當設備客戶端抽象層使用sip設備插件的時候，不允許加載其他插件。

初始化步驟為：

> - cli_sys_InitLib(FALSE);
> - cli_sys_LoadDvrPlugin("SipDvrPlugin.dll");
> - cli_sys_UACRegister(...);
.
.
.
> - cli_sys_UACUnregister();
> - cli_sys_FiniLib();


目前sip插件支持的方法有:

DVRPLUGIN_API BOOL DVR_InitLib(void)
DVRPLUGIN_API BOOL DVR_FiniLib(void)

DVRPLUGIN_API BOOL DVR_UACRegister(char *serverip,char *usrid, char *password)
DVRPLUGIN_API BOOL DVR_UACUnregister()

DVRPLUGIN_API BOOL DVR_GetPluginInfo(PSPLUGININFO pinfo)
DVRPLUGIN_API BOOL DVR_SetCallback(unsigned int ifuntype, void * pfun)	
DVRPLUGIN_API BOOL DVR_SetLanguage(unsigned int ulanguage)
DVRPLUGIN_API BOOL DVR_EnumerateDeviceType(unsigned int uindex, char **sdevtype)
DVRPLUGIN_API BOOL DVR_CheckDeviceTypeSupt(char *sdevtype)

DVRPLUGIN_API BOOL DVR_ShowDeviceURLDlg(DLG_USE_TYPE mode, int *iret, PSDEVICEURL purl, BOOL bcenter, unsigned int ux , unsigned int uy)
DVRPLUGIN_API BOOL DVR_ConnectDeviceByURL(PSDEVICEURL purl, HANDLE *hdev)
DVRPLUGIN_API BOOL DVR_DisconnectDevice(HANDLE hdev)

DVRPLUGIN_API BOOL DVR_GetDeviceInfo(HANDLE hdev, PSDEVICEINFO pdevinfo)
DVRPLUGIN_API BOOL DVR_GetChannelInfo(HANDLE hdev, PSCHANNELINFO pchaninfo)
DVRPLUGIN_API BOOL DVR_GetPTZInfo(HANDLE hdev, unsigned int uchannel, PSPTZINFO pptzinfo)

DVRPLUGIN_API BOOL DVR_RealtimeDataStart(HANDLE hdev, PSTREAMPARAMS pparams, HANDLE *hstream, BOOL &baid, CString &surl)
DVRPLUGIN_API BOOL DVR_RealtimeDataStop(HANDLE hstream)

DVRPLUGIN_API BOOL DVR_GetVideoParams(HANDLE hdev, unsigned int uchannel, int *ibri, int *icon, int *isat, int *ihue)
DVRPLUGIN_API BOOL DVR_SetVideoParams(HANDLE hdev, unsigned int uchannel, int ibri, int icon, int isat, int ihue)

DVRPLUGIN_API BOOL DVR_PTZControl(HANDLE hdev, unsigned int uchannel, unsigned int ucommand, int iparam1, int iparam2, int iparam3, int iparam4)


DVRPLUGIN_API BOOL DVR_AlarmSubscribe(HANDLE hdev, int iusrdata)
DVRPLUGIN_API BOOL DVR_AlarmUnsubscribe(HANDLE hdev)

DVRPLUGIN_API BOOL DVR_GetSystemTime(HANDLE hdev,PSDEVICETIME pdevtime)
DVRPLUGIN_API BOOL DVR_SetSystemTime(HANDLE hdev,PSDEVICETIME pdevtime)

DVRPLUGIN_API BOOL DVR_GetRecordState(HANDLE hdev, PSSTATEGROUP precordstate)
DVRPLUGIN_API BOOL DVR_DevRecordStart(HANDLE hdev, unsigned int uchannel)
DVRPLUGIN_API BOOL DVR_DevRecordStop(HANDLE hdev, unsigned int uchannel)

DVRPLUGIN_API BOOL DVR_GetIOInState(HANDLE hdev, PSSTATEGROUP pioinstate) 
DVRPLUGIN_API BOOL DVR_GetIOOutState(HANDLE hdev, PSSTATEGROUP piooutstate)
DVRPLUGIN_API BOOL DVR_SetIOOutState(HANDLE hdev, unsigned int ioport, BOOL bstate)