internal void OnFrameReceivedEvent(BufferChunk frame)
{
framesReceived++;
// Don't trigger the event if it isn't hooked
// Although RtpEvents.FireEvent does this same check, we add it here for efficiency
// As audio / video streams create alot of data, but don't use the FrameReceived event
if (FrameReceived != null)
{
if (framesReceived == 1)
{
OnFirstFrameReceivedEvent();
}
object[] args = { this, new FrameReceivedEventArgs(this, frame) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RaiseFrameReceivedEvent), args);
}
else // Audio and Video
{
if (frameReceived)
{
if (framesReceived == 1)
{
firstFrame = frame.Peek(frame.Index, frame.Length);
OnFirstFrameReceivedEvent();
}
lastFrame = frame;
frameReceived = false;
nextFrameEvent.Set();
}
}
}
internal void RaiseInvalidPacketInFrameEvent(string reason)
{
++invalidPacketInFrameEvents;
object[] args = { this, new RtpEvents.InvalidPacketInFrameEventArgs(this, reason) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaiseInvalidPacketInFrameEvent), args);
}
// All of these events are called by Frame, and hence are internal
// TODO - try to decouple JVE
#region PacketOutOfSequence
internal void RaisePacketOutOfSequenceEvent(int packetsLost, string message)
{
this.packetsLost += packetsLost;
object[] args = { this, new RtpEvents.PacketOutOfSequenceEventArgs(this, packetsLost, message) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaisePacketOutOfSequenceEvent), args);
}
/// <summary>
/// Raises the ParticipantStatusChanged event if the data changed
/// </summary>
/// <param name="data"></param>
internal new void UpdateData(SdesData data)
{
if (base.UpdateData(data))
{
object[] args = { this, new RtpEvents.RtpParticipantEventArgs(this) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaiseRtpParticipantDataChangedEvent), args);
}
}
internal void RaiseFrameOutOfSequenceEvent(int framesLost, string message)
{
Trace.Assert(framesLost > 0, "framesLost should be greater than 0");
this.framesLost += framesLost;
object[] args = { this, new RtpEvents.FrameOutOfSequenceEventArgs(this, framesLost, message) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaiseFrameOutOfSequenceEvent), args);
}
private void ReceivePackets()
{
BufferChunk bc = null;
while (true)
{
try
{
bc = GetBuffer();
EndPoint ep;
rtpNetworkListener.ReceiveFrom(bc, out ep);
receivedPackets.Enqueue(new object[] { bc, ep });
newPacket.Set();
unchecked { pcPackets++; }
}
catch (ThreadAbortException) {}
catch (PoolExhaustedException e)
{
LogEvent(e.ToString(), EventLogEntryType.Error, (int)RtpEL.ID.UnboundedGrowth);
return; // Exit the thread gracefully
}
catch (System.Net.Sockets.SocketException e)
{
ReturnBuffer(bc);
// Something other than - No data received before timeout
if (e.ErrorCode != 10060)
{
Object[] args = new Object[] { this, new RtpEvents.HiddenSocketExceptionEventArgs((RtpSession)rtpSession, e) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaiseHiddenSocketExceptionEvent), args);
LogEvent(e.ToString(), EventLogEntryType.Error, (int)RtpEL.ID.Error);
}
}
catch (Exception e)
{
ReturnBuffer(bc);
LogEvent(e.ToString(), EventLogEntryType.Error, (int)RtpEL.ID.Error);
}
}
}
public void ListenThread()
{
CompoundPacket compoundPacket = new CompoundPacket();
EndPoint endPoint = null;
while (!disposed)
{
try
{
// Reset the packet for the next round of data
compoundPacket.Reset();
// Wait for data off the wire
rtcpNetworkListener.ReceiveFrom(compoundPacket.Buffer, out endPoint);
#region Fault Injection
#if FaultInjection
// Drop packets
if (rtpSession.DropPacketsPercent > 0)
{
if (rtpSession.Rnd.Next(1, 100) <= rtpSession.DropPacketsPercent)
{
continue;
}
}
#endif
#endregion Fault Injection
// Parse the data and rigorously validate it
compoundPacket.ParseBuffer();
// Pass it on to the rtpSession to analyze and distribute data
rtpSession.ProcessCompoundPacket(compoundPacket, ((IPEndPoint)endPoint).Address);
}
catch (System.Net.Sockets.SocketException e)
{
// No data received before timeout
if (e.ErrorCode == 10060)
{
rtpSession.RaiseNetworkTimeoutEvent("Rtcp");
}
// We get 10054 socket exceptions in some situations during unicast connections. Ignore them for now.
// Pri2: Find a better solution for the unicast socket exceptions
else if (e.ErrorCode == 10054 && !Utility.IsMulticast(rtcpNetworkListener.ExternalInterface))
{
continue;
}
else
{
Object[] args = new Object[] { this, new RtpEvents.HiddenSocketExceptionEventArgs((RtpSession)rtpSession, e) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaiseHiddenSocketExceptionEvent), args);
LogEvent(e.ToString(), EventLogEntryType.Error, (int)RtpEL.ID.Error);
}
}
catch (RtcpHeader.RtcpHeaderException e)
{
// TODO - this is a pretty serious error - what should we do - exit thread, squelch? JVE
LogEvent(e.ToString(), EventLogEntryType.Error, (int)RtpEL.ID.RtcpHeaderException);
}
catch (CompoundPacket.CompoundPacketException e)
{
// TODO - this is a pretty serious error - what should we do - exit thread, squelch? JVE
LogEvent(e.ToString(), EventLogEntryType.Error, (int)RtpEL.ID.CompoundPacketException);
}
catch (ThreadAbortException) {}
catch (Exception e)
{
LogEvent(e.ToString(), EventLogEntryType.Error, (int)RtpEL.ID.Error);
}
}
}
internal void OnDataStoppedEvent()
{
object[] args = { this, null };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RaiseDataStoppedEvent), args);
}
internal void OnFirstFrameReceivedEvent()
{
object[] args = { this, null };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RaiseFirstFrameReceivedEvent), args);
}
/// <summary>
/// Collects the Rtcp data from the session, assembles it into CompoundPackets (via the
/// CompoundPacketBuilder) and sends the packets
///
/// The current design has a "forced" Send occurring on the thread that makes the call, and
/// a normal Send occurring on the dedicated RtcpSender thread.
///
/// To make sure that multiple threads aren't making the call at the same time, which can
/// lead to data access exceptions (e.g. Queue empty), we lock here.
/// </summary>
/// <param name="forced">Is Send being called due to timing rules, or forced?</param>
private void Send(bool forced)
{
lock (this)
{
try
{
// We're Sending despite timing rules
if (forced)
{
lastSendForced = true;
}
else // We're Sending due to timing rules
{
// The timing rules may now be in conflict with a previous forced Send
// Ask the timing rules to reconsider again before Sending
if (lastSendForced)
{
lastSendForced = false;
return;
}
}
CompoundPacketBuilder cpb = rtpSession.RtcpReportIntervalReached();
cpb.BuildCompoundPackets();
Debug.Assert(cpb.PacketCount > 0);
// Send all compound packets (in case there is more than 1)
short packetCount = cpb.PacketCount;
int bytes = 0;
foreach (CompoundPacket cp in cpb)
{
BufferChunk data = cp.Data;
bytes += data.Length;
rtcpNetworkSender.Send(data);
}
// How long between the last send time and now
TimeSpan interval = DateTime.Now - lastSendTime;
// Update lastSendTime
lastSendTime = DateTime.Now;
// Update performance data
// Packets before bytes, since packets doesn't have any dependencies
// but BytesPerPacket requires a correct reading on the packet count
UpdatePerformancePackets(packetCount);
UpdatePerformanceBytes(bytes);
UpdatePerformanceInterval(interval, forced);
}
catch (ThreadAbortException) {}
catch (Exception e)
{
if (e is System.Net.Sockets.SocketException)
{
Object[] args = new Object[] { this, new RtpEvents.HiddenSocketExceptionEventArgs((RtpSession)rtpSession,
(System.Net.Sockets.SocketException)e) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaiseHiddenSocketExceptionEvent), args);
}
rtpSession.LogEvent("RtcpSender", e.ToString(), EventLogEntryType.Error, (int)RtpEL.ID.Error);
}
}
}
