EasyNVR接入EasyDSS云视频平台快照上传实现

EasyNVR拥有接入EasyDSS云平台的功能

接入EasyDSS云平台会定时向云平台上传快照数据，这个快照数据用于云平台向客户端提供快照展示

遇到的问题

由于快照上传的间隔提供认为修改的功能，则我们限定最短时间为1分钟

通道的数量会直接影响快照上传

考虑到压力情况，1分钟之内上传上千通道的快照

快照数据经过Base64编码，会比快照真实数据扩大1.33333倍，数据量大

EasyNVR的固定通道设计

解决方案

将所有通道快照上传分散在快照间隔时间内

若遇到通道未启用、通道不在线则跳过，并且减少通道数量，增大间隔时间

实现

virtual SInt64 Run(){    EventFlags event = this->GetEvents();    if (event & Task::kIdleEvent || event & Task::kUpdateEvent)    {           if (!channels_)               return 0;        bool allUploaded = true;        for (int i = 0; i < MAX_CHANNEL_COUNT; i++)        {            if (snapCtrlArray_[i])            {                allUploaded = false;                break;            }        }        if (allUploaded)        {            return 0;        }        if (snapCtrlArray_[curSnapIndex_])        {               snapCtrlArray_[curSnapIndex_] = false;               int curChannel = curSnapIndex_ + 1;               if (++curSnapIndex_ > MAX_CHANNEL_COUNT - 1)               {                   curSnapIndex_ = 0;               }               CameraInfo* cameraInfo = (*channels_)[curChannel]->GetChannelInfo();               if (!cameraInfo->enable || !cameraInfo->online)               {                   --postSnapCount_;                   return 1;               }            postSnap(curChannel);        }        //return (std::min)(timeout_ * 60 / MAX_CHANNEL_COUNT, 3) * 1000;        return timeout_ * 60 * 1000 / postSnapCount_;    }    if (event & Task::kTimeoutEvent)    {           channels_ = NULL;           QTSS_RoleParams params;           params.easyNVRChannelsConfigParams.inChannels = NULL;           EasyNVRUtil::CallDispatch(Easy_NVRGetChannelsConfig_Role, QTSSModule::kGetChannelsConfigRole, params);           channels_ = static_cast<std::map<int, EasyNVRChannel*>*>(params.easyNVRChannelsConfigParams.inChannels);           postSnapCount_ = MAX_CHANNEL_COUNT;           for (int i = 0; i < MAX_CHANNEL_COUNT; i++)           {               snapCtrlArray_[i] = true;           }           this->Signal(Task::kUpdateEvent);        timeoutTask_.RefreshTimeout();    }    return 0;}

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