WMF: fixed compilation on Windows Vista.

We were using one function which is available only on Windows 7 (and
later). Replace it with Vista-compatible calls.

Task-number: QTBUG-32864
Change-Id: I77492a407330c3689dfbf8dc1180894cf7ca5f8d
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
WMF: allow to load media whose content doesn't match its file extension.

This also allows to play streams without providing a MIME type.

Task-number: QTBUG-33631
Task-number: QTBUG-33518
Change-Id: Ia106592cb5ed0a0f7ede6308dc8e2c12cf4e63b1
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
WMF: allow to set a qrc file name as source of a QAudioDecoder.

Task-number: QTBUG-33518
Change-Id: I01d8a1fa7b9a1c3ea2af9de6033dff2773cd6ace
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
Add Linguist comment for translation of Drive-mode.

Translators not familiar with cameras might mistake it for
something related to driving a car.

Change-Id: If54a563a32af537d291b79253056b7b57e108f5b
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Reviewed-by: Andy Nichols <andy.nichols@digia.com>
WMF: fix output samples from our video probe MFTransform.

The EVR sink allocates its buffers and expect the node connected to it
to use them. Our video probe MFTransform should therefore copy the input
buffers into the EVR buffers rather than just passing on the input
buffers.

Task-number: QTBUG-30435
Change-Id: I978479ced341b96ce627c682f99662dec1dfdb3f
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
Correctly clear the current media in Audio and MediaPlayer qml elements.

When setting the source to an empty string in these elements, pass an
empty QMediaContent to the backend rather than an empty URL. The former
is the correct way to clear the current media.

Task-number: QTBUG-34125
Change-Id: I3dd7b07abc0bd23a1253c8c0e075b174c17a4d3f
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
Merge remote-tracking branch 'origin/stable' into dev

Change-Id: I15d0b9f03136840aff189ffb9de6e3899c204ca2