private async Task InitializeCamera() { if (Options.UseFrontCameraIfAvailable.HasValue && Options.UseFrontCameraIfAvailable.Value) { try { var frontCameraCaptureResolutions = AudioVideoCaptureDevice.GetAvailableCaptureResolutions(CameraSensorLocation.Front); var resolution = GetResolution(frontCameraCaptureResolutions.OrderBy(r => r.Width * r.Height)); _photoCamera = await AudioVideoCaptureDevice.OpenForVideoOnlyAsync(CameraSensorLocation.Front, resolution); } catch (Exception ex) { MobileBarcodeScanner.Log("Failed to create front facing camera: {0}", ex); } } MobileBarcodeScanner.Log("InitializeCamera"); if (_photoCamera == null) { var backCameraCaptureResolutions = AudioVideoCaptureDevice.GetAvailableCaptureResolutions(CameraSensorLocation.Back); var resolution = GetResolution(backCameraCaptureResolutions.OrderBy(r => r.Width * r.Height)); _photoCamera = await AudioVideoCaptureDevice.OpenForVideoOnlyAsync(CameraSensorLocation.Back, resolution); } IsAnalyzing = true; OnPhotoCameraInitialized(this, new CameraOperationCompletedEventArgs(true, null)); MobileBarcodeScanner.Log("Wired up Initizialied"); }
private void OnPhotoCameraInitialized(object sender, CameraOperationCompletedEventArgs e) { MobileBarcodeScanner.Log("Initialized Camera"); if (_photoCamera == null) { return; } MobileBarcodeScanner.Log("Creating Luminance Source"); var width = Convert.ToInt32(_photoCamera.PreviewResolution.Width); var height = Convert.ToInt32(_photoCamera.PreviewResolution.Height); _luminance = new PhotoCameraLuminanceSource(width, height); var supportedCameraModes = AudioVideoCaptureDevice.GetSupportedPropertyValues(_photoCamera.SensorLocation, KnownCameraAudioVideoProperties.VideoTorchMode); if (supportedCameraModes.ToList().Contains((UInt32)VideoTorchMode.On)) { _photoCamera.SetProperty(KnownCameraAudioVideoProperties.VideoTorchMode, VideoTorchMode.Off); } _initialized = true; MobileBarcodeScanner.Log("Luminance Source Created"); OnCameraInitialized(_initialized); }
private void ReaderOnCameraInitialized(object sender, bool initialized) { // We dispatch (invoke) to avoid access exceptions Dispatcher.BeginInvoke(() => { // This must be called here - until now, _reader.Camera is null _previewVideo.SetSource(_reader.Camera); if (_reader != null && _previewTransform != null) { _previewTransform.Rotation = _reader.CameraOrientation; } }); MobileBarcodeScanner.Log("ReaderOnCameraInitialized"); if (_reader != null) { // We can set if Camera should flash or not when focused _reader.FlashMode = FlashMode.Off; // Starts the capturing process _reader.Start(); } }
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e) { try { isDeactivated = e.NavigationMode != NavigationMode.Back; OnRequestAutoFocus -= RequestAutoFocusHandler; OnRequestTorch -= RequestTorchHandler; OnRequestToggleTorch -= RequestToggleTorchHandler; OnRequestCancel -= RequestCancelHandler; OnRequestIsTorchOn -= RequestIsTorchOnHandler; OnRequestPauseAnalysis -= RequestPauseAnalysisHandler; OnRequestResumeAnalysis -= RequestResumeAnalysisHandler; scannerControl.StopScanning(); if (!ContinuousScanning) { RaiseEmptyResult(); } } catch (Exception ex) { MobileBarcodeScanner.Log("OnNavigatingFrom Error: {0}", ex); } base.OnNavigatingFrom(e); }
private void OnPhotoCameraInitialized(object sender, CameraOperationCompletedEventArgs e) { MobileBarcodeScanner.Log("Initialized Camera"); if (_photoCamera == null) { return; } MobileBarcodeScanner.Log("Creating Luminance Source"); var width = Convert.ToInt32(_photoCamera.PreviewResolution.Width); var height = Convert.ToInt32(_photoCamera.PreviewResolution.Height); _luminance = new PhotoCameraLuminanceSource(width, height); if (_photoCamera.IsFlashModeSupported(FlashMode.On)) { _photoCamera.FlashMode = FlashMode.Off; } _initialized = true; MobileBarcodeScanner.Log("Luminance Source Created"); OnCameraInitialized(_initialized); }
protected override async void OnNavigatingFrom(NavigatingCancelEventArgs e) { try { MobileBarcodeScanner.Log("OnNavigatingFrom, stopping camera..."); await scannerControl.StopScanningAsync(); } catch (Exception ex) { MobileBarcodeScanner.Log("OnNavigatingFrom Error: {0}", ex); } base.OnNavigatingFrom(e); }
public void StartScanning(Action <ZXing.Result> scanCallback, MobileBarcodeScanningOptions options = null) { ScanCallback = scanCallback; ScanningOptions = options ?? MobileBarcodeScanningOptions.Default; this.topText.Text = TopText; this.bottomText.Text = BottomText; if (UseCustomOverlay) { gridCustomOverlay.Children.Clear(); if (CustomOverlay != null) { gridCustomOverlay.Children.Add(CustomOverlay); } gridCustomOverlay.Visibility = Visibility.Visible; gridDefaultOverlay.Visibility = Visibility.Collapsed; } else { gridCustomOverlay.Visibility = Visibility.Collapsed; gridDefaultOverlay.Visibility = Visibility.Visible; } MobileBarcodeScanner.Log("ZXingScannerControl.StartScanning"); // Initialize a new instance of SimpleCameraReader with Auto-Focus mode on if (_reader == null) { MobileBarcodeScanner.Log("Creating SimpleCameraReader"); //_reader = new SimpleCameraReader(options); _reader = new AudioVideoCaptureDeviceCameraReader(options); _reader.ScanInterval = ScanningOptions.DelayBetweenAnalyzingFrames; // AudioVideoCaptureDevice - move this to camera initialized otherwise throws // We need to set the VideoBrush we're going to display the preview feed on // IMPORTANT that it gets set before Camera initializes //_previewVideo.SetSource(_reader.Camera); // The reader throws an event when a result is available _reader.DecodingCompleted += (o, r) => DisplayResult(r); // The reader throws an event when the camera is initialized and ready to use _reader.CameraInitialized += ReaderOnCameraInitialized; } }
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e) { try { OnRequestAutoFocus -= RequestAutoFocusHandler; OnRequestTorch -= RequestTorchHandler; OnRequestToggleTorch -= RequestToggleTorchHandler; OnRequestCancel -= RequestCancelHandler; OnRequestIsTorchOn -= RequestIsTorchOnHandler; scannerControl.StopScanning(); } catch (Exception ex) { MobileBarcodeScanner.Log("OnNavigatingFrom Error: {0}", ex); } base.OnNavigatingFrom(e); }
private void InitializeCamera() { if (Options.UseFrontCameraIfAvailable.HasValue && Options.UseFrontCameraIfAvailable.Value) { try { _photoCamera = new PhotoCamera(CameraType.FrontFacing); } catch (Exception ex) { MobileBarcodeScanner.Log("Failed to create front facing camera: {0}", ex); } } MobileBarcodeScanner.Log("InitializeCamera"); if (_photoCamera == null) { _photoCamera = new PhotoCamera(); } _photoCamera.Initialized += OnPhotoCameraInitialized; MobileBarcodeScanner.Log("Wired up Initizialied"); }
protected override async void OnNavigatingFrom(NavigatingCancelEventArgs e) { try { OnRequestAutoFocus -= RequestAutoFocusHandler; OnRequestTorch -= RequestTorchHandler; OnRequestToggleTorch -= RequestToggleTorchHandler; OnRequestCancel -= ScanPage_OnRequestCancel; OnRequestIsTorchOn -= RequestIsTorchOnHandler; OnRequestPauseAnalysis -= RequestPauseAnalysisHandler; OnRequestResumeAnalysis -= RequestResumeAnalysisHandler; await scannerControl.StopScanningAsync(); } catch (Exception ex) { MobileBarcodeScanner.Log("OnNavigatingFrom Error: {0}", ex); } base.OnNavigatingFrom(e); }
public async Task StartScanningAsync(Action <ZXing.Result> scanCallback, MobileBarcodeScanningOptions options = null) { if (stopping) { var error = "Camera is closing"; OnScannerError?.Invoke(new[] { error }); return; } displayRequest.RequestActive(); isAnalyzing = true; ScanCallback = scanCallback; ScanningOptions = options ?? MobileBarcodeScanningOptions.Default; topText.Text = TopText ?? string.Empty; bottomText.Text = BottomText ?? string.Empty; if (UseCustomOverlay) { gridCustomOverlay.Children.Clear(); if (CustomOverlay != null) { gridCustomOverlay.Children.Add(CustomOverlay); } gridCustomOverlay.Visibility = Visibility.Visible; gridDefaultOverlay.Visibility = Visibility.Collapsed; } else { gridCustomOverlay.Visibility = Visibility.Collapsed; gridDefaultOverlay.Visibility = Visibility.Visible; } // Find which device to use var preferredCamera = await GetFilteredCameraOrDefaultAsync(ScanningOptions); if (preferredCamera == null) { var error = "No camera available"; System.Diagnostics.Debug.WriteLine(error); isMediaCaptureInitialized = false; OnScannerError?.Invoke(new[] { error }); return; } if (preferredCamera.EnclosureLocation == null || preferredCamera.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Unknown) { // No information on the location of the camera, assume it's an external camera, not integrated on the device. externalCamera = true; } else { // Camera is fixed on the device. externalCamera = false; // Only mirror the preview if the camera is on the front panel. mirroringPreview = preferredCamera.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Front; } mediaCapture = new MediaCapture(); // Initialize the capture with the settings above try { await mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings { StreamingCaptureMode = StreamingCaptureMode.Video, VideoDeviceId = preferredCamera.Id }); isMediaCaptureInitialized = true; } catch (UnauthorizedAccessException) { System.Diagnostics.Debug.WriteLine("Denied access to the camera"); } catch (Exception ex) { System.Diagnostics.Debug.WriteLine("Exception when init MediaCapture: {0}", ex); } if (!isMediaCaptureInitialized) { var error = "Unexpected error on Camera initialisation"; OnScannerError?.Invoke(new[] { error }); return; } // Set the capture element's source to show it in the UI captureElement.Source = mediaCapture; captureElement.FlowDirection = mirroringPreview ? FlowDirection.RightToLeft : FlowDirection.LeftToRight; try { // Start the preview await mediaCapture.StartPreviewAsync(); } catch (Exception ex) { var error = "Unexpected error on Camera initialisation"; OnScannerError?.Invoke(new[] { error }); return; } if (mediaCapture.CameraStreamState == CameraStreamState.Streaming) { OnCameraInitialized?.Invoke(); } // Get all the available resolutions for preview var availableProperties = mediaCapture.VideoDeviceController.GetAvailableMediaStreamProperties(MediaStreamType.VideoPreview); var availableResolutions = new List <CameraResolution>(); foreach (var ap in availableProperties) { var vp = (VideoEncodingProperties)ap; System.Diagnostics.Debug.WriteLine("Camera Preview Resolution: {0}x{1}", vp.Width, vp.Height); availableResolutions.Add(new CameraResolution { Width = (int)vp.Width, Height = (int)vp.Height }); } CameraResolution previewResolution = null; if (ScanningOptions.CameraResolutionSelector != null) { previewResolution = ScanningOptions.CameraResolutionSelector(availableResolutions); } if (availableResolutions == null || availableResolutions.Count < 1) { var error = "Camera is busy. Try to close all applications that use camera."; OnScannerError?.Invoke(new[] { error }); return; } // If the user did not specify a resolution, let's try and find a suitable one if (previewResolution == null) { // Loop through all supported sizes foreach (var sps in availableResolutions) { // Find one that's >= 640x360 but <= 1000x1000 // This will likely pick the *smallest* size in that range, which should be fine if (sps.Width >= 640 && sps.Width <= 1000 && sps.Height >= 360 && sps.Height <= 1000) { previewResolution = new CameraResolution { Width = sps.Width, Height = sps.Height }; break; } } } if (previewResolution == null) { previewResolution = availableResolutions.LastOrDefault(); } if (previewResolution == null) { System.Diagnostics.Debug.WriteLine("No preview resolution available. Camera may be in use by another application."); return; } MobileBarcodeScanner.Log("Using Preview Resolution: {0}x{1}", previewResolution.Width, previewResolution.Height); // Find the matching property based on the selection, again var chosenProp = availableProperties.FirstOrDefault(ap => ((VideoEncodingProperties)ap).Width == previewResolution.Width && ((VideoEncodingProperties)ap).Height == previewResolution.Height); // Pass in the requested preview size properties // so we can set them at the same time as the preview rotation // to save an additional set property call await SetPreviewRotationAsync(chosenProp); // *after* the preview is setup, set this so that the UI layout happens // otherwise the preview gets stuck in a funny place on screen captureElement.Stretch = Stretch.UniformToFill; await SetupAutoFocus(); var zxing = ScanningOptions.BuildBarcodeReader(); timerPreview = new Timer(async(state) => { var delay = ScanningOptions.DelayBetweenAnalyzingFrames; if (stopping || processing || !isAnalyzing || (mediaCapture == null || mediaCapture.CameraStreamState != Windows.Media.Devices.CameraStreamState.Streaming)) { timerPreview.Change(delay, Timeout.Infinite); return; } processing = true; SoftwareBitmapLuminanceSource luminanceSource = null; try { // Get preview var frame = await mediaCapture.GetPreviewFrameAsync(videoFrame); // Create our luminance source luminanceSource = new SoftwareBitmapLuminanceSource(frame.SoftwareBitmap); } catch (Exception ex) { MobileBarcodeScanner.Log("GetPreviewFrame Failed: {0}", ex); } ZXing.Result result = null; try { // Try decoding the image if (luminanceSource != null) { result = zxing.Decode(luminanceSource); } } catch (Exception ex) { MobileBarcodeScanner.Log("Warning: zxing.Decode Failed: {0}", ex); } // Check if a result was found if (result != null && !string.IsNullOrEmpty(result.Text)) { if (!ContinuousScanning) { delay = Timeout.Infinite; await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async() => { await StopScanningAsync(); }); } else { delay = ScanningOptions.DelayBetweenContinuousScans; } LastScanResult = result; ScanCallback(result); } processing = false; timerPreview.Change(delay, Timeout.Infinite); }, null, ScanningOptions.InitialDelayBeforeAnalyzingFrames, Timeout.Infinite); }