// Note: This code was forked from https://github.com/dealrinc/cordova-gmv-barcode-scanner // ---------------------------------------------------------------------------- // | Imports // ---------------------------------------------------------------------------- @import AVFoundation; @import MLKitBarcodeScanning; @import MLKitVision; // ---------------------------------------------------------------------------- // | Header File Imports // ---------------------------------------------------------------------------- #import "CameraViewController.h" @interface CameraViewController () @property(nonatomic, weak) IBOutlet UIView *placeHolderView; @property(nonatomic, weak) IBOutlet UIView *overlayView; @property(nonatomic, strong) UIImageView *imageView; @property(nonatomic, strong) AVCaptureSession *session; @property(nonatomic, strong) AVCaptureVideoDataOutput *videoDataOutput; @property(nonatomic, strong) dispatch_queue_t videoDataOutputQueue; @property(nonatomic, strong) AVCaptureVideoPreviewLayer *previewLayer; @property(nonatomic, strong) MLKBarcodeScanner *barcodeScanner; @property(nonatomic, strong) UIButton *torchButton; @end @implementation CameraViewController @synthesize delegate; - (BOOL)prefersStatusBarHidden { return YES; } - (BOOL)prefersHomeIndicatorAutoHidden { return YES; } -(BOOL) shouldAutorotate { return NO; } -(NSUInteger)supportedInterfaceOrientations { return UIInterfaceOrientationMaskPortrait; } - (id)initWithCoder:(NSCoder *)aDecoder { self = [super initWithCoder:aDecoder]; if (self) { _videoDataOutputQueue = dispatch_queue_create("VideoDataOutputQueue", DISPATCH_QUEUE_SERIAL); } return self; } - (void)viewDidLoad { [super viewDidLoad]; //Force portrait orientation. if (@available(iOS 16.0, *)) { UIWindowScene *windowScene = self.view.window.windowScene; UIWindowSceneGeometryPreferencesIOS *preferences = [[UIWindowSceneGeometryPreferencesIOS alloc] initWithInterfaceOrientations:UIInterfaceOrientationMaskPortrait]; [windowScene requestGeometryUpdateWithPreferences:preferences errorHandler:^(NSError * _Nonnull error) { NSLog(@"Failed to change orientation %@", error); }]; } else { [[UIDevice currentDevice] setValue: [NSNumber numberWithInteger:UIInterfaceOrientationPortrait] forKey:@"orientation"]; } } - (void)viewDidLayoutSubviews { [super viewDidLayoutSubviews]; self.previewLayer.frame = self.view.layer.bounds; self.previewLayer.position = CGPointMake(CGRectGetMidX(self.previewLayer.frame), CGRectGetMidY(self.previewLayer.frame)); } - (void)viewDidUnload { [self cleanupCaptureSession]; [super viewDidUnload]; } - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; // Set up camera. self.session = [[AVCaptureSession alloc] init]; self.session.sessionPreset = AVCaptureSessionPresetHigh; _videoDataOutputQueue = dispatch_queue_create("VideoDataOutputQueue", DISPATCH_QUEUE_SERIAL); [self updateCameraSelection]; // Set up video processing pipeline. [self setUpVideoProcessing]; // Set up camera preview. [self setUpCameraPreview]; //Parse Cordova settings. NSNumber *formats = 0; //If barcodeFormats == 0 then process as a VIN with VIN verifications. if([_barcodeFormats isEqual: @0]) { NSLog(@"Running VIN style"); formats = @(MLKBarcodeFormatCode39|MLKBarcodeFormatDataMatrix); } else { formats = _barcodeFormats; } NSLog(@"_barcodeFormats %@, %@", _barcodeFormats, formats); // Initialize barcode detector. MLKBarcodeScannerOptions *options = [[MLKBarcodeScannerOptions alloc] initWithFormats: [formats intValue]]; self.barcodeScanner = [MLKBarcodeScanner barcodeScannerWithOptions:options]; [self.session startRunning]; } - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; [self.session stopRunning]; } #pragma mark - imageOrientationFromDeviceOrientation - (UIImageOrientation) imageOrientationFromDeviceOrientation:(UIDeviceOrientation)deviceOrientation cameraPosition:(AVCaptureDevicePosition)cameraPosition { switch (deviceOrientation) { case UIDeviceOrientationPortrait: return cameraPosition == AVCaptureDevicePositionFront ? UIImageOrientationLeftMirrored : UIImageOrientationRight; case UIDeviceOrientationLandscapeLeft: return cameraPosition == AVCaptureDevicePositionFront ? UIImageOrientationDownMirrored : UIImageOrientationUp; case UIDeviceOrientationPortraitUpsideDown: return cameraPosition == AVCaptureDevicePositionFront ? UIImageOrientationRightMirrored : UIImageOrientationLeft; case UIDeviceOrientationLandscapeRight: return cameraPosition == AVCaptureDevicePositionFront ? UIImageOrientationUpMirrored : UIImageOrientationDown; case UIDeviceOrientationUnknown: case UIDeviceOrientationFaceUp: case UIDeviceOrientationFaceDown: return UIImageOrientationUp; } } #pragma mark - AVCaptureVideoDataOutputSampleBufferDelegate - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection { MLKVisionImage *image = [[MLKVisionImage alloc] initWithBuffer:sampleBuffer]; AVCaptureDevicePosition cameraPosition = AVCaptureDevicePositionBack; // Set to the capture device you used. image.orientation = [self imageOrientationFromDeviceOrientation:UIDevice.currentDevice.orientation cameraPosition:cameraPosition]; [self.barcodeScanner processImage:image completion:^(NSArray *barcodes, NSError *error) { if (error != nil) { return; } if (barcodes != nil) { for (MLKBarcode *barcode in barcodes) { NSLog(@"Barcode value: %@", barcode.rawValue); [self cleanupCaptureSession]; [_session stopRunning]; [delegate sendResult:barcode.rawValue]; break; } } }]; } #pragma mark - Camera setup - (void)cleanupVideoProcessing { if (self.videoDataOutput) { [self.session removeOutput:self.videoDataOutput]; } self.videoDataOutput = nil; } - (void)cleanupCaptureSession { [self.session stopRunning]; [self cleanupVideoProcessing]; self.session = nil; [self.previewLayer removeFromSuperlayer]; } - (void)setUpVideoProcessing { self.videoDataOutput = [[AVCaptureVideoDataOutput alloc] init]; NSDictionary *rgbOutputSettings = @{ (__bridge NSString*)kCVPixelBufferPixelFormatTypeKey : @(kCVPixelFormatType_32BGRA) }; [self.videoDataOutput setVideoSettings:rgbOutputSettings]; if (![self.session canAddOutput:self.videoDataOutput]) { [self cleanupVideoProcessing]; NSLog(@"Failed to setup video output"); return; } [self.videoDataOutput setAlwaysDiscardsLateVideoFrames:YES]; [self.videoDataOutput setSampleBufferDelegate:self queue:self.videoDataOutputQueue]; [self.session addOutput:self.videoDataOutput]; } - (void)setUpCameraPreview { self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session]; [self.previewLayer setBackgroundColor:[UIColor blackColor].CGColor]; [self.previewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill]; self.previewLayer.frame = self.view.superview.bounds; [self.view.layer addSublayer:self.previewLayer]; CGRect screenRect = [[UIScreen mainScreen] bounds]; CGFloat screenWidth = screenRect.size.width; CGFloat screenHeight = screenRect.size.height; CGFloat frameWidth = screenWidth*_scanAreaWidth; CGFloat frameHeight = screenHeight*_scanAreaHeight; UILabel* verticalLine = [[UILabel alloc] init]; verticalLine.frame = CGRectMake(screenWidth/2, 5, 1, screenHeight-10); verticalLine.layer.masksToBounds = NO; verticalLine.layer.cornerRadius = 0; verticalLine.userInteractionEnabled = YES; verticalLine.layer.borderColor = [UIColor redColor].CGColor; verticalLine.layer.borderWidth = 0.5; UILabel* horizontalLine = [[UILabel alloc] init]; horizontalLine.frame = CGRectMake(5, screenHeight/2, screenWidth-10, 1); horizontalLine.layer.masksToBounds = NO; horizontalLine.layer.cornerRadius = 0; horizontalLine.userInteractionEnabled = YES; horizontalLine.layer.borderColor = [UIColor redColor].CGColor; horizontalLine.layer.borderWidth = 0.5; UITapGestureRecognizer* tapScanner = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(focusAtPoint:)]; [verticalLine addGestureRecognizer:tapScanner]; [horizontalLine addGestureRecognizer:tapScanner]; CGFloat buttonSize = 45.0; UIButton *_cancelButton = [[UIButton alloc] init]; [_cancelButton addTarget:self action:@selector(closeView:) forControlEvents:UIControlEventTouchUpInside]; NSString * cancelBase64String = @"data:image/png;base64,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"; NSURL *cancelImageUrl = [NSURL URLWithString:cancelBase64String]; NSData *cancelImageData = [NSData dataWithContentsOfURL:cancelImageUrl]; UIImage *cancelIcon = [UIImage imageWithData:cancelImageData]; [_cancelButton setImage:cancelIcon forState:UIControlStateNormal]; CGFloat screenOffset = (screenWidth/2 - frameWidth/2)/2 - buttonSize/2; NSLog(@"screenOffset %f", screenOffset); _cancelButton.frame = CGRectMake(screenOffset, screenHeight-screenOffset-buttonSize, buttonSize, buttonSize); _cancelButton.backgroundColor = [UIColor colorWithWhite:1 alpha:0.4]; _cancelButton.transform=CGAffineTransformMakeRotation(M_PI / 2); _cancelButton.layer.cornerRadius = buttonSize/2; _cancelButton.contentEdgeInsets = UIEdgeInsetsMake(15, 15, 15, 15); [self.view addSubview:_cancelButton]; self.torchButton = [[UIButton alloc] init]; [self.torchButton addTarget:self action:@selector(toggleFlashlight:) forControlEvents:UIControlEventTouchUpInside]; NSString * torchBase64String = @"data:image/png;base64,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"; NSURL *torchImageUrl = [NSURL URLWithString:torchBase64String]; NSData *torchImageData = [NSData dataWithContentsOfURL:torchImageUrl]; UIImage *torchIcon = [UIImage imageWithData:torchImageData]; [self.torchButton setImage:torchIcon forState:UIControlStateNormal]; self.torchButton.frame = CGRectMake(screenWidth-screenOffset-buttonSize, screenHeight-screenOffset-buttonSize, buttonSize, buttonSize); self.torchButton.backgroundColor = [UIColor colorWithWhite:1 alpha:0.4]; self.torchButton.transform=CGAffineTransformMakeRotation(M_PI / 2); self.torchButton.layer.cornerRadius = buttonSize/2; self.torchButton.contentEdgeInsets = UIEdgeInsetsMake(10, 10, 10, 10); [self.view addSubview:self.torchButton]; [self.view addSubview:verticalLine]; [self.view addSubview:horizontalLine]; self.imageView = [[UIImageView alloc] initWithImage:nil]; UIView *catView = [[UIView alloc] initWithFrame:CGRectMake(0,0,frameWidth,frameHeight)]; self.imageView.frame = catView.bounds; // add the imageview to the superview [catView addSubview:self.imageView]; //add the view to the main view [self.view addSubview:catView]; } #pragma mark - Helper Functions - (void)focusAtPoint:(id) sender{ NSLog(@"captured touch"); CGPoint touchPoint = [(UITapGestureRecognizer*)sender locationInView:self.view]; double focus_x = touchPoint.x/self.previewLayer.frame.size.width; double focus_y = (touchPoint.y+66)/self.previewLayer.frame.size.height; NSError *error; NSArray *devices = [AVCaptureDevice devices]; for (AVCaptureDevice *device in devices){ NSLog(@"Device name: %@", [device localizedName]); if ([device hasMediaType:AVMediaTypeVideo]) { if ([device position] == AVCaptureDevicePositionBack) { NSLog(@"Device position : back"); CGPoint point = CGPointMake(focus_y, 1-focus_x); if ([device isFocusModeSupported:AVCaptureFocusModeContinuousAutoFocus] && [device lockForConfiguration:&error]){ [device setFocusPointOfInterest:point]; for (UIView *subView in self.view.subviews) { if (subView.tag == 99) { [subView removeFromSuperview]; } } CGRect rect = CGRectMake(touchPoint.x-30, touchPoint.y-30, 60, 60); UIView *focusRect = [[UIView alloc] initWithFrame:rect]; focusRect.layer.borderColor = [UIColor colorWithRed:0.98 green:0.80 blue:0.18 alpha:.7].CGColor; focusRect.layer.borderWidth = 1; focusRect.tag = 99; [self.view addSubview:focusRect]; dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 1 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{ [focusRect removeFromSuperview]; }); [device setFocusMode:AVCaptureFocusModeAutoFocus]; [device unlockForConfiguration]; } } } } } static inline double radians (double degrees) {return degrees * M_PI/180;} - (UIImage*) rotateImage:(UIImage*)src toOrientation:(UIImageOrientation) orientation { UIGraphicsBeginImageContext(src.size); CGContextRef context = UIGraphicsGetCurrentContext(); if (orientation == UIImageOrientationRight) { CGContextRotateCTM (context, radians(90)); } else if (orientation == UIImageOrientationLeft) { CGContextRotateCTM (context, radians(-90)); } else if (orientation == UIImageOrientationDown) { // NOTHING } else if (orientation == UIImageOrientationUp) { CGContextRotateCTM (context, radians(90)); } [src drawAtPoint:CGPointMake(0, 0)]; UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return image; } - (UIImage *)croppIngimageByImageName:(UIImage *)imageToCrop toRect:(CGRect)rect { //CGRect CropRect = CGRectMake(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height+15); CGImageRef imageRef = CGImageCreateWithImageInRect([imageToCrop CGImage], rect); UIImage *cropped = [UIImage imageWithCGImage:imageRef]; CGImageRelease(imageRef); return cropped; } - (void) toggleFlashlight:(id)sender { // check if flashlight available Class captureDeviceClass = NSClassFromString(@"AVCaptureDevice"); if (captureDeviceClass != nil) { AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if ([device hasTorch] && [device hasFlash]){ [device lockForConfiguration:nil]; if (device.torchMode == AVCaptureTorchModeOff) { self.torchButton.backgroundColor = [UIColor colorWithWhite:1 alpha:1]; [device setTorchMode:AVCaptureTorchModeOn]; [device setFlashMode:AVCaptureFlashModeOn]; //torchIsOn = YES; } else { self.torchButton.backgroundColor = [UIColor colorWithWhite:1 alpha:.4]; [device setTorchMode:AVCaptureTorchModeOff]; [device setFlashMode:AVCaptureFlashModeOff]; // torchIsOn = NO; } [device unlockForConfiguration]; } } } - (void) closeView :(id)sender{ [ self cleanupCaptureSession]; [_session stopRunning]; [delegate closeScanner]; } - (void)updateCameraSelection { [self.session beginConfiguration]; // Remove old inputs NSArray *oldInputs = [self.session inputs]; for (AVCaptureInput *oldInput in oldInputs) { [self.session removeInput:oldInput]; } AVCaptureDevicePosition desiredPosition = AVCaptureDevicePositionBack; AVCaptureDeviceInput *input = [self captureDeviceInputForPosition:desiredPosition]; if (!input) { // Failed, restore old inputs for (AVCaptureInput *oldInput in oldInputs) { [self.session addInput:oldInput]; } } else { // Succeeded, set input and update connection states [self.session addInput:input]; } [self.session commitConfiguration]; } - (AVCaptureDeviceInput *)captureDeviceInputForPosition:(AVCaptureDevicePosition)desiredPosition { for (AVCaptureDevice *device in [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) { if (device.position == desiredPosition) { NSError *error = nil; AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error]; if (error) { NSLog(@"Could not initialize for AVMediaTypeVideo for device %@", device); } else if ([self.session canAddInput:input]) { return input; } } } return nil; } @end