Device Transport State

Microsoft DirectShow 9.0

Device Transport State

To retrieve the current state of the device, such as play, pause, or stop, call the IAMExtTransport::get_Mode method. The method retrieves a constant that indicates the device state:

Value	Device State
ED_MODE_PLAY	Play
ED_MODE_STOP	Stop
ED_MODE_FREEZE	Pause
ED_MODE_FF	Fast-forward
ED_MODE_REW	Rewind
ED_MODE_RECORD	Record
ED_MODE_RECORD_FREEZE	Record-pause

The following code checks the device state:

LONG State;
hr = MyDevCap.pTransport->get_Mode(&State);
if (SUCCEEDED(hr))
{
    switch (State)
    {
        case ED_MODE_PLAY:
        // ... 
    }
}

See Also

• Controlling a DV Camcorder