public bool Parse()
{
try
{
#if DEBUG
Logger.Log("Begin parsing DASH manifest");
#endif
ParseMPDElement();
UpdateBaseUrl();
var periods = document.DocumentElement.ChildNodes.Where(node => node.NodeName.Equals("Period"));
#if DEBUG
Logger.Log(periods.Count().ToString() + " Periods found");
#endif
foreach (var period in periods)
{
Period dashPeriod = new Period();
periodStart = TimeSpan.FromSeconds(0);
ParsePeriodElement(period, ref dashPeriod);
var adaptationSets = period.ChildNodes.Where(node => node.NodeName.Equals("AdaptationSet"));
#if DEBUG
Logger.Log(adaptationSets.Count().ToString() + " Adaptation Sets found");
#endif
foreach (var adaptationSet in adaptationSets)
{
MediaStream stream = new MediaStream();
if (adaptationSet.Attributes.GetNamedItem("mimeType") != null)
{
stream.MimeType = adaptationSet.Attributes.GetNamedItem("mimeType").InnerText;
}
if (adaptationSet.Attributes.GetNamedItem("lang") != null)
{
stream.Language = adaptationSet.Attributes.GetNamedItem("lang").InnerText.Replace(" ", string.Empty);
}
var representations = adaptationSet.ChildNodes.Where(node => node.NodeName.Equals("Representation"));
//We are only grabbing one Representation in an Adaptation Set (the lowest one, just to be safe)
//(No support for adaptive streaming)
IXmlNode representation = GetLowestBitrateRepresentation(representations);
#if DEBUG
Logger.Log(representations.Count().ToString() + " Representations in " + stream.MimeType + " Adaptation Set with bitrate " + uint.Parse(representation.Attributes.GetNamedItem("bandwidth").InnerText));
#endif
//Parse Representation Element
uint bitrate;
string repID = string.Empty;
ParseRepresentationElement(representation,
out bitrate,
out repID);
var segmentTemplateQuery = adaptationSet.ChildNodes.Where(node => node.NodeName.Equals("SegmentTemplate"));
var segmentListQuery = adaptationSet.ChildNodes.Where(node => node.NodeName.Equals("SegmentList"));
var segmentBaseQuery = adaptationSet.ChildNodes.Where(node => node.NodeName.Equals("SegmentBase"));
if (segmentTemplateQuery.Count() != 0)
{
stream.SegmentInfoType = MediaStream.SegmentInformationType.Template;
//Parse Segment Template Element
UInt64 timescale = 1;
string initializationFormat = string.Empty;
string mediaFormat = string.Empty;
UInt64 segmentDuration = 0;
uint startNumber = 1;
UInt64 presentationTimeOffset = 0;
var segmentTemplate = segmentTemplateQuery.First();
ParseSegmentTemplateElement(segmentTemplate,
ref timescale, ref initializationFormat,
ref mediaFormat, ref segmentDuration,
ref startNumber, ref presentationTimeOffset);
DeterminePeriodStart(presentationTimeOffset, period, ref dashPeriod);
string initializationUrl;
//$Number$ and $Time$ will never be present in the initialization URL
ExpandDASHUrlSegmentTemplate(initializationFormat, manifest.BaseUrl,
bitrate, repID, 0, 0, out initializationUrl);
stream.InitSegmentUrl = initializationUrl;
var segmentTimelineQuery = segmentTemplate.ChildNodes.Where(node => node.NodeName.Equals("SegmentTimeline"));
MediaSegmentInformation segmentInfo = new MediaSegmentInformation();
segmentInfo.Timescale = timescale;
segmentInfo.RepresentationID = repID;
segmentInfo.Bitrate = bitrate;
//No timeline present.
//Instead of populating the segments in the stream, we will give just enough information to produce
//the information to construct media segment urls on the fly in the SourceBufferManager
if (segmentTimelineQuery.Count() == 0)
{
#if DEBUG
Logger.Log("Making number base segment info from SegmentTemplate");
#endif
stream.SegmentTemplateBase = MediaStream.SegmentTemplateIdentifier.Number;
segmentInfo.Duration = segmentDuration;
segmentInfo.UrlTemplate = mediaFormat;
UInt64 segmentNumber = startNumber;
if (manifest.IsLive)
{
var hnsFragmentDuration = ((segmentDuration * 10000000) / timescale);
CalculateNumberIdentifierForLive(hnsFragmentDuration, ref segmentNumber);
}
segmentInfo.StartNumber = segmentNumber;
segmentInfo.StartTimestamp = segmentDuration * (segmentNumber - 1);
stream.CanGenerateSegmentsDynamically = true;
}
else
{
stream.SegmentTemplateBase = MediaStream.SegmentTemplateIdentifier.Time;
MakeTimelineInfo(segmentTimelineQuery.First(), bitrate, timescale,
repID, startNumber, presentationTimeOffset,
mediaFormat, ref stream);
}
stream.SegmentInformation = segmentInfo;
}
else if (segmentListQuery.Count() != 0)
{
#if DEBUG
Logger.Log("Manifest parsing error: " + "Does not support a SegmentList implementation");
#endif
stream.SegmentInfoType = MediaStream.SegmentInformationType.List;
}
else
{
#if DEBUG
Logger.Log("Manifest parsing error: " + "Does not support a SegmentBase or BaseUrl implementation");
#endif
stream.SegmentInfoType = MediaStream.SegmentInformationType.Base;
}
dashPeriod.AddStream(stream);
} // each adaptation set
manifest.AddPeriod(dashPeriod);
}// each period
manifest.SetFirstSelectedPeriod();
}
catch (Exception e)
{
#if DEBUG
Logger.Log("Manifest parsing error " + Logger.Display(e));
#endif
return(false);
}
return(true);
}
