//
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// SGScanCode.m
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// SGQRCodeExample
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//
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// Created by kingsic on 2016/8/16.
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// Copyright © 2016年 kingsic. All rights reserved.
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//
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#import "SGScanCode.h"
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#import <AVFoundation/AVFoundation.h>
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#import "SGSoundEffect.h"
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#import "SGQRCodeLog.h"
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@interface SGScanCode () <AVCaptureMetadataOutputObjectsDelegate, AVCaptureVideoDataOutputSampleBufferDelegate>
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{
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SGSoundEffect *soundEffect;
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}
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@property (nonatomic, strong) AVCaptureDevice *device;
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@property (nonatomic, strong) AVCaptureDeviceInput *deviceInput;
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@property (nonatomic, strong) AVCaptureMetadataOutput *metadataOutput;
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@property (nonatomic, strong) AVCaptureVideoDataOutput *videoDataOutput;
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@property (nonatomic, strong) AVCaptureSession *session;
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@property (nonatomic, strong) NSArray *metadataObjectTypes;
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@property (nonatomic, strong) AVCaptureVideoPreviewLayer *videoPreviewLayer;
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@property (nonatomic, strong) dispatch_queue_t captureQueue;
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@end
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@implementation SGScanCode
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- (void)dealloc {
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if ([SGQRCodeLog sharedQRCodeLog].log) {
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NSLog(@"SGScanCode - - dealloc");
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}
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}
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+ (instancetype)scanCode {
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return [[self alloc] init];
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}
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- (instancetype)init {
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if ([super init]) {
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self.captureQueue = dispatch_queue_create("com.SGQRCode.captureQueue", DISPATCH_QUEUE_CONCURRENT);
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/// 将设备输入对象添加到会话对象中
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if ([self.session canAddInput:self.deviceInput]) {
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[self.session addInput:self.deviceInput];
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}
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}
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return self;
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}
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#pragma mark - - .h公开的属性
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- (void)setPreview:(UIView *)preview {
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_preview = preview;
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[preview.layer insertSublayer:self.videoPreviewLayer atIndex:0];
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}
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- (void)setDelegate:(id<SGScanCodeDelegate>)delegate {
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_delegate = delegate;
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/// 将元数据输出对象添加到会话对象中
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if ([_session canAddOutput:self.metadataOutput]) {
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[_session addOutput:self.metadataOutput];
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}
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/// 元数据输出对象的二维码识数据别类型
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_metadataOutput.metadataObjectTypes = self.metadataObjectTypes;
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}
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- (void)setSampleBufferDelegate:(id<SGScanCodeSampleBufferDelegate>)sampleBufferDelegate {
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_sampleBufferDelegate = sampleBufferDelegate;
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/// 添加捕获输出流到会话对象；构成识了别光线强弱
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if ([_session canAddOutput:self.videoDataOutput]) {
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[_session addOutput:self.videoDataOutput];
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}
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}
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- (void)setRectOfInterest:(CGRect)rectOfInterest {
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_rectOfInterest = rectOfInterest;
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_metadataOutput.rectOfInterest = rectOfInterest;
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}
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#pragma mark - - .h公开的方法
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- (void)readQRCode:(UIImage *)image completion:(void (^)(NSString *result))completion {
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CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{CIDetectorAccuracy: CIDetectorAccuracyHigh}];
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// 获取识别结果
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NSArray *features = [detector featuresInImage:[CIImage imageWithCGImage:image.CGImage]];
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NSString *tempMessageString = nil;
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if (features.count > 0) {
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CIQRCodeFeature *feature = features[0];
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tempMessageString = feature.messageString;
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}
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if (completion) {
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completion(tempMessageString);
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}
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if ([SGQRCodeLog sharedQRCodeLog].log) {
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NSLog(@"图片中的二维码数据：%@", tempMessageString);
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}
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}
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- (void)setVideoZoomFactor:(CGFloat)factor {
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if (factor > self.device.maxAvailableVideoZoomFactor) {
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factor = self.device.maxAvailableVideoZoomFactor;
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} else if (factor < 1) {
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factor = 1;
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}
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// 设置焦距大小
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if ([self.device lockForConfiguration:nil]) {
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[self.device rampToVideoZoomFactor:factor withRate:10];
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[self.device unlockForConfiguration];
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}
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}
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- (BOOL)checkCameraDeviceRearAvailable {
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BOOL isRearCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];
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return isRearCamera;
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}
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- (void)startRunning {
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if (![self.session isRunning]) {
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[self.session startRunning];
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}
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}
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- (void)stopRunning {
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if ([self.session isRunning]) {
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[self.session stopRunning];
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}
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}
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- (void)playSoundEffect:(NSString *)name {
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/// 静态库 path 的获取
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NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:nil];
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if (!path) {
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/// 动态库 path 的获取
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path = [[NSBundle bundleForClass:[self class]] pathForResource:name ofType:nil];
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}
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soundEffect = [SGSoundEffect soundEffectWithFilepath:path];
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[soundEffect play];
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}
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#pragma mark - - 内部属性
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- (AVCaptureSession *)session {
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if (!_session) {
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_session = [[AVCaptureSession alloc] init];
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_session.sessionPreset = [self sessionPreset];
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}
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return _session;
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}
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- (AVCaptureDevice *)device {
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if (!_device) {
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_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
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}
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return _device;
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}
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- (AVCaptureDeviceInput *)deviceInput {
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if (!_deviceInput) {
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_deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:self.device error:nil];
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}
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return _deviceInput;
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}
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- (AVCaptureMetadataOutput *)metadataOutput {
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if (!_metadataOutput) {
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_metadataOutput = [[AVCaptureMetadataOutput alloc] init];
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[_metadataOutput setMetadataObjectsDelegate:self queue:self.captureQueue];
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}
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return _metadataOutput;
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}
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- (AVCaptureVideoDataOutput *)videoDataOutput {
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if (!_videoDataOutput) {
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_videoDataOutput = [[AVCaptureVideoDataOutput alloc] init];
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[_videoDataOutput setSampleBufferDelegate:self queue:self.captureQueue];
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}
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return _videoDataOutput;
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}
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- (AVCaptureVideoPreviewLayer *)videoPreviewLayer {
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if (!_videoPreviewLayer) {
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_videoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:_session];
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_videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
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_videoPreviewLayer.frame = self.preview.frame;
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}
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return _videoPreviewLayer;
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}
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- (NSArray *)metadataObjectTypes {
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if (!_metadataObjectTypes) {
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_metadataObjectTypes = @[
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AVMetadataObjectTypeUPCECode,
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AVMetadataObjectTypeCode39Code,
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AVMetadataObjectTypeCode39Mod43Code,
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AVMetadataObjectTypeEAN13Code,
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AVMetadataObjectTypeEAN8Code,
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AVMetadataObjectTypeCode93Code,
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AVMetadataObjectTypeCode128Code,
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AVMetadataObjectTypePDF417Code,
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AVMetadataObjectTypeQRCode,
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AVMetadataObjectTypeAztecCode,
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AVMetadataObjectTypeInterleaved2of5Code,
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AVMetadataObjectTypeITF14Code,
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AVMetadataObjectTypeDataMatrixCode,
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];
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}
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return _metadataObjectTypes;
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}
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- (NSString *)sessionPreset {
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if ([self.device supportsAVCaptureSessionPreset:AVCaptureSessionPreset3840x2160]) {
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return AVCaptureSessionPreset3840x2160;
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}
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if ([self.device supportsAVCaptureSessionPreset:AVCaptureSessionPreset1920x1080]) {
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return AVCaptureSessionPreset1920x1080;
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}
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if ([self.device supportsAVCaptureSessionPreset:AVCaptureSessionPreset1280x720]) {
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return AVCaptureSessionPreset1280x720;
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}
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if ([self.device supportsAVCaptureSessionPreset:AVCaptureSessionPreset640x480]) {
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return AVCaptureSessionPreset640x480;
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}
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if ([self.device supportsAVCaptureSessionPreset:AVCaptureSessionPreset352x288]) {
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return AVCaptureSessionPreset352x288;
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}
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if ([self.device supportsAVCaptureSessionPreset:AVCaptureSessionPresetHigh]) {
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return AVCaptureSessionPresetHigh;
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}
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if ([self.device supportsAVCaptureSessionPreset:AVCaptureSessionPresetMedium]) {
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return AVCaptureSessionPresetMedium;
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}
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return AVCaptureSessionPresetLow;
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}
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#pragma mark - - AVCaptureMetadataOutputObjectsDelegate 的方法
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- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection {
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if (metadataObjects != nil && metadataObjects.count > 0) {
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AVMetadataMachineReadableCodeObject *obj = metadataObjects[0];
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NSString *resultString = obj.stringValue;
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dispatch_async(dispatch_get_main_queue(), ^{
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if (self.delegate && [self.delegate respondsToSelector:@selector(scanCode:result:)]) {
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[self.delegate scanCode:self result:resultString];
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}
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});
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if ([SGQRCodeLog sharedQRCodeLog].log) {
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NSLog(@"扫描的二维码数据：%@", obj);
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}
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}
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}
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#pragma mark - - AVCaptureVideoDataOutputSampleBufferDelegate 的方法
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- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
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CFDictionaryRef metadataDict = CMCopyDictionaryOfAttachments(NULL, sampleBuffer, kCMAttachmentMode_ShouldPropagate);
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NSDictionary *metadata = [[NSMutableDictionary alloc] initWithDictionary:(__bridge NSDictionary*)metadataDict];
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CFRelease(metadataDict);
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NSDictionary *exifMetadata = [[metadata objectForKey:(NSString *)kCGImagePropertyExifDictionary] mutableCopy];
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CGFloat brightnessValue = [[exifMetadata objectForKey:(NSString *)kCGImagePropertyExifBrightnessValue] floatValue];
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dispatch_async(dispatch_get_main_queue(), ^{
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if (self.sampleBufferDelegate && [self.sampleBufferDelegate respondsToSelector:@selector(scanCode:brightness:)]) {
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[self.sampleBufferDelegate scanCode:self brightness:brightnessValue];
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}
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});
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}
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@end
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