| public StartPreviewAsync ( ) : IAsyncAction | ||
| Résultat | IAsyncAction | |
private async Task intializeCamera()
{
if (captureManager == null)
{
captureManager = new MediaCapture();
await captureManager.InitializeAsync();
}
capturePreview.Source = captureManager;
await captureManager.StartPreviewAsync();
try
{
play("This is add product page");
}
catch (System.IO.FileNotFoundException)
{
var messageDialog = new Windows.UI.Popups.MessageDialog("Media player components unavailable");
await messageDialog.ShowAsync();
}
catch (Exception)
{
media.AutoPlay = false;
var messageDialog = new Windows.UI.Popups.MessageDialog("Unable to synthesize text");
await messageDialog.ShowAsync();
}
}
private async void This_Loaded( object sender, RoutedEventArgs e )
{
try
{
_camera = new MediaCapture();
await _camera.InitializeAsync( new MediaCaptureInitializationSettings
{
VideoDeviceId = ( await GetBackCameraAsync() ).Id,
StreamingCaptureMode = StreamingCaptureMode.Video,
PhotoCaptureSource = PhotoCaptureSource.VideoPreview
} );
_camera.VideoDeviceController.FlashControl.Enabled = false;
_camera.SetPreviewRotation( VideoRotation.Clockwise90Degrees );
_camera.SetRecordRotation( VideoRotation.Clockwise90Degrees );
CameraPreview.Source = _camera;
await _camera.StartPreviewAsync();
StartScanning();
}
catch
{
ErrorMessage.Visibility = Visibility.Visible;
}
}
private async Task GetCapturePreview()
{
_capture = new MediaCapture();
var Videodevices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
//var rearCamera = Videodevices.FirstOrDefault(item => item.EnclosureLocation != null && item.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Back);
var frontCamera = Videodevices.FirstOrDefault(item => item.EnclosureLocation != null && item.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Front);
//TODO: カメラを切り替えられるようにする。
try
{
await _capture.InitializeAsync(new MediaCaptureInitializationSettings
{
VideoDeviceId = frontCamera.Id
});
}
catch (Exception ex)
{
var message = new MessageDialog(ex.Message, "おや？なにかがおかしいようです。");
await message.ShowAsync();
}
capturePreview.Source = _capture;
await _capture.StartPreviewAsync();
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
Status.Text = "Status: " + "App started";
//compass
var compass = Windows.Devices.Sensors.Compass.GetDefault();
compass.ReportInterval = 10;
//compass.ReadingChanged += compass_ReadingChanged;
Status.Text = "Status: " + "Compass started";
//geo
var gloc = new Geolocator();
gloc.GetGeopositionAsync();
gloc.ReportInterval = 60000;
gloc.PositionChanged += gloc_PositionChanged;
Status.Text = "Status: " + "Geo started";
//Accelerometer
var aclom = Accelerometer.GetDefault();
aclom.ReportInterval = 1;
aclom.ReadingChanged += aclom_ReadingChanged;
//foursquare
await GetEstablishmentsfromWed();
//camera
var mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync();
CaptureElement.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
Status.Text = "Status: " + "Camera feed running";
}
private async void Loaded(object sender, RoutedEventArgs e)
{
MediaCapture capMana = new MediaCapture();
await capMana.InitializeAsync();
Webcam_Logitech.Source = capMana;
await capMana.StartPreviewAsync();
}
async private void Start_Capture_Preview_Click(object sender, RoutedEventArgs e)
{
captureManager = new MediaCapture(); //Define MediaCapture object
await captureManager.InitializeAsync(); //Initialize MediaCapture and
capturePreview.Source = captureManager; //Start preiving on CaptureElement
await captureManager.StartPreviewAsync(); //Start camera capturing
}
public async Task StartPreviewAsync(VideoRotation videoRotation)
{
try
{
if (mediaCapture == null)
{
var cameraDevice = await FindCameraDeviceByPanelAsync(Panel.Back);
mediaCapture = new MediaCapture();
var settings = new MediaCaptureInitializationSettings { VideoDeviceId = cameraDevice.Id };
await mediaCapture.InitializeAsync(settings);
captureElement.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
isPreviewing = true;
mediaCapture.SetPreviewRotation(videoRotation);
displayRequest.RequestActive();
}
//DisplayInformation.AutoRotationPreferences = DisplayOrientations.Landscape;
}
catch (UnauthorizedAccessException)
{
// This will be thrown if the user denied access to the camera in privacy settings
Debug.WriteLine("The app was denied access to the camera");
}
catch (Exception ex)
{
Debug.WriteLine("MediaCapture initialization failed. {0}", ex.Message);
}
}
internal async void btnStartPreview_Click(Object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
m_bPreviewing = false;
try
{
ShowStatusMessage("Starting preview");
EnableButton(false, "StartPreview");
previewCanvas1.Visibility = Windows.UI.Xaml.Visibility.Visible;
previewElement1.Source = m_mediaCaptureMgr;
await m_mediaCaptureMgr.StartPreviewAsync();
if ((m_mediaCaptureMgr.VideoDeviceController.Brightness != null) && m_mediaCaptureMgr.VideoDeviceController.Brightness.Capabilities.Supported)
{
SetupVideoDeviceControl(m_mediaCaptureMgr.VideoDeviceController.Brightness, sldBrightness);
}
if ((m_mediaCaptureMgr.VideoDeviceController.Contrast != null) && m_mediaCaptureMgr.VideoDeviceController.Contrast.Capabilities.Supported)
{
SetupVideoDeviceControl(m_mediaCaptureMgr.VideoDeviceController.Contrast, sldContrast);
}
m_bPreviewing = true;
ShowStatusMessage("Start preview successful");
}
catch (Exception exception)
{
m_bPreviewing = false;
previewElement1.Source = null;
EnableButton(true, "StartPreview");
ShowExceptionMessage(exception);
}
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
if (_mediaCapture == null)
{
// Attempt to get te back camera if one is available, but use any camera device if not
var allVideoDevices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
DeviceInformation desiredDevice = allVideoDevices.FirstOrDefault(
x => x.EnclosureLocation != null & x.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Back);
var cameraDevice = desiredDevice ?? allVideoDevices.FirstOrDefault();
if (cameraDevice == null)
{
// TODO: Implement an error experience for camera-less devices
Debug.Write("No camera device found.");
return;
}
// Create MediaCapture and its setings
_mediaCapture = new MediaCapture();
var settings = new MediaCaptureInitializationSettings { VideoDeviceId = cameraDevice.Id };
// TODO: Implement an error experience for non-authorized case
await _mediaCapture.InitializeAsync(settings);
// Startin the preview
PreviewControl.Source = _mediaCapture;
await _mediaCapture.StartPreviewAsync();
}
}
private async void Grid_Loaded(object sender, RoutedEventArgs e)
{
var camera = (await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture)).FirstOrDefault();
if (camera != null)
{
mediaCapture = new MediaCapture();
var settings = new MediaCaptureInitializationSettings() { VideoDeviceId = camera.Id };
await mediaCapture.InitializeAsync(settings);
displayRequest.RequestActive();
VideoPreview.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
memStream = new InMemoryRandomAccessStream();
MediaEncodingProfile mediaEncodingProfile = MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Auto);
await mediaCapture.StartRecordToStreamAsync(mediaEncodingProfile, memStream);
}
//video = await captureUI.CaptureFileAsync(CameraCaptureUIMode.Video);
//if (video!=null)
//{
// MediaClip mediaClip = await MediaClip.CreateFromFileAsync(video);
// mediaComposition.Clips.Add(mediaClip);
// mediaStreamSource = mediaComposition.GeneratePreviewMediaStreamSource(600, 600);
// VideoPreview.SetMediaStreamSource(mediaStreamSource);
//}
//FFMPEGHelper.RTMPEncoder encoder = new FFMPEGHelper.RTMPEncoder();
//encoder.Initialize("rtmp://youtube.co");
}
private async void MainPage_Loaded(object sender, RoutedEventArgs e)
{
mediaCapture = new MediaCapture();
DeviceInformationCollection devices =
await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
// Use the front camera if found one
if (devices == null) return;
DeviceInformation info = devices[0];
foreach (var devInfo in devices)
{
if (devInfo.Name.ToLowerInvariant().Contains("front"))
{
info = devInfo;
frontCam = true;
continue;
}
}
await mediaCapture.InitializeAsync(
new MediaCaptureInitializationSettings
{
VideoDeviceId = info.Id
});
captureElement.Source = mediaCapture;
captureElement.FlowDirection = frontCam ? FlowDirection.RightToLeft : FlowDirection.LeftToRight;
await mediaCapture.StartPreviewAsync();
DisplayInformation displayInfo = DisplayInformation.GetForCurrentView();
displayInfo.OrientationChanged += DisplayInfo_OrientationChanged;
DisplayInfo_OrientationChanged(displayInfo, null);
}
private async Task StartCamera()
{
var source = new Windows.Media.Capture.MediaCapture();
try
{
//Use a specific camera
var cameraId = await FindRearFacingCamera();
if (!string.IsNullOrEmpty(cameraId))
{
var settings = new MediaCaptureInitializationSettings();
settings.VideoDeviceId = cameraId;
settings.StreamingCaptureMode = StreamingCaptureMode.Video;
await source.InitializeAsync(settings);
PreviewScreen.Source = source;
//Start video preview
await source.StartPreviewAsync();
}
}
catch
{
}
}
/// <summary>
/// This is the click handler for the 'StartPreview' button.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void StartPreview_Click(object sender, RoutedEventArgs e)
{
try
{
// Check if the machine has a webcam
DeviceInformationCollection devices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
if (devices.Count > 0)
{
rootPage.NotifyUser("", NotifyType.ErrorMessage);
if (mediaCaptureMgr == null)
{
// Using Windows.Media.Capture.MediaCapture APIs to stream from webcam
mediaCaptureMgr = new MediaCapture();
await mediaCaptureMgr.InitializeAsync();
VideoStream.Source = mediaCaptureMgr;
await mediaCaptureMgr.StartPreviewAsync();
previewStarted = true;
ShowSettings.Visibility = Visibility.Visible;
StartPreview.IsEnabled = false;
}
}
else
{
rootPage.NotifyUser("A webcam is required to run this sample.", NotifyType.ErrorMessage);
}
}
catch (Exception ex)
{
mediaCaptureMgr = null;
rootPage.NotifyUser(ex.Message, NotifyType.ErrorMessage);
}
}
private async Task Initialize()
{
captureManager = new MediaCapture();
await captureManager.InitializeAsync();
capturePreview.Source = captureManager;
await captureManager.StartPreviewAsync();
}
async private void IniciaPreviaCapturaFoto(object sender, RoutedEventArgs e)
{
GerenteCaptura = new Windows.Media.Capture.MediaCapture();
await GerenteCaptura.InitializeAsync();
GerenteCaptura.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
CapturaPrevia.Source = GerenteCaptura;
await GerenteCaptura.StartPreviewAsync();
}
private async Task Init()
{
MC = new MediaCapture();
var cameras = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
var camera = cameras.First();
var settings = new MediaCaptureInitializationSettings() { VideoDeviceId = camera.Id };
await MC.InitializeAsync(settings);
ViewFinder.Source = MC;
await MC.StartPreviewAsync();
}
async void InitCapture()
{
captureMgr = new Windows.Media.Capture.MediaCapture();
await captureMgr.InitializeAsync();
capturePreview.Source = captureMgr;
await captureMgr.StartPreviewAsync();
}
private async void profilePicture_Tapped(object sender, TappedRoutedEventArgs e)
{
mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync();
stackPreview.Visibility = Visibility.Visible;
previewElement.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
}
async void InitCamera()
{
mc = new MediaCapture();
var cameras = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
var camera = cameras[1];
var settings = new MediaCaptureInitializationSettings() { VideoDeviceId = camera.Id };
await mc.InitializeAsync(settings);
ce.Source = mc;
await mc.StartPreviewAsync();
}
async void MainPage_Loaded(object sender, RoutedEventArgs e)
{
mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync();
CaptureElement.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
urhoApp = UrhoSurface.Run<UrhoApp>();
urhoApp.CaptureVideo(CaptureFrameAsync);
}
private async void InitializeCamera()
{
if (captureManager == null)
{
captureManager = new MediaCapture();
await captureManager.InitializeAsync();
PhotoCaptureElement.Source = captureManager;
await captureManager.StartPreviewAsync();
}
}
async void RecordAndRotate(MediaCapture captureMgr)
{
captureMgr = new MediaCapture();
await captureMgr.InitializeAsync();
// <SnippetCaptureRotateSetRecordRotate>
//captureMgr.SetRecordRotation(VideoRotation.Clockwise90Degrees);
// </SnippetCaptureRotateSetRecordRotate>
capturePreview.Source = captureMgr;
await captureMgr.StartPreviewAsync();
}
private async Task<bool> InitMediaCapture()
{
_captureManager = new MediaCapture();
await _captureManager.InitializeAsync();
captureElement.Source = _captureManager;
captureElement.FlowDirection = FlowDirection.RightToLeft;
// start capture preview
await _captureManager.StartPreviewAsync();
return true;
}
// Start the Video Capture
private async void StartMediaCaptureSession()
{
var storageFile = await Windows.Storage.KnownFolders.VideosLibrary.CreateFileAsync("cameraCapture.wmv", Windows.Storage.CreationCollisionOption.GenerateUniqueName);
fileName = storageFile.Name;
await mediaCapture.StartRecordToStorageFileAsync(profile, storageFile);
recording = true;
// start the preview
capturePreview.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
}
private async void InitializeCamera()
{
var videoDevices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
var rearCamera = videoDevices.First(item => item.EnclosureLocation != null &&
item.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Back);
_captureManager = new MediaCapture();
await _captureManager.InitializeAsync(new MediaCaptureInitializationSettings
{
VideoDeviceId = rearCamera.Id
});
capturePreview.Source = _captureManager;
await _captureManager.StartPreviewAsync();
}
public async Task InitializeAsync()
{
// Discover all the cameras
await EnumerateCamerasAsync();
// Create a camera preview image source (from Imaging SDK)
captureManager = new MediaCapture();
MediaCaptureInitializationSettings captureSettings = new MediaCaptureInitializationSettings();
captureSettings.VideoDeviceId = backCamera.Id;
await captureManager.InitializeAsync(captureSettings);
CameraPreview.Source = captureManager;
captureManager.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
await captureManager.StartPreviewAsync();
}
private async void FaceComp_Loaded(object sender, RoutedEventArgs e)
{
var cameraID = await GetCameraID(Windows.Devices.Enumeration.Panel.Back);
takePhotoManager = new MediaCapture();
await takePhotoManager.InitializeAsync(new MediaCaptureInitializationSettings
{
StreamingCaptureMode = StreamingCaptureMode.Video,
//PhotoCaptureSource = PhotoCaptureSource.Photo,
AudioDeviceId = string.Empty,
VideoDeviceId = cameraID.Id
});
await takePhotoManager.ClearEffectsAsync(MediaStreamType.Photo);
PhotoPreview.Source = takePhotoManager;
await takePhotoManager.StartPreviewAsync();
}
private async void Button_Click(object sender, RoutedEventArgs e)
{
// Create new MediaCapture
MyMediaCapture = new MediaCapture();
await MyMediaCapture.InitializeAsync();
// Assign to Xaml CaptureElement.Source and start preview
myCaptureElement.Source = MyMediaCapture;
// show preview
await MyMediaCapture.StartPreviewAsync();
}
async private void IniciaPreviaCapturaFoto(object sender, RoutedEventArgs e)
{
GerenteCaptura = new Windows.Media.Capture.MediaCapture();
var cameraID = await GetCameraID(Windows.Devices.Enumeration.Panel.Front);
await GerenteCaptura.InitializeAsync(new MediaCaptureInitializationSettings
{
StreamingCaptureMode = StreamingCaptureMode.Video,
PhotoCaptureSource = PhotoCaptureSource.Photo,
AudioDeviceId = string.Empty,
VideoDeviceId = cameraID.Id,
});
GerenteCaptura.SetPreviewRotation(VideoRotation.Clockwise270Degrees);
CapturaPrevia.Source = GerenteCaptura;
await GerenteCaptura.StartPreviewAsync();
}
public async void startPreview()
{
_mediaCapture = new Windows.Media.Capture.MediaCapture();
(App.Current as App).MediaCapture = _mediaCapture;
await _mediaCapture.InitializeAsync();
CreateProfile();
TurnMirroringOn();
// <SnippetMediaCaptureVideo_StartPreview>
// Start Previewing
await _mediaCapture.StartPreviewAsync();
(App.Current as App).IsPreviewing = true;
// </SnippetMediaCaptureVideo_StartPreview>
}
/// <summary>
/// Initializes the MediaCapture, starts preview.
/// </summary>
public async Task InitializeCameraAsync()
{
MediaCapture = new MediaCapture();
MediaCapture.Failed += MediaCapture_Failed;
try
{
await MediaCapture.InitializeAsync();
_previewControl.Source = MediaCapture;
await MediaCapture.StartPreviewAsync();
IsPreviewing = true;
}
catch (UnauthorizedAccessException)
{
// This can happen if access to the camera has been revoked.
MainPage.Current.NotifyUser("The app was denied access to the camera", NotifyType.ErrorMessage);
await CleanupCameraAsync();
}
}
private async Task CaptureImage()
{
// Capture a new photo or video from the device.
cameraCapture = new MediaCapture();
cameraCapture.Failed += cameraCapture_Failed;
// Initialize the camera for capture.
await cameraCapture.InitializeAsync();
if (Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.Media.Capture.CameraOptionsUI"))
{
CameraOptionsUI.Show(cameraCapture);
}
captureGrid.Visibility = Windows.UI.Xaml.Visibility.Visible;
previewElement.Visibility = Windows.UI.Xaml.Visibility.Visible;
previewElement.Source = cameraCapture;
await cameraCapture.StartPreviewAsync();
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached.
/// This parameter is typically used to configure the page.</param>
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
// TODO: Prepare page for display here.
// TODO: If your application contains multiple pages, ensure that you are
// handling the hardware Back button by registering for the
// Windows.Phone.UI.Input.HardwareButtons.BackPressed event.
// If you are using the NavigationHelper provided by some templates,
// this event is handled for you.
// Create MediaCapture and init
mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync();
mediaCapture.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
// Assign to Xaml CaptureElement.Source and start preview
capturePreview.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
}
private async Task <MediaCapture> ConnectToCamera(int i, CaptureElement preview)
{
var manager = new Windows.Media.Capture.MediaCapture();
var allVideoDevices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
if (allVideoDevices.Count > i)
{
var cameraDevice = allVideoDevices[i];
await manager.InitializeAsync(new MediaCaptureInitializationSettings { VideoDeviceId = cameraDevice.Id, StreamingCaptureMode = StreamingCaptureMode.Video });
var cameraProperties = manager.VideoDeviceController.GetAvailableMediaStreamProperties(MediaStreamType.VideoPreview).Select(x => x as VideoEncodingProperties).ToList();
foreach (var mediaEncodingProperty in cameraProperties)
{
Debug.WriteLine(mediaEncodingProperty.Width + "x" + mediaEncodingProperty.Height + " FPS: " + mediaEncodingProperty.FrameRate.Numerator + "Type:" + mediaEncodingProperty.Type + " SubType:" + mediaEncodingProperty.Subtype);
}
foreach (var mediaEncodingProperty in cameraProperties)
{
if (//mediaEncodingProperty.Width == 960 &&
//mediaEncodingProperty.Height == 544 &&
mediaEncodingProperty.Width == 320 &&
mediaEncodingProperty.Height == 240 &&
mediaEncodingProperty.FrameRate.Numerator == 15 &&
string.Compare(mediaEncodingProperty.Subtype, "YUY2") == 0)
{
Debug.WriteLine("Chosen: " + mediaEncodingProperty.Width + "x" + mediaEncodingProperty.Height + " FPS: " + mediaEncodingProperty.FrameRate.Numerator + "Type:" + mediaEncodingProperty.Type + " SubType:" + mediaEncodingProperty.Subtype);
await manager.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.VideoPreview, mediaEncodingProperty);
break;
}
}
preview.Source = manager;
await manager.StartPreviewAsync();
}
return(manager);
}
private async void CaptureImage(object parameter)
{
try
{
MediaCaptureManager = new Windows.Media.Capture.MediaCapture();
await MediaCaptureManager.InitializeAsync();
MediaCaptureManager.Failed += MediaCaptureManager_Failed;
this._previewElement.Source = MediaCaptureManager;
await MediaCaptureManager.StartPreviewAsync();
this.PreviewEnabled = true;
this.Idle = true;
SetupVideoPreviewSettings();
}
catch (Exception ex)
{
ShowFatalErrorMessageDialog(ex.Message, string.Empty);
}
}
async public void initPhotoControl()
{
setMediaCaptureInitializationSettings();
// reset all properties if photoManager contains an object.
if (_captureManager != null)
{
_captureManager.Dispose();
_captureManager = null;
}
_captureManager = new MediaCapture();
await _captureManager.InitializeAsync(getMediaCaptureInitializationSettings());
cptElementShowPreview.Source = _captureManager;
await _captureManager.StartPreviewAsync();
DisplayInformation displayInfo = DisplayInformation.GetForCurrentView();
displayInfo.OrientationChanged += DisplayInfo_OrientationChanged;
DisplayInfo_OrientationChanged(displayInfo, null);
}
internal async void btnStartPreview_Click(Object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
m_bPreviewing = false;
try
{
ShowStatusMessage("Starting preview");
EnableButton(false, "StartPreview");
previewCanvas2.Visibility = Windows.UI.Xaml.Visibility.Visible;
previewElement2.Source = m_mediaCaptureMgr;
await m_mediaCaptureMgr.StartPreviewAsync();
m_bPreviewing = true;
ShowStatusMessage("Start preview successful");
}
catch (Exception exception)
{
m_bPreviewing = false;
previewElement2.Source = null;
EnableButton(true, "StartPreview");
ShowExceptionMessage(exception);
}
}
private async void v_Button_Capture_Click(object sender, RoutedEventArgs e)
{
isCapturing = !isCapturing;
if (isCapturing)
{
if (isFirst)
{
captureManager = new MediaCapture();
await captureManager.InitializeAsync();
capturePreview.Source = captureManager;
await captureManager.StartPreviewAsync();
isFirst = false;
}
v_Image.Source = null;
}
else
{
ImageEncodingProperties imageProperties = ImageEncodingProperties.CreateJpeg();
var stream = new InMemoryRandomAccessStream();
await captureManager.CapturePhotoToStreamAsync(imageProperties, stream);
_bitmap = new WriteableBitmap(300, 300);
stream.Seek(0);
await _bitmap.SetSourceAsync(stream);
//await captureManager.StopPreviewAsync();
v_Image.Source = _bitmap;
}
}
private async void btnStartPreview_Click(Object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
try
{
ShowStatusMessage("Starting preview");
btnStartPreview4.IsEnabled = false;
btnStartStopPhotoSequence.IsEnabled = true;
m_bPreviewing = true;
previewCanvas4.Visibility = Windows.UI.Xaml.Visibility.Visible;
previewElement4.Source = m_capture;
await m_capture.StartPreviewAsync();
ShowStatusMessage("Start preview successful");
}
catch (Exception ex)
{
previewElement4.Source = null;
btnStartPreview4.IsEnabled = true;
btnStartStopPhotoSequence.IsEnabled = false;
m_bPreviewing = false;
ShowExceptionMessage(ex);
}
}
private async Task InitializeQrCode()
{
// Find all available webcams
DeviceInformationCollection webcamList = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
// Get the proper webcam (default one)
DeviceInformation backWebcam = (from webcam in webcamList
where webcam.IsEnabled
select webcam).FirstOrDefault();
// Initializing MediaCapture
_mediaCapture = new MediaCapture();
await _mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings
{
VideoDeviceId = backWebcam.Id,
AudioDeviceId = "",
StreamingCaptureMode = StreamingCaptureMode.Video,
PhotoCaptureSource = PhotoCaptureSource.VideoPreview
});
// Set the source of CaptureElement to MediaCapture
captureElement.Source = _mediaCapture;
await _mediaCapture.StartPreviewAsync();
}
public async Task StartScanningAsync(Action<ZXing.Result> scanCallback, MobileBarcodeScanningOptions options = null)
{
if (stopping)
return;
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 this.GetFilteredCameraOrDefaultAsync(ScanningOptions);
mediaCapture = new MediaCapture();
// Initialize the capture with the settings above
await mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings()
{
StreamingCaptureMode = StreamingCaptureMode.Video,
VideoDeviceId = preferredCamera.Id
});
// Set the capture element's source to show it in the UI
captureElement.Source = mediaCapture;
// Start the preview
await mediaCapture.StartPreviewAsync();
// 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 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();
System.Diagnostics.Debug.WriteLine("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);
// Set the selected resolution
await mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.VideoPreview, chosenProp);
await SetPreviewRotationAsync();
captureElement.Stretch = Stretch.UniformToFill;
// Get our preview properties
var previewProperties = mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview) as VideoEncodingProperties;
// Setup a frame to use as the input settings
var destFrame = new VideoFrame(Windows.Graphics.Imaging.BitmapPixelFormat.Bgra8, (int)previewProperties.Width, (int)previewProperties.Height);
var zxing = ScanningOptions.BuildBarcodeReader();
timerPreview = new Timer(async (state) => {
if (stopping)
return;
if (mediaCapture == null || mediaCapture.CameraStreamState != Windows.Media.Devices.CameraStreamState.Streaming)
return;
if (processing)
return;
if (!isAnalyzing)
return;
processing = true;
SoftwareBitmapLuminanceSource luminanceSource = null;
try
{
// Get preview
var frame = await mediaCapture.GetPreviewFrameAsync(destFrame);
// Create our luminance source
luminanceSource = new SoftwareBitmapLuminanceSource(frame.SoftwareBitmap);
} catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("GetPreviewFrame Failed: {0}", ex);
}
ZXing.Result result = null;
try
{
// Try decoding the image
if (luminanceSource != null)
result = zxing.Decode(luminanceSource);
}
catch (Exception ex)
{
}
// Check if a result was found
if (result != null && !string.IsNullOrEmpty (result.Text))
{
if (!ContinuousScanning)
await StopScanningAsync();
LastScanResult = result;
ScanCallback(result);
}
processing = false;
}, null, TimeSpan.FromMilliseconds(200), TimeSpan.FromMilliseconds(200));
}
private async Task CreateMediaCapture()
{
mediaCapture = new MediaCapture();
mediaCapture.Failed += mediaCapture_Failed;
var settings = new MediaCaptureInitializationSettings()
{
StreamingCaptureMode = StreamingCaptureMode.Video
};
try
{
await mediaCapture.InitializeAsync(settings);
}
catch (Exception)
{
this.progressText.Text = "No camera is available.";
return;
}
captureElement.Source = mediaCapture;
await mediaCapture.StartPreviewAsync();
}
//private void orientView()
//{
// var bounds = ApplicationView.GetForCurrentView().VisibleBounds;
// grid.Height = bounds.Height;
// grid.Width = bounds.Width;
// var displayInfo = Windows.Graphics.Display.DisplayInformation.GetForCurrentView();
// switch (displayInfo.CurrentOrientation)
// {
// case Windows.Graphics.Display.DisplayOrientations.Landscape:
// mediaCapture.SetPreviewRotation(VideoRotation.None);
// break;
// case Windows.Graphics.Display.DisplayOrientations.LandscapeFlipped:
// mediaCapture.SetPreviewRotation(VideoRotation.Clockwise180Degrees);
// break;
// case Windows.Graphics.Display.DisplayOrientations.Portrait:
// mediaCapture.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
// break;
// case Windows.Graphics.Display.DisplayOrientations.PortraitFlipped:
// mediaCapture.SetPreviewRotation(VideoRotation.Clockwise270Degrees);
// break;
// }
//}
async private void InitCamera()
{
if (App.APP_SETTINGS.Cameras.Count > 0)
{
try
{
mediaCapture = new MediaCapture();
await mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings { VideoDeviceId = App.APP_SETTINGS.Cameras[App.APP_SETTINGS.SelectedCamera].ID, PhotoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.VideoPreview, StreamingCaptureMode = StreamingCaptureMode.Video });
SetResolution();
capturePreview.Source = mediaCapture;
//orientView();
if(App.IsMobile)
mediaCapture.SetPreviewRotation(VideoRotation.Clockwise90Degrees);
await mediaCapture.StartPreviewAsync();
if (mediaCapture.VideoDeviceController.FocusControl.Supported)
{
await mediaCapture.VideoDeviceController.FocusControl.SetPresetAsync(Windows.Media.Devices.FocusPreset.AutoNormal);
}
else
{
FocusText.Visibility = Visibility.Collapsed;
}
if(!mediaCapture.VideoDeviceController.TorchControl.Supported)
{
btnTorch.Visibility = Visibility.Collapsed;
}
beginCapture();
}
catch (Exception ex)
{
}
}
else
{
NoCamera.Visibility = Visibility.Visible;
}
}
async private void StartCapturePreview_Click(object sender, RoutedEventArgs e)
{
capturePreview.Source = captureManager;
await captureManager.StartPreviewAsync();
}
internal async void button1_Click(object sender, RoutedEventArgs e)
{
/* Way one to use camera -> Full screen mode*/
/* CameraCapture(); */
/* Way two CaptureElement and canvas */
try
{
button1.IsEnabled = false;
//ShowStatusMessage("Starting device");
m_mediaCaptureMgr = new Windows.Media.Capture.MediaCapture();
await m_mediaCaptureMgr.InitializeAsync();
if (m_mediaCaptureMgr.MediaCaptureSettings.VideoDeviceId != "" && m_mediaCaptureMgr.MediaCaptureSettings.AudioDeviceId != "")
{
canpreview = true;
canrecord = true;
cantakephoto = true;
//ShowStatusMessage("Device initialized successful");
m_mediaCaptureMgr.RecordLimitationExceeded += new Windows.Media.Capture.RecordLimitationExceededEventHandler(RecordLimitationExceeded);
m_mediaCaptureMgr.Failed += new Windows.Media.Capture.MediaCaptureFailedEventHandler(Failed);
}
else
{
button1.IsEnabled = true;
//ShowStatusMessage("No VideoDevice/AudioDevice Found");
}
}
catch (Exception exception)
{
//ShowExceptionMessage(exception);
}
/* So far the code was for starting the device*/
/* Now the code to preview the image */
m_bPreviewing = false;
try
{
//ShowStatusMessage("Starting preview");
button1.IsEnabled = false;
canpreview = false;
previewCanvas1.Visibility = Windows.UI.Xaml.Visibility.Visible;
previewElement1.Source = m_mediaCaptureMgr;
await m_mediaCaptureMgr.StartPreviewAsync();
if ((m_mediaCaptureMgr.VideoDeviceController.Brightness != null) && m_mediaCaptureMgr.VideoDeviceController.Brightness.Capabilities.Supported)
{
SetupVideoDeviceControl(m_mediaCaptureMgr.VideoDeviceController.Brightness, sldBrightness);
}
if ((m_mediaCaptureMgr.VideoDeviceController.Contrast != null) && m_mediaCaptureMgr.VideoDeviceController.Contrast.Capabilities.Supported)
{
SetupVideoDeviceControl(m_mediaCaptureMgr.VideoDeviceController.Contrast, sldContrast);
}
rect1.Visibility = Visibility.Visible;
m_bPreviewing = true;
//ShowStatusMessage("Start preview successful");
captureclr.IsEnabled = true;
}
catch (Exception exception)
{
m_bPreviewing = false;
previewElement1.Source = null;
/* If attempt to get preview fails he can try again */
button1.IsEnabled = true;
canpreview = true;
//ShowExceptionMessage(exception);
}
}
