Example implementation of Flicks for macOS/iOS

flicks.swift

import Foundation
import CoreMedia

// CMTimeScale is a typealias for Int32
enum Flicks {
    static let timescale = CMTimeScale(integerLiteral: 705600000)
}

// CMTime is used throughout AVFoundation & other media APIs
extension CMTime {
    init(flicks: CMTimeValue) {
        self.init(value: flicks, timescale: Flicks.timescale)
    }

    var flicks: Int64 {
        return convertScale(Flicks.timescale, method: .default).value
    }
}

// TimeInterval is a typealias for Double and denotes seconds
// It's used throughout most system / animation code
extension TimeInterval {
    init(flicks: Int64) {
        self.init(CMTime(flicks: flicks).seconds)
    }

    var flicks: Int64 {
        return CMTime(seconds: self, preferredTimescale: Flicks.timescale).flicks
    }
}

// A few tests

CMTime(flicks: 705600000).seconds == 1
CMTime(flicks: 705600000 * 2).seconds == 2
CMTime(seconds: 10, preferredTimescale: 1000).flicks == Int64(705600000) * 10
CMTime(seconds: 20.5, preferredTimescale: 1000).flicks == TimeInterval(20.5).flicks

CMTime(flicks: 234092).seconds == TimeInterval(flicks: 234092)