public void OnPreviewFrame (byte [] bytes, Android.Hardware.Camera camera)
{
if ((DateTime.Now - lastPreviewAnalysis).TotalMilliseconds < 150)
return;
try
{
//Fix for image not rotating on devices
byte[] rotatedData = new byte[bytes.Length];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++)
rotatedData[x * height + height - y - 1] = bytes[x + y * width];
}
var cameraParameters = camera.GetParameters();
//Changed to using a YUV Image to get the byte data instead of manually working with it!
var img = new YuvImage(rotatedData, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null);
var dataRect = GetFramingRectInPreview();
var luminance = new PlanarYUVLuminanceSource (img.GetYuvData(), width, height, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false);
//var luminance = new PlanarYUVLuminanceSource(img.GetYuvData(), cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, 0, 0, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, false);
var binarized = new BinaryBitmap (new ZXing.Common.HybridBinarizer(luminance));
var result = reader.decodeWithState(binarized);
lastPreviewAnalysis = DateTime.Now;
if (result == null || string.IsNullOrEmpty (result.Text))
return;
Android.Util.Log.Debug("ZXing.Mobile", "Barcode Found: " + result.Text);
ShutdownCamera();
activity.OnScan (result);
} catch (ReaderException) {
Android.Util.Log.Debug("ZXing.Mobile", "No barcode Found");
// ignore this exception; it happens every time there is a failed scan
} catch (Exception){
// TODO: this one is unexpected.. log or otherwise handle it
throw;
}
}
public void OnPreviewFrame (byte [] bytes, Android.Hardware.Camera camera)
{
if ((DateTime.Now - lastPreviewAnalysis).TotalMilliseconds < options.DelayBetweenAnalyzingFrames)
return;
try
{
var cameraParameters = camera.GetParameters();
var img = new YuvImage(bytes, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null);
if (barcodeReader == null)
{
barcodeReader = new BarcodeReader(null, null, null, (p, w, h, f) =>
new PlanarYUVLuminanceSource(p, w, h, 0, 0, w, h, false));
//new PlanarYUVLuminanceSource(p, w, h, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false))
if (this.options.TryHarder.HasValue)
barcodeReader.Options.TryHarder = this.options.TryHarder.Value;
if (this.options.PureBarcode.HasValue)
barcodeReader.Options.PureBarcode = this.options.PureBarcode.Value;
if (!string.IsNullOrEmpty (this.options.CharacterSet))
barcodeReader.Options.CharacterSet = this.options.CharacterSet;
if (this.options.TryInverted.HasValue)
barcodeReader.TryInverted = this.options.TryInverted.Value;
if (this.options.PossibleFormats != null && this.options.PossibleFormats.Count > 0)
{
barcodeReader.Options.PossibleFormats = new List<BarcodeFormat>();
foreach (var pf in this.options.PossibleFormats)
barcodeReader.Options.PossibleFormats.Add(pf);
}
//Always autorotate on android
barcodeReader.AutoRotate = true;
}
//Try and decode the result
var result = barcodeReader.Decode(img.GetYuvData(), img.Width, img.Height, RGBLuminanceSource.BitmapFormat.Unknown);
lastPreviewAnalysis = DateTime.Now;
if (result == null || string.IsNullOrEmpty (result.Text))
return;
Android.Util.Log.Debug("ZXing.Mobile", "Barcode Found: " + result.Text);
ShutdownCamera();
callback(result);
} catch (ReaderException) {
Android.Util.Log.Debug("ZXing.Mobile", "No barcode Found");
// ignore this exception; it happens every time there is a failed scan
} catch (Exception) {
// TODO: this one is unexpected.. log or otherwise handle it
throw;
}
}
public void OnPreviewFrame (byte [] bytes, Android.Hardware.Camera camera)
{
if ((DateTime.Now - lastPreviewAnalysis).TotalMilliseconds < options.DelayBetweenAnalyzingFrames)
return;
try
{
/* OLD Android Code
//Fix for image not rotating on devices
byte[] rotatedData = new byte[bytes.Length];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++)
rotatedData[x * height + height - y - 1] = bytes[x + y * width];
}
var cameraParameters = camera.GetParameters();
//Changed to using a YUV Image to get the byte data instead of manually working with it!
var img = new YuvImage(rotatedData, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null);
var dataRect = GetFramingRectInPreview();
var luminance = new PlanarYUVLuminanceSource (img.GetYuvData(), width, height, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false);
//var luminance = new PlanarYUVLuminanceSource(img.GetYuvData(), cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, 0, 0, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, false);
var binarized = new BinaryBitmap (new ZXing.Common.HybridBinarizer(luminance));
var result = reader.decodeWithState(binarized);
*/
var cameraParameters = camera.GetParameters();
var img = new YuvImage(bytes, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null);
var dataRect = GetFramingRectInPreview();
//var barcodeReader = new BarcodeReader(null, p => new PlanarYUVLuminanceSource(img.GetYuvData(), img.Width, img.Height, dataRect.Left, dataRect.Top,
// dataRect.Width(), dataRect.Height(), false), null, null)
//{
// AutoRotate = true,
// TryHarder = true,
//};
var barcodeReader = new BarcodeReader(null, null, null, (p, w, h, f) =>
new PlanarYUVLuminanceSource(p, w, h, 0, 0, w, h, false))
//new PlanarYUVLuminanceSource(p, w, h, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false))
{
AutoRotate = true,
TryHarder = false
};
if (this.options.PureBarcode.HasValue && this.options.PureBarcode.Value)
barcodeReader.PureBarcode = this.options.PureBarcode.Value;
if (this.options.PossibleFormats != null && this.options.PossibleFormats.Count > 0)
barcodeReader.PossibleFormats = this.options.PossibleFormats;
var result = barcodeReader.Decode(img.GetYuvData(), img.Width, img.Height, RGBLuminanceSource.BitmapFormat.Unknown);
lastPreviewAnalysis = DateTime.Now;
if (result == null || string.IsNullOrEmpty (result.Text))
return;
Android.Util.Log.Debug("ZXing.Mobile", "Barcode Found: " + result.Text);
ShutdownCamera();
activity.OnScan (result);
} catch (ReaderException) {
Android.Util.Log.Debug("ZXing.Mobile", "No barcode Found");
// ignore this exception; it happens every time there is a failed scan
} catch (Exception){
// TODO: this one is unexpected.. log or otherwise handle it
throw;
}
}
