Add Flutter example for speaker identification (#894)

+name: flutter
+
+on:
+  push:
+    branches:
+      - flutter
+      - flutter-sid-2
+    tags:
+      - '*'
+    paths:
+      - '.github/workflows/flutter.yaml'
+      - 'CMakeLists.txt'
+      - 'cmake/**'
+      - 'sherpa-onnx/csrc/*'
+      - 'sherpa-onnx/c-api/*'
+      - 'sherpa-onnx/flutter/**'
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/flutter.yaml'
+      - 'CMakeLists.txt'
+      - 'cmake/**'
+      - 'sherpa-onnx/csrc/*'
+      - 'sherpa-onnx/c-api/*'
+      - 'sherpa-onnx/flutter/**'
+
+  workflow_dispatch:
+
+concurrency:
+  group: flutter-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  flutter:
+    name: flutter
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Flutter SDK
+        uses: flutter-actions/setup-flutter@v3
+        with:
+          channel: stable
+          version: latest
+
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2
+        with:
+          key: ${{ matrix.os }}-flutter
+
+      - name: Display PWD
+        shell: bash
+        run: |
+          echo "pwd: $PWD"
+          ls -lh
+
+      - name: Display machine info
+        shell: bash
+        run: |
+          uname -a
+
+      - name: Display flutter info
+        shell: bash
+        run: |
+          which flutter
+          which dart
+
+          flutter --version
+          dart --version
+          flutter doctor
+
+      - name: Configure CMake
+        shell: bash
+        run: |
+          export CMAKE_CXX_COMPILER_LAUNCHER=ccache
+          export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
+          cmake --version
+
+          mkdir build
+          cd build
+
+          cmake \
+            -D BUILD_SHARED_LIBS=ON \
+            -DCMAKE_OSX_ARCHITECTURES='arm64;x86_64' \
+            -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+            -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+            -DSHERPA_ONNX_ENABLE_BINARY=ON \
+            -DCMAKE_INSTALL_PREFIX=./install \
+            ..
+
+      - name: Build sherpa-onnx for macos
+        shell: bash
+        run: |
+          export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
+
+          cd build
+          make -j2
+          make install
+
+          rm -v ./install/lib/libcargs*
+
+      - name: Copy libs
+        shell: bash
+        run: |
+          cp -v build/install/lib/lib* ./sherpa-onnx/flutter/macos/
+
+          echo "--------------------"
+
+          ls -lh ./sherpa-onnx/flutter/macos/
+
+      - name: Download model files
+        shell: bash
+        run: |
+          cd sherpa-onnx/flutter
+          pushd example/assets
+
+          curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speaker-recongition-models/3dspeaker_speech_eres2net_base_sv_zh-cn_3dspeaker_16k.onnx
+          git clone https://github.com/csukuangfj/sr-data
+
+          rm -rf sr-data/.git
+          popd
+
+
+      - name: Build flutter
+        shell: bash
+        run: |
+          d=$PWD
+
+          pushd sherpa-onnx/flutter
+          dart pub get
+
+          cd example
+          flutter build macos
+
+          pushd build/macos/Build/Products/Release/
+          tar cjfv sherpa_onnx.app.tar.bz2 ./sherpa_onnx.app
+          ls -lh
+          mv sherpa_onnx.app.tar.bz2 $d
+          popd
+
+          popd
+
+          ls -lh sherpa_onnx.app.tar.bz2
+
+      - uses: actions/upload-artifact@v4
+        if: matrix.os == 'macos-latest'
+        with:
+          name: flutter-sherpa-onnx-app-macos
+          path: ./sherpa_onnx.app.tar.bz2

 cmake_minimum_required(VERSION 3.13 FATAL_ERROR)
 cmake_minimum_required(VERSION 3.13 FATAL_ERROR)
+
+set(CMAKE_OSX_DEPLOYMENT_TARGET "10.14" CACHE STRING "Minimum OS X deployment version. Used only for macOS")
+
 project(sherpa-onnx)
 project(sherpa-onnx)
 
 
 set(SHERPA_ONNX_VERSION "1.9.25")
 set(SHERPA_ONNX_VERSION "1.9.25")

+# Do not remove or rename entries in this file, only add new ones
+# See https://github.com/flutter/flutter/issues/128635 for more context.
+
+# Miscellaneous
+*.class
+*.lock
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# Visual Studio Code related
+.classpath
+.project
+.settings/
+.vscode/*
+
+# Flutter repo-specific
+/bin/cache/
+/bin/internal/bootstrap.bat
+/bin/internal/bootstrap.sh
+/bin/mingit/
+/dev/benchmarks/mega_gallery/
+/dev/bots/.recipe_deps
+/dev/bots/android_tools/
+/dev/devicelab/ABresults*.json
+/dev/docs/doc/
+/dev/docs/api_docs.zip
+/dev/docs/flutter.docs.zip
+/dev/docs/lib/
+/dev/docs/pubspec.yaml
+/dev/integration_tests/**/xcuserdata
+/dev/integration_tests/**/Pods
+/packages/flutter/coverage/
+version
+analysis_benchmark.json
+
+# packages file containing multi-root paths
+.packages.generated
+
+# Flutter/Dart/Pub related
+**/doc/api/
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+**/generated_plugin_registrant.dart
+.packages
+.pub-preload-cache/
+.pub-cache/
+.pub/
+build/
+flutter_*.png
+linked_*.ds
+unlinked.ds
+unlinked_spec.ds
+
+# Android related
+**/android/**/gradle-wrapper.jar
+.gradle/
+**/android/captures/
+**/android/gradlew
+**/android/gradlew.bat
+**/android/local.properties
+**/android/**/GeneratedPluginRegistrant.java
+**/android/key.properties
+*.jks
+
+# iOS/XCode related
+**/ios/**/*.mode1v3
+**/ios/**/*.mode2v3
+**/ios/**/*.moved-aside
+**/ios/**/*.pbxuser
+**/ios/**/*.perspectivev3
+**/ios/**/*sync/
+**/ios/**/.sconsign.dblite
+**/ios/**/.tags*
+**/ios/**/.vagrant/
+**/ios/**/DerivedData/
+**/ios/**/Icon?
+**/ios/**/Pods/
+**/ios/**/.symlinks/
+**/ios/**/profile
+**/ios/**/xcuserdata
+**/ios/.generated/
+**/ios/Flutter/.last_build_id
+**/ios/Flutter/App.framework
+**/ios/Flutter/Flutter.framework
+**/ios/Flutter/Flutter.podspec
+**/ios/Flutter/Generated.xcconfig
+**/ios/Flutter/ephemeral
+**/ios/Flutter/app.flx
+**/ios/Flutter/app.zip
+**/ios/Flutter/flutter_assets/
+**/ios/Flutter/flutter_export_environment.sh
+**/ios/ServiceDefinitions.json
+**/ios/Runner/GeneratedPluginRegistrant.*
+
+# macOS
+**/Flutter/ephemeral/
+**/Pods/
+**/macos/Flutter/GeneratedPluginRegistrant.swift
+**/macos/Flutter/ephemeral
+**/xcuserdata/
+
+# Windows
+**/windows/flutter/generated_plugin_registrant.cc
+**/windows/flutter/generated_plugin_registrant.h
+**/windows/flutter/generated_plugins.cmake
+
+# Linux
+**/linux/flutter/generated_plugin_registrant.cc
+**/linux/flutter/generated_plugin_registrant.h
+**/linux/flutter/generated_plugins.cmake
+
+# Coverage
+coverage/
+
+# Symbols
+app.*.symbols
+
+# Exceptions to above rules.
+!**/ios/**/default.mode1v3
+!**/ios/**/default.mode2v3
+!**/ios/**/default.pbxuser
+!**/ios/**/default.perspectivev3
+!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
+!/dev/ci/**/Gemfile.lock
+!.vscode/settings.json
+
+## User settings
+xcuserdata/
+
+## Xcode 8 and earlier
+*.xcscmblueprint
+*.xccheckout

+
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+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

+# Introduction
+
+## Speaker identification
+
+```bash
+# switch to this directory and run
+
+wget https://github.com/k2-fsa/sherpa-onnx/releases/download/speaker-recongition-models/3dspeaker_speech_eres2net_base_sv_zh-cn_3dspeaker_16k.onnx
+git clone https://github.com/csukuangfj/sr-data
+
+rm -rf sr-data/.git
+```

+// Copyright (c)  2024  Xiaomi Corporation
+import 'package:sherpa_onnx/sherpa_onnx.dart' as sherpa_onnx;
+import 'package:flutter/material.dart';
+import "./speaker_identification_test.dart";
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+  // This widget is the root of your application.
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Demo',
+      theme: ThemeData(
+        // This is the theme of your application.
+        //
+        // Try running your application with "flutter run". You'll see the
+        // application has a blue toolbar. Then, without quitting the app, try
+        // changing the primarySwatch below to Colors.green and then invoke
+        // "hot reload" (press "r" in the console where you ran "flutter run",
+        // or simply save your changes to "hot reload" in a Flutter IDE).
+        // Notice that the counter didn't reset back to zero; the application
+        // is not restarted.
+        primarySwatch: Colors.blue,
+      ),
+      home: const MyHomePage(title: 'Flutter Demo Home Page'),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  const MyHomePage({Key? key, required this.title}) : super(key: key);
+  // This widget is the home page of your application. It is stateful, meaning
+  // that it has a State object (defined below) that contains fields that affect
+  // how it looks.
+  // This class is the configuration for the state. It holds the values (in this
+  // case the title) provided by the parent (in this case the App widget) and
+  // used by the build method of the State. Fields in a Widget subclass are
+  // always marked "final".
+  final String title;
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  int _counter = 0;
+  Future<void> _incrementCounter() async {
+    if (_counter <= 10) {
+      sherpa_onnx.initBindings();
+      await testSpeakerID();
+    }
+
+    setState(() {
+      // This call to setState tells the Flutter framework that something has
+      // changed in this State, which causes it to rerun the build method below
+      // so that the display can reflect the updated values. If we changed
+      // _counter without calling setState(), then the build method would not be
+      // called again, and so nothing would appear to happen.
+      _counter++;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    // This method is rerun every time setState is called, for instance as done
+    // by the _incrementCounter method above.
+    //
+    // The Flutter framework has been optimized to make rerunning build methods
+    // fast, so that you can just rebuild anything that needs updating rather
+    // than having to individually change instances of widgets.
+    return Scaffold(
+      appBar: AppBar(
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
+        title: Text(widget.title),
+      ),
+      body: Center(
+        // Center is a layout widget. It takes a single child and positions it
+        // in the middle of the parent.
+        child: Column(
+          // Column is also a layout widget. It takes a list of children and
+          // arranges them vertically. By default, it sizes itself to fit its
+          // children horizontally, and tries to be as tall as its parent.
+          //
+          // Invoke "debug painting" (press "p" in the console, choose the
+          // "Toggle Debug Paint" action from the Flutter Inspector in Android
+          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
+          // to see the wireframe for each widget.
+          //
+          // Column has various properties to control how it sizes itself and
+          // how it positions its children. Here we use mainAxisAlignment to
+          // center the children vertically; the main axis here is the vertical
+          // axis because Columns are vertical (the cross axis would be
+          // horizontal).
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            const Text(
+              'You have pushed the button this many times:',
+            ),
+            Text(
+              '$_counter',
+              style: Theme.of(context).textTheme.headlineSmall,
+            ),
+          ],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _incrementCounter,
+        tooltip: 'Increment',
+        child: const Icon(Icons.add),
+      ), // This trailing comma makes auto-formatting nicer for build methods.
+    );
+  }
+}

+// Copyright (c)  2024  Xiaomi Corporation
+import 'package:sherpa_onnx/sherpa_onnx.dart' as sherpa_onnx;
+import 'dart:typed_data';
+import 'package:path/path.dart';
+import './utils.dart';
+
+Float32List computeEmbedding(
+    {required sherpa_onnx.SpeakerEmbeddingExtractor extractor,
+    required String filename}) {
+  final stream = extractor.createStream();
+  final waveData = sherpa_onnx.readWave(filename);
+
+  stream.acceptWaveform(
+      samples: waveData.samples, sampleRate: waveData.sampleRate);
+
+  stream.inputFinished();
+
+  final embedding = extractor.compute(stream);
+
+  stream.free();
+
+  return embedding;
+}
+
+Future<void> testSpeakerID() async {
+  final src =
+      'assets/3dspeaker_speech_eres2net_base_sv_zh-cn_3dspeaker_16k.onnx';
+  final modelPath = await copyAssetFile(src: src, dst: 'model.onnx');
+
+  final config = sherpa_onnx.SpeakerEmbeddingExtractorConfig(model: modelPath);
+  final extractor = sherpa_onnx.SpeakerEmbeddingExtractor(config: config);
+
+  const _spk1Files = [
+    'assets/sr-data/enroll/fangjun-sr-1.wav',
+    'assets/sr-data/enroll/fangjun-sr-2.wav',
+    'assets/sr-data/enroll/fangjun-sr-3.wav',
+  ];
+  final spk1Files = <String>[];
+  for (final f in _spk1Files) {
+    spk1Files.add(await copyAssetFile(src: f, dst: basename(f)));
+  }
+
+  final spk1Vec = <Float32List>[];
+  for (final f in spk1Files) {
+    spk1Vec.add(computeEmbedding(extractor: extractor, filename: f));
+  }
+
+  const _spk2Files = [
+    'assets/sr-data/enroll/leijun-sr-1.wav',
+    'assets/sr-data/enroll/leijun-sr-2.wav',
+  ];
+  final spk2Files = <String>[];
+  for (final f in _spk2Files) {
+    spk2Files.add(await copyAssetFile(src: f, dst: basename(f)));
+  }
+
+  final spk2Vec = <Float32List>[];
+  for (final f in spk2Files) {
+    spk2Vec.add(computeEmbedding(extractor: extractor, filename: f));
+  }
+
+  final manager = sherpa_onnx.SpeakerEmbeddingManager(extractor.dim);
+  assert(manager.numSpeakers == 0, '${manager.numSpeakers}');
+
+  bool ok = manager.addMulti(name: 'fangjun', embeddingList: spk1Vec);
+  assert(ok, "Failed to add fangjun");
+  assert(manager.numSpeakers == 1, '${manager.numSpeakers}');
+
+  ok = manager.addMulti(name: 'leijun', embeddingList: spk2Vec);
+  assert(ok, "Failed to add leijun");
+  assert(manager.numSpeakers == 2, '${manager.numSpeakers}');
+
+  bool found = manager.contains('fangjun');
+  assert(found, 'Failed to find fangjun');
+
+  found = manager.contains('leijun');
+  assert(found, 'Failed to find leijun');
+
+  print('---All speakers---');
+
+  print(manager.allSpeakerNames);
+
+  print('------------');
+
+  const _testFiles = [
+    'assets/sr-data/test/fangjun-test-sr-1.wav',
+    'assets/sr-data/test/leijun-test-sr-1.wav',
+    'assets/sr-data/test/liudehua-test-sr-1.wav',
+  ];
+
+  final testFiles = <String>[];
+  for (final f in _testFiles) {
+    testFiles.add(await copyAssetFile(src: f, dst: basename(f)));
+  }
+
+  const threshold = 0.6;
+
+  for (final f in testFiles) {
+    final embedding = computeEmbedding(extractor: extractor, filename: f);
+
+    var name = manager.search(embedding: embedding, threshold: threshold);
+    if (name == '') {
+      name = '<Unknown>';
+    }
+    print('${f}: ${name}');
+  }
+
+  ok = manager.verify(
+      name: 'fangjun',
+      embedding: computeEmbedding(extractor: extractor, filename: testFiles[0]),
+      threshold: threshold);
+  assert(ok, 'Failed to verify fangjun using ${testFiles[0]}');
+
+  ok = manager.remove('fangjun');
+  assert(ok, 'Failed to remove fangjun');
+  assert(manager.numSpeakers == 1, '${manager.numSpeakers}');
+
+  found = manager.contains('fangjun');
+  assert(!found, 'Still found fangjun!');
+
+  ok = manager.verify(
+      name: 'fangjun',
+      embedding: computeEmbedding(extractor: extractor, filename: testFiles[0]),
+      threshold: threshold);
+  assert(!ok, '${testFiles[0]}');
+
+  manager.free();
+  extractor.free();
+}

+// Copyright (c)  2024  Xiaomi Corporation
+import 'package:path/path.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:flutter/services.dart' show rootBundle;
+import "dart:io";
+
+// Copy the asset file from src to dst
+Future<String> copyAssetFile({required String src, required String dst}) async {
+  final Directory directory = await getApplicationDocumentsDirectory();
+  final target = join(directory.path, dst);
+
+  final data = await rootBundle.load(src);
+  final List<int> bytes =
+      data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
+  await File(target).writeAsBytes(bytes);
+
+  return target;
+}

+# Flutter-related
+**/Flutter/ephemeral/
+**/Pods/
+
+# Xcode-related
+**/dgph
+**/xcuserdata/

+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include "ephemeral/Flutter-Generated.xcconfig"

+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include "ephemeral/Flutter-Generated.xcconfig"

+platform :osx, '10.14'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'ephemeral', 'Flutter-Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure \"flutter pub get\" is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Flutter-Generated.xcconfig, then run \"flutter pub get\""
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_macos_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+  use_modular_headers!
+
+  flutter_install_all_macos_pods File.dirname(File.realpath(__FILE__))
+  target 'RunnerTests' do
+    inherit! :search_paths
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_macos_build_settings(target)
+  end
+end

+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 54;
+	objects = {
+
+/* Begin PBXAggregateTarget section */
+		33CC111A2044C6BA0003C045 /* Flutter Assemble */ = {
+			isa = PBXAggregateTarget;
+			buildConfigurationList = 33CC111B2044C6BA0003C045 /* Build configuration list for PBXAggregateTarget "Flutter Assemble" */;
+			buildPhases = (
+				33CC111E2044C6BF0003C045 /* ShellScript */,
+			);
+			dependencies = (
+			);
+			name = "Flutter Assemble";
+			productName = FLX;
+		};
+/* End PBXAggregateTarget section */
+
+/* Begin PBXBuildFile section */
+		331C80D8294CF71000263BE5 /* RunnerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 331C80D7294CF71000263BE5 /* RunnerTests.swift */; };
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+		33CC10F12044A3C60003C045 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 33CC10F02044A3C60003C045 /* AppDelegate.swift */; };
+		33CC10F32044A3C60003C045 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F22044A3C60003C045 /* Assets.xcassets */; };
+		33CC10F62044A3C60003C045 /* MainMenu.xib in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F42044A3C60003C045 /* MainMenu.xib */; };
+		33CC11132044BFA00003C045 /* MainFlutterWindow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 33CC11122044BFA00003C045 /* MainFlutterWindow.swift */; };
+		AD18C81BD25EB64A10A74721 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 3EEF159F4D7912B9311CB282 /* Pods_Runner.framework */; };
+		F1F6B0C655533B7F45E75DA0 /* Pods_RunnerTests.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = BA92A3C1CA5533C24C7C7468 /* Pods_RunnerTests.framework */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXContainerItemProxy section */
+		331C80D9294CF71000263BE5 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 33CC10E52044A3C60003C045 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 33CC10EC2044A3C60003C045;
+			remoteInfo = Runner;
+		};
+		33CC111F2044C79F0003C045 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 33CC10E52044A3C60003C045 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 33CC111A2044C6BA0003C045;
+			remoteInfo = FLX;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		33CC110E2044A8840003C045 /* Bundle Framework */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Bundle Framework";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		09EF98B2CF4F049F4C7B5BAA /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
+		331C80D5294CF71000263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
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+		333000ED22D3DE5D00554162 /* Warnings.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Warnings.xcconfig; sourceTree = "<group>"; };
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+		33CC10ED2044A3C60003C045 /* sherpa_onnx.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = sherpa_onnx.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		33CC10F02044A3C60003C045 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
+		33CC10F22044A3C60003C045 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; name = Assets.xcassets; path = Runner/Assets.xcassets; sourceTree = "<group>"; };
+		33CC10F52044A3C60003C045 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/MainMenu.xib; sourceTree = "<group>"; };
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+			buildActionMask = 2147483647;
+			files = (
+				F1F6B0C655533B7F45E75DA0 /* Pods_RunnerTests.framework in Frameworks */,
+			);
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+		};
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+			buildActionMask = 2147483647;
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+				AD18C81BD25EB64A10A74721 /* Pods_Runner.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		331C80D6294CF71000263BE5 /* RunnerTests */ = {
+			isa = PBXGroup;
+			children = (
+				331C80D7294CF71000263BE5 /* RunnerTests.swift */,
+			);
+			path = RunnerTests;
+			sourceTree = "<group>";
+		};
+		33BA886A226E78AF003329D5 /* Configs */ = {
+			isa = PBXGroup;
+			children = (
+				33E5194F232828860026EE4D /* AppInfo.xcconfig */,
+				9740EEB21CF90195004384FC /* Debug.xcconfig */,
+				7AFA3C8E1D35360C0083082E /* Release.xcconfig */,
+				333000ED22D3DE5D00554162 /* Warnings.xcconfig */,
+			);
+			path = Configs;
+			sourceTree = "<group>";
+		};
+		33CC10E42044A3C60003C045 = {
+			isa = PBXGroup;
+			children = (
+				33FAB671232836740065AC1E /* Runner */,
+				33CEB47122A05771004F2AC0 /* Flutter */,
+				331C80D6294CF71000263BE5 /* RunnerTests */,
+				33CC10EE2044A3C60003C045 /* Products */,
+				D73912EC22F37F3D000D13A0 /* Frameworks */,
+				782733D97D5852B42F7DAD3B /* Pods */,
+			);
+			sourceTree = "<group>";
+		};
+		33CC10EE2044A3C60003C045 /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				33CC10ED2044A3C60003C045 /* sherpa_onnx.app */,
+				331C80D5294CF71000263BE5 /* RunnerTests.xctest */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
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+			isa = PBXGroup;
+			children = (
+				33CC10F22044A3C60003C045 /* Assets.xcassets */,
+				33CC10F42044A3C60003C045 /* MainMenu.xib */,
+				33CC10F72044A3C60003C045 /* Info.plist */,
+			);
+			name = Resources;
+			path = ..;
+			sourceTree = "<group>";
+		};
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+			isa = PBXGroup;
+			children = (
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+				33CEB47222A05771004F2AC0 /* Flutter-Debug.xcconfig */,
+				33CEB47422A05771004F2AC0 /* Flutter-Release.xcconfig */,
+				33CEB47722A0578A004F2AC0 /* Flutter-Generated.xcconfig */,
+			);
+			path = Flutter;
+			sourceTree = "<group>";
+		};
+		33FAB671232836740065AC1E /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				33CC10F02044A3C60003C045 /* AppDelegate.swift */,
+				33CC11122044BFA00003C045 /* MainFlutterWindow.swift */,
+				33E51913231747F40026EE4D /* DebugProfile.entitlements */,
+				33E51914231749380026EE4D /* Release.entitlements */,
+				33CC11242044D66E0003C045 /* Resources */,
+				33BA886A226E78AF003329D5 /* Configs */,
+			);
+			path = Runner;
+			sourceTree = "<group>";
+		};
+		782733D97D5852B42F7DAD3B /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				A1236548122E91133BF39DA1 /* Pods-Runner.debug.xcconfig */,
+				09EF98B2CF4F049F4C7B5BAA /* Pods-Runner.release.xcconfig */,
+				CDC9FAA17691FA4BA5F49074 /* Pods-Runner.profile.xcconfig */,
+				E3A16097032C820A141E3D0C /* Pods-RunnerTests.debug.xcconfig */,
+				C9A014A0AF0A3CC243C5BA0C /* Pods-RunnerTests.release.xcconfig */,
+				F7379309434F931B509C87FA /* Pods-RunnerTests.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
+		D73912EC22F37F3D000D13A0 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				3EEF159F4D7912B9311CB282 /* Pods_Runner.framework */,
+				BA92A3C1CA5533C24C7C7468 /* Pods_RunnerTests.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		331C80D4294CF70F00263BE5 /* RunnerTests */ = {
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+				331C80D1294CF70F00263BE5 /* Sources */,
+				331C80D2294CF70F00263BE5 /* Frameworks */,
+				331C80D3294CF70F00263BE5 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				331C80DA294CF71000263BE5 /* PBXTargetDependency */,
+			);
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+			productType = "com.apple.product-type.bundle.unit-test";
+		};
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+			isa = PBXNativeTarget;
+			buildConfigurationList = 33CC10FB2044A3C60003C045 /* Build configuration list for PBXNativeTarget "Runner" */;
+			buildPhases = (
+				1CEDB7D27400A1C1B87B926C /* [CP] Check Pods Manifest.lock */,
+				33CC10E92044A3C60003C045 /* Sources */,
+				33CC10EA2044A3C60003C045 /* Frameworks */,
+				33CC10EB2044A3C60003C045 /* Resources */,
+				33CC110E2044A8840003C045 /* Bundle Framework */,
+				3399D490228B24CF009A79C7 /* ShellScript */,
+				C2CEDA50A000327A806944DD /* [CP] Embed Pods Frameworks */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				33CC11202044C79F0003C045 /* PBXTargetDependency */,
+			);
+			name = Runner;
+			productName = Runner;
+			productReference = 33CC10ED2044A3C60003C045 /* sherpa_onnx.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		33CC10E52044A3C60003C045 /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				BuildIndependentTargetsInParallel = YES;
+				LastSwiftUpdateCheck = 0920;
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+				TargetAttributes = {
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+		33CC111B2044C6BA0003C045 /* Build configuration list for PBXAggregateTarget "Flutter Assemble" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				33CC111C2044C6BA0003C045 /* Debug */,
+				33CC111D2044C6BA0003C045 /* Release */,
+				338D0CEB231458BD00FA5F75 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 33CC10E52044A3C60003C045 /* Project object */;
+}

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1510"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+               BuildableName = "sherpa_onnx.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+            BuildableName = "sherpa_onnx.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "331C80D4294CF70F00263BE5"
+               BuildableName = "RunnerTests.xctest"
+               BlueprintName = "RunnerTests"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+            BuildableName = "sherpa_onnx.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "33CC10EC2044A3C60003C045"
+            BuildableName = "sherpa_onnx.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

+import Cocoa
+import FlutterMacOS
+
+@NSApplicationMain
+class AppDelegate: FlutterAppDelegate {
+  override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
+    return true
+  }
+}

+{
+  "images" : [
+    {
+      "size" : "16x16",
+      "idiom" : "mac",
+      "filename" : "app_icon_16.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "16x16",
+      "idiom" : "mac",
+      "filename" : "app_icon_32.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "32x32",
+      "idiom" : "mac",
+      "filename" : "app_icon_32.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "32x32",
+      "idiom" : "mac",
+      "filename" : "app_icon_64.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "128x128",
+      "idiom" : "mac",
+      "filename" : "app_icon_128.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "128x128",
+      "idiom" : "mac",
+      "filename" : "app_icon_256.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "256x256",
+      "idiom" : "mac",
+      "filename" : "app_icon_256.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "256x256",
+      "idiom" : "mac",
+      "filename" : "app_icon_512.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "512x512",
+      "idiom" : "mac",
+      "filename" : "app_icon_512.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "512x512",
+      "idiom" : "mac",
+      "filename" : "app_icon_1024.png",
+      "scale" : "2x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="14490.70" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+    <dependencies>
+        <deployment identifier="macosx"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14490.70"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <objects>
+        <customObject id="-2" userLabel="File's Owner" customClass="NSApplication">
+            <connections>
+                <outlet property="delegate" destination="Voe-Tx-rLC" id="GzC-gU-4Uq"/>
+            </connections>
+        </customObject>
+        <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
+        <customObject id="-3" userLabel="Application" customClass="NSObject"/>
+        <customObject id="Voe-Tx-rLC" customClass="AppDelegate" customModule="Runner" customModuleProvider="target">
+            <connections>
+                <outlet property="applicationMenu" destination="uQy-DD-JDr" id="XBo-yE-nKs"/>
+                <outlet property="mainFlutterWindow" destination="QvC-M9-y7g" id="gIp-Ho-8D9"/>
+            </connections>
+        </customObject>
+        <customObject id="YLy-65-1bz" customClass="NSFontManager"/>
+        <menu title="Main Menu" systemMenu="main" id="AYu-sK-qS6">
+            <items>
+                <menuItem title="APP_NAME" id="1Xt-HY-uBw">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="APP_NAME" systemMenu="apple" id="uQy-DD-JDr">
+                        <items>
+                            <menuItem title="About APP_NAME" id="5kV-Vb-QxS">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="orderFrontStandardAboutPanel:" target="-1" id="Exp-CZ-Vem"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="VOq-y0-SEH"/>
+                            <menuItem title="Preferences…" keyEquivalent="," id="BOF-NM-1cW"/>
+                            <menuItem isSeparatorItem="YES" id="wFC-TO-SCJ"/>
+                            <menuItem title="Services" id="NMo-om-nkz">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Services" systemMenu="services" id="hz9-B4-Xy5"/>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="4je-JR-u6R"/>
+                            <menuItem title="Hide APP_NAME" keyEquivalent="h" id="Olw-nP-bQN">
+                                <connections>
+                                    <action selector="hide:" target="-1" id="PnN-Uc-m68"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Hide Others" keyEquivalent="h" id="Vdr-fp-XzO">
+                                <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
+                                <connections>
+                                    <action selector="hideOtherApplications:" target="-1" id="VT4-aY-XCT"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Show All" id="Kd2-mp-pUS">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="unhideAllApplications:" target="-1" id="Dhg-Le-xox"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="kCx-OE-vgT"/>
+                            <menuItem title="Quit APP_NAME" keyEquivalent="q" id="4sb-4s-VLi">
+                                <connections>
+                                    <action selector="terminate:" target="-1" id="Te7-pn-YzF"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Edit" id="5QF-Oa-p0T">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="Edit" id="W48-6f-4Dl">
+                        <items>
+                            <menuItem title="Undo" keyEquivalent="z" id="dRJ-4n-Yzg">
+                                <connections>
+                                    <action selector="undo:" target="-1" id="M6e-cu-g7V"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Redo" keyEquivalent="Z" id="6dh-zS-Vam">
+                                <connections>
+                                    <action selector="redo:" target="-1" id="oIA-Rs-6OD"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="WRV-NI-Exz"/>
+                            <menuItem title="Cut" keyEquivalent="x" id="uRl-iY-unG">
+                                <connections>
+                                    <action selector="cut:" target="-1" id="YJe-68-I9s"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Copy" keyEquivalent="c" id="x3v-GG-iWU">
+                                <connections>
+                                    <action selector="copy:" target="-1" id="G1f-GL-Joy"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Paste" keyEquivalent="v" id="gVA-U4-sdL">
+                                <connections>
+                                    <action selector="paste:" target="-1" id="UvS-8e-Qdg"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Paste and Match Style" keyEquivalent="V" id="WeT-3V-zwk">
+                                <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
+                                <connections>
+                                    <action selector="pasteAsPlainText:" target="-1" id="cEh-KX-wJQ"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Delete" id="pa3-QI-u2k">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="delete:" target="-1" id="0Mk-Ml-PaM"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Select All" keyEquivalent="a" id="Ruw-6m-B2m">
+                                <connections>
+                                    <action selector="selectAll:" target="-1" id="VNm-Mi-diN"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="uyl-h8-XO2"/>
+                            <menuItem title="Find" id="4EN-yA-p0u">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Find" id="1b7-l0-nxx">
+                                    <items>
+                                        <menuItem title="Find…" tag="1" keyEquivalent="f" id="Xz5-n4-O0W">
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="cD7-Qs-BN4"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Find and Replace…" tag="12" keyEquivalent="f" id="YEy-JH-Tfz">
+                                            <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="WD3-Gg-5AJ"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Find Next" tag="2" keyEquivalent="g" id="q09-fT-Sye">
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="NDo-RZ-v9R"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Find Previous" tag="3" keyEquivalent="G" id="OwM-mh-QMV">
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="HOh-sY-3ay"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Use Selection for Find" tag="7" keyEquivalent="e" id="buJ-ug-pKt">
+                                            <connections>
+                                                <action selector="performFindPanelAction:" target="-1" id="U76-nv-p5D"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Jump to Selection" keyEquivalent="j" id="S0p-oC-mLd">
+                                            <connections>
+                                                <action selector="centerSelectionInVisibleArea:" target="-1" id="IOG-6D-g5B"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Spelling and Grammar" id="Dv1-io-Yv7">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Spelling" id="3IN-sU-3Bg">
+                                    <items>
+                                        <menuItem title="Show Spelling and Grammar" keyEquivalent=":" id="HFo-cy-zxI">
+                                            <connections>
+                                                <action selector="showGuessPanel:" target="-1" id="vFj-Ks-hy3"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Check Document Now" keyEquivalent=";" id="hz2-CU-CR7">
+                                            <connections>
+                                                <action selector="checkSpelling:" target="-1" id="fz7-VC-reM"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem isSeparatorItem="YES" id="bNw-od-mp5"/>
+                                        <menuItem title="Check Spelling While Typing" id="rbD-Rh-wIN">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleContinuousSpellChecking:" target="-1" id="7w6-Qz-0kB"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Check Grammar With Spelling" id="mK6-2p-4JG">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleGrammarChecking:" target="-1" id="muD-Qn-j4w"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Correct Spelling Automatically" id="78Y-hA-62v">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticSpellingCorrection:" target="-1" id="2lM-Qi-WAP"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Substitutions" id="9ic-FL-obx">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Substitutions" id="FeM-D8-WVr">
+                                    <items>
+                                        <menuItem title="Show Substitutions" id="z6F-FW-3nz">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="orderFrontSubstitutionsPanel:" target="-1" id="oku-mr-iSq"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem isSeparatorItem="YES" id="gPx-C9-uUO"/>
+                                        <menuItem title="Smart Copy/Paste" id="9yt-4B-nSM">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleSmartInsertDelete:" target="-1" id="3IJ-Se-DZD"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Smart Quotes" id="hQb-2v-fYv">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticQuoteSubstitution:" target="-1" id="ptq-xd-QOA"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Smart Dashes" id="rgM-f4-ycn">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticDashSubstitution:" target="-1" id="oCt-pO-9gS"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Smart Links" id="cwL-P1-jid">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticLinkDetection:" target="-1" id="Gip-E3-Fov"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Data Detectors" id="tRr-pd-1PS">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticDataDetection:" target="-1" id="R1I-Nq-Kbl"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Text Replacement" id="HFQ-gK-NFA">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticTextReplacement:" target="-1" id="DvP-Fe-Py6"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Transformations" id="2oI-Rn-ZJC">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Transformations" id="c8a-y6-VQd">
+                                    <items>
+                                        <menuItem title="Make Upper Case" id="vmV-6d-7jI">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="uppercaseWord:" target="-1" id="sPh-Tk-edu"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Make Lower Case" id="d9M-CD-aMd">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="lowercaseWord:" target="-1" id="iUZ-b5-hil"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Capitalize" id="UEZ-Bs-lqG">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="capitalizeWord:" target="-1" id="26H-TL-nsh"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Speech" id="xrE-MZ-jX0">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <menu key="submenu" title="Speech" id="3rS-ZA-NoH">
+                                    <items>
+                                        <menuItem title="Start Speaking" id="Ynk-f8-cLZ">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="startSpeaking:" target="-1" id="654-Ng-kyl"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Stop Speaking" id="Oyz-dy-DGm">
+                                            <modifierMask key="keyEquivalentModifierMask"/>
+                                            <connections>
+                                                <action selector="stopSpeaking:" target="-1" id="dX8-6p-jy9"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="View" id="H8h-7b-M4v">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="View" id="HyV-fh-RgO">
+                        <items>
+                            <menuItem title="Enter Full Screen" keyEquivalent="f" id="4J7-dP-txa">
+                                <modifierMask key="keyEquivalentModifierMask" control="YES" command="YES"/>
+                                <connections>
+                                    <action selector="toggleFullScreen:" target="-1" id="dU3-MA-1Rq"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Window" id="aUF-d1-5bR">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="Window" systemMenu="window" id="Td7-aD-5lo">
+                        <items>
+                            <menuItem title="Minimize" keyEquivalent="m" id="OY7-WF-poV">
+                                <connections>
+                                    <action selector="performMiniaturize:" target="-1" id="VwT-WD-YPe"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Zoom" id="R4o-n2-Eq4">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="performZoom:" target="-1" id="DIl-cC-cCs"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="eu3-7i-yIM"/>
+                            <menuItem title="Bring All to Front" id="LE2-aR-0XJ">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="arrangeInFront:" target="-1" id="DRN-fu-gQh"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Help" id="EPT-qC-fAb">
+                    <modifierMask key="keyEquivalentModifierMask"/>
+                    <menu key="submenu" title="Help" systemMenu="help" id="rJ0-wn-3NY"/>
+                </menuItem>
+            </items>
+            <point key="canvasLocation" x="142" y="-258"/>
+        </menu>
+        <window title="APP_NAME" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" releasedWhenClosed="NO" animationBehavior="default" id="QvC-M9-y7g" customClass="MainFlutterWindow" customModule="Runner" customModuleProvider="target">
+            <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES"/>
+            <rect key="contentRect" x="335" y="390" width="800" height="600"/>
+            <rect key="screenRect" x="0.0" y="0.0" width="2560" height="1577"/>
+            <view key="contentView" wantsLayer="YES" id="EiT-Mj-1SZ">
+                <rect key="frame" x="0.0" y="0.0" width="800" height="600"/>
+                <autoresizingMask key="autoresizingMask"/>
+            </view>
+        </window>
+    </objects>
+</document>

+// Application-level settings for the Runner target.
+//
+// This may be replaced with something auto-generated from metadata (e.g., pubspec.yaml) in the
+// future. If not, the values below would default to using the project name when this becomes a
+// 'flutter create' template.
+
+// The application's name. By default this is also the title of the Flutter window.
+PRODUCT_NAME = sherpa_onnx
+
+// The application's bundle identifier
+PRODUCT_BUNDLE_IDENTIFIER = com.k2fsa.sherpa.onnx
+
+// The copyright displayed in application information
+PRODUCT_COPYRIGHT = Copyright © 2024 com.k2fsa.sherpa.onnx. All rights reserved.

+#include "../../Flutter/Flutter-Debug.xcconfig"
+#include "Warnings.xcconfig"

+#include "../../Flutter/Flutter-Release.xcconfig"
+#include "Warnings.xcconfig"

+WARNING_CFLAGS = -Wall -Wconditional-uninitialized -Wnullable-to-nonnull-conversion -Wmissing-method-return-type -Woverlength-strings
+GCC_WARN_UNDECLARED_SELECTOR = YES
+CLANG_UNDEFINED_BEHAVIOR_SANITIZER_NULLABILITY = YES
+CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE
+CLANG_WARN__DUPLICATE_METHOD_MATCH = YES
+CLANG_WARN_PRAGMA_PACK = YES
+CLANG_WARN_STRICT_PROTOTYPES = YES
+CLANG_WARN_COMMA = YES
+GCC_WARN_STRICT_SELECTOR_MATCH = YES
+CLANG_WARN_OBJC_REPEATED_USE_OF_WEAK = YES
+CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES
+GCC_WARN_SHADOW = YES
+CLANG_WARN_UNREACHABLE_CODE = YES

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+	<key>com.apple.security.cs.allow-jit</key>
+	<true/>
+	<key>com.apple.security.network.server</key>
+	<true/>
+</dict>
+</plist>

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIconFile</key>
+	<string></string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>$(PRODUCT_COPYRIGHT)</string>
+	<key>NSMainNibFile</key>
+	<string>MainMenu</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+</dict>
+</plist>

+import Cocoa
+import FlutterMacOS
+
+class MainFlutterWindow: NSWindow {
+  override func awakeFromNib() {
+    let flutterViewController = FlutterViewController()
+    let windowFrame = self.frame
+    self.contentViewController = flutterViewController
+    self.setFrame(windowFrame, display: true)
+
+    RegisterGeneratedPlugins(registry: flutterViewController)
+
+    super.awakeFromNib()
+  }
+}

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+</dict>
+</plist>

+import Cocoa
+import FlutterMacOS
+import XCTest
+
+class RunnerTests: XCTestCase {
+
+  func testExample() {
+    // If you add code to the Runner application, consider adding tests here.
+    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+  }
+
+}

+name: hello_sherpa_onnx
+description: "Demonstrates how to use the sherpa_onnx ffi plugin."
+# The following line prevents the package from being accidentally published to
+# pub.dev using `flutter pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+# The following defines the version and build number for your application.
+# A version number is three numbers separated by dots, like 1.2.43
+# followed by an optional build number separated by a +.
+# Both the version and the builder number may be overridden in flutter
+# build by specifying --build-name and --build-number, respectively.
+# In Android, build-name is used as versionName while build-number used as versionCode.
+# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
+# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
+# Read more about iOS versioning at
+# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
+# In Windows, build-name is used as the major, minor, and patch parts
+# of the product and file versions while build-number is used as the build suffix.
+version: 1.0.0+1
+
+environment:
+  sdk: '>=3.4.0 <4.0.0'
+
+# Dependencies specify other packages that your package needs in order to work.
+# To automatically upgrade your package dependencies to the latest versions
+# consider running `flutter pub upgrade --major-versions`. Alternatively,
+# dependencies can be manually updated by changing the version numbers below to
+# the latest version available on pub.dev. To see which dependencies have newer
+# versions available, run `flutter pub outdated`.
+dependencies:
+  flutter:
+    sdk: flutter
+
+  path_provider: ^2.1.3
+  path:
+
+  sherpa_onnx:
+    # When depending on this package from a real application you should use:
+    #   sherpa_onnx: ^x.y.z
+    # See https://dart.dev/tools/pub/dependencies#version-constraints
+    # The example app is bundled with the plugin so we use a path dependency on
+    # the parent directory to use the current plugin's version.
+    path: ../
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^1.0.6
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  # The "flutter_lints" package below contains a set of recommended lints to
+  # encourage good coding practices. The lint set provided by the package is
+  # activated in the `analysis_options.yaml` file located at the root of your
+  # package. See that file for information about deactivating specific lint
+  # rules and activating additional ones.
+  flutter_lints: ^3.0.0
+
+# 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 packages.
+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.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  assets:
+    - assets/
+    - assets/sr-data/enroll/
+    - assets/sr-data/test/
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/assets-and-images/#from-packages
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/custom-fonts/#from-packages

+// Copyright (c)  2024  Xiaomi Corporation
+import 'dart:io';
+import 'dart:ffi';
+
+import 'src/sherpa_onnx_bindings.dart';
+export 'src/speaker_identification.dart';
+export 'src/online_stream.dart';
+export 'src/wave_reader.dart';
+
+final DynamicLibrary _dylib = () {
+  if (Platform.isIOS) {
+    throw UnsupportedError('Unknown platform: ${Platform.operatingSystem}');
+  }
+  if (Platform.isMacOS) {
+    return DynamicLibrary.open('libsherpa-onnx-c-api.dylib');
+  }
+  if (Platform.isAndroid || Platform.isLinux) {
+    return DynamicLibrary.open('libsherpa-onnx-c-api.so');
+  }
+
+  if (Platform.isWindows) {
+    return DynamicLibrary.open('sherpa-onnx-c-api.dll');
+  }
+
+  throw UnsupportedError('Unknown platform: ${Platform.operatingSystem}');
+}();
+
+void initBindings() {
+  SherpaOnnxBindings.init(_dylib);
+}

+// Copyright (c)  2024  Xiaomi Corporation
+import 'dart:typed_data';
+import 'dart:ffi';
+import 'package:ffi/ffi.dart';
+import "./sherpa_onnx_bindings.dart";
+
+class OnlineStream {
+  /// The user has to call OnlineStream.free() to avoid memory leak.
+  OnlineStream({required this.ptr});
+
+  void free() {
+    SherpaOnnxBindings.destroyOnlineStream?.call(ptr);
+    ptr = nullptr;
+  }
+
+  /// If you have List<double> data, then you can use
+  /// Float32List.fromList(data) to convert data to Float32List
+  ///
+  /// See
+  ///  https://api.flutter.dev/flutter/dart-core/List-class.html
+  /// and
+  ///  https://api.flutter.dev/flutter/dart-typed_data/Float32List-class.html
+  void acceptWaveform({required Float32List samples, required int sampleRate}) {
+    final n = samples.length;
+    final Pointer<Float> p = calloc<Float>(n);
+
+    final pList = p.asTypedList(n);
+    pList.setAll(0, samples);
+
+    SherpaOnnxBindings.onlineStreamAcceptWaveform
+        ?.call(this.ptr, sampleRate, p, n);
+
+    calloc.free(p);
+  }
+
+  void inputFinished() {
+    SherpaOnnxBindings.onlineStreamInputFinished?.call(this.ptr);
+  }
+
+  Pointer<SherpaOnnxOnlineStream> ptr;
+}

+// Copyright (c)  2024  Xiaomi Corporation
+import 'dart:ffi';
+import 'package:ffi/ffi.dart';
+
+final class SherpaOnnxWave extends Struct {
+  external Pointer<Float> samples;
+
+  @Int32()
+  external int sampleRate;
+
+  @Int32()
+  external int numSamples;
+}
+
+final class SherpaOnnxSpeakerEmbeddingExtractorConfig extends Struct {
+  external Pointer<Utf8> model;
+
+  @Int32()
+  external int numThreads;
+
+  @Int32()
+  external int debug;
+
+  external Pointer<Utf8> provider;
+}
+
+final class SherpaOnnxOnlineStream extends Opaque {}
+
+final class SherpaOnnxSpeakerEmbeddingExtractor extends Opaque {}
+
+final class SherpaOnnxSpeakerEmbeddingManager extends Opaque {}
+
+typedef SherpaOnnxCreateSpeakerEmbeddingManagerNative
+    = Pointer<SherpaOnnxSpeakerEmbeddingManager> Function(Int32 dim);
+
+typedef SherpaOnnxCreateSpeakerEmbeddingManager
+    = Pointer<SherpaOnnxSpeakerEmbeddingManager> Function(int dim);
+
+typedef SherpaOnnxDestroySpeakerEmbeddingManagerNative = Void Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>);
+
+typedef SherpaOnnxDestroySpeakerEmbeddingManager = void Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerAddNative = Int32 Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Utf8>, Pointer<Float>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerAdd = int Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Utf8>, Pointer<Float>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerAddListFlattenedNative
+    = Int32 Function(Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Utf8>,
+        Pointer<Float>, Int32);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerAddListFlattened = int Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>,
+    Pointer<Utf8>,
+    Pointer<Float>,
+    int);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerRemoveNative = Int32 Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Utf8>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerRemove = int Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Utf8>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerContainsNative = Int32 Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Utf8>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerContains = int Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Utf8>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerSearchNative = Pointer<Utf8> Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Float>, Float);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerSearch = Pointer<Utf8> Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>, Pointer<Float>, double);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerFreeSearchNative = Void Function(
+    Pointer<Utf8>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerFreeSearch = void Function(
+    Pointer<Utf8>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerNumSpeakersNative = Int32 Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerNumSpeakers = int Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerVerifyNative = Int32 Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>,
+    Pointer<Utf8>,
+    Pointer<Float>,
+    Float);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerVerify = int Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingManager>,
+    Pointer<Utf8>,
+    Pointer<Float>,
+    double);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerGetAllSpeakersNative
+    = Pointer<Pointer<Utf8>> Function(
+        Pointer<SherpaOnnxSpeakerEmbeddingManager>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerGetAllSpeakers
+    = SherpaOnnxSpeakerEmbeddingManagerGetAllSpeakersNative;
+
+typedef SherpaOnnxSpeakerEmbeddingManagerFreeAllSpeakersNative = Void Function(
+    Pointer<Pointer<Utf8>>);
+
+typedef SherpaOnnxSpeakerEmbeddingManagerFreeAllSpeakers = void Function(
+    Pointer<Pointer<Utf8>>);
+
+typedef SherpaOnnxCreateSpeakerEmbeddingExtractorNative
+    = Pointer<SherpaOnnxSpeakerEmbeddingExtractor> Function(
+        Pointer<SherpaOnnxSpeakerEmbeddingExtractorConfig>);
+
+typedef SherpaOnnxCreateSpeakerEmbeddingExtractor
+    = SherpaOnnxCreateSpeakerEmbeddingExtractorNative;
+
+typedef SherpaOnnxDestroySpeakerEmbeddingExtractorNative = Void Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingExtractor>);
+
+typedef SherpaOnnxDestroySpeakerEmbeddingExtractor = void Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingExtractor>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorDimNative = Int32 Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingExtractor>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorDim = int Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingExtractor>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorCreateStreamNative
+    = Pointer<SherpaOnnxOnlineStream> Function(
+        Pointer<SherpaOnnxSpeakerEmbeddingExtractor>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorCreateStream
+    = SherpaOnnxSpeakerEmbeddingExtractorCreateStreamNative;
+
+typedef DestroyOnlineStreamNative = Void Function(
+    Pointer<SherpaOnnxOnlineStream>);
+
+typedef DestroyOnlineStream = void Function(Pointer<SherpaOnnxOnlineStream>);
+
+typedef OnlineStreamAcceptWaveformNative = Void Function(
+    Pointer<SherpaOnnxOnlineStream>,
+    Int32 sample_rate,
+    Pointer<Float>,
+    Int32 n);
+
+typedef OnlineStreamAcceptWaveform = void Function(
+    Pointer<SherpaOnnxOnlineStream>, int sample_rate, Pointer<Float>, int n);
+
+typedef OnlineStreamInputFinishedNative = Void Function(
+    Pointer<SherpaOnnxOnlineStream>);
+
+typedef OnlineStreamInputFinished = void Function(
+    Pointer<SherpaOnnxOnlineStream>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorIsReadyNative = Int32 Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingExtractor>,
+    Pointer<SherpaOnnxOnlineStream>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorIsReady = int Function(
+    Pointer<SherpaOnnxSpeakerEmbeddingExtractor>,
+    Pointer<SherpaOnnxOnlineStream>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorComputeEmbeddingNative
+    = Pointer<Float> Function(Pointer<SherpaOnnxSpeakerEmbeddingExtractor>,
+        Pointer<SherpaOnnxOnlineStream>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorComputeEmbedding
+    = SherpaOnnxSpeakerEmbeddingExtractorComputeEmbeddingNative;
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorDestroyEmbeddingNative = Void
+    Function(Pointer<Float>);
+
+typedef SherpaOnnxSpeakerEmbeddingExtractorDestroyEmbedding = void Function(
+    Pointer<Float>);
+
+typedef SherpaOnnxReadWaveNative = Pointer<SherpaOnnxWave> Function(
+    Pointer<Utf8>);
+
+typedef SherpaOnnxReadWave = SherpaOnnxReadWaveNative;
+
+typedef SherpaOnnxFreeWaveNative = Void Function(Pointer<SherpaOnnxWave>);
+
+typedef SherpaOnnxFreeWave = void Function(Pointer<SherpaOnnxWave>);
+
+class SherpaOnnxBindings {
+  static SherpaOnnxCreateSpeakerEmbeddingExtractor?
+      createSpeakerEmbeddingExtractor;
+
+  static SherpaOnnxDestroySpeakerEmbeddingExtractor?
+      destroySpeakerEmbeddingExtractor;
+
+  static SherpaOnnxSpeakerEmbeddingExtractorDim? speakerEmbeddingExtractorDim;
+
+  static SherpaOnnxSpeakerEmbeddingExtractorCreateStream?
+      speakerEmbeddingExtractorCreateStream;
+
+  static SherpaOnnxSpeakerEmbeddingExtractorComputeEmbedding?
+      speakerEmbeddingExtractorComputeEmbedding;
+
+  static SherpaOnnxSpeakerEmbeddingExtractorDestroyEmbedding?
+      speakerEmbeddingExtractorDestroyEmbedding;
+
+  static DestroyOnlineStream? destroyOnlineStream;
+
+  static OnlineStreamAcceptWaveform? onlineStreamAcceptWaveform;
+
+  static OnlineStreamInputFinished? onlineStreamInputFinished;
+
+  static SherpaOnnxSpeakerEmbeddingExtractorIsReady?
+      speakerEmbeddingExtractorIsReady;
+
+  static SherpaOnnxCreateSpeakerEmbeddingManager? createSpeakerEmbeddingManager;
+
+  static SherpaOnnxDestroySpeakerEmbeddingManager?
+      destroySpeakerEmbeddingManager;
+
+  static SherpaOnnxSpeakerEmbeddingManagerAdd? speakerEmbeddingManagerAdd;
+
+  static SherpaOnnxSpeakerEmbeddingManagerAddListFlattened?
+      speakerEmbeddingManagerAddListFlattened;
+
+  static SherpaOnnxSpeakerEmbeddingManagerRemove? speakerEmbeddingManagerRemove;
+
+  static SherpaOnnxSpeakerEmbeddingManagerContains?
+      speakerEmbeddingManagerContains;
+
+  static SherpaOnnxSpeakerEmbeddingManagerSearch? speakerEmbeddingManagerSearch;
+
+  static SherpaOnnxSpeakerEmbeddingManagerFreeSearch?
+      speakerEmbeddingManagerFreeSearch;
+
+  static SherpaOnnxSpeakerEmbeddingManagerNumSpeakers?
+      speakerEmbeddingManagerNumSpeakers;
+
+  static SherpaOnnxSpeakerEmbeddingManagerVerify? speakerEmbeddingManagerVerify;
+
+  static SherpaOnnxSpeakerEmbeddingManagerGetAllSpeakers?
+      speakerEmbeddingManagerGetAllSpeakers;
+
+  static SherpaOnnxSpeakerEmbeddingManagerFreeAllSpeakers?
+      speakerEmbeddingManagerFreeAllSpeakers;
+
+  static SherpaOnnxReadWave? readWave;
+
+  static SherpaOnnxFreeWave? freeWave;
+
+  static void init(DynamicLibrary dynamicLibrary) {
+    createSpeakerEmbeddingExtractor ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxCreateSpeakerEmbeddingExtractor>>(
+            'SherpaOnnxCreateSpeakerEmbeddingExtractor')
+        .asFunction();
+
+    destroySpeakerEmbeddingExtractor ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxDestroySpeakerEmbeddingExtractorNative>>(
+            'SherpaOnnxDestroySpeakerEmbeddingExtractor')
+        .asFunction();
+
+    speakerEmbeddingExtractorDim ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxSpeakerEmbeddingExtractorDimNative>>(
+            'SherpaOnnxSpeakerEmbeddingExtractorDim')
+        .asFunction();
+
+    speakerEmbeddingExtractorCreateStream ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingExtractorCreateStreamNative>>(
+            'SherpaOnnxSpeakerEmbeddingExtractorCreateStream')
+        .asFunction();
+
+    speakerEmbeddingExtractorComputeEmbedding ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingExtractorComputeEmbeddingNative>>(
+            'SherpaOnnxSpeakerEmbeddingExtractorComputeEmbedding')
+        .asFunction();
+
+    speakerEmbeddingExtractorDestroyEmbedding ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingExtractorDestroyEmbeddingNative>>(
+            'SherpaOnnxSpeakerEmbeddingExtractorDestroyEmbedding')
+        .asFunction();
+
+    destroyOnlineStream ??= dynamicLibrary
+        .lookup<NativeFunction<DestroyOnlineStreamNative>>(
+            'DestroyOnlineStream')
+        .asFunction();
+
+    onlineStreamAcceptWaveform ??= dynamicLibrary
+        .lookup<NativeFunction<OnlineStreamAcceptWaveformNative>>(
+            'AcceptWaveform')
+        .asFunction();
+
+    onlineStreamInputFinished ??= dynamicLibrary
+        .lookup<NativeFunction<OnlineStreamInputFinishedNative>>(
+            'InputFinished')
+        .asFunction();
+
+    speakerEmbeddingExtractorIsReady ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingExtractorIsReadyNative>>(
+            'SherpaOnnxSpeakerEmbeddingExtractorIsReady')
+        .asFunction();
+
+    createSpeakerEmbeddingManager ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxCreateSpeakerEmbeddingManagerNative>>(
+            'SherpaOnnxCreateSpeakerEmbeddingManager')
+        .asFunction();
+
+    destroySpeakerEmbeddingManager ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxDestroySpeakerEmbeddingManagerNative>>(
+            'SherpaOnnxDestroySpeakerEmbeddingManager')
+        .asFunction();
+
+    speakerEmbeddingManagerAdd ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxSpeakerEmbeddingManagerAddNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerAdd')
+        .asFunction();
+
+    speakerEmbeddingManagerAddListFlattened ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingManagerAddListFlattenedNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerAddListFlattened')
+        .asFunction();
+
+    speakerEmbeddingManagerRemove ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxSpeakerEmbeddingManagerRemoveNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerRemove')
+        .asFunction();
+
+    speakerEmbeddingManagerContains ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingManagerContainsNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerContains')
+        .asFunction();
+
+    speakerEmbeddingManagerSearch ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxSpeakerEmbeddingManagerSearchNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerSearch')
+        .asFunction();
+
+    speakerEmbeddingManagerFreeSearch ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingManagerFreeSearchNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerFreeSearch')
+        .asFunction();
+
+    speakerEmbeddingManagerNumSpeakers ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingManagerNumSpeakersNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerNumSpeakers')
+        .asFunction();
+
+    speakerEmbeddingManagerVerify ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxSpeakerEmbeddingManagerVerifyNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerVerify')
+        .asFunction();
+
+    speakerEmbeddingManagerGetAllSpeakers ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingManagerGetAllSpeakersNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerGetAllSpeakers')
+        .asFunction();
+
+    speakerEmbeddingManagerFreeAllSpeakers ??= dynamicLibrary
+        .lookup<
+                NativeFunction<
+                    SherpaOnnxSpeakerEmbeddingManagerFreeAllSpeakersNative>>(
+            'SherpaOnnxSpeakerEmbeddingManagerFreeAllSpeakers')
+        .asFunction();
+
+    readWave ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxReadWaveNative>>('SherpaOnnxReadWave')
+        .asFunction();
+
+    freeWave ??= dynamicLibrary
+        .lookup<NativeFunction<SherpaOnnxFreeWaveNative>>('SherpaOnnxFreeWave')
+        .asFunction();
+  }
+}

+// Copyright (c)  2024  Xiaomi Corporation
+import 'dart:ffi';
+import 'dart:typed_data';
+import 'package:ffi/ffi.dart';
+import "./sherpa_onnx_bindings.dart";
+import "./online_stream.dart";
+
+class SpeakerEmbeddingExtractorConfig {
+  const SpeakerEmbeddingExtractorConfig(
+      {required this.model,
+      this.numThreads = 1,
+      this.debug = true,
+      this.provider = "cpu"});
+
+  @override
+  String toString() {
+    return "SpeakerEmbeddingExtractorConfig(model: $model, numThreads: $numThreads, debug: $debug, provider: $provider)";
+  }
+
+  final String model;
+  final int numThreads;
+  final bool debug;
+  final String provider;
+}
+
+class SpeakerEmbeddingExtractor {
+  SpeakerEmbeddingExtractor._({required this.ptr, required this.dim});
+
+  /// The user is responsible to call the SpeakerEmbeddingExtractor.free()
+  /// method of the returned instance to avoid memory leak.
+  factory SpeakerEmbeddingExtractor(
+      {required SpeakerEmbeddingExtractorConfig config}) {
+    final c = calloc<SherpaOnnxSpeakerEmbeddingExtractorConfig>();
+
+    final modelPtr = config.model.toNativeUtf8();
+    c.ref.model = modelPtr;
+
+    c.ref.numThreads = config.numThreads;
+    c.ref.debug = config.debug ? 1 : 0;
+
+    final providerPtr = config.provider.toNativeUtf8();
+    c.ref.provider = providerPtr;
+
+    final ptr =
+        SherpaOnnxBindings.createSpeakerEmbeddingExtractor?.call(c) ?? nullptr;
+
+    calloc.free(providerPtr);
+    calloc.free(modelPtr);
+    calloc.free(c);
+
+    final dim = SherpaOnnxBindings.speakerEmbeddingExtractorDim?.call(ptr) ?? 0;
+
+    return SpeakerEmbeddingExtractor._(ptr: ptr, dim: dim);
+  }
+
+  void free() {
+    SherpaOnnxBindings.destroySpeakerEmbeddingExtractor?.call(ptr);
+    ptr = nullptr;
+  }
+
+  /// The user has to invoke stream.free() on the returned instance
+  /// to avoid memory leak
+  OnlineStream createStream() {
+    final p =
+        SherpaOnnxBindings.speakerEmbeddingExtractorCreateStream?.call(ptr) ??
+            nullptr;
+
+    return OnlineStream(ptr: p);
+  }
+
+  bool isReady(OnlineStream stream) {
+    final int ready = SherpaOnnxBindings.speakerEmbeddingExtractorIsReady
+            ?.call(this.ptr, stream.ptr) ??
+        0;
+    return ready == 1;
+  }
+
+  Float32List compute(OnlineStream stream) {
+    final Pointer<Float> embedding = SherpaOnnxBindings
+            .speakerEmbeddingExtractorComputeEmbedding
+            ?.call(this.ptr, stream.ptr) ??
+        nullptr;
+
+    if (embedding == nullptr) {
+      return Float32List(0);
+    }
+
+    final embeddingList = embedding.asTypedList(this.dim);
+    final ans = Float32List(this.dim);
+    ans.setAll(0, embeddingList);
+
+    SherpaOnnxBindings.speakerEmbeddingExtractorDestroyEmbedding
+        ?.call(embedding);
+
+    return ans;
+  }
+
+  Pointer<SherpaOnnxSpeakerEmbeddingExtractor> ptr;
+  final int dim;
+}
+
+class SpeakerEmbeddingManager {
+  SpeakerEmbeddingManager._({required this.ptr, required this.dim});
+
+  // The user has to use SpeakerEmbeddingManager.free() to avoid memory leak
+  factory SpeakerEmbeddingManager(int dim) {
+    final p =
+        SherpaOnnxBindings.createSpeakerEmbeddingManager?.call(dim) ?? nullptr;
+    return SpeakerEmbeddingManager._(ptr: p, dim: dim);
+  }
+
+  void free() {
+    SherpaOnnxBindings.destroySpeakerEmbeddingManager?.call(this.ptr);
+    this.ptr = nullptr;
+  }
+
+  /// Return true if added successfully; return false otherwise
+  bool add({required String name, required Float32List embedding}) {
+    assert(embedding.length == this.dim, "${embedding.length} vs ${this.dim}");
+
+    final Pointer<Utf8> namePtr = name.toNativeUtf8();
+    final int n = embedding.length;
+
+    final Pointer<Float> p = calloc<Float>(n);
+    final pList = p.asTypedList(n);
+    pList.setAll(0, embedding);
+
+    final int ok = SherpaOnnxBindings.speakerEmbeddingManagerAdd
+            ?.call(this.ptr, namePtr, p) ??
+        0;
+
+    calloc.free(p);
+    calloc.free(namePtr);
+
+    return ok == 1;
+  }
+
+  bool addMulti(
+      {required String name, required List<Float32List> embeddingList}) {
+    final Pointer<Utf8> namePtr = name.toNativeUtf8();
+    final int n = embeddingList.length;
+
+    final Pointer<Float> p = calloc<Float>(n * this.dim);
+    final pList = p.asTypedList(n * this.dim);
+
+    int offset = 0;
+    for (final e in embeddingList) {
+      assert(e.length == this.dim, "${e.length} vs ${this.dim}");
+
+      pList.setAll(offset, e);
+      offset += this.dim;
+    }
+
+    final int ok = SherpaOnnxBindings.speakerEmbeddingManagerAddListFlattened
+            ?.call(this.ptr, namePtr, p, n) ??
+        0;
+
+    calloc.free(p);
+    calloc.free(namePtr);
+
+    return ok == 1;
+  }
+
+  bool contains(String name) {
+    final Pointer<Utf8> namePtr = name.toNativeUtf8();
+
+    final int found = SherpaOnnxBindings.speakerEmbeddingManagerContains
+            ?.call(this.ptr, namePtr) ??
+        0;
+
+    calloc.free(namePtr);
+
+    return found == 1;
+  }
+
+  bool remove(String name) {
+    final Pointer<Utf8> namePtr = name.toNativeUtf8();
+
+    final int ok = SherpaOnnxBindings.speakerEmbeddingManagerRemove
+            ?.call(this.ptr, namePtr) ??
+        0;
+
+    calloc.free(namePtr);
+
+    return ok == 1;
+  }
+
+  /// Return an empty string if no speaker is found
+  String search({required Float32List embedding, required double threshold}) {
+    assert(embedding.length == this.dim);
+
+    final Pointer<Float> p = calloc<Float>(this.dim);
+    final pList = p.asTypedList(this.dim);
+    pList.setAll(0, embedding);
+
+    final Pointer<Utf8> name = SherpaOnnxBindings.speakerEmbeddingManagerSearch
+            ?.call(this.ptr, p, threshold) ??
+        nullptr;
+
+    calloc.free(p);
+
+    if (name == nullptr) {
+      return '';
+    }
+
+    final String ans = name.toDartString();
+
+    SherpaOnnxBindings.speakerEmbeddingManagerFreeSearch?.call(name);
+
+    return ans;
+  }
+
+  bool verify(
+      {required String name,
+      required Float32List embedding,
+      required double threshold}) {
+    assert(embedding.length == this.dim);
+
+    final Pointer<Utf8> namePtr = name.toNativeUtf8();
+
+    final Pointer<Float> p = calloc<Float>(this.dim);
+    final pList = p.asTypedList(this.dim);
+    pList.setAll(0, embedding);
+
+    final int ok = SherpaOnnxBindings.speakerEmbeddingManagerVerify
+            ?.call(this.ptr, namePtr, p, threshold) ??
+        0;
+
+    calloc.free(p);
+    calloc.free(namePtr);
+
+    return ok == 1;
+  }
+
+  int get numSpeakers =>
+      SherpaOnnxBindings.speakerEmbeddingManagerNumSpeakers?.call(this.ptr) ??
+      0;
+
+  List<String> get allSpeakerNames {
+    int n = this.numSpeakers;
+    if (n == 0) {
+      return <String>[];
+    }
+
+    final Pointer<Pointer<Utf8>> names = SherpaOnnxBindings
+            .speakerEmbeddingManagerGetAllSpeakers
+            ?.call(this.ptr) ??
+        nullptr;
+
+    if (names == nullptr) {
+      return <String>[];
+    }
+
+    final ans = <String>[];
+
+    // see https://api.flutter.dev/flutter/dart-ffi/PointerPointer.html
+    for (int i = 0; i != n; ++i) {
+      String name = names[i].toDartString();
+      ans.add(name);
+    }
+
+    SherpaOnnxBindings.speakerEmbeddingManagerFreeAllSpeakers?.call(names);
+
+    return ans;
+  }
+
+  Pointer<SherpaOnnxSpeakerEmbeddingManager> ptr;
+  final int dim;
+}

+// Copyright (c)  2024  Xiaomi Corporation
+import 'dart:ffi';
+import 'dart:typed_data';
+import 'package:ffi/ffi.dart';
+import "./sherpa_onnx_bindings.dart";
+
+class WaveData {
+  WaveData({required this.samples, required this.sampleRate});
+
+  /// normalized to [-1, 1]
+  Float32List samples;
+  int sampleRate;
+}
+
+WaveData readWave(String filename) {
+  final Pointer<Utf8> str = filename.toNativeUtf8();
+  Pointer<SherpaOnnxWave> wave =
+      SherpaOnnxBindings.readWave?.call(str) ?? nullptr;
+  calloc.free(str);
+
+  if (wave == nullptr) {
+    return WaveData(samples: Float32List(0), sampleRate: 0);
+  }
+
+  final samples = wave.ref.samples.asTypedList(wave.ref.numSamples);
+
+  final newSamples = Float32List.fromList(samples);
+  int sampleRate = wave.ref.sampleRate;
+  SherpaOnnxBindings.freeWave?.call(wave);
+
+  return WaveData(samples: newSamples, sampleRate: sampleRate);
+}

+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint hello.podspec` to validate before publishing.
+#
+Pod::Spec.new do |s|
+  s.name             = 'sherpa_onnx'
+  s.version          = '0.0.1'
+  s.summary          = 'sherpa-onnx Flutter FFI plugin project.'
+  s.description      = <<-DESC
+sherpa-onnx Flutter FFI plugin project.
+                       DESC
+  s.homepage         = 'https://github.com/k2-fsa/sherpa-onnx'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Your Company' => 'email@example.com' }
+
+  # This will ensure the source files in Classes/ are included in the native
+  # builds of apps using this FFI plugin. Podspec does not support relative
+  # paths, so Classes contains a forwarder C file that relatively imports
+  # `../src/*` so that the C sources can be shared among all target platforms.
+  s.source           = { :path => '.' }
+  s.dependency 'FlutterMacOS'
+  s.vendored_libraries = '*.dylib'
+
+  s.platform = :osx, '10.11'
+  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES' }
+  s.swift_version = '5.0'
+end

+# Usage
+
+## macOS
+
+1. Build required libraries
+
+```bash
+git clone https://github.com/k2-fsa/sherpa-onnx
+cd sherpa-onnx
+mkdir build
+cd build
+
+cmake -DCMAKE_INSTALL_PREFIX=./install -DBUILD_SHARED_LIBS=ON -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" ..
+make install
+cd ../sherpa-onnx/flutter/
+cp -v  ../../build/install/lib/lib* ./macos/
+```
+
+2. Test for speaker identification
+
+```bash
+cd sherpa-onnx/sherpa-onnx/flutter/example
+mkdir assets
+```
+
+
+## Useful commands
+```
+flutter pub publish --dry-run
+flutter run -d macos
+flutter run -d linux
+flutter run -d windows
+
+flutter build macos
+
+flutter run --release -d macos
+
+# add platform to an existing project
+flutter create --platforms=windows,macos,linux .
+
+dart analyze
+```

+name: sherpa_onnx
+description: >
+  Dart bindings for sherpa-onnx.
+repository: https://github.com/k2-fsa/sherpa-onnx/tree/main/sherpa-onnx/flutter
+topics:
+  - speech-to-text
+  - text-to-speech
+  - speaker-identification
+  - spoken-language-identification
+  - audio-tagging
+  - voice-activity-detection
+
+# remember to change the version in macos/sherpa_onnx.podspec
+version: 0.0.1
+homepage: https://github.com/k2-fsa/sherpa-onnx
+
+environment:
+  sdk: '>=3.4.0 <4.0.0'
+  flutter: '>=3.3.0'
+
+dependencies:
+  ffi: ^2.1.0
+  flutter:
+    sdk: flutter
+  plugin_platform_interface: ^2.0.2
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^3.0.0
+
+# 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 packages.
+flutter:
+  # This section identifies this Flutter project as a plugin project.
+  # The 'pluginClass' specifies the class (in Java, Kotlin, Swift, Objective-C, etc.)
+  # which should be registered in the plugin registry. This is required for
+  # using method channels.
+  # The Android 'package' specifies package in which the registered class is.
+  # This is required for using method channels on Android.
+  # The 'ffiPlugin' specifies that native code should be built and bundled.
+  # This is required for using `dart:ffi`.
+  # All these are used by the tooling to maintain consistency when
+  # adding or updating assets for this project.
+  #
+  # Please refer to README.md for a detailed explanation.
+  plugin:
+    platforms:
+      macos:
+        ffiPlugin: true
+
+  # To add assets to your plugin package, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+  #
+  # For details regarding assets in packages, see
+  # https://flutter.dev/assets-and-images/#from-packages
+  #
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware
+
+  # To add custom fonts to your plugin package, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts in packages, see
+  # https://flutter.dev/custom-fonts/#from-packages