typedef void(CALLBACK *fPlayDataCallBack)(LONGlPlayHandle,DWORDdwDataType,BYTE*pBuffer,DWORDdwBufSize,DWORDdwUser); Callback Function Parameters lPlayHandle [out] 当前的录像播放句柄 dwDataType [out] 数据类型 宏定义宏定义值含义 NET_DVR_SYSHEAD1系统头数据 ...
我要做的是向服务器发送命令(你看到的3个字节数组是命令的)并等待服务器在发送下一个命令之前响应,要执行此操作,我使用了一段时间,变量“rocedlastanswer”是调用DataCallback方法时设置的标志,因此如果服务器响应,则调用回调,因此将标志设置为TRUE,因此发送何时退出并发送下一个命令。 当然,这不是我打算留下代码...
UnRegisterGPSDataCallback Function int32_t (*UnRegisterGPSDataCallback)() 手机停止使用位置服务时,手机通知设备……欲了解更多信息欢迎访问华为HarmonyOS开发者官网
PutCallback PutOption PutOption.Builder StatusCallback UidInstance Annotation Summary Permission com.huawei.hms.nearby.transfer Overview Class Summary Data DataCallback Data.File Data.Stream TransferEngine TransferStateUpdate Annotation Summary Data.Type TransferStateUpdate.Status ...
本文简单介绍OPC HDA规范的IOPCHDA_DataCallback(客户端接口)接口方法,更多通信资源请登录网信智汇(wangxinzhihui.com)。 1)HRESULTOnDataChange(dwTransactionID, hrStatus, dwNumItems, pItemValues, phrErrors) 此方法由客户端提供,用于处理来自OPCHDA服务器的通知,这些通知是由对OPCHDA_AsyncRead::AdviseRaw和OPC...
RegisterGpsDataCallBack Function int32_t (*RegisterGPSDataCallback)( DMSDPGPSCallback *callbac……欲了解更多信息欢迎访问华为HarmonyOS开发者官网
Provides data transfer status notifications. Windows Image Acquisition (WIA) data transfer methods of the IWiaDataTransfer interface periodically call this method. Syntax C++ 复制 HRESULT BandedDataCallback( [in] LONG lMessage, [in] LONG lStatus, [in] LONG lPercentComplete, [in] LONG lOffs...
The IWiaDataCallback interface inherits from the IUnknown interface. IWiaDataCallback also has these types of members: Methods The IWiaDataCallback interface has these methods. Expand table IWiaDataCallback::BandedDataCallback Provides data transfer status notifications. Windows Image Acquisition (WIA...
Provides access to member using which a client provide information that the object can't fully known about itself. A callback interface. Superseded ByITableDataCallback2 Product Availability Available with ArcGIS Desktop. Method Summary ICursor tableSearch(IQueryFilter pQueryFilter, boolean ...
GpsDataCallBack onReceiveCarGpsLocation onReceiveCarDrivingStatus onReceiveCarSensor Class CarDataReportFreq Camera(Beta) dmsdp_camera_handler.h Functions Overview DMSDPGetCameraHandler DMSDPSendBackDataCB Structs Overview DMSDPCameraHandler RegisterSendDataCallback OpenCamera...