feat: Frame Processors: Allow returning Frames (support for resize and other frame manipulations) (#185)

* batch

* Init Frame as box

* Use ObjC syntax

* Fix access

* Revert "Fix access"

This reverts commit 7de09e52739d4c2b53f485d5ed696f1665fa5737.

* Revert "Use ObjC syntax"

This reverts commit e33f05ae8451cc4ee24af41d14dc76a57c157554.

* Revert "Init Frame as box"

This reverts commit 5adafb6109bfbf7fddb8ddc4af7d306b7b76b476.

* use holder

* convert buffer <-> jsi object

* add docs

* add more docs

* Update JSIUtils.mm

* Update FRAME_PROCESSORS_CREATE_OVERVIEW.mdx

* Update CameraView+RecordVideo.swift

ios/Frame Processor/CMSampleBufferRefHolder.h

@@ -0,0 +1,22 @@
+//
+//  CMSampleBufferRefHolder.h
+//  VisionCamera
+//
+//  Created by Marc Rousavy on 15.03.21.
+//  Copyright © 2021 mrousavy. All rights reserved.
+//
+
+#pragma once
+
+#import <Foundation/Foundation.h>
+#import <CoreMedia/CMSampleBuffer.h>
+
+@interface CMSampleBufferRefHolder : NSObject {
+  CMSampleBufferRef buffer;
+}
+
+- (instancetype) initWithBuffer:(CMSampleBufferRef)buffer;
+
+@property (nonatomic) CMSampleBufferRef buffer;
+
+@end

ios/Frame Processor/CMSampleBufferRefHolder.m

@@ -0,0 +1,25 @@
+//
+//  CMSampleBufferRefHolder.m
+//  VisionCamera
+//
+//  Created by Marc Rousavy on 08.06.21.
+//  Copyright © 2021 mrousavy. All rights reserved.
+//
+
+#import "CMSampleBufferRefHolder.h"
+#import <Foundation/Foundation.h>
+#import <CoreMedia/CMSampleBuffer.h>
+
+@implementation CMSampleBufferRefHolder
+
+- (instancetype) initWithBuffer:(CMSampleBufferRef)buffer {
+  self = [super init];
+  if (self) {
+    self.buffer = buffer;
+  }
+  return self;
+}
+
+@synthesize buffer;
+
+@end

ios/Frame Processor/Frame.h

@@ -1,20 +0,0 @@
-//
-//  Frame.h
-//  VisionCamera
-//
-//  Created by Marc Rousavy on 15.03.21.
-//  Copyright © 2021 mrousavy. All rights reserved.
-//
-
-#pragma once
-
-#import <CoreMedia/CMSampleBuffer.h>
-
-// TODO: Make this Objective-C so it can be imported in Swift?
-class Frame {
- public:
-  explicit Frame(CMSampleBufferRef buffer): buffer(buffer) {}
-
- public:
-  CMSampleBufferRef buffer;
-};

ios/Frame Processor/FrameHostObject.h

@@ -8,19 +8,21 @@
 
 #pragma once
 
-#import "Frame.h"
 #import <jsi/jsi.h>
 #import <CoreMedia/CMSampleBuffer.h>
 
 using namespace facebook;
 
-class JSI_EXPORT FrameHostObject: public Frame, public jsi::HostObject {
+class JSI_EXPORT FrameHostObject: public jsi::HostObject {
 public:
-  explicit FrameHostObject(CMSampleBufferRef buffer): Frame(buffer) {}
+  explicit FrameHostObject(CMSampleBufferRef buffer): buffer(buffer) {}
   ~FrameHostObject();
 
 public:
   jsi::Value get(jsi::Runtime&, const jsi::PropNameID& name) override;
   std::vector<jsi::PropNameID> getPropertyNames(jsi::Runtime& rt) override;
   void destroyBuffer();
+  
+public:
+  CMSampleBufferRef buffer;
 };