/// <summary>Static data initialization.</summary>
static HeaderNameExtensions()
{
Type mpeg4HeaderNameStartCode = typeof(Mpeg4HeaderName);
ICollection <Mpeg4HeaderName> allContainerHeaders = new HashSet <Mpeg4HeaderName>();
_headerNameForHeaderStartCode = new Dictionary <uint, Mpeg4HeaderName>();
_headerAttributes = new Dictionary <Mpeg4HeaderName, HeaderAttributes>();
_allowedNextHeaders = new Dictionary <Mpeg4HeaderName, HashSet <uint> >();
// Create the list to feed to the headers that can be in all container headers
allContainerHeaders.Add(Mpeg4HeaderName.Root);
// Use reflection to find the attributes describing the codec identifiers
foreach (Mpeg4HeaderName headerName in Enum.GetValues(mpeg4HeaderNameStartCode))
{
if (headerName == Mpeg4HeaderName.Unknown)
{
continue;
}
string name = Enum.GetName(mpeg4HeaderNameStartCode, headerName);
FieldInfo fieldInfo = mpeg4HeaderNameStartCode.GetField(name);
Mpeg4Attribute[] attributes = (Mpeg4Attribute[])fieldInfo.GetCustomAttributes(typeof(Mpeg4Attribute), false);
if (headerName == Mpeg4HeaderName.Root)
{
// The root container has no metadata and does not occur in any other header
_headerAttributes.Add(headerName, new HeaderAttributes(new uint[0], HeaderFlags.MasterHeader, new Mpeg4HeaderName[0]));
}
else if (attributes != null && attributes.Length == 1)
{
HeaderAttributes headerAttributes = GetHeaderAttributes(headerName, attributes[0], allContainerHeaders);
_headerAttributes.Add(headerName, headerAttributes);
// Fill the _headerNameForHeaderStartCode collection
if (headerName != Mpeg4HeaderName.VopWithShortHeader) // Special handling for short video headers
{
foreach (uint headerStartCode in headerAttributes.HeaderStartCodes)
{
_headerNameForHeaderStartCode.Add(headerStartCode, headerName);
}
}
}
else
{
Debug.Fail(string.Format(CultureInfo.CurrentCulture, "No attributes for {0}. Please add attributes to the HeaderName enumeration.", headerName));
}
}
// Use reflection to fill the _allowedNextHeaders collection
// This can not be done in the foreach loop above because the we need the start codes for all
// Mpeg4HeaderNames. This list is complete when the foreach loop above is done.
foreach (Mpeg4HeaderName headerName in Enum.GetValues(mpeg4HeaderNameStartCode))
{
string name = Enum.GetName(mpeg4HeaderNameStartCode, headerName);
FieldInfo fieldInfo = mpeg4HeaderNameStartCode.GetField(name);
Mpeg4Attribute[] attributes = (Mpeg4Attribute[])fieldInfo.GetCustomAttributes(typeof(Mpeg4Attribute), false);
if (attributes == null || attributes.Length == 0 || attributes[0].AllowedNextHeaders == null)
{
continue;
}
HashSet <uint> allowedHeaders = new HashSet <uint>();
foreach (Mpeg4HeaderName allowedNextHeader in attributes[0].AllowedNextHeaders)
{
ICollection <uint> allowedHeaderStartCodes = _headerAttributes[allowedNextHeader].HeaderStartCodes;
foreach (uint allowedHeaderStartCode in allowedHeaderStartCodes)
{
allowedHeaders.Add(allowedHeaderStartCode);
}
}
_allowedNextHeaders.Add(headerName, allowedHeaders);
}
CheckSuitableParents();
}
IColumnConfiguration <TModel> IColumnConfiguration <TModel> .SetHeaderAttributes(
IDictionary <string, object> attributes)
{
HeaderAttributes = HeaderAttributes.Merge(attributes);
return(this);
}
IColumnConfiguration <TModel> IColumnConfiguration <TModel> .SetHeaderCssClass(string @class)
{
HeaderAttributes = HeaderAttributes.Merge(new { @class });
return(this);
}
IColumnConfiguration <TModel> IColumnConfiguration <TModel> .SetHeaderAttributes(object attributes)
{
HeaderAttributes = HeaderAttributes.Merge(attributes);
return(this);
}
