40 lines
1.3 KiB
Swift
40 lines
1.3 KiB
Swift
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import Foundation
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/// Non-drop-frame timecode. Frame count + fps.
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public struct Timecode: Sendable, Equatable, CustomStringConvertible {
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public var frames: Int
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public var fps: Int
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public init(frames: Int, fps: Int) {
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self.frames = frames
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self.fps = fps
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}
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/// Parse HH:MM:SS:FF.
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public static func parse(_ s: String, fps: Int) -> Timecode? {
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let parts = s.split(separator: ":")
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guard parts.count == 4,
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let h = Int(parts[0]), let m = Int(parts[1]),
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let sec = Int(parts[2]), let f = Int(parts[3]),
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m < 60, sec < 60, f < fps else { return nil }
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return Timecode(frames: ((h * 3600 + m * 60 + sec) * fps) + f, fps: fps)
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}
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public var description: String {
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let totalSeconds = frames / fps
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let f = frames % fps
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let h = totalSeconds / 3600
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let m = (totalSeconds % 3600) / 60
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let s = totalSeconds % 60
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return String(format: "%02d:%02d:%02d:%02d", h, m, s, f)
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}
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public static func + (l: Timecode, r: Timecode) -> Timecode {
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Timecode(frames: l.frames + r.frames, fps: l.fps)
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}
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public static func - (l: Timecode, r: Timecode) -> Timecode {
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Timecode(frames: max(0, l.frames - r.frames), fps: l.fps)
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}
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}
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