public static TimeSpan ReturnTimeSpanOnGOP(ManifestTimingData data, TimeSpan ts)
{
var retVal = ts;
ulong timestamp = (ulong)(ts.TotalSeconds * data.TimeScale);
int i = 0;
foreach (var t in data.TimestampList)
{
if (t < timestamp && i < (data.TimestampList.Count - 1) && timestamp < data.TimestampList[i + 1])
{
retVal = TimeSpan.FromSeconds((double)t / (double)data.TimeScale);
break;
}
i++;
}
return(retVal);
}
public static ManifestTimingData GetManifestTimingData(IAsset asset, TraceWriter log)
{
ManifestTimingData response = new ManifestTimingData()
{
IsLive = false, Error = false, TimestampOffset = 0, TimestampList = new List <ulong>()
};
try
{
ILocator mytemplocator = null;
Uri myuri = FaceHelper.GetValidOnDemandURI(asset);
if (myuri == null)
{
mytemplocator = CreatedTemporaryOnDemandLocator(asset);
myuri = FaceHelper.GetValidOnDemandURI(asset);
}
if (myuri != null)
{
XDocument manifest = XDocument.Load(myuri.ToString());
var smoothmedia = manifest.Element("SmoothStreamingMedia");
var videotrack = smoothmedia.Elements("StreamIndex").Where(a => a.Attribute("Type").Value == "video");
string timescalefrommanifest = smoothmedia.Attribute("TimeScale").Value;
if (videotrack.FirstOrDefault().Attribute("TimeScale") != null) // there is timescale value in the video track. Let's take this one.
{
timescalefrommanifest = videotrack.FirstOrDefault().Attribute("TimeScale").Value;
}
ulong timescale = ulong.Parse(timescalefrommanifest);
response.TimeScale = (ulong?)timescale;
if (videotrack.FirstOrDefault().Element("c").Attribute("t") != null)
{
response.TimestampOffset = ulong.Parse(videotrack.FirstOrDefault().Element("c").Attribute("t").Value);
}
else
{
response.TimestampOffset = 0; // no timestamp, so it should be 0
}
ulong totalduration = 0;
ulong durationpreviouschunk = 0;
ulong durationchunk;
int repeatchunk;
foreach (var chunk in videotrack.Elements("c"))
{
durationchunk = chunk.Attribute("d") != null?ulong.Parse(chunk.Attribute("d").Value) : 0;
repeatchunk = chunk.Attribute("r") != null?int.Parse(chunk.Attribute("r").Value) : 1;
totalduration += durationchunk * (ulong)repeatchunk;
if (chunk.Attribute("t") != null)
{
//totalduration = ulong.Parse(chunk.Attribute("t").Value) - response.TimestampOffset; // new timestamp, perhaps gap in live stream....
response.TimestampList.Add(ulong.Parse(chunk.Attribute("t").Value));
}
else
{
response.TimestampList.Add(response.TimestampList[response.TimestampList.Count() - 1] + durationpreviouschunk);
}
for (int i = 1; i < repeatchunk; i++)
{
response.TimestampList.Add(response.TimestampList[response.TimestampList.Count() - 1] + durationchunk);
}
durationpreviouschunk = durationchunk;
}
response.TimestampEndLastChunk = response.TimestampList[response.TimestampList.Count() - 1] + durationpreviouschunk;
if (smoothmedia.Attribute("IsLive") != null && smoothmedia.Attribute("IsLive").Value == "TRUE")
{ // Live asset.... No duration to read (but we can read scaling and compute duration if no gap)
response.IsLive = true;
response.AssetDuration = TimeSpan.FromSeconds((double)totalduration / ((double)timescale));
}
else
{
totalduration = ulong.Parse(smoothmedia.Attribute("Duration").Value);
response.AssetDuration = TimeSpan.FromSeconds((double)totalduration / ((double)timescale));
}
}
else
{
response.Error = true;
}
if (mytemplocator != null)
{
mytemplocator.Delete();
}
}
catch (Exception)
{
response.Error = true;
}
return(response);
}
