public CXPCapabilityMessageReceiver(CXPCapabilityMessageSender sender, uint ssrc, PresenterModel model, ClassroomModel classroom, ParticipantModel participant)
{
this.m_Model = model;
this.m_Sender = sender;
this.m_RemoteSSRC = ssrc;
this.m_Context = new ReceiveContext(model, classroom, participant);
this.m_ContextArgs = new object[] { this.m_Context };
this.m_Queue = new MessageProcessingQueue(this);
this.m_Assembler = new ChunkAssembler();
this.m_Assembler.Nack += new ChunkAssembler.NackDelegate(this.HandleAssemblerNack);
}
public CXPCapabilityMessageReceiver(CXPCapabilityMessageSender sender, uint ssrc, PresenterModel model, ClassroomModel classroom, ParticipantModel participant)
{
this.m_Model = model;
this.m_Sender = sender;
this.m_RemoteSSRC = ssrc;
this.m_Context = new ReceiveContext(model, classroom, participant);
this.m_ContextArgs = new object[] { this.m_Context };
this.m_Queue = new MessageProcessingQueue(this);
this.m_Assembler = new ChunkAssembler();
this.m_Assembler.Nack += new ChunkAssembler.NackDelegate(this.HandleAssemblerNack);
}
public override bool RemoveCapability(ICapability capability) {
bool ret = base.RemoveCapability(capability);
if (ret) {
// Remove the ObjectReceived event handler.
// This form is going away, but the Capability may be replayed in which case we'd receive this event into a disposed form!
m_Capability.ObjectReceived -= new CapabilityObjectReceivedEventHandler(objectReceived);
m_CapabilitySender.Dispose();
m_Capability = null;
m_CapabilitySender = null;
}
return ret;
}
/// <summary>
/// Handle an event to be raised once after the capability's Send and Play methods have completed.
/// </summary>
void OnCapabilityPlay() {
m_Capability.OnPlay -= new PresenterCapability.OnPlayHandler(OnCapabilityPlay);
m_CapabilitySender = new CXPCapabilityMessageSender(m_Model, m_Capability);
}
public override void AddCapability(ICapability capability) {
base.AddCapability(capability);
if (m_Capability == null) {
m_Capability = (PresenterCapability)capability;
// Hook the ObjectReceived event so we can receive incoming data
m_Capability.ObjectReceived += new CapabilityObjectReceivedEventHandler(objectReceived);
//Set the role to instructor if we initiated the capability.
if (m_Capability.IsSender) {
//Set the instructor role
InstructorModel instructor = new InstructorModel(Guid.NewGuid());
using (Synchronizer.Lock(this.m_Model.Participant.SyncRoot)) {
m_Model.Participant.Role = instructor;
}
using (Synchronizer.Lock(this.m_Model.ViewerState.SyncRoot)) {
this.m_Model.ViewerState.iRole = 2;
}
//We also need to set up a couple of other things to make the instructor functional: A network association
// and an empty presentation.
PresentationModel pres = new PresentationModel(Guid.NewGuid(), m_Model.Participant, "Untitled Presentation", true);
using (Synchronizer.Lock(m_Model.Network.SyncRoot)) {
m_Model.Network.Association = m_Model.Participant;
}
using (Synchronizer.Lock(instructor.SyncRoot)) {
instructor.CurrentPresentation = pres;
}
}
else {
//Set student role
using (Synchronizer.Lock(this.m_Model.Participant.SyncRoot)) {
m_Model.Participant.Role = new StudentModel(Guid.NewGuid());
}
using (Synchronizer.Lock(this.m_Model.ViewerState.SyncRoot)) {
this.m_Model.ViewerState.iRole = 1;
}
}
//Before we create the CXPCapabilityMessageSender, we want to wait until the Play and Send methods have completed.
//Otherwise we can end up trying to send before the capability is ready to accept messages.
bool createCapabilitySenderNow = false;
lock (m_Capability) { //This section synchronized with the PresenterCapability instance.
if (m_Capability.IsPlayingAndSending) {
createCapabilitySenderNow = true;
}
else {
m_Capability.OnPlay += new PresenterCapability.OnPlayHandler(OnCapabilityPlay);
}
}
if (createCapabilitySenderNow) {
m_CapabilitySender = new CXPCapabilityMessageSender(m_Model, m_Capability);
}
}
}
