qt-everywhere-src-5.14.1/qtmultimedia/src/plugins/directshow/common/directshowbasefilter.h

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#ifndef DIRECTSHOWBASEFILTER_H
#define DIRECTSHOWBASEFILTER_H

#include "directshowpin.h"

QT_BEGIN_NAMESPACE

class DirectShowBaseFilter : public IBaseFilter
{
public:
    DirectShowBaseFilter();
    virtual ~DirectShowBaseFilter();

    FILTER_STATE state() const { return m_state; }
    HRESULT NotifyEvent(long eventCode, LONG_PTR eventParam1, LONG_PTR eventParam2);

    virtual QList<DirectShowPin *> pins() = 0;

    // IPersist
    STDMETHODIMP GetClassID(CLSID *pClassID) override;

    // IMediaFilter
    STDMETHODIMP Run(REFERENCE_TIME tStart) override;
    STDMETHODIMP Pause() override;
    STDMETHODIMP Stop() override;

    STDMETHODIMP GetState(DWORD dwMilliSecsTimeout, FILTER_STATE *pState) override;

    STDMETHODIMP SetSyncSource(IReferenceClock *pClock) override;
    STDMETHODIMP GetSyncSource(IReferenceClock **ppClock) override;

    // IBaseFilter
    STDMETHODIMP EnumPins(IEnumPins **ppEnum) override;
    STDMETHODIMP FindPin(LPCWSTR Id, IPin **ppPin) override;

    STDMETHODIMP JoinFilterGraph(IFilterGraph *pGraph, LPCWSTR pName) override;

    STDMETHODIMP QueryFilterInfo(FILTER_INFO *pInfo) override;
    STDMETHODIMP QueryVendorInfo(LPWSTR *pVendorInfo) override;

protected:
    QRecursiveMutex m_mutex;
    FILTER_STATE m_state = State_Stopped;
    IFilterGraph *m_graph = nullptr;
    IReferenceClock *m_clock = nullptr;
    IMediaEventSink *m_sink = nullptr;
    QString m_filterName;
    REFERENCE_TIME m_startTime = 0;

private:
    Q_DISABLE_COPY(DirectShowBaseFilter)
};

QT_END_NAMESPACE

#endif // DIRECTSHOWBASEFILTER_H