C++ File::isOpen方法代码示例

bool KMpcPlugin::writeInfo(const KFileMetaInfo& info) const
{
    TagLib::File *file;

    if (!TagLib::File::isWritable(QFile::encodeName(info.path()).data())) {
        kDebug(7034) << "can't write to " << info.path();
        return false;
    }

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

    if(!file->isOpen())
    {
        kDebug(7034) << "couldn't open " << info.path();
        delete file;
        return false;
    }

    Translator t(info);

    file->tag()->setTitle(t["Title"]);
    file->tag()->setArtist(t["Artist"]);
    file->tag()->setAlbum(t["Album"]);
    file->tag()->setYear(t.toInt("Date"));
    file->tag()->setComment(t["Comment"]);
    file->tag()->setTrack(t.toInt("Tracknumber"));
    file->tag()->setGenre(t["Genre"]);

    file->save();

    delete file;
    return true;
}

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 KFlacPlugin::writeInfo(const KFileMetaInfo& info) const
{
    TagLib::File *file;

    if (!TagLib::File::isWritable(QFile::encodeName(info.path()).data())) {
        kdDebug(7034) << "can't write to " << info.path() << endl;
        return false;
    }

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

    if(!file->isOpen())
    {
        kdDebug(7034) << "couldn't open " << info.path() << endl;
        delete file;
        return false;
    }

    Translator t(info);

    file->tag()->setTitle(t["Title"]);
    file->tag()->setArtist(t["Artist"]);
    file->tag()->setAlbum(t["Album"]);
    file->tag()->setYear(t.toInt("Date"));
    file->tag()->setComment(t["Comment"]);
    file->tag()->setTrack(t.toInt("Tracknumber"));
    file->tag()->setGenre(t["Genre"]);

    file->save();

    delete file;
    return true;
}

bool CTagLoaderTagLib::Load(const std::string& strFileName, CMusicInfoTag& tag, const std::string& fallbackFileExtension, MUSIC_INFO::EmbeddedArt *art /* = NULL */)
{
  std::string strExtension = URIUtils::GetExtension(strFileName);
  StringUtils::TrimLeft(strExtension, ".");

  if (strExtension.empty())
  {
    strExtension = fallbackFileExtension;
    if (strExtension.empty())
      return false;
  }

  StringUtils::ToLower(strExtension);
  TagLibVFSStream*           stream = new TagLibVFSStream(strFileName, true);
  if (!stream)
  {
    CLog::Log(LOGERROR, "could not create TagLib VFS stream for: %s", strFileName.c_str());
    return false;
  }

  ID3v1::Tag::setStringHandler(&ID3v1StringHandler);
  ID3v2::Tag::setLatin1StringHandler(&ID3v2StringHandler);
  TagLib::File*              file = NULL;
  TagLib::APE::File*         apeFile = NULL;
  TagLib::ASF::File*         asfFile = NULL;
  TagLib::FLAC::File*        flacFile = NULL;
  TagLib::IT::File*          itFile = NULL;
  TagLib::Mod::File*         modFile = NULL;
  TagLib::MP4::File*         mp4File = NULL;
  TagLib::MPC::File*         mpcFile = NULL;
  TagLib::MPEG::File*        mpegFile = NULL;
  TagLib::Ogg::Vorbis::File* oggVorbisFile = NULL;
  TagLib::Ogg::FLAC::File*   oggFlacFile = NULL;
  TagLib::S3M::File*         s3mFile = NULL;
  TagLib::TrueAudio::File*   ttaFile = NULL;
  TagLib::WavPack::File*     wvFile = NULL;
  TagLib::XM::File*          xmFile = NULL;
  TagLib::RIFF::WAV::File *  wavFile = NULL;
  TagLib::RIFF::AIFF::File * aiffFile = NULL;

  if (strExtension == "ape")
    file = apeFile = new APE::File(stream);
  else if (strExtension == "asf" || strExtension == "wmv" || strExtension == "wma")
    file = asfFile = new ASF::File(stream);
  else if (strExtension == "flac")
    file = flacFile = new FLAC::File(stream, ID3v2::FrameFactory::instance());
  else if (strExtension == "it")
    file = itFile = new IT::File(stream);
  else if (strExtension == "mod" || strExtension == "module" || strExtension == "nst" || strExtension == "wow")
    file = modFile = new Mod::File(stream);
  else if (strExtension == "mp4" || strExtension == "m4a" ||
           strExtension == "m4r" || strExtension == "m4b" ||
           strExtension == "m4p" || strExtension == "3g2")
    file = mp4File = new MP4::File(stream);
  else if (strExtension == "mpc")
    file = mpcFile = new MPC::File(stream);
  else if (strExtension == "mp3" || strExtension == "aac")
    file = mpegFile = new MPEG::File(stream, ID3v2::FrameFactory::instance());
  else if (strExtension == "s3m")
    file = s3mFile = new S3M::File(stream);
  else if (strExtension == "tta")
    file = ttaFile = new TrueAudio::File(stream, ID3v2::FrameFactory::instance());
  else if (strExtension == "wv")
    file = wvFile = new WavPack::File(stream);
  else if (strExtension == "aif" || strExtension == "aiff")
    file = aiffFile = new RIFF::AIFF::File(stream);
  else if (strExtension == "wav")
    file = wavFile = new RIFF::WAV::File(stream);
  else if (strExtension == "xm")
    file = xmFile = new XM::File(stream);
  else if (strExtension == "ogg")
    file = oggVorbisFile = new Ogg::Vorbis::File(stream);
  else if (strExtension == "oga") // Leave this madness until last - oga container can have Vorbis or FLAC
  {
    file = oggFlacFile = new Ogg::FLAC::File(stream);
    if (!file || !file->isValid())
    {
      delete file;
      oggFlacFile = NULL;
      file = oggVorbisFile = new Ogg::Vorbis::File(stream);
    }
  }

  if (!file || !file->isOpen())
  {
    delete file;
    delete stream;
    CLog::Log(LOGDEBUG, "file could not be opened for tag reading");
    return false;
  }

  APE::Tag *ape = NULL;
  ASF::Tag *asf = NULL;
  MP4::Tag *mp4 = NULL;
  ID3v1::Tag *id3v1 = NULL;
  ID3v2::Tag *id3v2 = NULL;
  Ogg::XiphComment *xiph = NULL;
  Tag *generic = NULL;

  if (apeFile)
//.........这里部分代码省略.........