/// <summary>
/// One of the listeners saw a new stream
/// </summary>
/// This could be invoked on behalf of either the presenter or the conferencing listener.
/// <param name="rtpStream"></param>
private void OnRtpStreamAdded(object o, RtpEvents.RtpStreamEventArgs ea)
{
String streamID = makeStreamIdentifier(ea.RtpStream.Properties.CName, ea.RtpStream.Properties.Name);
Debug.WriteLine("StreamAdded: " + streamID + " payload:" + ea.RtpStream.PayloadType.ToString());
bool selected = false;
if ((confSession != null) && (confSession.Streams.ContainsKey(ea.RtpStream.SSRC)))
{
if (ea.RtpStream.PayloadType == MSR.LST.Net.Rtp.PayloadType.dynamicAudio)
{
assrcs.Add(ea.RtpStream.SSRC, streamID);
selected = assrcs.IsChecked(streamID);
}
if (ea.RtpStream.PayloadType == MSR.LST.Net.Rtp.PayloadType.dynamicVideo)
{
vssrcs.Add(ea.RtpStream.SSRC, streamID);
selected = vssrcs.IsChecked(streamID);
}
if (OnStreamAddRemove != null)
{
StreamAddRemoveEventArgs area = new StreamAddRemoveEventArgs(true, selected, streamID, ea.RtpStream.PayloadType);
OnStreamAddRemove(area);
}
}
if ((presenterSession != null) && (presenterSession.Streams.ContainsKey(ea.RtpStream.SSRC)))
{
if (ea.RtpStream.PayloadType == MSR.LST.Net.Rtp.PayloadType.dynamicPresentation)
{
//Note: this is not necessarily an Instructor node, but we need to let the listen threads figure that out.
if (OnPresentationStreamAdded != null)
{
OnPresentationStreamAdded(ea);
}
}
}
}
/// <summary>
/// Event handler for RTP Stream Removed. Note this is not raised before a listener terminates.
/// </summary>
/// <param name="o"></param>
/// <param name="ea"></param>
private void OnRtpStreamRemoved(object o, RtpEvents.RtpStreamEventArgs ea)
{
String streamID = makeStreamIdentifier(ea.RtpStream.Properties.CName, ea.RtpStream.Properties.Name);
Debug.WriteLine("StreamRemoved: " + streamID + " payload:" + ea.RtpStream.PayloadType.ToString());
//PRI2: There is a potential problem here because I have no way to tell which session triggered the event.
if (confSession != null)
{
if (ea.RtpStream.PayloadType == MSR.LST.Net.Rtp.PayloadType.dynamicAudio)
{
assrcs.Remove(streamID);
}
if (ea.RtpStream.PayloadType == MSR.LST.Net.Rtp.PayloadType.dynamicVideo)
{
vssrcs.Remove(streamID);
}
if (OnStreamAddRemove != null)
{
StreamAddRemoveEventArgs area = new StreamAddRemoveEventArgs(false, false, streamID, ea.RtpStream.PayloadType);
OnStreamAddRemove(area);
}
}
if (presenterSession != null)
{
if (ea.RtpStream.PayloadType == MSR.LST.Net.Rtp.PayloadType.dynamicPresentation)
{
if (OnPresentationStreamRemoved != null)
{
OnPresentationStreamRemoved(ea);
}
}
}
}
/// <summary>
/// record all the active conference streams in the SSRCManagers
/// </summary>
/// Note that this would normally happen via StreamAdded event handlers.
/// This is a hack to workaround a situation with presenter and conference on
/// the same venue.
private void AddConferenceStreams()
{
SSRCToStreamHashtable streams;
RtpStream stream;
String streamID;
bool selected = false;
if (confSession != null)
{
streams = (SSRCToStreamHashtable)confSession.Streams;
foreach (object ssrc in streams.Keys)
{
stream = (RtpStream)streams[(uint)ssrc];
if (stream == null)
{
continue;
}
streamID = makeStreamIdentifier(stream.Properties.CName, stream.Properties.Name);
if (stream.PayloadType == PayloadType.dynamicAudio)
{
assrcs.Add((uint)ssrc, streamID);
selected = assrcs.IsChecked(streamID);
}
if (stream.PayloadType == PayloadType.dynamicVideo)
{
vssrcs.Add((uint)ssrc, streamID);
selected = vssrcs.IsChecked(streamID);
}
if (OnStreamAddRemove != null)
{
StreamAddRemoveEventArgs area = new StreamAddRemoveEventArgs(true, selected, streamID, stream.PayloadType);
OnStreamAddRemove(area);
}
}
}
}
