Created
December 21, 2020 19:17
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set MIDIPacket data from an array
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| // | |
| // packet.swift | |
| // | |
| // As CoreMIDI/MIDIPacket exposes the 'data' member as a Tuple in Swift, this | |
| // solution accepts a varying size [UInt8] and returns the corresponding tuple. | |
| // Usage is as follows: | |
| // | |
| // packet.data = packetDataFromBytes(data: myArray) | |
| // | |
| // Created by James Ranson on 12/19/20. | |
| // | |
| import Foundation | |
| let packetDataSize: Int = 256 | |
| // Swift exposes MIDIPacket.data as a 256-byte tuple. This accepts a command of any size, | |
| // up to 256 bytes, and returns the corresponding tuple for constructing a packet | |
| func packetDataFromBytes(data: [UInt8]) -> PacketData { | |
| var padded: [UInt8] | |
| if data.count == packetDataSize { | |
| padded = data | |
| } else { | |
| padded = Array(repeating: UInt8(0), count: packetDataSize) | |
| // take the provided data and put it into a fixed 256-byte 0-padded version | |
| for i in 0..<data.count { | |
| if i >= packetDataSize { | |
| break | |
| } | |
| padded[i] = data[i] | |
| } | |
| } | |
| // make a tuple from the padded array and return it | |
| return padded.withUnsafeBytes {buf in | |
| return buf.bindMemory(to: PacketData.self)[0] | |
| } | |
| } | |
| typealias PacketData = (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, | |
| UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8) |
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