QObject *Factory::backend(bool createWhenNull)
{
if (globalFactory.isDestroyed()) {
return 0;
}
if (createWhenNull && globalFactory->m_backendObject == 0) {
globalFactory->createBackend();
// XXX: might create "reentrancy" problems:
// a method calls this method and is called again because the
// backendChanged signal is emitted
emit globalFactory->backendChanged();
}
return globalFactory->m_backendObject;
}
void Factory::deregisterFrontendObject(MediaNodePrivate *bp)
{
// The Factory can already be cleaned up while there are other frontend objects still alive.
// When those are deleted they'll call deregisterFrontendObject through ~BasePrivate
if (!globalFactory.isDestroyed()) {
globalFactory->mediaNodePrivateList.removeAll(bp);
}
}
bool Factory::isMimeTypeAvailable(const QString &mimeType)
{
#ifndef QT_NO_PHONON_PLATFORMPLUGIN
PlatformPlugin *f = globalFactory->platformPlugin();
if (f) {
return f->isMimeTypeAvailable(mimeType);
}
#else
Q_UNUSED(mimeType);
#endif //QT_NO_PHONON_PLATFORMPLUGIN
return true; // the MIME type might be supported, let BackendCapabilities find out
}
bool FactoryPrivate::createBackend()
{
Q_ASSERT(m_backendObject == 0);
#ifndef QT_NO_PHONON_PLATFORMPLUGIN
PlatformPlugin *f = globalFactory->platformPlugin();
if (f) {
m_backendObject = f->createBackend();
}
#endif //QT_NO_PHONON_PLATFORMPLUGIN
if (!m_backendObject) {
ensureLibraryPathSet();
// could not load a backend through the platform plugin. Falling back to the default
// (finding the first loadable backend).
const QLatin1String suffix("/phonon_backend/");
foreach (QString libPath, QCoreApplication::libraryPaths()) {
libPath += suffix;
const QDir dir(libPath);
if (!dir.exists()) {
pDebug() << Q_FUNC_INFO << dir.absolutePath() << "does not exist";
continue;
}
foreach (const QString &pluginName, dir.entryList(QDir::Files)) {
QPluginLoader pluginLoader(libPath + pluginName);
if (!pluginLoader.load()) {
pDebug() << Q_FUNC_INFO << " load failed:"
<< pluginLoader.errorString();
continue;
}
pDebug() << pluginLoader.instance();
m_backendObject = pluginLoader.instance();
if (m_backendObject) {
break;
}
// no backend found, don't leave an unused plugin in memory
pluginLoader.unload();
}
if (m_backendObject) {
break;
}
}
PlatformPlugin *Factory::platformPlugin()
{
return globalFactory->platformPlugin();
}
bool FactoryPrivate::createBackend()
{
#ifndef QT_NO_LIBRARY
Q_ASSERT(m_backendObject == 0);
#ifndef QT_NO_PHONON_PLATFORMPLUGIN
PlatformPlugin *f = globalFactory->platformPlugin();
if (f) {
m_backendObject = f->createBackend();
}
#endif //QT_NO_PHONON_PLATFORMPLUGIN
if (!m_backendObject) {
ensureLibraryPathSet();
// could not load a backend through the platform plugin. Falling back to the default
// (finding the first loadable backend).
const QLatin1String suffix("/phonon_backend/");
const QStringList paths = QCoreApplication::libraryPaths();
for (int i = 0; i < paths.count(); ++i) {
const QString libPath = paths.at(i) + suffix;
const QDir dir(libPath);
if (!dir.exists()) {
pDebug() << Q_FUNC_INFO << dir.absolutePath() << "does not exist";
continue;
}
QStringList plugins(dir.entryList(QDir::Files));
#ifdef Q_OS_SYMBIAN
/* On Symbian OS we might have two plugins, one which uses Symbian
* MMF framework("mmf"), and one which uses Real Networks's
* Helix("hxphonon"). We prefer the latter because it's more
* sophisticated, so we make sure the Helix backend is attempted
* to be loaded first, and the MMF backend is used for backup. */
{
const int helix = plugins.indexOf(QLatin1String("hxphonon"));
if (helix != -1)
plugins.move(helix, 0);
}
#endif
const QStringList files = dir.entryList(QDir::Files);
for (int i = 0; i < files.count(); ++i) {
QPluginLoader pluginLoader(libPath + files.at(i));
if (!pluginLoader.load()) {
pDebug() << Q_FUNC_INFO << " load failed:"
<< pluginLoader.errorString();
continue;
}
pDebug() << pluginLoader.instance();
m_backendObject = pluginLoader.instance();
if (m_backendObject) {
break;
}
// no backend found, don't leave an unused plugin in memory
pluginLoader.unload();
}
if (m_backendObject) {
break;
}
}
if (!m_backendObject) {
pWarning() << Q_FUNC_INFO << "phonon backend plugin could not be loaded";
return false;
}
}
connect(m_backendObject, SIGNAL(objectDescriptionChanged(ObjectDescriptionType)),
SLOT(objectDescriptionChanged(ObjectDescriptionType)));
return true;
#else //QT_NO_LIBRARY
pWarning() << Q_FUNC_INFO << "Trying to use Phonon with QT_NO_LIBRARY defined. "
"That is currently not supported";
return false;
#endif
}
