feat: Concurrent/Cancellable configure (#2282)

* feat: Cancellable `configure`

* Android

* Update Podfile.lock

* Configure outside of lock

* Update lockfiles

* Use `bundle` for CI

* Update script

* Update Podfile.lock

* fix: Set config at end

* Lint

package/ios/Core/CameraSession.swift

@@ -16,6 +16,7 @@ import Foundation
 class CameraSession: NSObject, AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAudioDataOutputSampleBufferDelegate {
   // Configuration
   var configuration: CameraConfiguration?
+  var currentConfigureCall: DispatchTime = .now()
   // Capture Session
   let captureSession = AVCaptureSession()
   let audioCaptureSession = AVCaptureSession()
@@ -98,6 +99,10 @@ class CameraSession: NSObject, AVCaptureVideoDataOutputSampleBufferDelegate, AVC
    The `configuration` object is a copy of the currently active configuration that can be modified by the caller in the lambda.
    */
   func configure(_ lambda: (_ configuration: CameraConfiguration) throws -> Void) {
+    // This is the latest call to configure()
+    let time = DispatchTime.now()
+    currentConfigureCall = time
+
     ReactLogger.log(level: .info, message: "Updating Session Configuration...")
 
     // Let caller configure a new configuration for the Camera.
@@ -109,8 +114,14 @@ class CameraSession: NSObject, AVCaptureVideoDataOutputSampleBufferDelegate, AVC
     }
     let difference = CameraConfiguration.Difference(between: configuration, and: config)
 
-    // Set up Camera (Video) Capture Session (on camera queue)
+    // Set up Camera (Video) Capture Session (on camera queue, acts like a lock)
     CameraQueues.cameraQueue.async {
+      // Cancel configuration if there has already been a new config
+      guard self.currentConfigureCall == time else {
+        // configure() has been called again just now, skip this one so the new call takes over.
+        return
+      }
+
       do {
         // If needed, configure the AVCaptureSession (inputs, outputs)
         if difference.isSessionConfigurationDirty {
@@ -175,32 +186,32 @@ class CameraSession: NSObject, AVCaptureVideoDataOutputSampleBufferDelegate, AVC
         if difference.inputChanged {
           self.delegate?.onSessionInitialized()
         }
+
+        // After configuring, set this to the new configuration.
+        self.configuration = config
       } catch {
         self.onConfigureError(error)
       }
-    }
 
-    // Set up Audio Capture Session (on audio queue)
-    if difference.audioSessionChanged {
-      CameraQueues.audioQueue.async {
-        do {
-          // Lock Capture Session for configuration
-          ReactLogger.log(level: .info, message: "Beginning AudioSession configuration...")
-          self.audioCaptureSession.beginConfiguration()
+      // Set up Audio Capture Session (on audio queue)
+      if difference.audioSessionChanged {
+        CameraQueues.audioQueue.async {
+          do {
+            // Lock Capture Session for configuration
+            ReactLogger.log(level: .info, message: "Beginning AudioSession configuration...")
+            self.audioCaptureSession.beginConfiguration()
 
-          try self.configureAudioSession(configuration: config)
+            try self.configureAudioSession(configuration: config)
 
-          // Unlock Capture Session again and submit configuration to Hardware
-          self.audioCaptureSession.commitConfiguration()
-          ReactLogger.log(level: .info, message: "Committed AudioSession configuration!")
-        } catch {
-          self.onConfigureError(error)
+            // Unlock Capture Session again and submit configuration to Hardware
+            self.audioCaptureSession.commitConfiguration()
+            ReactLogger.log(level: .info, message: "Committed AudioSession configuration!")
+          } catch {
+            self.onConfigureError(error)
+          }
         }
       }
     }
-
-    // After configuring, set this to the new configuration.
-    configuration = config
   }
 
   /**