public void SurfaceCreated(ISurfaceHolder holder)
{
CheckPermissions();
try
{
var version = Android.OS.Build.VERSION.SdkInt;
if (version >= BuildVersionCodes.Gingerbread)
{
var numCameras = Android.Hardware.Camera.NumberOfCameras;
var camInfo = new Android.Hardware.Camera.CameraInfo();
var found = false;
for (int i = 0; i < numCameras; i++)
{
Android.Hardware.Camera.GetCameraInfo(i, camInfo);
if (camInfo.Facing == CameraFacing.Back)
{
camera = Android.Hardware.Camera.Open(i);
found = true;
break;
}
}
if (!found)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Finding rear camera failed, opening camera 0...");
camera = Android.Hardware.Camera.Open(0);
}
}
else
{
camera = Android.Hardware.Camera.Open();
}
if (camera == null)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Camera is null :(");
}
//camera = Android.Hardware.Camera.Open ();
camera.SetPreviewDisplay(holder);
camera.SetPreviewCallback(this);
} catch (Exception ex) {
ShutdownCamera();
// TODO: log or otherwise handle this exception
Console.WriteLine("Setup Error: " + ex);
//throw;
}
}
public void SetupLiveCameraStream()
{
lock (lockObj)
{
if (surface == null)
{
return;
}
try
{
camera = Android.Hardware.Camera.Open(1);
camera.SetDisplayOrientation(90);
var cameraParams = camera.GetParameters();
foreach (Android.Hardware.Camera.Size size in cameraParams.SupportedPreviewSizes)
{
if (size.Width <= 176)
{
cameraParams.SetPreviewSize(size.Width, size.Height);
}
}
camera.SetParameters(cameraParams);
camera.SetPreviewTexture(surface);
camera.SetPreviewCallback(this);
camera.StartPreview();
}
catch (Java.IO.IOException ex)
{
}
}
}
public void ShutdownCamera()
{
if (Camera == null)
{
return;
}
// camera release logic takes about 0.005 sec so there is no need in async releasing
var perf = PerformanceCounter.Start();
try
{
try
{
Camera.SetPreviewCallback(null);
Camera.SetPreviewDisplay(null);
Camera.StopPreview();
}
catch (Exception ex)
{
Android.Util.Log.Error(MobileBarcodeScanner.TAG, ex.ToString());
}
Camera.Release();
Camera = null;
}
catch (Exception e)
{
Android.Util.Log.Error(MobileBarcodeScanner.TAG, e.ToString());
}
PerformanceCounter.Stop(perf, "Shutdown camera took {0}ms");
}
public bool OnSurfaceTextureDestroyed(SurfaceTexture surface)
{
camera.StopPreview();
camera.SetPreviewCallback(null);
camera.Release();
return(true);
}
public void ShutdownCamera()
{
tokenSource.Cancel();
if (camera != null)
{
camera.SetPreviewCallback(null);
camera.StopPreview();
camera.Release();
camera = null;
}
}
private void StartCamera()
{
holder = view.Holder;
holder.AddCallback(this);
camera = Android.Hardware.Camera.Open(1);
Android.Hardware.Camera.Parameters p = camera.GetParameters();
p.SetPreviewSize(320, 240);
camera.SetDisplayOrientation(90);
camera.SetParameters(p);
camera.SetPreviewCallback(this);
}
public void SurfaceCreated(ISurfaceHolder holder)
{
try {
camera = Android.Hardware.Camera.Open();
camera.SetPreviewDisplay(holder);
camera.SetPreviewCallback(this);
} catch (Exception) {
ShutdownCamera();
// TODO: log or otherwise handle this exception
//throw;
}
}
public void SurfaceCreated (ISurfaceHolder holder)
{
try {
camera = Camera.Open ();
camera.SetPreviewDisplay (holder);
camera.SetPreviewCallback (this);
} catch (Exception e) {
ShutdownCamera ();
// TODO: log or otherwise handle this exception
throw;
}
}
public BarcodeScannerRenderer(Context context) : base(context)
{
cameraInfo = new Camera.CameraInfo();
Camera.GetCameraInfo(0, cameraInfo);
cam = Camera.Open(0);
parameters = cam.GetParameters();
Camera.Size size = parameters.PictureSize;
cheight = size.Height;
cwidth = size.Width;
maxZoom = parameters.MaxZoom;
cam.SetPreviewCallback(this);
}
public void SurfaceCreated(ISurfaceHolder holder)
{
try
{
camera.SetPreviewDisplay(holder);
camera.SetDisplayOrientation(90);
camera.SetPreviewCallback(new MyPreviewCallback()
{
v = output
});
camera.StartPreview();
}
catch (Java.IO.IOException e)
{
throw e;
}
}
public void SurfaceCreated(ISurfaceHolder holder)
{
try
{
#if __ANDROID_9__
var numCameras = Android.Hardware.Camera.NumberOfCameras;
var camInfo = new Android.Hardware.Camera.CameraInfo();
var found = false;
for (int i = 0; i < numCameras; i++)
{
Android.Hardware.Camera.GetCameraInfo(i, camInfo);
if (camInfo.Facing == CameraFacing.Back)
{
camera = Android.Hardware.Camera.Open(i);
found = true;
break;
}
}
if (!found)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Finding rear camera failed, opening camera 0...");
camera = Android.Hardware.Camera.Open(0);
}
#else
camera = Android.Hardware.Camera.Open();
#endif
if (camera == null)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Camera is null :(");
}
//camera = Android.Hardware.Camera.Open ();
camera.SetPreviewDisplay(holder);
camera.SetPreviewCallback(this);
}
catch (Exception)
{
ShutdownCamera();
// TODO: log or otherwise handle this exception
//throw;
}
}
public void OnSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
mCamera = Open();
mCameraInfo = GetCameraInfo();
//https://www.captechconsulting.com/blogs/android-camera-orientation-made-simple
mCamera.SetDisplayOrientation(getCorrectCameraOrientation(mCameraInfo, mCamera));
try {
mCamera.SetPreviewTexture(surface);
mCamera.SetPreviewCallback(this);
mCamera.StartPreview();
} catch (IOException ioe) {
// Something bad happened
}
}
public void OnSurfaceTextureAvailable(Android.Graphics.SurfaceTexture surface, int width, int height)
{
_camera = Camera.Open ();
ConfigureCamera ();
Preview preview = new Preview ();
preview.OnFrame += OnPreviewFrame;
_camera.SetPreviewCallback (preview);
_textureView.LayoutParameters = new FrameLayout.LayoutParams (width, height);
try {
_camera.SetPreviewTexture (surface);
_camera.StartPreview ();
} catch (Exception e) {
Console.WriteLine (e.Message);
}
}
public void OnPreviewFrame (byte[] data, Camera camera)
{
var parameters = camera.GetParameters ();
var size = parameters.PreviewSize;
var barcode = new Image (size.Width, size.Height, "Y800");
barcode.SetData (data);
var result = scanner.ScanImage (barcode);
if (result == 0)
return;
camera.SetPreviewCallback (null);
camera.StopPreview ();
var scannerResult = GetScannerResult ();
ScanComplete?.Invoke (this, new ScanCompleteEventArgs (scannerResult));
}
public void start()
{
if (originalStart)
{
originalStart = false;
Thread t = new Thread(new ThreadStart(reStarter));
t.Start();
}
try
{
cam = Android.Hardware.Camera.Open();
cam.GetParameters().PreviewFormat = ImageFormatType.Rgb565;
var param = cam.GetParameters();
param.SetPreviewSize(320, 240);
cam.SetParameters(param);
var x = cam.GetParameters().SupportedPreviewSizes;
cam.SetDisplayOrientation(90);
cam.SetPreviewCallback(this);
cam.SetPreviewTexture(image.SurfaceTexture);
cam.StartPreview();
}
catch (Exception e) { }
}
async Task SetupCamera()
{
if (camera != null)
{
return;
}
await tcsSurfaceReady.Task;
lastPreviewAnalysis = DateTime.UtcNow.AddMilliseconds(this.scanningOptions.InitialDelayBeforeAnalyzingFrames);
isAnalyzing = true;
CheckCameraPermissions();
var perf = PerformanceCounter.Start();
GetExclusiveAccess();
try {
var version = Build.VERSION.SdkInt;
if (version >= BuildVersionCodes.Gingerbread)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Checking Number of cameras...");
var numCameras = Camera.NumberOfCameras;
var camInfo = new Camera.CameraInfo();
var found = false;
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Found " + numCameras + " cameras...");
var whichCamera = CameraFacing.Back;
if (this.scanningOptions.UseFrontCameraIfAvailable.HasValue && this.scanningOptions.UseFrontCameraIfAvailable.Value)
{
whichCamera = CameraFacing.Front;
}
for (int i = 0; i < numCameras; i++)
{
Camera.GetCameraInfo(i, camInfo);
if (camInfo.Facing == whichCamera)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Found " + whichCamera + " Camera, opening...");
camera = Camera.Open(i);
cameraId = i;
found = true;
break;
}
}
if (!found)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Finding " + whichCamera + " camera failed, opening camera 0...");
camera = Camera.Open(0);
cameraId = 0;
}
}
else
{
camera = Camera.Open();
}
if (camera != null)
{
camera.SetPreviewCallback(this);
}
else
{
MobileBarcodeScanner.LogWarn(MobileBarcodeScanner.TAG, "Camera is null :(");
return;
}
} catch (Exception ex) {
ShutdownCamera();
MobileBarcodeScanner.LogError("Setup Error: {0}", ex);
return;
}
PerformanceCounter.Stop(perf, "Setup Camera took {0}ms");
perf = PerformanceCounter.Start();
var parameters = camera.GetParameters();
parameters.PreviewFormat = ImageFormatType.Nv21;
// First try continuous video, then auto focus, then fixed
var supportedFocusModes = parameters.SupportedFocusModes;
if (Build.VERSION.SdkInt >= BuildVersionCodes.IceCreamSandwich &&
supportedFocusModes.Contains(Camera.Parameters.FocusModeContinuousPicture))
{
parameters.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
}
else if (supportedFocusModes.Contains(Camera.Parameters.FocusModeContinuousVideo))
{
parameters.FocusMode = Camera.Parameters.FocusModeContinuousVideo;
}
else if (supportedFocusModes.Contains(Camera.Parameters.FocusModeAuto))
{
parameters.FocusMode = Camera.Parameters.FocusModeAuto;
}
else if (supportedFocusModes.Contains(Camera.Parameters.FocusModeFixed))
{
parameters.FocusMode = Camera.Parameters.FocusModeFixed;
}
var selectedFps = parameters.SupportedPreviewFpsRange.FirstOrDefault();
if (selectedFps != null)
{
// This will make sure we select a range with the lowest minimum FPS
// and maximum FPS which still has the lowest minimum
// This should help maximize performance / support for hardware
foreach (var fpsRange in parameters.SupportedPreviewFpsRange)
{
if (fpsRange [0] <= selectedFps [0] &&
fpsRange [1] > selectedFps [1])
{
selectedFps = fpsRange;
}
}
parameters.SetPreviewFpsRange(selectedFps [0], selectedFps [1]);
}
var availableResolutions = new List <CameraResolution> ();
foreach (var sps in parameters.SupportedPreviewSizes)
{
availableResolutions.Add(new CameraResolution {
Width = sps.Width,
Height = sps.Height
});
}
// Try and get a desired resolution from the options selector
var resolution = scanningOptions.GetResolution(availableResolutions);
// If the user did not specify a resolution, let's try and find a suitable one
if (resolution == null)
{
// Loop through all supported sizes
foreach (var sps in parameters.SupportedPreviewSizes)
{
// Find one that's >= 640x360 but <= 1000x1000
// This will likely pick the *smallest* size in that range, which should be fine
if (sps.Width >= 640 && sps.Width <= 1000 && sps.Height >= 360 && sps.Height <= 1000)
{
resolution = new CameraResolution {
Width = sps.Width,
Height = sps.Height
};
break;
}
}
}
// Google Glass requires this fix to display the camera output correctly
if (Build.Model.Contains("Glass"))
{
resolution = new CameraResolution {
Width = 640,
Height = 360
};
// Glass requires 30fps
parameters.SetPreviewFpsRange(30000, 30000);
}
// Hopefully a resolution was selected at some point
if (resolution != null)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Selected Resolution: " + resolution.Width + "x" + resolution.Height);
parameters.SetPreviewSize(resolution.Width, resolution.Height);
}
camera.SetParameters(parameters);
SetCameraDisplayOrientation(this.activity);
camera.SetPreviewDisplay(this.Holder);
camera.StartPreview();
PerformanceCounter.Stop(perf, "Setup Camera Parameters took {0}ms");
// Docs suggest if Auto or Macro modes, we should invoke AutoFocus at least once
var currentFocusMode = camera.GetParameters().FocusMode;
if (currentFocusMode == Camera.Parameters.FocusModeAuto ||
currentFocusMode == Camera.Parameters.FocusModeMacro)
{
AutoFocus();
}
}
/// <summary>
/// Create the camera and try to set auto focus with flash
/// </summary>
/// <param name="holder"></param>
public void CreateCamera(ISurfaceHolder holder) {
try
{
_camera = Camera.Open();
Camera.Parameters p = _camera.GetParameters();
p.PictureFormat = Android.Graphics.ImageFormatType.Jpeg;
p.JpegQuality = 100;
hasAutoFocus = (p.SupportedFocusModes.Contains(Camera.Parameters.FocusModeAuto));
if (hasAutoFocus)
{
p.FocusMode = Camera.Parameters.FocusModeAuto;
focusReady = true;
}
else if (p.SupportedFocusModes.Contains(Camera.Parameters.FocusModeContinuousPicture))
{
p.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
}
if (p.SupportedFlashModes.Contains(Camera.Parameters.FlashModeOn))
{
p.FlashMode = Camera.Parameters.FlashModeOn;
}
_camera.SetParameters(p);
_camera.SetDisplayOrientation(90);
_camera.SetPreviewCallback(this);
_camera.Lock();
_camera.SetPreviewDisplay(holder);
_camera.StartPreview();
if (hasAutoFocus)
{
Toast.MakeText(this, "Press screen to focus", ToastLength.Long).Show();
}
}
catch (Exception e)
{
}
}
public void SurfaceCreated (ISurfaceHolder holder)
{
try {
Console.WriteLine("Surface created");
camera = Android.Hardware.Camera.Open ();
camera.SetPreviewDisplay (holder);
camera.SetPreviewCallback (this);
Console.WriteLine("Surface Created end");
} catch (Exception) {
ShutdownCamera ();
Console.WriteLine("Exception, shutdown camera");
// TODO: log or otherwise handle this exception
//throw;
}
}
public void SurfaceCreated (ISurfaceHolder holder)
{
try
{
#if __ANDROID_9__
var numCameras = Android.Hardware.Camera.NumberOfCameras;
var camInfo = new Android.Hardware.Camera.CameraInfo();
var found = false;
for (int i = 0; i < numCameras; i++)
{
Android.Hardware.Camera.GetCameraInfo(i, camInfo);
if (camInfo.Facing == CameraFacing.Back)
{
camera = Android.Hardware.Camera.Open(i);
found = true;
break;
}
}
if (!found)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Finding rear camera failed, opening camera 0...");
camera = Android.Hardware.Camera.Open(0);
}
#else
camera = Android.Hardware.Camera.Open();
#endif
if (camera == null)
Android.Util.Log.Debug("ZXing.Net.Mobile", "Camera is null :(");
//camera = Android.Hardware.Camera.Open ();
camera.SetPreviewDisplay (holder);
camera.SetPreviewCallback (this);
} catch (Exception ex) {
ShutdownCamera ();
// TODO: log or otherwise handle this exception
Console.WriteLine("Setup Error: " + ex);
//throw;
}
}
protected override void OnStart()
{
try
{
if (Camera == null)
{
Camera = Hardware.Camera.Open(cameraIndex);
}
if (Texture == null)
{
Texture = new Graphics.SurfaceTexture(0);
}
CameraPreviewCallback callback = new CameraPreviewCallback();
callback.PreviewUpdated += Callback_PreviewUpdated;
Hardware.Camera.Parameters parameter = Camera.GetParameters();
List <Hardware.Camera.Size> supportSize = parameter.SupportedPreviewSizes.OrderByDescending(x => x.Width).ToList();
foreach (Hardware.Camera.Size size in supportSize)
{
CvLogger.Log(this, $"Camera Support Size: W{size.Width},H{size.Height}");
if (size.Width == 960 && size.Height == 720)
{
parameter.SetPreviewSize(size.Width, size.Height);
CvLogger.Log(this, $"SET Camera Size: W{size.Width},H{size.Height}");
}
}
string[] supportedFocusMode = parameter.SupportedFocusModes.ToArray();
if (supportedFocusMode.Contains(Hardware.Camera.Parameters.FocusModeContinuousVideo))
{
parameter.FocusMode = Hardware.Camera.Parameters.FocusModeContinuousVideo;
}
else if (supportedFocusMode.Contains(Hardware.Camera.Parameters.FocusModeContinuousPicture))
{
parameter.FocusMode = Hardware.Camera.Parameters.FocusModeContinuousPicture;
}
parameter.ColorEffect = Hardware.Camera.Parameters.EffectNone;
width = parameter.PreviewSize.Width;
height = parameter.PreviewSize.Height;
fps = parameter.PreviewFrameRate;
cameraType = parameter.PreviewFormat;
CvLogger.Log(this, string.Format("Camera is creating W{0} H{1} FPS{2}", width, height, fps));
Camera.SetParameters(parameter);
Camera.SetPreviewCallback(callback);
Camera.SetPreviewTexture(Texture);
Camera.StartPreview();
cameraOn = true;
}
catch (Exception ex)
{
CvLogger.Log(this, "Camera Init Failed.\n" + ex.ToString());
Dispose();
throw new ArgumentException("Camera Exception", ex);
}
}
private void OpenCamera()
{
try
{
var version = Build.VERSION.SdkInt;
if (version >= BuildVersionCodes.Gingerbread)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Checking Number of cameras...");
var numCameras = Camera.NumberOfCameras;
var camInfo = new Camera.CameraInfo();
var found = false;
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Found " + numCameras + " cameras...");
var whichCamera = CameraFacing.Back;
if (_scanningOptions.UseFrontCameraIfAvailable.HasValue &&
_scanningOptions.UseFrontCameraIfAvailable.Value)
{
whichCamera = CameraFacing.Front;
}
for (var i = 0; i < numCameras; i++)
{
Camera.GetCameraInfo(i, camInfo);
if (camInfo.Facing == whichCamera)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG,
"Found " + whichCamera + " Camera, opening...");
Camera = Camera.Open(i);
_cameraId = i;
found = true;
break;
}
}
if (!found)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG,
"Finding " + whichCamera + " camera failed, opening camera 0...");
Camera = Camera.Open(0);
_cameraId = 0;
}
}
else
{
Camera = Camera.Open();
}
if (Camera != null)
{
Camera.SetPreviewCallback(_cameraEventListener);
}
else
{
MobileBarcodeScanner.LogWarn(MobileBarcodeScanner.TAG, "Camera is null :(");
}
}
catch (Exception ex)
{
ShutdownCamera();
MobileBarcodeScanner.LogError("Setup Error: {0}", ex);
}
}
public void SurfaceCreated(ISurfaceHolder holder)
{
CheckPermissions();
var perf = PerformanceCounter.Start();
try
{
var version = Android.OS.Build.VERSION.SdkInt;
if (version >= BuildVersionCodes.Gingerbread)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Checking Number of cameras...");
var numCameras = Android.Hardware.Camera.NumberOfCameras;
var camInfo = new Android.Hardware.Camera.CameraInfo();
var found = false;
Android.Util.Log.Debug("ZXing.Net.Mobile", "Found " + numCameras + " cameras...");
var whichCamera = CameraFacing.Back;
if (options.UseFrontCameraIfAvailable.HasValue && options.UseFrontCameraIfAvailable.Value)
{
whichCamera = CameraFacing.Front;
}
for (int i = 0; i < numCameras; i++)
{
Android.Hardware.Camera.GetCameraInfo(i, camInfo);
if (camInfo.Facing == whichCamera)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Found " + whichCamera + " Camera, opening...");
camera = Android.Hardware.Camera.Open(i);
found = true;
break;
}
}
if (!found)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Finding " + whichCamera + " camera failed, opening camera 0...");
camera = Android.Hardware.Camera.Open(0);
}
}
else
{
camera = Android.Hardware.Camera.Open();
}
if (camera == null)
{
Android.Util.Log.Debug("ZXing.Net.Mobile", "Camera is null :(");
}
//camera = Android.Hardware.Camera.Open ();
camera.SetPreviewDisplay(holder);
camera.SetPreviewCallback(this);
}
catch (Exception ex)
{
ShutdownCamera();
// TODO: log or otherwise handle this exception
Console.WriteLine("Setup Error: " + ex);
//throw;
}
PerformanceCounter.Stop(perf, "SurfaceCreated took {0}ms");
}
public async Task StartScanningAsync(Action <Result> scanResultCallback, MobileBarcodeScanningOptions options = null)
{
this.callback = scanResultCallback;
this.scanningOptions = options ?? MobileBarcodeScanningOptions.Default;
lastPreviewAnalysis = DateTime.UtcNow.AddMilliseconds(this.scanningOptions.InitialDelayBeforeAnalyzingFrames);
isAnalyzing = true;
Console.WriteLine("StartScanning");
CheckCameraPermissions();
var perf = PerformanceCounter.Start();
GetExclusiveAccess();
try {
var version = Build.VERSION.SdkInt;
if (version >= BuildVersionCodes.Gingerbread)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Checking Number of cameras...");
var numCameras = Camera.NumberOfCameras;
var camInfo = new Camera.CameraInfo();
var found = false;
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Found " + numCameras + " cameras...");
var whichCamera = CameraFacing.Back;
if (this.scanningOptions.UseFrontCameraIfAvailable.HasValue && this.scanningOptions.UseFrontCameraIfAvailable.Value)
{
whichCamera = CameraFacing.Front;
}
for (int i = 0; i < numCameras; i++)
{
Camera.GetCameraInfo(i, camInfo);
if (camInfo.Facing == whichCamera)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Found " + whichCamera + " Camera, opening...");
camera = Camera.Open(i);
cameraId = i;
found = true;
break;
}
}
if (!found)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Finding " + whichCamera + " camera failed, opening camera 0...");
camera = Camera.Open(0);
cameraId = 0;
}
}
else
{
camera = Camera.Open();
}
if (camera == null)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Camera is null :(");
}
camera.SetPreviewCallback(this);
} catch (Exception ex) {
ShutdownCamera();
Console.WriteLine("Setup Error: " + ex);
}
PerformanceCounter.Stop(perf, "Camera took {0}ms");
if (!surfaceChanged)
{
await waitSurface.WaitAsync();
}
if (camera == null)
{
return;
}
perf = PerformanceCounter.Start();
var parameters = camera.GetParameters();
parameters.PreviewFormat = ImageFormatType.Nv21;
var availableResolutions = new List <CameraResolution> ();
foreach (var sps in parameters.SupportedPreviewSizes)
{
availableResolutions.Add(new CameraResolution {
Width = sps.Width,
Height = sps.Height
});
}
// Try and get a desired resolution from the options selector
var resolution = scanningOptions.GetResolution(availableResolutions);
// If the user did not specify a resolution, let's try and find a suitable one
if (resolution == null)
{
// Loop through all supported sizes
foreach (var sps in parameters.SupportedPreviewSizes)
{
// Find one that's >= 640x360 but <= 1000x1000
// This will likely pick the *smallest* size in that range, which should be fine
if (sps.Width >= 640 && sps.Width <= 1000 && sps.Height >= 360 && sps.Height <= 1000)
{
resolution = new CameraResolution {
Width = sps.Width,
Height = sps.Height
};
break;
}
}
}
// Google Glass requires this fix to display the camera output correctly
if (Build.Model.Contains("Glass"))
{
resolution = new CameraResolution {
Width = 640,
Height = 360
};
// Glass requires 30fps
parameters.SetPreviewFpsRange(30000, 30000);
}
// Hopefully a resolution was selected at some point
if (resolution != null)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Selected Resolution: " + resolution.Width + "x" + resolution.Height);
parameters.SetPreviewSize(resolution.Width, resolution.Height);
}
camera.SetParameters(parameters);
SetCameraDisplayOrientation(this.activity);
camera.SetPreviewDisplay(this.Holder);
camera.StartPreview();
PerformanceCounter.Stop(perf, "SurfaceChanged took {0}ms");
AutoFocus();
}
void OnSurfaceCreated()
{
surfaceCreated = true;
lastPreviewAnalysis = DateTime.UtcNow.AddMilliseconds(this.scanningOptions.InitialDelayBeforeAnalyzingFrames);
isAnalyzing = true;
Console.WriteLine("StartScanning");
CheckCameraPermissions();
var perf = PerformanceCounter.Start();
GetExclusiveAccess();
try {
var version = Build.VERSION.SdkInt;
if (version >= BuildVersionCodes.Gingerbread)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Checking Number of cameras...");
var numCameras = Camera.NumberOfCameras;
var camInfo = new Camera.CameraInfo();
var found = false;
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Found " + numCameras + " cameras...");
var whichCamera = CameraFacing.Back;
if (this.scanningOptions.UseFrontCameraIfAvailable.HasValue && this.scanningOptions.UseFrontCameraIfAvailable.Value)
{
whichCamera = CameraFacing.Front;
}
for (int i = 0; i < numCameras; i++)
{
Camera.GetCameraInfo(i, camInfo);
if (camInfo.Facing == whichCamera)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Found " + whichCamera + " Camera, opening...");
camera = Camera.Open(i);
cameraId = i;
found = true;
break;
}
}
if (!found)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Finding " + whichCamera + " camera failed, opening camera 0...");
camera = Camera.Open(0);
cameraId = 0;
}
}
else
{
camera = Camera.Open();
}
if (camera == null)
{
Android.Util.Log.Debug(MobileBarcodeScanner.TAG, "Camera is null :(");
}
camera.SetPreviewCallback(this);
} catch (Exception ex) {
ShutdownCamera();
Console.WriteLine("Setup Error: " + ex);
}
PerformanceCounter.Stop(perf, "Camera took {0}ms");
}