chore: use ffi_gen for binding generation

example/text_classification/pubspec.yaml

@@ -5,8 +5,7 @@ publish_to: 'none'
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
-  flutter: ">=1.26.0-17.6.pre"
+  sdk: '>=3.0.0 <4.0.0'
 
 dependencies:
   flutter:
@@ -25,15 +24,13 @@ dev_dependencies:
   flutter_driver:
     sdk: flutter
   integration_test:
-    sdk: flutter    
-
+    sdk: flutter
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
 
 # The following section is specific to Flutter.
 flutter:
-
   # The following line ensures that the Material Icons font is
   # included with your application, so that you can use the icons in
   # the material Icons class.

ffigen_tensorflow_lite.yaml

@@ -0,0 +1,31 @@
+# Run with `flutter pub run ffigen --config ffigen.yaml`.
+name: TensorFlowLiteBindings
+description: |
+  Bindings for `src/tensorflow_lite/c_api.h`.
+
+  Regenerate bindings with `flutter pub run ffigen --config ffigen_tensorflow_lite.yaml`.
+output: 'lib/src/bindings/tensorflow_lite_bindings_generated.dart'
+headers:
+  entry-points:
+    - 'src/tensorflow_lite/c_api.h'
+    - 'src/tensorflow_lite/c_api_experimental.h'
+    - 'src/tensorflow_lite/coreml_delegate.h'
+    - 'src/tensorflow_lite/metal_delegate.h'
+    - 'src/tensorflow_lite/xnnpack_delegate.h'
+    - 'src/tensorflow_lite/delegate.h'
+    - 'src/tensorflow_lite/delegate_options.h'
+  include-directives:
+    - 'src/tensorflow_lite/c_api.h'
+    - 'src/tensorflow_lite/c_api_experimental.h'
+    - 'src/tensorflow_lite/coreml_delegate.h'
+    - 'src/tensorflow_lite/metal_delegate.h'
+    - 'src/tensorflow_lite/xnnpack_delegate.h'
+    - 'src/tensorflow_lite/delegate.h'
+    - 'src/tensorflow_lite/delegate_options.h'
+preamble: |
+  // ignore_for_file: always_specify_types
+  // ignore_for_file: camel_case_types
+  // ignore_for_file: non_constant_identifier_names
+comments:
+  style: any
+  length: full

lib/src/bindings/bindings.dart

@@ -13,15 +13,34 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 import 'dart:ffi';
+import 'dart:io';
+
+import 'package:tflite_flutter/src/bindings/tensorflow_lite_bindings_generated.dart';
+
+final DynamicLibrary _dylib = () {
+  if (Platform.isAndroid) {
+    return DynamicLibrary.open('libtensorflowlite_jni.so');
+  }
+
+  if (Platform.isIOS) {
+    return DynamicLibrary.process();
+  }
+
+  throw UnsupportedError('Unknown platform: ${Platform.operatingSystem}');
+}();
 
-import 'package:ffi/ffi.dart';
+final DynamicLibrary _dylibGpu = () {
+  if (Platform.isAndroid) {
+    return DynamicLibrary.open('libtensorflowlite_gpu_jni.so');
+  }
 
-import 'dlib.dart';
+  throw UnsupportedError('Unknown platform: ${Platform.operatingSystem}');
+}();
 
-/// Version information for the TensorFlowLite library.
-final Pointer<Utf8> Function() tfLiteVersion = tflitelib
-    .lookup<NativeFunction<_TfLiteVersionNativeT>>('TfLiteVersion')
-    .asFunction();
+/// TensorFlowLite Bindings
+final tfliteBinding = TensorFlowLiteBindings(_dylib);
 
-typedef _TfLiteVersionNativeT = Pointer<Utf8> Function();
+/// TensorFlowLite Gpu Bindings
+final tfliteBindingGpu = TensorFlowLiteBindings(_dylibGpu);