private static TtElement BuildDocument(XDocument xml, TimeSpan timeOffset, TimeSpan defaultEndTime)
{
TtElement parsetree = null;
try
{
parsetree = (TtElement)TimedTextElementBase.Parse(xml.Root);
}
catch (TimedTextException) { }
if (parsetree == null)
{
throw new TimedTextException("No Parse tree returned");
}
if (!parsetree.Valid())
{
throw new TimedTextException("Document is Well formed XML, but invalid Timed Text");
}
var startTime = new TimeCode(timeOffset, TimeExpression.CurrentSmpteFrameRate);
var endTime = new TimeCode(defaultEndTime, TimeExpression.CurrentSmpteFrameRate);
parsetree.ComputeTimeIntervals(TimeContainer.Par, startTime, endTime);
return(parsetree);
}
public IEnumerable <CaptionRegion> ParseMarkerCollection(XDocument markerXml, TimeSpan timeOffset, TimeSpan defaultEndTime)
{
//try
{
TtElement document = BuildDocument(markerXml, timeOffset, defaultEndTime);
return(BuildRegions(document));
}
//catch (Exception ex)
//{
// throw new ArgumentException("TimedTextMarkerParser.ParseMarkerCollection received invalid input.", ex);
//}
}
private static IEnumerable <CaptionRegion> BuildRegions(TtElement document)
{
var regionElementsHash = document.Head != null
? document.Head.Children.Where(i => i is LayoutElement)
.SelectMany(i => i.Children)
.Cast <RegionElement>()
.ToDictionary(i => i.Id, i => i)
: new Dictionary <string, RegionElement>();
var captionRegionsHash = regionElementsHash.Values
.Select(MapToCaptionRegion)
.ToDictionary(i => i.Id, i => i);
if (document.Body != null)
{
BuildCaptions(document.Body, regionElementsHash, captionRegionsHash);
}
return(captionRegionsHash.Values.ToList());
}