[camera] flip/change camera while recording - platform interface

packages/camera/camera_platform_interface/CHANGELOG.md

@@ -1,5 +1,6 @@
-## NEXT
+## 2.4.0
 
+* Allows camera to be switched while video recording.
 * Updates minimum Flutter version to 3.0.
 
 ## 2.3.4

packages/camera/camera_platform_interface/lib/src/method_channel/method_channel_camera.dart

@@ -504,6 +504,17 @@ class MethodChannelCamera extends CameraPlatform {
     );
   }
 
+  @override
+  Future<void> setDescriptionWhileRecording(
+      CameraDescription description) async {
+    await _channel.invokeMethod<double>(
+      'setDescriptionWhileRecording',
+      <String, dynamic>{
+        'cameraName': description.name,
+      },
+    );
+  }
+
   @override
   Widget buildPreview(int cameraId) {
     return Texture(textureId: cameraId);

packages/camera/camera_platform_interface/lib/src/platform_interface/camera_platform.dart

@@ -269,6 +269,12 @@ abstract class CameraPlatform extends PlatformInterface {
     throw UnimplementedError('pausePreview() is not implemented.');
   }
 
+  /// Sets the active camera while recording.
+  Future<void> setDescriptionWhileRecording(CameraDescription description) {
+    throw UnimplementedError(
+        'setDescriptionWhileRecording() is not implemented.');
+  }
+
   /// Returns a widget showing a live camera preview.
   Widget buildPreview(int cameraId) {
     throw UnimplementedError('buildView() has not been implemented.');

packages/camera/camera_platform_interface/pubspec.yaml

@@ -4,7 +4,7 @@ repository: https://github.com/flutter/plugins/tree/main/packages/camera/camera_
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.3.4
+version: 2.4.0
 
 environment:
   sdk: '>=2.12.0 <3.0.0'

packages/camera/camera_platform_interface/test/method_channel/method_channel_camera_test.dart

@@ -576,6 +576,29 @@ void main() {
         ]);
       });
 
+      test('Should set description while recording', () async {
+        // Arrange
+        final MethodChannelMock channel = MethodChannelMock(
+          channelName: 'plugins.flutter.io/camera',
+          methods: <String, dynamic>{'setDescriptionWhileRecording': null},
+        );
+
+        // Act
+        const CameraDescription cameraDescription = CameraDescription(
+            name: 'Test',
+            lensDirection: CameraLensDirection.back,
+            sensorOrientation: 0);
+        await camera.setDescriptionWhileRecording(cameraDescription);
+
+        // Assert
+        expect(channel.log, <Matcher>[
+          isMethodCall('setDescriptionWhileRecording',
+              arguments: <String, Object?>{
+                'cameraName': cameraDescription.name
+              }),
+        ]);
+      });
+
       test('Should pass maxVideoDuration when starting recording a video',
           () async {
         // Arrange