/// <summary>
/// Create an instance of a DSMCC message.
/// </summary>
/// <param name="dsmccHeader">The header of the message.</param>
/// <param name="byteData">The MPEG2 data block that contains the message.</param>
/// <returns>An instance of the appropriate DSMCC message class.</returns>
public static DSMCCMessage CreateInstance(DSMCCHeader dsmccHeader, byte[] byteData)
{
DSMCCMessage dsmccMessage;
switch (dsmccHeader.MessageID)
{
case DSMCCDownloadDataBlock.MessageIDDownloadDataBlock:
dsmccMessage = new DSMCCDownloadDataBlock(dsmccHeader);
break;
case DSMCCDownloadInfoIndication.MessageIDDownloadInfoIndication:
dsmccMessage = new DSMCCDownloadInfoIndication(dsmccHeader);
break;
case DSMCCDownloadServerInitiate.MessageIDDownloadServerInitiate:
dsmccMessage = new DSMCCDownloadServerInitiate(dsmccHeader);
break;
case DSMCCDownloadCancel.MessageIDDownloadCancel:
dsmccMessage = new DSMCCDownloadCancel(dsmccHeader);
break;
default:
throw (new ArgumentException("The DSMCC message ID is out of range"));
}
dsmccMessage.Process(byteData, dsmccHeader.Index);
return(dsmccMessage);
}
/// <summary>
/// Create an instance of a DSMCC message.
/// </summary>
/// <param name="dsmccHeader">The header of the message.</param>
/// <param name="byteData">The MPEG2 data block that contains the message.</param>
/// <returns>An instance of the appropriate DSMCC message class.</returns>
public static DSMCCMessage CreateInstance(DSMCCHeader dsmccHeader, byte[] byteData)
{
DSMCCMessage dsmccMessage;
switch (dsmccHeader.MessageID)
{
case DSMCCDownloadDataBlock.MessageIDDownloadDataBlock:
dsmccMessage = new DSMCCDownloadDataBlock(dsmccHeader);
break;
case DSMCCDownloadInfoIndication.MessageIDDownloadInfoIndication:
dsmccMessage = new DSMCCDownloadInfoIndication(dsmccHeader);
break;
case DSMCCDownloadServerInitiate.MessageIDDownloadServerInitiate:
dsmccMessage = new DSMCCDownloadServerInitiate(dsmccHeader);
break;
case DSMCCDownloadCancel.MessageIDDownloadCancel:
dsmccMessage = new DSMCCDownloadCancel(dsmccHeader);
break;
default:
throw (new ArgumentException("The DSMCC message ID is out of range"));
}
dsmccMessage.Process(byteData, dsmccHeader.Index);
return (dsmccMessage);
}
private void processControlSection(Mpeg2Section section)
{
Mpeg2ExtendedHeader mpeg2Header = new Mpeg2ExtendedHeader();
try
{
mpeg2Header.Process(section.Data);
if (mpeg2Header.Current)
{
DSMCCSection dsmccSection = new DSMCCSection();
dsmccSection.Process(section.Data, mpeg2Header);
if (dsmccSection.DSMCCMessage as DSMCCDownloadServerInitiate != null)
addDSIMessage(dsmccSection.DSMCCMessage as DSMCCDownloadServerInitiate);
else
{
if (dsmccSection.DSMCCMessage as DSMCCDownloadInfoIndication != null)
addDIIMessage(dsmccSection.DSMCCMessage as DSMCCDownloadInfoIndication);
else
{
if (dsmccSection.DSMCCMessage as DSMCCDownloadCancel != null)
{
Logger.Instance.Write("DSMCC Cancel message received: reloading all data");
dsiMessage = null;
diiMessages = null;
modules = null;
}
}
}
}
}
catch (ArgumentOutOfRangeException e)
{
Logger.Instance.Write("<e> Error processing DSMCC control message: " + e.Message);
}
}
private bool addDSIMessage(DSMCCDownloadServerInitiate newMessage)
{
if (dsiMessage == null)
{
dsiMessage = newMessage;
dsiMessage.LogMessage();
return (true); ;
}
if (dsiMessage.DSMCCHeader.TransactionID.Identification == newMessage.DSMCCHeader.TransactionID.Identification)
{
if (dsiMessage.DSMCCHeader.TransactionID.Version == newMessage.DSMCCHeader.TransactionID.Version)
return (false);
else
{
dsiMessage = newMessage;
dsiMessage.LogMessage();
}
}
else
{
dsiMessage = newMessage;
dsiMessage.LogMessage();
}
return (true);
}