Support the platform iOS for Flutter (#1079)

flutter/notes.md

@@ -15,20 +15,26 @@ flutter create --template plugin sherpa_onnx
 flutter create --template plugin_ffi --platforms macos sherpa_onnx_macos
 ```
 
-3. Create `sherpa_onnx_linux
+3. Create `sherpa_onnx_linux`
 
 ```bash
 flutter create --template plugin_ffi --platforms linux sherpa_onnx_linux
 ```
 
-4. Create `sherpa_onnx_windows
+4. Create `sherpa_onnx_windows`
 
 ```bash
 flutter create --template plugin_ffi --platforms linux sherpa_onnx_windows
 ```
 
-5. Create `sherpa_onnx_android
+5. Create `sherpa_onnx_android`
 
 ```bash
 flutter create --template plugin_ffi --platforms android --org com.k2fsa.sherpa.onnx sherpa_onnx_android
 ```
+
+6. Create `sherpa_onnx_ios`
+
+```bash
+flutter create --template plugin_ffi --platforms ios sherpa_onnx_ios
+```

flutter/sherpa_onnx/lib/sherpa_onnx.dart

@@ -19,11 +19,9 @@ String? _path;
 
 // see also
 // https://github.com/flutter/codelabs/blob/main/ffigen_codelab/step_05/lib/ffigen_app.dart
+// https://api.flutter.dev/flutter/dart-io/Platform-class.html
 final DynamicLibrary _dylib = () {
-  if (Platform.isIOS) {
-    throw UnsupportedError('Unknown platform: ${Platform.operatingSystem}');
-  }
-  if (Platform.isMacOS) {
+  if (Platform.isMacOS || Platform.isIOS) {
     if (_path == null) {
       return DynamicLibrary.open('libsherpa-onnx-c-api.dylib');
     } else {

flutter/sherpa_onnx/pubspec.yaml

@@ -17,7 +17,7 @@ topics:
   - voice-activity-detection
 
 # remember to change the version in ../sherpa_onnx_macos/macos/sherpa_onnx_macos.podspec
-version: 1.10.10
+version: 1.10.11
 
 homepage: https://github.com/k2-fsa/sherpa-onnx
 
@@ -30,24 +30,31 @@ dependencies:
   flutter:
     sdk: flutter
 
-  sherpa_onnx_android: ^1.10.10
+  sherpa_onnx_android: ^1.10.11
     # path: ../sherpa_onnx_android
 
-  sherpa_onnx_macos: ^1.10.10
+  sherpa_onnx_macos: ^1.10.11
     # path: ../sherpa_onnx_macos
 
-  sherpa_onnx_linux: ^1.10.10
+  sherpa_onnx_linux: ^1.10.11
     # path: ../sherpa_onnx_linux
     #
-  sherpa_onnx_windows: ^1.10.10
+  sherpa_onnx_windows: ^1.10.11
     # path: ../sherpa_onnx_windows
 
+  sherpa_onnx_ios: ^1.10.11
+  # sherpa_onnx_ios:
+    # path: ../sherpa_onnx_ios
+
 flutter:
   plugin:
     platforms:
       android:
         default_package: sherpa_onnx_android
 
+      ios:
+        default_package: sherpa_onnx_ios
+
       macos:
         default_package: sherpa_onnx_macos
 

flutter/sherpa_onnx_ios/.gitignore

@@ -0,0 +1,29 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
+.dart_tool/
+build/

flutter/sherpa_onnx_ios/.metadata

@@ -0,0 +1,30 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "5dcb86f68f239346676ceb1ed1ea385bd215fba1"
+  channel: "stable"
+
+project_type: plugin_ffi
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+      base_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+    - platform: ios
+      create_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+      base_revision: 5dcb86f68f239346676ceb1ed1ea385bd215fba1
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

flutter/sherpa_onnx_ios/README.md

@@ -0,0 +1,7 @@
+# sherpa_onnx_linux
+
+This is a sub project of [sherpa-onnx](https://github.com/k2-fsa/sherpa-onnx).
+
+You are not expected to use this package directly.
+
+Please see the entry point at <https://pub.dev/packages/sherpa_onnx>.

flutter/sherpa_onnx_ios/analysis_options.yaml

@@ -0,0 +1,4 @@
+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

flutter/sherpa_onnx_ios/ios/sherpa_onnx_ios.podspec

@@ -0,0 +1,33 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint sherpa_onnx_ios.podspec` to validate before publishing.
+#
+# See also
+# https://github.com/google/webcrypto.dart/blob/2010361a106d7a872d90e3dfebfed250e2ede609/ios/webcrypto.podspec#L23-L28
+# https://groups.google.com/g/dart-ffi/c/nUATMBy7r0c
+Pod::Spec.new do |s|
+  s.name             = 'sherpa_onnx_ios'
+  s.version          = '1.10.11'
+  s.summary          = 'A new Flutter FFI plugin project.'
+  s.description      = <<-DESC
+A new Flutter FFI plugin project.
+                       DESC
+  s.homepage         = 'https://github.com/k2-fsa/sherpa-onnx'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Fangjun Kuang' => 'csukuangfj@gmail.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 'Flutter'
+  s.platform = :ios, '12.0'
+  s.ios.vendored_libraries = '*.dylib', '*.a'
+
+  # Flutter.framework does not contain a i386 slice.
+  s.pod_target_xcconfig = {
+    'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386'
+    }
+  s.swift_version = '5.0'
+end

flutter/sherpa_onnx_ios/lib/README.md

@@ -0,0 +1,3 @@
+# Introduction
+
+This directory is left empty intentionally.

flutter/sherpa_onnx_ios/pubspec.yaml

@@ -0,0 +1,36 @@
+name: sherpa_onnx_ios
+
+description: >
+  Speech recognition, speech synthesis, and speaker recognition using next-gen Kaldi
+  with onnxruntime without Internet connection.
+
+version: 0.0.1
+
+repository: https://github.com/k2-fsa/sherpa-onnx/tree/master/flutter
+
+issue_tracker: https://github.com/k2-fsa/sherpa-onnx/issues
+documentation: https://k2-fsa.github.io/sherpa/onnx/
+
+homepage: https://github.com/k2-fsa/sherpa-onnx
+
+topics:
+  - speech-recognition
+  - speech-synthesis
+  - speaker-identification
+  - audio-tagging
+  - voice-activity-detection
+
+environment:
+  sdk: '>=3.4.0 <4.0.0'
+  flutter: '>=3.3.0'
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+flutter:
+  plugin:
+    platforms:
+      ios:
+        ffiPlugin: true
+

flutter/sherpa_onnx_macos/macos/sherpa_onnx_macos.podspec

@@ -4,7 +4,7 @@
 #
 Pod::Spec.new do |s|
   s.name             = 'sherpa_onnx_macos'
-  s.version          = '1.10.7'
+  s.version          = '1.10.11'
   s.summary          = 'sherpa-onnx Flutter FFI plugin project.'
   s.description      = <<-DESC
 sherpa-onnx Flutter FFI plugin project.