/// <summary>
/// Tries to create a packet from the header information.
/// </summary>
/// <param name="data">The data.</param>
/// <param name="timeStamp">The time stamp.</param>
/// <param name="packet">The packet.</param>
/// <returns></returns>
internal static bool TryBuild(DJTapRecieveData data, DateTime timeStamp, out DJTapPacket packet)
{
DJTapHeader header = new DJTapHeader(MessageTypes.None);
packet = header;
try
{
//We have read all the data.
if (data.EndOfData())
{
data.Reset();
return(false);
}
//Check we have enough data to construct the header.
if (data.Length - data.ReadPosition < DJTapHeader.PacketSize)
{
return(false);
}
//Read the packet header.
header.ReadData(data.GetReader());
//Ensure the header packet is valid
if (!header.IsValid())
{
//Purge data as it is probably corrupted.
data.Reset(); //Reset position to start so we dump the data.
return(false);
}
//Read the sub packet
switch (header.ContentType)
{
case MessageTypes.GWOffer:
packet = new GWOffer();
break;
case MessageTypes.Timecode:
packet = new Timecode();
break;
default:
return(false);
}
packet.TimeStamp = timeStamp;
packet.ReadData(data.GetReader());
}
catch (EndOfStreamException)
{
return(false);
}
return(packet != null);
}
/// <summary>
/// Called periodically to send a GWOffer packet and advertise our prescence.
/// </summary>
/// <remarks>
/// The GWOffer is sent every second/
/// </remarks>
/// <param name="state">The state.</param>
private void Poll(object state)
{
try
{
GWOffer offerPacket = new GWOffer();
offerPacket.Brand = Brand;
offerPacket.Model = Model;
Send(offerPacket);
}
catch (SocketException ex)
{
StopAdvertising();
OnUnhandledException(new ApplicationException("Socket error while advertising ProDJTap, advertising will stop.", ex));
}
finally
{
if (advertTimer != null)
{
advertTimer.Change(1000, Timeout.Infinite);
}
}
}
