/// <summary>
/// Stellt den Empfang auf eine bestimmte Quellgruppe eines Ursprungs ein.
/// </summary>
/// <remarks>Der Aufruf dieser Methode darf niemals auf mehreren Threads
/// gleichzeitig erfolgen.</remarks>
/// <param name="location">Der gewünschte Ursprung.</param>
/// <param name="group">Die gewünschte Quellgruppe.</param>
public void SelectGroup(GroupLocation location, SourceGroup group)
{
// Report
if (TunerTraceSwitch.Enabled)
{
Trace.WriteLine(string.Format(Properties.Resources.Trace_Tuner_Request, location, group), TunerTraceSwitch.DisplayName);
}
// Always use clones
location = location.CloneLocation();
group = group.CloneGroup();
// Stop all current
if ((CurrentLocation != null) || (CurrentGroup != null))
{
// Report
if (ConsumerTraceSwitch.Enabled)
{
Trace.WriteLine(Properties.Resources.Trace_Consumer_StoppingAll, ConsumerTraceSwitch.DisplayName);
}
// See if provide has a fast way to stop all streams
bool allStopped = OnStopAll();
// Stop all table readers
ResetReader(ref m_networkInformationReader);
ResetReader(ref m_associationReader);
ResetReader(ref m_serviceReader);
m_groupReader = null;
// Erase list of EPG receivers
m_programGuideConsumers = null;
// List of active consumers
StreamInformation[] consumers;
// Be safe
lock (InstanceSynchronizer)
{
// Remember
consumers = m_streamsByPID.Values.ToArray();
// Wipe out
m_streamsByPID.Clear();
m_streamsById.Clear();
}
// Forward to all streams
if (!allStopped)
{
foreach (var consumer in consumers)
{
if (consumer.ActiveConsumerCount > 0)
{
OnStop(consumer);
}
}
}
}
// See if something changed
if (!Equals(location, CurrentLocation) || !Equals(group, CurrentGroup))
{
// Report
if (TunerTraceSwitch.Enabled)
{
Trace.WriteLine(Properties.Resources.Trace_Tuner_Hardware, TunerTraceSwitch.DisplayName);
}
// Activate hardware
OnSelectGroup(location, group);
// Remember
CurrentLocation = location;
CurrentGroup = group;
// Mark time
m_lastTuneTime = DateTime.UtcNow;
}
// Restart all readers
ResetInformationReaders(true);
}
