/// <summary>
/// Gets the current preview frame as a SoftwareBitmap, displays its properties in a TextBlock, and can optionally display the image
/// in the UI and/or save it to disk as a jpg
/// </summary>
/// <returns></returns>
private async Task GetPreviewFrameAsSoftwareBitmapAsync()
{
// Get information about the preview
var previewProperties = _mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview) as VideoEncodingProperties;
// Create the video frame to request a SoftwareBitmap preview frame
var videoFrame = new VideoFrame(BitmapPixelFormat.Bgra8, (int)previewProperties.Width, (int)previewProperties.Height);
// Capture the preview frame
using (var currentFrame = await _mediaCapture.GetPreviewFrameAsync(videoFrame))
{
// Collect the resulting frame
SoftwareBitmap previewFrame = currentFrame.SoftwareBitmap;
var data = Decode(previewFrame);
if (data.Count > 0)
{
var sb = new StringBuilder();
foreach (var d in data)
{
DebugUtil.Log(d);
sb.Append(d);
}
SonyQrData qrdata = null;
try
{
qrdata = SonyQrDataParser.ParseData(sb.ToString());
}
catch (FormatException ex)
{
DebugUtil.Log(() => "QR data parse error: " + ex.Message);
}
// DebugText.Text = sb.ToString();
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
if (qrdata != null)
{
Frame.Navigate(typeof(EntrancePage), qrdata);
}
else
{
AppShell.Current.Toast.PushToast(new Controls.ToastContent {
Text = SystemUtil.GetStringResource("QrCodeIncompatible")
});
}
});
}
}
}
private async Task FindQrCode(VideoFrame currentFrame)
{
if (currentFrame == null)
{
return;
}
// Collect the resulting frame
SoftwareBitmap previewFrame = currentFrame.SoftwareBitmap;
var data = Decode(previewFrame);
if (data.Count > 0)
{
var sb = new StringBuilder();
foreach (var d in data)
{
DebugUtil.Log(d);
sb.Append(d);
}
SonyQrData qrdata = null;
try
{
qrdata = SonyQrDataParser.ParseData(sb.ToString());
}
catch (FormatException ex)
{
DebugUtil.Log(() => "QR data parse error: " + ex.Message);
}
// DebugText.Text = sb.ToString();
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
if (qrdata != null)
{
Frame.Navigate(typeof(EntrancePage), qrdata);
}
else
{
AppShell.Current.Toast.PushToast(new Controls.ToastContent {
Text = SystemUtil.GetStringResource("QrCodeIncompatible")
});
}
});
}
}