private string GetNodeNameForFilter(Filter filter)
{
String name = filter.DisplayName;
Regex re = new Regex(@"[^\w]+");
return re.Replace(name, "_");
}
internal void AddFilter(Filter filter)
{
_filters.Add(filter);
}
private void RenderDotFileFilter(TextWriter writer, Filter filter)
{
String filterNodeName = GetNodeNameForFilter(filter);
IList<Pin> inPins = filter.GetPins(DirectShowLib.PinDirection.Input);
IList<Pin> outPins = filter.GetPins(DirectShowLib.PinDirection.Output);
int numPinRows = inPins.Count;
if (outPins.Count > numPinRows)
{
numPinRows = outPins.Count;
}
writer.WriteLine("/* Filter '{0}' */",
filter.DisplayName);
writer.WriteLine(" {0} [", filterNodeName);
writer.WriteLine(" shape=plaintext,");
writer.Write(" label=<");
writer.WriteLine("<table border=\"2\" cellpadding=\"0\">");
for (int pinRow = 0; pinRow < numPinRows; pinRow++)
{
writer.WriteLine(" <tr>");
if (pinRow < inPins.Count)
{
//Create a cell for one of the input pins
writer.WriteLine(" <td port=\"pin{0}\" align=\"left\" cellpadding=\"2\"><font point-size=\"8\" face=\"Courier\">{1}</font></td>",
inPins[pinRow].Ordinal,
inPins[pinRow].Name);
}
else
{
//No more input pins; render an empty cell
writer.WriteLine(" <td border=\"0\"></td>");
}
if (pinRow < outPins.Count)
{
//Create a cell for one of the output pins
writer.WriteLine(" <td port=\"pin{0}\" align=\"right\" cellpadding=\"2\"><font point-size=\"8\" face=\"Courier\">{1}</font></td>",
outPins[pinRow].Ordinal,
outPins[pinRow].Name);
}
else
{
//No more output pins; render an empty cell
writer.WriteLine(" <td border=\"0\"></td>");
}
writer.WriteLine(" </tr>");
}
writer.WriteLine(" <tr>");
writer.WriteLine(" <td border=\"0\" colspan=\"2\"><font point-size=\"12\" face=\"Arial Bold\">{0}</font></td>",
filter.DisplayName);
writer.WriteLine(" </tr>");
writer.WriteLine(" </table>");
writer.WriteLine(" >]");
writer.WriteLine();
}
private void RenderDotFileFilterEdges(TextWriter writer, Filter filter)
{
//Each pin that's connected to another pin makes up an edge.
//Create an edge from the port on the source filter corresponding to the output pin
//with the port on the destinaion filter corresponding to the input pin
foreach (Pin pin in filter.Pins)
{
if (pin.GetDirection() != DirectShowLib.PinDirection.Output)
{
continue;
}
Pin connectedToPin = pin.GetConnectedPin();
if (connectedToPin == null)
{
continue;
}
String edgeSource = String.Format("{0}:pin{1}",
GetNodeNameForFilter(filter),
pin.Ordinal);
String edgeDestination = String.Format("{0}:pin{1}",
GetNodeNameForFilter(connectedToPin.Filter),
connectedToPin.Ordinal);
writer.WriteLine("/* Edge between Filter '{0}' pin '{1} and filter '{2}' pin '{3}' */",
filter.DisplayName,
pin.Name,
connectedToPin.Filter.DisplayName,
connectedToPin.Name);
writer.WriteLine(" {0} -> {1}", edgeSource, edgeDestination);
writer.WriteLine();
}
}
internal Pin(Filter filter, IPin pin)
{
_filter = filter;
_pin = pin;
}