/// <summary>
/// Cleans up all associated streaming resources.
/// </summary>
private void CleanupAudioStream()
{
var tempStream = this.audioStream;
this.audioStream = null;
if (tempStream != null)
{
tempStream.Closed += (s, e) =>
{
this.OnClosed();
};
tempStream.Dispose();
}
}
/// <summary>
/// Parses the passed in MediaStream to find the first frame and signals
/// to its parent MediaElement that it is ready to begin playback by calling
/// ReportOpenMediaCompleted.
/// </summary>
protected override void OpenMediaAsync()
{
System.Diagnostics.Debug.WriteLine(System.Threading.Thread.CurrentThread.ManagedThreadId.ToString() + ": OpenMediaAsync()");
// So, here is why this is a little weird.
// The Shoutcast server software has the ability to provide web pages. These pages just happen to be served from the SAME address as the media stream.
// Putting a "/;" at the end of the Uri will tell the Shoutcast server that we aren't a web browser, so stream the data. The problem is that not ALL
// Shoutcast servers are configured that way. So, we have to do a request to get the content type. If it is text/html, we append the "/;" and move on.
// If it is an empty string, 99.9% of the time, this will be the media stream (If it's an ICY stream, the ICY "headers" don't parse properly). The ShoutcastStream
// will handle this case, so we let it go through.
HttpWebRequest contentTypeRequest = ShoutcastMediaStreamSource.CreateHttpWebRequest(this.StreamUri, this.IncludeMetadata);
contentTypeRequest.BeginGetResponse(
ia1 =>
{
HttpWebRequest req1 = ia1.AsyncState as HttpWebRequest;
try
{
HttpWebResponse res1 = (HttpWebResponse)req1.EndGetResponse(ia1);
string contentType = res1.ContentType;
if ((contentType == string.Empty) || (contentType == "audio/mpeg"))
{
try
{
this.audioStream = new ShoutcastStream(this, res1);
this.audioStreamDescription = this.audioStream.AudioStreamDescription;
this.ReportOpenMediaCompleted(this.audioStream.AudioSourceAttributes, new MediaStreamDescription[] { this.audioStream.AudioStreamDescription });
}
catch (Exception ex)
{
this.CleanupAudioStream();
this.ErrorOccurred(ex.Message);
}
}
else
{
// Close the original response. We need another one.
res1.Close();
res1 = null;
if (!this.StreamUri.OriginalString.EndsWith("/", StringComparison.Ordinal))
{
this.StreamUri = new Uri(this.StreamUri.OriginalString + "/;", UriKind.Absolute);
}
else
{
this.StreamUri = new Uri(this.StreamUri.OriginalString + ";", UriKind.Absolute);
}
HttpWebRequest streamRequest = ShoutcastMediaStreamSource.CreateHttpWebRequest(this.StreamUri, this.IncludeMetadata);
streamRequest.BeginGetResponse(
ia =>
{
HttpWebRequest req = ia.AsyncState as HttpWebRequest;
try
{
HttpWebResponse res = (HttpWebResponse)req.EndGetResponse(ia);
this.audioStream = new ShoutcastStream(this, res);
this.audioStreamDescription = this.audioStream.AudioStreamDescription;
this.ReportOpenMediaCompleted(this.audioStream.AudioSourceAttributes, new MediaStreamDescription[] { this.audioStream.AudioStreamDescription });
}
catch (Exception ex)
{
if (res1 != null)
{
res1.Close();
}
this.CleanupAudioStream();
this.ErrorOccurred(ex.Message);
}
},
streamRequest);
}
}
catch (Exception ex)
{
this.CleanupAudioStream();
this.ErrorOccurred(ex.Message);
}
},
contentTypeRequest);
}