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00001 /*
00002  * COPYRIGHT:       See COPYING in the top level directory
00003  * PROJECT:         ReactOS BDA Proxy
00004  * FILE:            dll/directx/msvidctl/classfactory.cpp
00005  * PURPOSE:         ClassFactory interface
00006  *
00007  * PROGRAMMERS:     Johannes Anderwald (janderwald@reactos.org)
00008  */
00009 #include "precomp.h"
00010 
00011 const GUID IID_IUnknown           = {0x00000000, 0x0000, 0x0000, {0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46}};
00012 const GUID IID_IClassFactory      = {0x00000001, 0x0000, 0x0000, {0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46}};
00013 
00014 class CClassFactory : public IClassFactory
00015 {
00016 public:
00017     STDMETHODIMP QueryInterface( REFIID InterfaceId, PVOID* Interface);
00018 
00019     STDMETHODIMP_(ULONG) AddRef()
00020     {
00021         InterlockedIncrement(&m_Ref);
00022         return m_Ref;
00023     }
00024     STDMETHODIMP_(ULONG) Release()
00025     {
00026         InterlockedDecrement(&m_Ref);
00027         if (!m_Ref)
00028         {
00029             delete this;
00030             return 0;
00031         }
00032         return m_Ref;
00033     }
00034 
00035     HRESULT WINAPI CreateInstance(LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject);
00036     HRESULT WINAPI LockServer(BOOL fLock);
00037 
00038     CClassFactory(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, IID *riidInst) : m_Ref(1), m_lpfnCI(lpfnCI), m_IID(riidInst)
00039     {};
00040 
00041     virtual ~CClassFactory(){};
00042 
00043 protected:
00044     LONG m_Ref;
00045     LPFNCREATEINSTANCE m_lpfnCI;
00046     IID * m_IID;
00047 };
00048 
00049 HRESULT
00050 WINAPI
00051 CClassFactory::QueryInterface(
00052     REFIID riid,
00053     LPVOID *ppvObj)
00054 {
00055     *ppvObj = NULL;
00056     if(IsEqualIID(riid, IID_IUnknown) || IsEqualIID(riid, IID_IClassFactory))
00057     {
00058         *ppvObj = PVOID(this);
00059         InterlockedIncrement(&m_Ref);
00060         return S_OK;
00061     }
00062     return E_NOINTERFACE;
00063 }
00064 
00065 HRESULT
00066 WINAPI
00067 CClassFactory::CreateInstance(
00068     LPUNKNOWN pUnkOuter,
00069     REFIID riid,
00070     LPVOID *ppvObject)
00071 {
00072     *ppvObject = NULL;
00073 
00074     if ( m_IID == NULL || IsEqualCLSID(riid, *m_IID) || IsEqualCLSID(riid, IID_IUnknown))
00075     {
00076         return m_lpfnCI(pUnkOuter, riid, ppvObject);
00077     }
00078 
00079     return E_NOINTERFACE;
00080 }
00081 
00082 HRESULT
00083 WINAPI
00084 CClassFactory::LockServer(
00085     BOOL fLock)
00086 {
00087     return E_NOTIMPL;
00088 }
00089 
00090 IClassFactory * 
00091 CClassFactory_fnConstructor(
00092     LPFNCREATEINSTANCE lpfnCI, 
00093     PLONG pcRefDll, 
00094     IID * riidInst)
00095 {
00096     CClassFactory* factory = new CClassFactory(lpfnCI, pcRefDll, riidInst);
00097 
00098     if (!factory)
00099         return NULL;
00100 
00101     if (pcRefDll)
00102         InterlockedIncrement(pcRefDll);
00103 
00104     return (LPCLASSFACTORY)factory;
00105 }
00106
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