Method EventCallback

ETLTrimmer/main.cpp:143–173

public:
    EventCallback(bool infoOnly, std::shared_ptr<Filter> pFilter, bool trimState, bool byId, bool listProcesses)
        :
        mode_{ infoOnly ? Mode::Analysis : Mode::Trim },
        pFilter_{ std::move(pFilter) },
        trimState_{ trimState },
        byId_{ byId },
        listProcesses_{ listProcesses }
    {
        // when trimming by timestamp, we must take care not to remove the state data psuedo-events generated
        // at the beginning of the trace (also true state events coming before the trim region)
        // nt process
        stateFilter_.ProviderEnabled(NT_Process::GUID, 0, 0, EnableAllLevels, EVENT_CONTROL_CODE_ENABLE_PROVIDER);
        // dxgkrnl --> DCs
        stateFilter_.EventAdded(Microsoft_Windows_DxgKrnl::Context_DCStart::Id);
        stateFilter_.EventAdded(Microsoft_Windows_DxgKrnl::Device_DCStart::Id);
        //         --> Contexts
        stateFilter_.EventAdded(Microsoft_Windows_DxgKrnl::Context_Start::Id);
        stateFilter_.EventAdded(Microsoft_Windows_DxgKrnl::Context_Stop::Id);
        //         --> Devices
        stateFilter_.EventAdded(Microsoft_Windows_DxgKrnl::Device_Start::Id);
        stateFilter_.EventAdded(Microsoft_Windows_DxgKrnl::Device_Stop::Id);
        //         --> hwqueue starts
        stateFilter_.EventAdded(Microsoft_Windows_DxgKrnl::HwQueue_DCStart::Id);
        stateFilter_.EventAdded(Microsoft_Windows_DxgKrnl::HwQueue_Start::Id);
        // <-- finish
        stateFilter_.ProviderEnabled(Microsoft_Windows_DxgKrnl::GUID, 0, 0, EnableAllLevels, EVENT_CONTROL_CODE_ENABLE_PROVIDER);
        // kernel proc start/stop
        stateFilter_.EventAdded(Microsoft_Windows_Kernel_Process::ProcessStart_Start::Id);
        stateFilter_.EventAdded(Microsoft_Windows_Kernel_Process::ProcessStop_Stop::Id);
        stateFilter_.ProviderEnabled(Microsoft_Windows_Kernel_Process::GUID, 0, 0, EnableAllLevels, EVENT_CONTROL_CODE_ENABLE_PROVIDER);
    }
    STDMETHODIMP QueryInterface(const IID& iid, void** pObj)
    {
        if (iid == IID_IUnknown) {