63 lines
2.0 KiB
Swift
63 lines
2.0 KiB
Swift
import Foundation
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/// ISO/IEC 14496-12 5th 8.4.3.2
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struct MP4HandlerBox: MP4FullBox {
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static let version: UInt8 = 0
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static let flags: UInt32 = 0
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// MARK: MP4FullBox
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var size: UInt32 = 0
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let type: String = "hdlr"
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var offset: UInt64 = 0
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var version: UInt8 = Self.version
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var flags: UInt32 = Self.flags
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var children: [MP4BoxConvertible] = []
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// MARK: MP4HandlerBox
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var handlerType: UInt32 = 0
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var name: String = ""
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}
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extension MP4HandlerBox: DataConvertible {
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// MARK: 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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.writeUInt32(0) // pre_defined
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.writeUInt32(handlerType)
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.writeUInt32(0) // reserved
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.writeUInt32(0) // reserved
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.writeUInt32(0) // reserved
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.writeUTF8Bytes(name)
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.writeUTF8Bytes("\0")
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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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buffer.position += 4 // pre_defined
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handlerType = try buffer.readUInt32()
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buffer.position += 4 // reserved
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buffer.position += 4 // reserved
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buffer.position += 4 // reserved
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name = try buffer.readUTF8Bytes(buffer.bytesAvailable - 1)
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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 hdlr = MP4Box.Name<MP4HandlerBox>(rawValue: "hdlr")
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}
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