feat: Make Frame Processor Plugins object-oriented on iOS as well (#1496)

* feat: Make Frame Processor Plugins object-oriented on iOS as well

* Add Plugin in AppDelegate

docs/docs/guides/FRAME_PROCESSOR_CREATE_PLUGIN_IOS.mdx

@@ -41,29 +41,35 @@ For reference see the [CLI's docs](https://github.com/mateusz1913/vision-camera-
 2. Create an Objective-C source file, for the QR Code Plugin this will be called `QRCodeFrameProcessorPlugin.m`.
 3. Add the following code:
 
-```objc {12}
+```objc
 #import <VisionCamera/FrameProcessorPlugin.h>
 #import <VisionCamera/Frame.h>
 
-@interface QRCodeFrameProcessorPlugin : NSObject
+@interface QRCodeFrameProcessorPlugin : FrameProcessorPlugin
 @end
 
 @implementation QRCodeFrameProcessorPlugin
 
-static inline id scanQRCodes(Frame* frame, NSArray* args) {
+- (NSString *)name {
+  return @"scanQRCodes";
+}
+
+- (id)callback:(Frame *)frame withArguments:(NSArray<id> *)arguments {
   CMSampleBufferRef buffer = frame.buffer;
   UIImageOrientation orientation = frame.orientation;
   // code goes here
   return @[];
 }
 
-VISION_EXPORT_FRAME_PROCESSOR(scanQRCodes)
++ (void) load {
+  [self registerPlugin:[[ExampleFrameProcessorPlugin alloc] init]];
+}
 
 @end
 ```
 
 :::note
-The Frame Processor Plugin will be exposed to JS through the `FrameProcessorPlugins` object using the same name as the Objective-C function. In this case, it would be `FrameProcessorPlugins.scanQRCodes(...)`.
+The Frame Processor Plugin will be exposed to JS through the `FrameProcessorPlugins` object using the name returned from the `name` getter. In this case, it would be `FrameProcessorPlugins.scanQRCodes(...)`.
 :::
 
 4. **Implement your Frame Processing.** See the [Example Plugin (Objective-C)](https://github.com/mrousavy/react-native-vision-camera/blob/main/example/ios/Frame%20Processor%20Plugins/Example%20Plugin%20%28Objective%2DC%29) for reference.
@@ -83,27 +89,16 @@ The Frame Processor Plugin will be exposed to JS through the `FrameProcessorPlug
 #import <VisionCamera/Frame.h>
 ```
 
-4. Create an Objective-C source file with the same name as the Swift file, for the QR Code Plugin this will be `QRCodeFrameProcessorPlugin.m`. Add the following code:
+4. In the Swift file, add the following code:
 
-```objc
+```swift
-#import <VisionCamera/FrameProcessorPlugin.h>
-
-@interface VISION_EXPORT_SWIFT_FRAME_PROCESSOR(scanQRCodes, QRCodeFrameProcessorPlugin)
-@end
-```
-
-:::note
-The first parameter in the Macro specifies the JS function name. Make sure it is unique across other Frame Processors.
-:::
-
-5. In the Swift file, add the following code:
-
-```swift {8}
 @objc(QRCodeFrameProcessorPlugin)
-public class QRCodeFrameProcessorPlugin: NSObject, FrameProcessorPluginBase {
+public class QRCodeFrameProcessorPlugin: FrameProcessorPlugin {
+  override public func name() -> String! {
+    return "scanQRCodes"
+  }
 
-  @objc
+  public override func callback(_ frame: Frame!, withArguments arguments: [Any]!) -> Any! {
-  public static func callback(_ frame: Frame!, withArgs _: [Any]!) -> Any! {
     let buffer = frame.buffer
     let orientation = frame.orientation
     // code goes here
@@ -112,7 +107,27 @@ public class QRCodeFrameProcessorPlugin: NSObject, FrameProcessorPluginBase {
 }
 ```
 
-6. **Implement your frame processing.** See [Example Plugin (Swift)](https://github.com/mrousavy/react-native-vision-camera/blob/main/example/ios/Frame%20Processor%20Plugins/Example%20Plugin%20%28Swift%29) for reference.
+5. In your `AppDelegate.m`, add the following imports (you can skip this if your AppDelegate is in Swift):
+
+```objc
+#import "YOUR_XCODE_PROJECT_NAME-Swift.h"
+#import <VisionCamera/FrameProcessorPlugin.h>
+```
+
+6. In your `AppDelegate.m`, add the following code to `application:didFinishLaunchingWithOptions:`:
+
+```objc {5}
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
+{
+  ...
+
+  [FrameProcessorPlugin registerPlugin:[[QRCodeFrameProcessorPlugin alloc] init]];
+
+  return [super application:application didFinishLaunchingWithOptions:launchOptions];
+}
+```
+
+7. **Implement your frame processing.** See [Example Plugin (Swift)](https://github.com/mrousavy/react-native-vision-camera/blob/main/example/ios/Frame%20Processor%20Plugins/Example%20Plugin%20%28Swift%29) for reference.
 
 
 </TabItem>

example/ios/Frame Processor Plugins/Example Plugin (Objective-C)/ExampleFrameProcessorPlugin.m

@@ -11,12 +11,16 @@
 
 // Example for an Objective-C Frame Processor plugin
 
-@interface ExampleFrameProcessorPlugin : NSObject
+@interface ExampleFrameProcessorPlugin : FrameProcessorPlugin
 @end
 
 @implementation ExampleFrameProcessorPlugin
 
-static inline id example_plugin(Frame* frame, NSArray* arguments) {
+- (NSString *)name {
+  return @"example_plugin";
+}
+
+- (id)callback:(Frame *)frame withArguments:(NSArray<id> *)arguments {
   CVPixelBufferRef imageBuffer = CMSampleBufferGetImageBuffer(frame.buffer);
   NSLog(@"ExamplePlugin: %zu x %zu Image. Logging %lu parameters:", CVPixelBufferGetWidth(imageBuffer), CVPixelBufferGetHeight(imageBuffer), (unsigned long)arguments.count);
   
@@ -36,6 +40,8 @@ static inline id example_plugin(Frame* frame, NSArray* arguments) {
   };
 }
 
-VISION_EXPORT_FRAME_PROCESSOR(example_plugin)
++ (void) load {
+  [self registerPlugin:[[ExampleFrameProcessorPlugin alloc] init]];
+}
 
 @end

example/ios/Frame Processor Plugins/Example Plugin (Swift)/ExamplePluginSwift.m

@@ -1,13 +0,0 @@
-//
-//  ExamplePluginSwift.m
-//  VisionCamera
-//
-//  Created by Marc Rousavy on 01.05.21.
-//  Copyright © 2021 mrousavy. All rights reserved.
-//
-
-#import <Foundation/Foundation.h>
-#import <VisionCamera/FrameProcessorPlugin.h>
-
-@interface VISION_EXPORT_SWIFT_FRAME_PROCESSOR(example_plugin_swift, ExamplePluginSwift)
-@end

example/ios/Frame Processor Plugins/Example Plugin (Swift)/ExamplePluginSwift.swift

@@ -9,34 +9,38 @@
 import AVKit
 import Vision
 
-@objc(ExamplePluginSwift)
+@objc
-public class ExamplePluginSwift: NSObject, FrameProcessorPluginBase {
+public class ExamplePluginSwift : FrameProcessorPlugin {
-    @objc
-    public static func callback(_ frame: Frame!, withArgs args: [Any]!) -> Any! {
-        guard let imageBuffer = CMSampleBufferGetImageBuffer(frame.buffer) else {
-            return nil
-        }
-        NSLog("ExamplePlugin: \(CVPixelBufferGetWidth(imageBuffer)) x \(CVPixelBufferGetHeight(imageBuffer)) Image. Logging \(args.count) parameters:")
   
-        args.forEach { arg in
+  override public func name() -> String! {
-            var string = "\(arg)"
+    return "example_plugin_swift"
-            if let array = arg as? NSArray {
+  }
-                string = (array as Array).description
-            } else if let map = arg as? NSDictionary {
-                string = (map as Dictionary).description
-            }
-            NSLog("ExamplePlugin:   -> \(string) (\(type(of: arg)))")
-        }
   
-        return [
+  public override func callback(_ frame: Frame!, withArguments arguments: [Any]!) -> Any! {
-            "example_str": "Test",
+      guard let imageBuffer = CMSampleBufferGetImageBuffer(frame.buffer) else {
-            "example_bool": true,
+          return nil
-            "example_double": 5.3,
+      }
-            "example_array": [
+      NSLog("ExamplePlugin: \(CVPixelBufferGetWidth(imageBuffer)) x \(CVPixelBufferGetHeight(imageBuffer)) Image. Logging \(arguments.count) parameters:")
-                "Hello",
+
-                true,
+      arguments.forEach { arg in
-                17.38,
+          var string = "\(arg)"
-            ],
+          if let array = arg as? NSArray {
-        ]
+              string = (array as Array).description
-    }
+          } else if let map = arg as? NSDictionary {
+              string = (map as Dictionary).description
+          }
+          NSLog("ExamplePlugin:   -> \(string) (\(type(of: arg)))")
+      }
+
+      return [
+          "example_str": "Test",
+          "example_bool": true,
+          "example_double": 5.3,
+          "example_array": [
+              "Hello",
+              true,
+              17.38,
+          ],
+      ]
+  }
 }

example/ios/Podfile.lock

@@ -436,7 +436,7 @@ PODS:
     - React-Core
   - RNVectorIcons (9.2.0):
     - React-Core
-  - VisionCamera (3.0.0-rc.1):
+  - VisionCamera (3.0.0-rc.2):
     - React
     - React-callinvoker
     - React-Core
@@ -644,7 +644,7 @@ SPEC CHECKSUMS:
   RNScreens: 218801c16a2782546d30bd2026bb625c0302d70f
   RNStaticSafeAreaInsets: 055ddbf5e476321720457cdaeec0ff2ba40ec1b8
   RNVectorIcons: fcc2f6cb32f5735b586e66d14103a74ce6ad61f8
-  VisionCamera: 0d154cd0ab9043a3c8a4908fb57ad65c9e1f3baf
+  VisionCamera: e4f19a6c22cfa146736bdfe8df057e2ed5ca8dd3
   Yoga: 5ed1699acbba8863755998a4245daa200ff3817b
 
 PODFILE CHECKSUM: d53724fe402c2547f1dd1cc571bbe77d9820e636

example/ios/VisionCameraExample.xcodeproj/project.pbxproj

@@ -11,10 +11,9 @@
 		13B07FBF1A68108700A75B9A /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 13B07FB51A68108700A75B9A /* Images.xcassets */; };
 		13B07FC11A68108700A75B9A /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 13B07FB71A68108700A75B9A /* main.m */; };
 		81AB9BB82411601600AC10FF /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 81AB9BB72411601600AC10FF /* LaunchScreen.storyboard */; };
-		B8DB3BD5263DE8B7004C18D7 /* BuildFile in Sources */ = {isa = PBXBuildFile; };
+		B8DB3BD5263DE8B7004C18D7 /* (null) in Sources */ = {isa = PBXBuildFile; };
 		B8DB3BDC263DEA31004C18D7 /* ExampleFrameProcessorPlugin.m in Sources */ = {isa = PBXBuildFile; fileRef = B8DB3BD8263DEA31004C18D7 /* ExampleFrameProcessorPlugin.m */; };
 		B8DB3BDD263DEA31004C18D7 /* ExamplePluginSwift.swift in Sources */ = {isa = PBXBuildFile; fileRef = B8DB3BDA263DEA31004C18D7 /* ExamplePluginSwift.swift */; };
-		B8DB3BDE263DEA31004C18D7 /* ExamplePluginSwift.m in Sources */ = {isa = PBXBuildFile; fileRef = B8DB3BDB263DEA31004C18D7 /* ExamplePluginSwift.m */; };
 		B8F0E10825E0199F00586F16 /* File.swift in Sources */ = {isa = PBXBuildFile; fileRef = B8F0E10725E0199F00586F16 /* File.swift */; };
 		C0B129659921D2EA967280B2 /* libPods-VisionCameraExample.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 3CDCFE89C25C89320B98945E /* libPods-VisionCameraExample.a */; };
 /* End PBXBuildFile section */
@@ -31,7 +30,6 @@
 		81AB9BB72411601600AC10FF /* LaunchScreen.storyboard */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.storyboard; name = LaunchScreen.storyboard; path = VisionCameraExample/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		B8DB3BD8263DEA31004C18D7 /* ExampleFrameProcessorPlugin.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ExampleFrameProcessorPlugin.m; sourceTree = "<group>"; };
 		B8DB3BDA263DEA31004C18D7 /* ExamplePluginSwift.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ExamplePluginSwift.swift; sourceTree = "<group>"; };
-		B8DB3BDB263DEA31004C18D7 /* ExamplePluginSwift.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ExamplePluginSwift.m; sourceTree = "<group>"; };
 		B8F0E10625E0199F00586F16 /* VisionCameraExample-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "VisionCameraExample-Bridging-Header.h"; sourceTree = "<group>"; };
 		B8F0E10725E0199F00586F16 /* File.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = File.swift; sourceTree = "<group>"; };
 		C1D342AD8210E7627A632602 /* Pods-VisionCameraExample.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-VisionCameraExample.debug.xcconfig"; path = "Target Support Files/Pods-VisionCameraExample/Pods-VisionCameraExample.debug.xcconfig"; sourceTree = "<group>"; };
@@ -138,7 +136,6 @@
 			isa = PBXGroup;
 			children = (
 				B8DB3BDA263DEA31004C18D7 /* ExamplePluginSwift.swift */,
-				B8DB3BDB263DEA31004C18D7 /* ExamplePluginSwift.m */,
 			);
 			path = "Example Plugin (Swift)";
 			sourceTree = "<group>";
@@ -383,11 +380,10 @@
 			files = (
 				13B07FBC1A68108700A75B9A /* AppDelegate.mm in Sources */,
 				B8DB3BDC263DEA31004C18D7 /* ExampleFrameProcessorPlugin.m in Sources */,
-				B8DB3BD5263DE8B7004C18D7 /* BuildFile in Sources */,
+				B8DB3BD5263DE8B7004C18D7 /* (null) in Sources */,
 				B8DB3BDD263DEA31004C18D7 /* ExamplePluginSwift.swift in Sources */,
 				B8F0E10825E0199F00586F16 /* File.swift in Sources */,
 				13B07FC11A68108700A75B9A /* main.m in Sources */,
-				B8DB3BDE263DEA31004C18D7 /* ExamplePluginSwift.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

example/ios/VisionCameraExample/AppDelegate.mm

@@ -1,6 +1,8 @@
 #import "AppDelegate.h"
 
 #import <React/RCTBundleURLProvider.h>
+#import "VisionCameraExample-Swift.h"
+#import <VisionCamera/FrameProcessorPlugin.h>
 
 @implementation AppDelegate
 
@@ -11,6 +13,8 @@
   // They will be passed down to the ViewController used by React Native.
   self.initialProps = @{};
   
+  [FrameProcessorPlugin registerPlugin:[[ExamplePluginSwift alloc] init]];
+
   return [super application:application didFinishLaunchingWithOptions:launchOptions];
 }
 

ios/Frame Processor/FrameProcessorPlugin.h

@@ -6,57 +6,27 @@
 //  Copyright © 2021 mrousavy. All rights reserved.
 //
 
-#ifndef FrameProcessorPlugin_h
+#pragma once
-#define FrameProcessorPlugin_h
 
 #import <Foundation/Foundation.h>
-#import "FrameProcessorPluginRegistry.h"
 #import "Frame.h"
 
-@protocol FrameProcessorPluginBase
+/// The base class for a Frame Processor Plugin which can be called synchronously from a JS Frame Processor.
-+ (id) callback:(Frame*)frame withArgs:(NSArray<id>*)args;
+///
+/// Subclass this class in a Swift or Objective-C class and override the `callback:withArguments:` method, and
+/// implement your Frame Processing there.
+/// Then, in your App's startup (AppDelegate.m), call `FrameProcessorPluginBase.registerPlugin(YourNewPlugin())`
+@interface FrameProcessorPlugin : NSObject
+
+/// Get the name of the Frame Processor Plugin.
+/// This will be exposed to JS under the `FrameProcessorPlugins` Proxy object.
+- (NSString *)name;
+
+/// The actual callback when calling this plugin. Any Frame Processing should be handled there.
+/// Make sure your code is optimized, as this is a hot path.
+- (id) callback:(Frame*)frame withArguments:(NSArray<id>*)arguments;
+
+/// Register the given plugin in the Plugin Registry. This should be called on App Startup.
++ (void) registerPlugin:(FrameProcessorPlugin*)plugin;
+
 @end
-
-
-#define VISION_CONCAT2(A, B) A##B
-#define VISION_CONCAT(A, B) VISION_CONCAT2(A, B)
-
-/**
- * Use this Macro to register the given function as a Frame Processor.
- * * Make sure the given function is a C-style function with the following signature: static inline id callback(Frame* frame, NSArray* args)
- * * Make sure the given function's name is unique across other frame processor plugins
- * * Make sure your frame processor returns a Value that can be converted to JS
- * * Make sure to use this Macro in an @implementation, not @interface
- *
- * The JS function will have the same name as the given Objective-C function. It can be accessed through the FrameProcessorPlugins object exposed by VisionCamera.
- */
-#define VISION_EXPORT_FRAME_PROCESSOR(frame_processor)                              \
-                                                                                    \
-+(void)load                                                                         \
-{                                                                                   \
-  [FrameProcessorPluginRegistry addFrameProcessorPlugin:@ #frame_processor callback:^id(Frame* frame, NSArray<id>* args) { \
-    return frame_processor(frame, args);                                           \
-  }];                                                                               \
-}
-
-
-/**
- * Same as VISION_EXPORT_FRAME_PROCESSOR, but uses __attribute__((constructor)) for
- * registration. Useful for registering swift classes that forbids use of +(void)load.
- */
-#define VISION_EXPORT_SWIFT_FRAME_PROCESSOR(name, objc_name) \
-objc_name : NSObject<FrameProcessorPluginBase>                                      \
-@end                                                                                \
-                                                                                    \
-@interface objc_name (FrameProcessorPlugin)                                         \
-@end                                                                                \
-@implementation objc_name (FrameProcessorPlugin)                                    \
-                                                                                    \
-+(void)load                                                                          \
-{                                                                                   \
-  [FrameProcessorPluginRegistry addFrameProcessorPlugin:@ #name callback:^id(Frame* frame, NSArray<id>* args) {    \
-    return [objc_name callback:frame withArgs:args];                               \
-  }];                                                                               \
-}
-
-#endif /* FrameProcessorPlugin_h */

ios/Frame Processor/FrameProcessorPlugin.m

@@ -0,0 +1,31 @@
+//
+//  FrameProcessorPlugin.m
+//  VisionCamera
+//
+//  Created by Marc Rousavy on 24.02.23.
+//  Copyright © 2023 mrousavy. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "FrameProcessorPlugin.h"
+#import "FrameProcessorPluginRegistry.h"
+
+@implementation FrameProcessorPlugin
+
+- (NSString *)name {
+  [NSException raise:NSInternalInconsistencyException
+              format:@"Frame Processor Plugin \"%@\" does not override the `name` getter!", [self name]];
+  return nil;
+}
+
+- (id)callback:(Frame *)frame withArguments:(NSArray<id> *)arguments {
+  [NSException raise:NSInternalInconsistencyException
+              format:@"Frame Processor Plugin \"%@\" does not override the `callback(frame:withArguments:)` method!", [self name]];
+  return nil;
+}
+
++ (void)registerPlugin:(FrameProcessorPlugin *)plugin {
+  [FrameProcessorPluginRegistry addFrameProcessorPlugin:plugin];
+}
+
+@end

ios/Frame Processor/FrameProcessorPluginRegistry.h

@@ -10,12 +10,11 @@
 
 #import <Foundation/Foundation.h>
 #import "Frame.h"
-
+#import "FrameProcessorPlugin.h"
-typedef id (^FrameProcessorPlugin) (Frame* frame, NSArray<id>* arguments);
 
 @interface FrameProcessorPluginRegistry : NSObject
 
-+ (NSMutableDictionary<NSString*, FrameProcessorPlugin>*)frameProcessorPlugins;
++ (NSMutableDictionary<NSString*, FrameProcessorPlugin*>*)frameProcessorPlugins;
-+ (void) addFrameProcessorPlugin:(NSString*)name callback:(FrameProcessorPlugin)callback;
++ (void) addFrameProcessorPlugin:(FrameProcessorPlugin*)plugin;
 
 @end

ios/Frame Processor/FrameProcessorPluginRegistry.mm

@@ -11,19 +11,19 @@
 
 @implementation FrameProcessorPluginRegistry
 
-+ (NSMutableDictionary<NSString*, FrameProcessorPlugin>*)frameProcessorPlugins {
++ (NSMutableDictionary<NSString*, FrameProcessorPlugin*>*)frameProcessorPlugins {
-  static NSMutableDictionary<NSString*, FrameProcessorPlugin>* plugins = nil;
+  static NSMutableDictionary<NSString*, FrameProcessorPlugin*>* plugins = nil;
   if (plugins == nil) {
     plugins = [[NSMutableDictionary alloc] init];
   }
   return plugins;
 }
 
-+ (void) addFrameProcessorPlugin:(NSString*)name callback:(FrameProcessorPlugin)callback {
++ (void) addFrameProcessorPlugin:(FrameProcessorPlugin*)plugin {
-  BOOL alreadyExists = [[FrameProcessorPluginRegistry frameProcessorPlugins] valueForKey:name] != nil;
+  BOOL alreadyExists = [[FrameProcessorPluginRegistry frameProcessorPlugins] valueForKey:plugin.name] != nil;
-  NSAssert(!alreadyExists, @"Tried to two Frame Processor Plugins with the same name! Either choose unique names, or remove the unused plugin.");
+  NSAssert(!alreadyExists, @"Tried to add a Frame Processor Plugin with a name that already exists! Either choose unique names, or remove the unused plugin. Name: %@", plugin.name);
 
-  [[FrameProcessorPluginRegistry frameProcessorPlugins] setValue:callback forKey:name];
+  [[FrameProcessorPluginRegistry frameProcessorPlugins] setValue:plugin forKey:plugin.name];
 }
 
 @end

ios/Frame Processor/FrameProcessorRuntimeManager.mm

@@ -9,6 +9,7 @@
 #import <Foundation/Foundation.h>
 #import "FrameProcessorRuntimeManager.h"
 #import "FrameProcessorPluginRegistry.h"
+#import "FrameProcessorPlugin.h"
 #import "FrameHostObject.h"
 
 #import <memory>
@@ -83,14 +84,14 @@ __attribute__((objc_runtime_name("_TtC12VisionCamera10CameraView")))
     auto pluginName = [pluginKey UTF8String];
 
     NSLog(@"FrameProcessorBindings: Installing Frame Processor plugin \"%s\"...", pluginName);
-    // Get the Plugin callback func
+    // Get the Plugin
-    FrameProcessorPlugin callback = [[FrameProcessorPluginRegistry frameProcessorPlugins] valueForKey:pluginKey];
+    FrameProcessorPlugin* plugin = [[FrameProcessorPluginRegistry frameProcessorPlugins] valueForKey:pluginKey];
 
     // Create the JSI host function
-    auto function = [callback, callInvoker](jsi::Runtime& runtime,
+    auto function = [plugin, callInvoker](jsi::Runtime& runtime,
-                                            const jsi::Value& thisValue,
+                                          const jsi::Value& thisValue,
-                                            const jsi::Value* arguments,
+                                          const jsi::Value* arguments,
-                                            size_t count) -> jsi::Value {
+                                          size_t count) -> jsi::Value {
       // Get the first parameter, which is always the native Frame Host Object.
       auto frameHostObject = arguments[0].asObject(runtime).asHostObject(runtime);
       auto frame = static_cast<FrameHostObject*>(frameHostObject.get());
@@ -101,7 +102,7 @@ __attribute__((objc_runtime_name("_TtC12VisionCamera10CameraView")))
                                                  count - 1, // use smaller count
                                                  callInvoker);
       // Call the FP Plugin, which might return something.
-      id result = callback(frame->frame, args);
+      id result = [plugin callback:frame->frame withArguments:args];
 
       // Convert the return value (or null) to a JS Value and return it to JS
       return convertObjCObjectToJSIValue(runtime, result);

ios/VisionCamera.xcodeproj/project.pbxproj

@@ -110,6 +110,7 @@
 		B86DC970260E2D5200FB17B2 /* AVAudioSession+trySetAllowHaptics.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "AVAudioSession+trySetAllowHaptics.swift"; sourceTree = "<group>"; };
 		B86DC973260E310600FB17B2 /* CameraView+AVAudioSession.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "CameraView+AVAudioSession.swift"; sourceTree = "<group>"; };
 		B86DC976260E315100FB17B2 /* CameraView+AVCaptureSession.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "CameraView+AVCaptureSession.swift"; sourceTree = "<group>"; };
+		B86F803429A90DBD00205E48 /* FrameProcessorPlugin.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = FrameProcessorPlugin.m; sourceTree = "<group>"; };
 		B8805065266798AB00EAD7F2 /* JSConsoleHelper.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = JSConsoleHelper.h; sourceTree = "<group>"; };
 		B8805066266798B600EAD7F2 /* JSConsoleHelper.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = JSConsoleHelper.mm; sourceTree = "<group>"; };
 		B882720F26AEB1A100B14107 /* AVCaptureConnection+setInterfaceOrientation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "AVCaptureConnection+setInterfaceOrientation.swift"; sourceTree = "<group>"; };
@@ -285,6 +286,7 @@
 				B80C0DFE260BDD97001699AB /* FrameProcessorPluginRegistry.h */,
 				B80C0DFF260BDDF7001699AB /* FrameProcessorPluginRegistry.mm */,
 				B88873E5263D46C7008B1D0E /* FrameProcessorPlugin.h */,
+				B86F803429A90DBD00205E48 /* FrameProcessorPlugin.m */,
 			);
 			path = "Frame Processor";
 			sourceTree = "<group>";