async object detect

ffigen.yaml

@@ -36,6 +36,7 @@ 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
@@ -62,6 +63,7 @@ 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/src/core/base.dart

@@ -44,9 +44,11 @@ ffi.DynamicLibrary loadNativeLibrary() {
     "windows" => "$_libraryName.dll",
     "linux" || "android" || "fuchsia" => "lib$_libraryName.so",
     "macos" => "lib$_libraryName.dylib",
-    _ => throw UnsupportedError("Platform ${Platform.operatingSystem} not supported")
+    _ => throw UnsupportedError(
+        "Platform ${Platform.operatingSystem} not supported")
   };
-  final libPath = Platform.environment["OPENCV_DART_LIB_PATH"] ?? defaultLibPath;
+  final libPath =
+      Platform.environment["OPENCV_DART_LIB_PATH"] ?? defaultLibPath;
   return ffi.DynamicLibrary.open(libPath);
 }
 
@@ -62,7 +64,8 @@ abstract class ICvStruct<T extends ffi.Struct> extends CvObject<T> {
   T get ref;
 }
 
-abstract class CvStruct<T extends ffi.Struct> extends ICvStruct<T> with EquatableMixin {
+abstract class CvStruct<T extends ffi.Struct> extends ICvStruct<T>
+    with EquatableMixin {
   CvStruct.fromPointer(super.ptr) : super.fromPointer();
 }
 
@@ -137,7 +140,8 @@ Future<T> cvRunAsync2<T>(
 
 Future<T> cvRunAsync3<T>(
   ffi.Pointer<cvg.CvStatus> Function(cvg.CvCallback_3 callback) func,
-  void Function(Completer<T> completer, VoidPtr p, VoidPtr p1, VoidPtr p2) onComplete,
+  void Function(Completer<T> completer, VoidPtr p, VoidPtr p1, VoidPtr p2)
+      onComplete,
 ) {
   final completer = Completer<T>();
   late final NativeCallable<cvg.CvCallback_3Function> ccallback;
@@ -151,9 +155,33 @@ 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,
+  void Function(Completer<T> completer, VoidPtr p, VoidPtr p1, VoidPtr p2,
+          VoidPtr p3, VoidPtr p4)
+      onComplete,
 ) {
   final completer = Completer<T>();
   late final NativeCallable<cvg.CvCallback_5Function> ccallback;
@@ -168,11 +196,17 @@ Future<T> cvRunAsync5<T>(
 }
 
 // Completers for async
-void matCompleter(Completer<Mat> completer, VoidPtr p) => completer.complete(Mat.fromPointer(p.cast()));
+void matCompleter(Completer<Mat> completer, VoidPtr p) =>
+    completer.complete(Mat.fromPointer(p.cast()));
 void matCompleter2(Completer<(Mat, Mat)> completer, VoidPtr p, VoidPtr p1) =>
     completer.complete((Mat.fromPointer(p.cast()), Mat.fromPointer(p1.cast())));
-void matCompleter3(Completer<(Mat, Mat, Mat)> completer, VoidPtr p, VoidPtr p1, VoidPtr p2) =>
-    completer.complete((Mat.fromPointer(p.cast()), Mat.fromPointer(p1.cast()), Mat.fromPointer(p2.cast())));
+void matCompleter3(Completer<(Mat, Mat, Mat)> completer, VoidPtr p, VoidPtr p1,
+        VoidPtr p2) =>
+    completer.complete((
+      Mat.fromPointer(p.cast()),
+      Mat.fromPointer(p1.cast()),
+      Mat.fromPointer(p2.cast())
+    ));
 
 // Arena wrapper
 R cvRunArena<R>(
@@ -200,7 +234,8 @@ R cvRunArena<R>(
 typedef NativeFinalizerFunctionT<T extends ffi.NativeType>
     = ffi.Pointer<ffi.NativeFunction<ffi.Void Function(T token)>>;
 
-ffi.NativeFinalizer OcvFinalizer<T extends ffi.NativeType>(NativeFinalizerFunctionT<T> func) =>
+ffi.NativeFinalizer OcvFinalizer<T extends ffi.NativeType>(
+        NativeFinalizerFunctionT<T> func) =>
     ffi.NativeFinalizer(func.cast<ffi.NativeFinalizerFunction>());
 
 // native types