using System;
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using System.Collections;
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using System.Runtime.InteropServices;
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using System.Runtime.InteropServices.ComTypes;
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namespace FaceAI
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{
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[ComVisible(false)]
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public class FilterCategory // uuids.h : CLSID_*
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{
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/// <summary> CLSID_AudioInputDeviceCategory, audio capture category </summary>
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public static readonly Guid AudioInputDevice = new Guid(0x33d9a762, 0x90c8, 0x11d0, 0xbd, 0x43, 0x00, 0xa0, 0xc9, 0x11, 0xce, 0x86);
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/// <summary> CLSID_VideoInputDeviceCategory, video capture category </summary>
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public static readonly Guid VideoInputDevice = new Guid(0x860BB310, 0x5D01, 0x11d0, 0xBD, 0x3B, 0x00, 0xA0, 0xC9, 0x11, 0xCE, 0x86);
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}
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[ComVisible(false)]
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public class Clsid // uuids.h : CLSID_*
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{
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/// <summary> CLSID_SystemDeviceEnum for ICreateDevEnum </summary>
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public static readonly Guid SystemDeviceEnum = new Guid(0x62BE5D10, 0x60EB, 0x11d0, 0xBD, 0x3B, 0x00, 0xA0, 0xC9, 0x11, 0xCE, 0x86);
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/// <summary> CLSID_FilterGraph, filter Graph </summary>
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public static readonly Guid FilterGraph = new Guid(0xe436ebb3, 0x524f, 0x11ce, 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70);
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/// <summary> CLSID_CaptureGraphBuilder2, new Capture graph building </summary>
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public static readonly Guid CaptureGraphBuilder2 = new Guid(0xBF87B6E1, 0x8C27, 0x11d0, 0xB3, 0xF0, 0x0, 0xAA, 0x00, 0x37, 0x61, 0xC5);
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/// <summary> CLSID_SampleGrabber, Sample Grabber filter </summary>
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public static readonly Guid SampleGrabber = new Guid(0xC1F400A0, 0x3F08, 0x11D3, 0x9F, 0x0B, 0x00, 0x60, 0x08, 0x03, 0x9E, 0x37);
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/// <summary> CLSID_DvdGraphBuilder, DVD graph builder </summary>
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public static readonly Guid DvdGraphBuilder = new Guid(0xFCC152B7, 0xF372, 0x11d0, 0x8E, 0x00, 0x00, 0xC0, 0x4F, 0xD7, 0xC0, 0x8B);
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}
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[ComVisible(false)]
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public class DevEnum
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{
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public static bool GetDevicesOfCat(Guid cat, out ArrayList devs)
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{
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devs = null;
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int hr;
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object comObj = null;
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ICreateDevEnum enumDev = null;
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IEnumMoniker enumMon = null;
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IMoniker[] mon = new IMoniker[1];
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try
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{
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Type srvType = Type.GetTypeFromCLSID(Clsid.SystemDeviceEnum);
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if (srvType == null)
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throw new NotImplementedException("System Device Enumerator");
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comObj = Activator.CreateInstance(srvType);
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enumDev = (ICreateDevEnum)comObj;
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hr = enumDev.CreateClassEnumerator(ref cat, out enumMon, 0);
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if (hr != 0)
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throw new NotSupportedException("No devices of the category");
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int /*f, */count = 0;
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IntPtr ptr = new IntPtr();
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do
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{
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hr = enumMon.Next(1, mon, ptr);
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if ((hr != 0) || (mon[0] == null))
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break;
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DsDevice dev = new DsDevice();
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GetFriendlyName(mon[0], ref dev.Name, ref dev.Path);
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if (devs == null)
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devs = new ArrayList();
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dev.id = count;
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dev.Mon = mon[0]; mon[0] = null;
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devs.Add(dev); dev = null;
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count++;
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}
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while (true);
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return count > 0;
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}
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catch (Exception)
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{
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if (devs != null)
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{
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foreach (DsDevice d in devs)
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d.Dispose();
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devs = null;
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}
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return false;
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}
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finally
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{
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enumDev = null;
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if (mon[0] != null)
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Marshal.ReleaseComObject(mon[0]); mon[0] = null;
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if (enumMon != null)
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Marshal.ReleaseComObject(enumMon); enumMon = null;
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if (comObj != null)
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Marshal.ReleaseComObject(comObj); comObj = null;
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}
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}
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private static bool GetFriendlyName(IMoniker mon, ref string devname, ref string devpath)
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{
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object bagObj = null;
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IPropertyBag bag = null;
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try
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{
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Guid bagId = typeof(IPropertyBag).GUID;
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mon.BindToStorage(null, null, ref bagId, out bagObj);
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bag = (IPropertyBag)bagObj;
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object val = "";
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int hr = bag.Read("Description", ref val, IntPtr.Zero);
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if(hr != 0)
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hr = bag.Read("FriendlyName", ref val, IntPtr.Zero);
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if (hr != 0)
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Marshal.ThrowExceptionForHR(hr);
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devname = val as string;
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if ((devname == null) || (devname.Length < 1))
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throw new NotImplementedException("Device FriendlyName");
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val = "";
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hr = bag.Read("DevicePath", ref val, IntPtr.Zero);
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if (hr != 0)
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Marshal.ThrowExceptionForHR(hr);
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devpath = val as string;
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if((devpath == null) || (devpath.Length < 1))
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throw new NotImplementedException("Device Path");
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return true;
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}
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catch (Exception)
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{
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return false;
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}
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finally
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{
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bag = null;
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if (bagObj != null)
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Marshal.ReleaseComObject(bagObj); bagObj = null;
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}
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}
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}
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[ComVisible(false)]
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public class DsDevice : IDisposable
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{
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public int id;
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public string Name;
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public string Path;
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public IMoniker Mon;
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public void Dispose()
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{
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if (Mon != null)
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Marshal.ReleaseComObject(Mon); Mon = null;
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}
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}
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[ComVisible(true), ComImport,
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Guid("29840822-5B84-11D0-BD3B-00A0C911CE86"),
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InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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public interface ICreateDevEnum
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{
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[PreserveSig]
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int CreateClassEnumerator(
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[In] ref Guid pType,
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[Out] out IEnumMoniker ppEnumMoniker,
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[In] int dwFlags);
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}
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[ComVisible(true), ComImport,
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Guid("55272A00-42CB-11CE-8135-00AA004BB851"),
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InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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public interface IPropertyBag
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{
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[PreserveSig]
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int Read(
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[In, MarshalAs(UnmanagedType.LPWStr)] string pszPropName,
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[In, Out, MarshalAs(UnmanagedType.Struct)] ref object pVar,
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IntPtr pErrorLog);
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[PreserveSig]
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int Write(
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[In, MarshalAs(UnmanagedType.LPWStr)] string pszPropName,
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[In, MarshalAs(UnmanagedType.Struct)] ref object pVar);
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}
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}
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