Tune up your AirPlay audio experience

4:00 - Set the audio type

let audioSession = AVAudioSession.sharedInstance()
try audioSession.setCategory(. playback ,xmode: . default , policy:.longFormAudio )

7:23 - AVQueuePlayer

let player = AVQueuePlayer()

let url = URL(string: "http://www.examplecontenturl.com")
let asset = AVAsset(url: url)
let item = AVPlayItem(asset: asset)

player.insert(item, after: nil)
player.play()

8:28 - Add the audio renderer to the render synchronizer

let serializationQueue = DispatchQueue(label: "sample.buffer.player.serialization.queue")
let audioRenderer = AVSampleBufferAudioRenderer()
let renderSynchronizer = AVSampleBufferRenderSynchronizer()

renderSynchronizer.addRenderer(audioRenderer)

8:50 - Enqueue audio data

serializationQueue.async { [weak self] in
    guard let self = self else { return }
    // Start processing audio data and stop when there's no more data.
    self.audioRenderer.requestMediaDataWhenReady(on: serializationQueue) { [weak self] in
        guard let self = self else { return }
        while self.audioRenderer.isReadyForMoreMediaData {
            let sampleBuffer = self.nextSampleBuffer() // Returns nil at end of data.
            if let sampleBuffer = sampleBuffer {
                self.audioRenderer.enqueue(sampleBuffer)
            } else {
                // Tell the renderer to stop requesting audio data.
                audioRenderer.stopRequestingMediaData()
            }
        }
    }

    // Start playback at the natural rate of the media.
    self.renderSynchronizer.rate = 1.0
}