NOPINS.H

//==========================================================================; 
// 
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY 
//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR 
//  PURPOSE. 
// 
//  Copyright (c) 1992 - 1997  Microsoft Corporation.  All Rights Reserved. 
// 
//--------------------------------------------------------------------------; 
 
/* 
 * Null Filter - A filter that does nothing and has no pins !!! 
 */ 
 
class CNoPins : public CBaseFilter 
{ 
public: 
 
    //  Make one of these 
    static CUnknown * WINAPI CreateInstance(LPUNKNOWN punk, HRESULT *phr); 
 
    //  Constructor 
    CNoPins(LPUNKNOWN pUnk, HRESULT *phr); 
 
    //  Interface methods 
    STDMETHODIMP Run(REFERENCE_TIME tStart); 
    STDMETHODIMP Stop(); 
 
    //  CBaseFilter methods 
    int CNoPins::GetPinCount();     // 0 pins 
    CBasePin *CNoPins::GetPin(int iPin); 
 
private: 
    //  Locking 
    CCritSec m_Lock; 
 
    //  Don't send EC_COMPLETE twice 
    BOOL     m_bComplete; 
}; 
 
/*  Our class id */ 
// NoPins filter object 
// a8fbb9c0-92e1-11cf-b4d1-00805f6cbbea 
DEFINE_GUID(CLSID_NoPins, 
0xa8fbb9c0, 0x92e1, 0x11cf, 0xb4, 0xd1, 0x00, 0x80, 0x5f, 0x6c, 0xbb, 0xea);