85 lines
2.0 KiB
Swift
85 lines
2.0 KiB
Swift
import Foundation
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struct MP4Box: MP4BoxConvertible {
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static let containers: Set<String> = [
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"cmov",
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"ctts",
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"edts",
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"iods",
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"junk",
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"mdia",
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"minf",
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"moov",
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"pict",
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"pnot",
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"rmda",
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"rmra",
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"skip",
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"stbl",
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"trak",
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"uuid",
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"wide",
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"moof",
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"traf"
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]
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class Names {
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}
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final class Name<T: MP4BoxConvertible>: Names, Hashable, RawRepresentable {
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let rawValue: String
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// swiftlint:disable nesting
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typealias RawValue = String
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init(rawValue: String) {
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self.rawValue = rawValue
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}
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}
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var size: UInt32 = 0
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var type: String = ""
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var offset: UInt64 = 0
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var children: [MP4BoxConvertible] = []
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private var _data = Data()
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}
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extension MP4Box: DataConvertible {
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var data: Data {
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get {
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_data
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}
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set {
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do {
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_data = newValue
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let buffer = ByteArray(data: newValue)
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size = try buffer.readUInt32()
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type = try buffer.readUTF8Bytes(4)
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if Self.containers.contains(type) {
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children.removeAll()
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while 0 < buffer.bytesAvailable {
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let size = try buffer.readInt32()
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_ = try buffer.readBytes(4)
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buffer.position -= 8
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var child = MP4Box()
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child.data = try buffer.readBytes(Int(size))
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children.append(child)
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}
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}
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} catch {
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logger.error(error)
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}
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}
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}
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}
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extension MP4Box.Names {
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static let trak = MP4Box.Name<MP4Box>(rawValue: "trak")
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}
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extension MP4Box: CustomDebugStringConvertible {
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// MARK: CustomDebugStringConvertible
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var debugDescription: String {
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Mirror(reflecting: self).debugDescription
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}
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}
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