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MPColorTrackerFilter.h

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//==========================================================================;
//
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
//  PURPOSE.
//
//  Copyright (c) 1992 - 1998  Microsoft Corporation.  All Rights Reserved.
//
//--------------------------------------------------------------------------;
#ifndef __MPCOLORTRACKERFILTER_H__
#define __MPCOLORTRACKERFILTER_H__

#include "FilterInterface.h"

class MPColorTrackerFilter
: public CTransformFilter
, public IIPEffect
, public ISpecifyPropertyPages
, public CPersistStream
{
public:

        DECLARE_IUNKNOWN;
        static CUnknown * WINAPI CreateInstance(LPUNKNOWN punk, HRESULT *phr);

        // Reveals IEZMPColorTrackerFilter and ISpecifyPropertyPages
        STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void ** ppv);

        // CPersistStream stuff
        HRESULT ScribbleToStream(IStream *pStream);
        HRESULT ReadFromStream(IStream *pStream);

        // Overrriden from CTransformFilter base class

        HRESULT Transform(IMediaSample *pIn, IMediaSample *pOut);
        HRESULT CheckInputType(const CMediaType *mtIn);
        HRESULT CheckTransform(const CMediaType *mtIn, const CMediaType *mtOut);
        HRESULT DecideBufferSize(IMemAllocator *pAlloc, ALLOCATOR_PROPERTIES *pProperties);
        HRESULT GetMediaType(int iPosition, CMediaType *pMediaType);

        virtual HRESULT StartStreaming(); // frame dependent initialization
        virtual HRESULT StopStreaming();

        // These implement the custom IIPEffect interface

        STDMETHODIMP get_IPEffect(int *IPEffect); //, REFTIME *StartTime, REFTIME *Length);
        STDMETHODIMP put_IPEffect(int IPEffect); //, REFTIME StartTime, REFTIME Length);

        // ISpecifyPropertyPages interface
        STDMETHODIMP GetPages(CAUUID *pPages);

        // CPersistStream override
        STDMETHODIMP GetClassID(CLSID *pClsid);

private:

        MPColorTrackerFilter(TCHAR *tszName, LPUNKNOWN punk, HRESULT *phr);    // Constructor
        ~MPColorTrackerFilter();        // Destructor

        // Look after doing the special effect
        BOOL CanPerformMPColorTrackerFilter(const CMediaType *pMediaType) const;
        HRESULT Copy(IMediaSample *pSource, IMediaSample *pDest);
        HRESULT Transform(IMediaSample *pMediaSample);

        CCritSec        m_MPColorTrackerFilterLock;          // Private play critical section
        int m_effect;               // Which effect are we processing
        const long m_lBufferRequest;    // The number of buffers to use
        int m_imgWidth;
        int m_imgHeight;

        CRefTime    m_currentTime;      // time of currently executing filter.
        CRefTime    m_lastValidTime;    // last time something valid was tracked
        CRefTime    m_resetInterval;    // when this much time passes since last valid

        FilterInterface m_interface;

}; // EZMPColorTrackerFilter

#endif __MPCOLORTRACKERFILTER_H__

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