migrate to flutter 3 and add velocity parameter

.gitignore

@@ -9,6 +9,7 @@
 .history
 .svn/
 .vscode
+.fvm
 
 # IntelliJ related
 *.iml

CHANGELOG.md

@@ -1,7 +1,12 @@
-## 0.1.0
+## 0.2.0
 
-* Initial release.
+* Flutter 3.0.0 support
+* velocity parameter for playing notes
 
 ## 0.1.1
 
-* Fix android ndk targets
+* Fix android ndk targets
+
+## 0.1.0
+
+* Initial release.

README.md

@@ -1,6 +1,6 @@
 # midi_player
 
-A Flutter Plugin to Play midi on iOS and Android uses SoundFont (.sf2) files.
+A Flutter plugin to play midi on iOS and Android uses SoundFont (.sf2) files.
 
 ## Important notes
 
@@ -18,13 +18,15 @@ assets:
 - Load the sound
 
 ``` ruby
-_midiPlayer.load('assets/FlorestanPiano.sf2');
+_midiPlayer.load('assets/Piano.sf2');
 ```
 
 - Play midi note
 
 ``` ruby
-_midiPlayer.playNote(60);
+_midiPlayer.playNote(note: 60);
+or
+_midiPlayer.playNote(note: 62, velocity: 0.5);
 ```
 
 - Dispose after usage

android/src/main/cpp/native-lib.cpp

@@ -18,8 +18,8 @@ extern "C" JNIEXPORT void JNICALL Java_me_teplyakov_midiplayer_MidiPlayerPlugin_
     fluid_synth_sfload(synthSingleton, soundfontPath, 1);
 }
 
-extern "C" JNIEXPORT void JNICALL Java_me_teplyakov_midiplayer_MidiPlayerPlugin_fluidsynthPlayNote(JNIEnv* env, jobject, jint note) {
-    fluid_synth_noteon(synthSingleton, 0, note, 127);
+extern "C" JNIEXPORT void JNICALL Java_me_teplyakov_midiplayer_MidiPlayerPlugin_fluidsynthPlayNote(JNIEnv* env, jobject, jint note, jint velocity) {
+    fluid_synth_noteon(synthSingleton, 0, note, velocity);
 }
 
 extern "C" JNIEXPORT void JNICALL Java_me_teplyakov_midiplayer_MidiPlayerPlugin_fluidsynthUnload(JNIEnv* env, jobject) {

android/src/main/kotlin/me/teplyakov/midiplayer/MidiPlayerPlugin.kt

@@ -19,7 +19,7 @@ class MidiPlayerPlugin: FlutterPlugin, MethodCallHandler {
       private external fun fluidsynthInit(path: String)
 
       @JvmStatic
-      private external fun fluidsynthPlayNote(note: Int)
+      private external fun fluidsynthPlayNote(note: Int, velocity: Int)
 
       @JvmStatic
       private external fun fluidsynthUnload()
@@ -38,10 +38,17 @@ class MidiPlayerPlugin: FlutterPlugin, MethodCallHandler {
 
   override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
     if (call.method == "load") {
-      val path = call.arguments() as String
-      fluidsynthInit(path)
+      val path = call.arguments() as? String
+      if (path != null) {
+        fluidsynthInit(path)
+      }
     } else if (call.method == "play_note") {
-      fluidsynthPlayNote(call.arguments() as Int)
+      val args = call.arguments() as? Map<String, Any?>
+      val note = args?.get("note") as? Int
+      val velocity = args?.get("velocity") as? Int
+      if (note != null && velocity != null) {
+        fluidsynthPlayNote(note, velocity)
+      }
     } else if (call.method == "dispose") {
       fluidsynthUnload()
     } else {

example/ios/Runner/Info.plist

@@ -43,5 +43,7 @@
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
 </dict>
 </plist>

example/lib/main.dart

@@ -32,7 +32,13 @@ class _MyAppState extends State<MyApp> {
             ),
             ElevatedButton(
               onPressed: () {
-                _midiPlayer.playNote(60);
+                _midiPlayer.playNote(note: 60);
+              },
+              child: const Text('Play'),
+            ),
+            ElevatedButton(
+              onPressed: () {
+                _midiPlayer.playNote(note: 62, velocity: 0.5);
               },
               child: const Text('Play'),
             ),

ios/Classes/AudioUnitMIDISynth.swift

@@ -71,7 +71,9 @@ class AudioUnitMIDISynth: NSObject {
             componentType: OSType(kAudioUnitType_Output),
             componentSubType: OSType(kAudioUnitSubType_RemoteIO),
             componentManufacturer: OSType(kAudioUnitManufacturer_Apple),
-            componentFlags: 0, componentFlagsMask: 0)
+            componentFlags: 0, 
+            componentFlagsMask: 0
+        )
         let status = AUGraphAddNode(self.processingGraph!, &cd, &ioNode)
         AudioUtils.CheckError(status)
     }
@@ -204,7 +206,7 @@ class AudioUnitMIDISynth: NSObject {
     }
 
     /// Send a note on message using patch2 on channel 0
-    func playPitch(midi: Int) {
+    func playPitch(midi: Int, velocity: Int) {
 
         let channel = UInt32(0)
         let noteCommand = UInt32(0x90 | channel)
@@ -213,7 +215,7 @@ class AudioUnitMIDISynth: NSObject {
 
         status = MusicDeviceMIDIEvent(self.midisynthUnit!, pcCommand, patch2, 0, 0)
         AudioUtils.CheckError(status)
-        status = MusicDeviceMIDIEvent(self.midisynthUnit!, noteCommand, UInt32(midi), 64, 0)
+        status = MusicDeviceMIDIEvent(self.midisynthUnit!, noteCommand, UInt32(midi), UInt32(velocity), 0)
         AudioUtils.CheckError(status)
     }
 

ios/Classes/SwiftMidiPlayerPlugin.swift

@@ -20,10 +20,13 @@ public class SwiftMidiPlayerPlugin: NSObject, FlutterPlugin {
         let message = "Prepared Sound Font"
         result(message)
       case "play_note":
-        let midi = call.arguments as? Int
-        au.playPitch(midi: midi ?? 60)
-        let message = "Playing: \(String(describing: midi!))"
-        result(message)
+        if let args = call.arguments as? Dictionary<String, Any>,
+          let note = args["note"] as? Int,
+          let velocity = args["velocity"] as? Int {
+            au.playPitch(midi: note, velocity: velocity)
+            let message = "Playing: \(String(describing: note))"
+            result(message)
+        }
       case "dispose":
         result("done")
       default:

lib/midi_player.dart

@@ -7,6 +7,7 @@ import 'package:path_provider/path_provider.dart';
 class MidiPlayer {
   static const MethodChannel _channel = MethodChannel('midi_player');
 
+  /// Init engine with specific .sf2 file
   Future<void> load(String path) async {
     const tmpPath = "temporay_font.sf2";
 
@@ -22,10 +23,24 @@ class MidiPlayer {
     return _channel.invokeMethod('load', file.path);
   }
 
-  Future<void> playNote(int note) {
-    return _channel.invokeMethod('play_note', note);
+  /// Play the note wirh specific velocity.
+  /// velocity should be between 0.0 and 1.0
+  /// if velocity is omitted maximum value is used
+  Future<void> playNote({
+    required int note,
+    double? velocity,
+  }) {
+    final normalizedVelocity = 127.0 * (velocity ?? 1.0);
+    return _channel.invokeMethod(
+      'play_note',
+      {
+        'note': note,
+        'velocity': normalizedVelocity.toInt(),
+      },
+    );
   }
 
+  /// Dispose engine
   Future<void> dispose() {
     return _channel.invokeMethod('dispose');
   }

pubspec.yaml

@@ -1,11 +1,11 @@
 name: midi_player
-description: Flutter plugin for playing midi files
-version: 0.1.1
+description: A Flutter plugin to play midi on iOS and Android uses SoundFont (.sf2) files
+version: 0.2.0
 homepage: https://github.com/tplkn/midi_player
 
 environment:
-  sdk: ">=2.16.1 <3.0.0"
-  flutter: ">=2.5.0"
+  sdk: ">=2.17.0 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter: