67 lines
1.9 KiB
Objective-C
67 lines
1.9 KiB
Objective-C
//
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// SCCaptureResource.m
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// Snapchat
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//
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// Created by Lin Jia on 10/19/17.
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//
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//
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#import "SCCaptureResource.h"
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#import "SCBlackCameraDetector.h"
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#import "SCManagedCapturerState.h"
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#import "SCManagedFrontFlashController.h"
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#import "SCManagedVideoCapturer.h"
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#import <SCFoundation/SCAssertWrapper.h>
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#import <SCFoundation/SCQueuePerformer.h>
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#import <SCFoundation/SCTraceODPCompatible.h>
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#import <FBKVOController/FBKVOController.h>
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@interface SCCaptureResource () {
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FBKVOController *_previewHiddenKVO;
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}
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@end
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@implementation SCCaptureResource
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- (SCManagedFrontFlashController *)frontFlashController
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{
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SCTraceODPCompatibleStart(2);
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SCAssert([self.queuePerformer isCurrentPerformer], @"");
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if (!_frontFlashController) {
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_frontFlashController = [[SCManagedFrontFlashController alloc] init];
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}
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return _frontFlashController;
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}
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- (void)setVideoPreviewLayer:(AVCaptureVideoPreviewLayer *)layer
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{
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SC_GUARD_ELSE_RETURN(layer != _videoPreviewLayer);
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if (_videoPreviewLayer) {
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[_previewHiddenKVO unobserve:_videoPreviewLayer];
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}
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_videoPreviewLayer = layer;
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SC_GUARD_ELSE_RETURN(_videoPreviewLayer);
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if (!_previewHiddenKVO) {
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_previewHiddenKVO = [[FBKVOController alloc] initWithObserver:self];
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}
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[_previewHiddenKVO observe:_videoPreviewLayer
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keyPath:@keypath(_videoPreviewLayer.hidden)
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options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld
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block:^(id observer, id object, NSDictionary *change) {
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BOOL oldValue = [change[NSKeyValueChangeOldKey] boolValue];
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BOOL newValue = [change[NSKeyValueChangeNewKey] boolValue];
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if (oldValue != newValue) {
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[_blackCameraDetector capturePreviewDidBecomeVisible:!newValue];
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}
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}];
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}
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@end
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