Capturing Video from Web-camera on Windows 7 and 8 by using Media Foundation

#pragma once

#include <mfidl.h>
#include <memory>

struct IMFMediaSource;

class RawImage;

// Class for grabbing image from video stream
class ImageGrabber : public IMFSampleGrabberSinkCallback
{
public:
	~ImageGrabber(void);

	HRESULT initImageGrabber(IMFMediaSource *pSource, GUID VideoFormat);

	HRESULT startGrabbing(void);

	void stopGrabbing();

	RawImage *getRawImage();

	// Function of creation of the instance of the class
	static HRESULT CreateInstance(ImageGrabber **ppIG,unsigned int deviceID);

private:

	bool ig_RIE;

	bool ig_Close;
	
	long m_cRef;

	unsigned int ig_DeviceID;
	
	IMFMediaSource *ig_pSource;

	IMFMediaSession *ig_pSession;

	IMFTopology *ig_pTopology;
	
	RawImage *ig_RIOut;

	std::auto_ptr<RawImage> ig_RIFirst;

	std::auto_ptr<RawImage> ig_RISecond;
	
			
	ImageGrabber(unsigned int deviceID);
			
	HRESULT CreateTopology(IMFMediaSource *pSource, IMFActivate *pSinkActivate, IMFTopology **ppTopo);

	HRESULT AddSourceNode(
    IMFTopology *pTopology,           
    IMFMediaSource *pSource,          
    IMFPresentationDescriptor *pPD,   
    IMFStreamDescriptor *pSD,         
    IMFTopologyNode **ppNode);

	HRESULT AddOutputNode(
    IMFTopology *pTopology,     
    IMFActivate *pActivate,     
    DWORD dwId,                 
    IMFTopologyNode **ppNode);
	
	// IUnknown methods
	STDMETHODIMP QueryInterface(REFIID iid, void** ppv);
    STDMETHODIMP_(ULONG) AddRef();
    STDMETHODIMP_(ULONG) Release();

    // IMFClockStateSink methods
    STDMETHODIMP OnClockStart(MFTIME hnsSystemTime, LONGLONG llClockStartOffset);
    STDMETHODIMP OnClockStop(MFTIME hnsSystemTime);
    STDMETHODIMP OnClockPause(MFTIME hnsSystemTime);
    STDMETHODIMP OnClockRestart(MFTIME hnsSystemTime);
    STDMETHODIMP OnClockSetRate(MFTIME hnsSystemTime, float flRate);

    // IMFSampleGrabberSinkCallback methods
    STDMETHODIMP OnSetPresentationClock(IMFPresentationClock* pClock);
    STDMETHODIMP OnProcessSample(REFGUID guidMajorMediaType, DWORD dwSampleFlags,
        LONGLONG llSampleTime, LONGLONG llSampleDuration, const BYTE * pSampleBuffer,
        DWORD dwSampleSize);
    STDMETHODIMP OnShutdown();


};