/******************************* 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);
};
}
void SetupLiveCameraStream()
{
_captureSession = new AVCaptureSession();
var viewLayer = _liveCameraStream.Layer;
_videoPreviewLayer = new AVCaptureVideoPreviewLayer(_captureSession)
{
Frame = _liveCameraStream.Bounds
};
_liveCameraStream.Layer.AddSublayer(_videoPreviewLayer);
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();
}
void setupAVCapture()
{
session = new AVCaptureSession();
session.SessionPreset = AVCaptureSession.PresetHigh;
previewView.Session = session;
updateCameraSelection();
CALayer rootLayer = previewView.Layer;
rootLayer.MasksToBounds = true;
(previewView.Layer as AVCaptureVideoPreviewLayer).VideoGravity = AVLayerVideoGravity.ResizeAspectFill.ToString();
previewView.Layer.BackgroundColor = UIColor.Black.CGColor;
setupAVFoundationFaceDetection();
if (device != null)
{
device.AddObserver(this, (NSString)"videoZoomFactor", (NSKeyValueObservingOptions)0,
VideoZoomFactorContext);
device.AddObserver(this, (NSString)"rampingVideoZoom", (NSKeyValueObservingOptions)0,
VideoZoomRampingContext);
}
session.StartRunning();
}
public void SetupLiveCameraStream(object cameraView)
{
_cameraView = (UIView)cameraView;
captureSession = new AVCaptureSession();
var videoPreviewLayer = new AVCaptureVideoPreviewLayer(captureSession)
{
Frame = _cameraView.Frame,
VideoGravity = AVLayerVideoGravity.ResizeAspectFill
};
_cameraView.Layer.AddSublayer(videoPreviewLayer);
var captureDevice = AVCaptureDevice.GetDefaultDevice(AVMediaType.Video);
ConfigureCameraForDevice(captureDevice);
captureDeviceInput = AVCaptureDeviceInput.FromDevice(captureDevice);
captureSession.AddInput(captureDeviceInput);
var dictionary = new NSMutableDictionary();
dictionary[AVVideo.CodecKey] = new NSNumber((int)AVVideoCodec.JPEG);
stillImageOutput = new AVCaptureStillImageOutput()
{
OutputSettings = new NSDictionary()
};
captureSession.AddOutput(stillImageOutput);
captureSession.StartRunning();
}
public void SetupLiveCameraStream()
{
captureSession = new AVCaptureSession();
//var viewLayer = liveCameraStream.Layer;
var videoPreviewLayer = new AVCaptureVideoPreviewLayer(captureSession)
{
Frame = liveCameraStream.Bounds
};
liveCameraStream.Layer.AddSublayer(videoPreviewLayer);
var captureDevice = AVCaptureDevice.GetDefaultDevice(AVMediaTypes.Video);
// HACK: Dunno why this is returning null????
if (captureDevice is null)
{
return;
}
ConfigureCameraForDevice(captureDevice);
captureDeviceInput = AVCaptureDeviceInput.FromDevice(captureDevice);
//var dictionary = new NSMutableDictionary
//{
// [AVVideo.CodecKey] = new NSNumber((int)AVVideoCodec.JPEG)
//};
stillImageOutput = new AVCaptureStillImageOutput()
{
OutputSettings = new NSDictionary()
};
captureSession.AddOutput(stillImageOutput);
captureSession.AddInput(captureDeviceInput);
captureSession.StartRunning();
}
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();
}
void setupAVCapture ()
{
session = new AVCaptureSession ();
session.SessionPreset = AVCaptureSession.PresetHigh;
previewView.Session = session;
updateCameraSelection ();
CALayer rootLayer = previewView.Layer;
rootLayer.MasksToBounds = true;
// HACK: Remove .ToString() for AVLayerVideoGravity
// (previewView.Layer as AVCaptureVideoPreviewLayer).VideoGravity = AVLayerVideoGravity.ResizeAspectFill.ToString();
(previewView.Layer as AVCaptureVideoPreviewLayer).VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
previewView.Layer.BackgroundColor = UIColor.Black.CGColor;
setupAVFoundationFaceDetection ();
if (device != null) {
device.AddObserver (this, (NSString) "videoZoomFactor", (NSKeyValueObservingOptions)0,
VideoZoomFactorContext);
device.AddObserver (this, (NSString) "rampingVideoZoom", (NSKeyValueObservingOptions)0,
VideoZoomRampingContext);
}
session.StartRunning ();
}
public void SetupLiveCameraStream()
{
captureSession = new AVCaptureSession();
// var viewLayer = liveCameraStream.Layer;
// videoPreviewLayer = new AVCaptureVideoPreviewLayer(captureSession)
// {
// Frame = this.View.Frame
// };
// liveCameraStream.Layer.AddSublayer(videoPreviewLayer);
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
ConfigureCameraForDevice(captureDevice);
captureDeviceInput = AVCaptureDeviceInput.FromDevice(captureDevice);
captureSession.AddInput(captureDeviceInput);
var dictionary = new NSMutableDictionary();
dictionary[AVVideo.CodecKey] = new NSNumber((int)AVVideoCodec.JPEG);
stillImageOutput = new AVCaptureStillImageOutput()
{
OutputSettings = new NSDictionary()
};
captureSession.AddOutput(stillImageOutput);
captureSession.StartRunning();
}
public void RecordVideoToPath(UIViewController ViewController, string VideoPath)
{
// setup capture device
AVCaptureDevice videoRecordingDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
NSError error;
AVCaptureDeviceInput videoInput = new AVCaptureDeviceInput(videoRecordingDevice, out error);
// create and assign a capture session
AVCaptureSession captureSession = new AVCaptureSession();
captureSession.SessionPreset = AVCaptureSession.Preset1280x720;
captureSession.AddInput(videoInput);
// Create capture device output
AVCaptureVideoDataOutput videoOutput = new AVCaptureVideoDataOutput();
captureSession.AddOutput(videoOutput);
videoOutput.VideoSettings.PixelFormat = CVPixelFormatType.CV32BGRA;
videoOutput.MinFrameDuration = new CMTime(1, 30);
videoOutput.SetSampleBufferDelegatequeue(captureVideoDelegate, System.IntPtr.Zero);
// create a delegate class for handling capture
captureVideoDelegate = new CaptureVideoDelegate(ViewController);
// Start capture session
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.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;
}
/// <summary>
/// Initializes this instance.
/// </summary>
private void Initialize()
{
var captureSession = new AVCaptureSession();
_previewLayer = new AVCaptureVideoPreviewLayer(captureSession)
{
LayerVideoGravity = AVLayerVideoGravity.ResizeAspectFill,
Frame = Bounds
};
var device = AVCaptureDevice.DefaultDeviceWithMediaType(
AVMediaType.Video);
if (device == null)
{
System.Diagnostics.Debug.WriteLine("No device detected.");
return;
}
NSError error;
var input = new AVCaptureDeviceInput(device, out error);
captureSession.AddInput(input);
Layer.AddSublayer(_previewLayer);
captureSession.StartRunning();
}
private void SetupLiveCameraStream()
{
captureSession = new AVCaptureSession();
var videoPreviewLayer = new AVCaptureVideoPreviewLayer(captureSession)
{
Frame = liveCameraStream.Bounds
};
liveCameraStream.Layer.AddSublayer(videoPreviewLayer);
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
ConfigureCameraForDevice(captureDevice);
captureDeviceInput = AVCaptureDeviceInput.FromDevice(captureDevice);
stillImageOutput = new AVCaptureStillImageOutput
{
OutputSettings = new NSDictionary()
};
captureSession.AddOutput(stillImageOutput);
captureSession.AddInput(captureDeviceInput);
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.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){
Console.WriteLine ("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),
// If you want to cap the frame rate at a given speed, in this sample: 15 frames per second
MinFrameDuration = new CMTime (1, 15)
};
// configure the output
queue = new MonoTouch.CoreFoundation.DispatchQueue ("myQueue");
outputRecorder = new OutputRecorder ();
output.SetSampleBufferDelegateAndQueue (outputRecorder, queue);
session.AddOutput (output);
session.StartRunning ();
return true;
}
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;
}
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);
if (captureDevice == null)
{
Console.WriteLine("No captureDevice - this won't work on the simulator, try a physical device");
return(false);
}
//Configure for 15 FPS. Note use of LockForConigfuration()/UnlockForConfiguration()
NSError error = null;
captureDevice.LockForConfiguration(out error);
if (error != null)
{
Console.WriteLine(error);
captureDevice.UnlockForConfiguration();
return(false);
}
if (UIDevice.CurrentDevice.CheckSystemVersion(7, 0))
{
captureDevice.ActiveVideoMinFrameDuration = new CMTime(1, 15);
}
captureDevice.UnlockForConfiguration();
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);
}
session.AddInput(input);
// create a VideoDataOutput and add it to the sesion
var output = new AVCaptureVideoDataOutput()
{
WeakVideoSettings = new CVPixelBufferAttributes()
{
PixelFormatType = CVPixelFormatType.CV32BGRA
}.Dictionary,
};
// configure the output
queue = new CoreFoundation.DispatchQueue("myQueue");
outputRecorder = new OutputRecorder();
output.SetSampleBufferDelegate(outputRecorder, queue);
session.AddOutput(output);
session.StartRunning();
return(true);
}
public void StartPreview()
{
if (!captureSession.Running)
{
captureSession.StartRunning();
}
IsPreviewing = true;
}
public void ResumeCapture()
{
if (!isCapturing)
{
session?.StartRunning();
isCapturing = 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);
if (captureDevice == null)
{
Image <Bgr, Byte> img = new Image <Bgr, byte> (512, 512, new Bgr(255, 255, 255));
CvInvoke.PutText(
img,
"Capture device not found.",
new Point(10, 200),
FontFace.HersheyComplex,
1,
new MCvScalar(),
2);
ImageView.Image = img.ToUIImage();
return(false);
}
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
Console.WriteLine("No input device");
return(false);
}
session.AddInput(input);
// create a VideoDataOutput and add it to the sesion
AVVideoSettingsUncompressed settingUncomp = new AVVideoSettingsUncompressed();
settingUncomp.PixelFormatType = CVPixelFormatType.CV32BGRA;
var output = new AVCaptureVideoDataOutput()
{
UncompressedVideoSetting = settingUncomp,
// If you want to cap the frame rate at a given speed, in this sample: 15 frames per second
//MinFrameDuration = new CMTime (1, 15)
};
// configure the output
queue = new DispatchQueue("myQueue");
outputRecorder = new OutputRecorder(ImageView);
output.SetSampleBufferDelegateQueue(outputRecorder, queue);
session.AddOutput(output);
session.StartRunning();
return(true);
}
public override void ViewDidAppear(bool animated)
{
if (_captureSession == null)
{
AuthorizeCameraUse();
}
else if (!_captureSession.Running)
{
_captureSession.StartRunning();
}
}
public void StartPreviewing(object sender, EventArgs e)
{
if (XamRecorder.IsPreviewing)
{
throw new Exception("Preview has already started.");
}
session.StartRunning();
XamRecorder.IsPreviewing = true;
}
public void ConfigureDeviceAndStart()
{
var device = GetDevice();
if (device == null)
{
return;
}
try
{
if (device.LockForConfiguration(out var error))
{
if (device.IsFocusModeSupported(AVCaptureFocusMode.ContinuousAutoFocus))
{
device.FocusMode = AVCaptureFocusMode.ContinuousAutoFocus;
}
device.UnlockForConfiguration();
}
// Configure Input
var input = AVCaptureDeviceInput.FromDevice(device, out var error2);
_captureSession.AddInput(input);
// Configure Output
var settings = new AVVideoSettingsUncompressed()
{
PixelFormatType = CoreVideo.CVPixelFormatType.CV32BGRA
};
var videoOutput = new AVCaptureVideoDataOutput
{
WeakVideoSettings = settings.Dictionary,
AlwaysDiscardsLateVideoFrames = true
};
var videoCaptureQueue = new DispatchQueue("Video Queue");
videoOutput.SetSampleBufferDelegateQueue(new OutputRecorder(View, _shapeLayer), videoCaptureQueue);
if (_captureSession.CanAddOutput(videoOutput))
{
_captureSession.AddOutput(videoOutput);
}
// Start session
_captureSession.StartRunning();
}
catch (Exception e)
{
Console.Write(e);
}
}
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);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
OCR = new TesseractApi();
CaptureSession = new AVCaptureSession();
ImageOutput = new AVCapturePhotoOutput();
var cameraDevice = AVCaptureDevice.GetDefaultDevice(AVMediaType.Video);
var cameraInput = AVCaptureDeviceInput.FromDevice(cameraDevice);
CaptureSession.AddInput(cameraInput);
CaptureSession.AddOutput(ImageOutput);
SetupUI();
CaptureSession.StartRunning();
Camera = new CameraHandler();
Camera.FinishedProcessing += async delegate
{
PictureView.Image = new UIImage(Camera.Picture, 1f, UIImageOrientation.Right);
Capture = PictureView.Capture();
await InitReader();
};
OCRButton.TouchUpInside += async delegate
{
HandleButtonClick();
};
AlphaNumericSwitch.ValueChanged += async delegate
{
await SetOcrTextLabel();
};
// Selection slider Setup
SelectionBarSlider.TouchUpInside += async delegate
{
await InitReader();
};
SelectionBarSlider.TouchUpOutside += async delegate
{
await InitReader();
};
SelectionBarSlider.ValueChanged += delegate
{
var tempFrame = SelectionBarView.Frame;
tempFrame.Y = (SelectionBarSlider.Value * 92) + 22;
SelectionBarView.Frame = tempFrame;
};
}
public override void ViewDidAppear(bool animated)
{
_orientationChangeEventToken = NSNotificationCenter.DefaultCenter.AddObserver(UIDevice.OrientationDidChangeNotification, CheckDeviceOrientation);
if (_captureSession == null)
{
AuthorizeCameraUse();
}
else if (!_captureSession.Running)
{
_captureSession.StartRunning();
}
}
private void StartCameraPreview()
{
captureSession = new AVCaptureSession();
captureSession.AddInput(AVCaptureDeviceInput.FromDevice(MediaDevices.BackCamera));
captureLayer = new AVCaptureVideoPreviewLayer(captureSession);
captureLayer.Frame = captureView.Bounds;
captureView.Layer.AddSublayer(captureLayer);
captureSession.StartRunning();
}
void SetupAVCapture(NSString sessionPreset)
{
if ((videoTextureCache = CVOpenGLESTextureCache.FromEAGLContext(context)) == null)
{
Console.WriteLine("Could not create the CoreVideo TextureCache");
return;
}
session = new AVCaptureSession();
session.BeginConfiguration();
// Preset size
session.SessionPreset = sessionPreset;
// Input device
var videoDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
if (videoDevice == null)
{
Console.WriteLine("No video device");
return;
}
NSError err;
var input = new AVCaptureDeviceInput(videoDevice, out err);
if (err != null)
{
Console.WriteLine("Error creating video capture device");
return;
}
session.AddInput(input);
// Create the output device
var dataOutput = new AVCaptureVideoDataOutput()
{
AlwaysDiscardsLateVideoFrames = true,
// YUV 420, use "BiPlanar" to split the Y and UV planes in two separate blocks of
// memory, then we can index 0 to get the Y and 1 for the UV planes in the frame decoding
VideoSettings = new AVVideoSettings(CVPixelFormatType.CV420YpCbCr8BiPlanarFullRange)
};
dataOutputDelegate = new DataOutputDelegate(this);
//
// This dispatches the video frames into the main thread, because the OpenGL
// code is accessing the data synchronously.
//
dataOutput.SetSampleBufferDelegateAndQueue(dataOutputDelegate, DispatchQueue.MainQueue);
session.AddOutput(dataOutput);
session.CommitConfiguration();
session.StartRunning();
}
/// <summary>
/// Initializes this instance.
/// </summary>
private void Initialize()
{
var captureSession = new AVCaptureSession();
_previewLayer = new AVCaptureVideoPreviewLayer(captureSession)
{
VideoGravity = AVLayerVideoGravity.ResizeAspectFill,
Frame = Bounds
};
// create a device input and attach it to the session
AVCaptureDevice frontCameraDevice = MediaDevices.FrontCamera;
if (frontCameraDevice == null)
{
LoadErrors = "Cannot load camera";
return;
}
try
{
NSError error = null;
frontCameraDevice.LockForConfiguration(out error);
if (error != null)
{
Debug.WriteLine(error);
//throw new BusinessLogicException (ErrorCode.EC_UNDEFINED_ERROR, error.ToString());
//TODO: show error to user
}
frontCameraDevice.ActiveVideoMinFrameDuration = new CMTime(1, 15); // Configure for 15 FPS
}
finally
{
frontCameraDevice.UnlockForConfiguration();
}
AVCaptureDeviceInput inputDevice = AVCaptureDeviceInput.FromDevice(frontCameraDevice);
if (inputDevice == null)
{
LoadErrors = "Cannot access front camera";
return;
}
captureSession.AddInput(inputDevice);
NSError errorOut;
Layer.AddSublayer(_previewLayer);
captureSession.StartRunning();
}
public void SetupAndStartCaptureSession()
{
//Console.WriteLine ("SetupAndStartCapture Session");
// Create a shallow queue for buffers going to the display for preview.
previewBufferQueue = CMBufferQueue.CreateUnsorted(1);
// Create serial queue for movie writing
movieWritingQueue = new DispatchQueue("Movie Writing Queue");
if (captureSession == null)
{
SetupCaptureSession();
}
NSNotificationCenter.DefaultCenter.AddObserver(AVCaptureSession.DidStopRunningNotification, CaptureSessionStoppedRunningNotification, captureSession);
if (!captureSession.Running)
{
captureSession.StartRunning();
}
}
private void 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);
if (captureDevice == null)
{
RenderImageMessage("Capture device not found.");
return;
}
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
RenderImageMessage("No input device");
return;
}
session.AddInput(input);
// create a VideoDataOutput and add it to the sesion
AVVideoSettingsUncompressed settingUncomp = new AVVideoSettingsUncompressed();
settingUncomp.PixelFormatType = CVPixelFormatType.CV32BGRA;
var output = new AVCaptureVideoDataOutput()
{
UncompressedVideoSetting = settingUncomp,
// If you want to cap the frame rate at a given speed, in this sample: 15 frames per second
//MinFrameDuration = new CMTime (1, 15)
};
// configure the output
queue = new DispatchQueue("myQueue");
outputRecorder = new OutputRecorder(ImageView);
output.SetSampleBufferDelegateQueue(outputRecorder, queue);
session.AddOutput(output);
session.StartRunning();
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
var device = AVCaptureDevice.GetDefaultDevice(AVMediaTypes.Video);
if (device is null)
{
this.ShowAlert("无法访问相机", null);
return;
}
var input = AVCaptureDeviceInput.FromDevice(device);
if (input is null)
{
this.ShowAlert("无法访问相机", null);
return;
}
session.AddInput(input);
try
{
var output = new AVCaptureMetadataOutput();
output.SetDelegate(this, DispatchQueue.MainQueue);
session.AddOutput(output);
output.MetadataObjectTypes = AVMetadataObjectType.QRCode;
}
catch
{
return;
}
preview = AVCaptureVideoPreviewLayer.FromSession(session);
if (preview is null)
{
this.ShowAlert("无法显示扫描预览", null);
return;
}
preview.VideoGravity = AVLayerVideoGravity.Resize;
preview.Frame = View.Layer.Bounds;
View.Layer.AddSublayer(preview);
session.StartRunning();
codeFrame = new UIView();
codeFrame.Layer.BorderColor = UIColor.Green.CGColor;
codeFrame.Layer.BorderWidth = 2;
View.AddSubview(codeFrame);
View.BringSubviewToFront(codeFrame);
}
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
sessionQueue.DispatchAsync(() => {
switch (setupResult)
{
// Only setup observers and start the session running if setup succeeded.
case AVCamSetupResult.Success:
AddObservers();
session.StartRunning();
sessionRunning = session.Running;
break;
case AVCamSetupResult.CameraNotAuthorized:
DispatchQueue.MainQueue.DispatchAsync(() => {
var message = "AVCam doesn't have permission to use the camera, please change privacy settings";
var alertController = UIAlertController.Create("AVCam", message, UIAlertControllerStyle.Alert);
var cancelAction = UIAlertAction.Create("OK", UIAlertActionStyle.Cancel, null);
alertController.AddAction(cancelAction);
// Provide quick access to Settings.
alertController.AddAction(UIAlertAction.Create("Settings", UIAlertActionStyle.Default, action => {
UIApplication.SharedApplication.OpenUrl(new NSUrl(UIApplication.OpenSettingsUrlString), new NSDictionary(), null);
}));
PresentViewController(alertController, true, null);
});
break;
case AVCamSetupResult.SessionConfigurationFailed:
DispatchQueue.MainQueue.DispatchAsync(() => {
var message = "Unable to capture media";
var alertController = UIAlertController.Create("AVCam", message, UIAlertControllerStyle.Alert);
alertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Cancel, null));
PresentViewController(alertController, true, null);
});
break;
}
});
}
void Initialize()
{
Configuration.IsScanning = true;
SizeChange();
CaptureSession = new AVCaptureSession();
CaptureSession.BeginConfiguration();
this.Frame = new CGRect(0f, 0f, UIScreen.MainScreen.Bounds.Width, UIScreen.MainScreen.Bounds.Width);
previewLayer = new AVCaptureVideoPreviewLayer(CaptureSession)
{
Frame = new CGRect(0f, 0f, UIScreen.MainScreen.Bounds.Width, UIScreen.MainScreen.Bounds.Width),
VideoGravity = AVLayerVideoGravity.ResizeAspectFill,
};
setPreviewOrientation();
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.Preset640x480;
Layer.AddSublayer(previewLayer);
CaptureSession.CommitConfiguration();
CaptureSession.StartRunning();
VideoDataOutput = new AVCaptureVideoDataOutput();
VideoDataOutput.AlwaysDiscardsLateVideoFrames = true;
VideoDataOutput.WeakVideoSettings = new CVPixelBufferAttributes {
PixelFormatType = CVPixelFormatType.CV32BGRA
}.Dictionary;
captureVideoDelegate = new CaptureVideoDelegate();
captureVideoDelegate.OnDetected += (list) =>
{
this.OnDetected?.Invoke(list);
CaptureSession.StopRunning();
};
VideoDataOutput.SetSampleBufferDelegateQueue(captureVideoDelegate, CoreFoundation.DispatchQueue.MainQueue);
CaptureSession.AddOutput(VideoDataOutput);
}
void setupAVCapture()
{
session = new AVCaptureSession();
//AVCaptureSession.Notifications.ObserveRuntimeError((object sender, AVCaptureSessionRuntimeErrorEventArgs e) => {
// Console.WriteLine("AVCaptureSessionError"+e.Error);
//});
//AVCaptureSession.Notifications.ObserveWasInterrupted((object sender, NSNotificationEventArgs e) => {
// Console.WriteLine("Interrupted"+e.Notification);
//});
//AVCaptureSession.Notifications.ObserveInterruptionEnded((object sender, NSNotificationEventArgs e) => {
// Console.WriteLine("InterruptedEnded" + e.Notification);
//});
//AVCaptureSession.Notifications.ObserveDidStopRunning((object sender, NSNotificationEventArgs e) => {
// Console.WriteLine("DidStopRunning" + e.Notification);
//});
//AVCaptureSession.Notifications.ObserveDidStartRunning((object sender, NSNotificationEventArgs e) => {
// Console.WriteLine("DidStartRunning" + e.Notification);
//});
session.SessionPreset = AVCaptureSession.PresetHigh;
previewView.Session = session;
updateCameraSelection();
rootLayer = previewView.Layer;
rootLayer.MasksToBounds = true;
// HACK: Remove .ToString() for AVLayerVideoGravity
// (previewView.Layer as AVCaptureVideoPreviewLayer).VideoGravity = AVLayerVideoGravity.ResizeAspectFill.ToString();
(previewView.Layer as AVCaptureVideoPreviewLayer).VideoGravity = AVLayerVideoGravity.ResizeAspectFill;
previewView.Layer.BackgroundColor = UIColor.Black.CGColor;
setupAVFoundationFaceDetection();
setUpStilImage();
//setupVideoOutputCapture();
if (device != null)
{
//
device.AddObserver(this, (NSString)"videoZoomFactor", (NSKeyValueObservingOptions)0,
VideoZoomFactorContext);
device.AddObserver(this, (NSString)"rampingVideoZoom", (NSKeyValueObservingOptions)0,
VideoZoomRampingContext);
}
session.StartRunning();
}
/// <summary>
/// Creates a camera stream and adds it to the view
/// </summary>
private async Task SetupLiveCameraStream()
{
captureSession = new AVCaptureSession();
// SETUP THE PREVIEW OF THE CAPTURE SESSION
videoPreviewLayer = new AVCaptureVideoPreviewLayer(captureSession)
{
Frame = this.Frame
};
this.Layer.AddSublayer(videoPreviewLayer);
// SETUP THE INPUT DEVICE FOR THE SESSION
var captureDevice = AVCaptureDevice.GetDefaultDevice(AVMediaType.Video);
ConfigureCameraForDevice(captureDevice);
captureDeviceInput = AVCaptureDeviceInput.FromDevice(captureDevice);
captureSession.AddInput(captureDeviceInput);
// VIDEO OUTPUT BUFFERING METHOD
var output = new AVCaptureVideoDataOutput();
var settings = new AVVideoSettingsUncompressed
{
PixelFormatType = CVPixelFormatType.CV32BGRA
};
output.WeakVideoSettings = settings.Dictionary;
Queue = new DispatchQueue("ManCamQueue");
Recorder = new OutputRecorder(this, VideoFrameInterval);
Recorder.OnFrameRecieved += HandleVideFrameImage;
output.SetSampleBufferDelegate(Recorder, Queue);
captureSession.AddOutput(output);
// UI PREPERATION
AddTargetOverlay();
textOutputLabel = new UILabel(new CGRect(targetOverlayView.Frame.Width + 10, 10, 100, 100))
{
TextColor = UIColor.White,
Font = UIFont.BoldSystemFontOfSize(22)
};
this.AddSubview(textOutputLabel);
captureSession.StartRunning();
}
//-----------------------------------------------------------------------------------------------------------------------------------------------
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
switch (setupResult)
{
case AVCamSetupResult.Success:
session.StartRunning();
break;
}
Application.canRotate = true;
SetLayout(CGSize.Empty);
}
private void SetupLiveCameraStream()
{
_captureSession = new AVCaptureSession();
AVCaptureDevice captureDevice;
captureDevice = AVCaptureDevice.GetDefaultDevice(AVCaptureDeviceType.BuiltInDualCamera, AVMediaType.Video, AVCaptureDevicePosition.Back);
if (captureDevice == null)
{
captureDevice = AVCaptureDevice.GetDefaultDevice(AVMediaType.Video);
}
ConfigureCameraForDevice(captureDevice);
_captureDeviceInput = AVCaptureDeviceInput.FromDevice(captureDevice);
if (!_captureSession.CanAddInput(_captureDeviceInput))
{
return;
}
_capturePhotoOutput = new AVCapturePhotoOutput();
_capturePhotoOutput.IsHighResolutionCaptureEnabled = true;
_capturePhotoOutput.IsLivePhotoCaptureEnabled = false;
if (!_captureSession.CanAddOutput(_capturePhotoOutput))
{
return;
}
_captureSession.BeginConfiguration();
_captureSession.SessionPreset = AVCaptureSession.PresetPhoto;
_captureSession.AddInput(_captureDeviceInput);
_captureSession.AddOutput(_capturePhotoOutput);
_captureSession.CommitConfiguration();
_videoPreviewLayer = new AVCaptureVideoPreviewLayer(_captureSession)
{
Frame = liveCameraStream.Frame,
VideoGravity = AVLayerVideoGravity.ResizeAspectFill,
};
liveCameraStream.Layer.AddSublayer(_videoPreviewLayer);
_captureSession.StartRunning();
}
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();
}
public override void WindowDidLoad()
{
base.WindowDidLoad();
session = new AVCaptureSession() { SessionPreset = AVCaptureSession.PresetMedium };
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType(AVMediaType.Video);
var input = AVCaptureDeviceInput.FromDevice(captureDevice);
if (input == null)
{
Console.WriteLine("No input - this won't work on the simulator, try a physical device");
}
session.AddInput(input);
var captureVideoPreviewLayer = new AVCaptureVideoPreviewLayer(session);
var contentView = Window.ContentView;
contentView.WantsLayer = true;
captureVideoPreviewLayer.Frame = contentView.Bounds;
contentView.Layer.AddSublayer(captureVideoPreviewLayer);
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();
}
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);
if (captureDevice == null) {
Console.WriteLine ("No captureDevice - this won't work on the simulator, try a physical device");
return false;
}
//Configure for 15 FPS. Note use of LockForConigfuration()/UnlockForConfiguration()
NSError error = null;
captureDevice.LockForConfiguration (out error);
if (error != null) {
Console.WriteLine (error);
captureDevice.UnlockForConfiguration ();
return false;
}
if (UIDevice.CurrentDevice.CheckSystemVersion (7, 0))
captureDevice.ActiveVideoMinFrameDuration = new CMTime (1, 15);
captureDevice.UnlockForConfiguration ();
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;
}
session.AddInput (input);
// create a VideoDataOutput and add it to the sesion
var settings = new CVPixelBufferAttributes {
PixelFormatType = CVPixelFormatType.CV32BGRA
};
using (var output = new AVCaptureVideoDataOutput { WeakVideoSettings = settings.Dictionary }) {
queue = new DispatchQueue ("myQueue");
outputRecorder = new OutputRecorder ();
output.SetSampleBufferDelegate (outputRecorder, queue);
session.AddOutput (output);
}
session.StartRunning ();
return true;
}
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.PresetMedium
};
AVCaptureDevice captureDevice = null;
var videoDevices = AVCaptureDevice.DevicesWithMediaType (AVMediaType.Video);
foreach (AVCaptureDevice Device in videoDevices) {
if (Device.Position == AVCaptureDevicePosition.Front)
{
captureDevice = Device;
break;
}
}
// create a device input and attach it to the session
if(captureDevice==null){
captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
}
if (captureDevice == null){
return false;
}
//Configure for 15 FPS. Note use of LockForConigfuration()/UnlockForConfiguration()
NSError error = null;
captureDevice.LockForConfiguration(out error);
if(error != null)
{
captureDevice.UnlockForConfiguration();
return false;
}
if(UIDevice.CurrentDevice.CheckSystemVersion(7,0))
captureDevice.ActiveVideoMinFrameDuration = new CMTime (1,15);
captureDevice.UnlockForConfiguration();
var input = AVCaptureDeviceInput.FromDevice (captureDevice);
if (input == null){
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 MonoTouch.CoreFoundation.DispatchQueue ("myQueue");
outputRecorder = new OutputRecorder (_state);
output.SetSampleBufferDelegate (outputRecorder, queue);
session.AddOutput (output);
session.StartRunning ();
return true;
}
private void StartCameraWithCompletionHandler(Action<bool, NSError> completion)
{
captureSession = new AVCaptureSession ();
captureSession.BeginConfiguration ();
captureDevice = CameraDeviceForPosition (AVCaptureDevicePosition.Back);
if (captureDevice == null) {
string message = "Error message back camera - not found";
string title = "Error";
ShowErrorMessage (message, title);
return;
}
NSError error;
AVCaptureDeviceInput deviceInput = AVCaptureDeviceInput.FromDevice (captureDevice, out error);
if (deviceInput == null) {
Console.WriteLine ("This error should be handled appropriately in your app -- obtain device input: {0}", error);
string message = "Error message back camera - can't open.";
string title = "Error";
ShowErrorMessage (message, title);
return;
}
captureSession.AddInput (deviceInput);
stillImageOutput = new AVCaptureStillImageOutput ();
//Or instead of JPEG, we can use one of the following pixel formats: BGRA, 420f output
stillImageOutput.OutputSettings = new NSDictionary (AVVideo.CodecKey, AVVideo.CodecJPEG);
captureSession.AddOutput (stillImageOutput);
cameraPreviewView.ConfigureCaptureSession (captureSession, stillImageOutput);
captureSession.SessionPreset = AVCaptureSession.PresetPhoto;
captureDeviceFormat = captureDevice.ActiveFormat;
captureSession.CommitConfiguration ();
captureSession.StartRunning ();
maxBracketCount = stillImageOutput.MaxBracketedCaptureStillImageCount;
PrepareBracketsWithCompletionHandler (completion);
}
public bool StartRecording()
{
try
{
session = MaybeInitializeSession();
if (session == null)
{
Failure.Alert("Couldn't initialize session");
return false;
}
writer = MaybeInitializeAssetWriter();
if (writer == null)
{
Failure.Alert("Couldn't initialize writer");
return false;
}
inputWriter = MaybeInitializeInputWriter();
if (inputWriter == null)
{
Failure.Alert("Couldn't initialize input writer");
return false;
}
if (!writer.CanAddInput(inputWriter))
{
Failure.Alert("Couldn't add input writer to writer");
return false;
}
writer.AddInput(inputWriter);
session.StartRunning();
return true;
}
catch (Exception x)
{
Failure.Alert(x.Message);
return false;
}
}
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);
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;
}
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 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 ();
}
bool SetupCaptureSession()
{
session = new AVCaptureSession () {
SessionPreset = AVCaptureSession.PresetMedium
};
AVCaptureDevice[] capDevices = AVCaptureDevice.DevicesWithMediaType(AVMediaType.Video);
AVCaptureDeviceInput input = null;
if (capDevices.Length != 0) input = AVCaptureDeviceInput.FromDevice (capDevices[0]);
if (input == null){
new UIAlertView("Error", "Camera not available", null, "OK", null).Show();
Console.WriteLine ("Camera not available");
return false;
}
session.AddInput (input);
var output = new AVCaptureVideoDataOutput () {
VideoSettings = new AVVideoSettings (CVPixelFormatType.CV32BGRA),
MinFrameDuration = new CMTime (1, 30) //second parameter is frames per second
};
queue = new MonoTouch.CoreFoundation.DispatchQueue ("myQueue");
outputRecorder = new OutputRecorder ();
output.SetSampleBufferDelegateAndQueue (outputRecorder, queue);
session.AddOutput (output);
session.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.PresetMedium
};
// create a device input and attach it to the session
var captureDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
if (captureDevice == null) {
Image<Bgr, Byte> img = new Image<Bgr, byte> (512, 512, new Bgr (255, 255, 255));
CvInvoke.PutText (
img,
"Capture device not found.",
new Point (10, 200),
FontFace.HersheyComplex,
1,
new MCvScalar (),
2);
ImageView.Image = img.ToUIImage();
return false;
}
var input = AVCaptureDeviceInput.FromDevice (captureDevice);
if (input == null){
Console.WriteLine ("No input device");
return false;
}
session.AddInput (input);
// create a VideoDataOutput and add it to the sesion
AVVideoSettingsUncompressed settingUncomp = new AVVideoSettingsUncompressed();
settingUncomp.PixelFormatType = CVPixelFormatType.CV32BGRA;
var output = new AVCaptureVideoDataOutput () {
UncompressedVideoSetting = settingUncomp,
// If you want to cap the frame rate at a given speed, in this sample: 15 frames per second
//MinFrameDuration = new CMTime (1, 15)
};
// configure the output
queue = new DispatchQueue ("myQueue");
outputRecorder = new OutputRecorder (ImageView);
output.SetSampleBufferDelegateQueue(outputRecorder, queue);
session.AddOutput (output);
session.StartRunning ();
return true;
}
void SetupAVCapture (NSString sessionPreset)
{
if ((videoTextureCache = CVOpenGLESTextureCache.FromEAGLContext (context)) == null){
Console.WriteLine ("Could not create the CoreVideo TextureCache");
return;
}
session = new AVCaptureSession ();
session.BeginConfiguration ();
// Preset size
session.SessionPreset = sessionPreset;
// Input device
var videoDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
if (videoDevice == null){
Console.WriteLine ("No video device");
return;
}
NSError err;
var input = new AVCaptureDeviceInput (videoDevice, out err);
if (err != null){
Console.WriteLine ("Error creating video capture device");
return;
}
session.AddInput (input);
// Create the output device
var dataOutput = new AVCaptureVideoDataOutput () {
AlwaysDiscardsLateVideoFrames = true,
// YUV 420, use "BiPlanar" to split the Y and UV planes in two separate blocks of
// memory, then we can index 0 to get the Y and 1 for the UV planes in the frame decoding
VideoSettings = new AVVideoSettings (CVPixelFormatType.CV420YpCbCr8BiPlanarFullRange)
};
dataOutputDelegate = new DataOutputDelegate (this);
//
// This dispatches the video frames into the main thread, because the OpenGL
// code is accessing the data synchronously.
//
dataOutput.SetSampleBufferDelegateAndQueue (dataOutputDelegate, DispatchQueue.MainQueue);
session.AddOutput (dataOutput);
session.CommitConfiguration ();
session.StartRunning ();
}