AVPlayer audio buffering in swift 3 source disconnected observer

Question

I have app that plays AAC audio stream. Everything works fine, but when I disconnect stream and connect again after one second audio stop playing after half minute. When i don't reconnect i have error after one- two minutes. To reconnect i must stop AVPlayer and start again. I want to reconnect stream or show message immediately after player stops play music. How can I do that? Moreover i have another question: I convert my code to swift 3 and I have problem with one line:

fileprivate var playerItem = AVPlayerItem?()

error: cannot invoke initializer without argument How i can fix that? Maybe this is the problem?

My Radio Player class:

import Foundation
import AVFoundation
import UIKit

protocol errorMessageDelegate {
    func errorMessageChanged(_ newVal: String)
}

protocol sharedInstanceDelegate {
    func sharedInstanceChanged(_ newVal: Bool)
}

class RadioPlayer : NSObject {
    static let sharedInstance = RadioPlayer()
    var instanceDelegate:sharedInstanceDelegate? = nil
    var sharedInstanceBool = false {
        didSet {
            if let delegate = self.instanceDelegate {
                delegate.sharedInstanceChanged(self.sharedInstanceBool)
            }
        }
    }
    fileprivate var player = AVPlayer(url: URL(string: Globals.radioURL)!)
 //   fileprivate var playerItem = AVPlayerItem?()
    fileprivate var isPlaying = false

    var errorDelegate:errorMessageDelegate? = nil
    var errorMessage = "" {
        didSet {
            if let delegate = self.errorDelegate {
                delegate.errorMessageChanged(self.errorMessage)
            }
        }
    }

    override init() {
        super.init()

        errorMessage = ""

        let asset: AVURLAsset = AVURLAsset(url: URL(string: Globals.radioURL)!, options: nil)

        let statusKey = "tracks"

        asset.loadValuesAsynchronously(forKeys: [statusKey], completionHandler: {
            var error: NSError? = nil

            DispatchQueue.main.async(execute: {
                let status: AVKeyValueStatus = asset.statusOfValue(forKey: statusKey, error: &error)

                if status == AVKeyValueStatus.loaded{

                    let playerItem = AVPlayerItem(asset: asset)

                    self.player = AVPlayer(playerItem: playerItem)
                    self.sharedInstanceBool = true

                } else {
                    self.errorMessage = error!.localizedDescription
                    print(error!)
                }

            })


        })

        NotificationCenter.default.addObserver(
            forName: NSNotification.Name.AVPlayerItemFailedToPlayToEndTime,
            object: nil,
            queue: nil,
            using: { notification in
                print("Status: Failed to continue")
                self.errorMessage = NSLocalizedString("STREAM_INTERUPT", comment:"Stream was interrupted")
        })

        print("Initializing new player")

    }

    func resetPlayer() {
        errorMessage = ""

        let asset: AVURLAsset = AVURLAsset(url: URL(string: Globals.radioURL)!, options: nil)

        let statusKey = "tracks"

        asset.loadValuesAsynchronously(forKeys: [statusKey], completionHandler: {
            var error: NSError? = nil

            DispatchQueue.main.async(execute: {
                let status: AVKeyValueStatus = asset.statusOfValue(forKey: statusKey, error: &error)

                if status == AVKeyValueStatus.loaded{

                    let playerItem = AVPlayerItem(asset: asset)
          //          playerItem.addObserver(self, forKeyPath: "status", options: NSKeyValueObservingOptions.New, context: &ItemStatusContext)

                    self.player = AVPlayer(playerItem: playerItem)
                    self.sharedInstanceBool = true

                } else {
                    self.errorMessage = error!.localizedDescription
                    print(error!)
                }

            })
        })
    }

    func bufferFull() -> Bool {
        return bufferAvailableSeconds() > 45.0
    }

    func bufferAvailableSeconds() -> TimeInterval {
        // Check if there is a player instance
        if ((player.currentItem) != nil) {

            // Get current AVPlayerItem
            let item: AVPlayerItem = player.currentItem!
            if (item.status == AVPlayerItemStatus.readyToPlay) {

                let timeRangeArray: NSArray = item.loadedTimeRanges as NSArray
                if timeRangeArray.count < 1 { return(CMTimeGetSeconds(kCMTimeInvalid)) }
                let aTimeRange: CMTimeRange = (timeRangeArray.object(at: 0) as AnyObject).timeRangeValue
         //       let startTime = CMTimeGetSeconds(aTimeRange.end)
                let loadedDuration = CMTimeGetSeconds(aTimeRange.duration)

                return (TimeInterval)(loadedDuration);
            }
            else {
                return(CMTimeGetSeconds(kCMTimeInvalid))
            }
        } 
        else {
            return(CMTimeGetSeconds(kCMTimeInvalid))
        }
    }

    func play() {
        player.play()
        isPlaying = true
        print("Radio is \(isPlaying ? "" : "not ")playing")
    }

    func pause() {
        player.pause()
        isPlaying = false
        print("Radio is \(isPlaying ? "" : "not ")playing")
    }

    func currentlyPlaying() -> Bool {
        return isPlaying
    }
}

I will be grateful for help ;)

AVPlayer audio buffering in swift 3 source disconnected observer

Answers (1)

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