public override void NegociateDevice()
{
if(!m_bIsConnected)
{
log.Debug("Try to connect to a Capture Device.");
m_iConnectionsAttempts++;
//----------------------------------------------------------------------------------------
// TODO: Proper device negociation.
// Apparently there's no way to know if a device is already used by an application.
// Let's try to connect to the first device if any.
// If the device is already streaming to another application, we will connect successfully,
// but the NewFrame event will never be raised for us.
//----------------------------------------------------------------------------------------
FilterInfoCollection videoDevices = new FilterInfoCollection( FilterCategory.VideoInputDevice );
if(videoDevices.Count > 0)
{
ConnectToDevice(videoDevices, 0);
}
if(!m_bIsConnected && m_iConnectionsAttempts == 2)
{
m_Container.AlertCannotConnect();
}
}
}
public override void NegociateDevice()
{
if(!m_bIsConnected)
{
log.Debug("Trying to connect to a Capture source.");
m_iConnectionsAttempts++;
// TODO: Detect if a device is already in use
// (by an other app or even just by the other screen).
List<DeviceDescriptor> devices = ListDevices();
if(devices.Count > 0)
{
bool bSuccess = false;
// Check if we were already connected to a device.
// In that case we try to reconnect to the same one instead of defaulting to the first of the list.
// Unless that was the empty device placeholder. (This might happen if we start with 0 device and plug one afterwards)
// The network placeholder device is not subject to the disconnection/reconnection mechanism either.
if(m_CurrentVideoDevice != null && !m_CurrentVideoDevice.Empty && !m_CurrentVideoDevice.Network)
{
// Look for the device we were previously connected to.
bool bFoundCurrentDevice = false;
for(int i = 0; i < devices.Count - 1; i++)
{
if(devices[i].Identification == m_CurrentVideoDevice.Identification)
{
bFoundCurrentDevice = true;
log.DebugFormat("Trying to reconnect to {0}.", m_CurrentVideoDevice.Name);
bSuccess = ConnectToDevice(devices[i]);
}
}
// If not found, default to the first one anyway.
if(!bFoundCurrentDevice && !devices[0].Empty)
{
log.DebugFormat("Current device not found (has been physically unplugged) - connect to first one ({0})", devices[0].Name);
bSuccess = ConnectToDevice(devices[0]);
}
}
else
{
// We were not connected to any device, or we were connected to a special device.
// Connect to the first one (Capture device).
if(!devices[0].Empty)
{
log.DebugFormat("First attempt, default to first device ({0})", devices[0].Name);
bSuccess = ConnectToDevice(devices[0]);
}
}
if(bSuccess)
m_Container.Connected();
}
m_iGrabbedSinceLastCheck = 0;
if(m_bIsConnected)
m_iConnectionsWithoutFrames++;
if(!m_bIsConnected && m_iConnectionsAttempts == 2)
m_Container.AlertCannotConnect();
}
}