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# BaseVideoFilter.h

    00001 #pragma once
    00002
    00003 class CBaseVideoFilter : public CTransformFilter
    00004 {
    00005 private:
    00006     HRESULT Receive(IMediaSample* pIn);
    00007         HRESULT ReconnectOutput(int w, int h);
    00008
    00009         // these are private for a reason, don't bother them
    00010         DWORD m_win, m_hin, m_arxin, m_aryin;
    00011         DWORD m_wout, m_hout, m_arxout, m_aryout;
    00012
    00013 protected:
    00014         CCritSec m_csReceive;
    00015
    00016         int m_w, m_h, m_arx, m_ary;
    00017
    00018         HRESULT GetDeliveryBuffer(int w, int h, IMediaSample** ppOut);
    00019         HRESULT CopyBuffer(BYTE* pOut, BYTE* pIn, int w, int h, int pitchIn, const GUID& subtype);
    00020         HRESULT CopyBuffer(BYTE* pOut, BYTE** ppIn, int w, int h, int pitchIn, const GUID& subtype);
    00021
    00022         virtual void GetOutputSize(int& w, int& h, int& arx, int& ary) {}
    00023         virtual HRESULT Transform(IMediaSample* pIn) = 0;
    00024
    00025 public:
    00026         CBaseVideoFilter(TCHAR* pName, LPUNKNOWN lpunk, HRESULT* phr, REFCLSID clsid);
    00027         virtual ~CBaseVideoFilter();
    00028
    00029         int GetPinCount();
    00030         CBasePin* GetPin(int n);
    00031
    00032     HRESULT CheckInputType(const CMediaType* mtIn);
    00033         HRESULT CheckOutputType(const CMediaType& mtOut);
    00034     HRESULT CheckTransform(const CMediaType* mtIn, const CMediaType* mtOut);
    00035     HRESULT DecideBufferSize(IMemAllocator* pAllocator, ALLOCATOR_PROPERTIES* pProperties);
    00036     HRESULT GetMediaType(int iPosition, CMediaType* pMediaType);
    00037         HRESULT SetMediaType(PIN_DIRECTION dir, const CMediaType* pmt);
    00038 };
    00039
    00040 class CBaseVideoInputAllocator : public CMemAllocator
    00041 {
    00042         CMediaType m_mt;
    00043
    00044 public:
    00045         CBaseVideoInputAllocator(HRESULT* phr);
    00046         void SetMediaType(const CMediaType& mt);
    00047         STDMETHODIMP GetBuffer(IMediaSample** ppBuffer, REFERENCE_TIME* pStartTime, REFERENCE_TIME* pEndTime, DWORD dwFlags);
    00048 };
    00049
    00050 class CBaseVideoInputPin : public CTransformInputPin
    00051 {
    00052         CBaseVideoInputAllocator* m_pAllocator;
    00053
    00054 public:
    00055         CBaseVideoInputPin(TCHAR* pObjectName, CBaseVideoFilter* pFilter, HRESULT* phr, LPCWSTR pName);
    00056         ~CBaseVideoInputPin();
    00057
    00058         STDMETHODIMP GetAllocator(IMemAllocator** ppAllocator);
    00059         STDMETHODIMP ReceiveConnection(IPin* pConnector, const AM_MEDIA_TYPE* pmt);
    00060 };
    00061
    00062 class CBaseVideoOutputPin : public CTransformOutputPin
    00063 {
    00064 public:
    00065         CBaseVideoOutputPin(TCHAR* pObjectName, CBaseVideoFilter* pFilter, HRESULT* phr, LPCWSTR pName);
    00066
    00067     HRESULT CheckMediaType(const CMediaType* mtOut);
    00068 };