feat(player): add native audio output controls

ios/Runner.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		A0D100000000000000000001 /* AudioOutputView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A0D100000000000000000002 /* AudioOutputView.swift */; };
 		F59500000000000000000011 /* PlayerWidgetState.swift in Sources */ = {isa = PBXBuildFile; fileRef = F59500000000000000000001 /* PlayerWidgetState.swift */; };
 		F59500000000000000000012 /* PlayerControlIntent.swift in Sources */ = {isa = PBXBuildFile; fileRef = F59500000000000000000002 /* PlayerControlIntent.swift */; };
 		F59500000000000000000013 /* PlayerWidgetBridge.swift in Sources */ = {isa = PBXBuildFile; fileRef = F59500000000000000000004 /* PlayerWidgetBridge.swift */; };
@@ -69,6 +70,7 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		A0D100000000000000000002 /* AudioOutputView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AudioOutputView.swift; sourceTree = "<group>"; };
 		F59500000000000000000009 /* PlayerWidget.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = PlayerWidget.xcconfig; sourceTree = "<group>"; };
 		F59500000000000000000001 /* PlayerWidgetState.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PlayerWidgetState.swift; sourceTree = "<group>"; };
 		F59500000000000000000002 /* PlayerControlIntent.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PlayerControlIntent.swift; sourceTree = "<group>"; };
@@ -210,6 +212,7 @@
 				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
 				74858FAE1ED2DC5600515810 /* AppDelegate.swift */,
 				F59500000000000000000004 /* PlayerWidgetBridge.swift */,
+				A0D100000000000000000002 /* AudioOutputView.swift */,
 				F59500000000000000000007 /* Runner.entitlements */,
 				C03400000000000000000002 /* CoreBackend.swift */,
 				D08A594730CF000100000002 /* DownloadProgressSubscription.swift */,
@@ -471,6 +474,7 @@
 				F59500000000000000000011 /* PlayerWidgetState.swift in Sources */,
 				F59500000000000000000012 /* PlayerControlIntent.swift in Sources */,
 				F59500000000000000000013 /* PlayerWidgetBridge.swift in Sources */,
+				A0D100000000000000000001 /* AudioOutputView.swift in Sources */,
 				C03400000000000000000001 /* CoreBackend.swift in Sources */,
 				D08A594730CF000100000001 /* DownloadProgressSubscription.swift in Sources */,
 				A11CE0012F00000000000001 /* ExtensionCallbackParser.swift in Sources */,

ios/Runner/AppDelegate.swift

@@ -106,6 +106,10 @@ import UniformTypeIdentifiers
         )
 
         GeneratedPluginRegistrant.register(with: registry)
+        registry.registrar(forPlugin: "AudioOutputView")?.register(
+            AudioOutputViewFactory(messenger: messenger),
+            withId: "com.zarz.spotiflac/audio_output"
+        )
     }
 
     /// The window of the foreground scene. Under the UIScene lifecycle the

ios/Runner/AudioOutputView.swift

@@ -0,0 +1,72 @@
+import AVKit
+import Flutter
+import UIKit
+
+final class AudioOutputViewFactory: NSObject, FlutterPlatformViewFactory {
+    private let messenger: FlutterBinaryMessenger
+
+    init(messenger: FlutterBinaryMessenger) {
+        self.messenger = messenger
+        super.init()
+    }
+
+    func createArgsCodec() -> FlutterMessageCodec & NSObjectProtocol {
+        FlutterStandardMessageCodec.sharedInstance()
+    }
+
+    func create(withFrame frame: CGRect, viewIdentifier viewId: Int64, arguments args: Any?) -> FlutterPlatformView {
+        AudioOutputView(frame: frame, id: viewId, messenger: messenger, arguments: args)
+    }
+}
+
+private final class AudioOutputView: NSObject, FlutterPlatformView, AVRoutePickerViewDelegate {
+    private let picker: AVRoutePickerView
+    private let channel: FlutterMethodChannel
+
+    init(frame: CGRect, id: Int64, messenger: FlutterBinaryMessenger, arguments: Any?) {
+        picker = AVRoutePickerView(frame: frame)
+        channel = FlutterMethodChannel(name: "com.zarz.spotiflac/audio_output/\(id)", binaryMessenger: messenger)
+        super.init()
+        picker.backgroundColor = .clear
+        picker.prioritizesVideoDevices = false
+        picker.delegate = self
+        update(arguments)
+        channel.setMethodCallHandler { [weak self] call, result in
+            if call.method == "update" {
+                self?.update(call.arguments)
+                result(nil)
+            } else {
+                result(FlutterMethodNotImplemented)
+            }
+        }
+    }
+
+    private func update(_ arguments: Any?) {
+        guard let values = arguments as? [String: Any] else { return }
+        if let value = values["color"] as? NSNumber {
+            let argb = value.uint32Value
+            picker.tintColor = UIColor(
+                red: CGFloat((argb >> 16) & 0xff) / 255,
+                green: CGFloat((argb >> 8) & 0xff) / 255,
+                blue: CGFloat(argb & 0xff) / 255,
+                alpha: CGFloat((argb >> 24) & 0xff) / 255
+            )
+            picker.activeTintColor = picker.tintColor
+        }
+        picker.accessibilityLabel = values["label"] as? String
+    }
+
+    func view() -> UIView { picker }
+
+    func routePickerViewWillBeginPresentingRoutes(_ routePickerView: AVRoutePickerView) {
+        channel.invokeMethod("pickerChanged", arguments: true)
+    }
+
+    func routePickerViewDidEndPresentingRoutes(_ routePickerView: AVRoutePickerView) {
+        channel.invokeMethod("pickerChanged", arguments: false)
+    }
+
+    deinit {
+        channel.setMethodCallHandler(nil)
+    }
+}