/// <summary>
///
/// </summary>
/// <param name="sourcePort"></param>
/// <param name="destinationPort"></param>
public TieLine(RoutingOutputPort sourcePort, RoutingInputPort destinationPort)
{
if (sourcePort == null || destinationPort == null)
{
throw new ArgumentNullException("source or destination port");
}
SourcePort = sourcePort;
DestinationPort = destinationPort;
}
/// <summary>
/// The recursive part of this. Will stop on each device, search its inputs for the
/// desired source and if not found, invoke this function for the each input port
/// hoping to find the source.
/// </summary>
/// <param name="destination"></param>
/// <param name="source"></param>
/// <param name="onSuccessOutputPort"></param>
/// <param name="alreadyCheckedDevices"></param>
/// <param name="signalType"></param>
/// <param name="cycle"></param>
/// <param name="routeTable"></param>
/// <returns>true if source is hit</returns>
static bool GetRouteToSource(this IRoutingInputs destination, IRoutingOutputs source,
RoutingOutputPort onSuccessOutputPort, List <IRoutingInputsOutputs> alreadyCheckedDevices,
eRoutingSignalType signalType, int cycle, RouteDescriptor routeTable)
{
cycle++;
Debug.Console(0, destination, "SelectInput-cycle {1}. Finding {2} route back to {0}", source.Key, cycle, signalType);
var destDevInputTies = TieLineCollection.Default.Where(t =>
t.DestinationPort.ParentDevice == destination && (t.Type == signalType || t.Type == eRoutingSignalType.AudioVideo));
// find a direct tie
var directTie = destDevInputTies.FirstOrDefault(
t => !(t.SourcePort.ParentDevice is IRoutingInputsOutputs) &&
t.DestinationPort.ParentDevice == destination &&
t.SourcePort.ParentDevice == source);
RoutingInputPort inputPort = null;
if (directTie != null) // Found a tie directly to the source
{
Debug.Console(0, destination, "Found direct tie to {0}**", source.Key);
inputPort = directTie.DestinationPort;
}
else // no direct-connect. Walk back devices.
{
Debug.Console(0, destination, "is not directly connected to {0}. Walking down tie lines", source.Key);
// No direct tie? Run back out on the inputs' attached devices...
// Only the ones that are routing devices
var attachedMidpoints = destDevInputTies.Where(t => t.SourcePort.ParentDevice is IRoutingInputsOutputs);
foreach (var inputTieToTry in attachedMidpoints)
{
Debug.Console(0, destination, "Trying to find route on {0}", inputTieToTry.SourcePort.ParentDevice.Key);
var upstreamDeviceOutputPort = inputTieToTry.SourcePort;
var upstreamRoutingDevice = upstreamDeviceOutputPort.ParentDevice as IRoutingInputsOutputs;
// Check if this previous device has already been walked
if (!(alreadyCheckedDevices != null && alreadyCheckedDevices.Contains(upstreamRoutingDevice)))
{
// haven't seen this device yet. Do it. Pass the output port to the next
// level to enable switching on success
var upstreamRoutingSuccess = upstreamRoutingDevice.GetRouteToSource(source, upstreamDeviceOutputPort,
alreadyCheckedDevices, signalType, cycle, routeTable);
if (upstreamRoutingSuccess)
{
Debug.Console(0, destination, "Upstream device route found");
inputPort = inputTieToTry.DestinationPort;
break; // Stop looping the inputs in this cycle
}
}
}
}
// we have a route on corresponding inputPort. *** Do the route ***
if (inputPort != null)
{
Debug.Console(0, destination, "adding route:");
if (onSuccessOutputPort == null)
{
// it's a sink device
routeTable.Routes.Add(new RouteSwitchDescriptor(inputPort));
}
else if (destination is IRouting)
{
routeTable.Routes.Add(new RouteSwitchDescriptor(onSuccessOutputPort, inputPort));
}
else // device is merely IRoutingInputOutputs
{
Debug.Console(0, destination, " No routing. Passthrough device");
}
Debug.Console(0, destination, "Exiting cycle {0}", cycle);
return(true);
}
if (alreadyCheckedDevices == null)
{
alreadyCheckedDevices = new List <IRoutingInputsOutputs>();
}
alreadyCheckedDevices.Add(destination as IRoutingInputsOutputs);
Debug.Console(0, destination, "No route found to {0}", source.Key);
return(false);
}
public RouteSwitchDescriptor(RoutingOutputPort outputPort, RoutingInputPort inputPort)
{
InputPort = inputPort;
OutputPort = outputPort;
}
/// <summary>
/// Creates a tie line with an overriding Type. See help for OverrideType property for info
/// </summary>
/// <param name="overrideType">The signal type to limit the link to. Overrides DestinationPort.Type</param>
public TieLine(RoutingOutputPort sourcePort, RoutingInputPort destinationPort, eRoutingSignalType overrideType) :
this(sourcePort, destinationPort)
{
OverrideType = overrideType;
}
