Output device selection in wmf not possible

First of all, availableOutputs() returns empty list. The list is updated only when starting to play a file. Calling updateEndpoints() in mfaudioendpointcontrol constructor fixes this issue.
Second issue is that setActiveOutput() does not have any effect because default endpoint is always used
(this is done in qtmultimedia\src\plugins\wmf\player\mfaudioendpointcontrol.cpp class createActivate())

Following code reproduces this issue. With directshow the problem does not exist, you can select the output device with following code.

    player = new QMediaPlayer(this);
    QMediaService* myService=player->service();
    QMediaControl *mediaControl=myService->requestControl(QAudioOutputSelectorControl_iid);
    QAudioOutputSelectorControl *myControl = qobject_cast<QAudioOutputSelectorControl *>(mediaControl);
    if(myControl)
    {
        QStringList deviceList=myControl->availableOutputs();
        foreach(QString str, deviceList) {
            qDebug()<<"device "<<str;
        }
    }