83 lines
2.3 KiB
Objective-C
83 lines
2.3 KiB
Objective-C
//
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// SCBlackCameraSessionBlockDetector.m
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// Snapchat
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//
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// Created by Derek Wang on 25/01/2018.
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//
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#import "SCBlackCameraSessionBlockDetector.h"
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#import "SCBlackCameraReporter.h"
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#import <SCLogger/SCCameraMetrics.h>
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#import <SCLogger/SCLogger.h>
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@import CoreGraphics;
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// Longer than 5 seconds is considerred as black camera
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static CGFloat const kSCBlackCameraBlockingThreshold = 5;
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// Will report if session blocks longer than 1 second
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static CGFloat const kSCSessionBlockingLogThreshold = 1;
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@interface SCBlackCameraSessionBlockDetector () {
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NSTimeInterval _startTime;
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}
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@property (nonatomic) SCBlackCameraReporter *reporter;
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@end
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@implementation SCBlackCameraSessionBlockDetector
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- (instancetype)initWithReporter:(SCBlackCameraReporter *)reporter
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{
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if (self = [super init]) {
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_reporter = reporter;
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}
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return self;
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}
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- (void)sessionWillCallStartRunning
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{
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_startTime = [NSDate timeIntervalSinceReferenceDate];
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}
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- (void)sessionDidCallStartRunning
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{
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[self _reportBlackCameraIfNeededWithCause:SCBlackCameraSessionStartRunningBlocked];
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[self _reportBlockingIfNeededWithCause:SCBlackCameraSessionStartRunningBlocked];
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}
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- (void)sessionWillCommitConfiguration
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{
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_startTime = [NSDate timeIntervalSinceReferenceDate];
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}
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- (void)sessionDidCommitConfiguration
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{
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[self _reportBlackCameraIfNeededWithCause:SCBlackCameraSessionConfigurationBlocked];
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[self _reportBlockingIfNeededWithCause:SCBlackCameraSessionConfigurationBlocked];
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}
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- (void)_reportBlockingIfNeededWithCause:(SCBlackCameraCause)cause
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{
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NSTimeInterval duration = [NSDate timeIntervalSinceReferenceDate] - _startTime;
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if (duration >= kSCSessionBlockingLogThreshold) {
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NSString *causeStr = [_reporter causeNameFor:cause];
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[[SCLogger sharedInstance] logEvent:KSCCameraCaptureSessionBlocked
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parameters:@{
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@"cause" : causeStr,
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@"duration" : @(duration)
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}];
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}
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}
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- (void)_reportBlackCameraIfNeededWithCause:(SCBlackCameraCause)cause
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{
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NSTimeInterval endTime = [NSDate timeIntervalSinceReferenceDate];
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if (endTime - _startTime >= kSCBlackCameraBlockingThreshold) {
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[_reporter reportBlackCameraWithCause:cause];
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}
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}
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@end
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