add asyncarray

Author: rainyl

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.4.1
+
+* add `asyncarray`
+
 ## 0.4.0
 
 * :rocket: add support for `photo` module

README.md

@@ -33,7 +33,7 @@ prebuilt binaries.
 | svd        | :white_check_mark: | :white_check_mark: | SVD module              |
 | video      | :white_check_mark: | :white_check_mark: | Video module            |
 | videoio    | :white_check_mark: | :white_check_mark: | VideoIO module          |
-| asyncarray | :x:                | :x:                | AsyncArray module       |
+| asyncarray | :white_check_mark: | :white_check_mark: | AsyncArray module       |
 | calib3d    | :x:                | :x:                | Calib3D module          |
 | dnn        | :x:                | :x:                | DNN module              |
 | photo      | :white_check_mark: | :white_check_mark: | Photo module            |

lib/src/core/asyncarray.dart

@@ -0,0 +1,38 @@
+library cv;
+
+import 'dart:ffi' as ffi;
+
+import 'package:ffi/ffi.dart';
+import 'package:opencv_dart/src/core/cv_exception.dart';
+
+import '../core/mat_type.dart';
+import '../core/point.dart';
+import '../core/base.dart';
+import '../core/mat.dart';
+import '../opencv.g.dart' as cvg;
+
+final _bindings = cvg.CvNative(loadNativeLibrary());
+
+class AsyncArray implements ffi.Finalizable {
+  AsyncArray._(this.ptr) {
+    finalizer.attach(this, ptr);
+  }
+
+  factory AsyncArray.empty() {
+    final _ptr = _bindings.AsyncArray_New();
+    return AsyncArray._(_ptr);
+  }
+
+  cvg.AsyncArray ptr;
+  static final finalizer = ffi.NativeFinalizer(_bindings.addresses.AsyncArray_Close);
+
+  Mat get() {
+    return using<Mat>((arena) {
+      final dst = Mat.empty();
+      final result = _bindings.AsyncArray_GetAsync(ptr, dst.ptr);
+      final dartStr = result.cast<Utf8>().toDartString();
+      if (dartStr.length > 0) throw OpenCvDartException("$dartStr");
+      return dst;
+    });
+  }
+}

lib/src/opencv.dart

@@ -5,6 +5,7 @@ export 'constants.g.dart';
 export 'aruco/aruco.dart';
 export 'aruco/aruco_dict.dart';
 
+export 'core/asyncarray.dart';
 export 'core/base.dart';
 export 'core/core.dart';
 export 'core/contours.dart';

pubspec.yaml

@@ -1,6 +1,6 @@
 name: opencv_dart
 description: "OpenCV4 bindings for Dart language and Flutter, using dart:ffi. The most complete OpenCV bindings for Dart!"
-version: 0.4.0
+version: 0.4.1
 homepage: https://github.com/rainyl/opencv_dart
 
 environment:

test/core_test.dart

@@ -8,6 +8,11 @@ void main() async {
     expect(version.length, greaterThan(0));
   });
 
+  test('cv.AsyncArray', () {
+    final arr = cv.AsyncArray.empty();
+    expect(arr.ptr, isNotNull);
+  });
+
   test('cv.absDiff', () {
     final mat0 = cv.Mat.ones(100, 100, cv.MatType.CV_8UC3);
     final mat1 = cv.Mat.zeros(100, 100, cv.MatType.CV_8UC3);