/// <summary>
/// Create a new instance of a BIOP descriptor.
/// </summary>
/// <param name="byteData">The MPEG2 section containing the descriptor.</param>
/// <param name="index">Index of the descriptor tag in the MPEG2 section.</param>
/// <returns>A BIOP descriptor instance.</returns>
public static BIOPDescriptor Create(byte[] byteData, int index)
{
BIOPDescriptor descriptor = null;
switch (byteData[index])
{
case DVBCompressedModuleDescriptor.Tag:
descriptor = new DVBCompressedModuleDescriptor();
break;
case MHPLabelDescriptor.Tag:
descriptor = new MHPLabelDescriptor();
break;
case MHPCachingPriorityDescriptor.Tag:
descriptor = new MHPCachingPriorityDescriptor();
break;
case MHPContentTypeDescriptor.Tag:
descriptor = new MHPContentTypeDescriptor();
break;
default:
throw (new InvalidOperationException("BIOPDescriptor: Tag not recognized - " + byteData[index]));
}
descriptor.Process(byteData, index);
return(descriptor);
}
/// <summary>
/// Parse the module information.
/// </summary>
/// <param name="byteData">The MPEG2 section containing the module information.</param>
/// <param name="index">Index of the first byte of the module information in the MPEG2 section.</param>
public void Process(byte[] byteData, int index)
{
lastIndex = index;
try
{
moduleTimeout = Utils.Convert4BytesToInt(byteData, lastIndex);
lastIndex += 4;
blockTimeout = Utils.Convert4BytesToInt(byteData, lastIndex);
lastIndex += 4;
minimumBlockTime = Utils.Convert4BytesToInt(byteData, lastIndex);
lastIndex += 4;
tapsCount = (int)byteData[lastIndex];
lastIndex++;
if (tapsCount != 0)
{
taps = new Collection <BIOPTap>();
while (taps.Count < tapsCount)
{
BIOPTap tap = new BIOPTap();
tap.Process(byteData, lastIndex);
taps.Add(tap);
lastIndex = tap.Index;
}
}
userInfoLength = (int)byteData[lastIndex];
lastIndex++;
if (userInfoLength != 0)
{
descriptors = new Collection <BIOPDescriptor>();
while (userInfoLength > 0)
{
BIOPDescriptor descriptor = BIOPDescriptor.Create(byteData, lastIndex);
descriptors.Add(descriptor);
userInfoLength -= (descriptor.Index - lastIndex);
lastIndex = descriptor.Index;
}
}
Validate();
}
catch (IndexOutOfRangeException)
{
throw (new ArgumentOutOfRangeException("The BIOP Module Info message is short"));
}
}
