Laser Gesture Recognition

namespace dshow.Core
{
	using System;
	using System.Runtime.InteropServices;

	// IPin interface
	//
	// The IPin interface represents a single, unidirectional
	// connection point on a filter
	//
	[ComImport,
	Guid("56A86891-0AD4-11CE-B03A-0020AF0BA770"),
	InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	public interface IPin
	{
		// Connects the pin to another pin
		[PreserveSig]
		int Connect(
			[In] IPin pReceivePin,
			[In, MarshalAs(UnmanagedType.LPStruct)] AMMediaType	pmt);

		// Accepts a connection from another pin
		[PreserveSig]
		int ReceiveConnection(
			[In] IPin pReceivePin,
			[In, MarshalAs(UnmanagedType.LPStruct)] AMMediaType	pmt);

		// Breaks the current pin connection
		[PreserveSig]
		int Disconnect();

		// Retrieves the pin connected to this pin
		[PreserveSig]
		int ConnectedTo(
			[Out] out IPin ppPin);

		// Retrieves the media type for the current pin connection
		[PreserveSig]
		int ConnectionMediaType(
			[Out, MarshalAs(UnmanagedType.LPStruct)] AMMediaType pmt);

		// Retrieves information about the pin, such as the name,
		// the owning filter, and the direction
		[PreserveSig]
		int QueryPinInfo(
			[Out, MarshalAs(UnmanagedType.LPStruct)] PinInfo pInfo);

		// Retrieves the direction of the pin (input or output)
		[PreserveSig]
		int QueryDirection(
			out PinDirection pPinDir);

		// Retrieves the pin identifier
		[PreserveSig]
		int QueryId(
			[Out, MarshalAs(UnmanagedType.LPWStr)] out string Id);

		// Determines whether the pin accepts a specified media type
		[PreserveSig]
		int QueryAccept(
			[In, MarshalAs(UnmanagedType.LPStruct)] AMMediaType	pmt);

		// Enumerates the pin's preferred media types
		[PreserveSig]
		int EnumMediaTypes(
			IntPtr ppEnum);

		// Retrieves the pins that are connected
		// internally to this pin (within the filter)
		[PreserveSig]
		int QueryInternalConnections(
			IntPtr apPin,
			[In, Out] ref int nPin);

		// Notifies the pin that no additional data is expected
		[PreserveSig]
		int EndOfStream();

		// Begins a flush operation
		[PreserveSig]
		int BeginFlush();

		// Ends a flush operation
		[PreserveSig]
		int EndFlush();

		// Notifies the pin that media samples received after
		// this call are grouped as a segment
		[PreserveSig]
		int NewSegment(
			long tStart,
			long tStop,
			double dRate);
	}
}