[camera_avfoundation] Implementation swift migration - part 2

packages/camera/camera_avfoundation/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.9.18+15
+
+* Migrates the CameraPlugin class to Swift.
+
 ## 0.9.18+14
 
 * Creates Swift Package Manager target for Swift implementation.

packages/camera/camera_avfoundation/example/ios/Runner.xcodeproj/project.pbxproj

@@ -36,7 +36,6 @@
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
 		97DB234D2D566D0700CEFE66 /* CameraPreviewPauseTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 97DB234C2D566D0700CEFE66 /* CameraPreviewPauseTests.swift */; };
-		E0CDBAC227CD9729002561D9 /* QueueTestUtils.m in Sources */ = {isa = PBXBuildFile; fileRef = E0CDBAC127CD9729002561D9 /* QueueTestUtils.m */; };
 		E11D6A8F2D81B81D0031E6C5 /* MockCaptureVideoDataOutput.swift in Sources */ = {isa = PBXBuildFile; fileRef = E11D6A8E2D81B81D0031E6C5 /* MockCaptureVideoDataOutput.swift */; };
 		E11D6A912D82C7740031E6C5 /* FLTCamExposureTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = E11D6A902D82C7740031E6C5 /* FLTCamExposureTests.swift */; };
 		E12C4FF62D68C69000515E70 /* CameraPluginDelegatingMethodTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = E12C4FF52D68C69000515E70 /* CameraPluginDelegatingMethodTests.swift */; };
@@ -131,8 +130,6 @@
 		9DDC4CE84A8B378AE4A8CD9C /* libPods-RunnerTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-RunnerTests.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		A8F314CD1C64E9257EBC811D /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 		B61D98BBC8FB276D1C4A7BB2 /* Pods-RunnerTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.debug.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.debug.xcconfig"; sourceTree = "<group>"; };
-		E0CDBAC027CD9729002561D9 /* QueueTestUtils.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = QueueTestUtils.h; sourceTree = "<group>"; };
-		E0CDBAC127CD9729002561D9 /* QueueTestUtils.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = QueueTestUtils.m; sourceTree = "<group>"; };
 		E11D6A8E2D81B81D0031E6C5 /* MockCaptureVideoDataOutput.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockCaptureVideoDataOutput.swift; sourceTree = "<group>"; };
 		E11D6A902D82C7740031E6C5 /* FLTCamExposureTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FLTCamExposureTests.swift; sourceTree = "<group>"; };
 		E12C4FF52D68C69000515E70 /* CameraPluginDelegatingMethodTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CameraPluginDelegatingMethodTests.swift; sourceTree = "<group>"; };
@@ -147,12 +144,12 @@
 		E142F13F2D85AD7900824824 /* MockCaptureConnection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockCaptureConnection.swift; sourceTree = "<group>"; };
 		E142F1412D85AFA400824824 /* MockGlobalEventApi.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockGlobalEventApi.swift; sourceTree = "<group>"; };
 		E15139172D80980900FEE47B /* FLTCamSetDeviceOrientationTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FLTCamSetDeviceOrientationTests.swift; sourceTree = "<group>"; };
+		E15BC7E32D86D08700F66474 /* MockFlutterTextureRegistry.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockFlutterTextureRegistry.swift; sourceTree = "<group>"; };
+		E15BC7E52D86D17D00F66474 /* MockFlutterBinaryMessenger.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockFlutterBinaryMessenger.swift; sourceTree = "<group>"; };
 		E15BC7E72D86D29F00F66474 /* MockAssetWriter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockAssetWriter.swift; sourceTree = "<group>"; };
 		E15BC7E92D86D41F00F66474 /* MockAssetWriterInput.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockAssetWriterInput.swift; sourceTree = "<group>"; };
 		E15BC7EB2D86D50200F66474 /* MockAssetWriterInputPixelBufferAdaptor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockAssetWriterInputPixelBufferAdaptor.swift; sourceTree = "<group>"; };
 		E15BC7ED2D86D85500F66474 /* MockCaptureDevice.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockCaptureDevice.swift; sourceTree = "<group>"; };
-		E15BC7E32D86D08700F66474 /* MockFlutterTextureRegistry.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockFlutterTextureRegistry.swift; sourceTree = "<group>"; };
-		E15BC7E52D86D17D00F66474 /* MockFlutterBinaryMessenger.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MockFlutterBinaryMessenger.swift; sourceTree = "<group>"; };
 		E16602942D8471C0003CFE12 /* FLTCamZoomTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FLTCamZoomTests.swift; sourceTree = "<group>"; };
 		E1A5F4E22D80259C0005BA64 /* FLTCamSetFlashModeTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FLTCamSetFlashModeTests.swift; sourceTree = "<group>"; };
 		E1ABED702D943DC700AED9CC /* MockCaptureDeviceInputFactory.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MockCaptureDeviceInputFactory.swift; sourceTree = "<group>"; };
@@ -190,8 +187,6 @@
 			children = (
 				7F29EB3F2D281C6D00740257 /* Mocks */,
 				03BB766C2665316900CE5A93 /* Info.plist */,
-				E0CDBAC027CD9729002561D9 /* QueueTestUtils.h */,
-				E0CDBAC127CD9729002561D9 /* QueueTestUtils.m */,
 				E142681E2D8566230046CBBC /* CameraTestUtils.swift */,
 				979B3DF92D5B6BA2009BDE1A /* ExceptionCatcher.h */,
 				979B3DFA2D5B6BC7009BDE1A /* ExceptionCatcher.m */,
@@ -565,7 +560,6 @@
 				E15139182D80980900FEE47B /* FLTCamSetDeviceOrientationTests.swift in Sources */,
 				972CA92B2D5A1D8C004B846F /* CameraPropertiesTests.swift in Sources */,
 				E15BC7E42D86D08700F66474 /* MockFlutterTextureRegistry.swift in Sources */,
-				E0CDBAC227CD9729002561D9 /* QueueTestUtils.m in Sources */,
 				978296CF2D5F744B0009BDD3 /* PhotoCaptureTests.swift in Sources */,
 				979B3E002D5B9E6C009BDE1A /* CameraMethodChannelTests.swift in Sources */,
 				E142F13C2D8596F100824824 /* MockCaptureDeviceFormat.swift in Sources */,

packages/camera/camera_avfoundation/example/ios/RunnerTests/AvailableCamerasTests.swift

@@ -23,7 +23,8 @@ final class AvailableCamerasTest: XCTestCase {
       permissionManager: MockFLTCameraPermissionManager(),
       deviceFactory: { _ in MockCaptureDevice() },
       captureSessionFactory: { MockCaptureSession() },
-      captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+      captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+      captureSessionQueue: DispatchQueue(label: "io.flutter.camera.captureSessionQueue")
     )
   }
 

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraCaptureSessionQueueRaceConditionTests.swift

@@ -12,21 +12,26 @@ import XCTest
 #endif
 
 final class CameraCaptureSessionQueueRaceConditionTests: XCTestCase {
-  private func createCameraPlugin() -> CameraPlugin {
-    return CameraPlugin(
+  private func createCameraPlugin() -> (CameraPlugin, DispatchQueue) {
+    let captureSessionQueue = DispatchQueue(label: "io.flutter.camera.captureSessionQueue")
+
+    let cameraPlugin = CameraPlugin(
       registry: MockFlutterTextureRegistry(),
       messenger: MockFlutterBinaryMessenger(),
       globalAPI: MockGlobalEventApi(),
       deviceDiscoverer: MockCameraDeviceDiscoverer(),
       permissionManager: MockFLTCameraPermissionManager(),
       deviceFactory: { _ in MockCaptureDevice() },
       captureSessionFactory: { MockCaptureSession() },
-      captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+      captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+      captureSessionQueue: captureSessionQueue
     )
+
+    return (cameraPlugin, captureSessionQueue)
   }
 
   func testFixForCaptureSessionQueueNullPointerCrashDueToRaceCondition() {
-    let cameraPlugin = createCameraPlugin()
+    let (cameraPlugin, captureSessionQueue) = createCameraPlugin()
     let disposeExpectation = expectation(description: "dispose's result block must be called")
     let createExpectation = expectation(description: "create's result block must be called")
 
@@ -55,6 +60,6 @@ final class CameraCaptureSessionQueueRaceConditionTests: XCTestCase {
     // `captureSessionQueue` passed into `AVCaptureVideoDataOutput::setSampleBufferDelegate:queue:`
     // API will cause a crash.
     XCTAssertNotNil(
-      cameraPlugin.captureSessionQueue, "captureSessionQueue must not be nil after create method.")
+      captureSessionQueue, "captureSessionQueue must not be nil after create method.")
   }
 }

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraMethodChannelTests.swift

@@ -22,7 +22,8 @@ final class CameraMethodChannelTests: XCTestCase {
       permissionManager: MockFLTCameraPermissionManager(),
       deviceFactory: { _ in MockCaptureDevice() },
       captureSessionFactory: { session },
-      captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+      captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+      captureSessionQueue: DispatchQueue(label: "io.flutter.camera.captureSessionQueue")
     )
   }
 

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraOrientationTests.swift

@@ -23,12 +23,14 @@ private final class MockUIDevice: UIDevice {
 
 final class CameraOrientationTests: XCTestCase {
   private func createCameraPlugin() -> (
-    CameraPlugin, MockFLTCam, MockGlobalEventApi, MockCaptureDevice, MockCameraDeviceDiscoverer
+    CameraPlugin, MockFLTCam, MockGlobalEventApi, MockCaptureDevice, MockCameraDeviceDiscoverer,
+    DispatchQueue
   ) {
     let mockDevice = MockCaptureDevice()
     let mockCamera = MockFLTCam()
     let mockEventAPI = MockGlobalEventApi()
     let mockDeviceDiscoverer = MockCameraDeviceDiscoverer()
+    let captureSessionQueue = DispatchQueue(label: "io.flutter.camera.captureSessionQueue")
 
     let cameraPlugin = CameraPlugin(
       registry: MockFlutterTextureRegistry(),
@@ -38,11 +40,14 @@ final class CameraOrientationTests: XCTestCase {
       permissionManager: MockFLTCameraPermissionManager(),
       deviceFactory: { _ in mockDevice },
       captureSessionFactory: { MockCaptureSession() },
-      captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+      captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+      captureSessionQueue: captureSessionQueue
     )
     cameraPlugin.camera = mockCamera
 
-    return (cameraPlugin, mockCamera, mockEventAPI, mockDevice, mockDeviceDiscoverer)
+    return (
+      cameraPlugin, mockCamera, mockEventAPI, mockDevice, mockDeviceDiscoverer, captureSessionQueue
+    )
   }
 
   private func waitForRoundTrip(with queue: DispatchQueue) {
@@ -55,9 +60,12 @@ final class CameraOrientationTests: XCTestCase {
     waitForExpectations(timeout: 30, handler: nil)
   }
 
-  private func sendOrientation(_ orientation: UIDeviceOrientation, to cameraPlugin: CameraPlugin) {
+  private func sendOrientation(
+    _ orientation: UIDeviceOrientation, to cameraPlugin: CameraPlugin,
+    captureSessionQueue: DispatchQueue
+  ) {
     cameraPlugin.orientationChanged(createMockNotification(for: orientation))
-    waitForRoundTrip(with: cameraPlugin.captureSessionQueue)
+    waitForRoundTrip(with: captureSessionQueue)
   }
 
   private func createMockNotification(for deviceOrientation: UIDeviceOrientation) -> Notification {
@@ -67,36 +75,36 @@ final class CameraOrientationTests: XCTestCase {
   }
 
   func testOrientationNotifications() {
-    let (cameraPlugin, _, mockEventAPI, _, _) = createCameraPlugin()
+    let (cameraPlugin, _, mockEventAPI, _, _, captureSessionQueue) = createCameraPlugin()
 
-    sendOrientation(.portraitUpsideDown, to: cameraPlugin)
+    sendOrientation(.portraitUpsideDown, to: cameraPlugin, captureSessionQueue: captureSessionQueue)
     XCTAssertEqual(mockEventAPI.lastOrientation, .portraitDown)
-    sendOrientation(.portrait, to: cameraPlugin)
+    sendOrientation(.portrait, to: cameraPlugin, captureSessionQueue: captureSessionQueue)
     XCTAssertEqual(mockEventAPI.lastOrientation, .portraitUp)
-    sendOrientation(.landscapeLeft, to: cameraPlugin)
+    sendOrientation(.landscapeLeft, to: cameraPlugin, captureSessionQueue: captureSessionQueue)
     XCTAssertEqual(mockEventAPI.lastOrientation, .landscapeLeft)
-    sendOrientation(.landscapeRight, to: cameraPlugin)
+    sendOrientation(.landscapeRight, to: cameraPlugin, captureSessionQueue: captureSessionQueue)
     XCTAssertEqual(mockEventAPI.lastOrientation, .landscapeRight)
   }
 
   func testOrientationNotificationsNotCalledForFaceUp() {
-    let (cameraPlugin, _, mockEventAPI, _, _) = createCameraPlugin()
-    sendOrientation(.faceUp, to: cameraPlugin)
+    let (cameraPlugin, _, mockEventAPI, _, _, captureSessionQueue) = createCameraPlugin()
+    sendOrientation(.faceUp, to: cameraPlugin, captureSessionQueue: captureSessionQueue)
     XCTAssertFalse(mockEventAPI.deviceOrientationChangedCalled)
   }
 
   func testOrientationNotificationsNotCalledForFaceDown() {
-    let (cameraPlugin, _, mockEventAPI, _, _) = createCameraPlugin()
-    sendOrientation(.faceDown, to: cameraPlugin)
+    let (cameraPlugin, _, mockEventAPI, _, _, captureSessionQueue) = createCameraPlugin()
+    sendOrientation(.faceDown, to: cameraPlugin, captureSessionQueue: captureSessionQueue)
     XCTAssertFalse(mockEventAPI.deviceOrientationChangedCalled)
   }
 
   func testOrientationUpdateMustBeOnCaptureSessionQueue() {
     let queueExpectation = expectation(
       description: "Orientation update must happen on the capture session queue")
-    let (cameraPlugin, mockCamera, _, _, _) = createCameraPlugin()
+    let (cameraPlugin, mockCamera, _, _, _, captureSessionQueue) = createCameraPlugin()
     let captureSessionQueueSpecific = DispatchSpecificKey<Void>()
-    cameraPlugin.captureSessionQueue.setSpecific(
+    captureSessionQueue.setSpecific(
       key: captureSessionQueueSpecific,
       value: ())
 
@@ -111,7 +119,7 @@ final class CameraOrientationTests: XCTestCase {
   }
 
   func testOrientationChangedNoRetainCycle() {
-    let (_, mockCamera, mockEventAPI, mockDevice, mockDeviceDiscoverer) = createCameraPlugin()
+    let (_, mockCamera, mockEventAPI, mockDevice, mockDeviceDiscoverer, _) = createCameraPlugin()
     let captureSessionQueue = DispatchQueue(label: "capture_session_queue")
     weak var weakPlugin: CameraPlugin?
     weak var weakDevice = mockDevice
@@ -125,10 +133,10 @@ final class CameraOrientationTests: XCTestCase {
         permissionManager: MockFLTCameraPermissionManager(),
         deviceFactory: { _ in weakDevice! },
         captureSessionFactory: { MockCaptureSession() },
-        captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+        captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+        captureSessionQueue: captureSessionQueue
       )
       weakPlugin = cameraPlugin
-      cameraPlugin.captureSessionQueue = captureSessionQueue
       cameraPlugin.camera = mockCamera
 
       cameraPlugin.orientationChanged(createMockNotification(for: .landscapeLeft))

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraPluginCreateCameraTests.swift

@@ -26,7 +26,8 @@ final class CameraPluginCreateCameraTests: XCTestCase {
       permissionManager: mockPermissionManager,
       deviceFactory: { _ in MockCaptureDevice() },
       captureSessionFactory: { mockCaptureSession },
-      captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+      captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+      captureSessionQueue: DispatchQueue(label: "io.flutter.camera.captureSessionQueue")
     )
 
     return (cameraPlugin, mockPermissionManager, mockCaptureSession)

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraPluginDelegatingMethodTests.swift

@@ -24,7 +24,8 @@ final class CameraPluginDelegatingMethodTests: XCTestCase {
       permissionManager: MockFLTCameraPermissionManager(),
       deviceFactory: { _ in MockCaptureDevice() },
       captureSessionFactory: { MockCaptureSession() },
-      captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+      captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+      captureSessionQueue: DispatchQueue(label: "io.flutter.camera.captureSessionQueue")
     )
     cameraPlugin.camera = mockCamera
 

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraPluginInitializeCameraTests.swift

@@ -13,10 +13,11 @@ import XCTest
 
 final class CameraPluginInitializeCameraTests: XCTestCase {
   private func createCameraPlugin() -> (
-    CameraPlugin, MockFLTCam, MockGlobalEventApi
+    CameraPlugin, MockFLTCam, MockGlobalEventApi, DispatchQueue
   ) {
     let mockCamera = MockFLTCam()
     let mockGlobalEventApi = MockGlobalEventApi()
+    let captureSessionQueue = DispatchQueue(label: "io.flutter.camera.captureSessionQueue")
 
     let cameraPlugin = CameraPlugin(
       registry: MockFlutterTextureRegistry(),
@@ -26,11 +27,12 @@ final class CameraPluginInitializeCameraTests: XCTestCase {
       permissionManager: MockFLTCameraPermissionManager(),
       deviceFactory: { _ in MockCaptureDevice() },
       captureSessionFactory: { MockCaptureSession() },
-      captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+      captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+      captureSessionQueue: captureSessionQueue
     )
     cameraPlugin.camera = mockCamera
 
-    return (cameraPlugin, mockCamera, mockGlobalEventApi)
+    return (cameraPlugin, mockCamera, mockGlobalEventApi, captureSessionQueue)
   }
 
   private func waitForRoundTrip(with queue: DispatchQueue) {
@@ -44,7 +46,7 @@ final class CameraPluginInitializeCameraTests: XCTestCase {
   }
 
   func testInitializeCamera_setsCameraOnFrameAvailableCallback() {
-    let (cameraPlugin, mockCamera, _) = createCameraPlugin()
+    let (cameraPlugin, mockCamera, _, _) = createCameraPlugin()
     let expectation = expectation(description: "Initialization completed")
 
     var onFrameAvailableSet = false
@@ -64,7 +66,7 @@ final class CameraPluginInitializeCameraTests: XCTestCase {
   }
 
   func testInitializeCamera_setsCameraDartAPI() {
-    let (cameraPlugin, mockCamera, _) = createCameraPlugin()
+    let (cameraPlugin, mockCamera, _, _) = createCameraPlugin()
     let expectation = expectation(description: "Initialization completed")
 
     var dartAPISet = false
@@ -84,20 +86,20 @@ final class CameraPluginInitializeCameraTests: XCTestCase {
   }
 
   func testInitializeCamera_sendsDeviceOrientation() {
-    let (cameraPlugin, _, mockGlobalEventApi) = createCameraPlugin()
+    let (cameraPlugin, _, mockGlobalEventApi, captureSessionQueue) = createCameraPlugin()
 
     cameraPlugin.initializeCamera(0, withImageFormat: FCPPlatformImageFormatGroup.bgra8888) {
       error in
       XCTAssertNil(error)
     }
 
-    waitForRoundTrip(with: cameraPlugin.captureSessionQueue)
+    waitForRoundTrip(with: captureSessionQueue)
 
     XCTAssertTrue(mockGlobalEventApi.deviceOrientationChangedCalled)
   }
 
   func testInitializeCamera_startsCamera() {
-    let (cameraPlugin, mockCamera, _) = createCameraPlugin()
+    let (cameraPlugin, mockCamera, _, _) = createCameraPlugin()
     let expectation = expectation(description: "Initialization completed")
 
     var startCalled = false

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraSettingsTests.swift

@@ -163,7 +163,8 @@ final class CameraSettingsTests: XCTestCase {
       permissionManager: MockFLTCameraPermissionManager(),
       deviceFactory: { _ in mockDevice },
       captureSessionFactory: { mockSession },
-      captureDeviceInputFactory: MockCaptureDeviceInputFactory()
+      captureDeviceInputFactory: MockCaptureDeviceInputFactory(),
+      captureSessionQueue: DispatchQueue(label: "io.flutter.camera.captureSessionQueue")
     )
 
     let expectation = self.expectation(description: "Result finished")