private async Task InitializeCameraAsync()

in Tools/Cam360/MainPage.xaml.cs [475:531]
46 lines of code
8 McCabe index (conditional complexity)

        private async Task InitializeCameraAsync()
        {
            try
            {
                Debug.WriteLine("InitializeCameraAsync");

                if (_mediaCapture == null)
                {
                    //retrieve all camera sources on the system
                    IReadOnlyList<MediaFrameSourceGroup> allGroups = await MediaFrameSourceGroup.FindAllAsync();
                    List<MediaFrameSourceGroup> allGroupsList = allGroups.ToList();
                    string audioDeviceSelectorString = MediaDevice.GetAudioCaptureSelector();
                    
                    // list all sources for debugging
                    foreach (var sourceGroup in allGroupsList)
                    {
                        Debug.WriteLine($"{ sourceGroup.DisplayName}");
                        List<MediaFrameSourceInfo> sourceInfo = sourceGroup.SourceInfos.ToList();
                        var names = Enum.GetNames(typeof(MediaFrameSourceKind));
                        var streamTypes = Enum.GetNames(typeof(MediaStreamType));
                        foreach (var info in sourceInfo)
                        {
                            Debug.WriteLine($" {info.DeviceInformation.Name} ---- { names[(int)info.SourceKind]} -- {streamTypes[(int)info.MediaStreamType]}");
                        }
                    }
                    //select only the sources which have have a color (non-IR/non-depth) video preview or video record stream
                    _mediaFrameSourceGroupList = allGroupsList.Where(group => group.SourceInfos.Any(sourceInfo => sourceInfo.SourceKind == MediaFrameSourceKind.Color 
                                                                                                                  && (sourceInfo.MediaStreamType == MediaStreamType.VideoPreview 
                                                                                                                      || sourceInfo.MediaStreamType == MediaStreamType.VideoRecord))).ToList();
                    // find all audio record sources.
                    _microphoneList = await DeviceInformation.FindAllAsync(audioDeviceSelectorString);

                    // retrieve all physical cameras device information.
                    _cameraList = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);

                    if (_mediaFrameSourceGroupList.Count > 0)
                    {
                        // list all selectable sources into the drop down list for user
                        var cameraNamesList = _mediaFrameSourceGroupList.Select(group => group.DisplayName);
                        cmbCamera.ItemsSource = cameraNamesList;
                        cmbCamera.SelectedIndex = 0;

                        await EnableDisableCameraControlsOnUI(true);
                    }
                    else
                    {
                        string errorMessage = "No camera device found!";
                        Debug.WriteLine(errorMessage);
                        throw (new Exception(errorMessage));
                    }
                }
            }
            catch (Exception ex)
            {
                TraceExceptionAsync(ex);
            }
        }