private void DecodeFrame(FastJavaByteArray fastArray)
{
var cameraParameters = _cameraController.Camera.GetParameters();
var width = cameraParameters.PreviewSize.Width;
var height = cameraParameters.PreviewSize.Height;
var barcodeReader = _scannerHost.ScanningOptions.BuildBarcodeReader();
var rotate = false;
var newWidth = width;
var newHeight = height;
// use last value for performance gain
var cDegrees = _cameraController.LastCameraDisplayOrientationDegree;
//if (cDegrees == 90 || cDegrees == 270)
//{
// rotate = true;
// newWidth = height;
// newHeight = width;
//}
ZXing.Result result = null;
var start = PerformanceCounter.Start();
//LuminanceSource fast = new FastJavaByteArrayYUVLuminanceSource(fastArray, width, height, 0, 0, width, height); // _area.Left, _area.Top, _area.Width, _area.Height);
// cut square in the middle
LuminanceSource fast = new FastJavaByteArrayYUVLuminanceSource(
fastArray,
width,
height,
(width - Math.Min(width, height)) / 2,
(height - Math.Min(width, height)) / 2,
Math.Min(width, height),
Math.Min(width, height)
);
if (rotate)
{
fast = fast.rotateCounterClockwise();
}
result = barcodeReader.Decode(fast);
fastArray.Dispose();
fastArray = null;
PerformanceCounter.Stop(start,
"Decode Time: {0} ms (width: " + width + ", height: " + height + ", degrees: " + cDegrees + ", rotate: " +
rotate + ")");
if (result != null)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Barcode Found: " + result.Text);
_wasScanned = true;
BarcodeFound?.Invoke(this, result);
return;
}
}
void DecodeFrame(FastJavaByteArray fastArray)
{
var resolution = cameraController.CameraResolution;
var width = resolution.Width;
var height = resolution.Height;
var rotate = false;
var newWidth = width;
var newHeight = height;
// use last value for performance gain
var cDegrees = cameraController.LastCameraDisplayOrientationDegree;
if (cDegrees == 90 || cDegrees == 270)
{
rotate = true;
newWidth = height;
newHeight = width;
}
var start = PerformanceCounter.Start();
LuminanceSource fast = new FastJavaByteArrayYUVLuminanceSource(fastArray, width, height, 0, 0, width, height); // _area.Left, _area.Top, _area.Width, _area.Height);
if (rotate)
{
fast = fast.rotateCounterClockwise();
}
var result = barcodeReader.Decode(fast);
fastArray.Dispose();
fastArray = null;
PerformanceCounter.Stop(start,
"Decode Time: {0} ms (width: " + width + ", height: " + height + ", degrees: " + cDegrees + ", rotate: " +
rotate + ")");
if (result != null)
{
// Convert LuminanceSource to grey-scale Bitmap array
var grayscale_image = fast.Matrix;
var imageBytes = new byte[fast.Width, fast.Height];
for (var y = 0; y < fast.Height; y++)
{
for (var x = 0; x < fast.Width; x++)
{
var value = grayscale_image[y * fast.Width + x];
imageBytes[x, y] = value;
}
}
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Barcode Found");
wasScanned = true;
BarcodeFound?.Invoke(new ScanResult(result, imageBytes));
return;
}
}
private void DecodeFrame(FastJavaByteArray fastArray)
{
var cameraParameters = _cameraController.Camera.GetParameters();
var width = cameraParameters.PreviewSize.Width;
var height = cameraParameters.PreviewSize.Height;
InitBarcodeReaderIfNeeded();
var rotate = false;
var newWidth = width;
var newHeight = height;
// use last value for performance gain
var cDegrees = _cameraController.LastCameraDisplayOrientationDegree;
if (cDegrees == 90 || cDegrees == 270)
{
rotate = true;
newWidth = height;
newHeight = width;
}
ZXing.Result result = null;
var start = PerformanceCounter.Start();
LuminanceSource luminanceSource;
var fast = new FastJavaByteArrayYUVLuminanceSource(fastArray, width, height, 0, 0, width, height); // _area.Left, _area.Top, _area.Width, _area.Height);
if (rotate)
{
fast.CopyMatrix(ref _matrix);
RotateCounterClockwise(_matrix, ref _rotatedMatrix, width, height); // _area.Width, _area.Height);
luminanceSource = new PlanarYUVLuminanceSource(_rotatedMatrix, height, width, 0, 0, height, width, false); // _area.Height, _area.Width, 0, 0, _area.Height, _area.Width, false);
}
else
{
luminanceSource = fast;
}
result = _barcodeReader.Decode(luminanceSource);
fastArray.Dispose();
fastArray = null;
PerformanceCounter.Stop(start,
"Decode Time: {0} ms (width: " + width + ", height: " + height + ", degrees: " + cDegrees + ", rotate: " +
rotate + ")");
if (result != null)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Barcode Found: " + result.Text);
_wasScanned = true;
BarcodeFound?.Invoke(this, result);
return;
}
}
void DecodeFrame(FastJavaByteArray fastArray)
{
var resolution = cameraController.CameraResolution;
var width = resolution.Width;
var height = resolution.Height;
var rotate = false;
var newWidth = width;
var newHeight = height;
// use last value for performance gain
var cDegrees = cameraController.LastCameraDisplayOrientationDegree;
if (cDegrees == 90 || cDegrees == 270)
{
rotate = true;
newWidth = height;
newHeight = width;
}
var start = PerformanceCounter.Start();
LuminanceSource fast = new FastJavaByteArrayYUVLuminanceSource(fastArray, width, height, 0, 0, width, height); // _area.Left, _area.Top, _area.Width, _area.Height);
if (rotate)
{
fast = fast.rotateCounterClockwise();
}
var result = barcodeReader.Decode(fast);
fastArray.Dispose();
fastArray = null;
PerformanceCounter.Stop(start,
"Decode Time: {0} ms (width: " + width + ", height: " + height + ", degrees: " + cDegrees + ", rotate: " +
rotate + ")");
if (result != null)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Barcode Found");
wasScanned = true;
BarcodeFound?.Invoke(result);
return;
}
}
void DecodeFrame(FastJavaByteArray fastArray)
{
var rotate = DeviceDisplay.MainDisplayInfo.Orientation == DisplayOrientation.Portrait;
var start = PerformanceCounter.Start();
//only calculate the variables needed for decoding if the camera is rotated or the CustomScanAreaView (if used) is changed
if (lastDecodedCameraDisplayRotationDegree != cameraController.CurrentCameraDisplayRotationDegree || needRecalculateDecodingVariables)
{
if (surfaceView != null && surfaceView.UsingCustomScanArea)
{
SetDecodeVariablesForCustomScanArea();
}
else
{
SetDecodeVariablesForWholeScreen();
}
lastDecodedCameraDisplayRotationDegree = cameraController.CurrentCameraDisplayRotationDegree;
needRecalculateDecodingVariables = false;
}
var barcodeReader = scannerHost.ScanningOptions.BuildBarcodeReader();
LuminanceSource fast;
if (rotate)
{
//for decoding it is expected that the FastJavaByteArrayYUVLuminanceSource will be in landscape orientation
//if we are in portrait mode the array must be rotated
//also since we are in portrait mode and all dimensions are calculated from the perspective of the user they must be
//given to the constructor flipped
fast = new FastJavaByteArrayYUVLuminanceSource(fastArray, heightCamera, widthCamera,
offsetScanAreaTopPixelsScaled,
offsetScanAreaLeftPixelsScaled,
heightScanAreaScaled,
widthScanAreaScaled).rotateCounterClockwise();
}
else
{
//while in landscape mode the FastJavaByteArrayYUVLuminanceSource paramater names match up with the names of the calculated values
fast = new FastJavaByteArrayYUVLuminanceSource(fastArray, widthCamera, heightCamera,
offsetScanAreaLeftPixelsScaled,
offsetScanAreaTopPixelsScaled,
widthScanAreaScaled,
heightScanAreaScaled);
}
var result = barcodeReader.Decode(fast);
fastArray.Dispose();
fastArray = null;
PerformanceCounter.Stop(start,
"Decode Time: {0} ms (width: " + widthCamera + ", height: " + heightCamera + ", degrees: " + lastDecodedCameraDisplayRotationDegree + ", rotate: " +
rotate + ")");
if (result != null)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Barcode Found");
wasScanned = true;
BarcodeFound?.Invoke(result);
return;
}
}
private void DecodeFrame(FastJavaByteArray fastArray)
{
var cameraParameters = _cameraController.Camera.GetParameters();
var width = cameraParameters.PreviewSize.Width;
var height = cameraParameters.PreviewSize.Height;
var barcodeReader = _scannerHost.ScanningOptions.BuildBarcodeReader();
var rotate = false;
var newWidth = width;
var newHeight = height;
// use last value for performance gain
var cDegrees = _cameraController.LastCameraDisplayOrientationDegree;
if (cDegrees == 90 || cDegrees == 270)
{
rotate = true;
newWidth = height;
newHeight = width;
}
ZXing.Result result = null;
var start = PerformanceCounter.Start();
/// <summary>
///START - Scanning Improvement, VK Apacheta Corp 11/14/2018
///Added a new frame to get the center part of the captured image.
///To create a FastJavaByteArray from the cropped captured frame and use it to decode the barcode.
///To decrease the processing time drastically for higher resolution cameras.
/// </summary>
var frame_width = width * 3 / 5;
var frame_height = height * 3 / 5;
var frame_left = width * 1 / 5;
var frame_top = height * 1 / 5;
LuminanceSource fast = new FastJavaByteArrayYUVLuminanceSource(fastArray, width, height,
//framingRectPreview?.Width() ?? width,
// framingRectPreview?.Height() ?? height,
frame_left,
frame_top,
frame_width,
frame_height); // _area.Left, _area.Top, _area.Width, _area.Height);
/// <summary>
///END - Scanning Improvement, VK Apacheta Corp 11/14/2018
/// </summary>
if (rotate)
{
fast = fast.rotateCounterClockwise();
}
result = barcodeReader.Decode(fast);
fastArray.Dispose();
fastArray = null;
PerformanceCounter.Stop(start,
$"width: {width}, height: {height}, frame_top :{frame_top}, frame_left: {frame_left}, frame_width: {frame_width}, frame_height: {frame_height}, degrees: {cDegrees}, rotate: {rotate}; " + "Decode Time: {0} ms");
if (result != null)
{
Log.Debug(MobileBarcodeScanner.TAG, "Barcode Found");
_wasScanned = true;
BarcodeFound?.Invoke(this, result);
return;
}
}
