private void DecodeSample()
{
MediaSample2D sample;
lock (this)
{
sample = m_sample;
}
if (sample == null)
{
return;
}
Logger.Events.VideoBarcodeReader_DecodeSampleStart();
int scale = (int)Math.Round(Math.Max(sample.Width / 640.0, sample.Height / 480.0));
var e = new SampleDecodedEventArgs();
using (sample)
using (var scaledSample = m_processor.Convert(sample, MediaSample2DFormat.Bgra8, sample.Width / scale, sample.Height / scale))
using (var buffer = scaledSample.LockBuffer(BufferAccessMode.Read))
{
var plane = buffer.Planes[0];
var result = m_barcodeReader.Decode(
plane.Buffer.ToArray(),
buffer.Width,
buffer.Height,
BitmapFormat.BGR32
);
if (result != null)
{
e.Text = result.Text;
for (int n = 0; n < result.ResultPoints.Length; n++)
{
e.Points.Add(new Point(result.ResultPoints[n].X / scaledSample.Width, result.ResultPoints[n].Y / scaledSample.Height));
}
}
}
Logger.Events.VideoBarcodeReader_DecodeSampleStop(e.Text);
lock (this)
{
m_sample = null;
}
if (SampleDecoded != null)
{
SampleDecoded(this, e);
}
}
void barcodeReader_SampleDecoded(VideoBarcodeReader sender, SampleDecodedEventArgs e)
{
var ignore = Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
if (e.Text == null)
{
BarcodeOutline.Points.Clear();
TextLog.Text = "No barcode";
}
else
{
TextLog.Text = e.Text;
BarcodeOutline.Points.Clear();
foreach (var point in e.Points)
{
BarcodeOutline.Points.Add(new Point(point.X * BarcodeOutline.Width, point.Y * BarcodeOutline.Height));
}
}
});
}
