本文整理汇总了C++中taglib::FileRef::isNull方法的典型用法代码示例。如果您正苦于以下问题：C++ FileRef::isNull方法的具体用法？C++ FileRef::isNull怎么用？C++ FileRef::isNull使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类taglib::FileRef的用法示例。
在下文中一共展示了FileRef::isNull方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: readTags
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(),"") ;
}
}
}
}示例2: tuneFromFile
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;
}示例3: getAudioInfo
bool getAudioInfo(const QString& file, qint64* durationMiliSecs, int* bitrate)
{
TagLib::FileRef ref = Qomp::fileName2TaglibRef(file);
if(!ref.isNull() && ref.audioProperties()) {
TagLib::AudioProperties *prop = ref.audioProperties();
*bitrate = prop->bitrate();
*durationMiliSecs = prop->length() * 1000;
return true;
}
return false;
}示例4: AddFromFile_Taglib
// Use Taglib to parse tags from file and add entried to wxListCtrl
void AddFromFile_Taglib(wxListCtrl *listctrl, const std::map< wxString, long > &mapping, const wxString &filename)
{
TagLib::FileRef f = TagLib::FileRef(filename.c_str(), TagLib::String::UTF8 ); //TODO: is c_str() safe?
if ( f.isNull() )
{
wxLogError(wxT("Error: TagLib could not read ") + filename + wxT("."));
return;
}
if ( ! f.tag() )
{
wxLogError(wxT("Error: TagLib could not read the tags of file ") + filename + wxT("."));
return;
}
TagLib::Tag *tag = f.tag();
auto idx = listctrl->GetItemCount();
auto row_idx = listctrl->InsertItem(idx, wxString::Format(wxT("%d"), idx) );
// TODO: check return values
listctrl->SetItem(row_idx, mapping.find("Artist")->second, wxString(tag->artist().to8Bit(true)) );
listctrl->SetItem(row_idx, mapping.find("Trackname")->second, wxString(tag->title().to8Bit(true)));
listctrl->SetItem(row_idx, mapping.find("Album")->second, wxString(tag->album().to8Bit(true)));
if ( f.audioProperties() )
{
TagLib::AudioProperties *properties = f.audioProperties();
int seconds = properties->length() % 60;
int minutes = (properties->length() - seconds) / 60;
wxString timestr = wxString::Format("%d:%02d", minutes, seconds);
listctrl->SetItem(row_idx, mapping.find("Time")->second, timestr);
}
}