private async void ReadSource()
{
Exception possibleError = null;
bool tryAgain = true;
while (tryAgain)
{
tryAgain = false;
currentAttemptStopwatch = null;
currentAttemptLastReceivedData = TimeSpan.Zero;
currentAttemptReceivedBytes = 0;
Stream sourceStream;
try
{
var response = await getResponse(this.availableBytes);
this.response.TrySetResult(response);
if (this.availableBytes == 0)
{
#if WEBCLIENT
size = response.ContentLength != -1 ? response.ContentLength : (long?)null;
#else
var ce = response.Content.Headers.ContentEncoding;
if (ce == null || !ce.Any())
{
size = response.Content.Headers.ContentLength;
}
#endif
}
if (availableBytes != 0)
{
#if WEBCLIENT
var cr = response.Headers["Content-Range"];
// HACK: trust the server to return the expected range
if (string.IsNullOrEmpty(cr))
#else
if (response.Content == null || response.Content.Headers.ContentRange == null || response.Content.Headers.ContentRange.From.GetValueOrDefault(-1) != availableBytes)
#endif
{
response.Dispose();
throw new NotSupportedException("The web server did not return the expected range of data.");
}
}
if (data == null)
{
response.Dispose();
return;
}
#if WEBCLIENT
sourceStream = await TaskEx.Run(() => response.GetResponseStream());
#else
sourceStream = await response.Content.ReadAsStreamAsync();
#endif
}
catch (Exception ex)
{
if (possibleError == null)
{
possibleError = ex;
}
break;
}
this.source = sourceStream;
var timedOut = false;
using (sourceStream)
using (var w = new Watchdog(Configuration_AudioReadTimeout, () => { timedOut = true; var s = sourceStream; if (s != null)
{
s.Dispose();
}
}))
{
while (true)
{
if (data == null)
{
return;
}
byte[] slot;
if (currentSlotFreeSpace == 0)
{
slot = new byte[SlotSize];
MaybeCleanupOldSlots();
currentSlotFreeSpace = SlotSize;
data.Add(slot);
}
else
{
slot = data[data.Count - 1];
}
int waitAndRetry = 0;
try
{
var readBytes = source.Read(slot,
SlotSize - currentSlotFreeSpace,
Math.Min(currentSlotFreeSpace, ReadGranularity));
w.Pulse();
if (currentAttemptStopwatch == null)
{
currentAttemptStopwatch = Stopwatch.StartNew();
}
currentAttemptLastReceivedData = currentAttemptStopwatch.Elapsed;
if (readBytes == 0)
{
completed = true;
CloseSource();
if (size.HasValue)
{
EnsureCorrectNumberOfBytes(availableBytes, size.Value);
}
size = availableBytes;
OnNewDataAvailable();
currentAttemptStopwatch.Stop();
return;
}
else
{
possibleError = null;
currentAttemptReceivedBytes += readBytes;
var modified = availableBytes + readBytes;
Interlocked.Exchange(ref availableBytes, modified);
currentSlotFreeSpace -= readBytes;
OnNewDataAvailable();
if (availableBytes >= Configuration_PrefetchLength && (consumers == 0 || availableBytes > maxRequestedByte + Configuration_NonRequestedDataLimit))
{
await TaskEx.Delay(1000 *readBytes / (consumers == 0 ? Configuration_AfterPrefetchIdleSpeed : Configuration_IdleMaxSpeed));
}
}
}
catch (Exception ex)
{
if (data == null)
{
return;
}
if (timedOut)
{
ex = new TimeoutException();
}
if (possibleError == null)
{
possibleError = ex;
}
if (currentAttemptStopwatch != null)
{
currentAttemptStopwatch.Stop();
}
if (currentAttemptReceivedBytes >= 1 * 1024 * 1024 && !(ex is InvalidDataException))
{
waitAndRetry = 2;
}
else
{
waitAndRetry = 1;
}
}
if (waitAndRetry != 0)
{
if (waitAndRetry == 2)
{
await TaskEx.Delay(ZeroSpeedAfterSilenceMilliseconds);
OnNewDataAvailable();
await TaskEx.Delay(10000 - ZeroSpeedAfterSilenceMilliseconds);
tryAgain = true;
}
break;
}
}
}
}
if (possibleError != null)
{
error = possibleError;
OnNewDataAvailable();
CloseSource();
}
}
private async void ReadSource()
{
Exception possibleError = null;
bool tryAgain = true;
while (tryAgain)
{
tryAgain = false;
currentAttemptStopwatch = null;
currentAttemptLastReceivedData = TimeSpan.Zero;
currentAttemptReceivedBytes = 0;
Stream sourceStream;
try
{
var response = await getResponse(this.availableBytes);
if (this.availableBytes == 0)
{
#if WEBCLIENT
size = response.ContentLength != -1 ? response.ContentLength : (long?)null;
#else
var ce = response.Content.Headers.ContentEncoding;
if (ce == null || !ce.Any())
size = response.Content.Headers.ContentLength;
#endif
}
if (availableBytes != 0)
{
#if WEBCLIENT
var cr = response.Headers["Content-Range"];
// HACK: trust the server to return the expected range
if (string.IsNullOrEmpty(cr))
#else
if (response.Content == null || response.Content.Headers.ContentRange == null || response.Content.Headers.ContentRange.From.GetValueOrDefault(-1) != availableBytes)
#endif
{
response.Dispose();
throw new NotSupportedException("The web server did not return the expected range of data.");
}
}
if (data == null)
{
response.Dispose();
return;
}
#if WEBCLIENT
sourceStream = await TaskEx.Run(() => response.GetResponseStream());
#else
sourceStream = await response.Content.ReadAsStreamAsync();
#endif
}
catch (Exception ex)
{
if (possibleError == null) possibleError = ex;
break;
}
this.source = sourceStream;
var timedOut = false;
using (sourceStream)
using (var w = new Watchdog(Configuration_AudioReadTimeout, () => { timedOut = true; var s = sourceStream; if (s != null) s.Dispose(); }))
{
while (true)
{
if (data == null) return;
byte[] slot;
if (currentSlotFreeSpace == 0)
{
slot = new byte[SlotSize];
MaybeCleanupOldSlots();
currentSlotFreeSpace = SlotSize;
data.Add(slot);
}
else
{
slot = data[data.Count - 1];
}
int waitAndRetry = 0;
try
{
var readBytes = source.Read(slot,
SlotSize - currentSlotFreeSpace,
Math.Min(currentSlotFreeSpace, ReadGranularity));
w.Pulse();
if (currentAttemptStopwatch == null)
{
currentAttemptStopwatch = Stopwatch.StartNew();
}
currentAttemptLastReceivedData = currentAttemptStopwatch.Elapsed;
if (readBytes == 0)
{
completed = true;
CloseSource();
if (size.HasValue) EnsureCorrectNumberOfBytes(availableBytes, size.Value);
size = availableBytes;
OnNewDataAvailable();
currentAttemptStopwatch.Stop();
return;
}
else
{
possibleError = null;
currentAttemptReceivedBytes += readBytes;
var modified = availableBytes + readBytes;
Interlocked.Exchange(ref availableBytes, modified);
currentSlotFreeSpace -= readBytes;
OnNewDataAvailable();
if (availableBytes >= Configuration_PrefetchLength && (consumers == 0 || availableBytes > maxRequestedByte + Configuration_NonRequestedDataLimit))
{
await TaskEx.Delay(1000 * readBytes / (consumers == 0 ? Configuration_AfterPrefetchIdleSpeed : Configuration_IdleMaxSpeed));
}
}
}
catch (Exception ex)
{
if (data == null) return;
if (timedOut) ex = new TimeoutException();
if (possibleError == null) possibleError = ex;
if (currentAttemptStopwatch != null) currentAttemptStopwatch.Stop();
if (currentAttemptReceivedBytes >= 1 * 1024 * 1024 && !(ex is InvalidDataException)) waitAndRetry = 2;
else waitAndRetry = 1;
}
if (waitAndRetry != 0)
{
if (waitAndRetry == 2)
{
await TaskEx.Delay(ZeroSpeedAfterSilenceMilliseconds);
OnNewDataAvailable();
await TaskEx.Delay(10000 - ZeroSpeedAfterSilenceMilliseconds);
tryAgain = true;
}
break;
}
}
}
}
if (possibleError != null)
{
error = possibleError;
OnNewDataAvailable();
CloseSource();
}
}
