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This MVP release provides a complete full-stack solution for managing action mappings in Geutebruck's GeViScope and GeViSoft video surveillance systems. ## Features ### Flutter Web Application (Port 8081) - Modern, responsive UI for managing action mappings - Action picker dialog with full parameter configuration - Support for both GSC (GeViScope) and G-Core server actions - Consistent UI for input and output actions with edit/delete capabilities - Real-time action mapping creation, editing, and deletion - Server categorization (GSC: prefix for GeViScope, G-Core: prefix for G-Core servers) ### FastAPI REST Backend (Port 8000) - RESTful API for action mapping CRUD operations - Action template service with comprehensive action catalog (247 actions) - Server management (G-Core and GeViScope servers) - Configuration tree reading and writing - JWT authentication with role-based access control - PostgreSQL database integration ### C# SDK Bridge (gRPC, Port 50051) - Native integration with GeViSoft SDK (GeViProcAPINET_4_0.dll) - Action mapping creation with correct binary format - Support for GSC and G-Core action types - Proper Camera parameter inclusion in action strings (fixes CrossSwitch bug) - Action ID lookup table with server-specific action IDs - Configuration reading/writing via SetupClient ## Bug Fixes - **CrossSwitch Bug**: GSC and G-Core actions now correctly display camera/PTZ head parameters in GeViSet - Action strings now include Camera parameter: `@ PanLeft (Comment: "", Camera: 101028)` - Proper filter flags and VideoInput=0 for action mappings - Correct action ID assignment (4198 for GSC, 9294 for G-Core PanLeft) ## Technical Stack - **Frontend**: Flutter Web, Dart, Dio HTTP client - **Backend**: Python FastAPI, PostgreSQL, Redis - **SDK Bridge**: C# .NET 8.0, gRPC, GeViSoft SDK - **Authentication**: JWT tokens - **Configuration**: GeViSoft .set files (binary format) ## Credentials - GeViSoft/GeViScope: username=sysadmin, password=masterkey - Default admin: username=admin, password=admin123 ## Deployment All services run on localhost: - Flutter Web: http://localhost:8081 - FastAPI: http://localhost:8000 - SDK Bridge gRPC: localhost:50051 - GeViServer: localhost (default port) Generated with Claude Code (https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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================================================================================
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GeViScope_SDK.pdf - Pages 21 to 30
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================================================================================
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────────────────────────────────────────────────────────────────────────────────
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Page 21
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────────────────────────────────────────────────────────────────────────────────
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Backgroundinformation
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InGeViScopesystemsactionsareusedtocommunicatebetweentheGeViScopeserver
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andanyclientapplication.Allavailableactionscanbedividedintothreegroups:
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Notificationactions(forexample“UserLogin”),commandactions(forexample“Viewercon-
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nectlive”)andlogicalactions(theseactionsarenotdirectlycreatedbytheGeViScope
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serverandtheydon’tdirectlyresultinanyreactionintheGeViScopeserver,forexample
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“Customaction”).
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Allactionsaregroupedindifferentcategories.Thecategory“Vieweractions”containsall
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actionsthatarerelevantforremotecontrollingGSCView.
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TogetnotificationsaboutGSCViewactivities,oneoftheoptions“Sendnotificationactions”
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intheprofilemanagerofGSCViewhastobeset.Allpossiblenotificationactionsarecol-
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lectedintheactioncategory“Viewernotifications”.
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────────────────────────────────────────────────────────────────────────────────
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Page 22
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────────────────────────────────────────────────────────────────────────────────
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Moredetailedinformationaboutallavailableactionscanbefoundinthetopic“Actiondoc-
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umentation”(especiallyVieweractionsandViewernotifications).
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PleasebeawareofthefactthatGSCViewisworkinginanasynchronousmode.Ifacustom
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applicationsendsanaction,thatdependsontheresultoftheprevioussentactiontheremay
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betheneedforinsertingapausetimebeforesendingthesecondaction(e.g.sendaction
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“Viewerconnectlive”,waitonesecond,sendaction“Viewerprintpicture”).GSCViewdoes
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nothaveaninputqueueforremotecontrolactions.
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Supporteddevelopmentplatforms
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TheSDKisdesignedandtestedtobeusedwiththefollowingdevelopmentenvironments:
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l CodeGearC++Builder6©
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l CodeGearC++Builder2009©
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l CodeGearDelphi7©
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l CodeGearDelphi2005©
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l CodeGearDelphi2009©
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l MicrosoftVisualStudio2005,C++,MFC©
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l MicrosoftVisualStudio2008,C++,MFC©
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l MicrosoftVisualStudio2005,C++/CLI©
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l Microsoft.NET ©(wrapperclassesarecontainedinthe“Examples”folder)
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────────────────────────────────────────────────────────────────────────────────
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Page 23
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────────────────────────────────────────────────────────────────────────────────
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Guidelinesandhints
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Introduction
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ItisrecommendedtobefamiliarwiththeGeViScopesystemandthepossibilitiesofmodern
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videosurveillancesystemsandvideomanagementsystems.Beforestartingprogramming
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yourcustomGeViScopeclientyoushouldknowbasicsofvideoformats,videocom-
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pression,GeViScopeevents,GeViScopeactionsandtheprinciplesofaclient-servernet-
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workcommunication.
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ThefollowingsectionssupportyouwithsomesuggestionsandhintsaboutusingtheSDK
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interfaces.
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Generalhints
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IfyourapplicationneedstolistentoeventsandactionspleaseusetheapplicationPLCSim-
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ulator.exethatyoucanfindonYourGeViScopedevice.Thissoftwareallowsyoutostart
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actionsandeventswhichmightbeusedbyyourprogram.
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YoushouldworkanddosometestswitharealGeViScopedeviceorwiththevirtualtest
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environmentbelongingtotheSDK.Createsomeeventsandactions,startthemwith
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PLCSimulator.exe.
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StartingthesetupsoftwareGSCSetup.exewiththecommandlineparameter/utilitieswill
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offeryouthepossibilitytoopenDBITesttodiscoverthedatabasestructureandtoevaluate
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andtestselectstatementsagainstthedatabase.Additionallythistooloffersyouthepos-
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sibilitytostarttheregistryeditortoevaluatetheinternalstructureoftheGeViScopesetup.
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MakesuretodeleteallobjectsthatarecreatedinsideofDLLs.Theobjects
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themselvesshouldalwaysofferaDestroy()orFree()methodforthat.
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Callbackfunctions,whicharecalledoutoftheSDKDLLs,arecalledfromthreads,which
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werecreatedinsidetheDLLs.Variablesandpointersthatarepassedasargumentsofthe
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callbackmaynotbeusedoutsidethecallbackcontext.Theyareonlyvalidfortheduration
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ofthecallbackcall.
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StructuresthatareusedasargumentsforSDKfunctionsshouldalwaysbeinitializedbythe
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functionmemset().Aftersettingallthestructureelementstozero,thesizeorstructsizeele-
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menthastobeinitializedwiththesizeof()function.
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MPEG-2filesthatwerecreatedbySDKfunctionscanpossiblynotbeplayedwiththewin-
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dowsmediaplayer.ThereasonisamissingMPEG-2decoder.WerecommendusingDVD
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playersoftwarelikePowerDVDortheVCLMediaPlayersoftware.
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Workingwithhandlesandinstances
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IntegralpartoftheSDKareunitsthatgivetheuseracomfortableaccesstotheplainfunc-
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tionsoftheDLL,e.g.GSCDBI.h/.cpp/.pas.Intheseunitsclassesencapsulateaccessto
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instancesofobjectswhicharecreatedinsidetheDLL.Tohaveaccessfromoutsidethe
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DLL(customapplication)totheinsideresidinginstances,handlesareused.Theunitshave
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tobeaddedtotheprojectrespectivelytothesolutiontoavoidlinkererrors.
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────────────────────────────────────────────────────────────────────────────────
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Page 24
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────────────────────────────────────────────────────────────────────────────────
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Afterworkwithinstancesisfinished,theinstanceshavetobedeletedbycallingtheirdes-
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troy()orfree()method.Otherwisetherewillbememoryleaksleft.
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UsingtheplainexportedfunctionsoftheDLLisnotrecommended.Togetaccesstofull
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functionalityyoushouldusetheunitsinstead(pasfilesorh/cppfiles).
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Thefollowingexample(inpseudocode)shouldillustratetheabovefacts:
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//defineahandletoaserverobject
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HGscServerMyServer;
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//createaserverobjectinstanceinsidetheDLLand
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//getahandletoit
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MyServer=DBICreateRemoteserver();
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...
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//workwiththeobjectinstancewiththehelpofthehandle
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MyServer->Connect();
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...
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//defineahandletoaPLCobject
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HGscPLCPLC;
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//createaPLCobjectinstanceinsidetheDLLand
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//getahandletoit
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PLC=MyServer.CreatePLC();
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...
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//workwiththeobjectinstancewiththehelpofthehandle
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PLC->OpenPushCallback(...);
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...
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//destroyPLCobject
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PLC->Destroy();
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...
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//destroyserverobject
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MyServer->Destroy();
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InteractionbetweenDBIandMediaPlayer
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TheDBIinterfacegivesaccesstoGeViScopeserverfunctionality.Aftercreatingan
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instancewiththefunctionDBICreateRemoteserver()aconnectiontotheservercanbe
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establishedbycallingthemethodConnect()oftheserverobjectinstance.
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Thefollowingmethodsofaserverobjectinstancecanbecalledtogetaccesstodifferent
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kindsoffunctions(notacompletelist):
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────────────────────────────────────────────────────────────────────────────────
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Page 25
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────────────────────────────────────────────────────────────────────────────────
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Method Function
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CreateDataSet(),
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CreateDataPacket()
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Fetchdatafromserverdatabase
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CreateLiveStream() Fetchlivedatafromserver
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CreateRegistry() Fetchsetupdatafromserver(mediachannelinformation,event
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information,…)
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CreatePLC() Listento,createandsendactions
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Theexample(inpseudocode)ofthepreviouschaptershouldillustratetheabovefacts.
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TheMediaPlayerinterfaceofferssimpletouseobjectstodisplayliveandrecordedvideoin
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windowscontrols.Aviewerobjectinstanceneedstobecreatedbycalling
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GMPCreateViewer().Theviewerneedsahandletoawindowscontrolandahandletoa
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serverobjectinstance.Ithandlesfetchingdata,decompressingdataanddisplayingvideoin
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thelinkedwindowscontrolbyitself.
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Thefollowingmethodsofaviewerobjectinstancecanbecalledtogetaccesstodifferent
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kindsoffunctions(notacompletelist):
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Method Function
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ConnectDB() Fetchvideodatafromthedatabaseanddisplayitinanyplaymoderequired.
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Filterandsearchcriteriacanoptionallybedefined.
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SetPlayMode
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(pmPlayNextEvent)
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Displaythenextavailableeventpictures
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Thefollowingexample(inpseudocode)showshowtocreateavieweranduseitafter-
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wards:
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//defineahandletoaviewerobject
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HGscViewerMyViewer;
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//createaviewerobjectinstanceinsidetheDLLand
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//getahandletoit
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MyViewer=GMPCreateViewer(WindowHandle,...);
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//defineastructurewithdataneededtolink
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//theviewertoamediachannelintheserver
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TMPConnectDataMyViewerConnectData;
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//handletotheserverobjectinstance
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MyViewerConnectData.Connection=MyServer;
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MyViewerConnectData.ServerType=ctGSCServer;
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MyViewerConnectData.MediaType=mtServer;
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//IDofthemediachannelthatshouldbedisplayed
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MyViewerConnectData.MediaChID=...
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//linktheviewertoamediachannelanddisplaylivedata
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MyViewer->ConnectDB(MyViewerConnectData,pmPlayStream,...);
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//destroyviewerobject
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MyViewer->Destroy();
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BesidetheviewerobjectclassthereisanotherclassintheMediaPlayerinterface:Theoff-
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screenviewerobjectclass.Ifyouwanttodecompressmedia,whichshouldnotbe
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────────────────────────────────────────────────────────────────────────────────
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Page 26
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────────────────────────────────────────────────────────────────────────────────
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displayedwiththehelpoftheviewerobject,youcanusetheoffscreenviewerobject.An
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instancecanbecreatedwiththefunctionGMPCreateOffscreenViewer().Theoffscreen
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viewerobjectinstanceprovidesnearlythesamefunctionalityastheviewerobjectclass
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does.Thevideofootageisnotrenderedinawindow,itisdecompressedinaspecialDecom-
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pBufferobjectinstance.Afterthedecompressionisdoneinsidetheoffscreenviewer,the
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hostingapplicationcanbenotifiedwiththehelpofacallbackfunction.Insidethecallback
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thedecompressedimagecanbeaccessed.
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TheDecompBufferclassencapsulatesspecialfunctionsforeffectivedecompressing.Soit
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isrecommendtouseit.Creatinganinstanceofthebuffercanbereachedbycallingthefunc-
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tionGMPCreateDecompBuffer().Theinstancecanbeusedforasmanydecompressions
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asneeded.ThemethodGetBufPointer()givesaccesstotherawpicturedatainsidethebuf-
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fer.
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Hereisashortexample(inpseudocode)howtoworkwithanoffscreenviewerobject:
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//defineahandletoaDecompBufferobject
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HGscDecompBufferMyDecompBuffer;
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//createaDecompBufferobjectinstanceinsidetheDLLand
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//getahandletoit
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MyDecompBuffer=GMPCreateDecompBuffer();
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//defineahandletoaoffscreenviewerobject
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HGscViewerMyOffscreenViewer;
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//createanoffscreenviewerobjectinstanceinsidetheDLLand
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//getahandletoit
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MyOffscreenViewer=GMPCreateOffscreenViewer(MyDecompBuffer);
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//setcallbackoftheoffscreenviewerobject
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MyOffscreenViewer.SetNewOffscreenImageCallBack(NewOff-
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screenImageCallback);
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//defineastructurewithdataneededtolink
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//theoffscreenviewertoamediachannelintheserver
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TMPConnectDataMyOffscreenViewerConnectData;
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//handletotheserverobjectinstance
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MyOffscreenViewerConnectData.Connection=MyServer;
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MyOffscreenViewerConnectData.ServerType=ctGSCServer;
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MyOffscreenViewerConnectData.MediaType=mtServer;
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//IDofthemediachannelthatshouldbedecompressed
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MyOffscreenViewerConnectData.MediaChID=...
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//linktheoffscreenviewertoamediachannelanddecompresslivedata
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MyOffscreenViewer->ConnectDB(MyOffscreenViewerConnectData,pmPlayStream,
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...);
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...
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//destroyoffscreenviewerobject
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MyOffscreenViewer->Destroy();
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//destroyDecompBufferobject
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────────────────────────────────────────────────────────────────────────────────
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Page 27
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────────────────────────────────────────────────────────────────────────────────
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MyDecompBuffer->Destroy();
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...
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//callbackfunction,thatiscalledafterimageshavebeendecompressed
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...
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//getarawpointertothepictureintheDecompBuffer
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//object
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MyDecompBuffer->GetBufPointer(BufferPointer,...);
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//copythepictureintoawindowsbitmapresource
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//forexample
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SetDIBits(...,BitmapHandle,...,BufferPointer,...,DIB_RGB_COLORS);
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...
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Enumerationofsetupdata
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GeViScopeServerresourcescanbeenumeratedbycustomapplications.Thesetupobject,
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whichcanbeinstantiatedbycallingtheservermethodCreateRegistry(),offersfunctionality
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forthis.
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Enumerationofresourcesnormallyisdoneinfoursteps:
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1. DefineanarrayoftypeGSCSetupReadRequestwiththeonlyelement“/”.This
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causesthemethodReadNodes()totransferthewholesetupfromtheservertothe
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customapplication.
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2. CallthemethodReadNodes()ofthesetupobjecttogetthewholesetupfromthe
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server.
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3. CalloneoftheGet…()methodsofthesetupobjecttogetanarrayofGUIDsrep-
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resentingthelistofresources.TherearedifferentGet…()methods,e.g.GetMe-
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diaChannels()orGetEvents().
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4. UsetheGUIDarraytoreceivetheresourcesdatabycallingGet…Settings()meth-
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ods,e.g.GetMediaChannelSettings()orGetEventSettings().
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Hereisanexample(inpseudocode),thatshowshowtoenumeratethemediachannels:
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...
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//connecttotheserver
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MyServer->Connect();
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...
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//defineahandletoasetupobject
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HGscRegistryMySetup;
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//createasetupobjectinstanceinsidetheDLLand
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//getahandletoit
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MySetup=MyServer->CreateRegistry();
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//defineaarrayforthesetupreadrequest
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GscSetupReadRequestSetupReadRequest[1];
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SetupReadRequest[0].NodeName="/";
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────────────────────────────────────────────────────────────────────────────────
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Page 28
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────────────────────────────────────────────────────────────────────────────────
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//readthesetupdatafromtheserver
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MySetup->ReadNodes(&SetupReadRequest,...);
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//defineaGUIDarrayfortheGUIDsofthe
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//existingmediachannels
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GuidDynArrayMediaChannels;
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//gettheGUIDarrayoutofthesetupdata
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MySetup->GetMediaChannels(MediaChannels);
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//getthedataofeachsinglemediachannel
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foreachMediaChannelGUIDinMediaChannels
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MySetup->GetMediaChannelSettings(MediaChannelGUID,
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MediaChannelID,
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GlobalNumber,
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...);
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...
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//destroysetupobject
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MySetup->Destroy();
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//destroyserverobject
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MyServer->Destroy();
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...
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Pleasenotethatespeciallythemediachannelscanbeenumeratedbyusingtheglobalfunc-
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tionGMPQueryMediaChannelList()oftheMediaPlayerinterfaceaswell.
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PLC,actionsandevents
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ThePLC(PrcessLogicControl)objectsupportsyouwithfunctionalityforhandlingnoti-
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fications,actionsandevents.ThemethodCreatePLC()oftheserverobjectclasscreatesa
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handletoaPLCobjectinsidetheDBIDLL.
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ThefollowingmethodsofaPLCobjectinstancecanbecalledtogetaccesstodifferent
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kindsoffunctions(notacompletelist):
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Method Function
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SendAction() Sendanactiontotheconnectedserver
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StartEvent() Startaneventoftheconnectedserver
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SubscribeActions() Subscribealistofactionsthatshouldbenotifiedbyaregisteredcallback
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function
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OpenPushCallback
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()
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Registeracallbackfunction,thatiscalledifannotificationarrivesora
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eventstarts/stopsorifoneofthesubscribedactionsarrives
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ToreceiveNotificationsandactionsacallbackfunctioncanberegisteredwiththemethod
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OpenPushCallback().Afterreceivinganaction,theactionshouldbedecodedanddis-
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patchedbytheaninstanceoftheclassGSCActionDispatcher.Theactiondispatchergives
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youasimplewaytoreactonspecificactions.Hereisashortexample(inpseudocode):
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────────────────────────────────────────────────────────────────────────────────
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Page 29
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────────────────────────────────────────────────────────────────────────────────
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//initializationcode:
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...
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//connecttotheserver
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MyServer->Connect();
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...
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//defineahandletoaPLCobject
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HGSCPLCPLC;
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//createaPLCobjectinstanceinsidetheDLLand
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//getahandletoit
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PLC=MyServer.CreatePLC();
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...
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//linkyourcallbackfunctionforacustomaction
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//totheactiondispatcher,sothatthecallbackfunction
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//iscalledautomaticallyifacutsomactionarrives
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ActionDispatcher->OnCustomAction=this->MyCustomActionHandler;
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//registeracallbackfunctionfornotifications,
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//eventsandactions(thiscallbackfunctiondispatches
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//allreceivedactionswiththehelpofthe
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//GSCActionDispatcher)
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PLC->OpenPushCallback(...);
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...
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//destroyPLCobject
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PLC->Destroy();
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...
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//destroyserverobject
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MyServer->Destroy();
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//callbackfunctionforallnotifications,eventsand
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//subscribedactions:
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...
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//dispatchthereceivedactiontothelinked
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//callbackfunctions
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ActionDispatcher->Dispatch(ActionHandle);
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...
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MediachannelIDs
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TheexistingmediachannelscanbedisplayedbytheviewerobjectsoftheMediaPlayer
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interface.NormallythisisdonewiththemethodConnectDB().Thismethodneedsthe
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────────────────────────────────────────────────────────────────────────────────
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Page 30
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────────────────────────────────────────────────────────────────────────────────
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mediachannelIDtoidentifythemediachannel(camera)thatshouldbedisplayed.
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ThemediachannelIDsaregeneratedautomaticallybytheGeViScopeserver.Everycre-
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atedmediachannelgetsanIDthatisalwaysunique.Soifyouremovemediachannelsfrom
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thesetupandaddthemagain,theywillsurereceivesomenewIDs.
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ForthatreasonmediachannelsshouldnotbeaccessedbyconstantIDs.Itisrecommend
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usingglobalnumbersinstead,becausetheycanbechangedinthesetup.Tofindthefitting
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mediachannelIDforagivenglobalnumber,themediachannelsshouldbeenumeratedfrom
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theserversetup.Pleaserefertochapter“Enumerationofsetupdata”inthisdocumentto
|
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seehowthisisdone.
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Thereisasimilardifficultywithevents,digitalinputsandoutputs.Eventsdon’thaveglobal
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numbers.Heretheeventnameshouldbeusedinstead.
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Handlingconnectioncollapses
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ThecallbackOpenPushCallback()ofthePLCobjectenablestolistentodifferentkindsof
|
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notificationsfromthePLCobject.Oneisthe“plcnPushCallbackLost”notification.Itisfired
|
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ifaconnectionisinternallydetectedascollapsed.Asareactiononthiseventyoushould
|
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destroyorfreeallobjectsthatwerecreatedinsidetheDLLsandstartaphaseofreconnect
|
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tries.Thereconnecttriesshouldstartevery30secondsforexample.Additionallyyour
|
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applicationcanlistentoUDPbroadcaststhataresentbytheGeViScopeserver.Afteryour
|
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applicationreceivedthisbroadcastitcandirectlytrytoreconnecttotheserver.Pleasebe
|
||
awareofthefact,thatbroadcastsonlyworkinLAN–routersnormallyblockbroadcasts.
|
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UsingMediaPlayerwithGeViScopeandMULTISCOPEIII
|
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servers
|
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GenerallytheMediaPlayerinterfacecanbeusedwithGeViScopeaswellasMULTISCOPE
|
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IIIservers.Tolinktheserverconnectiontotheviewerobject,theconnectiondatastructure
|
||
hastobedefined.Thetypeofthestructureis“TMPConnectData”.Theelement“Server-
|
||
Type”identifiesthekindofserverwhosemediashouldbedisplayedintheviewer.
|
||
Pleasehavealookontheexample(inpseudocode)inthechapter“InteractionbetweenDBI
|
||
andMediaPlayer”inthisdocument.
|
||
Forcreatingdifferentkindofconnections,differentDLLshavetobeused.ForGeViScope
|
||
theDLL“GSCDBI.DLL”andforMULTISCOPEIIItheDLL“MscDBI.DLL”hastobe
|
||
includedintheprojectorsolutionofthecustomapplication.Theycancoexist.
|
||
HandlingaconnectiontoaMULTISCOPEIIIserverissimilartoGeViScope.Detailscanbe
|
||
foundintheMULTISCOPEIIISDKdocumentation.
|
||
UsingtheSDKwith.NET
|
||
TomaketheusageofthenativeWin32DLLseasierin.NETlanguageslikeC#orVB.NET,
|
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theSDKcontainssomewrapperassembliesaroundtheplainSDKDLLs.
|