cgraphbuildercb.cpp

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//
// CGraphBuilderCB.cpp
//

#include "stdafx.h"
#include <streams.h>
#include "CGraphBuilderCB.h"
#include "CSupported.h"

//////////////////////////////////////////////////////////////////////////////
CGraphBuilderCB::CGraphBuilderCB() :
CUnknown(NAME("Callbacker"), NULL)
{
	mSupported = new CSupported();
}

CGraphBuilderCB::~CGraphBuilderCB()
{
	if (mSupported)
	{
		delete mSupported;
		mSupported = NULL;
	}
}

STDMETHODIMP CGraphBuilderCB::NonDelegatingQueryInterface(REFIID riid, void** ppv)
{
    if (riid == __uuidof(IAMGraphBuilderCallback)) 
	{
        return GetInterface((IAMGraphBuilderCallback*)this, ppv);
    }
    return CUnknown::NonDelegatingQueryInterface(riid,ppv);
}

//////////////////////////////////////////////////////////////////////////////
//
// IAMGraphBuilderCallback-overriden functions
//////////////////////////////////////////////////////////////////////////////
//----------------------------------------------------------------------------
// SelectedFilter
//
//----------------------------------------------------------------------------
STDMETHODIMP CGraphBuilderCB::SelectedFilter(IMoniker *pMon)
{
	if (!pMon)
	{
		return E_POINTER;
	}

	IBindCtx * pBCtx = NULL;
	HRESULT hr = CreateBindCtx(0, (LPBC*)&pBCtx );
	if (!pBCtx || FAILED(hr))
	{
		return E_UNEXPECTED;
	}

	IBaseFilter * pBf = NULL;
    hr = pMon->BindToObject(pBCtx, NULL, __uuidof(IBaseFilter), (void**)&pBf);
    pBCtx->Release();
    if (FAILED(hr) || !pBf)
    {
        return E_UNEXPECTED;
    }

	// Get filter's CLSID
	IPersist * pPersist = NULL;
	hr = pBf->QueryInterface( __uuidof(IPersist), (void**)&pPersist);
	pBf->Release();
	if (SUCCEEDED(hr))
	{
		CLSID  clsid = GUID_NULL;
		pPersist->GetClassID(&clsid);
		pPersist->Release();
		if (CSupported::IsGUIDSupported(clsid))
		{
			return S_OK;
		}
	}
	return E_FAIL;
}

//----------------------------------------------------------------------------
// CreatedFilter
//
//----------------------------------------------------------------------------
STDMETHODIMP CGraphBuilderCB::CreatedFilter(IBaseFilter *pBf)
{
    return S_OK;
}