关于diret show的基本问题

Question

我在graph edit中设置调试好了某种方式，可是实际编写的时候，
我ceateinstance   fiter实例时候，如何才能知道该filter的IID_XXX,而且有些在graph  edit中可以看见的filter,可是查help帮助，却没看见这个filger,如何解决。。？？？

Answer 1

#define     REGISTER_FILTERGRAPH
#ifdef REGISTER_FILTERGRAPHHRESULT AddGraphToRot(IUnknown *pUnkGraph, DWORD *pdwRegister) 
{
    IMoniker * pMoniker;
    IRunningObjectTable *pROT;
    TCHAR wsz[128];
    HRESULT hr;    if (FAILED(GetRunningObjectTable(0, &pROT))) {
        return E_FAIL;
    }    swprintf(wsz,TEXT("FilterGraph %08x pid %08x"), (DWORD_PTR)pUnkGraph, 
              GetCurrentProcessId());    hr = CreateItemMoniker(TEXT("!"), wsz, &pMoniker);
    if (SUCCEEDED(hr)) {
        hr = pROT->Register(0, pUnkGraph, pMoniker, pdwRegister);
        pMoniker->Release();
    }
    pROT->Release();
    return hr;
}
void RemoveGraphFromRot(DWORD pdwRegister)
{
    IRunningObjectTable *pROT;    if (SUCCEEDED(GetRunningObjectTable(0, &pROT))) {
        pROT->Revoke(pdwRegister);
        pROT->Release();
    }
}

Answer 2

#ifdef REGISTER_FILTERGRAPH
    hr = AddGraphToRot(pGBuilder, &g_dwGraphRegister);
    if (FAILED(hr))
    {
        Msg(TEXT("Failed to register filter graph with ROT!  hr=0x%x"), hr);
        g_dwGraphRegister = 0;
    }
#endif