112 lines
3.7 KiB
Objective-C
112 lines
3.7 KiB
Objective-C
//------------------------------------------------------------------------
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// Copyright 2010 (c) Jeff Brown <spadix@users.sourceforge.net>
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//
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// This file is part of the ZBar Bar Code Reader.
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//
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// The ZBar Bar Code Reader is free software; you can redistribute it
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// and/or modify it under the terms of the GNU Lesser Public License as
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// published by the Free Software Foundation; either version 2.1 of
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// the License, or (at your option) any later version.
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//
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// The ZBar Bar Code Reader is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser Public License for more details.
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//
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// You should have received a copy of the GNU Lesser Public License
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// along with the ZBar Bar Code Reader; if not, write to the Free
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// Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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// Boston, MA 02110-1301 USA
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//
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// http://sourceforge.net/projects/zbar
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//------------------------------------------------------------------------
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#import <CoreGraphics/CoreGraphics.h>
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#import "ZBarImageScanner.h"
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@class AVCaptureVideoDataOutput, AVCaptureOutput;
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@class ZBarCaptureReader, ZBarCVImage;
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@protocol ZBarCaptureDelegate <NSObject>
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// called when a new barcode is detected. the image refers to the
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// video buffer and must not be retained for long
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- (void) captureReader: (ZBarCaptureReader*) captureReader
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didReadNewSymbolsFromImage: (ZBarImage*) image;
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@optional
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// called when a potential/uncertain barcode is detected. will also
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// be called *after* captureReader:didReadNewSymbolsFromImage:
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// when good barcodes are detected
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- (void) captureReader: (ZBarCaptureReader*) captureReader
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didTrackSymbols: (ZBarSymbolSet*) symbols;
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@end
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@interface ZBarCaptureReader
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: NSObject
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{
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#if !TARGET_IPHONE_SIMULATOR
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AVCaptureVideoDataOutput *captureOutput;
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id<ZBarCaptureDelegate> captureDelegate;
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ZBarImageScanner *scanner;
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CGRect scanCrop;
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CGSize size;
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CGFloat framesPerSecond;
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BOOL enableCache;
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dispatch_queue_t queue;
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ZBarImage *image;
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ZBarCVImage *result;
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volatile uint32_t state;
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int framecnt;
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unsigned width, height;
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uint64_t t_frame, t_fps, t_scan;
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CGFloat dt_frame;
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#endif
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}
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// supply a pre-configured image scanner
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- (id) initWithImageScanner: (ZBarImageScanner*) imageScanner;
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// this must be called before the session is started
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- (void) willStartRunning;
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// this must be called *before* the session is stopped
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- (void) willStopRunning;
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// clear the internal result cache
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- (void) flushCache;
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// capture the next frame after processing. the captured image will
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// follow the same delegate path as an image with decoded symbols.
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- (void) captureFrame;
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// the capture output. add this to an instance of AVCaptureSession
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@property (nonatomic, readonly) AVCaptureOutput *captureOutput;
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// delegate is notified of decode results and symbol tracking.
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@property (nonatomic, assign) id<ZBarCaptureDelegate> captureDelegate;
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// access to image scanner for configuration.
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@property (nonatomic, readonly) ZBarImageScanner *scanner;
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// region of image to scan in normalized coordinates.
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// NB horizontal crop currently ignored...
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@property (nonatomic, assign) CGRect scanCrop;
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// size of video frames.
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@property (nonatomic, readonly) CGSize size;
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// (quickly) gate the reader function without interrupting the video
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// stream. also flushes the cache when enabled. defaults to *NO*
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@property (nonatomic) BOOL enableReader;
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// current frame rate (for debug/optimization).
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// only valid when running
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@property (nonatomic, readonly) CGFloat framesPerSecond;
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@property (nonatomic) BOOL enableCache;
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@end
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