs to be refactored
    // TODO: Add more
    ss << file.audioProperties()->length();
    list.append(ss.str());
    metadata.insert("length", list);
    list.clear();
    ss.clear();

    ss << file.audioProperties()->bitrate();
    list.append(ss.str());
    metadata.insert("bitrate", list);
    list.clear();
    ss.clear();

    if (file.audioProperties()->channels() == 1) {
        list.append("mono");
    } else if (file.audioProperties()->channels() == 2) {
        list.append("stereo");
    } //TODO: Add more channels names

    metadata.insert("channels", list);
    list.clear();
    ss.clear();

    ss << file.audioProperties()->sampleRate();
    list.append(ss.str());
    metadata.insert("samplerate", list);
    list.clear();
    ss.clear();

    list.append(file.file()->name());
    metadata.insert("filename", list);
    list.clear();
    ss.clear();

    return this->eval(metadata);
}

void TagLibExtractor::extract(ExtractionResult* result)
{
    const QString fileUrl = result->inputUrl();
    const QString mimeType = result->inputMimetype();

    TagLib::FileRef file(fileUrl.toUtf8().constData(), true);
    if (file.isNull()) {
        return;
    }

    TagLib::Tag* tags = file.tag();
    result->addType(Type::Audio);

    TagLib::String artists;
    TagLib::String albumArtists;
    TagLib::String composers;
    TagLib::String lyricists;
    TagLib::StringList genres;

    // Handling multiple tags in mpeg files.
    if ((mimeType == QLatin1String("audio/mpeg")) || (mimeType == QLatin1String("audio/mpeg3")) || (mimeType == QLatin1String("audio/x-mpeg"))) {
        TagLib::MPEG::File mpegFile(fileUrl.toUtf8().constData(), true);
        if (mpegFile.ID3v2Tag() && !mpegFile.ID3v2Tag()->isEmpty()) {
            TagLib::ID3v2::FrameList lstID3v2;

            // Artist.
            lstID3v2 = mpegFile.ID3v2Tag()->frameListMap()["TPE1"];
            if (!lstID3v2.isEmpty()) {
                for (TagLib::ID3v2::FrameList::ConstIterator it = lstID3v2.begin(); it != lstID3v2.end(); ++it) {
                    if (!artists.isEmpty()) {
                        artists += ", ";
                    }
                    artists += (*it)->toString();
                }
            }

            // Album Artist.
            lstID3v2 = mpegFile.ID3v2Tag()->frameListMap()["TPE2"];
            if (!lstID3v2.isEmpty()) {
                for (TagLib::ID3v2::FrameList::ConstIterator it = lstID3v2.begin(); it != lstID3v2.end(); ++it) {
                    if (!albumArtists.isEmpty()) {
                        albumArtists += ", ";
                    }
                    albumArtists += (*it)->toString();
                }
            }

            // Composer.
            lstID3v2 = mpegFile.ID3v2Tag()->frameListMap()["TCOM"];
            if (!lstID3v2.isEmpty()) {
                for (TagLib::ID3v2::FrameList::ConstIterator it = lstID3v2.begin(); it != lstID3v2.end(); ++it) {
                    if (!composers.isEmpty()) {
                        composers += ", ";
                    }
                    composers += (*it)->toString();
                }
            }

            // Lyricist.
            lstID3v2 = mpegFile.ID3v2Tag()->frameListMap()["TEXT"];
            if (!lstID3v2.isEmpty()) {
                for (TagLib::ID3v2::FrameList::ConstIterator it = lstID3v2.begin(); it != lstID3v2.end(); ++it) {
                    if (!lyricists.isEmpty()) {
                        lyricists += ", ";
                    }
                    lyricists += (*it)->toString();
                }
            }

            // Genre.
            lstID3v2 = mpegFile.ID3v2Tag()->frameListMap()["TCON"];
            if (!lstID3v2.isEmpty()) {
                for (TagLib::ID3v2::FrameList::ConstIterator it = lstID3v2.begin(); it != lstID3v2.end(); ++it) {
                    genres.append((*it)->toString());
                }
            }

        }
    }

    // Handling multiple tags in Ogg containers.
    {
        TagLib::Ogg::FieldListMap lstOgg;

        // FLAC files.
        if (mimeType == QLatin1String("audio/flac")) {
            TagLib::FLAC::File flacFile(fileUrl.toUtf8().constData(), true);
            if (flacFile.xiphComment() && !flacFile.xiphComment()->isEmpty()) {
                lstOgg = flacFile.xiphComment()->fieldListMap();
            }
        }

        // Vorbis files.
        if (mimeType == QLatin1String("audio/ogg") || mimeType == QLatin1String("audio/x-vorbis+ogg")) {
            TagLib::Ogg::Vorbis::File oggFile(fileUrl.toUtf8().constData(), true);
            if (oggFile.tag() && !oggFile.tag()->isEmpty()) {
                lstOgg = oggFile.tag()->fieldListMap();
            }
        }

//.........这里部分代码省略.........