} // WaitCompletion
public void Dispose()
{
if (SegmentsQueue == null)
{
return;
}
SegmentsQueue = null;
EnqueuedSegments.Dispose();
ProcessSegmentsEnded.Dispose();
Datastore = null;
} // Dispose
public void Start(EpgDatastore datastore)
{
if (SegmentsQueue != null)
{
throw new InvalidOperationException();
}
SegmentsQueue = new ConcurrentQueue <byte[]>();
EnqueuedSegments = new AutoResetEvent(false);
ProcessSegmentsEnded = new AutoResetEvent(false);
NoMoreSegments = false;
Datastore = datastore;
var worker = new Thread(ProcessSegments);
worker.Start();
} // Start
} // StartAsync
private void Download()
{
var retryIncrement = new TimeSpan(0, 0, 5);
var retryTime = new TimeSpan(0, 0, 0);
var maxRetryTime = new TimeSpan(0, 1, 0);
try
{
Processor = new SegmentsProcessor();
// initialize DVB-STP client
StreamClient = new DvbStpStreamClient(MulticastIpAddress, MulticastPort);
StreamClient.NoDataTimeout = -1; // not implemented by DvbStpStreamClient
StreamClient.ReceiveDatagramTimeout = 60 * 1000; // 60 seconds
StreamClient.OperationTimeout = -1; // forever
StreamClient.SegmentPayloadReceived += SegmentPayloadReceived;
while (retryTime <= maxRetryTime)
{
var retry = false;
try
{
Processor.Start(Datastore);
StreamClient.DownloadStream();
break;
}
catch (SocketException) // reception error
{
retry = true;
}
catch (TimeoutException) // reception timedout
{
// took too much time to process the stream
}// try-catch
// Safety check. If we asked to stop the download, but an exception is thrown in between,
// we can ignore it and end the reception;
if (StreamClient.CancelRequested)
{
break;
}
if (retry)
{
// wait and then retry, increasing wait time
retryTime += retryIncrement;
Thread.Sleep(retryTime);
continue;
} // if
} // while
Processor.WaitCompletion();
}
finally
{
if (StreamClient != null)
{
StreamClient.Close();
StreamClient = null;
} // if
if (Processor != null)
{
Processor.Dispose();
Processor = null;
} // if
Datastore = null;
} // try-finally
} // Download
} // constructor
public async Task StartAsync(EpgDatastore datastore)
{
Datastore = datastore;
await Task.Run((Action)Download);
} // StartAsync