/// <summary>
/// Retreives all of the sections for the specified table.
/// </summary>
/// <param name="PID">packet ID</param>
/// <param name="TID">table ID</param>
/// <returns>a list of Sections. Or an empty list if an error occurs</returns>
private List <Section> GetAllSections(short PID, byte TID)
{
lock (mpeg2Data)
{
ISectionList sectionList = null;
List <Section> retreivedSections = new List <Section>();
try
{
sectionList = GetTableSectionList(PID, TID);
short sectionCount;
sectionList.GetNumberOfSections(out sectionCount);
for (short i = 0; i < sectionCount; i++)
{
try
{
IntPtr pSection;
int sectionSize;
int hr = sectionList.GetSectionData(i, out sectionSize, out pSection);
DsError.ThrowExceptionForHR(hr);
Section section = new Section(pSection);
if (section.SectionSyntaxIndicator)
{
section = new LongSection(pSection);
}
retreivedSections.Add(section);
}
catch (Exception ex)
{
Debug.WriteLine("Failed to retreive section:");
ErrorLogger.DumpToDebug(ex);
}
}
return(retreivedSections);
}
catch (Exception ex)
{
ErrorLogger.DumpToDebug(ex);
return(retreivedSections);
}
finally
{
if (sectionList != null)
{
Marshal.ReleaseComObject(sectionList);
}
}
}
}
/// <summary>
/// Adds the data contained in a given section to the virtual channel table.
/// </summary>
/// <param name="s">a Virtual Channel Table section</param>
private void AddSection(LongSection s)
{
if (s == null)
{
return;
}
byte protocol_version = s.Data[0];
byte num_channels_in_section = s.Data[1];
for (int i = 2, channel = 0; (i < s.Data.Length) && (channel < num_channels_in_section); channel++)
{
Entry cur = new VirtualChannelTable.Entry();
int bytesUsed;
cur.ParseFromArray(s.Data, i, out bytesUsed);
i += bytesUsed;
this.Items.Add(cur);
}
}
