ios – AudioQueueRef intercept audio information to construct a music visualiser (or AVAudioEngine or AudioEngine from AudioKit)

I need to combine the FFTView from AudioKit into my app to indicate this cool visualiser.

The issue I’m dealing with is that the audio that I’m enjoying comes from a 2014 library (TritonSDK) which streams the audio from someplace to supply you a radio station to hearken to. So I’ve no management over the audio in any way, the whole lot is dealt with by the SDK.

The SDK nevertheless, is exposing a AudioQueueRef property, however from what I see in Apple’s docs, there is no such thing as a solution to subscribe to audio information to it, in the event you’re not controlling the creation of the queue.

So I assumed, plan B: use AVAudioEngine to choose up the sound that’s already enjoying, however sadly I do not get any information for the visualiser (I get again 0 worth array of Floats)

Any thought what I is perhaps doing mistaken, or is that this even attainable what I am making an attempt? Thanks upfront!

My setup:

import AudioKit
import AVFAudio

closing class AudioCapture: ObservableObject {
    @Printed non-public(set) var node: Node

    non-public let engine = AVAudioEngine()

    init() {
        self.node = NodeWrapper(avAudioNode: engine.mainMixerNode)
    }

    func begin() {
        do {
            strive engine.begin()
        } catch {
            print("Error beginning AVAudioEngine: (error.localizedDescription)")
        }
        if node.avAudioNode != engine.mainMixerNode {
            node = NodeWrapper(avAudioNode: engine.mainMixerNode)
        }
    }

    func cease() {
        engine.cease()
    }
}

// MARK: - Utility

non-public closing class NodeWrapper: Node {
    var connections: [Node] = []
    let avAudioNode: AVAudioNode

    init(avAudioNode: AVAudioNode) {
        self.avAudioNode = avAudioNode
    }
}

import SwiftUI
import AudioKitUI

struct RadioView: View {
    @ObservedObject var viewModel: RadioViewModel
    @Setting(.safeAreaInsets) non-public var safeAreaInsets: EdgeInsets

    var physique: some View {
        FFTView(viewModel.audioCapture.node)
    }
}