feat: Expose unified VisionCameraProxy object, make FrameProcessorPlugins object-oriented (#1660)

* feat: Replace `FrameProcessorRuntimeManager` with `VisionCameraProxy` (iOS)

* Make `FrameProcessorPlugin` a constructable HostObject

* fix: Fix `name` override

* Simplify `useFrameProcessor

* fix: Fix lint errors

* Remove FrameProcessorPlugin::name

* JSIUtils -> JSINSObjectConversion

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

@@ -1,48 +0,0 @@
-//
-//  ExamplePluginSwift.swift
-//  VisionCamera
-//
-//  Created by Marc Rousavy on 30.04.21.
-//  Copyright © 2021 mrousavy. All rights reserved.
-//
-
-import AVKit
-import Vision
-
-#if VISION_CAMERA_ENABLE_FRAME_PROCESSORS
-@objc
-public class ExamplePluginSwift : FrameProcessorPlugin {
-  
-  override public func name() -> String! {
-    return "example_plugin_swift"
-  }
-  
-  public override func callback(_ frame: Frame!, withArguments arguments: [Any]!) -> Any! {
-      guard let imageBuffer = CMSampleBufferGetImageBuffer(frame.buffer) else {
-          return nil
-      }
-      NSLog("ExamplePlugin: \(CVPixelBufferGetWidth(imageBuffer)) x \(CVPixelBufferGetHeight(imageBuffer)) Image. Logging \(arguments.count) parameters:")
-
-      arguments.forEach { arg in
-          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,
-          ],
-      ]
-  }
-}
-#endif

example/ios/Frame Processor Plugins/Example Plugin/ExampleFrameProcessorPlugin.m

@@ -8,6 +8,7 @@
 #if __has_include(<VisionCamera/FrameProcessorPlugin.h>)
 #import <Foundation/Foundation.h>
 #import <VisionCamera/FrameProcessorPlugin.h>
+#import <VisionCamera/FrameProcessorPluginRegistry.h>
 #import <VisionCamera/Frame.h>
 
 // Example for an Objective-C Frame Processor plugin
@@ -17,18 +18,14 @@
 
 @implementation ExampleFrameProcessorPlugin
 
-- (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);
-  
+
   for (id param in arguments) {
     NSLog(@"ExamplePlugin:   -> %@ (%@)", param == nil ? @"(nil)" : [param description], NSStringFromClass([param classForCoder]));
   }
-  
+
   return @{
     @"example_str": @"Test",
     @"example_bool": @true,
@@ -42,7 +39,10 @@
 }
 
 + (void) load {
-  [self registerPlugin:[[ExampleFrameProcessorPlugin alloc] init]];
+  [FrameProcessorPluginRegistry addFrameProcessorPlugin:@"example_plugin"
+                                        withInitializer:^FrameProcessorPlugin*(NSDictionary* options) {
+    return [[ExampleFrameProcessorPlugin alloc] initWithOptions:options];
+  }];
 }
 
 @end