//------------------------------------------------------------------------ // Copyright 2010 (c) Jeff Brown // // This file is part of the ZBar Bar Code Reader. // // The ZBar Bar Code Reader is free software; you can redistribute it // and/or modify it under the terms of the GNU Lesser Public License as // published by the Free Software Foundation; either version 2.1 of // the License, or (at your option) any later version. // // The ZBar Bar Code Reader is distributed in the hope that it will be // useful, but WITHOUT ANY WARRANTY; without even the implied warranty // of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Lesser Public License for more details. // // You should have received a copy of the GNU Lesser Public License // along with the ZBar Bar Code Reader; if not, write to the Free // Software Foundation, Inc., 51 Franklin St, Fifth Floor, // Boston, MA 02110-1301 USA // // http://sourceforge.net/projects/zbar //------------------------------------------------------------------------ #import #import #import #import #import #define MODULE ZBarReaderViewController #import "debug.h" static inline AVCaptureDevicePosition AVPositionForUICamera (UIImagePickerControllerCameraDevice camera) { switch(camera) { case UIImagePickerControllerCameraDeviceRear: return(AVCaptureDevicePositionBack); case UIImagePickerControllerCameraDeviceFront: return(AVCaptureDevicePositionFront); } return(-1); } static inline UIImagePickerControllerCameraDevice UICameraForAVPosition (AVCaptureDevicePosition position) { switch(position) { case AVCaptureDevicePositionBack: return(UIImagePickerControllerCameraDeviceRear); case AVCaptureDevicePositionFront: return(UIImagePickerControllerCameraDeviceFront); } return(-1); } static inline AVCaptureDevice* AVDeviceForUICamera (UIImagePickerControllerCameraDevice camera) { AVCaptureDevicePosition position = AVPositionForUICamera(camera); if(position < 0) return(nil); #if !TARGET_IPHONE_SIMULATOR NSArray *allDevices = [AVCaptureDevice devicesWithMediaType: AVMediaTypeVideo]; for(AVCaptureDevice *device in allDevices) // FIXME how to quantify "best" of several (theoretical) possibilities if(device.position == position) return(device); #endif return(nil); } static inline AVCaptureTorchMode AVTorchModeForUIFlashMode (UIImagePickerControllerCameraFlashMode mode) { switch(mode) { case UIImagePickerControllerCameraFlashModeAuto: return(AVCaptureTorchModeAuto); case UIImagePickerControllerCameraFlashModeOn: return(AVCaptureTorchModeOn); case UIImagePickerControllerCameraFlashModeOff: break; } return(AVCaptureTorchModeOff); } static inline NSString* AVSessionPresetForUIVideoQuality (UIImagePickerControllerQualityType quality) { #if !TARGET_IPHONE_SIMULATOR switch(quality) { case UIImagePickerControllerQualityTypeHigh: return(AVCaptureSessionPresetHigh); case UIImagePickerControllerQualityType640x480: return(AVCaptureSessionPreset640x480); case UIImagePickerControllerQualityTypeMedium: return(AVCaptureSessionPresetMedium); case UIImagePickerControllerQualityTypeLow: return(AVCaptureSessionPresetLow); case UIImagePickerControllerQualityTypeIFrame1280x720: return(AVCaptureSessionPresetiFrame1280x720); case UIImagePickerControllerQualityTypeIFrame960x540: return(AVCaptureSessionPresetiFrame960x540); } #endif return(nil); } @implementation ZBarReaderViewController @synthesize scanner, readerDelegate, showsZBarControls, supportedOrientationsMask, tracksSymbols, enableCache, cameraOverlayView, cameraViewTransform, cameraDevice, cameraFlashMode, videoQuality, readerView, scanCrop; @dynamic sourceType, allowsEditing, allowsImageEditing, showsCameraControls, showsHelpOnFail, cameraMode, takesPicture, maxScanDimension; + (BOOL) isSourceTypeAvailable: (UIImagePickerControllerSourceType) sourceType { if(sourceType != UIImagePickerControllerSourceTypeCamera) return(NO); return(TARGET_IPHONE_SIMULATOR || [UIImagePickerController isSourceTypeAvailable: sourceType]); } + (BOOL) isCameraDeviceAvailable: (UIImagePickerControllerCameraDevice) camera { return(TARGET_IPHONE_SIMULATOR || [UIImagePickerController isCameraDeviceAvailable: camera]); } + (BOOL) isFlashAvailableForCameraDevice: (UIImagePickerControllerCameraDevice) camera { return(TARGET_IPHONE_SIMULATOR || [UIImagePickerController isFlashAvailableForCameraDevice: camera]); } + (NSArray*) availableCaptureModesForCameraDevice: (UIImagePickerControllerCameraDevice) camera { if(![self isCameraDeviceAvailable: camera]) return([NSArray array]); // current reader only supports automatic detection return([NSArray arrayWithObject: [NSNumber numberWithInteger: UIImagePickerControllerCameraCaptureModeVideo]]); } - (void) _init { supportedOrientationsMask = ZBarOrientationMask(UIInterfaceOrientationPortrait); showsZBarControls = tracksSymbols = enableCache = YES; scanCrop = CGRectMake(0, 0, 1, 1); cameraViewTransform = CGAffineTransformIdentity; cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto; videoQuality = UIImagePickerControllerQualityType640x480; AVCaptureDevice *device = nil; #if !TARGET_IPHONE_SIMULATOR device = [AVCaptureDevice defaultDeviceWithMediaType: AVMediaTypeVideo]; #endif if(device) cameraDevice = UICameraForAVPosition(device.position); else cameraDevice = UIImagePickerControllerCameraDeviceRear; // create our own scanner to store configuration, // independent of whether view is loaded scanner = [ZBarImageScanner new]; [scanner setSymbology: 0 config: ZBAR_CFG_X_DENSITY to: 3]; [scanner setSymbology: 0 config: ZBAR_CFG_Y_DENSITY to: 3]; } - (id) init { if(!TARGET_IPHONE_SIMULATOR && !NSClassFromString(@"AVCaptureSession")) { // fallback to old interface zlog(@"Falling back to ZBarReaderController"); [self release]; return((id)[ZBarReaderController new]); } self = [super init]; if(!self) return(nil); self.wantsFullScreenLayout = YES; [self _init]; return(self); } - (id) initWithCoder: (NSCoder*) decoder { self = [super initWithCoder: decoder]; if(!self) return(nil); [self _init]; return(self); } - (void) cleanup { [cameraOverlayView removeFromSuperview]; cameraSim.readerView = nil; [cameraSim release]; cameraSim = nil; readerView.readerDelegate = nil; [readerView release]; readerView = nil; [controls release]; controls = nil; [shutter release]; shutter = nil; } - (void) dealloc { [self cleanup]; [cameraOverlayView release]; cameraOverlayView = nil; [scanner release]; scanner = nil; [super dealloc]; } - (void) initControls { if(!showsZBarControls && controls) { [controls removeFromSuperview]; [controls release]; controls = nil; } if(!showsZBarControls) return; UIView *view = self.view; if(controls) { assert(controls.superview == view); [view bringSubviewToFront: controls]; return; } CGRect r = view.bounds; r.origin.y = r.size.height - 54; r.size.height = 54; controls = [[UIView alloc] initWithFrame: r]; controls.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleTopMargin; controls.backgroundColor = [UIColor blackColor]; UIToolbar *toolbar = [UIToolbar new]; r.origin.y = 0; toolbar.frame = r; toolbar.barStyle = UIBarStyleBlackOpaque; toolbar.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; UIButton *info = [UIButton buttonWithType: UIButtonTypeInfoLight]; [info addTarget: self action: @selector(info) forControlEvents: UIControlEventTouchUpInside]; toolbar.items = [NSArray arrayWithObjects: [[[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemCancel target: self action: @selector(cancel)] autorelease], [[[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target: nil action: nil] autorelease], [[[UIBarButtonItem alloc] initWithCustomView: info] autorelease], nil]; [controls addSubview: toolbar]; [toolbar release]; [view addSubview: controls]; } - (void) initVideoQuality { if(!readerView) { assert(0); return; } AVCaptureSession *session = readerView.session; NSString *preset = AVSessionPresetForUIVideoQuality(videoQuality); if(session && preset && [session canSetSessionPreset: preset]) { zlog(@"set session preset=%@", preset); session.sessionPreset = preset; } else zlog(@"unable to set session preset=%@", preset); } - (void) loadView { self.view = [[UIView alloc] initWithFrame: CGRectMake(0, 0, 320, 480)]; } - (void) viewDidLoad { [super viewDidLoad]; UIView *view = self.view; view.backgroundColor = [UIColor blackColor]; view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; readerView = [[ZBarReaderView alloc] initWithImageScanner: scanner]; CGRect bounds = view.bounds; CGRect r = bounds; NSUInteger autoresize = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; if(showsZBarControls || self.parentViewController.modalViewController == self) { autoresize |= UIViewAutoresizingFlexibleBottomMargin; r.size.height -= 54; } readerView.frame = r; readerView.autoresizingMask = autoresize; AVCaptureDevice *device = AVDeviceForUICamera(cameraDevice); if(device && device != readerView.device) readerView.device = device; readerView.torchMode = AVTorchModeForUIFlashMode(cameraFlashMode); [self initVideoQuality]; readerView.readerDelegate = (id)self; readerView.scanCrop = scanCrop; readerView.previewTransform = cameraViewTransform; readerView.tracksSymbols = tracksSymbols; readerView.enableCache = enableCache; [view addSubview: readerView]; shutter = [[UIView alloc] initWithFrame: r]; shutter.backgroundColor = [UIColor blackColor]; shutter.opaque = NO; shutter.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; [view addSubview: shutter]; if(cameraOverlayView) { assert(!cameraOverlayView.superview); [cameraOverlayView removeFromSuperview]; [view addSubview: cameraOverlayView]; } [self initControls]; if(TARGET_IPHONE_SIMULATOR) { cameraSim = [[ZBarCameraSimulator alloc] initWithViewController: self]; cameraSim.readerView = readerView; } } - (void) viewDidUnload { [cameraOverlayView removeFromSuperview]; [self cleanup]; [super viewDidUnload]; } - (void) viewWillAppear: (BOOL) animated { zlog(@"willAppear: anim=%d orient=%d", animated, self.interfaceOrientation); [self initControls]; [super viewWillAppear: animated]; [readerView willRotateToInterfaceOrientation: self.interfaceOrientation duration: 0]; [readerView performSelector: @selector(start) withObject: nil afterDelay: .001]; shutter.alpha = 1; shutter.hidden = NO; UIApplication *app = [UIApplication sharedApplication]; BOOL willHideStatusBar = !didHideStatusBar && self.wantsFullScreenLayout && !app.statusBarHidden; if(willHideStatusBar) [app setStatusBarHidden: YES withAnimation: UIStatusBarAnimationFade]; didHideStatusBar = didHideStatusBar || willHideStatusBar; } - (void) dismissModalViewControllerAnimated: (BOOL) animated { if(didHideStatusBar) { [[UIApplication sharedApplication] setStatusBarHidden: NO withAnimation: UIStatusBarAnimationFade]; didHideStatusBar = NO; } [super dismissModalViewControllerAnimated: animated]; } - (void) viewWillDisappear: (BOOL) animated { readerView.captureReader.enableReader = NO; if(didHideStatusBar) { [[UIApplication sharedApplication] setStatusBarHidden: NO withAnimation: UIStatusBarAnimationFade]; didHideStatusBar = NO; } [super viewWillDisappear: animated]; } - (void) viewDidDisappear: (BOOL) animated { // stopRunning can take a really long time (>1s observed), // so defer until the view transitions are complete [readerView stop]; } - (BOOL) shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation) orient { return((supportedOrientationsMask >> orient) & 1); } - (void) willRotateToInterfaceOrientation: (UIInterfaceOrientation) orient duration: (NSTimeInterval) duration { zlog(@"willRotate: orient=%d #%g", orient, duration); rotating = YES; if(readerView) [readerView willRotateToInterfaceOrientation: orient duration: duration]; } - (void) willAnimateRotationToInterfaceOrientation: (UIInterfaceOrientation) orient duration: (NSTimeInterval) duration { zlog(@"willAnimateRotation: orient=%d #%g", orient, duration); if(helpController) [helpController willAnimateRotationToInterfaceOrientation: orient duration: duration]; if(readerView) [readerView setNeedsLayout]; } - (void) didRotateFromInterfaceOrientation: (UIInterfaceOrientation) orient { zlog(@"didRotate(%d): orient=%d", rotating, orient); if(!rotating && readerView) { // work around UITabBarController bug: willRotate is not called // for non-portrait initial interface orientation [readerView willRotateToInterfaceOrientation: self.interfaceOrientation duration: 0]; [readerView setNeedsLayout]; } rotating = NO; } - (ZBarReaderView*) readerView { // force view to load (void)self.view; assert(readerView); return(readerView); } - (void) setTracksSymbols: (BOOL) track { tracksSymbols = track; if(readerView) readerView.tracksSymbols = track; } - (void) setEnableCache: (BOOL) enable { enableCache = enable; if(readerView) readerView.enableCache = enable; } - (void) setScanCrop: (CGRect) r { scanCrop = r; if(readerView) readerView.scanCrop = r; } - (void) setCameraOverlayView: (UIView*) newview { UIView *oldview = cameraOverlayView; [oldview removeFromSuperview]; cameraOverlayView = [newview retain]; if([self isViewLoaded] && newview) [self.view addSubview: newview]; [oldview release]; } - (void) setCameraViewTransform: (CGAffineTransform) xfrm { cameraViewTransform = xfrm; if(readerView) readerView.previewTransform = xfrm; } - (void) cancel { if(!readerDelegate) return; SEL cb = @selector(imagePickerControllerDidCancel:); if([readerDelegate respondsToSelector: cb]) [readerDelegate imagePickerControllerDidCancel: (UIImagePickerController*)self]; else [self dismissModalViewControllerAnimated: YES]; } - (void) info { [self showHelpWithReason: @"INFO"]; } - (void) showHelpWithReason: (NSString*) reason { if(helpController) return; helpController = [[ZBarHelpController alloc] initWithReason: reason]; helpController.delegate = (id)self; helpController.wantsFullScreenLayout = YES; UIView *helpView = helpController.view; helpView.alpha = 0; helpView.frame = self.view.bounds; [helpController viewWillAppear: YES]; [self.view addSubview: helpView]; [UIView beginAnimations: @"ZBarHelp" context: nil]; helpController.view.alpha = 1; [UIView commitAnimations]; } - (void) takePicture { if(TARGET_IPHONE_SIMULATOR) { [cameraSim takePicture]; // FIXME return selected image } else if(readerView) [readerView.captureReader captureFrame]; } - (void) setCameraDevice: (UIImagePickerControllerCameraDevice) camera { cameraDevice = camera; if(readerView) { AVCaptureDevice *device = AVDeviceForUICamera(camera); if(device) readerView.device = device; } } - (void) setCameraFlashMode: (UIImagePickerControllerCameraFlashMode) mode { cameraFlashMode = mode; if(readerView) readerView.torchMode = AVTorchModeForUIFlashMode(mode); } - (UIImagePickerControllerCameraCaptureMode) cameraCaptureMode { return(UIImagePickerControllerCameraCaptureModeVideo); } - (void) setCameraCaptureMode: (UIImagePickerControllerCameraCaptureMode) mode { NSAssert2(mode == UIImagePickerControllerCameraCaptureModeVideo, @"attempt to set unsupported value (%d)" @" for %@ property", mode, @"cameraCaptureMode"); } - (void) setVideoQuality: (UIImagePickerControllerQualityType) quality { videoQuality = quality; if(readerView) [self initVideoQuality]; } // ZBarHelpDelegate - (void) helpControllerDidFinish: (ZBarHelpController*) help { assert(help == helpController); [help viewWillDisappear: YES]; [UIView beginAnimations: @"ZBarHelp" context: NULL]; [UIView setAnimationDelegate: self]; [UIView setAnimationDidStopSelector: @selector(removeHelp:done:context:)]; help.view.alpha = 0; [UIView commitAnimations]; } - (void) removeHelp: (NSString*) tag done: (NSNumber*) done context: (void*) ctx { if([tag isEqualToString: @"ZBarHelp"] && helpController) { [helpController.view removeFromSuperview]; [helpController release]; helpController = nil; } } // ZBarReaderViewDelegate - (void) readerView: (ZBarReaderView*) readerView didReadSymbols: (ZBarSymbolSet*) syms fromImage: (UIImage*) image { [readerDelegate imagePickerController: (UIImagePickerController*)self didFinishPickingMediaWithInfo: [NSDictionary dictionaryWithObjectsAndKeys: image, UIImagePickerControllerOriginalImage, syms, ZBarReaderControllerResults, nil]]; } - (void) readerViewDidStart: (ZBarReaderView*) readerView { if(!shutter.hidden) [UIView animateWithDuration: .25 animations: ^{ shutter.alpha = 0; } completion: ^(BOOL finished) { shutter.hidden = YES; }]; } // "deprecated" properties #define DEPRECATED_PROPERTY(getter, setter, type, val, ignore) \ - (type) getter \ { \ return(val); \ } \ - (void) setter: (type) v \ { \ NSAssert2(ignore || v == val, \ @"attempt to set unsupported value (%d)" \ @" for %@ property", val, @#getter); \ } DEPRECATED_PROPERTY(sourceType, setSourceType, UIImagePickerControllerSourceType, UIImagePickerControllerSourceTypeCamera, NO) DEPRECATED_PROPERTY(allowsEditing, setAllowsEditing, BOOL, NO, NO) DEPRECATED_PROPERTY(allowsImageEditing, setAllowsImageEditing, BOOL, NO, NO) DEPRECATED_PROPERTY(showsCameraControls, setShowsCameraControls, BOOL, NO, NO) DEPRECATED_PROPERTY(showsHelpOnFail, setShowsHelpOnFail, BOOL, NO, YES) DEPRECATED_PROPERTY(cameraMode, setCameraMode, ZBarReaderControllerCameraMode, ZBarReaderControllerCameraModeSampling, NO) DEPRECATED_PROPERTY(takesPicture, setTakesPicture, BOOL, NO, NO) DEPRECATED_PROPERTY(maxScanDimension, setMaxScanDimension, NSInteger, 640, YES) @end