/// <summary>
/// Erzeugt eine Kopie der angegebenen Ursprungs.
/// </summary>
/// <param name="location">Der ursprüngliche Ursprung, wobei <i>null</i> erlaubt ist.</param>
/// <returns>Eine Kopie des Ursprungs oder <i>null</i>.</returns>
public static T CloneLocation <T>(this T location) where T : GroupLocation
{
// Create it
if (location == null)
{
return(null);
}
else
{
return(GroupLocation.FromString <T>(location.ToString()));
}
}
/// <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);
}
/// <summary> /// Stellt den Empfang auf eine bestimmte Quellgruppe eines Ursprungs ein. /// </summary> /// <param name="location">Der gewünschte Ursprung.</param> /// <param name="group">Die gewünschte Quellgruppe.</param> protected abstract void OnSelectGroup(GroupLocation location, SourceGroup group);
/// <summary>
/// Erzeugt eine Informationsinstanz zu einem Ursprung aus eine zusammengehörigen Gruppe von
/// SI NIT Tabellen eines DVB.NET Gerätes.
/// </summary>
/// <typeparam name="G">Die konkrete Art der Quellgruppen.</typeparam>
/// <typeparam name="L">Die konkrete Art der Information.</typeparam>
/// <param name="location">Der Usprung, zu dem die Tabellen ermittelt wurden.</param>
/// <param name="tables">Die SI NIT Tabellengruppe zum noch angewählten Ursprung.</param>
/// <returns>Eine Informationsisntanz passend zur SI NIT Tabellengruppe oder <i>null</i>.</returns>
private static L CreateLocationInformation <G, L>(GroupLocation <G> location, NIT[] tables)
where G : SourceGroup, new()
where L : LocationInformation <G>, new()
{
// None
if (null == tables)
{
return(null);
}
// Create the new instance
L info = new L {
Location = location
};
// Process all groups in all tables
foreach (var table in tables)
{
foreach (var entry in table.Table.NetworkEntries)
{
foreach (var descriptor in entry.Descriptors)
{
// Start with DVB-S(2)
var sat = descriptor as EPG.Descriptors.SatelliteDelivery;
if (null != sat)
{
// Process
G group = sat.ToGroup() as G;
// Add if possible
if (null != group)
{
info.SourceGroups.Add(group);
}
// Process next group
break;
}
// Then DVB-C
var cab = descriptor as EPG.Descriptors.CableDelivery;
if (null != cab)
{
// Process
G group = cab.ToGroup() as G;
// Add if possible
if (null != group)
{
info.SourceGroups.Add(group);
}
// Process next group
break;
}
// Finally DVB-T
var ter = descriptor as EPG.Descriptors.TerrestrialDelivery;
if (null != ter)
{
// Process
G group = ter.ToGroup() as G;
// Add if possible
if (null != group)
{
info.SourceGroups.Add(group);
}
// Process next group
break;
}
}
}
}
// Report
return(info);
}