public void NullSource ()
{
VideoBrush vb = new VideoBrush ();
Assert.Throws<NullReferenceException> (delegate {
vb.SetSource ((MediaElement) null);
}, "MediaElement");
Assert.Throws<NullReferenceException> (delegate {
vb.SetSource ((CaptureSource) null);
}, "CaptureSource");
}
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
base.OnNavigatedTo(e);
// Delayed due to Camera init bug in WP71 SDK Beta 2
// See http://forums.create.msdn.com/forums/p/85830/516843.aspx
Dispatcher.BeginInvoke(() =>
{
// Initialize the webcam
photoCamera = new PhotoCamera();
photoCamera.Initialized += PhotoCameraInitialized;
CameraButtons.ShutterKeyHalfPressed += PhotoCameraButtonHalfPress;
isInitialized = false;
isDetecting = false;
// Fill the Viewport Rectangle with the VideoBrush
var vidBrush = new VideoBrush();
vidBrush.SetSource(photoCamera);
Viewport.Fill = vidBrush;
// Start timer
dispatcherTimer = new DispatcherTimer {Interval = TimeSpan.FromMilliseconds(50)};
dispatcherTimer.Tick += (sender, e1) => Detect();
dispatcherTimer.Start();
});
}
void Load()
{
if (CaptureDeviceConfiguration.AllowedDeviceAccess ||
CaptureDeviceConfiguration.RequestDeviceAccess())
{
var devices = CaptureDeviceConfiguration.GetAvailableVideoCaptureDevices();
foreach (var device in devices)
{
var videoItem = new VideoItem();
videoItem.Name = device.FriendlyName;
var source = new CaptureSource();
source.VideoCaptureDevice = device;
var videoBrush = new VideoBrush();
videoBrush.SetSource(source);
videoItem.Brush = videoBrush;
this.sources.Add(source);
this.sourceItems.Add(videoItem);
}
this.videoItems.ItemsSource = this.sourceItems;
this.StartAll();
}
}
public void StartWebCam()
{
_captureSource = new CaptureSource();
_captureSource.CaptureImageCompleted += new EventHandler<CaptureImageCompletedEventArgs>(_captureSource_CaptureImageCompleted);
_captureSource.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
try
{
// Start capturing
if (_captureSource.State != CaptureState.Started)
{
// Create video brush and fill the WebcamVideo rectangle with it
var vidBrush = new VideoBrush();
vidBrush.Stretch = Stretch.Uniform;
vidBrush.SetSource(_captureSource);
WebcamVideo.Fill = vidBrush;
// Ask user for permission and start the capturing
if (CaptureDeviceConfiguration.RequestDeviceAccess())
{
_captureSource.Start();
}
}
}
catch (InvalidOperationException)
{
InfoTextBox.Text = "Web Cam already started - if not, I can't find it...";
}
catch (Exception)
{
InfoTextBox.Text = "Could not start web cam, do you have one?";
}
}
void MainPage_Loaded(object sender, RoutedEventArgs e)
{
captureSource = new CaptureSource
{
VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice()
};
var videoBrush = new VideoBrush();
videoBrush.SetSource(captureSource);
Viewport.Fill = videoBrush;
markerDetector = new CaptureSourceMarkerDetector();
var marker = Marker.LoadFromResource("Bola.pat", 64, 64, 80);
markerDetector.Initialize(captureSource, 1d, 4000d, marker);
markerDetector.MarkersDetected += (obj, args) =>
{
Dispatcher.BeginInvoke(() =>
{
var results = args.DetectionResults;
if (results.HasResults)
{
var centerAtOrigin =
Matrix3DFactory.
CreateTranslation(
-Imagem.ActualWidth*
0.5,
-Imagem.
ActualHeight*
0.5, 0);
var scale =
Matrix3DFactory.CreateScale
(0.5, -0.5, 0.5);
var world = centerAtOrigin*
scale*
results[0].
Transformation;
var vp =
Matrix3DFactory.
CreateViewportTransformation
(Viewport.ActualWidth,
Viewport.ActualHeight);
var m =
Matrix3DFactory.
CreateViewportProjection
(world,
Matrix3D.Identity,
markerDetector.
Projection, vp);
Imagem.Projection =
new Matrix3DProjection
{ProjectionMatrix = m};
}
});
};
}
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
// Initialize the webcam
captureSource = new CaptureSource();
captureSource.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
// Fill the Viewport Rectangle with the VideoBrush
var vidBrush = new VideoBrush();
vidBrush.SetSource(captureSource);
Viewport.Fill = vidBrush;
}
// Constructor
public MainPage()
{
InitializeComponent();
c = new CaptureSource();
c.VideoCaptureDevice = CaptureDeviceConfiguration.GetAvailableVideoCaptureDevices().First();
var vidBrush = new VideoBrush();
vidBrush.SetSource(c);
ViewPort.Fill = vidBrush;
}
public void LoadCamera(ICameraCaptureDevice camera)
{
if (VideoBrush == null && camera != null)
{
RunOnUIThread(() =>
{
VideoBrush = new VideoBrush();
VideoBrush.Stretch = Stretch.Uniform;
VideoBrush.SetSource(camera);
Rectangle.Fill = VideoBrush;
});
}
}
private void ConnectWebcamToDevice()
{
if (!CaptureDeviceConfiguration.AllowedDeviceAccess)
{
if(!CaptureDeviceConfiguration.RequestDeviceAccess())
return;
}
_cam.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
var brush = new VideoBrush {Stretch = Stretch.Uniform};
brush.SetSource(_cam);
CamDisplay.Fill = brush;
}
/// <summary>
/// 获得VideoBrush对象
/// </summary>
/// <returns></returns>
public VideoBrush GetVideoBrush()
{
VideoBrush vBrush = new VideoBrush();
if (_vcDevice != null)
{
_cSource.VideoCaptureDevice = _vcDevice;
vBrush.SetSource(_cSource);//注意，不能在这里直接开启摄像头，必须等到所有设置准备就绪
}
else
{
Console.WriteLine("尚未找到捕捉设备！请确保设备正确安装！");
}
return vBrush;
}
public void InitializeVideoRecorder()
{
try
{
//fileName = string.Format(@"\Purposecode\Video{0}.mp4", DateTime.Now.ToString("yyyyMMddHHmmss"));
fileName = string.Format("Video{0}.mp4", DateTime.Now.ToString("yyyyMMddHHmmss"));
if (captureSource == null)
{
// Create the VideoRecorder objects.
captureSource = new CaptureSource();
fileSink = new FileSink();
videoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
// Add eventhandlers for captureSource.
captureSource.CaptureFailed += new EventHandler<ExceptionRoutedEventArgs>(OnCaptureFailed);
// Initialize the camera if it exists on the device.
if (videoCaptureDevice != null)
{
// Create the VideoBrush for the viewfinder.
videoRecorderBrush = new VideoBrush();
videoRecorderBrush.SetSource(captureSource);
// Display the viewfinder image on the rectangle.
viewfinderRectangle.Fill = videoRecorderBrush;
StopPlaybackRecording.IsEnabled = false;
// Start video capture and display it on the viewfinder.
captureSource.Start();
// Set the button state and the message.
UpdateUI(ButtonState.Initialized, "Tap record to start recording...");
}
else
{
// Disable buttons when the camera is not supported by the device.
UpdateUI(ButtonState.CameraNotSupported, "Camera is not supported..");
}
}
}
catch (Exception ex)
{
var test = ex.Message;
}
} //InitializeVideoRecorder()
private void StartRecordig()
{
if (m_captureSource == null)
{
m_captureSource = new CaptureSource();
m_captureSource.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
m_captureSource.AudioCaptureDevice = CaptureDeviceConfiguration.GetDefaultAudioCaptureDevice();
m_sink = new FileSink();
m_sink.CaptureSource = m_captureSource;
m_sink.IsolatedStorageFileName = m_capturedFileName;
}
VideoBrush brush = new VideoBrush();
brush.SetSource(m_captureSource);
CameraPreview.Fill = brush;
m_captureSource.Start();
}
private void StartCapture_Click(object sender, RoutedEventArgs e)
{
_captureSource.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
_captureSource.AudioCaptureDevice = CaptureDeviceConfiguration.GetDefaultAudioCaptureDevice();
VideoBrush videoBrush = new VideoBrush();
videoBrush.Stretch = Stretch.Uniform;
videoBrush.SetSource(_captureSource);
_videoStream = new MemoryStream();
RiffAviFileWriter aviFileWriter = new RiffAviFileWriter(_videoStream);
_videoSink = new BufferQueueVideoSink(aviFileWriter)
{
CaptureSource = _captureSource
};
if (CaptureDeviceConfiguration.AllowedDeviceAccess || CaptureDeviceConfiguration.RequestDeviceAccess())
_captureSource.Start();
Video.Fill = videoBrush;
}
public void displayPreview(String camName, Rectangle videoPanel)
{
// create a new VideoBrush
videoBrush = null;
videoBrush = new VideoBrush();
videoBrush.Stretch = Stretch.Uniform;
// connect the new VideoBrush to the new device
foreach (Webcam wc in webcams)
{
if (wc.toString().Equals(camName))
{
videoBrush.SetSource(wc.getSrc()());
break;
}
}
// connect the VideoPanel to the new VideoBrush
videoPanel.Fill = videoBrush;
}
private void InitializeVideoRecorder()
{
if (_captureSource == null)
{
_captureSource = new CaptureSource();
_fileSink = new FileSink();
_videoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
_captureSource.CaptureFailed += OnCaptureSourceOnCaptureFailed;
_captureSource.CaptureImageCompleted += CaptureSourceOnCaptureImageCompleted;
if (_videoCaptureDevice != null)
{
_videoBrush = new VideoBrush();
_videoBrush.SetSource(_captureSource);
ViewFinderRectangle.Fill = _videoBrush;
_captureSource.Start();
}
}
}
/// <summary>
/// Initialize the Capture Device
/// </summary>
private void InitializeCaptureDevice()
{
//set the video capture device
if (captureSource == null)
{
captureSource = new CaptureSource();
captureSource.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
captureSource.AudioCaptureDevice = CaptureDeviceConfiguration.GetDefaultAudioCaptureDevice();
sink = new FileSink();
sink.CaptureSource = captureSource;
sink.IsolatedStorageFileName = m_capturedFileName;
}
//set the video preview
var brush = new VideoBrush();
brush.SetSource(captureSource);
cameraPreview.Fill = brush;
}
private void BtnCapture_Click(object sender, RoutedEventArgs e)
{
try
{ // 开始捕捉
if (captureSource.State != CaptureState.Started)
{
captureSource.Stop();
// 创建 video brush 并填充到 rectangle
VideoBrush vidBrush = new VideoBrush();
vidBrush.Stretch = Stretch.UniformToFill;
vidBrush.SetSource(captureSource);
focusRectangle.Viewport.Fill = vidBrush;
// 询问是否接入
if (CaptureDeviceConfiguration.AllowedDeviceAccess || CaptureDeviceConfiguration.RequestDeviceAccess())
{
focusRectangle.Viewport.MaxHeight = focusRectangle.Viewport.MaxWidth = ZoomInOut.Maximum = 400;
ZoomInOut.Value = 270;
ZoomInOut.Minimum = 16;
ZoomInOut.ValueChanged += new RoutedPropertyChangedEventHandler<double>(focusRectangle.ViewportSlider_ValueChanged);
captureSource.Start();
BtnCapture.Text = "打开摄像头";
BtnUploadImage.IsEnabled = BtnAdvanceMode.IsEnabled = true;
}
}
else
{
captureSource.Stop();
BtnCapture.Text = "关闭摄像头";
BtnUploadImage.IsEnabled = BtnAdvanceMode.IsEnabled = false;
}
}
catch (Exception ex)
{
Utils.ShowMessageBox("Error using webcam", ex.Message);
}
}
private void UserControlLoaded(object sender, RoutedEventArgs e)
{
// Initialize the webcam
captureSource = new CaptureSource {VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice()};
// Desired format is 640 x 480 (good tracking results and performance)
captureSource.VideoCaptureDevice.DesiredFormat = new VideoFormat(PixelFormatType.Unknown, 640, 480, 60);
captureSource.CaptureImageCompleted += CaptureSourceCaptureImageCompleted;
// Fill the Viewport Rectangle with the VideoBrush
var vidBrush = new VideoBrush();
vidBrush.SetSource(captureSource);
Viewport.Fill = vidBrush;
// Conctruct the Detector
arDetector = new BitmapMarkerDetector { Threshold = 200, JitteringThreshold = 1 };
// Load the marker patterns. It has 16x16 segments and a width of 80 millimeters
slarMarker = Marker.LoadFromResource("data/Marker_SLAR_16x16segments_80width.pat", 16, 16, 80);
// Capture or transform periodically
CompositionTarget.Rendering += (s, e2) =>
{
if (captureSource.State == CaptureState.Started)
{
captureSource.CaptureImageAsync();
}
else
{
Game.SetWorldMatrix(Balder.Math.Matrix.Identity);
}
if (Game.ParticleSystem.Particles != null && Game.ParticleSystem.Particles.Count > 0)
{
}
};
}
public void InitializeVideoRecorder()
{
if (_captureSource == null)
{
// Create the VideoRecorder objects.
_captureSource = new CaptureSource();
_fileSink = new FileSink();
_videoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
// Add eventhandlers for captureSource.
_captureSource.CaptureFailed += OnCaptureFailed;
// Initialize the camera if it exists on the phone.
if (_videoCaptureDevice != null)
{
// Create the VideoBrush for the viewfinder.
_videoRecorderBrush = new VideoBrush();
_videoRecorderBrush.SetSource(_captureSource);
// Display the viewfinder image on the rectangle.
viewfinderRectangle.Fill = _videoRecorderBrush;
// Start video capture and display it on the viewfinder.
_captureSource.Start();
// Set the button state and the message.
UpdateUI(ButtonState.Initialized, "Tap record to start recording...");
}
else
{
// Disable buttons when the camera is not supported by the phone.
UpdateUI(ButtonState.NoChange, "Camera Not Supported.");
}
}
}
private void btCapture_Click(object sender, RoutedEventArgs e)
{
if (CaptureDeviceConfiguration.AllowedDeviceAccess || CaptureDeviceConfiguration.RequestDeviceAccess())
{
VideoCaptureDevice webcam=cboWebcams.SelectedItem as VideoCaptureDevice;
if(webcam==null)
CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
if (webcam != null)
{
capture.Stop();
capture.VideoCaptureDevice = webcam;
capture.Start();
VideoBrush brush = new VideoBrush();
brush.SetSource(capture);
brush.Stretch = Stretch.Uniform;
captureRect.Fill = brush;
}
else MessageBox.Show("Nessuna webcam disponibile");
}
}
void InitializeCamera(CameraType cameraType)
{
// Camera resolution data gathering requires the camera to be initialized
var camera = new PhotoCamera(cameraType);
using (var mutex = new ManualResetEvent(false))
{
camera.Initialized += (sender, e) =>
{
try
{
CollectCameraCaps(sender, e);
}
finally
{
mutex.Set();
}
};
var dummyBrush = new VideoBrush();
dummyBrush.SetSource(camera); // Needed for the camera.Initialized event to fire.
mutex.WaitOne();
}
}
private async Task InitializePhotoCaptureDevice(CameraSensorLocation sensorLocation, Size size, Size previewSize)
{
PhotoCaptureDevice = await PhotoCaptureDevice.OpenAsync(sensorLocation, size);
await PhotoCaptureDevice.SetPreviewResolutionAsync(previewSize);
CompositeTransform = new CompositeTransform();
CompositeTransform.CenterX = .5;
CompositeTransform.CenterY = .5;
CompositeTransform.Rotation = PhotoCaptureDevice.SensorRotationInDegrees
- (Orientation == PageOrientation.LandscapeLeft ? 90 : 0)
+ (Orientation == PageOrientation.LandscapeRight ? 90 : 0);
if (sensorLocation == CameraSensorLocation.Front)
{
CompositeTransform.ScaleX = -1;
}
VideoBrush = new VideoBrush();
VideoBrush.RelativeTransform = CompositeTransform;
VideoBrush.Stretch = Stretch.Fill;
VideoBrush.SetSource(PhotoCaptureDevice);
}
/// <summary>
/// Initializes VideoRecorder
/// </summary>
public void InitializeVideoRecorder()
{
if (captureSource == null)
{
captureSource = new CaptureSource();
fileSink = new FileSink();
videoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
if (videoCaptureDevice != null)
{
videoRecorderBrush = new VideoBrush();
videoRecorderBrush.SetSource(captureSource);
viewfinderRectangle.Fill = videoRecorderBrush;
captureSource.Start();
this.UpdateUI(VideoState.Initialized);
}
else
{
this.UpdateUI(VideoState.CameraNotSupported);
}
}
}
public void Init(Ioctls ioctls, Core core, Runtime runtime)
{
mCamera = new PhotoCamera(CameraType.Primary);
mVideoBrush = new VideoBrush();
mVideoBrush.SetSource(mCamera);
mVideoBrush.Stretch = Stretch.Uniform;
runtime.RegisterCleaner(delegate()
{
mCamera.Dispose();
mCamera = null;
});
// this should be set according to the orientation of
// the device I guess.
mVideoBrush.RelativeTransform = new CompositeTransform()
{
CenterX = 0.5,
CenterY = 0.5,
Rotation = 90
};
ioctls.maCameraFormat = delegate(int _index, int _fmt)
{
System.Windows.Size dim;
if (GetCameraFormat(_index, out dim) == false)
return MoSync.Constants.MA_CAMERA_RES_FAILED;
core.GetDataMemory().WriteInt32(_fmt + MoSync.Struct.MA_CAMERA_FORMAT.width,
(int)dim.Width);
core.GetDataMemory().WriteInt32(_fmt + MoSync.Struct.MA_CAMERA_FORMAT.height,
(int)dim.Height);
return MoSync.Constants.MA_CAMERA_RES_OK;
};
ioctls.maCameraFormatNumber = delegate()
{
IEnumerable<System.Windows.Size> res = mCamera.AvailableResolutions;
if (res == null) return 0;
IEnumerator<System.Windows.Size> resolutions = res.GetEnumerator();
resolutions.MoveNext();
int number = 0;
while (resolutions.Current != null)
{
number++;
}
return number;
};
ioctls.maCameraStart = delegate()
{
return 0;
};
ioctls.maCameraStop = delegate()
{
return 0;
};
ioctls.maCameraSetPreview = delegate(int _widgetHandle)
{
// something like
// videoBrush = ((CameraViewFinder)runtime.GetModule<MoSyncNativeUIModule>.GetWidget(_widgetHandle)).GetBrush();
// videoBrush.SetSource(mCamera)
IWidget w = runtime.GetModule<NativeUIModule>().GetWidget(_widgetHandle);
if (w.GetType() != typeof(MoSync.NativeUI.CameraPreview))
{
return MoSync.Constants.MA_CAMERA_RES_FAILED;
}
NativeUI.CameraPreview prev = (NativeUI.CameraPreview)w;
System.Windows.Controls.Canvas canvas = prev.GetViewFinderCanvas();
MoSync.Util.RunActionOnMainThreadSync(() =>
{
canvas.Background = mVideoBrush;
});
return 0;
};
ioctls.maCameraSelect = delegate(int _cameraNumber)
{
CameraType cameraType = CameraType.Primary;
if(_cameraNumber == MoSync.Constants.MA_CAMERA_CONST_BACK_CAMERA)
{
cameraType = CameraType.Primary;
}
else if(_cameraNumber == MoSync.Constants.MA_CAMERA_CONST_FRONT_CAMERA)
{
cameraType = CameraType.FrontFacing;
}
if(mCamera==null || mCamera.CameraType != cameraType)
{
mCamera = new PhotoCamera(cameraType);
if(mVideoBrush == null)
mVideoBrush = new VideoBrush();
mVideoBrush.SetSource(mCamera);
}
return 0;
};
ioctls.maCameraNumber = delegate()
{
// front facing and back facing is the standard I believe.
return 2;
};
ioctls.maCameraSnapshot = delegate(int _formatIndex, int _placeHolder)
{
AutoResetEvent are = new AutoResetEvent(false);
System.Windows.Size dim;
if (GetCameraFormat(_formatIndex, out dim) == false)
return MoSync.Constants.MA_CAMERA_RES_FAILED;
mCamera.Resolution = dim;
if (mCameraSnapshotDelegate != null)
mCamera.CaptureImageAvailable -= mCameraSnapshotDelegate;
mCameraSnapshotDelegate = delegate(object o, ContentReadyEventArgs args)
{
MoSync.Util.RunActionOnMainThreadSync(() =>
{
Resource res = runtime.GetResource(MoSync.Constants.RT_PLACEHOLDER, _placeHolder);
Stream data = args.ImageStream;
Memory dataMem = new Memory((int)data.Length);
dataMem.WriteFromStream(0, data, (int)data.Length);
res.SetInternalObject(dataMem);
});
are.Set();
};
mCamera.CaptureImageAvailable += mCameraSnapshotDelegate;
mCamera.CaptureImage();
are.WaitOne();
return 0;
};
ioctls.maCameraSetProperty = delegate(int _property, int _value)
{
return 0;
};
ioctls.maCameraSelect = delegate(int _camera)
{
return 0;
};
ioctls.maCameraGetProperty = delegate(int _property, int _value, int _bufSize)
{
String property = core.GetDataMemory().ReadStringAtAddress(_property);
if (property.Equals(MoSync.Constants.MA_CAMERA_MAX_ZOOM))
{
core.GetDataMemory().WriteStringAtAddress(
_value,
"0",
_bufSize);
}
return 0;
};
ioctls.maCameraRecord = delegate(int _stopStartFlag)
{
return 0;
};
}
async void ActivateCamera()
{
if (_dev == null)
{
if (AudioVideoCaptureDevice.AvailableSensorLocations.Contains(CameraSensorLocation.Back))
{
_dev = await AudioVideoCaptureDevice.OpenAsync(CameraSensorLocation.Back, AudioVideoCaptureDevice.GetAvailableCaptureResolutions(CameraSensorLocation.Back).First());
_videoBrush = new VideoBrush();
_videoBrush.SetSource(_dev);
MainPage_OrientationChanged(null, null);
this.videoRect.Fill = _videoBrush;
StorageFolder localFolder = ApplicationData.Current.LocalFolder;
StorageFile storageFile = await localFolder.CreateFileAsync("CameraMovie.mp4", CreationCollisionOption.ReplaceExisting);
_path = storageFile.Path;
_sst = await storageFile.OpenAsync(FileAccessMode.ReadWrite);
await _dev.StartRecordingToStreamAsync(_sst);
}
}
}
/// <summary>
/// Creates a <see cref="VideoBrush" /> containing the current image.
/// </summary>
/// <returns>A <see cref="VideoBrush" /> containing the current image.</returns>
public VideoBrush CreateVideoBrush()
{
var videoBrush = new VideoBrush();
videoBrush.SetSource(_photoCamera);
return videoBrush;
}
void InitializeCamera()
{
camera = new PhotoCamera(CameraType.Primary);
camera.Initialized += camera_Initialized;
camera.CaptureImageAvailable += camera_CaptureImageAvailable;
camera.CaptureCompleted += camera_CaptureCompleted;
CameraButtons.ShutterKeyPressed += cameraButtons_ShutterKeyPressed;
// create and rotate the brush since our orientation does not match the cameras default orientation.
var brush = new VideoBrush();
brush.SetSource(camera);
brush.RelativeTransform = new RotateTransform { CenterX = 0.5, CenterY = 0.5, Angle = camera.Orientation };
photoContainer.Fill = brush;
}
/// <summary>
/// Initializes video preview and updates the <see cref="PreviewBrush"/> accordingly.
/// </summary>
/// <param name="previewFormatSelector">
/// Function that chooses the most suitable preview format from the provided collection.
/// </param>
/// <returns>Awaitable task.</returns>
/// <exception cref="ArgumentNullException"><paramref name="previewFormatSelector"/> is <see langword="null"/>.</exception>
/// <exception cref="InvalidOperationException">No suitable video preview formats found.</exception>
public async Task StartPreviewAsync(Func<IEnumerable<VideoEncodingProperties>, VideoEncodingProperties> previewFormatSelector)
{
if (previewFormatSelector == null)
{
throw new ArgumentNullException("previewFormatSelector");
}
Tracing.Trace("CameraController: Starting video preview.");
if (!string.IsNullOrEmpty(this.PreviewVideoPort))
{
Tracing.Trace("CameraController: Video preview is already started.");
return;
}
try
{
// Set the video preview format.
VideoEncodingProperties previewFormat = await this.DoSetMediaFormatAsync(MediaStreamType.VideoPreview, previewFormatSelector);
MediaCapturePreviewSink previewSink = new MediaCapturePreviewSink();
VideoBrush videoBrush = new VideoBrush();
videoBrush.SetSource(previewSink);
MediaEncodingProfile profile = new MediaEncodingProfile { Audio = null, Video = previewFormat };
await this.MediaCapture.StartPreviewToCustomSinkAsync(profile, previewSink);
this.PreviewFormat = previewFormat;
this.PreviewResolution = new Size(previewFormat.Width, previewFormat.Height);
this.PreviewBrush = videoBrush;
this.PreviewVideoPort = previewSink.ConnectionPort;
////
//// Update camera properties.
////
this.Rotation = this.MediaCapture.GetPreviewRotation();
this.FocusSupported = this.MediaCapture.VideoDeviceController.FocusControl.Supported;
this.FocusAtPointSupported = this.MediaCapture.VideoDeviceController.RegionsOfInterestControl.AutoFocusSupported && this.MediaCapture.VideoDeviceController.RegionsOfInterestControl.MaxRegions > 0;
this.ContinuousAutoFocusSupported = this.MediaCapture.VideoDeviceController.FocusControl.SupportedFocusModes.Contains(FocusMode.Continuous);
this.FlashSupported = this.MediaCapture.VideoDeviceController.FlashControl.Supported;
if (this.FocusSupported)
{
this.ConfigureAutoFocus(continuous: false);
if (this.MediaCapture.VideoDeviceController.FocusControl.FocusChangedSupported)
{
this.MediaCapture.FocusChanged += this.MediaCaptureFocusChanged;
}
}
this.NotifyPropertiesChanged();
}
catch (Exception e)
{
Tracing.Trace("CameraController: StartPreviewAsync: 0x{0:X8}\r\n{1}", e.HResult, e);
throw;
}
Tracing.Trace("CameraController: Video preview started.");
}
private void InitializeCamera()
{
if (_capture == null)
{
_capture = new CaptureSource();
_capture.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
_capture.AudioCaptureDevice = null;
_capture.CaptureImageCompleted += new EventHandler<CaptureImageCompletedEventArgs>(_capture_CaptureImageCompleted);
}
if (_capture != null)
{
_capture.Stop();
_capture.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
_capture.AudioCaptureDevice = null;
VideoBrush videoBrush = new VideoBrush();
videoBrush.Stretch = Stretch.Fill;
videoBrush.SetSource(_capture);
rectVideo.Fill = videoBrush;
if ((CaptureDeviceConfiguration.AllowedDeviceAccess || CaptureDeviceConfiguration.RequestDeviceAccess()))
{
_capture.Start();
}
}
}
//Code for camera initialization event, and setting the source for the viewfinder
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
MI_Width = (int)MainImage.Width;
MI_Height = (int)MainImage.Height;
MI_Left = (int)MainImage.Margin.Left;
MI_Top = (int)MainImage.Margin.Top;
MI_Right = (int)MainImage.Margin.Right;
MI_Bottom = (int)MainImage.Margin.Bottom;
MI_Buffer = new byte[MI_Height * MI_Width]; // 180 * 242 = 43560
digFinder = new DigitFinder();
digRecognizer = new DigitRecognizer9();
InitState();
if (ShowDebugData.IsChecked == true)
IfShowDebugDataChecked();
else
IfShowDebugDataUnchecked();
//base.OnNavigatedTo(e);
// Check to see if the camera is available on the device.
if ((PhotoCamera.IsCameraTypeSupported(CameraType.Primary) == true) ||
(PhotoCamera.IsCameraTypeSupported(CameraType.FrontFacing) == true))
{
// Initialize the default camera.
cam = new PhotoCamera();
//Event is fired when the PhotoCamera object has been initialized
cam.Initialized += new EventHandler<Microsoft.Devices.CameraOperationCompletedEventArgs>(cam_Initialized);
//Set the VideoBrush source to the camera
viewfinderBrush = new VideoBrush();
viewfinderRectangle.Fill = viewfinderBrush;
viewfinderBrush.SetSource(cam);
Dispatcher.BeginInvoke(() =>
{
// Start timer
dispatcherTimer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(500) };
dispatcherTimer.Tick += (sender, e1) => Recognize();
dispatcherTimer.Start();
}
);
}
else
{
// The camera is not supported on the device.
this.Dispatcher.BeginInvoke(delegate()
{
// Write message.
txtDebug.Text = "A Camera is not available on this device.";
});
}
}
