/******************************* MAIN FUNCTIONS *******************************/
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
var input = AVCaptureDeviceInput.FromDevice (captureDevice);
CaptureSession = new AVCaptureSession();
CaptureSession.AddInput (input as AVCaptureInput);
var captureMetadataOutput = new AVCaptureMetadataOutput();
metadataDelegate = new MetadataObjectsDelegate();
metadataDelegate.outer = this;
captureMetadataOutput.SetDelegate(metadataDelegate, DispatchQueue.MainQueue);
CaptureSession.AddOutput(captureMetadataOutput);
captureMetadataOutput.MetadataObjectTypes = AVMetadataObjectType.QRCode;
VideoPreviewLayer = new AVCaptureVideoPreviewLayer (CaptureSession);
VideoPreviewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
VideoPreviewLayer.Frame = View.Layer.Bounds;
View.Layer.AddSublayer (VideoPreviewLayer);
View.BringSubviewToFront (messageLabel);
QRCodeFrameView = new UIView ();
QRCodeFrameView.Layer.BorderColor = UIColor.Green.CGColor;
QRCodeFrameView.Layer.BorderWidth = 2;
View.AddSubview (QRCodeFrameView);
View.BringSubviewToFront (QRCodeFrameView);
CaptureSession.StartRunning();
cancelButton.Clicked += (sender, e) => {
this.DismissViewController (true, null);
};
}
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
sessionManager = new SessionManager ();
sessionManager.StartRunning ();
previewLayer = new AVCaptureVideoPreviewLayer (sessionManager.CaptureSession) {
Frame = previewView.Bounds,
VideoGravity = AVLayerVideoGravity.ResizeAspectFill
};
if (previewLayer.Connection != null && previewLayer.Connection.SupportsVideoOrientation)
previewLayer.Connection.VideoOrientation = AVCaptureVideoOrientation.LandscapeLeft;
previewView.Layer.AddSublayer (previewLayer);
previewView.Layer.MasksToBounds = true;
barcodeTargetLayer = new CALayer () {
Frame = View.Layer.Bounds
};
View.Layer.AddSublayer (barcodeTargetLayer);
synth = new Synth ();
synth.LoadPreset (this);
// the loop that continuously looks for barcodes to detect
stepTimer = NSTimer.CreateScheduledTimer (0.15, this, new Selector ("step:"), null, true);
}
bool SetupCaptureSession ()
{
// configure the capture session for low resolution, change this if your code
// can cope with more data or volume
session = new AVCaptureSession () {
SessionPreset = AVCaptureSession.PresetMedium
};
// create a device input and attach it to the session
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
var input = AVCaptureDeviceInput.FromDevice (captureDevice);
if (input == null){
// No input device
return false;
}
session.AddInput (input);
// create a VideoDataOutput and add it to the sesion
var output = new AVCaptureVideoDataOutput () {
VideoSettings = new AVVideoSettings (CVPixelFormatType.CV32BGRA)
};
// configure the output
queue = new DispatchQueue ("myQueue");
qrScanner = new QrScanner (this);
output.SetSampleBufferDelegateAndQueue (qrScanner, queue);
session.AddOutput (output);
previewLayer = new AVCaptureVideoPreviewLayer (session);
previewLayer.Orientation = AVCaptureVideoOrientation.Portrait;
previewLayer.VideoGravity = "AVLayerVideoGravityResizeAspectFill";
session.StartRunning ();
return true;
}
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
sessionManager = new SessionManager ();
sessionManager.StartRunning ();
previewLayer = new AVCaptureVideoPreviewLayer (sessionManager.CaptureSession) {
Frame = previewView.Bounds,
VideoGravity = AVLayerVideoGravity.ResizeAspectFill
};
if (previewLayer.Connection != null && previewLayer.Connection.SupportsVideoOrientation)
previewLayer.Connection.VideoOrientation = AVCaptureVideoOrientation.LandscapeLeft;
previewView.Layer.AddSublayer (previewLayer);
previewView.Layer.MasksToBounds = true;
barcodeTargetLayer = new CALayer () {
Frame = View.Layer.Bounds
};
View.Layer.AddSublayer (barcodeTargetLayer);
synth = new Synth ();
synth.LoadPreset (this);
}
public void SetupLiveCameraStream()
{
captureSession = new AVCaptureSession();
var viewLayer = liveCameraStream.Layer;
Console.WriteLine(viewLayer.Frame.Width);
var videoPreviewLayer = new AVCaptureVideoPreviewLayer(captureSession)
{
Frame = liveCameraStream.Bounds
};
liveCameraStream.Layer.AddSublayer(videoPreviewLayer);
Console.WriteLine(liveCameraStream.Layer.Frame.Width);
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
ConfigureCameraForDevice(captureDevice);
captureDeviceInput = AVCaptureDeviceInput.FromDevice(captureDevice);
var dictionary = new NSMutableDictionary();
dictionary[AVVideo.CodecKey] = new NSNumber((int)AVVideoCodec.JPEG);
stillImageOutput = new AVCaptureStillImageOutput()
{
OutputSettings = new NSDictionary()
};
captureSession.AddOutput(stillImageOutput);
captureSession.AddInput(captureDeviceInput);
captureSession.StartRunning();
ViewWillLayoutSubviews();
}
public void ConfigureCaptureSession (AVCaptureSession captureSession, AVCaptureStillImageOutput captureOutput)
{
if (previewLayer != null) {
previewLayer.RemoveFromSuperLayer ();
previewLayer = null;
}
previewLayer = new AVCaptureVideoPreviewLayer (captureSession) {
VideoGravity = AVPlayerLayer.GravityResizeAspect,
Frame = Bounds
};
Layer.AddSublayer (previewLayer);
CaptureOutput = captureOutput;
CaptureOutput.AddObserver (this, capturingStillImageKeypath, NSKeyValueObservingOptions.New, IntPtr.Zero);
}
public void InitAndStartCamera()
{
session = new AVCaptureSession
{
SessionPreset = AVCaptureSession.PresetMedium
};
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
NSError error;
var videoInput = AVCaptureDeviceInput.FromDevice(captureDevice, out error);
if (videoInput == null || !session.CanAddInput(videoInput)) return;
session.AddInput(videoInput);
previewLayer = new AVCaptureVideoPreviewLayer(session) { Frame = rootView.Bounds };
previewLayer.Connection.VideoOrientation = configDicByRotationChanged[UIApplication.SharedApplication.StatusBarOrientation];
previewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
cameraView.Layer.AddSublayer(previewLayer);
session.StartRunning();
}
void Initialize ()
{
CaptureSession = new AVCaptureSession ();
previewLayer = new AVCaptureVideoPreviewLayer (CaptureSession) {
Frame = Bounds,
VideoGravity = AVLayerVideoGravity.ResizeAspectFill
};
var videoDevices = AVCaptureDevice.DevicesWithMediaType (AVMediaType.Video);
var cameraPosition = (cameraOptions == CameraOptions.Front) ? AVCaptureDevicePosition.Front : AVCaptureDevicePosition.Back;
var device = videoDevices.FirstOrDefault (d => d.Position == cameraPosition);
if (device == null) {
return;
}
NSError error;
var input = new AVCaptureDeviceInput (device, out error);
CaptureSession.AddInput (input);
Layer.AddSublayer (previewLayer);
CaptureSession.StartRunning ();
IsPreviewing = true;
}
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
session = new AVCaptureSession ();
var camera = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
var input = AVCaptureDeviceInput.FromDevice(camera);
session.AddInput(input);
output = new AVCaptureMetadataOutput();
var metadataDelegate = new MetadataOutputDelegate();
output.SetDelegate(metadataDelegate, DispatchQueue.MainQueue);
session.AddOutput(output);
output.MetadataObjectTypes = new NSString[] {
AVMetadataObject.TypeQRCode,
AVMetadataObject.TypeEAN13Code
};
var previewLayer = new AVCaptureVideoPreviewLayer(session);
//var view = new ContentView(UIColor.LightGray, previewLayer, metadataDelegate);
previewLayer.MasksToBounds = true;
previewLayer.VideoGravity = AVCaptureVideoPreviewLayer.GravityResizeAspectFill;
previewLayer.Frame = UIScreen.MainScreen.Bounds;
this.View.Layer.AddSublayer(previewLayer);
metadataDelegate.MetadataFound += (s, e) => {
session.StopRunning();
new UIAlertView("Scanned!",e.StringValue, null ,"OK",null).Show();
};
session.StartRunning();
}
void Initialize(bool defaultTorchOn, bool vibrationOnDetected, bool startScanningOnCreate, int scanInterval)
{
Configuration.IsScanning = startScanningOnCreate;
CaptureSession = new AVCaptureSession();
CaptureSession.BeginConfiguration();
this.AutoresizingMask = UIViewAutoresizing.FlexibleDimensions;
previewLayer = new AVCaptureVideoPreviewLayer(CaptureSession)
{
Frame = this.Bounds,
VideoGravity = AVLayerVideoGravity.ResizeAspectFill
};
var videoDevices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
var cameraPosition = AVCaptureDevicePosition.Back;
//var cameraPosition = (cameraOptions == CameraOptions.Front) ? AVCaptureDevicePosition.Front : AVCaptureDevicePosition.Back;
var device = videoDevices.FirstOrDefault(d => d.Position == cameraPosition);
if (device == null)
{
return;
}
NSError error;
var input = new AVCaptureDeviceInput(device, out error);
CaptureSession.AddInput(input);
CaptureSession.SessionPreset = AVFoundation.AVCaptureSession.Preset1280x720;
Layer.AddSublayer(previewLayer);
CaptureSession.CommitConfiguration();
VideoDataOutput = new AVCaptureVideoDataOutput
{
AlwaysDiscardsLateVideoFrames = true,
WeakVideoSettings = new CVPixelBufferAttributes {
PixelFormatType = CVPixelFormatType.CV32BGRA
}
.Dictionary
};
captureVideoDelegate = new CaptureVideoDelegate(vibrationOnDetected, scanInterval);
captureVideoDelegate.OnDetected += (list) =>
{
InvokeOnMainThread(() => {
//CaptureSession.StopRunning();
this.OnDetected?.Invoke(list);
});
};
VideoDataOutput.SetSampleBufferDelegateQueue(captureVideoDelegate, CoreFoundation.DispatchQueue.MainQueue);
CaptureSession.AddOutput(VideoDataOutput);
InvokeOnMainThread(() =>
{
CaptureSession.StartRunning();
//Torch on by default
if (defaultTorchOn && !GoogleVisionBarCodeScanner.Methods.IsTorchOn())
{
GoogleVisionBarCodeScanner.Methods.ToggleFlashlight();
}
});
}
private void SetupCamera()
{
CaptureSession = null;
CaptureSession = new AVCaptureSession();
CaptureSession.SessionPreset = AVCaptureSession.PresetPhoto;
currentDevice = null;
inputDevice1 = null;
inputDevice2 = null;
foreach (AVCaptureDevice device in AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video))
{
if (device.Position == AVCaptureDevicePosition.Front)
{
inputDevice1 = device;
}
else if (device.Position == AVCaptureDevicePosition.Back)
{
inputDevice2 = device;
}
}
NSError error;
if (inputDevice1.HasFlash)
{
inputDevice1.LockForConfiguration(out error);
inputDevice1.FlashMode = AVCaptureFlashMode.Off;
FlashButton.TitleLabel.Text = "Flash Off";
}
if (inputDevice2.HasFlash)
{
inputDevice2.LockForConfiguration(out error);
inputDevice2.FlashMode = AVCaptureFlashMode.Off;
FlashButton.TitleLabel.Text = "Flash Off";
}
frontCamera = AVCaptureDeviceInput.FromDevice(inputDevice1, out error);
rearCamera = AVCaptureDeviceInput.FromDevice(inputDevice2, out error);
currentDevice = inputDevice2;
if (CaptureSession.CanAddInput(rearCamera))
{
CaptureSession.AddInput(rearCamera);
}
AVCaptureVideoPreviewLayer previewLayer = new AVCaptureVideoPreviewLayer(CaptureSession);
previewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
previewLayer.Frame = View.Frame;
View.Layer.InsertSublayer(previewLayer, 0);
StillImageOutput = new AVCaptureStillImageOutput();
StillImageOutput.OutputSettings = new NSDictionary(AVVideo.CodecKey, AVVideo.CodecJPEG);
CaptureSession.AddOutput(StillImageOutput);
CaptureSession.StartRunning();
}
bool SetupCaptureSession()
{
// configure the capture session for low resolution, change this if your code
// can cope with more data or volume
session = new AVCaptureSession()
{
SessionPreset = AVCaptureSession.Preset640x480
};
// create a device input and attach it to the session
// var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
AVCaptureDevice captureDevice = null;
var devices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
foreach (var device in devices)
{
captureDevice = device;
if (options.UseFrontCameraIfAvailable.HasValue &&
options.UseFrontCameraIfAvailable.Value &&
device.Position == AVCaptureDevicePosition.Front)
{
break; //Front camera successfully set
}
else if (device.Position == AVCaptureDevicePosition.Back && (!options.UseFrontCameraIfAvailable.HasValue || !options.UseFrontCameraIfAvailable.Value))
{
break; //Back camera succesfully set
}
}
if (captureDevice == null)
{
Console.WriteLine("No captureDevice - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
}
return(false);
}
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
Console.WriteLine("No input - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
}
return(false);
}
else
{
session.AddInput(input);
}
foundResult = false;
//Detect barcodes with built in avcapture stuff
AVCaptureMetadataOutput metadataOutput = new AVCaptureMetadataOutput();
var dg = new CaptureDelegate(metaDataObjects =>
{
if (foundResult)
{
return;
}
//Console.WriteLine("Found MetaData Objects");
var mdo = metaDataObjects.FirstOrDefault();
if (mdo == null)
{
return;
}
var readableObj = mdo as AVMetadataMachineReadableCodeObject;
if (readableObj == null)
{
return;
}
foundResult = true;
//Console.WriteLine("Barcode: " + readableObj.StringValue);
var zxingFormat = ZXingBarcodeFormatFromAVCaptureBarcodeFormat(readableObj.Type.ToString());
var rs = new ZXing.Result(readableObj.StringValue, null, null, zxingFormat);
resultCallback(rs);
});
metadataOutput.SetDelegate(dg, DispatchQueue.MainQueue);
session.AddOutput(metadataOutput);
//Setup barcode formats
if (ScanningOptions.PossibleFormats != null && ScanningOptions.PossibleFormats.Count > 0)
{
var formats = AVMetadataObjectType.None;
foreach (var f in ScanningOptions.PossibleFormats)
{
formats |= AVCaptureBarcodeFormatFromZXingBarcodeFormat(f);
}
formats &= ~AVMetadataObjectType.None;
metadataOutput.MetadataObjectTypes = formats;
}
else
{
metadataOutput.MetadataObjectTypes = metadataOutput.AvailableMetadataObjectTypes;
}
previewLayer = new AVCaptureVideoPreviewLayer(session);
//Framerate set here (15 fps)
if (previewLayer.RespondsToSelector(new Selector("connection")))
{
if (UIDevice.CurrentDevice.CheckSystemVersion(7, 0))
{
var perf1 = PerformanceCounter.Start();
NSError lockForConfigErr = null;
captureDevice.LockForConfiguration(out lockForConfigErr);
if (lockForConfigErr == null)
{
captureDevice.ActiveVideoMinFrameDuration = new CMTime(1, 10);
captureDevice.UnlockForConfiguration();
}
PerformanceCounter.Stop(perf1, "PERF: ActiveVideoMinFrameDuration Took {0} ms");
}
else
{
previewLayer.Connection.VideoMinFrameDuration = new CMTime(1, 10);
}
}
#if __UNIFIED__
previewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
#else
previewLayer.LayerVideoGravity = AVLayerVideoGravity.ResizeAspectFill;
#endif
previewLayer.Frame = new CGRect(0, 0, this.Frame.Width, this.Frame.Height);
previewLayer.Position = new CGPoint(this.Layer.Bounds.Width / 2, (this.Layer.Bounds.Height / 2));
layerView = new UIView(new CGRect(0, 0, this.Frame.Width, this.Frame.Height));
layerView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
layerView.Layer.AddSublayer(previewLayer);
this.AddSubview(layerView);
ResizePreview(UIApplication.SharedApplication.StatusBarOrientation);
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
//overlayView.LayoutSubviews ();
}
session.StartRunning();
Console.WriteLine("RUNNING!!!");
//output.AlwaysDiscardsLateVideoFrames = true;
Console.WriteLine("SetupCamera Finished");
//session.AddOutput (output);
//session.StartRunning ();
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ContinuousAutoFocus))
{
NSError err = null;
if (captureDevice.LockForConfiguration(out err))
{
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ContinuousAutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.ContinuousAutoFocus;
}
else if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.AutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.AutoFocus;
}
if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.ContinuousAutoExposure))
{
captureDevice.ExposureMode = AVCaptureExposureMode.ContinuousAutoExposure;
}
else if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.AutoExpose))
{
captureDevice.ExposureMode = AVCaptureExposureMode.AutoExpose;
}
if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance;
}
else if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.AutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.AutoWhiteBalance;
}
if (UIDevice.CurrentDevice.CheckSystemVersion(7, 0) && captureDevice.AutoFocusRangeRestrictionSupported)
{
captureDevice.AutoFocusRangeRestriction = AVCaptureAutoFocusRangeRestriction.Near;
}
if (captureDevice.FocusPointOfInterestSupported)
{
captureDevice.FocusPointOfInterest = new CGPoint(0.5f, 0.5f);
}
if (captureDevice.ExposurePointOfInterestSupported)
{
captureDevice.ExposurePointOfInterest = new CGPoint(0.5f, 0.5f);
}
captureDevice.UnlockForConfiguration();
}
else
{
Console.WriteLine("Failed to Lock for Config: " + err.Description);
}
}
return(true);
}
bool SetupCaptureSession()
{
var started = DateTime.UtcNow;
var availableResolutions = new List <CameraResolution> ();
var consideredResolutions = new Dictionary <NSString, CameraResolution> {
{ AVCaptureSession.Preset352x288, new CameraResolution {
Width = 352, Height = 288
} },
{ AVCaptureSession.PresetMedium, new CameraResolution {
Width = 480, Height = 360
} }, //480x360
{ AVCaptureSession.Preset640x480, new CameraResolution {
Width = 640, Height = 480
} },
{ AVCaptureSession.Preset1280x720, new CameraResolution {
Width = 1280, Height = 720
} },
{ AVCaptureSession.Preset1920x1080, new CameraResolution {
Width = 1920, Height = 1080
} }
};
// configure the capture session for low resolution, change this if your code
// can cope with more data or volume
session = new AVCaptureSession()
{
SessionPreset = AVCaptureSession.Preset640x480
};
// create a device input and attach it to the session
// var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
AVCaptureDevice captureDevice = null;
var devices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
foreach (var device in devices)
{
captureDevice = device;
if (options.UseFrontCameraIfAvailable.HasValue &&
options.UseFrontCameraIfAvailable.Value &&
device.Position == AVCaptureDevicePosition.Front)
{
break; //Front camera successfully set
}
else if (device.Position == AVCaptureDevicePosition.Back && (!options.UseFrontCameraIfAvailable.HasValue || !options.UseFrontCameraIfAvailable.Value))
{
break; //Back camera succesfully set
}
}
if (captureDevice == null)
{
Console.WriteLine("No captureDevice - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
}
return(false);
}
CameraResolution resolution = null;
// Find resolution
// Go through the resolutions we can even consider
foreach (var cr in consideredResolutions)
{
// Now check to make sure our selected device supports the resolution
// so we can add it to the list to pick from
if (captureDevice.SupportsAVCaptureSessionPreset(cr.Key))
{
availableResolutions.Add(cr.Value);
}
}
resolution = options.GetResolution(availableResolutions);
// See if the user selected a resolution
if (resolution != null)
{
// Now get the preset string from the resolution chosen
var preset = (from c in consideredResolutions
where c.Value.Width == resolution.Width &&
c.Value.Height == resolution.Height
select c.Key).FirstOrDefault();
// If we found a matching preset, let's set it on the session
if (!string.IsNullOrEmpty(preset))
{
session.SessionPreset = preset;
}
}
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
Console.WriteLine("No input - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
}
return(false);
}
else
{
session.AddInput(input);
}
var startedAVPreviewLayerAlloc = DateTime.UtcNow;
previewLayer = new AVCaptureVideoPreviewLayer(session);
var totalAVPreviewLayerAlloc = DateTime.UtcNow - startedAVPreviewLayerAlloc;
Console.WriteLine("PERF: Alloc AVCaptureVideoPreviewLayer took {0} ms.", totalAVPreviewLayerAlloc.TotalMilliseconds);
//Framerate set here (15 fps)
if (UIDevice.CurrentDevice.CheckSystemVersion(7, 0))
{
var perf1 = PerformanceCounter.Start();
NSError lockForConfigErr = null;
captureDevice.LockForConfiguration(out lockForConfigErr);
if (lockForConfigErr == null)
{
captureDevice.ActiveVideoMinFrameDuration = new CMTime(1, 10);
captureDevice.UnlockForConfiguration();
}
PerformanceCounter.Stop(perf1, "PERF: ActiveVideoMinFrameDuration Took {0} ms");
}
else
{
previewLayer.Connection.VideoMinFrameDuration = new CMTime(1, 10);
}
var perf2 = PerformanceCounter.Start();
#if __UNIFIED__
previewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
#else
previewLayer.LayerVideoGravity = AVLayerVideoGravity.ResizeAspectFill;
#endif
previewLayer.Frame = new CGRect(0, 0, this.Frame.Width, this.Frame.Height);
previewLayer.Position = new CGPoint(this.Layer.Bounds.Width / 2, (this.Layer.Bounds.Height / 2));
layerView = new UIView(new CGRect(0, 0, this.Frame.Width, this.Frame.Height));
layerView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
layerView.Layer.AddSublayer(previewLayer);
this.AddSubview(layerView);
ResizePreview(UIApplication.SharedApplication.StatusBarOrientation);
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
//overlayView.LayoutSubviews ();
}
PerformanceCounter.Stop(perf2, "PERF: Setting up layers took {0} ms");
var perf3 = PerformanceCounter.Start();
session.StartRunning();
PerformanceCounter.Stop(perf3, "PERF: session.StartRunning() took {0} ms");
var perf4 = PerformanceCounter.Start();
var videoSettings = NSDictionary.FromObjectAndKey(new NSNumber((int)CVPixelFormatType.CV32BGRA),
CVPixelBuffer.PixelFormatTypeKey);
// create a VideoDataOutput and add it to the sesion
output = new AVCaptureVideoDataOutput {
WeakVideoSettings = videoSettings
};
// configure the output
queue = new DispatchQueue("ZxingScannerView"); // (Guid.NewGuid().ToString());
var barcodeReader = new BarcodeReader(null, (img) =>
{
var src = new RGBLuminanceSource(img); //, bmp.Width, bmp.Height);
//Don't try and rotate properly if we're autorotating anyway
if (ScanningOptions.AutoRotate.HasValue && ScanningOptions.AutoRotate.Value)
{
return(src);
}
var tmpInterfaceOrientation = UIInterfaceOrientation.Portrait;
InvokeOnMainThread(() => tmpInterfaceOrientation = UIApplication.SharedApplication.StatusBarOrientation);
switch (tmpInterfaceOrientation)
{
case UIInterfaceOrientation.Portrait:
return(src.rotateCounterClockwise().rotateCounterClockwise().rotateCounterClockwise());
case UIInterfaceOrientation.PortraitUpsideDown:
return(src.rotateCounterClockwise().rotateCounterClockwise().rotateCounterClockwise());
case UIInterfaceOrientation.LandscapeLeft:
return(src);
case UIInterfaceOrientation.LandscapeRight:
return(src);
}
return(src);
}, null, null); //(p, w, h, f) => new RGBLuminanceSource(p, w, h, RGBLuminanceSource.BitmapFormat.Unknown));
if (ScanningOptions.TryHarder.HasValue)
{
Console.WriteLine("TRY_HARDER: " + ScanningOptions.TryHarder.Value);
barcodeReader.Options.TryHarder = ScanningOptions.TryHarder.Value;
}
if (ScanningOptions.PureBarcode.HasValue)
{
barcodeReader.Options.PureBarcode = ScanningOptions.PureBarcode.Value;
}
if (ScanningOptions.AutoRotate.HasValue)
{
Console.WriteLine("AUTO_ROTATE: " + ScanningOptions.AutoRotate.Value);
barcodeReader.AutoRotate = ScanningOptions.AutoRotate.Value;
}
if (!string.IsNullOrEmpty(ScanningOptions.CharacterSet))
{
barcodeReader.Options.CharacterSet = ScanningOptions.CharacterSet;
}
if (ScanningOptions.TryInverted.HasValue)
{
barcodeReader.TryInverted = ScanningOptions.TryInverted.Value;
}
if (ScanningOptions.PossibleFormats != null && ScanningOptions.PossibleFormats.Count > 0)
{
barcodeReader.Options.PossibleFormats = new List <BarcodeFormat>();
foreach (var pf in ScanningOptions.PossibleFormats)
{
barcodeReader.Options.PossibleFormats.Add(pf);
}
}
outputRecorder = new OutputRecorder(ScanningOptions, img =>
{
if (!IsAnalyzing)
{
return;
}
try
{
//var sw = new System.Diagnostics.Stopwatch();
//sw.Start();
var rs = barcodeReader.Decode(img);
//sw.Stop();
//Console.WriteLine("Decode Time: {0} ms", sw.ElapsedMilliseconds);
if (rs != null)
{
resultCallback(rs);
}
}
catch (Exception ex)
{
Console.WriteLine("DECODE FAILED: " + ex);
}
});
output.AlwaysDiscardsLateVideoFrames = true;
output.SetSampleBufferDelegate(outputRecorder, queue);
PerformanceCounter.Stop(perf4, "PERF: SetupCamera Finished. Took {0} ms.");
session.AddOutput(output);
//session.StartRunning ();
var perf5 = PerformanceCounter.Start();
NSError err = null;
if (captureDevice.LockForConfiguration(out err))
{
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ContinuousAutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.ContinuousAutoFocus;
}
else if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.AutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.AutoFocus;
}
if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.ContinuousAutoExposure))
{
captureDevice.ExposureMode = AVCaptureExposureMode.ContinuousAutoExposure;
}
else if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.AutoExpose))
{
captureDevice.ExposureMode = AVCaptureExposureMode.AutoExpose;
}
if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance;
}
else if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.AutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.AutoWhiteBalance;
}
if (UIDevice.CurrentDevice.CheckSystemVersion(7, 0) && captureDevice.AutoFocusRangeRestrictionSupported)
{
captureDevice.AutoFocusRangeRestriction = AVCaptureAutoFocusRangeRestriction.Near;
}
if (captureDevice.FocusPointOfInterestSupported)
{
captureDevice.FocusPointOfInterest = new PointF(0.5f, 0.5f);
}
if (captureDevice.ExposurePointOfInterestSupported)
{
captureDevice.ExposurePointOfInterest = new PointF(0.5f, 0.5f);
}
captureDevice.UnlockForConfiguration();
}
else
{
Console.WriteLine("Failed to Lock for Config: " + err.Description);
}
PerformanceCounter.Stop(perf5, "PERF: Setup Focus in {0} ms.");
return(true);
}
private bool SetupCaptureSession()
{
if (CameraPreviewSettings.Instance.Decoder == null)
{
return(false);
}
var started = DateTime.UtcNow;
var availableResolutions = new List <CameraResolution>();
var consideredResolutions = new Dictionary <NSString, CameraResolution>
{
{ AVCaptureSession.Preset352x288, new CameraResolution {
Width = 352, Height = 288
} },
{ AVCaptureSession.PresetMedium, new CameraResolution {
Width = 480, Height = 360
} }, //480x360
{ AVCaptureSession.Preset640x480, new CameraResolution {
Width = 640, Height = 480
} },
{ AVCaptureSession.Preset1280x720, new CameraResolution {
Width = 1280, Height = 720
} },
{ AVCaptureSession.Preset1920x1080, new CameraResolution {
Width = 1920, Height = 1080
} }
};
// configure the capture session for low resolution, change this if your code
// can cope with more data or volume
_session = new AVCaptureSession()
{
SessionPreset = AVCaptureSession.Preset640x480
};
// create a device input and attach it to the session
// var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
AVCaptureDevice captureDevice = null;
var devices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
foreach (var device in devices)
{
captureDevice = device;
if (CameraPreviewSettings.Instance.ScannerOptions.UseFrontCameraIfAvailable.HasValue &&
CameraPreviewSettings.Instance.ScannerOptions.UseFrontCameraIfAvailable.Value &&
device.Position == AVCaptureDevicePosition.Front)
{
break; //Front camera successfully set
}
else if (device.Position == AVCaptureDevicePosition.Back &&
(!CameraPreviewSettings.Instance.ScannerOptions.UseFrontCameraIfAvailable.HasValue ||
!CameraPreviewSettings.Instance.ScannerOptions.UseFrontCameraIfAvailable.Value))
{
break; //Back camera successfully set
}
}
if (captureDevice == null)
{
Console.WriteLine("No captureDevice - this won't work on the simulator, try a physical device");
return(false);
}
CameraResolution resolution = null;
// Find resolution
// Go through the resolutions we can even consider
foreach (var cr in consideredResolutions)
{
// Now check to make sure our selected device supports the resolution
// so we can add it to the list to pick from
if (captureDevice.SupportsAVCaptureSessionPreset(cr.Key))
{
availableResolutions.Add(cr.Value);
}
}
resolution = CameraPreviewSettings.Instance.ScannerOptions.GetResolution(availableResolutions);
// See if the user selected a resolution
if (resolution != null)
{
// Now get the preset string from the resolution chosen
var preset = (from c in consideredResolutions
where c.Value.Width == resolution.Width &&
c.Value.Height == resolution.Height
select c.Key).FirstOrDefault();
// If we found a matching preset, let's set it on the session
if (!string.IsNullOrEmpty(preset))
{
_session.SessionPreset = preset;
}
}
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
Console.WriteLine("No input - this won't work on the simulator, try a physical device");
return(false);
}
else
{
_session.AddInput(input);
}
var startedAvPreviewLayerAlloc = PerformanceCounter.Start();
_previewLayer = new AVCaptureVideoPreviewLayer(_session);
PerformanceCounter.Stop(startedAvPreviewLayerAlloc, "Alloc AVCaptureVideoPreviewLayer took {0} ms.");
var perf2 = PerformanceCounter.Start();
#if __UNIFIED__
_previewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
#else
previewLayer.LayerVideoGravity = AVLayerVideoGravity.ResizeAspectFill;
#endif
_previewLayer.Frame = new CGRect(0, 0, this.Frame.Width, this.Frame.Height);
_previewLayer.Position = new CGPoint(this.Layer.Bounds.Width / 2, (this.Layer.Bounds.Height / 2));
_layerView = new UIView(new CGRect(0, 0, this.Frame.Width, this.Frame.Height))
{
AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight
};
_layerView.Layer.AddSublayer(_previewLayer);
this.AddSubview(_layerView);
ResizePreview(UIApplication.SharedApplication.StatusBarOrientation);
PerformanceCounter.Stop(perf2, "PERF: Setting up layers took {0} ms");
var perf3 = PerformanceCounter.Start();
_session.StartRunning();
PerformanceCounter.Stop(perf3, "PERF: session.StartRunning() took {0} ms");
var perf4 = PerformanceCounter.Start();
var videoSettings = NSDictionary.FromObjectAndKey(new NSNumber((int)CVPixelFormatType.CV32BGRA),
CVPixelBuffer.PixelFormatTypeKey);
// create a VideoDataOutput and add it to the sesion
_output = new AVCaptureVideoDataOutput
{
WeakVideoSettings = videoSettings
};
// configure the output
_queue = new DispatchQueue("CamerPreviewView"); // (Guid.NewGuid().ToString());
_outputRecorder = new DefaultOutputRecorder(_resultCallback);
_output.AlwaysDiscardsLateVideoFrames = true;
_output.SetSampleBufferDelegateQueue(_outputRecorder, _queue);
PerformanceCounter.Stop(perf4, "PERF: SetupCamera Finished. Took {0} ms.");
_session.AddOutput(_output);
//session.StartRunning ();
var perf5 = PerformanceCounter.Start();
if (captureDevice.LockForConfiguration(out var err))
{
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ContinuousAutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.ContinuousAutoFocus;
}
else if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.AutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.AutoFocus;
}
if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.ContinuousAutoExposure))
{
captureDevice.ExposureMode = AVCaptureExposureMode.ContinuousAutoExposure;
}
else if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.AutoExpose))
{
captureDevice.ExposureMode = AVCaptureExposureMode.AutoExpose;
}
if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance;
}
else if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.AutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.AutoWhiteBalance;
}
if (UIDevice.CurrentDevice.CheckSystemVersion(7, 0) && captureDevice.AutoFocusRangeRestrictionSupported)
{
captureDevice.AutoFocusRangeRestriction = AVCaptureAutoFocusRangeRestriction.Near;
}
if (captureDevice.FocusPointOfInterestSupported)
{
captureDevice.FocusPointOfInterest = new PointF(0.5f, 0.5f);
}
if (captureDevice.ExposurePointOfInterestSupported)
{
captureDevice.ExposurePointOfInterest = new PointF(0.5f, 0.5f);
}
captureDevice.UnlockForConfiguration();
}
else
{
Logger.Log("Failed to Lock for Config: " + err.Description);
}
PerformanceCounter.Stop(perf5, "PERF: Setup Focus in {0} ms.");
return(true);
}
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
this.View.BackgroundColor = UIColor.White;
NSError error;
// Setup detector options.
var options = new CIDetectorOptions {
Accuracy = FaceDetectorAccuracy.High,
// Can give a hint here about the rects to detect. 1.4 would be for A4 sheets of paper for instance.
AspectRatio = 1.41f,
};
// Create a rectangle detector. Note that you can also create QR detector or a face detector.
// Most of this code will also work with other detectors (like streaming to a preview layer and grabbing images).
this.detector = CIDetector.CreateRectangleDetector (context: null, detectorOptions: options);
// Create the session. The AVCaptureSession is the managing instance of the whole video handling.
var captureSession = new AVCaptureSession ()
{
// Defines what quality we want to use for the images we grab. Photo gives highest resolutions.
SessionPreset = AVCaptureSession.PresetPhoto
};
// Find a suitable AVCaptureDevice for video input.
var device = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
if (device == null)
{
// This will not work on the iOS Simulator - there is no camera. :-)
throw new InvalidProgramException ("Failed to get AVCaptureDevice for video input!");
}
// Create a device input with the device and add it to the session.
var videoInput = AVCaptureDeviceInput.FromDevice (device, out error);
if (videoInput == null)
{
throw new InvalidProgramException ("Failed to get AVCaptureDeviceInput from AVCaptureDevice!");
}
// Let session read from the input, this is our source.
captureSession.AddInput (videoInput);
// Create output for the video stream. This is the destination.
var videoOutput = new AVCaptureVideoDataOutput () {
AlwaysDiscardsLateVideoFrames = true
};
// Define the video format we want to use. Note that Xamarin exposes the CompressedVideoSetting and UncompressedVideoSetting
// properties on AVCaptureVideoDataOutput un Unified API, but I could not get these to work. The VideoSettings property is deprecated,
// so I use the WeakVideoSettings instead which takes an NSDictionary as input.
this.videoSettingsDict = new NSMutableDictionary ();
this.videoSettingsDict.Add (CVPixelBuffer.PixelFormatTypeKey, NSNumber.FromUInt32((uint)CVPixelFormatType.CV32BGRA));
videoOutput.WeakVideoSettings = this.videoSettingsDict;
// Create a delegate to report back to us when an image has been captured.
// We want to grab the camera stream and feed it through a AVCaptureVideoDataOutputSampleBufferDelegate
// which allows us to get notified if a new image is availeble. An implementation of that delegate is VideoFrameSampleDelegate in this project.
this.sampleBufferDelegate = new VideoFrameSamplerDelegate ();
// Processing happens via Grand Central Dispatch (GCD), so we need to provide a queue.
// This is pretty much like a system managed thread (see: http://zeroheroblog.com/ios/concurrency-in-ios-grand-central-dispatch-gcd-dispatch-queues).
this.sessionQueue = new DispatchQueue ("AVSessionQueue");
// Assign the queue and the delegate to the output. Now all output will go through the delegate.
videoOutput.SetSampleBufferDelegate(this.sampleBufferDelegate, this.sessionQueue);
// Add output to session.
captureSession.AddOutput(videoOutput);
// We also want to visualize the input stream. The raw stream can be fed into an AVCaptureVideoPreviewLayer, which is a subclass of CALayer.
// A CALayer can be added to a UIView. We add that layer to the controller's main view.
var layer = this.View.Layer;
this.videoLayer = AVCaptureVideoPreviewLayer.FromSession (captureSession);
this.videoLayer.Frame = layer.Bounds;
layer.AddSublayer (this.videoLayer);
// All setup! Start capturing!
captureSession.StartRunning ();
// This is just for information and allows you to get valid values for the detection framerate.
Console.WriteLine ("Available capture framerates:");
var rateRanges = device.ActiveFormat.VideoSupportedFrameRateRanges;
foreach (var r in rateRanges)
{
Console.WriteLine (r.MinFrameRate + "; " + r.MaxFrameRate + "; " + r.MinFrameDuration + "; " + r.MaxFrameDuration);
}
// Configure framerate. Kind of weird way of doing it but the only one that works.
device.LockForConfiguration (out error);
// CMTime constructor means: 1 = one second, DETECTION_FPS = how many samples per unit, which is 1 second in this case.
device.ActiveVideoMinFrameDuration = new CMTime(1, DETECTION_FPS);
device.ActiveVideoMaxFrameDuration = new CMTime(1, DETECTION_FPS);
device.UnlockForConfiguration ();
// Put a small image view at the top left that shows the live image with the detected rectangle(s).
this.imageViewOverlay = new UIImageView
{
ContentMode = UIViewContentMode.ScaleAspectFit,
BackgroundColor = UIColor.Gray
};
this.imageViewOverlay.Layer.BorderColor = UIColor.Red.CGColor;
this.imageViewOverlay.Layer.BorderWidth = 3f;
this.Add (this.imageViewOverlay);
// Put another image view top right that shows the image with perspective correction.
this.imageViewPerspective = new UIImageView
{
ContentMode = UIViewContentMode.ScaleAspectFit,
BackgroundColor = UIColor.Gray
};
this.imageViewPerspective.Layer.BorderColor = UIColor.Red.CGColor;
this.imageViewPerspective.Layer.BorderWidth = 3f;
this.Add (this.imageViewPerspective);
// Add some lables for information.
this.mainWindowLbl = new UILabel
{
Text = "Live stream from camera. Point camera to a rectangular object.",
TextAlignment = UITextAlignment.Center
};
this.Add (this.mainWindowLbl);
this.detectionWindowLbl = new UILabel
{
Text = "Detected rectangle overlay",
TextAlignment = UITextAlignment.Center
};
this.Add (this.detectionWindowLbl);
this.perspectiveWindowLbl = new UILabel
{
Text = "Perspective corrected",
TextAlignment = UITextAlignment.Center
};
this.Add (this.perspectiveWindowLbl);
}
public UiCameraPreview(CameraPreview camera)
{
this._CameraOptions = camera.Camera;
this._IsPreviewing = camera.IsPreviewing;
this._Camera = camera;
this.CaptureSession = new AVCaptureSession();
this._PreviewLayer = new AVCaptureVideoPreviewLayer(this.CaptureSession)
{
Frame = this.Bounds,
VideoGravity = AVLayerVideoGravity.ResizeAspectFill
};
this.Layer.AddSublayer(this._PreviewLayer);
this.Initialize();
MessagingCenter.Subscribe <LifeCyclePayload>(this, "", (p) =>
{
switch (p.Status)
{
case LifeCycle.OnSleep:
//Sleep状態になるときにリソース解放
this.Release();
break;
case LifeCycle.OnResume:
//Resume状態になるときに初期化
this.Initialize();
break;
}
});
// Adjust size and orientation of preview image
this._Notification = UIApplication.Notifications.ObserveDidChangeStatusBarOrientation((sender, args) =>
{
switch (UIApplication.SharedApplication.StatusBarOrientation)
{
case UIInterfaceOrientation.Portrait:
this._PreviewLayer.Connection.VideoOrientation = AVCaptureVideoOrientation.Portrait;
break;
case UIInterfaceOrientation.PortraitUpsideDown:
this._PreviewLayer.Connection.VideoOrientation = AVCaptureVideoOrientation.PortraitUpsideDown;
break;
case UIInterfaceOrientation.LandscapeLeft:
this._PreviewLayer.Connection.VideoOrientation = AVCaptureVideoOrientation.LandscapeLeft;
break;
case UIInterfaceOrientation.LandscapeRight:
this._PreviewLayer.Connection.VideoOrientation = AVCaptureVideoOrientation.LandscapeRight;
break;
default:
break;
}
});
this._Camera.SizeChanged += (sender, args) =>
{
var rect = this._Camera.Bounds;
this._PreviewLayer.Frame = new CGRect(new CGPoint(rect.X, rect.Y), new CGSize(rect.Width, rect.Height));
};
}
bool SetupCaptureSession()
{
var availableResolutions = new List <CameraResolution>();
var consideredResolutions = new Dictionary <NSString, CameraResolution> {
{ AVCaptureSession.Preset352x288, new CameraResolution {
Width = 352, Height = 288
} },
{ AVCaptureSession.PresetMedium, new CameraResolution {
Width = 480, Height = 360
} }, //480x360
{ AVCaptureSession.Preset640x480, new CameraResolution {
Width = 640, Height = 480
} },
{ AVCaptureSession.Preset1280x720, new CameraResolution {
Width = 1280, Height = 720
} },
{ AVCaptureSession.Preset1920x1080, new CameraResolution {
Width = 1920, Height = 1080
} }
};
// configure the capture session for low resolution, change this if your code
// can cope with more data or volume
session = new AVCaptureSession()
{
SessionPreset = AVCaptureSession.Preset640x480
};
// create a device input and attach it to the session
// var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
AVCaptureDevice captureDevice = null;
var devices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
foreach (var device in devices)
{
captureDevice = device;
if (ScanningOptions.UseFrontCameraIfAvailable.HasValue &&
ScanningOptions.UseFrontCameraIfAvailable.Value &&
device.Position == AVCaptureDevicePosition.Front)
{
break; //Front camera successfully set
}
else if (device.Position == AVCaptureDevicePosition.Back && (!ScanningOptions.UseFrontCameraIfAvailable.HasValue || !ScanningOptions.UseFrontCameraIfAvailable.Value))
{
break; //Back camera succesfully set
}
}
if (captureDevice == null)
{
Console.WriteLine("No captureDevice - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
AddSubview(overlayView);
BringSubviewToFront(overlayView);
}
return(false);
}
CameraResolution resolution = null;
// Find resolution
// Go through the resolutions we can even consider
foreach (var cr in consideredResolutions)
{
// Now check to make sure our selected device supports the resolution
// so we can add it to the list to pick from
if (captureDevice.SupportsAVCaptureSessionPreset(cr.Key))
{
availableResolutions.Add(cr.Value);
}
}
resolution = ScanningOptions.GetResolution(availableResolutions);
// See if the user selected a resolution
if (resolution != null)
{
// Now get the preset string from the resolution chosen
var preset = (from c in consideredResolutions
where c.Value.Width == resolution.Width &&
c.Value.Height == resolution.Height
select c.Key).FirstOrDefault();
// If we found a matching preset, let's set it on the session
if (!string.IsNullOrEmpty(preset))
{
session.SessionPreset = preset;
}
}
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
Console.WriteLine("No input - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
AddSubview(overlayView);
BringSubviewToFront(overlayView);
}
return(false);
}
else
{
session.AddInput(input);
}
foundResult = false;
//Detect barcodes with built in avcapture stuff
var metadataOutput = new AVCaptureMetadataOutput();
captureDelegate = new CaptureDelegate(metaDataObjects =>
{
if (!analyzing)
{
return;
}
var msSinceLastPreview = (DateTime.UtcNow - lastAnalysis).TotalMilliseconds;
if (msSinceLastPreview < ScanningOptions.DelayBetweenAnalyzingFrames ||
(wasScanned && msSinceLastPreview < ScanningOptions.DelayBetweenContinuousScans) ||
working)
{
return;
}
try
{
working = true;
wasScanned = false;
lastAnalysis = DateTime.UtcNow;
var mdo = metaDataObjects.FirstOrDefault();
if (!(mdo is AVMetadataMachineReadableCodeObject readableObj))
{
return;
}
if (readableObj.Type == AVMetadataObjectType.CatBody ||
readableObj.Type == AVMetadataObjectType.DogBody ||
readableObj.Type == AVMetadataObjectType.Face ||
readableObj.Type == AVMetadataObjectType.HumanBody ||
readableObj.Type == AVMetadataObjectType.SalientObject)
{
return;
}
wasScanned = true;
var zxingFormat = ZXingBarcodeFormatFromAVCaptureBarcodeFormat(readableObj.Type.ToString());
var rs = new ZXing.Result(readableObj.StringValue, null, null, zxingFormat);
resultCallback(rs);
}
finally
{
working = false;
}
});
metadataOutput.SetDelegate(captureDelegate, DispatchQueue.MainQueue);
session.AddOutput(metadataOutput);
//Setup barcode formats
if (ScanningOptions?.PossibleFormats?.Any() ?? false)
{
var formats = AVMetadataObjectType.None;
foreach (var f in ScanningOptions.PossibleFormats)
{
formats |= AVCaptureBarcodeFormatFromZXingBarcodeFormat(f);
}
formats &= ~AVMetadataObjectType.None;
metadataOutput.MetadataObjectTypes = formats;
}
else
{
var availableMetaObjTypes = metadataOutput.AvailableMetadataObjectTypes;
metadataOutput.MetadataObjectTypes = metadataOutput.AvailableMetadataObjectTypes;
}
previewLayer = new AVCaptureVideoPreviewLayer(session);
previewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
previewLayer.Frame = new CGRect(0, 0, this.Frame.Width, this.Frame.Height);
previewLayer.Position = new CGPoint(this.Layer.Bounds.Width / 2, (this.Layer.Bounds.Height / 2));
layerView = new UIView(new CGRect(0, 0, this.Frame.Width, this.Frame.Height));
layerView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
layerView.Layer.AddSublayer(previewLayer);
AddSubview(layerView);
ResizePreview(UIApplication.SharedApplication.StatusBarOrientation);
if (overlayView != null)
{
AddSubview(overlayView);
BringSubviewToFront(overlayView);
}
session.StartRunning();
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ContinuousAutoFocus))
{
NSError err = null;
if (captureDevice.LockForConfiguration(out err))
{
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ContinuousAutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.ContinuousAutoFocus;
}
else if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.AutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.AutoFocus;
}
if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.ContinuousAutoExposure))
{
captureDevice.ExposureMode = AVCaptureExposureMode.ContinuousAutoExposure;
}
else if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.AutoExpose))
{
captureDevice.ExposureMode = AVCaptureExposureMode.AutoExpose;
}
if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance;
}
else if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.AutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.AutoWhiteBalance;
}
if (UIDevice.CurrentDevice.CheckSystemVersion(7, 0) && captureDevice.AutoFocusRangeRestrictionSupported)
{
captureDevice.AutoFocusRangeRestriction = AVCaptureAutoFocusRangeRestriction.Near;
}
if (captureDevice.FocusPointOfInterestSupported)
{
captureDevice.FocusPointOfInterest = new CGPoint(0.5f, 0.5f);
}
if (captureDevice.ExposurePointOfInterestSupported)
{
captureDevice.ExposurePointOfInterest = new CGPoint(0.5f, 0.5f);
}
captureDevice.UnlockForConfiguration();
}
else
{
Console.WriteLine("Failed to Lock for Config: " + err.Description);
}
}
return(true);
}
public override void ViewDidLoad()
{
base.ViewDidLoad ();
weAreRecording = false;
lblError.Hidden = true;
btnStartRecording.SetTitle("Start Recording", UIControlState.Normal);
//Set up session
session = new AVCaptureSession ();
//Set up inputs and add them to the session
//this will only work if using a physical device!
Console.WriteLine ("getting device inputs");
try{
//add video capture device
device = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
input = AVCaptureDeviceInput.FromDevice (device);
session.AddInput (input);
//add audio capture device
audioDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Audio);
audioInput = AVCaptureDeviceInput.FromDevice(audioDevice);
session.AddInput(audioInput);
}
catch(Exception ex){
//show the label error. This will always show when running in simulator instead of physical device.
lblError.Hidden = false;
return;
}
//Set up preview layer (shows what the input device sees)
Console.WriteLine ("setting up preview layer");
previewlayer = new AVCaptureVideoPreviewLayer (session);
previewlayer.Frame = this.View.Bounds;
//this code makes UI controls sit on top of the preview layer! Allows you to just place the controls in interface builder
UIView cameraView = new UIView ();
cameraView = new UIView ();
cameraView.Layer.AddSublayer (previewlayer);
this.View.AddSubview (cameraView);
this.View.SendSubviewToBack (cameraView);
Console.WriteLine ("Configuring output");
output = new AVCaptureMovieFileOutput ();
long totalSeconds = 10000;
Int32 preferredTimeScale = 30;
CMTime maxDuration = new CMTime (totalSeconds, preferredTimeScale);
output.MinFreeDiskSpaceLimit = 1024 * 1024;
output.MaxRecordedDuration = maxDuration;
if (session.CanAddOutput (output)) {
session.AddOutput (output);
}
session.SessionPreset = AVCaptureSession.PresetMedium;
Console.WriteLine ("About to start running session");
session.StartRunning ();
//toggle recording button was pushed.
btnStartRecording.TouchUpInside += startStopPushed;
//Console.ReadLine ();
}
public override async void ViewDidLoad()
{
base.ViewDidLoad();
NavigationController.SetNavigationBarHidden(true, false);
CGRect ScreenBounds = UIScreen.MainScreen.Bounds;
View.Frame = ScreenBounds;
View.Bounds = ScreenBounds;
previewLayer = new AVCaptureVideoPreviewLayer
{
BackgroundColor = UIColor.LightGray.CGColor,
MasksToBounds = true,
VideoGravity = AVLayerVideoGravity.ResizeAspectFill,
Frame = this.View.Bounds
};
View.Layer.AddSublayer(previewLayer);
//PreivewImage
PreviewImage = new UIImageView()
{
Frame = new RectangleF(0, 0,
(float)ScreenBounds.Width / 4,
(float)View.Frame.Height / 4),
Alpha = 0.75f,
UserInteractionEnabled = true
};
//TakePhoto button
TakePhotoButton = new UIButton(UIButtonType.System)
{
Frame = new RectangleF((float)ScreenBounds.Width - 70f,
((float)View.Frame.Height / 2) - 30f,
60f, 60f),
BackgroundColor = UIColor.Black.ColorWithAlpha(0.25f),
};
TakePhotoButton.TintColor = UIColor.White;
TakePhotoButton.SetImage(UIImage.FromFile("Images/Camera.png"), UIControlState.Normal);
TakePhotoButton.Layer.CornerRadius = 30f;
TakePhotoButton.SetCommand(this.ViewModel.DescribeImageCommand);
//SwapCamera button
SwapCameraButton = new UIButton(UIButtonType.System)
{
Frame = new RectangleF((float)ScreenBounds.Width / 2 - 30f,
10f,
60f, 60f),
BackgroundColor = UIColor.Black.ColorWithAlpha(0.25f),
};
SwapCameraButton.TintColor = UIColor.White;
SwapCameraButton.SetImage(UIImage.FromFile("Images/SwitchCamera.png"), UIControlState.Normal);
SwapCameraButton.Layer.CornerRadius = 30f;
SwapCameraButton.SetCommand(this.ViewModel.SwapCameraCommand);
//Settings button
SettingsButton = new UIButton(UIButtonType.System)
{
Frame = new RectangleF((float)ScreenBounds.Width - 70f,
10f,
60f, 60f),
BackgroundColor = UIColor.Black.ColorWithAlpha(0.25f),
};
SettingsButton.TintColor = UIColor.White;
SettingsButton.SetImage(UIImage.FromFile("Images/Settings.png"), UIControlState.Normal);
SettingsButton.Layer.CornerRadius = 30f;
SettingsButton.SetCommand(this.ViewModel.GotoSettingsCommand);
//Message Label
MessageText = new UITextView
{
Frame = new RectangleF(40f, (float)View.Frame.Height - 180f, (float)UIScreen.MainScreen.Bounds.Width - 80f, 180f),
TextAlignment = UITextAlignment.Center,
TextColor = UIColor.White,
Text = Strings.AppName.Localize(),
UserInteractionEnabled = false,
BackgroundColor = UIColor.FromRGBA(255, 255, 255, 0)
};
MessageText.Font = MessageText.Font.WithSize(24.0f);
View.AddSubview(TakePhotoButton);
View.AddSubview(SwapCameraButton);
View.AddSubview(SettingsButton);
View.AddSubview(PreviewImage);
View.AddSubview(MessageText);
// Tap
PreviewImage.AddGestureRecognizer(new UITapGestureRecognizer(tap =>
{
if (PreviewImageCollapsed)
{
PreviewImage.Frame = new RectangleF(0, 0,
(float)ScreenBounds.Width,
(float)View.Frame.Height);
PreviewImage.Alpha = 1f;
}
else
{
PreviewImage.Frame = new RectangleF(0, 0,
(float)ScreenBounds.Width / 4,
(float)View.Frame.Height / 4);
PreviewImage.Alpha = 0.75f;
}
PreviewImageCollapsed = !PreviewImageCollapsed;
}));
this.RegisterMessages();
this.bindings = new List <Binding>()
{
this.SetBinding(() => ViewModel.StatusMessage, () => MessageText.Text, BindingMode.OneWay)
};
await ViewModel.InitializeStreamingAsync();
await ViewModel.CheckShowConsentAsync();
}
bool SetupCaptureSession()
{
session = new AVCaptureSession();
AVCaptureDevice device = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
if (device == null) {
Console.WriteLine("No video camera (in simulator?)");
return false; // simulator?
}
NSError error = null;
AVCaptureDeviceInput input = AVCaptureDeviceInput.FromDevice(device, out error);
if (input == null)
Console.WriteLine("Error: " + error);
else
session.AddInput(input);
AVCaptureMetadataOutput output = new AVCaptureMetadataOutput();
var dg = new CaptureDelegate(this);
output.SetDelegate(dg, MonoTouch.CoreFoundation.DispatchQueue.MainQueue);
session.AddOutput(output);
// This could be any list of supported barcode types
output.MetadataObjectTypes = new NSString[] {AVMetadataObject.TypeQRCode, AVMetadataObject.TypeAztecCode};
// OR you could just accept "all" with the following line;
// output.MetadataObjectTypes = output.AvailableMetadataObjectTypes; // empty
// DEBUG: use this if you're curious about the available types
// foreach (var t in output.AvailableMetadataObjectTypes)
// Console.WriteLine(t);
AVCaptureVideoPreviewLayer previewLayer = new AVCaptureVideoPreviewLayer(session);
//previewLayer.Frame = new RectangleF(0,0, View.Frame.Size.Width, View.Frame.Size.Height);
previewLayer.Frame = new RectangleF(0, 0, 320, 290);
previewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill.ToString();
View.Layer.AddSublayer (previewLayer);
session.StartRunning();
Console.WriteLine("StartRunning");
return true;
}
bool SetupCaptureSession()
{
// configure the capture session for low resolution, change this if your code
// can cope with more data or volume
session = new AVCaptureSession()
{
SessionPreset = AVCaptureSession.Preset640x480
};
// create a device input and attach it to the session
// var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
AVCaptureDevice captureDevice = null;
var devices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
foreach (var device in devices)
{
captureDevice = device;
if (options.UseFrontCameraIfAvailable.HasValue &&
options.UseFrontCameraIfAvailable.Value &&
device.Position == AVCaptureDevicePosition.Front)
{
break; //Front camera successfully set
}
else if (device.Position == AVCaptureDevicePosition.Back && (!options.UseFrontCameraIfAvailable.HasValue || !options.UseFrontCameraIfAvailable.Value))
{
break; //Back camera succesfully set
}
}
if (captureDevice == null)
{
Console.WriteLine("No captureDevice - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
}
return(false);
}
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
Console.WriteLine("No input - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
}
return(false);
}
else
{
session.AddInput(input);
}
previewLayer = new AVCaptureVideoPreviewLayer(session);
//Framerate set here (15 fps)
if (previewLayer.RespondsToSelector(new Selector("connection")))
{
previewLayer.Connection.VideoMinFrameDuration = new CMTime(1, 10);
}
previewLayer.LayerVideoGravity = AVLayerVideoGravity.ResizeAspectFill;
previewLayer.Frame = new RectangleF(0, 0, this.Frame.Width, this.Frame.Height);
previewLayer.Position = new PointF(this.Layer.Bounds.Width / 2, (this.Layer.Bounds.Height / 2));
layerView = new UIView(new RectangleF(0, 0, this.Frame.Width, this.Frame.Height));
layerView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
layerView.Layer.AddSublayer(previewLayer);
this.AddSubview(layerView);
ResizePreview(UIApplication.SharedApplication.StatusBarOrientation);
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
//overlayView.LayoutSubviews ();
}
session.StartRunning();
Console.WriteLine("RUNNING!!!");
// create a VideoDataOutput and add it to the sesion
output = new AVCaptureVideoDataOutput()
{
//videoSettings
VideoSettings = new AVVideoSettings(CVPixelFormatType.CV32BGRA),
};
// configure the output
queue = new MonoTouch.CoreFoundation.DispatchQueue("ZxingScannerView"); // (Guid.NewGuid().ToString());
var barcodeReader = new BarcodeReader(null, (img) =>
{
var src = new RGBLuminanceSource(img); //, bmp.Width, bmp.Height);
//Don't try and rotate properly if we're autorotating anyway
if (ScanningOptions.AutoRotate.HasValue && ScanningOptions.AutoRotate.Value)
{
return(src);
}
var tmpInterfaceOrientation = UIInterfaceOrientation.Portrait;
InvokeOnMainThread(() => tmpInterfaceOrientation = UIApplication.SharedApplication.StatusBarOrientation);
switch (tmpInterfaceOrientation)
{
case UIInterfaceOrientation.Portrait:
return(src.rotateCounterClockwise().rotateCounterClockwise().rotateCounterClockwise());
case UIInterfaceOrientation.PortraitUpsideDown:
return(src.rotateCounterClockwise().rotateCounterClockwise().rotateCounterClockwise());
case UIInterfaceOrientation.LandscapeLeft:
return(src);
case UIInterfaceOrientation.LandscapeRight:
return(src);
}
return(src);
}, null, null); //(p, w, h, f) => new RGBLuminanceSource(p, w, h, RGBLuminanceSource.BitmapFormat.Unknown));
if (ScanningOptions.TryHarder.HasValue)
{
Console.WriteLine("TRY_HARDER: " + ScanningOptions.TryHarder.Value);
barcodeReader.Options.TryHarder = ScanningOptions.TryHarder.Value;
}
if (ScanningOptions.PureBarcode.HasValue)
{
barcodeReader.Options.PureBarcode = ScanningOptions.PureBarcode.Value;
}
if (ScanningOptions.AutoRotate.HasValue)
{
Console.WriteLine("AUTO_ROTATE: " + ScanningOptions.AutoRotate.Value);
barcodeReader.AutoRotate = ScanningOptions.AutoRotate.Value;
}
if (!string.IsNullOrEmpty(ScanningOptions.CharacterSet))
{
barcodeReader.Options.CharacterSet = ScanningOptions.CharacterSet;
}
if (ScanningOptions.TryInverted.HasValue)
{
barcodeReader.TryInverted = ScanningOptions.TryInverted.Value;
}
if (ScanningOptions.PossibleFormats != null && ScanningOptions.PossibleFormats.Count > 0)
{
barcodeReader.Options.PossibleFormats = new List <BarcodeFormat>();
foreach (var pf in ScanningOptions.PossibleFormats)
{
barcodeReader.Options.PossibleFormats.Add(pf);
}
}
outputRecorder = new OutputRecorder(ScanningOptions, img =>
{
if (!IsAnalyzing)
{
return;
}
try
{
var started = DateTime.Now;
var rs = barcodeReader.Decode(img);
var total = DateTime.Now - started;
Console.WriteLine("Decode Time: " + total.TotalMilliseconds + " ms");
if (rs != null)
{
resultCallback(rs);
}
}
catch (Exception ex)
{
Console.WriteLine("DECODE FAILED: " + ex);
}
});
output.AlwaysDiscardsLateVideoFrames = true;
output.SetSampleBufferDelegate(outputRecorder, queue);
Console.WriteLine("SetupCamera Finished");
session.AddOutput(output);
//session.StartRunning ();
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ModeContinuousAutoFocus))
{
NSError err = null;
if (captureDevice.LockForConfiguration(out err))
{
captureDevice.FocusMode = AVCaptureFocusMode.ModeContinuousAutoFocus;
if (captureDevice.FocusPointOfInterestSupported)
{
captureDevice.FocusPointOfInterest = new PointF(0.5f, 0.5f);
}
captureDevice.UnlockForConfiguration();
}
else
{
Console.WriteLine("Failed to Lock for Config: " + err.Description);
}
}
return(true);
}
bool SetupCaptureSession ()
{
// configure the capture session for low resolution, change this if your code
// can cope with more data or volume
session = new AVCaptureSession () {
SessionPreset = AVCaptureSession.Preset640x480
};
// create a device input and attach it to the session
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
if (captureDevice == null){
Console.WriteLine ("No captureDevice - this won't work on the simulator, try a physical device");
return false;
}
var input = AVCaptureDeviceInput.FromDevice (captureDevice);
if (input == null){
Console.WriteLine ("No input - this won't work on the simulator, try a physical device");
return false;
}
else
session.AddInput (input);
previewLayer = new AVCaptureVideoPreviewLayer(session);
//Framerate set here (15 fps)
if (previewLayer.RespondsToSelector(new Selector("connection")))
previewLayer.Connection.VideoMinFrameDuration = new CMTime(1, 10);
previewLayer.LayerVideoGravity = AVLayerVideoGravity.ResizeAspectFill;
previewLayer.Frame = this.Frame;
previewLayer.Position = new PointF(this.Layer.Bounds.Width / 2, (this.Layer.Bounds.Height / 2));
layerView = new UIView(this.Frame);
layerView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
layerView.Layer.AddSublayer(previewLayer);
this.AddSubview(layerView);
ResizePreview(UIApplication.SharedApplication.StatusBarOrientation);
if (overlayView != null)
{
this.AddSubview (overlayView);
this.BringSubviewToFront (overlayView);
//overlayView.LayoutSubviews ();
}
session.StartRunning ();
Console.WriteLine ("RUNNING!!!");
// create a VideoDataOutput and add it to the sesion
output = new AVCaptureVideoDataOutput () {
//videoSettings
VideoSettings = new AVVideoSettings (CVPixelFormatType.CV32BGRA),
};
// configure the output
queue = new MonoTouch.CoreFoundation.DispatchQueue("ZxingScannerView"); // (Guid.NewGuid().ToString());
var barcodeReader = new BarcodeReader(null, (img) =>
{
var src = new RGBLuminanceSource(img); //, bmp.Width, bmp.Height);
//Don't try and rotate properly if we're autorotating anyway
if (options.AutoRotate.HasValue && options.AutoRotate.Value)
return src;
switch (UIDevice.CurrentDevice.Orientation)
{
case UIDeviceOrientation.Portrait:
return src.rotateCounterClockwise().rotateCounterClockwise().rotateCounterClockwise();
case UIDeviceOrientation.PortraitUpsideDown:
return src.rotateCounterClockwise().rotateCounterClockwise().rotateCounterClockwise();
case UIDeviceOrientation.LandscapeLeft:
return src;
case UIDeviceOrientation.LandscapeRight:
return src;
}
return src;
}, null, null); //(p, w, h, f) => new RGBLuminanceSource(p, w, h, RGBLuminanceSource.BitmapFormat.Unknown));
if (this.options.TryHarder.HasValue)
{
Console.WriteLine("TRY_HARDER: " + this.options.TryHarder.Value);
barcodeReader.Options.TryHarder = this.options.TryHarder.Value;
}
if (this.options.PureBarcode.HasValue)
barcodeReader.Options.PureBarcode = this.options.PureBarcode.Value;
if (this.options.AutoRotate.HasValue)
{
Console.WriteLine("AUTO_ROTATE: " + this.options.AutoRotate.Value);
barcodeReader.AutoRotate = this.options.AutoRotate.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);
}
outputRecorder = new OutputRecorder (this.options, img =>
{
try
{
var started = DateTime.Now;
var rs = barcodeReader.Decode(img);
var total = DateTime.Now - started;
Console.WriteLine("Decode Time: " + total.TotalMilliseconds + " ms");
if (rs != null)
resultCallback(rs);
}
catch (Exception ex)
{
Console.WriteLine("DECODE FAILED: " + ex);
}
});
output.AlwaysDiscardsLateVideoFrames = true;
output.SetSampleBufferDelegate (outputRecorder, queue);
Console.WriteLine("SetupCamera Finished");
session.AddOutput (output);
//session.StartRunning ();
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ModeContinuousAutoFocus))
{
NSError err = null;
if (captureDevice.LockForConfiguration(out err))
{
captureDevice.FocusMode = AVCaptureFocusMode.ModeContinuousAutoFocus;
if (captureDevice.FocusPointOfInterestSupported)
captureDevice.FocusPointOfInterest = new PointF(0.5f, 0.5f);
captureDevice.UnlockForConfiguration();
}
else
Console.WriteLine("Failed to Lock for Config: " + err.Description);
}
return true;
}
bool SetupCaptureSession()
{
var started = DateTime.UtcNow;
var availableResolutions = new List <CameraResolution> ();
var consideredResolutions = new Dictionary <NSString, CameraResolution> {
{ AVCaptureSession.Preset352x288, new CameraResolution {
Width = 352, Height = 288
} },
{ AVCaptureSession.PresetMedium, new CameraResolution {
Width = 480, Height = 360
} }, //480x360
{ AVCaptureSession.Preset640x480, new CameraResolution {
Width = 640, Height = 480
} },
{ AVCaptureSession.Preset1280x720, new CameraResolution {
Width = 1280, Height = 720
} },
{ AVCaptureSession.Preset1920x1080, new CameraResolution {
Width = 1920, Height = 1080
} }
};
// configure the capture session for low resolution, change this if your code
// can cope with more data or volume
session = new AVCaptureSession()
{
SessionPreset = AVCaptureSession.Preset640x480
};
// create a device input and attach it to the session
// var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
AVCaptureDevice captureDevice = null;
var devices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
foreach (var device in devices)
{
captureDevice = device;
if (ScanningOptions.UseFrontCameraIfAvailable.HasValue &&
ScanningOptions.UseFrontCameraIfAvailable.Value &&
device.Position == AVCaptureDevicePosition.Front)
{
break; //Front camera successfully set
}
else if (device.Position == AVCaptureDevicePosition.Back && (!ScanningOptions.UseFrontCameraIfAvailable.HasValue || !ScanningOptions.UseFrontCameraIfAvailable.Value))
{
break; //Back camera succesfully set
}
}
if (captureDevice == null)
{
Console.WriteLine("No captureDevice - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
}
return(false);
}
CameraResolution resolution = null;
// Find resolution
// Go through the resolutions we can even consider
foreach (var cr in consideredResolutions)
{
// Now check to make sure our selected device supports the resolution
// so we can add it to the list to pick from
if (captureDevice.SupportsAVCaptureSessionPreset(cr.Key))
{
availableResolutions.Add(cr.Value);
}
}
resolution = ScanningOptions.GetResolution(availableResolutions);
// See if the user selected a resolution
if (resolution != null)
{
// Now get the preset string from the resolution chosen
var preset = (from c in consideredResolutions
where c.Value.Width == resolution.Width &&
c.Value.Height == resolution.Height
select c.Key).FirstOrDefault();
// If we found a matching preset, let's set it on the session
if (!string.IsNullOrEmpty(preset))
{
session.SessionPreset = preset;
}
}
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
Console.WriteLine("No input - this won't work on the simulator, try a physical device");
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
}
return(false);
}
else
{
session.AddInput(input);
}
var startedAVPreviewLayerAlloc = PerformanceCounter.Start();
previewLayer = new AVCaptureVideoPreviewLayer(session);
PerformanceCounter.Stop(startedAVPreviewLayerAlloc, "Alloc AVCaptureVideoPreviewLayer took {0} ms.");
// //Framerate set here (15 fps)
// if (UIDevice.CurrentDevice.CheckSystemVersion (7, 0))
// {
// var perf1 = PerformanceCounter.Start ();
// NSError lockForConfigErr = null;
// captureDevice.LockForConfiguration (out lockForConfigErr);
// if (lockForConfigErr == null)
// {
// captureDevice.ActiveVideoMinFrameDuration = new CMTime (1, 10);
// captureDevice.UnlockForConfiguration ();
// }
// PerformanceCounter.Stop (perf1, "PERF: ActiveVideoMinFrameDuration Took {0} ms");
// }
// else
// previewLayer.Connection.VideoMinFrameDuration = new CMTime(1, 10);
var perf2 = PerformanceCounter.Start();
#if __UNIFIED__
previewLayer.VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
#else
previewLayer.LayerVideoGravity = AVLayerVideoGravity.ResizeAspectFill;
#endif
previewLayer.Frame = new CGRect(0, 0, this.Frame.Width, this.Frame.Height);
previewLayer.Position = new CGPoint(this.Layer.Bounds.Width / 2, (this.Layer.Bounds.Height / 2));
layerView = new UIView(new CGRect(0, 0, this.Frame.Width, this.Frame.Height));
layerView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
layerView.Layer.AddSublayer(previewLayer);
this.AddSubview(layerView);
ResizePreview(UIApplication.SharedApplication.StatusBarOrientation);
if (overlayView != null)
{
this.AddSubview(overlayView);
this.BringSubviewToFront(overlayView);
//overlayView.LayoutSubviews ();
}
PerformanceCounter.Stop(perf2, "PERF: Setting up layers took {0} ms");
var perf3 = PerformanceCounter.Start();
session.StartRunning();
PerformanceCounter.Stop(perf3, "PERF: session.StartRunning() took {0} ms");
var perf4 = PerformanceCounter.Start();
var videoSettings = NSDictionary.FromObjectAndKey(new NSNumber((int)CVPixelFormatType.CV32BGRA),
CVPixelBuffer.PixelFormatTypeKey);
// create a VideoDataOutput and add it to the sesion
output = new AVCaptureVideoDataOutput {
WeakVideoSettings = videoSettings
};
// configure the output
queue = new DispatchQueue("ZxingScannerView"); // (Guid.NewGuid().ToString());
var barcodeReader = ScanningOptions.BuildBarcodeReader();
outputRecorder = new OutputRecorder(this, img =>
{
var ls = img;
if (!IsAnalyzing)
{
return(false);
}
try
{
var perfDecode = PerformanceCounter.Start();
if (shouldRotatePreviewBuffer)
{
ls = ls.rotateCounterClockwise();
}
var result = barcodeReader.Decode(ls);
PerformanceCounter.Stop(perfDecode, "Decode Time: {0} ms");
if (result != null)
{
resultCallback(new MobileResult(result));
return(true);
}
}
catch (Exception ex)
{
Console.WriteLine("DECODE FAILED: " + ex);
}
return(false);
});
output.AlwaysDiscardsLateVideoFrames = true;
output.SetSampleBufferDelegate(outputRecorder, queue);
PerformanceCounter.Stop(perf4, "PERF: SetupCamera Finished. Took {0} ms.");
session.AddOutput(output);
//session.StartRunning ();
var perf5 = PerformanceCounter.Start();
NSError err = null;
if (captureDevice.LockForConfiguration(out err))
{
if (ScanningOptions.DisableAutofocus)
{
captureDevice.FocusMode = AVCaptureFocusMode.Locked;
}
else
{
if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.ContinuousAutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.ContinuousAutoFocus;
}
else if (captureDevice.IsFocusModeSupported(AVCaptureFocusMode.AutoFocus))
{
captureDevice.FocusMode = AVCaptureFocusMode.AutoFocus;
}
}
if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.ContinuousAutoExposure))
{
captureDevice.ExposureMode = AVCaptureExposureMode.ContinuousAutoExposure;
}
else if (captureDevice.IsExposureModeSupported(AVCaptureExposureMode.AutoExpose))
{
captureDevice.ExposureMode = AVCaptureExposureMode.AutoExpose;
}
if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance;
}
else if (captureDevice.IsWhiteBalanceModeSupported(AVCaptureWhiteBalanceMode.AutoWhiteBalance))
{
captureDevice.WhiteBalanceMode = AVCaptureWhiteBalanceMode.AutoWhiteBalance;
}
if (UIDevice.CurrentDevice.CheckSystemVersion(7, 0) && captureDevice.AutoFocusRangeRestrictionSupported)
{
captureDevice.AutoFocusRangeRestriction = AVCaptureAutoFocusRangeRestriction.Near;
}
if (captureDevice.FocusPointOfInterestSupported)
{
captureDevice.FocusPointOfInterest = new PointF(0.5f, 0.5f);
}
if (captureDevice.ExposurePointOfInterestSupported)
{
captureDevice.ExposurePointOfInterest = new PointF(0.5f, 0.5f);
}
captureDevice.UnlockForConfiguration();
}
else
{
Console.WriteLine("Failed to Lock for Config: " + err.Description);
}
PerformanceCounter.Stop(perf5, "PERF: Setup Focus in {0} ms.");
return(true);
}
private void createPreview()
{
previewlayer = new AVCaptureVideoPreviewLayer (session);
previewlayer.Frame = this.View.Bounds;
this.cameraView = new UIView ();
this.cameraView.Layer.AddSublayer (previewlayer);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
this.View.BackgroundColor = UIColor.White;
NSError error;
// Create the session. The AVCaptureSession is the managing instance of the whole video handling.
var captureSession = new AVCaptureSession()
{
// Defines what quality we want to use for the images we grab. Photo gives highest resolutions.
SessionPreset = AVCaptureSession.PresetPhoto
};
// Find a suitable AVCaptureDevice for video input.
var device = AVCaptureDevice.GetDefaultDevice(AVMediaType.Video);
if (device == null)
{
// This will not work on the iOS Simulator - there is no camera. :-)
throw new InvalidProgramException("Failed to get AVCaptureDevice for video input!");
}
// Create a device input with the device and add it to the session.
var videoInput = AVCaptureDeviceInput.FromDevice(device, out error);
if (videoInput == null)
{
throw new InvalidProgramException("Failed to get AVCaptureDeviceInput from AVCaptureDevice!");
}
// Let session read from the input, this is our source.
captureSession.AddInput(videoInput);
// Create output for the video stream. This is the destination.
var videoOutput = new AVCaptureVideoDataOutput()
{
AlwaysDiscardsLateVideoFrames = true
};
// Define the video format we want to use. Note that Xamarin exposes the CompressedVideoSetting and UncompressedVideoSetting
// properties on AVCaptureVideoDataOutput un Unified API, but I could not get these to work. The VideoSettings property is deprecated,
// so I use the WeakVideoSettings instead which takes an NSDictionary as input.
this.videoSettingsDict = new NSMutableDictionary();
this.videoSettingsDict.Add(CVPixelBuffer.PixelFormatTypeKey, NSNumber.FromUInt32((uint)CVPixelFormatType.CV32BGRA));
videoOutput.WeakVideoSettings = this.videoSettingsDict;
// Create a delegate to report back to us when an image has been captured.
// We want to grab the camera stream and feed it through a AVCaptureVideoDataOutputSampleBufferDelegate
// which allows us to get notified if a new image is availeble. An implementation of that delegate is VideoFrameSampleDelegate in this project.
this.sampleBufferDelegate = new VideoFrameSamplerDelegate();
// Processing happens via Grand Central Dispatch (GCD), so we need to provide a queue.
// This is pretty much like a system managed thread (see: http://zeroheroblog.com/ios/concurrency-in-ios-grand-central-dispatch-gcd-dispatch-queues).
this.sessionQueue = new DispatchQueue("AVSessionQueue");
// Assign the queue and the delegate to the output. Now all output will go through the delegate.
videoOutput.SetSampleBufferDelegateQueue(this.sampleBufferDelegate, this.sessionQueue);
// Add output to session.
captureSession.AddOutput(videoOutput);
// We also want to visualize the input stream. The raw stream can be fed into an AVCaptureVideoPreviewLayer, which is a subclass of CALayer.
// A CALayer can be added to a UIView. We add that layer to the controller's main view.
var layer = this.View.Layer;
this.videoLayer = AVCaptureVideoPreviewLayer.FromSession(captureSession);
this.videoLayer.Frame = layer.Bounds;
layer.AddSublayer(this.videoLayer);
// All setup! Start capturing!
captureSession.StartRunning();
// Configure framerate. Kind of weird way of doing it but the only one that works.
device.LockForConfiguration(out error);
// CMTime constructor means: 1 = one second, DETECTION_FPS = how many samples per unit, which is 1 second in this case.
device.ActiveVideoMinFrameDuration = new CMTime(1, DETECTION_FPS);
device.ActiveVideoMaxFrameDuration = new CMTime(1, DETECTION_FPS);
device.UnlockForConfiguration();
}
