dshow/Filter.cs

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

	/// <summary>
	/// Summary description for Filter.
	/// </summary>
	public class Filter : IComparable
	{
		// Device name
		public readonly string Name;

		// Moniker string
		public readonly string MonikerString;

		// Create new filter from moneker`s string
		public Filter(string monikerString)
		{
			MonikerString = monikerString;
			Name = GetName(monikerString);
		}

		// Create new filter from it's Moniker
		internal Filter(UCOMIMoniker moniker)
		{
			MonikerString = GetMonikerString(moniker);
			Name = GetName(moniker);
		}


		// Get moniker string of the moniker
		private string GetMonikerString(UCOMIMoniker moniker)
		{
			string str;
			moniker.GetDisplayName(null, null, out str);
			return str;
		}

		// Get filter name represented by the moniker
		private string GetName(UCOMIMoniker moniker)
		{
			Object			bagObj = null;
			IPropertyBag	bag = null;

			try
			{
				Guid bagId = typeof(IPropertyBag).GUID;
				// get property bag of the moniker
				moniker.BindToStorage(null, null, ref bagId, out bagObj);
				bag = (IPropertyBag) bagObj;

				// read FriendlyName
				object val = "";
				int hr = bag.Read("FriendlyName", ref val, IntPtr.Zero);
				if (hr != 0)
					Marshal.ThrowExceptionForHR(hr);

				// get it as string