/// <summary>
/// Free the nested structures and release any
/// COM objects within an AMMediaType struct.
/// </summary>
public static void FreeAMMediaType(CoreStreaming.AMMediaType mediaType)
{
if (mediaType.formatSize != 0)
Marshal.FreeCoTaskMem(mediaType.formatPtr);
if (mediaType.unkPtr != IntPtr.Zero)
Marshal.Release(mediaType.unkPtr);
mediaType.formatSize = 0;
mediaType.formatPtr = IntPtr.Zero;
mediaType.unkPtr = IntPtr.Zero;
}
public int SampleCB(double SampleTime, CoreStreaming.IMediaSample pSample)
{
return 0;
}
/// <summary>
/// Removes all filters downstream from a filter from the graph.
/// This is called only by DerenderGraph() to remove everything
/// from the graph except the devices and compressors. The parameter
/// "removeFirstFilter" is used to keep a compressor (that should
/// be immediately downstream of the device) if one is begin used.
/// </summary>
protected void RemoveDownstream(CoreStreaming.IBaseFilter filter, bool removeFirstFilter)
{
// Get a pin enumerator off the filter
CoreStreaming.IEnumPins pinEnum;
int hr = filter.EnumPins(out pinEnum);
pinEnum.Reset();
if ((hr == 0) && (pinEnum != null))
{
// Loop through each pin
var pins = new CoreStreaming.IPin[1];
int f;
do
{
// Get the next pin
hr = pinEnum.Next(1, pins, out f);
if ((hr == 0) && (pins[0] != null))
{
// Get the pin it is connected to
CoreStreaming.IPin pinTo = null;
pins[0].ConnectedTo(out pinTo);
if (pinTo != null)
{
// Is this an input pin?
var info = new CoreStreaming.PinInfo();
hr = pinTo.QueryPinInfo(out info);
if ((hr == 0) && (info.dir == (CoreStreaming.PinDirection.Input)))
{
// Recurse down this branch
RemoveDownstream(info.filter, true);
// Disconnect
GraphBuilder.Disconnect(pinTo);
GraphBuilder.Disconnect(pins[0]);
// Remove this filter
// but don't remove the video or audio compressors
if (info.filter != VideoCompressorFilter)
GraphBuilder.RemoveFilter(info.filter);
}
Marshal.ReleaseComObject(info.filter);
Marshal.ReleaseComObject(pinTo);
}
Marshal.ReleaseComObject(pins[0]);
}
}
while (hr == 0);
Marshal.ReleaseComObject(pinEnum); pinEnum = null;
}
}