public bool Equals(MediaDescription other)
{
return(EnumerableExtensions.SequenceEquals(this, other));
//using (var one = other.GetEnumerator())
//{
// using (var two = GetEnumerator())
// {
// while (one.MoveNext() && two.MoveNext())
// {
// if (one.Current.Equals(two.Current).Equals(false)) return false;
// }
// return true;
// }
//}
}
public static TimeDescription GetTimeDescription(this MediaDescription mediaDescription, SessionDescription sessionDescription)
{
if (IDisposedExtensions.IsNullOrDisposed(mediaDescription) || IDisposedExtensions.IsNullOrDisposed(sessionDescription))
{
return(null);
}
//Get index of mediaDescription
//Needs a better way to get the index of the media description
int index = sessionDescription.GetIndexFor(mediaDescription); //Array.IndexOf(sessionDescription.MediaDescriptions.ToArray(), mediaDescription);
if (index == -1)
{
return(null);
}
return(sessionDescription.GetTimeDescription(index));
}
//Should have a date when or should return the date playable, which would then be used by another method to compare against a time.
public static bool IsPlayable(this MediaDescription mediaDescription, SessionDescription sessionDescription) //, DateTime? check = null) ,TimeSpan within = TimeSpan.Zero
{
if (IDisposedExtensions.IsNullOrDisposed(mediaDescription) || IDisposedExtensions.IsNullOrDisposed(sessionDescription))
{
return(false);
}
//Get index of mediaDesription
//Check TimeDescription @ index.
TimeDescription td = GetTimeDescription(mediaDescription, sessionDescription);
//Assume true
if (IDisposedExtensions.IsNullOrDisposed(td))
{
return(true);
}
//Unbound start and end ?
if (td.IsPermanent)
{
return(true);
}
//Notes multiple calls to UtcNow... (avoid with a within parameter)?
try
{
//Ensure not a bounded end and that the end time is less than now
if (false.Equals(td.StopTime.Equals(0))
&&
td.NtpStopDateTime >= DateTime.UtcNow)
{
return(false);
}
//Ensure start time is not bounded and that the start time is greater than now
if (false.Equals(td.StartTime.Equals(0))
&&
td.NtpStartDateTime > DateTime.UtcNow)
{
return(false);
}
//Check repeat times.
//td.RepeatTimes;
}
catch
{
//Out of range values for conversion, assume true if end is unbounded
if (false.Equals(td.StopTime.Equals(0)))
{
return(false);
}
}
finally
{
td = null;
}
return(true);
}
/// <summary>
/// Parses the <see cref="MediaDescription.ControlLine"/> and if present
/// </summary>
/// <param name="mediaDescription"></param>
/// <param name="source"></param>
/// <returns></returns>
public static Uri GetAbsoluteControlUri(this MediaDescription mediaDescription, Uri source, SessionDescription sessionDescription = null)
{
if (object.ReferenceEquals(source, null))
{
throw new ArgumentNullException("source");
}
if (IDisposedExtensions.IsNullOrDisposed(mediaDescription))
{
return(source);
}
if (source.IsAbsoluteUri.Equals(false))
{
throw new InvalidOperationException("source.IsAbsoluteUri must be true.");
}
SessionDescriptionLine controlLine = mediaDescription.ControlLine;
//If there is a control line in the SDP it contains the URI used to setup and control the media
if (object.ReferenceEquals(controlLine, null).Equals(false))
{
//Todo, make typed line for controlLine
string controlPart = controlLine.Parts.Last(); //controlLine.Parts.Where(p => p.StartsWith(AttributeFields.Control)).FirstOrDefault();
//If there is a controlPart in the controlLine
if (string.IsNullOrWhiteSpace(controlPart).Equals(false))
{
//Prepare the part
controlPart = controlPart.Split(Media.Sdp.SessionDescription.ColonSplit, 2, StringSplitOptions.RemoveEmptyEntries).Last();
//Create a uri
Uri controlUri = new Uri(controlPart, UriKind.RelativeOrAbsolute);
//Determine if its a Absolute Uri
if (controlUri.IsAbsoluteUri)
{
return(controlUri);
}
//Return a new uri using the original string and the controlUri relative path.
//Hopefully the direction of the braces matched..
//string.Join(source.OriginalString, controlUri.OriginalString);
return(new Uri(source.OriginalString.EndsWith(SessionDescription.ForwardSlashString) ? source.OriginalString + controlUri.OriginalString : string.Join(SessionDescription.ForwardSlashString, source.OriginalString, controlUri.OriginalString)));
//Todo, ensure that any parameters have also been restored...
#region Explination
//I wonder if Mr./(Dr) Fielding is happy...
//Let source =
//rtsp://alt1.v7.cache3.c.youtube.com/CigLENy73wIaHwmddh2T-s8niRMYDSANFEgGUgx1c2VyX3VwbG9hZHMM/0/0/0/1/video.3gp/trackID=0
//Call
//return new Uri(source, controlUri);
//Result =
//rtsp://alt1.v7.cache3.c.youtube.com/CigLENy73wIaHwmddh2T-s8niRMYDSANFEgGUgx1c2VyX3VwbG9hZHMM/0/0/0/1/trackID=0
//Useless when the source doesn't end with '/', e.g. same problem with Uri constructor.
//System.UriBuilder builder = new UriBuilder(source);
//builder.Path += controlUri.ToString();
//"rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov/trackID=1"
#endregion
}
}
//Try to take the session level control uri
Uri sessionControlUri;
//If there was a session description given and it supports aggregate media control then return that uri
if (IDisposedExtensions.IsNullOrDisposed(sessionDescription).Equals(false) && sessionDescription.SupportsAggregateMediaControl(out sessionControlUri, source))
{
return(sessionControlUri);
}
//There is no control line, just return the source.
return(source);
}
