private void DumpBeacon(BeaconPacket bp)
{
Debug.WriteLine("BeaconPacket dump: \n" +
" Alive=" + bp.Alive.ToString() + "\n" +
" BGColor=" + bp.BGColor.ToString() + "\n" +
" ID=" + bp.ID.ToString() + "\n" +
" Role=" + bp.Role.ToString() + "\n" +
" FName=" + bp.FriendlyName + "\n" +
" Name=" + bp.Name + "\n" +
" Time=" + bp.Time.ToString() + "\n\n");
}
// Find index of a packet with a matching name. Return -1 if not found
public int Lookup(BeaconPacket bp)
{
for (int index = 0; index < packets.Count; index++)
{
BeaconPacket bp1 = (BeaconPacket)packets[index];
if (bp1.Name == bp.Name)
{
return(index);
}
}
return(-1);
}
/// <summary>
/// receive frame from Presenter 3
/// </summary>
/// <param name="bc"></param>
/// <param name="ssrc"></param>
private void presenterRTNavReceive(BufferChunk bc, uint ssrc)
{
BinaryFormatter bf = new BinaryFormatter();
Object obj = null;
try
{
MemoryStream ms = new MemoryStream((byte[])bc);
obj = bf.Deserialize(ms);
//Debug.WriteLine("presenterRTNavReceive deserialized bc Size=" + bc.Length.ToString());
//The BeaconPacket is used to allow us to latch on to a presenter if we are not
//currently listeneing to anyone, and to update the active presenters count
//on the main form. Beacon packet also contains the background color, so we will
//send it to scriptQueue as well.
if (obj is CP3.Network.Chunking.Chunk)
{
string friendlyName;
int role = CP3Manager.CP3Manager.AnalyzeChunk((CP3.Network.Chunking.Chunk)obj, out friendlyName);
if (1 == role)
{
BeaconPacket bp = new BeaconPacket(ssrc.ToString(), (int)ssrc, ssrc.ToString(),
ViewerFormControl.RoleType.Presenter,
DateTime.Now, System.Drawing.Color.White);
ReceiveBeacon(bp, ssrc);
}
}
}
catch (Exception e)
{
Debug.WriteLine("PresenterRTNavReceive exception deserializing message. size=" + bc.Length.ToString() +
" exception=" + e.ToString());
//eventLog.WriteEntry(e.Message );
return;
}
if (ssrc != currentPresenterSSRC) // not from the currently selected ssrc
{
return;
}
if (scriptQueue != null)
{
scriptQueue.Enqueue(obj);
}
scriptCount++; //this is not quite right because not all frames result in scripts.
}
public void Add(BeaconPacket bp, DateTime time)
{
BeaconPacket newPacket = new BeaconPacket(bp.Name, bp.ID, bp.FriendlyName, bp.Role, time, bp.BGColor);
int index = Lookup(bp);
if (index != -1)
{
packets[index] = newPacket;
}
else
{
packets.Add(newPacket);
}
}
private void ReceiveBeacon(BeaconPacket bp, uint thisSSRC)
{
DateTime dt = DateTime.Now;
livenessMonitor.Add(bp, dt);
if ((bp.Role == ViewerFormControl.RoleType.Presenter) && (currentPresenterSSRC == 0))
{
currentPresenterSSRC = thisSSRC;
}
// This happens if a presenter we're listening to changes roles.
if ((bp.Role != ViewerFormControl.RoleType.Presenter) && (currentPresenterSSRC == thisSSRC))
{
currentPresenterSSRC = 0;
}
}
// Count the viewers and presenters since a given time.
public int LivePackets(DateTime time, bool isPresenter)
{
int count = 0;
ViewerFormControl.RoleType role;
if (isPresenter)
{
role = ViewerFormControl.RoleType.Presenter;
}
else
{
role = ViewerFormControl.RoleType.Viewer;
}
for (int i = 0; i < packets.Count; i++)
{
BeaconPacket bp = (BeaconPacket)packets[i];
if ((bp.Time >= time) && (bp.Role == role))
{
count++;
}
}
return(count);
}
