AudioBuffer (or AVAudioPCMBuffer) to array of float / Float array to AudioBuffer (or AVAudioPCMBuffer)

AudioBufferConversion.swift

import AVFoundation

extension AudioBuffer {
    func array() -> [Float] {
        return Array(UnsafeBufferPointer(self))
    }
}

extension AVAudioPCMBuffer {
    func array() -> [Float] {
        return self.audioBufferList.pointee.mBuffers.array()
    }
}

extension Array where Element: FloatingPoint {
    mutating func buffer() -> AudioBuffer {
        return AudioBuffer(mNumberChannels: 1, mDataByteSize: UInt32(self.count * MemoryLayout<Element>.size), mData: &self)
    }
}

awesome! 👍

Thanks! 😊

I'm getting Cannot use inout expression here; argument 'mData' must be a pointer that outlives the call to 'init(mNumberChannels:mDataByteSize:mData:)' on the &self in Xcode 13.4.1. I thought I'd be able to avoid this using withUnsafeMutablePointer(...) but I can't work out how.

(Edit: for future thread spelunkers, I've asked this question on SO and the Apple Dev Forums.)