private async Task ScanAsync()
{
if (_cameraInitialized)
{
_result = null;
while (_result == null)
{
// 对焦
await _mediaCapture.VideoDeviceController.FocusControl.FocusAsync();
var previewProperties = _mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview) as VideoEncodingProperties;
if (previewProperties != null)
{
var videoFrame = new VideoFrame(BitmapPixelFormat.Bgra8, (int)previewProperties.Width, (int)previewProperties.Height);
using (var currentFrame = await _mediaCapture.GetPreviewFrameAsync(videoFrame))
{
var frameBitmap = currentFrame.SoftwareBitmap;
if (frameBitmap != null)
{
var bitmap = new WriteableBitmap(frameBitmap.PixelWidth, frameBitmap.PixelHeight);
frameBitmap.CopyToBuffer(bitmap.PixelBuffer);
// 解析二维码
BarcodeReader barcodeReader = new BarcodeReader()
{
AutoRotate = true,
Options = new DecodingOptions()
{
TryHarder = true
}
};
_result = barcodeReader.Decode(bitmap);
if (_result != null)
{
Debug.WriteLine($"扫描到二维码:{_result.Text}");
QRCodeFound?.Invoke(qrCode, new QRCodeFoundEventArgs()
{
Result = _result
});
}
}
}
}
}
}
}
private void QRCodeWatcher_Updated(object sender, QRCodeUpdatedEventArgs e)
{
SendProgressMessage($"Found QR code {e.Code.Data}");
QRCodeFound?.Invoke(this, new QRInfo(e.Code));
}