private async Task <M3U8Parser> FetchPlaylistAsync(CancellationToken cancellationToken)
{
var urls = Urls;
if (urls == null || urls.Count < 1)
{
return(null);
}
foreach (Uri playlist in urls)
{
UpdateSubPlaylistCache(playlist);
cancellationToken.ThrowIfCancellationRequested();
WebResponse webResponse = null;
if (null == StreamMetadata)
{
webResponse = new WebResponse();
}
var parsedPlaylist = await _subPlaylistCache.ReadAsync((actualUri, bytes) =>
{
cancellationToken.ThrowIfCancellationRequested();
if (bytes.Length < 1)
{
return(null);
}
var parser = new M3U8Parser();
using (var memoryStream = new MemoryStream(bytes))
{
parser.Parse(actualUri, memoryStream);
}
return(parser);
}, cancellationToken, webResponse).ConfigureAwait(false);
if (null != parsedPlaylist)
{
if (null != webResponse)
{
StreamMetadata = _webMetadataFactory.CreateStreamMetadata(webResponse);
}
return(parsedPlaylist);
}
}
return(null);
}
private Task OpenStream(Action <ISegmentMetadata> setMetadata, CancellationToken cancellationToken)
{
this.ThrowIfDisposed();
WebResponse webResponse = new WebResponse();
IRetry retry = this._retryManager.CreateRetry(2, 200, new Func <Exception, bool>(RetryPolicy.IsWebExceptionRetryable));
return(RetryExtensions.CallAsync(retry, (Func <Task>)(async() =>
{
long?nullable1;
long?nullable2;
while (true)
{
if (this._startOffset.HasValue && this._endOffset.HasValue)
{
nullable1 = this._endOffset;
nullable2 = this._startOffset;
nullable1 = nullable1.HasValue & nullable2.HasValue ? new long?(nullable1.GetValueOrDefault() - nullable2.GetValueOrDefault()) : new long?();
long?nullable3;
if (!nullable1.HasValue)
{
nullable2 = new long?();
nullable3 = nullable2;
}
else
{
nullable3 = new long?(nullable1.GetValueOrDefault() + 1L);
}
this._expectedBytes = nullable3;
}
else
{
this._expectedBytes = new long?();
}
this._response = await this._webReader.GetWebStreamAsync(this._actualUrl ?? this._segment.Url, false, cancellationToken, this._segment.ParentUrl, this._startOffset, this._endOffset, webResponse).ConfigureAwait(false);
if (!this._response.IsSuccessStatusCode)
{
HttpStatusCode statusCode = (HttpStatusCode)this._response.HttpStatusCode;
if (HttpStatusCode.NotFound != statusCode && !RetryPolicy.IsRetryable(statusCode))
{
this._response.EnsureSuccessStatusCode();
}
bool canRetry = await retry.CanRetryAfterDelayAsync(cancellationToken).ConfigureAwait(false);
if (!canRetry)
{
if ((Uri)null != this._actualUrl && this._actualUrl != this._segment.Url)
{
this._actualUrl = (Uri)null;
}
else
{
this._response.EnsureSuccessStatusCode();
}
}
this._response.Dispose();
this._response = (IWebStreamResponse)null;
}
else
{
break;
}
}
this._actualUrl = this._response.ActualUrl;
long?contentLength = this._response.ContentLength;
if (!this._endOffset.HasValue)
{
nullable1 = contentLength;
long?nullable3;
if (!nullable1.HasValue)
{
nullable2 = new long?();
nullable3 = nullable2;
}
else
{
nullable3 = new long?(nullable1.GetValueOrDefault() - 1L);
}
this._endOffset = nullable3;
}
if (!this._expectedBytes.HasValue)
{
this._expectedBytes = contentLength;
}
SegmentReader segmentReader1 = this;
ConfiguredTaskAwaitable <Stream> configuredTaskAwaitable = this._response.GetStreamAsync(cancellationToken).ConfigureAwait(false);
PositionStream positionStream = new PositionStream(await configuredTaskAwaitable);
segmentReader1._responseStream = (Stream)positionStream;
Task <Stream> filterStreamTask = this._segment.CreateFilterAsync(this._responseStream, cancellationToken);
if (null != filterStreamTask)
{
SegmentReader segmentReader2 = this;
configuredTaskAwaitable = filterStreamTask.ConfigureAwait(false);
Stream stream = await configuredTaskAwaitable;
segmentReader2._readStream = stream;
}
else
{
this._readStream = this._responseStream;
}
ISegmentMetadata segmentMetadata = this._webMetadataFactory.CreateSegmentMetadata(webResponse, (ContentType)null);
setMetadata(segmentMetadata);
}), cancellationToken));
}
private async Task SimplePlayAsync(ContentType contentType, IWebReader webReader, IWebStreamResponse webStreamResponse, WebResponse webResponse, TaskCompletionSource <bool> configurationTaskCompletionSource, CancellationToken cancellationToken)
{
try
{
this._mediaStreamConfigurator.Initialize();
this._mediaStreamConfigurator.MediaManager = (IMediaManager)this;
IMediaParser mediaParser = await this._mediaParserFactory.CreateAsync((IMediaParserParameters) new MediaParserParameters(), contentType, cancellationToken).ConfigureAwait(false);
if (null == mediaParser)
{
throw new NotSupportedException("Unsupported content type: " + (object)contentType);
}
this.State = MediaManagerState.Opening;
EventHandler configurationComplete = (EventHandler)null;
configurationComplete = (EventHandler)((sender, args) =>
{
mediaParser.ConfigurationComplete -= configurationComplete;
configurationTaskCompletionSource.TrySetResult(true);
});
mediaParser.ConfigurationComplete += configurationComplete;
using (IBufferingManager bufferingManager = this._bufferingManagerFactory())
{
SingleStreamMediaManager.QueueThrottle throttle = new SingleStreamMediaManager.QueueThrottle();
bufferingManager.Initialize((IQueueThrottling)throttle, new Action(this._mediaStreamConfigurator.CheckForSamples));
mediaParser.Initialize(bufferingManager, (Action <IProgramStreams>)null);
IStreamMetadata streamMetadata = this._webMetadataFactory.CreateStreamMetadata(webResponse, (ContentType)null);
mediaParser.InitializeStream(streamMetadata);
Task reader = (Task)null;
try
{
using (webReader)
{
try
{
if (null == webStreamResponse)
{
webStreamResponse = await webReader.GetWebStreamAsync((Uri)null, false, cancellationToken, (Uri)null, new long?(), new long?(), webResponse).ConfigureAwait(false);
}
reader = this.ReadResponseAsync(mediaParser, webStreamResponse, webResponse, throttle, cancellationToken);
Task task = await TaskEx.WhenAny((Task)configurationTaskCompletionSource.Task, CancellationTokenExtensions.AsTask(cancellationToken)).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
await MediaStreamSourceExtensions.PlayAsync(this._mediaStreamConfigurator, (IEnumerable <IMediaParserMediaStream>) mediaParser.MediaStreams, new TimeSpan?(), cancellationToken).ConfigureAwait(false);
this.State = MediaManagerState.Playing;
await reader.ConfigureAwait(false);
reader = (Task)null;
}
finally
{
if (null != webStreamResponse)
{
webStreamResponse.Dispose();
}
}
}
}
catch (OperationCanceledException ex)
{
}
catch (Exception ex)
{
string message = ExceptionExtensions.ExtendedMessage(ex);
Debug.WriteLine("SingleStreamMediaManager.SimplePlayAsync() failed: " + message);
this.SetMediaState(MediaManagerState.Error, message);
}
this.State = MediaManagerState.Closing;
if (null != reader)
{
try
{
await reader.ConfigureAwait(false);
}
catch (OperationCanceledException ex)
{
}
catch (Exception ex)
{
Debug.WriteLine("SingleStreamMediaManager.SimplePlayAsync() reader failed: " + ExceptionExtensions.ExtendedMessage(ex));
}
}
mediaParser.ConfigurationComplete -= configurationComplete;
mediaParser.EnableProcessing = false;
mediaParser.FlushBuffers();
bufferingManager.Flush();
bufferingManager.Shutdown((IQueueThrottling)throttle);
await this._mediaStreamConfigurator.CloseAsync().ConfigureAwait(false);
}
}
catch (Exception ex)
{
Debug.WriteLine("SingleStreamMediaManager.SimplePlayAsync() cleanup failed: " + ExceptionExtensions.ExtendedMessage(ex));
}
this._mediaStreamConfigurator.MediaManager = (IMediaManager)null;
if (!configurationTaskCompletionSource.Task.IsCompleted)
{
configurationTaskCompletionSource.TrySetCanceled();
}
this.State = MediaManagerState.Closed;
await this._reportStateTask.WaitAsync().ConfigureAwait(false);
}
private async Task ReadResponseAsync(IMediaParser mediaParser, IWebStreamResponse webStreamResponse, WebResponse webResponse, SingleStreamMediaManager.QueueThrottle throttle, CancellationToken cancellationToken)
{
byte[] buffer = new byte[16384];
Task cancellationTask = CancellationTokenExtensions.AsTask(cancellationToken);
try
{
ISegmentMetadata segmentMetadata = this._webMetadataFactory.CreateSegmentMetadata(webResponse, (ContentType)null);
mediaParser.StartSegment(segmentMetadata);
using (Stream stream = await webStreamResponse.GetStreamAsync(cancellationToken).ConfigureAwait(false))
{
while (true)
{
Task waitTask = throttle.WaitAsync();
if (!waitTask.IsCompleted)
{
Task task = await TaskEx.WhenAny(waitTask, cancellationTask).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
}
int length = await stream.ReadAsync(buffer, 0, buffer.Length, cancellationToken).ConfigureAwait(false);
if (length > 0)
{
mediaParser.ProcessData(buffer, 0, length);
}
else
{
break;
}
}
}
}
finally
{
mediaParser.ProcessEndOfData();
}
}
public async Task <IMediaStreamConfigurator> OpenMediaAsync(ICollection <Uri> source, CancellationToken cancellationToken)
{
this.State = MediaManagerState.OpenMedia;
WebResponse response = new WebResponse();
IMediaStreamConfigurator streamConfigurator;
using (IWebReader rootReader = WebReaderManagerExtensions.CreateRootReader(this._webReaderManager, (ContentType)null))
{
using (IEnumerator <Uri> enumerator = source.GetEnumerator())
{
label_25:
if (enumerator.MoveNext())
{
Uri url = enumerator.Current;
IWebReader webReader = (IWebReader)null;
IWebStreamResponse webStream = (IWebStreamResponse)null;
CancellationTokenSource playCancellationTokenSource = (CancellationTokenSource)null;
Task playTask = (Task)null;
try
{
webReader = WebReaderExtensions.CreateChild(rootReader, url, ContentKind.Unknown, this.ContentType);
webStream = await webReader.GetWebStreamAsync((Uri)null, false, cancellationToken, (Uri)null, new long?(), new long?(), response).ConfigureAwait(false);
if (webStream.IsSuccessStatusCode)
{
ContentType contentType = response.ContentType;
if (!((ContentType)null == contentType))
{
if ((ContentType)null == contentType || ContentKind.Playlist == contentType.Kind)
{
throw new FileNotFoundException("Content not supported with this media manager");
}
TaskCompletionSource <bool> configurationTaskCompletionSource = new TaskCompletionSource <bool>();
playCancellationTokenSource = new CancellationTokenSource();
CancellationTokenSource localPlayCancellationTokenSource = playCancellationTokenSource;
Task cancelPlayTask = configurationTaskCompletionSource.Task.ContinueWith((Action <Task <bool> >)(t =>
{
if (!t.IsFaulted && !t.IsCanceled)
{
return;
}
localPlayCancellationTokenSource.Cancel();
}));
TaskCollector.Default.Add(cancelPlayTask, "SingleStreamMediaManager play cancellation");
IWebReader localWebReader = webReader;
IWebStreamResponse localWebStream = webStream;
CancellationToken playCancellationToken = playCancellationTokenSource.Token;
playTask = TaskEx.Run((Func <Task>)(() => this.SimplePlayAsync(contentType, localWebReader, localWebStream, response, configurationTaskCompletionSource, playCancellationToken)), playCancellationToken);
bool lockTaken = false;
object obj = null;
try
{
Monitor.Enter(obj = this._lock, ref lockTaken);
this._playCancellationTokenSource = playCancellationTokenSource;
playCancellationTokenSource = (CancellationTokenSource)null;
this._playTask = playTask;
playTask = (Task)null;
}
finally
{
if (lockTaken)
{
Monitor.Exit(obj);
}
}
bool isConfigured = await configurationTaskCompletionSource.Task.ConfigureAwait(false);
if (isConfigured)
{
webReader = (IWebReader)null;
webStream = (IWebStreamResponse)null;
streamConfigurator = this._mediaStreamConfigurator;
goto label_33;
}
else
{
goto label_25;
}
}
else
{
goto label_25;
}
}
else
{
goto label_25;
}
}
finally
{
if (null != webStream)
{
webStream.Dispose();
}
if (null != webReader)
{
webReader.Dispose();
}
if (null != playCancellationTokenSource)
{
playCancellationTokenSource.Cancel();
}
if (null != playTask)
{
TaskCollector.Default.Add(playTask, "SingleStreamMediaManager play task");
}
}
}
}
}
throw new FileNotFoundException();
label_33:
return(streamConfigurator);
}
