50 lines
1.5 KiB
Swift
50 lines
1.5 KiB
Swift
import Foundation
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/**
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- seealso: https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html#//apple_ref/doc/uid/TP40000939-CH205-124774
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*/
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struct MP4ElementaryStreamDescriptorBox: MP4FullBox {
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// MARK: MP4FullBox
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var size: UInt32 = 0
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let type: String = "esds"
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var offset: UInt64 = 0
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var children: [MP4BoxConvertible] = []
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var version: UInt8 = 0
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var flags: UInt32 = 0
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// MARK: MP4FullBox
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var descriptor = ESDescriptor()
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}
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extension MP4ElementaryStreamDescriptorBox: DataConvertible {
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var data: Data {
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get {
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let buffer = ByteArray()
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.writeUInt32(size)
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.writeUTF8Bytes(type)
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.writeUInt8(version)
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.writeUInt24(flags)
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.writeBytes(descriptor.data)
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let size = buffer.position
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buffer.position = 0
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buffer.writeUInt32(UInt32(size))
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return buffer.data
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}
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set {
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do {
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let buffer = ByteArray(data: newValue)
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size = try buffer.readUInt32()
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_ = try buffer.readUTF8Bytes(4)
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version = try buffer.readUInt8()
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flags = try buffer.readUInt24()
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descriptor.data = try buffer.readBytes(buffer.bytesAvailable)
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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 esds = MP4Box.Name<MP4ElementaryStreamDescriptorBox>(rawValue: "esds")
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}
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