private void HandleOnPreviewFrameReady(object sender, FastJavaByteArray fastArray)
{
if (!CanAnalyzeFrame)
{
return;
}
_wasScanned = false;
_lastPreviewAnalysis = DateTime.UtcNow;
_processingTask = Task.Run(() =>
{
try
{
if (TakePicture)
{
TakePicture = false;
var raw = new byte[fastArray.Count];
fastArray.CopyTo(raw, 0);
var img = new YuvImage(raw, ImageFormatType.Nv21, _cameraController.Camera.GetParameters().PreviewSize.Width, _cameraController.Camera.GetParameters().PreviewSize.Height, null);
using (var stream = new MemoryStream())
{
var rect = new Rect(0, 0, img.Width, img.Height);
img.CompressToJpeg(rect, 80, stream);
var array = stream.ToArray();
OnPictureTaken?.Invoke(this, array);
stream.Close();
}
}
DecodeFrame(fastArray);
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}).ContinueWith(task =>
{
if (task.IsFaulted)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "DecodeFrame exception occurs");
}
}, TaskContinuationOptions.OnlyOnFaulted);
}
public static byte[] ConvertToJpg(this FastJavaByteArray self, int width, int height)
{
byte[] javaByteArray = new byte[self.Count];
self.CopyTo(javaByteArray, 0);
using (YuvImage yuvImage = new YuvImage(javaByteArray, ImageFormatType.Nv21, width, height, null))
{
using (Rect rect = new Rect(0, 0, width, height))
{
byte[] jpg = null;
using (var os = new MemoryStream())
{
yuvImage.CompressToJpeg(rect, 100, os);
jpg = os.ToArray();
os.Close();
}
return(jpg);
}
}
}
