IMFDeviceTransform::GetOutputStreamState method (mftransform.h)

The GetOutputStreamState method gets the Device MFT’s output stream state.

Syntax

HRESULT GetOutputStreamState(
  [in]  DWORD             dwStreamID,
  [out] DeviceStreamState *value
);

[in] dwStreamID

Stream ID of the output stream whose state needs to be retrieved.

[out] value

Specifies the current DeviceStreamState of the specified output Device MFT stream.

The method returns an HRESULT. Possible values include but not limited to values given in the following table.

Return code	Description
S_OK	Transitioning the stream state succeeded.
MF_E_INVALIDREQUEST	Device MFT could not support the request at this time.
MF_E_INVAILIDSTREAMNUMBER	An invalid stream ID was passed.

This method is used by device transform manager (DTM) to get a specific output stream’s state.