COM 接收器,接收不到事件信息

[samsung99]

//class CSinkObj

#import "AxisMediaParser.dll" no_namespace named_guids

class ATL_NO_VTABLE CSinkObj :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<CSinkObj, &CLSID_SinkObj>,
public IDispatchImpl<ISinkObj, &IID_ISinkObj, &/*LIBID_AxisMediaParserLib*/LIBID_ATLEVNTLib>,
public IDispEventImpl<IDC_SRCOBJ, CSinkObj, &DIID_IAxisMediaParserEvents, &LIBID_AxisMediaParserLib, 1, 0>
{
public:
CSinkObj()
{
}

DECLARE_REGISTRY_RESOURCEID(IDR_SINKOBJ)

DECLARE_PROTECT_FINAL_CONSTRUCT()

BEGIN_COM_MAP(CSinkObj)
COM_INTERFACE_ENTRY(ISinkObj)
COM_INTERFACE_ENTRY(IDispatch)
END_COM_MAP()

BEGIN_SINK_MAP(CSinkObj)
SINK_ENTRY_EX(IDC_SRCOBJ, DIID_IAxisMediaParserEvents, 1, OnVideoSample32)
END_SINK_MAP()

void __stdcall OnVideoSample32(long CookieID, long SampleType, long SampleFlags, long StartTimeLow, long StartTimeHigh, long StopTimeLow, long StopTimeHigh, const VARIANT& SampleArray)
{
AtlTrace("OnVideoSample\n");
}
}

以下为调用:
HRESULT hRes = CoInitializeEx(NULL, COINIT_MULTITHREADED);
HRESULT hr = m_spSrcObj.CoCreateInstance(OLESTR("AxisMediaParserLib.AxisMediaParser"));

HRESULT hr = CComObject<CSinkObj>::CreateInstance(&m_pSinkObj);
m_pSinkObj->AddRef();
_ASSERTE(SUCCEEDED(hr));
hr = m_pSinkObj->DispEventAdvise(m_spSrcObj);

m_spSrcObj->PutMediaPassword(PASSWORD);
m_spSrcObj->PutMediaURL(URL_PROTOCOL);
m_spSrcObj->PutMediaUsername(LOGIN);
LONG lConnectionCookie; LONG lNumberOfStreams; VARIANT MediaType;
m_spSrcObj->Connect(&lConnectionCookie, &lNumberOfStreams, &MediaType);
long videoCode = 0;
m_spSrcObj->GetVideoCodec(&videoCode);
m_spSrcObj->Start();


调用方法成功,但OnVideoSample32接收不到事件消息.


请大佬指点一下,是不是接收器写得不对,多谢!

[雪影]

SINK_ENTRY_EX(IDC_SRCOBJ, DIID_IAxisMediaParserEvents, 1, OnVideoSample32) 没有指明OnVideoSample32函数的参数类型
使用SINK_ENTRY_INFO宏

_ATL_FUNC_INFO paraminfo =
     {
      CC_STDCALL, //calling conv
      VT_EMPTY,//返回值
      8 ,//参数个数
      {VT_I4,VT_I4,VT_I4,VT_I4,VT_I4,VT_I4,VT_I4,VT_VARIANT} //参数类型
     };
SINK_ENTRY_INFO(IDC_SRCOBJ, DIID_IAxisMediaParserEvents, 1, OnVideoSample32,¶minfo);

另外注意参数的个数不能超过8，不然没法成功

[samsung99]

终于搞定了,原来是有个数据类型写得不对,查了好几天,惭愧!
static _ATL_FUNC_INFO OnVideoSampleinfo =
{
CC_STDCALL, //calling conv
VT_EMPTY,//返回值
6,//参数个数
{VT_I4,VT_I4,VT_I4,VT_UI8,VT_UI8,VT_ARRAY|VT_I1} //参数类型
};

结帖.

[wshcdr]

呵呵，我都是手工写，不用这些宏

[samsung99]

现在是可以接收到事件消息,感谢tttyd(雪影) .

但在 ATLCOM.h 中的
HRESULT hr = DispCallFunc(
&thunk,
0,
info.cc,
info.vtReturn,
info.nParams,
info.pVarTypes,
pVarArgs,
pvarResult);
ATLASSERT(SUCCEEDED(hr));
出错, 网上说ATLCOM.h有BUG,不知是不是这样的,还是程序写得有问题