use MediaTrackSettings instead of constraints

@@ -95,8 +95,8 @@ abstract class BarcodeReader {
     await completer.future;
   }
 
-  /// Set a listener for the media stream constraints.
-  void setMediaTrackConstraintsListener(void Function(MediaTrackConstraints) listener) {
+  /// Set a listener for the media stream settings.
+  void setMediaTrackSettingsListener(void Function(MediaTrackSettings) listener) {
     throw UnimplementedError(
       'setMediaTrackConstraintsListener() has not been implemented.',
     );

@@ -8,8 +8,8 @@ final class MediaTrackConstraintsDelegate {
   /// Constructs a [MediaTrackConstraintsDelegate] instance.
   const MediaTrackConstraintsDelegate();
 
-  /// Get the constraints for the given [mediaStream].
-  MediaTrackConstraints? getConstraints(MediaStream? mediaStream) {
+  /// Get the settings for the given [mediaStream].
+  MediaTrackSettings? getSettings(MediaStream? mediaStream) {
     final List<JSAny?> tracks = mediaStream?.getVideoTracks().toDart ?? const [];
 
     if (tracks.isEmpty) {
@@ -18,7 +18,7 @@ final class MediaTrackConstraintsDelegate {
 
     final MediaStreamTrack? track = tracks.first as MediaStreamTrack?;
 
-    return track?.getConstraints();
+    return track?.getSettings();
   }
 
   /// Returns a list of supported flashlight modes for the given [mediaStream].

@@ -33,8 +33,8 @@ class MobileScannerWeb extends MobileScannerPlatform {
   /// This container element is used by the barcode reader.
   HTMLDivElement? _divElement;
 
-  /// The stream controller for the media track constraints stream.
-  final StreamController<MediaTrackConstraints> _constraintsController = StreamController.broadcast();
+  /// The stream controller for the media track settings stream.
+  final StreamController<MediaTrackSettings> _settingsController = StreamController.broadcast();
 
   /// The view type for the platform view factory.
   final String _viewType = 'MobileScannerWeb';
@@ -46,12 +46,12 @@ class MobileScannerWeb extends MobileScannerPlatform {
   @override
   Stream<BarcodeCapture?> get barcodesStream => _barcodesController.stream;
 
-  void _handleMediaTrackConstraintsChange(MediaTrackConstraints constraints) {
-    if (_constraintsController.isClosed) {
+  void _handleMediaTrackSettingsChange(MediaTrackSettings settings) {
+    if (_settingsController.isClosed) {
       return;
     }
 
-    _constraintsController.add(constraints);
+    _settingsController.add(settings);
   }
 
   @override
@@ -97,8 +97,8 @@ class MobileScannerWeb extends MobileScannerPlatform {
       // Clear the existing barcodes.
       _barcodesController.add(const BarcodeCapture());
 
-      // Listen for changes to the media track constraints.
-      _barcodeReader.setMediaTrackConstraintsListener(_handleMediaTrackConstraintsChange);
+      // Listen for changes to the media track settings.
+      _barcodeReader.setMediaTrackSettingsListener(_handleMediaTrackSettingsChange);
 
       await _barcodeReader.start(
         startOptions,
@@ -184,7 +184,7 @@ class MobileScannerWeb extends MobileScannerPlatform {
 
     await stop();
     await _barcodesController.close();
-    await _constraintsController.close();
+    await _settingsController.close();
 
     // Finally, remove the video element from the DOM.
     try {

@@ -18,8 +18,8 @@ import 'package:web/web.dart' as web;
 final class ZXingBarcodeReader extends BarcodeReader {
   ZXingBarcodeReader();
 
-  /// The listener for media track constraints changes.
-  void Function(web.MediaTrackConstraints)? _onMediaTrackConstraintsChanged;
+  /// The listener for media track settings changes.
+  void Function(web.MediaTrackSettings)? _onMediaTrackSettingsChanged;
 
   /// The internal media stream track constraints delegate.
   final MediaTrackConstraintsDelegate _mediaTrackConstraintsDelegate = const MediaTrackConstraintsDelegate();
@@ -139,10 +139,10 @@ final class ZXingBarcodeReader extends BarcodeReader {
 
       await result?.toDart;
 
-      final web.MediaTrackConstraints? constraints = _mediaTrackConstraintsDelegate.getConstraints(stream);
+      final web.MediaTrackSettings? settings = _mediaTrackConstraintsDelegate.getSettings(stream);
 
-      if (constraints != null) {
-        _onMediaTrackConstraintsChanged?.call(constraints);
+      if (settings != null) {
+        _onMediaTrackSettingsChanged?.call(settings);
       }
     }
   }
@@ -193,8 +193,8 @@ final class ZXingBarcodeReader extends BarcodeReader {
   }
 
   @override
-  void setMediaTrackConstraintsListener(void Function(web.MediaTrackConstraints) listener) {
-    _onMediaTrackConstraintsChanged ??= listener;
+  void setMediaTrackSettingsListener(void Function(web.MediaTrackSettings) listener) {
+    _onMediaTrackSettingsChanged ??= listener;
   }
 
   @override
@@ -212,10 +212,10 @@ final class ZXingBarcodeReader extends BarcodeReader {
 
         await _mediaTrackConstraintsDelegate.setFlashlightState(mediaStream, value);
 
-        final web.MediaTrackConstraints? constraints = _mediaTrackConstraintsDelegate.getConstraints(mediaStream);
+        final web.MediaTrackSettings? settings = _mediaTrackConstraintsDelegate.getSettings(mediaStream);
 
-        if (constraints != null) {
-          _onMediaTrackConstraintsChanged?.call(constraints);
+        if (settings != null) {
+          _onMediaTrackSettingsChanged?.call(settings);
         }
     }
   }
@@ -254,7 +254,7 @@ final class ZXingBarcodeReader extends BarcodeReader {
 
   @override
   Future<void> stop() async {
-    _onMediaTrackConstraintsChanged = null;
+    _onMediaTrackSettingsChanged = null;
     _reader?.stopContinuousDecode.callAsFunction();
     _reader?.reset.callAsFunction();
     _reader = null;