#include <Control.h>

// 定义 IMediaPosition 接口的 GUID
// {56A868B2-0AD4-11CE-B03A-0020AF0BA770}
DEFINE_GUID(IID_IMediaPosition, 
0x56A868B2, 0x0AD4, 0x11CE, 0xB0, 0x3A, 0x00, 0x20, 0xAF, 0x0B, 0xA7, 0x70);

// IMediaPosition 接口的定义
DECLARE_INTERFACE_(IMediaPosition, IUnknown)
{
    // IUnknown 接口的成员函数
    STDMETHOD(QueryInterface)(THIS_ REFIID riid, void **ppvObject) PURE;
    STDMETHOD_(ULONG, AddRef)(THIS) PURE;
    STDMETHOD_(ULONG, Release)(THIS) PURE;

    // IMediaPosition 接口的成员函数
    STDMETHOD(get_Duration)(THIS_ REFTIME *pDuration) PURE;
    STDMETHOD(put_CurrentPosition)(THIS_ REFTIME llTime) PURE;
    STDMETHOD(get_CurrentPosition)(THIS_ REFTIME *pllTime) PURE;
    STDMETHOD(get_StopTime)(THIS_ REFTIME *pTime) PURE;
    STDMETHOD(put_StopTime)(THIS_ REFTIME llTime) PURE;
    STDMETHOD(get_PrerollTime)(THIS_ REFTIME *pTime) PURE;
    STDMETHOD(put_PrerollTime)(THIS_ REFTIME llTime) PURE;
    STDMETHOD(put_Rate)(THIS_ double dRate) PURE;
    STDMETHOD(get_Rate)(THIS_ double *pdRate) PURE;
    STDMETHOD(CanSeekForward)(THIS_ long *pCanSeekForward) PURE;
    STDMETHOD(CanSeekBackward)(THIS_ long *pCanSeekBackward) PURE;
};