async object detect

.github/workflows/formatter.yaml

@@ -0,0 +1,24 @@
+on:
+  push:
+  pull_request:
+
+name: Format Code
+
+jobs:
+  build:
+    name: format code
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Set up Flutter
+        uses: subosito/flutter-action@v1
+      - name: Format code
+        run: |
+          dart format --line-length 110 \
+            $(find lib test -name '*.dart' -not -name '*.g.dart' -and -not -name '*.freezed.dart')
+      - name: Commit changes
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: "dart format ✅"
+          branch: ${{ github.head_ref }}

example/test/widget_test.dart

@@ -0,0 +1 @@
+

ffigen.yaml

@@ -25,6 +25,7 @@ headers:
     - src/core/version.h
     - src/dnn/asyncarray.h
     - src/dnn/dnn.h
+    - src/dnn/dnn_async.h
     - src/extra/aruco.h
     - src/extra/img_hash.h
     - src/extra/wechat_qrcode.h
@@ -36,6 +37,7 @@ headers:
     - src/imgproc/imgproc.h
     - src/imgproc/imgproc_async.h
     - src/objdetect/objdetect.h
+    - src/objdetect/objdetect_async.h
     - src/photo/photo.h
     - src/stitching/stitching.h
     - src/video/video.h
@@ -51,6 +53,7 @@ headers:
     - src/core/version.h
     - src/dnn/asyncarray.h
     - src/dnn/dnn.h
+    - src/dnn/dnn_async.h
     - src/extra/aruco.h
     - src/extra/img_hash.h
     - src/extra/wechat_qrcode.h
@@ -62,6 +65,7 @@ headers:
     - src/imgproc/imgproc.h
     - src/imgproc/imgproc_async.h
     - src/objdetect/objdetect.h
+    - src/objdetect/objdetect_async.h
     - src/photo/photo.h
     - src/stitching/stitching.h
     - src/video/video.h

lib/opencv_dart.dart

@@ -28,6 +28,7 @@ export 'src/core/scalar.dart';
 export 'src/core/size.dart';
 export 'src/core/vec.dart';
 export 'src/dnn/dnn.dart';
+export 'src/dnn/dnn_async.dart';
 export 'src/features2d/features2d.dart';
 export 'src/highgui/highgui.dart';
 export 'src/imgcodecs/imgcodecs.dart';
@@ -36,6 +37,7 @@ export 'src/imgproc/clahe.dart';
 export 'src/imgproc/imgproc.dart';
 export 'src/imgproc/subdiv2d.dart';
 export 'src/objdetect/objdetect.dart';
+export 'src/objdetect/objdetect_async.dart';
 export 'src/photo/photo.dart';
 export 'src/stitching/stitching.dart';
 export 'src/svd/svd.dart';

lib/src/contrib/aruco_dict.dart

@@ -95,8 +95,7 @@ class ArucoDictionary extends CvStruct<cvg.ArucoDictionary> {
 
   @override
   cvg.ArucoDictionary get ref => ptr.ref;
-  static final finalizer =
-      OcvFinalizer<cvg.ArucoDictionaryPtr>(CFFI.addresses.ArucoDictionary_Close);
+  static final finalizer = OcvFinalizer<cvg.ArucoDictionaryPtr>(CFFI.addresses.ArucoDictionary_Close);
 
   void dispose() {
     finalizer.detach(this);

lib/src/core/base.dart

@@ -151,6 +151,28 @@ Future<T> cvRunAsync3<T>(
   return completer.future;
 }
 
+Future<T> cvRunAsync4<T>(
+  ffi.Pointer<cvg.CvStatus> Function(cvg.CvCallback_4 callback) func,
+  void Function(
+    Completer<T> completer,
+    VoidPtr p,
+    VoidPtr p1,
+    VoidPtr p2,
+    VoidPtr p3,
+  ) onComplete,
+) {
+  final completer = Completer<T>();
+  late final NativeCallable<cvg.CvCallback_4Function> ccallback;
+  void onResponse(VoidPtr p, VoidPtr p1, VoidPtr p2, VoidPtr p3) {
+    onComplete(completer, p, p1, p2, p3);
+    ccallback.close();
+  }
+
+  ccallback = ffi.NativeCallable.listener(onResponse);
+  throwIfFailed(func(ccallback.nativeFunction));
+  return completer.future;
+}
+
 Future<T> cvRunAsync5<T>(
   ffi.Pointer<cvg.CvStatus> Function(cvg.CvCallback_5 callback) func,
   void Function(Completer<T> completer, VoidPtr p, VoidPtr p1, VoidPtr p2, VoidPtr p3, VoidPtr p4) onComplete,

lib/src/dnn/dnn.dart

@@ -95,6 +95,11 @@ class Net extends CvStruct<cvg.Net> {
       finalizer.attach(this, ptr.cast(), detach: this);
     }
   }
+  factory Net.fromPointer(
+    cvg.NetPtr ptr, [
+    bool attach = true,
+  ]) =>
+      Net._(ptr, attach);
 
   factory Net.empty() {
     final p = calloc<cvg.Net>();