/// <summary>
/// Tries to find the local tag in the primer pack and if so,
/// adds the referring key to the tag.
/// </summary>
/// <param name="tag"></param>
private void AddRefKeyFromPrimerPack(MXFLocalTag tag)
{
if (this.Partition != null && this.Partition.PrimerKeys != null)
{
if (this.Partition.PrimerKeys.ContainsKey(tag.Tag))
{
MXFEntryPrimer entry = this.Partition.PrimerKeys[tag.Tag];
tag.Key = entry.AliasUID.Key;
}
}
}
/// <summary>
///
/// </summary>
/// <param name="reader"></param>
private void Initialize(MXFReader reader)
{
// Make sure we read at the data position
reader.Seek(this.DataOffset);
// Read all local tags
long klvEnd = this.DataOffset + this.Length;
while (reader.Position + 4 < klvEnd)
{
MXFLocalTag tag = new MXFLocalTag(reader);
long next = tag.DataOffset + tag.Size;
if (tag.Tag == 0x3C0A)
{
// Generic instance UID
this.InstanceUID = reader.ReadKey();
}
else
{
if (tag.Tag > 0x7FFF)
{
// Find the tag in the primerpack's keys
if (this.Partition != null && this.Partition.PrimerKeys != null)
{
if (this.Partition.PrimerKeys.ContainsKey(tag.Tag))
{
MXFEntryPrimer entry = this.Partition.PrimerKeys[tag.Tag];
tag.Name = entry.AliasUID.Key.Name;
}
}
}
// Allow derived classes to handle the data
if (!ParseLocalTag(reader, tag))
{
// Not processed, use default
tag.Parse(reader);
// Add to the collection
AddChild(tag);
}
}
reader.Seek(next);
}
// Allow derived classes to do some final work
PostInitialize();
}
/// <summary>
/// Set all properties to readonly (recursive through to the base classes)
/// </summary>
public void UpdateTypeDescriptions(Type type, Dictionary <UInt16, MXFEntryPrimer> allPrimerKeys)
{
if (type != null && allPrimerKeys != null)
{
if (type.BaseType != null)
{
UpdateTypeDescriptions(type.BaseType, allPrimerKeys);
}
foreach (PropertyDescriptor prop in TypeDescriptor.GetProperties(type))
{
DescriptionAttribute attr = prop.Attributes[typeof(DescriptionAttribute)] as DescriptionAttribute;
if (attr != null)
{
if (!string.IsNullOrEmpty(attr.Description) && attr.Description.Length == 4)
{
string newDescription = "";
// Get the local tag
try
{
UInt16 localTag = (UInt16)Convert.ToInt32(attr.Description, 16);
// Find the local tag in the primer pack
if (allPrimerKeys.ContainsKey(localTag))
{
MXFEntryPrimer prime = allPrimerKeys[localTag];
newDescription = prime.AliasUID.Key.Name;
}
FieldInfo fi = attr.GetType().GetField("description", BindingFlags.NonPublic | BindingFlags.Instance);
if (fi != null)
{
fi.SetValue(attr, newDescription);
}
}
catch (Exception)
{
}
}
}
}
}
}
/// <summary>
/// Read partition tag list
/// </summary>
/// <param name="reader"></param>
/// <param name="categoryName"></param>
/// <returns></returns>
protected UInt32 ReadTagList(MXFReader reader, string categoryName)
{
UInt32 nofItems = reader.ReadD();
UInt32 objectSize = reader.ReadD(); // useless size of objects, always 16 according to specs
MXFObject keylist = new MXFNamedObject(categoryName, reader.Position);
if (nofItems > 0 && nofItems < UInt32.MaxValue)
{
m_PrimerKeys = new Dictionary <UInt16, MXFEntryPrimer>();
for (int n = 0; n < nofItems; n++)
{
MXFEntryPrimer entry = new MXFEntryPrimer(reader);
m_PrimerKeys.Add(entry.LocalTag, entry); // Add to our own internal list
keylist.AddChild(entry); // And add the entry as one of our children
}
}
this.AddChild(keylist);
return(nofItems);
}
