feat: support FocusMode/ExposureMode for camera capture options.

example/lib/theme.dart

@@ -44,7 +44,7 @@ class LiveKitTheme {
             // backgroundColor: WidgetStateProperty.all<Color>(accentColor),
             backgroundColor: WidgetStateProperty.resolveWith((states) {
               if (states.contains(WidgetState.disabled)) {
-                return accentColor.withOpacity(0.5);
+                return accentColor.withValues(alpha: 0.5);
               }
               return accentColor;
             }),
@@ -59,13 +59,13 @@ class LiveKitTheme {
             if (states.contains(WidgetState.selected)) {
               return accentColor;
             }
-            return accentColor.withOpacity(0.3);
+            return accentColor.withValues(alpha: 0.3);
           }),
           thumbColor: WidgetStateProperty.resolveWith((states) {
             if (states.contains(WidgetState.selected)) {
               return Colors.white;
             }
-            return Colors.white.withOpacity(0.3);
+            return Colors.white.withValues(alpha: 0.3);
           }),
         ),
         dialogTheme: DialogTheme(
@@ -87,7 +87,7 @@ class LiveKitTheme {
             color: LKColors.lkBlue,
           ),
           hintStyle: TextStyle(
-            color: LKColors.lkBlue.withOpacity(.5),
+            color: LKColors.lkBlue.withValues(alpha: 5),
           ),
           enabledBorder: InputBorder.none,
           focusedBorder: InputBorder.none,

example/lib/widgets/participant.dart

@@ -176,19 +176,19 @@ abstract class _ParticipantWidgetState<T extends ParticipantWidget>
                   right: 30,
                   child: ParticipantStatsWidget(
                     participant: widget.participant,
-                  )), 
-           if(activeAudioTrack != null && !activeAudioTrack!.muted) Positioned(
-            top: 10,
-            right: 10,
-            left: 10,
-            bottom: 10,
-            child: SoundWaveformWidget(
-              key: ValueKey(activeAudioTrack!.hashCode),
-              audioTrack: activeAudioTrack!,
-              width: 8,
-            ),
-          ),
-
+                  )),
+            if (activeAudioTrack != null && !activeAudioTrack!.muted)
+              Positioned(
+                top: 10,
+                right: 10,
+                left: 10,
+                bottom: 10,
+                child: SoundWaveformWidget(
+                  key: ValueKey(activeAudioTrack!.hashCode),
+                  audioTrack: activeAudioTrack!,
+                  width: 8,
+                ),
+              ),
           ],
         ),
       );
@@ -279,7 +279,7 @@ class RemoteTrackPublicationMenuWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) => Material(
-        color: Colors.black.withOpacity(0.3),
+        color: Colors.black.withValues(alpha: 0.3),
         child: PopupMenuButton<Function>(
           tooltip: 'Subscribe menu',
           icon: Icon(icon,
@@ -317,7 +317,7 @@ class RemoteTrackFPSMenuWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) => Material(
-        color: Colors.black.withOpacity(0.3),
+        color: Colors.black.withValues(alpha: 0.3),
         child: PopupMenuButton<Function>(
           tooltip: 'Preferred FPS',
           icon: Icon(icon, color: Colors.white),
@@ -351,7 +351,7 @@ class RemoteTrackQualityMenuWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) => Material(
-        color: Colors.black.withOpacity(0.3),
+        color: Colors.black.withValues(alpha: 0.3),
         child: PopupMenuButton<Function>(
           tooltip: 'Preferred Quality',
           icon: Icon(icon, color: Colors.white),
@@ -373,4 +373,3 @@ class RemoteTrackQualityMenuWidget extends StatelessWidget {
         ),
       );
 }
-

example/lib/widgets/participant_info.dart

@@ -43,7 +43,7 @@ class ParticipantInfoWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) => Container(
-        color: Colors.black.withOpacity(0.3),
+        color: Colors.black.withValues(alpha: 0.3),
         padding: const EdgeInsets.symmetric(
           vertical: 7,
           horizontal: 10,

example/lib/widgets/participant_stats.dart

@@ -148,7 +148,7 @@ class _ParticipantStatsWidgetState extends State<ParticipantStatsWidget> {
   @override
   Widget build(BuildContext context) {
     return Container(
-      color: Colors.black.withOpacity(0.3),
+      color: Colors.black.withValues(alpha: 0.3),
       padding: const EdgeInsets.symmetric(
         vertical: 8,
         horizontal: 8,

example/lib/widgets/text_field.dart

@@ -31,7 +31,7 @@ class LKTextField extends StatelessWidget {
             decoration: BoxDecoration(
               border: Border.all(
                 width: 1,
-                color: Colors.white.withOpacity(.3),
+                color: Colors.white.withValues(alpha: .3),
               ),
               borderRadius: BorderRadius.circular(8),
             ),

lib/src/core/engine.dart

@@ -1082,12 +1082,10 @@ extension EnginePrivateMethods on Engine {
 
 extension EngineInternalMethods on Engine {
   @internal
-  List<lk_rtc.DataChannelInfo> dataChannelInfo() =>
-      [_reliableDCPub, _lossyDCPub]
-          .whereNotNull()
-          .where((e) => e.id != -1)
-          .map((e) => e.toLKInfoType())
-          .toList();
+  List<lk_rtc.DataChannelInfo> dataChannelInfo() => [
+        _reliableDCPub,
+        _lossyDCPub
+      ].nonNulls.where((e) => e.id != -1).map((e) => e.toLKInfoType()).toList();
   @internal
   Future<rtc.RTCRtpSender> createSimulcastTransceiverSender(
     LocalVideoTrack track,

lib/src/publication/remote.dart

@@ -17,7 +17,6 @@ import 'dart:math';
 
 import 'package:flutter/widgets.dart';
 
-import 'package:collection/collection.dart';
 import 'package:meta/meta.dart';
 
 import '../core/signal_client.dart';
@@ -155,9 +154,9 @@ class RemoteTrackPublication<T extends RemoteTrack>
     // filter visible build contexts
     final viewSizes = videoTrack.viewKeys
         .map((e) => e.currentContext)
-        .whereNotNull()
+        .nonNulls
         .map((e) => e.findRenderObject() as RenderBox?)
-        .whereNotNull()
+        .nonNulls
         .where((e) => e.hasSize)
         .map((e) => e.size);
 

lib/src/track/options.dart

@@ -25,6 +25,10 @@ enum CameraPosition {
   back,
 }
 
+enum CameraFocusMode { auto, locked }
+
+enum CameraExposureMode { auto, locked }
+
 /// Convenience extension for [CameraPosition].
 extension CameraPositionExt on CameraPosition {
   /// Return a [CameraPosition] which front and back is switched.
@@ -41,8 +45,16 @@ class CameraCaptureOptions extends VideoCaptureOptions {
   /// set to false to only toggle enabled instead of stop/replaceTrack for muting
   final bool stopCameraCaptureOnMute;
 
+  /// The focus mode to use for the camera.
+  final CameraFocusMode focusMode;
+
+  /// The exposure mode to use for the camera.
+  final CameraExposureMode exposureMode;
+
   const CameraCaptureOptions({
     this.cameraPosition = CameraPosition.front,
+    this.focusMode = CameraFocusMode.auto,
+    this.exposureMode = CameraExposureMode.auto,
     String? deviceId,
     double? maxFrameRate,
     VideoParameters params = VideoParametersPresets.h720_169,
@@ -55,6 +67,8 @@ class CameraCaptureOptions extends VideoCaptureOptions {
 
   CameraCaptureOptions.from({required VideoCaptureOptions captureOptions})
       : cameraPosition = CameraPosition.front,
+        focusMode = CameraFocusMode.auto,
+        exposureMode = CameraExposureMode.auto,
         stopCameraCaptureOnMute = true,
         super(
           params: captureOptions.params,

lib/src/widgets/video_track_renderer.dart

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+import 'dart:math';
+
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
@@ -77,6 +79,25 @@ class _VideoTrackRendererState extends State<VideoTrackRenderer> {
     return _renderer!;
   }
 
+  void setZoom(double zoomLevel) async {
+    final videoTrack = _renderer?.srcObject!.getVideoTracks().first;
+    if (videoTrack == null) return;
+    await rtc.Helper.setZoom(videoTrack, zoomLevel);
+  }
+
+  void onViewFinderTap(TapDownDetails details, BoxConstraints constraints) {
+    final videoTrack = _renderer?.srcObject!.getVideoTracks().first;
+    if (videoTrack == null) return;
+
+    final point = Point<double>(
+      details.localPosition.dx / constraints.maxWidth,
+      details.localPosition.dy / constraints.maxHeight,
+    );
+
+    rtc.Helper.setFocusPoint(videoTrack, point);
+    rtc.Helper.setExposurePoint(videoTrack, point);
+  }
+
   void disposeRenderer() {
     try {
       _renderer?.srcObject = null;
@@ -158,6 +179,28 @@ class _VideoTrackRendererState extends State<VideoTrackRenderer> {
           },
         );
 
+  Widget _videoRendererView() {
+    if (lkPlatformIs(PlatformType.iOS) &&
+        [VideoRenderMode.auto, VideoRenderMode.platformView]
+            .contains(widget.renderMode)) {
+      return rtc.RTCVideoPlatFormView(
+        mirror: _shouldMirror(),
+        objectFit: widget.fit,
+        onViewReady: (controller) {
+          _renderer = controller;
+          _renderer?.srcObject = widget.track.mediaStream;
+          _attach();
+        },
+      );
+    }
+    return rtc.RTCVideoView(
+      _renderer! as rtc.RTCVideoRenderer,
+      mirror: _shouldMirror(),
+      filterQuality: FilterQuality.medium,
+      objectFit: widget.fit,
+    );
+  }
+
   Widget _videoViewForNative() => FutureBuilder(
       future: _initializeRenderer(),
       builder: (context, snapshot) {
@@ -172,24 +215,24 @@ class _VideoTrackRendererState extends State<VideoTrackRenderer> {
                   ?.addPostFrameCallback((timeStamp) {
                 widget.track.onVideoViewBuild?.call(_internalKey);
               });
-              if (lkPlatformIs(PlatformType.iOS) &&
-                  [VideoRenderMode.auto, VideoRenderMode.platformView]
-                      .contains(widget.renderMode)) {
-                return rtc.RTCVideoPlatFormView(
-                  mirror: _shouldMirror(),
-                  objectFit: widget.fit,
-                  onViewReady: (controller) {
-                    _renderer = controller;
-                    _renderer?.srcObject = widget.track.mediaStream;
-                    _attach();
-                  },
-                );
+
+              if (!lkPlatformIsMobile() || widget.track is! LocalVideoTrack) {
+                return _videoRendererView();
               }
-              return rtc.RTCVideoView(
-                _renderer! as rtc.RTCVideoRenderer,
-                mirror: _shouldMirror(),
-                filterQuality: FilterQuality.medium,
-                objectFit: widget.fit,
+              return LayoutBuilder(
+                builder: (BuildContext context, BoxConstraints constraints) {
+                  return GestureDetector(
+                    onScaleStart: (details) {},
+                    onScaleUpdate: (details) {
+                      if (details.scale != 1.0) {
+                        setZoom(details.scale);
+                      }
+                    },
+                    onTapDown: (TapDownDetails details) =>
+                        onViewFinderTap(details, constraints),
+                    child: _videoRendererView(),
+                  );
+                },
               );
             },
           );

pubspec.yaml

@@ -37,7 +37,7 @@ dependencies:
   uuid: '>=3.0.6'
   synchronized: ^3.0.0+3
   protobuf: ^3.0.0
-  flutter_webrtc: ^0.12.3
+  flutter_webrtc: ^0.12.4
   device_info_plus: ^11.1.1
   js: '>=0.6.4'
   platform_detect: ^2.0.7