began writing my own matching alg.

lib/libdart_openmvg_generated.dart

@@ -42,6 +42,28 @@ class LibDartOpenMVG {
   late final _make_buffer = _make_bufferPtr
       .asFunction<ffi.Pointer<FILE> Function(ffi.Pointer<ffi.Uint8>, int)>();
 
+  int read_buffer(
+    ffi.Pointer<FILE> arg0,
+    ffi.Pointer<ffi.Pointer<ffi.Uint8>> arg1,
+    ffi.Pointer<ffi.Size> arg2,
+  ) {
+    return _read_buffer(
+      arg0,
+      arg1,
+      arg2,
+    );
+  }
+
+  late final _read_bufferPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Int Function(
+              ffi.Pointer<FILE>,
+              ffi.Pointer<ffi.Pointer<ffi.Uint8>>,
+              ffi.Pointer<ffi.Size>)>>('read_buffer');
+  late final _read_buffer = _read_bufferPtr.asFunction<
+      int Function(ffi.Pointer<FILE>, ffi.Pointer<ffi.Pointer<ffi.Uint8>>,
+          ffi.Pointer<ffi.Size>)>();
+
   ffi.Pointer<Frame> new_frame_from_handle(
     ffi.Pointer<FILE> arg0,
     int arg1,