Release 0.13.2

.github/workflows/validate.yml

@@ -2,10 +2,7 @@ name: validate
 on: [push]
 jobs:
   unit-tests:
-    runs-on: [self-hosted, macOS, arm64e]
-    defaults:
-      run:
-        shell: "/usr/bin/arch -arch arm64e /bin/bash {0}"
+    runs-on: macos-latest
     strategy:
       matrix:
         destination:
@@ -20,6 +17,4 @@ jobs:
           cd Example
           xcodebuild test -scheme SwiftAudio-Example -destination "${destination}" -enableCodeCoverage YES
         env:
-          destination: ${{ matrix.destination }}
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1.2.1
+          destination: ${{ matrix.destination }}

Example/SwiftAudio.xcodeproj/project.pbxproj

@@ -44,8 +44,9 @@
 		607FACEC1AFB9204008FA782 /* AVPlayerObserverTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 607FACEB1AFB9204008FA782 /* AVPlayerObserverTests.swift */; };
 		9B05AA312660276400C7A389 /* Quick in Frameworks */ = {isa = PBXBuildFile; productRef = 9B05AA302660276400C7A389 /* Quick */; };
 		9B05AA332660276400C7A389 /* Nimble in Frameworks */ = {isa = PBXBuildFile; productRef = 9B05AA322660276400C7A389 /* Nimble */; };
-		9B05AA3A266028E200C7A389 /* SwiftAudio in Frameworks */ = {isa = PBXBuildFile; productRef = 9B05AA39266028E200C7A389 /* SwiftAudio */; };
-		9B05AA3C26602C0E00C7A389 /* SwiftAudio in Frameworks */ = {isa = PBXBuildFile; productRef = 9B05AA3B26602C0E00C7A389 /* SwiftAudio */; };
+		9B521D0E2662937600EF0C3A /* MockDispatchQueue.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9B521D0D2662937600EF0C3A /* MockDispatchQueue.swift */; };
+		9B77D79426C522D0004BAF2F /* SwiftAudioEx in Frameworks */ = {isa = PBXBuildFile; productRef = 9B77D79326C522D0004BAF2F /* SwiftAudioEx */; };
+		9B77D79626C52382004BAF2F /* SwiftAudioEx in Frameworks */ = {isa = PBXBuildFile; productRef = 9B77D79526C52382004BAF2F /* SwiftAudioEx */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -94,6 +95,7 @@
 		607FACEA1AFB9204008FA782 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		607FACEB1AFB9204008FA782 /* AVPlayerObserverTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AVPlayerObserverTests.swift; sourceTree = "<group>"; };
 		9B05AA38266028D600C7A389 /* SwiftAudio */ = {isa = PBXFileReference; lastKnownFileType = folder; name = SwiftAudio; path = ..; sourceTree = "<group>"; };
+		9B521D0D2662937600EF0C3A /* MockDispatchQueue.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockDispatchQueue.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -101,7 +103,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				9B05AA3A266028E200C7A389 /* SwiftAudio in Frameworks */,
+				9B77D79426C522D0004BAF2F /* SwiftAudioEx in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -109,7 +111,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				9B05AA3C26602C0E00C7A389 /* SwiftAudio in Frameworks */,
+				9B77D79626C52382004BAF2F /* SwiftAudioEx in Frameworks */,
 				9B05AA312660276400C7A389 /* Quick in Frameworks */,
 				9B05AA332660276400C7A389 /* Nimble in Frameworks */,
 			);
@@ -136,6 +138,7 @@
 				07756B68218A4E870023935E /* AudioSession.swift */,
 				074B0D6A222C247B001A45A9 /* NowPlayingInfoCenter.swift */,
 				074B0D6C222C24DE001A45A9 /* NowPlayingInfoController.swift */,
+				9B521D0D2662937600EF0C3A /* MockDispatchQueue.swift */,
 			);
 			path = Mocks;
 			sourceTree = "<group>";
@@ -241,7 +244,7 @@
 			);
 			name = SwiftAudio_Example;
 			packageProductDependencies = (
-				9B05AA39266028E200C7A389 /* SwiftAudio */,
+				9B77D79326C522D0004BAF2F /* SwiftAudioEx */,
 			);
 			productName = SwiftAudio;
 			productReference = 607FACD01AFB9204008FA782 /* SwiftAudio_Example.app */;
@@ -264,7 +267,7 @@
 			packageProductDependencies = (
 				9B05AA302660276400C7A389 /* Quick */,
 				9B05AA322660276400C7A389 /* Nimble */,
-				9B05AA3B26602C0E00C7A389 /* SwiftAudio */,
+				9B77D79526C52382004BAF2F /* SwiftAudioEx */,
 			);
 			productName = Tests;
 			productReference = 607FACE51AFB9204008FA782 /* SwiftAudio_Tests.xctest */;
@@ -376,6 +379,7 @@
 				0775575920668B020002C6A1 /* QueueManagerTests.swift in Sources */,
 				074A6483205C155E0083D868 /* AVPlayerTimeObserverTests.swift in Sources */,
 				078C908F210D263200555E80 /* AVPlayerItemObserverTests.swift in Sources */,
+				9B521D0E2662937600EF0C3A /* MockDispatchQueue.swift in Sources */,
 				0708ED6C2116DA4C00EB29BD /* AudioSessionControllerTests.swift in Sources */,
 				074B0D6B222C247B001A45A9 /* NowPlayingInfoCenter.swift in Sources */,
 				07DBB1E1212C17E600BB4278 /* QueuedAudioPlayerTests.swift in Sources */,
@@ -668,13 +672,13 @@
 			package = 9B05AA2C2660274F00C7A389 /* XCRemoteSwiftPackageReference "Nimble" */;
 			productName = Nimble;
 		};
-		9B05AA39266028E200C7A389 /* SwiftAudio */ = {
+		9B77D79326C522D0004BAF2F /* SwiftAudioEx */ = {
 			isa = XCSwiftPackageProductDependency;
-			productName = SwiftAudio;
+			productName = SwiftAudioEx;
 		};
-		9B05AA3B26602C0E00C7A389 /* SwiftAudio */ = {
+		9B77D79526C52382004BAF2F /* SwiftAudioEx */ = {
 			isa = XCSwiftPackageProductDependency;
-			productName = SwiftAudio;
+			productName = SwiftAudioEx;
 		};
 /* End XCSwiftPackageProductDependency section */
 	};

Example/SwiftAudio/AudioController.swift

@@ -7,7 +7,7 @@
 //
 
 import Foundation
-import SwiftAudio
+import SwiftAudioEx
 
 
 class AudioController {

Example/SwiftAudio/QueueViewController.swift

@@ -7,7 +7,7 @@
 //
 
 import UIKit
-import SwiftAudio
+import SwiftAudioEx
 
 
 class QueueViewController: UIViewController {

Example/SwiftAudio/ViewController.swift

@@ -7,7 +7,7 @@
 //
 
 import UIKit
-import SwiftAudio
+import SwiftAudioEx
 import AVFoundation
 import MediaPlayer
 

Example/Tests/AVPlayerItemNotificationObserverTests.swift

@@ -2,7 +2,7 @@ import Quick
 import Nimble
 import AVFoundation
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 
 class AVPlayerItemNotificationObserverTests: QuickSpec {

Example/Tests/AVPlayerItemObserverTests.swift

@@ -2,7 +2,7 @@ import Quick
 import Nimble
 import AVFoundation
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class AVPlayerItemObserverTests: QuickSpec {
     
@@ -47,6 +47,12 @@ class AVPlayerItemObserverTests: QuickSpec {
 }
 
 class AVPlayerItemObserverDelegateHolder: AVPlayerItemObserverDelegate {
+    var receivedMetadata: ((_ metadata: [AVMetadataItem]) -> Void)?
+
+    func item(didReceiveMetadata metadata: [AVMetadataItem]) {
+        receivedMetadata?(metadata)
+    }
+
     
     var updateDuration: ((_ duration: Double) -> Void)?
     

Example/Tests/AVPlayerObserverTests.swift

@@ -2,7 +2,7 @@ import Quick
 import Nimble
 import AVFoundation
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 
 class AVPlayerObserverTests: QuickSpec, AVPlayerObserverDelegate {

Example/Tests/AVPlayerTimeObserverTests.swift

@@ -2,7 +2,7 @@ import Quick
 import Nimble
 import AVFoundation
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class AVPlayerTimeObserverTests: QuickSpec {
   

Example/Tests/AVPlayerWrapperTests.swift

@@ -1,7 +1,7 @@
 import AVFoundation
 import XCTest
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 
 class AVPlayerWrapperTests: XCTestCase {
@@ -182,6 +182,10 @@ class AVPlayerWrapperTests: XCTestCase {
 }
 
 class AVPlayerWrapperDelegateHolder: AVPlayerWrapperDelegate {
+    func AVWrapper(didReceiveMetadata metadata: [AVMetadataItem]) {
+        
+    }
+
     func AVWrapperDidRecreateAVPlayer() {
         
     }

Example/Tests/AudioPlayerEventTests.swift

@@ -2,7 +2,7 @@ import Quick
 import Nimble
 import MediaPlayer
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class AudioPlayerEventTests: QuickSpec {
     

Example/Tests/AudioPlayerTests.swift

@@ -3,7 +3,7 @@ import Nimble
 import AVFoundation
 import XCTest
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class AudioPlayerTests: XCTestCase {
     
@@ -124,8 +124,8 @@ class AudioPlayerTests: XCTestCase {
     
     // MARK: - Rate
     
-    func test_AudioPlayer__rate__should_be_0() {
-        XCTAssert(audioPlayer.rate == 0.0)
+    func test_AudioPlayer__rate__should_be_1() {
+        XCTAssert(audioPlayer.rate == 1.0)
     }
     
     func test_AudioPlayer__rate__playing_source__should_be_1() {

Example/Tests/AudioSessionControllerTests.swift

@@ -2,7 +2,7 @@ import Quick
 import Nimble
 import AVFoundation
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class AudioSessionControllerTests: QuickSpec {
     

Example/Tests/Mocks/AudioSession.swift

@@ -9,7 +9,7 @@
 import Foundation
 import AVFoundation
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 
 class NonFailingAudioSession: AudioSession {

Example/Tests/Mocks/MockDispatchQueue.swift

@@ -0,0 +1,17 @@
+//
+//  MockDispatchQueue.swift
+//  SwiftAudio_Tests
+//
+//  Created by David Chavez on 29.05.21.
+//  Copyright © 2021 Double Symmmery. All rights reserved.
+//
+
+import Foundation
+
+@testable import SwiftAudioEx
+
+final class MockDispatchQueue: DispatchQueueType {
+    func async(flags: DispatchWorkItemFlags, execute work: @escaping @convention(block) () -> Void) {
+        work()
+    }
+}

Example/Tests/Mocks/NowPlayingInfoCenter.swift

@@ -9,7 +9,7 @@
 import Foundation
 import AVFoundation
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class NowPlayingInfoCenter_Mock: NowPlayingInfoCenter {
     

Example/Tests/Mocks/NowPlayingInfoController.swift

@@ -9,7 +9,7 @@
 import Foundation
 import MediaPlayer
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class NowPlayingInfoController_Mock: NowPlayingInfoControllerProtocol {
     

Example/Tests/NowPlayingInfoControllerTests.swift

@@ -2,7 +2,7 @@ import Quick
 import Nimble
 import MediaPlayer
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class NowPlayingInfoControllerTests: QuickSpec {
     
@@ -12,7 +12,7 @@ class NowPlayingInfoControllerTests: QuickSpec {
             var nowPlayingController: NowPlayingInfoController!
             
             beforeEach {
-                nowPlayingController = NowPlayingInfoController(infoCenter: NowPlayingInfoCenter_Mock())
+                nowPlayingController = NowPlayingInfoController(dispatchQueue: MockDispatchQueue(), infoCenter: NowPlayingInfoCenter_Mock())
             }
             
             describe("its info dictionary") {

Example/Tests/NowPlayingInfoTests.swift

@@ -2,7 +2,7 @@ import Quick
 import Nimble
 import MediaPlayer
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 /// Tests that the AudioPlayer is automatically updating the values it should update in the NowPlayingInfoController.
 class NowPlayingInfoTests: QuickSpec {

Example/Tests/QueueManagerTests.swift

@@ -1,7 +1,7 @@
 import Quick
 import Nimble
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 
 class QueueManagerTests: QuickSpec {

Example/Tests/QueuedAudioPlayerTests.swift

@@ -1,7 +1,7 @@
 import Quick
 import Nimble
 
-@testable import SwiftAudio
+@testable import SwiftAudioEx
 
 class QueuedAudioPlayerTests: QuickSpec {
     override func spec() {

Example/Tests/Source/Source.swift

@@ -7,7 +7,7 @@
 //
 
 import Foundation
-import SwiftAudio
+import SwiftAudioEx
 import UIKit
 
 struct Source {

Package.swift

@@ -6,14 +6,14 @@ let package = Package(
     platforms: [.iOS(.v10)],
     products: [
         .library(
-            name: "SwiftAudio",
-            targets: ["SwiftAudio"]),
+            name: "SwiftAudioEx",
+            targets: ["SwiftAudioEx"]),
     ],
     dependencies: [],
     targets: [
         .target(
-            name: "SwiftAudio",
+            name: "SwiftAudioEx",
             dependencies: [],
-            path: "SwiftAudio/Classes")
+            path: "SwiftAudioEx/Classes")
     ]
-)
+)

README.md

@@ -88,7 +88,7 @@ let audioItem = DefaultAudioItem(audioUrl: "someUrl", sourceType: .stream)
 player.add(item: audioItem, playWhenReady: true) // Since this is the first item, we can supply playWhenReady: true to immedietaly start playing when the item is loaded.
 ```
 
-When a track is done playing, the player will load the next track and update the queue, as long as `automaticallyPlayNextSong` is `true` (default).
+When a track is done playing, the player will load the next track and update the queue.
 
 ##### Navigating the queue
 All `AudioItem`s are stored in either `previousItems` or `nextItems`, which refers to items that come prior to the `currentItem` and after, respectively. The queue is navigated with:
@@ -114,6 +114,9 @@ Current options for configuring the `AudioPlayer`:
 - `rate`
 - `audioTimePitchAlgorithm`: This value decides the `AVAudioTimePitchAlgorithm` used for each `AudioItem`. Implement `TimePitching` in your `AudioItem`-subclass to override individually for each `AudioItem`.
 
+Options particular to `QueuedAudioPlayer`:
+- `repeatMode`: The repeat mode: off, track, queue
+
 ### Audio Session
 Remember to activate an audio session with an appropriate category for your app. This can be done with `AudioSessionController`:
 ```swift
@@ -185,4 +188,4 @@ Jørgen Henrichsen
 
 ## License
 
-SwiftAudio is available under the MIT license. See the LICENSE file for more info.
+SwiftAudio is available under the MIT license. See the LICENSE file for more info.

SwiftAudio/Classes/NowPlayingInfoController/NowPlayingInfoController.swift

@@ -1,50 +0,0 @@
-//
-//  MediaInfoController.swift
-//  SwiftAudio
-//
-//  Created by Jørgen Henrichsen on 15/03/2018.
-//
-
-import Foundation
-import MediaPlayer
-
-
-public class NowPlayingInfoController: NowPlayingInfoControllerProtocol {
-    
-    private var _infoCenter: NowPlayingInfoCenter
-    private var _info: [String: Any] = [:]
-    
-    var infoCenter: NowPlayingInfoCenter {
-        return _infoCenter
-    }
-    
-    var info: [String: Any] {
-        return _info
-    }
-    
-    public required init() {
-        self._infoCenter = MPNowPlayingInfoCenter.default()
-    }
-    
-    public required init(infoCenter: NowPlayingInfoCenter) {
-        self._infoCenter = infoCenter
-    }
-    
-    public func set(keyValues: [NowPlayingInfoKeyValue]) {
-        keyValues.forEach { (keyValue) in
-            _info[keyValue.getKey()] = keyValue.getValue()
-        }
-        self._infoCenter.nowPlayingInfo = _info
-    }
-    
-    public func set(keyValue: NowPlayingInfoKeyValue) {
-        _info[keyValue.getKey()] = keyValue.getValue()
-        self._infoCenter.nowPlayingInfo = _info
-    }
-    
-    public func clear() {
-        self._info = [:]
-        self._infoCenter.nowPlayingInfo = _info
-    }
-    
-}

SwiftAudioEx.podspec

@@ -0,0 +1,26 @@
+#
+# Be sure to run `pod lib lint SwiftAudioEx.podspec' to ensure this is a
+# valid spec before submitting.
+#
+# Any lines starting with a # are optional, but their use is encouraged
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html
+#
+
+Pod::Spec.new do |s|
+  s.name             = 'SwiftAudioEx'
+  s.version          = '0.13.2'
+  s.summary          = 'Easy audio streaming for iOS'
+  s.description      = <<-DESC
+SwiftAudioEx is an audio player written in Swift, making it simpler to work with audio playback from streams and files.
+DESC
+
+  s.homepage         = 'https://github.com/DoubleSymmetry/SwiftAudioEx'
+  s.license          = { :type => 'MIT', :file => 'LICENSE' }
+  s.authors          = { 'David Chavez'     => 'david@dcvz.io',
+                        'Jørgen Henrichsen' => 'jh.henrichs@gmail.com', }
+  s.source           = { :git => 'https://github.com/DoubleSymmetry/SwiftAudioEx.git', :tag => s.version.to_s }
+
+  s.ios.deployment_target = '10.0'
+  s.swift_version = '5.0'
+  s.source_files = 'SwiftAudioEx/Classes/**/*'
+end

SwiftAudioEx/Classes/AVPlayerWrapper/AVPlayerWrapper.swift

@@ -59,6 +59,9 @@ class AVPlayerWrapper: AVPlayerWrapperProtocol {
         self.playerTimeObserver.delegate = self
         self.playerItemNotificationObserver.delegate = self
         self.playerItemObserver.delegate = self
+
+        // disabled since we're not making use of video playback
+        self.avPlayer.allowsExternalPlayback = false;
         
         playerTimeObserver.registerForPeriodicTimeEvents()
     }
@@ -133,10 +136,12 @@ class AVPlayerWrapper: AVPlayerWrapperProtocol {
     }
     
     func play() {
+        _playWhenReady = true
         avPlayer.play()
     }
     
     func pause() {
+        _playWhenReady = false
         avPlayer.pause()
     }
     
@@ -205,6 +210,9 @@ class AVPlayerWrapper: AVPlayerWrapperProtocol {
                             self.playerObserver.startObserving()
                             self.playerItemNotificationObserver.startObserving(item: currentItem)
                             self.playerItemObserver.startObserving(item: currentItem)
+                            for format in pendingAsset.availableMetadataFormats {
+                                self.delegate?.AVWrapper(didReceiveMetadata: pendingAsset.metadata(forFormat: format))
+                            }
                         }
                         break
                         
@@ -337,5 +345,9 @@ extension AVPlayerWrapper: AVPlayerItemObserverDelegate {
     func item(didUpdateDuration duration: Double) {
         self.delegate?.AVWrapper(didUpdateDuration: duration)
     }
+
+    func item(didReceiveMetadata metadata: [AVMetadataItem]) {
+        self.delegate?.AVWrapper(didReceiveMetadata: metadata)
+    }
     
 }

SwiftAudioEx/Classes/AVPlayerWrapper/AVPlayerWrapperDelegate.swift

@@ -6,6 +6,7 @@
 //
 
 import Foundation
+import MediaPlayer
 
 
 protocol AVPlayerWrapperDelegate: class {
@@ -15,6 +16,7 @@ protocol AVPlayerWrapperDelegate: class {
     func AVWrapper(failedWithError error: Error?)
     func AVWrapper(seekTo seconds: Int, didFinish: Bool)
     func AVWrapper(didUpdateDuration duration: Double)
+    func AVWrapper(didReceiveMetadata metadata: [AVMetadataItem])
     func AVWrapperItemDidPlayToEndTime()
     func AVWrapperDidRecreateAVPlayer()
     

SwiftAudioEx/Classes/AudioPlayer.swift

@@ -115,9 +115,17 @@ public class AudioPlayer: AVPlayerWrapperDelegate {
         set { _wrapper.isMuted = newValue }
     }
 
+    private var _rate: Float = 1.0
     public var rate: Float {
-        get { return wrapper.rate }
-        set { _wrapper.rate = newValue }
+        get { return _rate }
+        set {
+            _rate = newValue
+
+            // Only set the rate on the wrapper if it is already playing.
+            if _wrapper.rate > 0 {
+                _wrapper.rate = newValue
+            }
+        }
     }
     
     // MARK: - Init
@@ -311,7 +319,11 @@ public class AudioPlayer: AVPlayerWrapperDelegate {
                 updateNowPlayingPlaybackValues()
             }
             setTimePitchingAlgorithmForCurrentItem()
-        case .playing, .paused:
+        case .playing:
+            // When a track starts playing, reset the rate to the stored rate
+            self.rate = _rate;
+            fallthrough
+        case .paused:
             if (automaticallyUpdateNowPlayingInfo) {
                 updateNowPlayingPlaybackValues()
             }
@@ -338,6 +350,10 @@ public class AudioPlayer: AVPlayerWrapperDelegate {
     func AVWrapper(didUpdateDuration duration: Double) {
         self.event.updateDuration.emit(data: duration)
     }
+
+    func AVWrapper(didReceiveMetadata metadata: [AVMetadataItem]) {
+        self.event.receiveMetadata.emit(data: metadata)
+    }
     
     func AVWrapperItemDidPlayToEndTime() {
         self.event.playbackEnd.emit(data: .playedUntilEnd)

SwiftAudioEx/Classes/Event.swift

@@ -6,6 +6,7 @@
 //
 
 import Foundation
+import MediaPlayer
 
 extension AudioPlayer {
     
@@ -15,7 +16,9 @@ extension AudioPlayer {
     public typealias FailEventData = (Error?)
     public typealias SeekEventData = (seconds: Int, didFinish: Bool)
     public typealias UpdateDurationEventData = (Double)
+    public typealias MetadataEventData = ([AVMetadataItem])
     public typealias DidRecreateAVPlayerEventData = ()
+    public typealias QueueIndexEventData = (previousIndex: Int?, newIndex: Int?)
     
     public struct EventHolder {
         
@@ -55,6 +58,12 @@ extension AudioPlayer {
          - Important: Remember to dispatch to the main queue if any UI is updated in the event handler.
          */
         public let updateDuration: AudioPlayer.Event<UpdateDurationEventData> = AudioPlayer.Event()
+
+        /**
+         Emitted when the player receives metadata.
+         - Important: Remember to dispatch to the main queue if any UI is updated in the event handler.
+         */
+        public let receiveMetadata: AudioPlayer.Event<MetadataEventData> = AudioPlayer.Event()
         
         /**
          Emitted when the underlying AVPlayer instance is recreated. Recreation happens if the current player fails.
@@ -62,7 +71,13 @@ extension AudioPlayer {
          - Note: It can be necessary to set the AVAudioSession's category again when this event is emitted.
          */
         public let didRecreateAVPlayer: AudioPlayer.Event<()> = AudioPlayer.Event()
-        
+
+        /**
+         Emitted when a new track starts and the queue index changes.
+         - Important: Remember to dispatch to the main queue if any UI is updated in the event handler.
+         - Note: It is only fired for instances of a QueuedAudioPlayer.
+         */
+        public let queueIndex: AudioPlayer.Event<QueueIndexEventData> = AudioPlayer.Event()
     }
     
     public typealias EventClosure<EventData> = (EventData) -> Void

SwiftAudioEx/Classes/NowPlayingInfoController/NowPlayingInfoController.swift

@@ -0,0 +1,71 @@
+//
+//  MediaInfoController.swift
+//  SwiftAudio
+//
+//  Created by Jørgen Henrichsen on 15/03/2018.
+//
+
+import Foundation
+import MediaPlayer
+
+public class NowPlayingInfoController: NowPlayingInfoControllerProtocol {
+    private let concurrentInfoQueue: DispatchQueueType
+
+    private var _infoCenter: NowPlayingInfoCenter
+    private var _info: [String: Any] = [:]
+    
+    var infoCenter: NowPlayingInfoCenter {
+        return _infoCenter
+    }
+    
+    var info: [String: Any] {
+        return _info
+    }
+    
+    public required init() {
+        self.concurrentInfoQueue = DispatchQueue(label: "com.doublesymmetry.nowPlayingInfoQueue", attributes: .concurrent)
+        self._infoCenter = MPNowPlayingInfoCenter.default()
+    }
+
+    /// Used for testing purposes.
+    public required init(dispatchQueue: DispatchQueueType, infoCenter: NowPlayingInfoCenter) {
+        self.concurrentInfoQueue = dispatchQueue
+        self._infoCenter = infoCenter
+    }
+    
+    public required init(infoCenter: NowPlayingInfoCenter) {
+        self.concurrentInfoQueue = DispatchQueue(label: "com.doublesymmetry.nowPlayingInfoQueue", attributes: .concurrent)
+        self._infoCenter = infoCenter
+    }
+    
+    public func set(keyValues: [NowPlayingInfoKeyValue]) {
+        concurrentInfoQueue.async(flags: .barrier) { [weak self] in
+            guard let self = self else { return }
+
+            keyValues.forEach { (keyValue) in
+                self._info[keyValue.getKey()] = keyValue.getValue()
+            }
+
+            self._infoCenter.nowPlayingInfo = self._info
+        }
+    }
+    
+    public func set(keyValue: NowPlayingInfoKeyValue) {
+        concurrentInfoQueue.async(flags: .barrier) { [weak self] in
+            guard let self = self else { return }
+
+            self._info[keyValue.getKey()] = keyValue.getValue()
+            self._infoCenter.nowPlayingInfo = self._info
+        }
+    }
+    
+    public func clear() {
+        concurrentInfoQueue.async(flags: .barrier) { [weak self] in
+            guard let self = self else { return }
+
+            self._info = [:]
+            self._infoCenter.nowPlayingInfo = self._info
+        }
+    }
+    
+}

SwiftAudioEx/Classes/Observer/AVPlayerItemObserver.swift

@@ -14,6 +14,11 @@ protocol AVPlayerItemObserverDelegate: class {
      Called when the observed item updates the duration.
      */
     func item(didUpdateDuration duration: Double)
+
+    /**
+     Called when the observed item receives metadata
+     */
+    func item(didReceiveMetadata metadata: [AVMetadataItem])
     
 }
 
@@ -28,6 +33,7 @@ class AVPlayerItemObserver: NSObject {
     private struct AVPlayerItemKeyPath {
         static let duration = #keyPath(AVPlayerItem.duration)
         static let loadedTimeRanges = #keyPath(AVPlayerItem.loadedTimeRanges)
+        static let timedMetadata = #keyPath(AVPlayerItem.timedMetadata)
     }
     
     private(set) var isObserving: Bool = false
@@ -50,6 +56,7 @@ class AVPlayerItemObserver: NSObject {
         self.observingItem = item
         item.addObserver(self, forKeyPath: AVPlayerItemKeyPath.duration, options: [.new], context: &AVPlayerItemObserver.context)
         item.addObserver(self, forKeyPath: AVPlayerItemKeyPath.loadedTimeRanges, options: [.new], context: &AVPlayerItemObserver.context)
+        item.addObserver(self, forKeyPath: AVPlayerItemKeyPath.timedMetadata, options: [.new], context: &AVPlayerItemObserver.context)
     }
     
     func stopObservingCurrentItem() {
@@ -58,6 +65,7 @@ class AVPlayerItemObserver: NSObject {
         }
         observingItem.removeObserver(self, forKeyPath: AVPlayerItemKeyPath.duration, context: &AVPlayerItemObserver.context)
         observingItem.removeObserver(self, forKeyPath: AVPlayerItemKeyPath.loadedTimeRanges, context: &AVPlayerItemObserver.context)
+        observingItem.removeObserver(self, forKeyPath: AVPlayerItemKeyPath.timedMetadata, context: &AVPlayerItemObserver.context)
         self.isObserving = false
         self.observingItem = nil
     }
@@ -78,6 +86,11 @@ class AVPlayerItemObserver: NSObject {
             if let ranges = change?[.newKey] as? [NSValue], let duration = ranges.first?.timeRangeValue.duration {
                 self.delegate?.item(didUpdateDuration: duration.seconds)
             }
+
+        case AVPlayerItemKeyPath.timedMetadata:
+            if let metadata = change?[.newKey] as? [AVMetadataItem] {
+                self.delegate?.item(didReceiveMetadata: metadata)
+            }
         default: break
             
         }

SwiftAudioEx/Classes/QueueManager.swift

@@ -7,10 +7,22 @@
 
 import Foundation
 
+protocol QueueManagerDelegate: AnyObject {
+    func onReceivedFirstItem()
+    func onCurrentIndexChanged(oldIndex: Int, newIndex: Int)
+}
 
 class QueueManager<T> {
-    
-    private var _items: [T] = []
+
+    weak var delegate: QueueManagerDelegate? = nil
+
+    private var _items: [T] = [] {
+        didSet {
+            if oldValue.count == 0 && _items.count > 0 && _currentIndex == 0 {
+                delegate?.onReceivedFirstItem()
+            }
+        }
+    }
     
     /**
      All items held by the queue.
@@ -33,7 +45,11 @@ class QueueManager<T> {
         return Array(_items[0..<_currentIndex])
     }
     
-    private var _currentIndex: Int = 0
+    private var _currentIndex: Int = 0 {
+        didSet {
+            delegate?.onCurrentIndexChanged(oldIndex: oldValue, newIndex: _currentIndex)
+        }
+    }
     
     /**
      The index of the current item.

SwiftAudioEx/Classes/QueuedAudioPlayer.swift

@@ -11,15 +11,17 @@ import MediaPlayer
 /**
  An audio player that can keep track of a queue of AudioItems.
  */
-public class QueuedAudioPlayer: AudioPlayer {
+public class QueuedAudioPlayer: AudioPlayer, QueueManagerDelegate {
     
     let queueManager: QueueManager = QueueManager<AudioItem>()
-    
-    /**
-     Set wether the player should automatically play the next song when a song is finished.
-     Default is `true`.
-     */
-    public var automaticallyPlayNextSong: Bool = true
+
+    public override init(nowPlayingInfoController: NowPlayingInfoControllerProtocol = NowPlayingInfoController(), remoteCommandController: RemoteCommandController = RemoteCommandController()) {
+        super.init(nowPlayingInfoController: nowPlayingInfoController, remoteCommandController: remoteCommandController)
+        queueManager.delegate = self
+    }
+
+    /// The repeat mode for the queue player.
+    public var repeatMode: RepeatMode = .off
     
     public override var currentItem: AudioItem? {
         return queueManager.current
@@ -37,9 +39,11 @@ public class QueuedAudioPlayer: AudioPlayer {
      */
     public override func stop() {
         super.stop()
+        self.event.queueIndex.emit(data: (currentIndex, nil))
     }
     
     override func reset() {
+        super.reset()
         queueManager.clearQueue()
     }
     
@@ -185,9 +189,32 @@ public class QueuedAudioPlayer: AudioPlayer {
     
     override func AVWrapperItemDidPlayToEndTime() {
         super.AVWrapperItemDidPlayToEndTime()
-        if automaticallyPlayNextSong {
-            try? self.next()
+
+        switch repeatMode {
+        case .off: try? self.next()
+        case .track:
+            seek(to: 0)
+            play()
+        case .queue:
+            do {
+                try self.next()
+            } catch APError.QueueError.noNextItem {
+                do {
+                    try jumpToItem(atIndex: 0, playWhenReady: true)
+                } catch { /* TODO: handle possible errors from load */ }
+            } catch { /* TODO: handle possible errors from load */ }
         }
     }
-    
+
+    // MARK: - QueueManagerDelegate
+
+    func onCurrentIndexChanged(oldIndex: Int, newIndex: Int) {
+        // if _currentItem is nil, then this was triggered by a reset. ignore.
+        if _currentItem == nil { return }
+        self.event.queueIndex.emit(data: (oldIndex, newIndex))
+    }
+
+    func onReceivedFirstItem() {
+        self.event.queueIndex.emit(data: (nil, 0))
+    }
 }

SwiftAudioEx/Classes/RepeatMode.swift

@@ -0,0 +1,15 @@
+//
+//  RepeatMode.swift
+//  SwiftAudio
+//
+//  Created by David Chavez on 29.05.21.
+//  Copyright © 2021 Double Symmmery. All rights reserved.
+//
+
+import Foundation
+
+public enum RepeatMode: Int {
+    case off
+    case track
+    case queue
+}

SwiftAudioEx/Classes/Utils/DispatchQueueType.swift

@@ -0,0 +1,18 @@
+//
+//  DispatchQueueType.swift
+//  SwiftAudio
+//
+//  Created by David Chavez on 29.05.21.
+//
+
+import Foundation
+
+public protocol DispatchQueueType {
+    func async(flags: DispatchWorkItemFlags, execute work: @escaping @convention(block) () -> Void)
+}
+
+extension DispatchQueue: DispatchQueueType {
+    public func async(flags: DispatchWorkItemFlags, execute work: @escaping @convention(block) () -> Void) {
+        async(group: nil, qos: .unspecified, flags: flags, execute: work)
+    }
+}