68 lines
2.2 KiB
Objective-C
68 lines
2.2 KiB
Objective-C
//
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// SCManagedCaptureDeviceSubjectAreaHandler.m
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// Snapchat
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//
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// Created by Xiaokang Liu on 19/03/2018.
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//
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#import "SCManagedCaptureDeviceSubjectAreaHandler.h"
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#import "SCCameraTweaks.h"
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#import "SCCaptureResource.h"
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#import "SCCaptureWorker.h"
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#import "SCManagedCaptureDevice+SCManagedCapturer.h"
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#import "SCManagedCapturer.h"
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#import "SCManagedCapturerState.h"
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#import <SCFoundation/SCAssertWrapper.h>
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#import <SCFoundation/SCQueuePerformer.h>
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@interface SCManagedCaptureDeviceSubjectAreaHandler () {
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__weak SCCaptureResource *_captureResource;
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}
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@end
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@implementation SCManagedCaptureDeviceSubjectAreaHandler
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- (instancetype)initWithCaptureResource:(SCCaptureResource *)captureResource
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{
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self = [super init];
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if (self) {
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SCAssert(captureResource, @"");
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_captureResource = captureResource;
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}
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return self;
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}
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- (void)stopObserving
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{
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[[NSNotificationCenter defaultCenter] removeObserver:self
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name:AVCaptureDeviceSubjectAreaDidChangeNotification
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object:nil];
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}
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- (void)startObserving
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{
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(_subjectAreaDidChange:)
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name:AVCaptureDeviceSubjectAreaDidChangeNotification
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object:nil];
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}
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#pragma mark - Private methods
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- (void)_subjectAreaDidChange:(NSDictionary *)notification
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{
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[_captureResource.queuePerformer perform:^{
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if (_captureResource.device.isConnected && !_captureResource.state.arSessionActive) {
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// Reset to continuous autofocus when the subject area changed
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[_captureResource.device continuousAutofocus];
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[_captureResource.device setExposurePointOfInterest:CGPointMake(0.5, 0.5) fromUser:NO];
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if (SCCameraTweaksEnablePortraitModeAutofocus()) {
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[SCCaptureWorker setPortraitModePointOfInterestAsynchronously:CGPointMake(0.5, 0.5)
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completionHandler:nil
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resource:_captureResource];
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}
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}
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}];
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}
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@end
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