private async void InitializeMediaCapture()
{
_capturedSequence = new List <IRandomAccessStream>();
_mediaCapture = new MediaCapture();
var devices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
var backCamera = devices.FirstOrDefault(x => x.EnclosureLocation != null && x.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Back);
await _mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings
{
StreamingCaptureMode = StreamingCaptureMode.Video,
PhotoCaptureSource = PhotoCaptureSource.Auto,
AudioDeviceId = string.Empty,
VideoDeviceId = backCamera.Id
});
captureElement.Source = _mediaCapture;
await _mediaCapture.StartPreviewAsync();
var format = ImageEncodingProperties.CreateJpeg();
format.Width = 640;
format.Height = 480;
_lowLagPhotoSequenceCapture = await _mediaCapture.PrepareLowLagPhotoSequenceCaptureAsync(format);
_lowLagPhotoSequenceCapture.PhotoCaptured += OnPhotoCaptured;
}
private async void btnStartStopPhotoSequence_Click(Object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
try
{
if (btnStartStopPhotoSequence.Content.ToString() == "Prepare PhotoSequence")
{
if (!m_capture.VideoDeviceController.LowLagPhotoSequence.Supported)
{
rootPage.NotifyUser("Photo-sequence is not supported", NotifyType.ErrorMessage);
}
else
{
if (m_capture.VideoDeviceController.LowLagPhotoSequence.MaxPastPhotos < m_pastFrame)
{
m_pastFrame = m_capture.VideoDeviceController.LowLagPhotoSequence.MaxPastPhotos;
rootPage.NotifyUser("pastFrame number is past limit, reset passFrame number", NotifyType.ErrorMessage);
}
btnStartStopPhotoSequence.IsEnabled = false;
m_capture.VideoDeviceController.LowLagPhotoSequence.ThumbnailEnabled = true;
m_capture.VideoDeviceController.LowLagPhotoSequence.DesiredThumbnailSize = 300;
m_capture.VideoDeviceController.LowLagPhotoSequence.PhotosPerSecondLimit = 4;
m_capture.VideoDeviceController.LowLagPhotoSequence.PastPhotoLimit = m_pastFrame;
LowLagPhotoSequenceCapture photoCapture = await m_capture.PrepareLowLagPhotoSequenceCaptureAsync(ImageEncodingProperties.CreateJpeg());
photoCapture.PhotoCaptured += new Windows.Foundation.TypedEventHandler <LowLagPhotoSequenceCapture, PhotoCapturedEventArgs>(this.photoCapturedEventHandler);
m_photoSequenceCapture = photoCapture;
btnStartStopPhotoSequence.Content = "Take PhotoSequence";
btnStartStopPhotoSequence.IsEnabled = true;
m_bPhotoSequence = true;
}
}
else if (btnStartStopPhotoSequence.Content.ToString() == "Take PhotoSequence")
{
btnSaveToFile.IsEnabled = false;
m_frameNum = 0;
m_ThumbnailNum = 0;
m_selectedIndex = -1;
m_highLighted = false;
Clear();
btnStartStopPhotoSequence.IsEnabled = false;
await m_photoSequenceCapture.StartAsync();
}
else
{
rootPage.NotifyUser("Bad photo-sequence state", NotifyType.ErrorMessage);
}
}
catch (Exception exception)
{
ShowExceptionMessage(exception);
}
}
private void CaptureHandler2(
LowLagPhotoSequenceCapture senders, PhotoCapturedEventArgs args)
{
CapturedFrame frame = args.Frame;
// var is IAsyncOperation<TResult>
var result = frame.FlushAsync();
}
async private void CaptureHandler1(
LowLagPhotoSequenceCapture senders, PhotoCapturedEventArgs args)
{
CapturedFrame frame = args.Frame;
// var is bool
var result = await frame.FlushAsync();
}
private async void photoCapturedEventHandler(LowLagPhotoSequenceCapture senders, PhotoCapturedEventArgs args)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
try
{
if (m_frameNum == (m_pastFrame + m_futureFrame))
{
btnStartStopPhotoSequence.IsEnabled = false;
await m_photoSequenceCapture.StopAsync();
btnStartStopPhotoSequence.IsEnabled = true;
btnSaveToFile.IsEnabled = true;
ThumbnailGrid.SelectedIndex = m_selectedIndex;
}
else if (m_frameNum < (m_pastFrame + m_futureFrame))
{
var bitmap = new BitmapImage();
m_framePtr[m_frameNum] = args.Frame;
bitmap.SetSource(args.Thumbnail);
var image = new Image();
image.Source = bitmap;
image.Width = 160;
image.Height = 120;
var ThumbnailItem = new Windows.UI.Xaml.Controls.GridViewItem();
ThumbnailItem.Content = image;
ThumbnailGrid.Items.Add(ThumbnailItem);
if ((!m_highLighted) && (args.CaptureTimeOffset.Ticks > 0))
{
//first picture with timeSpam > 0 get highlighted
m_highLighted = true;
ThumbnailItem.BorderThickness = new Thickness(1);
ThumbnailItem.BorderBrush = new Windows.UI.Xaml.Media.SolidColorBrush(Windows.UI.Colors.Red);
m_selectedIndex = (int)m_ThumbnailNum;
}
m_ThumbnailNum++;
}
m_frameNum++;
}
catch (Exception ex)
{
ShowExceptionMessage(ex);
}
});
}
public void OnPhotoCaptured(LowLagPhotoSequenceCapture s, PhotoCapturedEventArgs e)
{
if (_fileIndex < AMOUNT_OF_FRAMES_IN_SEQUENCE)
{
if (_saveTask == null)
{
_saveTask = Save(e.Frame, _fileIndex++);
}
else
{
_saveTask = _saveTask.ContinueWith(t => Save(e.Frame, _fileIndex++));
}
}
else
{
StopSequenceCapture();
}
}
private async void photoCapturedEventHandler(LowLagPhotoSequenceCapture senders, PhotoCapturedEventArgs args)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async () =>
{
try
{
if (m_frameNum == (m_pastFrame + m_futureFrame))
{
btnStartStopPhotoSequence.IsEnabled = false;
await m_photoSequenceCapture.StopAsync();
btnStartStopPhotoSequence.IsEnabled = true;
btnSaveToFile.IsEnabled = true;
ThumbnailGrid.SelectedIndex = m_selectedIndex;
}
else if (m_frameNum < (m_pastFrame + m_futureFrame))
{
var bitmap = new BitmapImage();
m_framePtr[m_frameNum] = args.Frame;
bitmap.SetSource(args.Thumbnail);
var image = new Image();
image.Source = bitmap;
image.Width = 160;
image.Height = 120;
var ThumbnailItem = new Windows.UI.Xaml.Controls.GridViewItem();
ThumbnailItem.Content = image;
ThumbnailGrid.Items.Add(ThumbnailItem);
if ((!m_highLighted) && (args.CaptureTimeOffset.Ticks > 0))
{
//first picture with timeSpam > 0 get highlighted
m_highLighted = true;
ThumbnailItem.BorderThickness = new Thickness(1);
ThumbnailItem.BorderBrush = new Windows.UI.Xaml.Media.SolidColorBrush(Windows.UI.Colors.Red);
m_selectedIndex = (int)m_ThumbnailNum;
}
m_ThumbnailNum++;
}
m_frameNum++;
}
catch (Exception ex)
{
ShowExceptionMessage(ex);
}
});
}
private async void InitializeMediaCapture()
{
_capturedSequence = new List<IRandomAccessStream>();
_mediaCapture = new MediaCapture();
var devices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
var backCamera = devices.FirstOrDefault(x => x.EnclosureLocation != null && x.EnclosureLocation.Panel == Windows.Devices.Enumeration.Panel.Back);
await _mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings
{
StreamingCaptureMode = StreamingCaptureMode.Video,
PhotoCaptureSource = PhotoCaptureSource.Auto,
AudioDeviceId = string.Empty,
VideoDeviceId = backCamera.Id
});
captureElement.Source = _mediaCapture;
await _mediaCapture.StartPreviewAsync();
var format = ImageEncodingProperties.CreateJpeg();
format.Width = 640;
format.Height = 480;
_lowLagPhotoSequenceCapture = await _mediaCapture.PrepareLowLagPhotoSequenceCaptureAsync(format);
_lowLagPhotoSequenceCapture.PhotoCaptured += OnPhotoCaptured;
}
public void OnPhotoCaptured(LowLagPhotoSequenceCapture s, PhotoCapturedEventArgs e)
{
if (_fileIndex < AMOUNT_OF_FRAMES_IN_SEQUENCE)
{
if (_saveTask == null)
{
_saveTask = Save(e.Frame, _fileIndex++);
}
else
{
_saveTask = _saveTask.ContinueWith(t => Save(e.Frame, _fileIndex++));
}
}
else
{
StopSequenceCapture();
}
}
public LowLagPhotoSequenceCaptureEvents(LowLagPhotoSequenceCapture This)
{
this.This = This;
}
