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/android/src/main/java/com/mrousavy/camera/core/CameraSession.kt

@@ -65,6 +65,7 @@ class CameraSession(private val context: Context, private val cameraManager: Cam
 
   // Camera Configuration
   private var configuration: CameraConfiguration? = null
+  private var currentConfigureCall: Long = System.currentTimeMillis()
 
   // Camera State
   private var captureSession: CameraCaptureSession? = null
@@ -112,15 +113,26 @@ class CameraSession(private val context: Context, private val cameraManager: Cam
     }
 
   suspend fun configure(lambda: (configuration: CameraConfiguration) -> Unit) {
+    // This is the latest call to configure()
+    val now = System.currentTimeMillis()
+    currentConfigureCall = now
+
+    Log.i(TAG, "Updating CameraSession Configuration...")
+
+    // Let caller configure a new configuration for the Camera.
+    val config = CameraConfiguration.copyOf(this.configuration)
+    lambda(config)
+    val diff = CameraConfiguration.difference(this.configuration, config)
+
+    if (!diff.hasAnyDifference) {
+      Log.w(TAG, "Called configure(...) but nothing changed...")
+      return
+    }
+
     mutex.withLock {
-      Log.i(TAG, "Updating CameraSession Configuration...")
-
-      val config = CameraConfiguration.copyOf(this.configuration)
-      lambda(config)
-      val diff = CameraConfiguration.difference(this.configuration, config)
-
-      if (!diff.hasAnyDifference) {
-        Log.w(TAG, "Called configure(...) but nothing changed...")
+      // Cancel configuration if there has already been a new config
+      if (currentConfigureCall != now) {
+        // configure() has been called again just now, skip this one so the new call takes over.
         return
       }