HRESULT CheckInputType(const CMediaType *pmtin);

	HRESULT GetMediaType(int iPosition, CMediaType *pMediaType);

	HRESULT CheckTransform(const CMediaType *mtin,const CMediaType *mtout);

	HRESULT DecideBufferSize(IMemAllocator *pAlloc,ALLOCATOR_PROPERTIES *pProp);

	HRESULT Transform(IMediaSample *pin,IMediaSample *pout);

	void AdjustConstrast(BYTE *r,BYTE *g,BYTE *b);

	HRESULT Transform(AM_MEDIA_TYPE *pDest);

	HRESULT Transform(IMediaSample *pMediaSample);

	HRESULT copy(IMediaSample *pin,IMediaSample *pout);

	void ChangeContrast(RGBQUAD *pElem);