/// <summary>
/// Wechselt die Quellgruppe.
/// </summary>
/// <param name="token">Die Informationen zur neuen Quellgruppe.</param>
/// <returns>Meldet, wie die Bearbeitung fortgesetzt werden soll.</returns>
private PipelineResult SetTuneRequest(TuneToken token)
{
// Ignore termination
if (token == null)
{
return(PipelineResult.Continue);
}
// Connect the request to the network provider
using (var provider = NetworkProvider.MarshalToManaged())
((ITuner)provider.Object).TuneRequest = token.TuneRequest;
// Now run post processings
return(PipelineResult.Continue);
}
/// <summary>
/// Sendet eine leere Anfrage zum Wechsel der Quellgruppe. Diese kann von allen Aktionen
/// verwendet werden, um interne Zustände zu (re-)initialisieren.
/// </summary>
/// <param name="disableDecryptionReset">Gesetzt, um die Neuinitialisierung der Entschlüsselung
/// zu deaktivieren.</param>
private void SendEmptyTuneRequest(bool disableDecryptionReset = false)
{
// Process
using (var tune = TuneToken.Create(TunePipeline, null, null))
tune.Execute();
if (!disableDecryptionReset)
{
using (var crypt = DecryptToken.Create(DecryptionPipeline, null))
crypt.Execute();
}
using (var sig = SignalToken.Create(SignalPipeline))
sig.Execute();
// Reset
m_currentDecryption = s_NoSources;
}
/// <summary>
/// Wählt eine neue Quellgruppe aus.
/// </summary>
/// <param name="location">Der Ursprung, über den die Quellgruppe empfangen wird.</param>
/// <param name="group">Die gewünschte Quellgruppe.</param>
/// <exception cref="NotSupportedException">Der Graph wurde noch nicht erzeugt.</exception>
public void Tune(GroupLocation location, SourceGroup group)
{
// Validate
if (NetworkProvider == null)
{
throw new NotSupportedException(Properties.Resources.Exception_NotStarted);
}
// PAT wait configuration - will use 1/10sec per retry
var patRetries = Configuration.MinimumPATCountWaitTime;
var patsExpected = Configuration.MinimumPATCount;
// Attach to helper
var analyser = TransportStreamAnalyser;
var manager = (analyser == null) ? null : analyser.DataManager;
var parser = (manager == null) ? null : manager.TSParser;
// May want to retry at least four times
for (var outerRetry = 4; outerRetry-- > 0; patsExpected += 5, patRetries += 25)
{
// Always stop raw dump
if (manager != null)
{
manager.StopDump();
}
// Report
if (BDASettings.BDATraceSwitch.Enabled)
{
Trace.WriteLine(string.Format(Properties.Resources.Trace_TuneStart, location, group), BDASettings.BDATraceSwitch.DisplayName);
}
// Route request through the current pipeline
using (var tune = TuneToken.Create(TunePipeline, location, group))
tune.Execute();
// Not yet up
if (analyser == null)
{
return;
}
// Attach to statistics interface
var statistics = TunerFilter.GetSignalStatistics();
if (statistics != null)
{
try
{
// Set counter
var tuneRetry = 10;
// Wait
for (; tuneRetry-- > 0; Thread.Sleep(100))
{
// Load the signal information
var locked = statistics.SignalLocked;
if (locked != 0)
{
break;
}
}
// Report
if (BDASettings.BDATraceSwitch.Enabled)
{
Trace.WriteLine(string.Format(Properties.Resources.Trace_Lock, 10 - tuneRetry, tuneRetry, BDASettings.FastTune), BDASettings.BDATraceSwitch.DisplayName);
}
// Final check
if (BDASettings.FastTune)
{
if (statistics.SignalLocked == 0)
{
return;
}
}
}
catch
{
// Just ignore any error
}
finally
{
// Back to COM
BDAEnvironment.Release(ref statistics);
}
}
// Check for dump
StartDump();
// Reset PAT detection
parser.RestartPATCounter();
// Request the number of bytes currently processed
var bytes = parser.BytesReceived;
var limit = patsExpected;
var retry = patRetries;
// Wait a bit
for (; (parser.ValidPATCount < limit) && (retry-- > 0);)
{
Thread.Sleep(100);
}
// Report
if (BDASettings.BDATraceSwitch.Enabled)
{
Trace.WriteLine(string.Format(Properties.Resources.Trace_StreamOk, patRetries - retry, retry, parser.ValidPATCount, parser.BytesReceived - bytes), BDASettings.BDATraceSwitch.DisplayName);
}
// Disable retry if PATs are received
if (parser.ValidPATCount >= limit)
{
break;
}
// Disable retry if no data is on the transponder
if (bytes == parser.BytesReceived)
{
if (outerRetry != 3)
{
break;
}
}
// Report for debugging purposes
if (BDASettings.BDATraceSwitch.Enabled)
{
Trace.WriteLine(Properties.Resources.Trace_TuneFailed, BDASettings.BDATraceSwitch.DisplayName);
}
// Inform all helpers on reset
SendEmptyTuneRequest(DisableCIResetOnTuneFailure);
}
}
