async void ButtonPlayKiosk_Click(object sender, RoutedEventArgs e)
{
// -- Auto snap feature --
if (this.mediaCapture == null || !this.isPreviewActive)
{
return;
}
// get media stream properties from the capture device
VideoEncodingProperties previewProperties = this.mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview) as VideoEncodingProperties;
for (int i = 0; i < maxFrameCount; ++i)
{
// create a single preview frame using the specified format
VideoFrame videoFrameType = new VideoFrame(BitmapPixelFormat.Bgra8, (int)previewProperties.Width, (int)previewProperties.Height);
VideoFrame previewFrame = await this.mediaCapture.GetPreviewFrameAsync(videoFrameType);
SoftwareBitmap previewBitmap = previewFrame.SoftwareBitmap;
previewFrame.Dispose();
previewFrame = null;
if (previewBitmap != null)
{
int currImageIndex = (this.lastImageIndex + 1) % this.maxFrameCount;
// check if previously captured frame should be released
SoftwareBitmap existingBitmap = this.bitmapFrames[currImageIndex];
if (existingBitmap != null)
{
existingBitmap.Dispose();
}
// set the current captured bitmap frame
this.bitmapFrames[currImageIndex] = previewBitmap;
// create image source, needed to assign to xaml Image element
SoftwareBitmapSource imageSource = new SoftwareBitmapSource();
await imageSource.SetBitmapAsync(previewBitmap);
// check if current xaml Image has previous image source associated
Image currImage = (Image)this.stackPanelImages.Children[currImageIndex];
if (currImage.Source != null)
{
SoftwareBitmapSource releaseImageSource = (SoftwareBitmapSource)currImage.Source;
releaseImageSource.Dispose();
currImage.Source = null;
}
// set current Image element bitmap source
currImage.Source = imageSource;
// update the last set image index
this.lastImageIndex = currImageIndex;
}
await WaitMethod(this.frameDuration);
}
}
void CleanImageSource()
{
if (_sbs != null)
{
image.Source = null;
_sbs.Dispose();
_softwareBitmap.Dispose();
_sbs = null;
}
}
