/// <summary>
/// Completely shuts down the AudioTrackStreamer.
/// </summary>
public static void ShutdownMediaStreamSource()
{
if (AudioTrackStreamer.mss != null)
{
lock (AudioTrackStreamer.syncRoot)
{
if (AudioTrackStreamer.mss != null)
{
// Because of the NotifyComplete(), we need to set this BEFORE the MSS ends.
ShoutcastMediaStreamSource temp = AudioTrackStreamer.mss;
AudioTrackStreamer.mss = null;
temp.MetadataChanged -= new System.Windows.RoutedEventHandler(AudioTrackStreamer.MetadataChanged);
temp.Dispose();
}
}
}
}
/// <summary>
/// Called when a new track requires audio decoding
/// (typically because it is about to start playing)
/// </summary>
/// <param name="track">
/// The track that needs audio streaming
/// </param>
/// <param name="streamer">
/// The AudioStreamer object to which a MediaStreamSource should be
/// attached to commence playback
/// </param>
/// <remarks>
/// To invoke this method for a track set the Source parameter of the AudioTrack to null
/// before setting into the Track property of the BackgroundAudioPlayer instance
/// property set to true;
/// otherwise it is assumed that the system will perform all streaming
/// and decoding
/// </remarks>
protected override void OnBeginStreaming(AudioTrack track, AudioStreamer streamer)
{
lock (AudioTrackStreamer.syncRoot)
{
try
{
AudioTrackStreamer.mss = new ShoutcastMediaStreamSource(new Uri(track.Tag));
AudioTrackStreamer.mss.MetadataChanged += new RoutedEventHandler(AudioTrackStreamer.MetadataChanged);
AudioTrackStreamer.mss.Closed += (s, e) =>
{
this.NotifyComplete();
};
streamer.SetSource(AudioTrackStreamer.mss);
}
catch (Exception ex)
{
Debug.WriteLine("----------===============");
Debug.WriteLine("OnBeginStreaming:" + ex);
}
}
}
/// <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") || contentType == "audio/x-mpegurl")
{
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);
}
/// <summary>
/// Initializes a new instance of the ShoutcastStream class.
/// </summary>
/// <param name="mediaStreamSource">ShoutcastMediaStreamSource containing this ShoutcastStream.</param>
/// <param name="httpWebResponse">HttpWebResponse for MP3 stream request.</param>
/// <param name="numberOfSecondsToBuffer">Number of seconds of audio data to buffer.</param>
/// <param name="metadataEncoding">Text encoding used to decode the Shoutcast metadata.</param>
public ShoutcastStream(ShoutcastMediaStreamSource mediaStreamSource, HttpWebResponse httpWebResponse, int numberOfSecondsToBuffer, Encoding metadataEncoding)
{
System.Diagnostics.Debug.WriteLine(System.Threading.Thread.CurrentThread.ManagedThreadId.ToString() + ": ShoutcastStream() ctor");
if (mediaStreamSource == null)
{
throw new ArgumentNullException("mediaStreamSource");
}
if (httpWebResponse == null)
{
throw new ArgumentNullException("httpWebResponse");
}
if (metadataEncoding == null)
{
throw new ArgumentNullException("encoding");
}
this.mediaStreamSource = mediaStreamSource;
this.includeMetadata = this.mediaStreamSource.IncludeMetadata;
this.numberOfSecondsToBuffer = numberOfSecondsToBuffer;
this.metadataEncoding = metadataEncoding;
// If the request is bad, this will die first, so we can just not worry about it.
this.innerStream = httpWebResponse.GetResponseStream();
try
{
// Read a chunk of data, but likely one smaller than the circular buffer size.
byte[] initialBuffer = new byte[ShoutcastStream.DefaultInitialBufferSize];
// Make sure we have enough data to work with initially
int bytesRead = this.ForceReadFromStream(initialBuffer, 0, initialBuffer.Length);
if (bytesRead == 0)
{
// Should this be -1?
// This means there was something wrong with the stream.
throw new InvalidOperationException("Zero initial bytes read from stream.");
}
this.MediaInformation = this.FindStreamInformation(httpWebResponse, ref initialBuffer);
if (this.MediaInformation == null)
{
throw new ArgumentException("Invalid MediaInformation");
}
this.icyMetadata = this.MediaInformation.MetadataInterval;
this.ParseInitialBuffer(initialBuffer);
}
catch (Exception)
{
// No matter what, we need to shut down!
if (this.innerStream != null)
{
this.innerStream.Dispose();
this.innerStream = null;
}
// Rethrow
throw;
}
this.backgroundWorker = new BackgroundWorker()
{
WorkerReportsProgress = false,
WorkerSupportsCancellation = true
};
this.backgroundWorker.DoWork += new DoWorkEventHandler(this.DoWork);
this.backgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(this.RunWorkerCompleted);
this.backgroundWorker.RunWorkerAsync(this.innerStream);
}
/// <summary>
/// Initializes a new instance of the ShoutcastStream class.
/// </summary>
/// <param name="mediaStreamSource">ShoutcastMediaStreamSource containing this ShoutcastStream.</param>
/// <param name="httpWebResponse">HttpWebResponse for MP3 stream request.</param>
/// <param name="numberOfSecondsToBuffer">Number of seconds of audio data to buffer.</param>
public ShoutcastStream(ShoutcastMediaStreamSource mediaStreamSource, HttpWebResponse httpWebResponse, int numberOfSecondsToBuffer)
: this(mediaStreamSource, httpWebResponse, numberOfSecondsToBuffer, Encoding.UTF8)
{
}
/// <summary>
/// Initializes a new instance of the ShoutcastStream class.
/// </summary>
/// <param name="mediaStreamSource">ShoutcastMediaStreamSource containing this ShoutcastStream.</param>
/// <param name="httpWebResponse">HttpWebResponse for MP3 stream request.</param>
public ShoutcastStream(ShoutcastMediaStreamSource mediaStreamSource, HttpWebResponse httpWebResponse)
: this(mediaStreamSource, httpWebResponse, ShoutcastStream.DefaultSecondsToBuffer)
{
}