Add Stop note function

android/src/main/AndroidManifest.xml

@@ -1,3 +1,2 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="me.teplyakov.midiplayer">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="me.teplyakov.midiplayer">
 </manifest>

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

@@ -22,6 +22,10 @@ extern "C" JNIEXPORT void JNICALL Java_me_teplyakov_midiplayer_MidiPlayerPlugin_
     fluid_synth_noteon(synthSingleton, 0, note, velocity);
 }
 
+extern "C" JNIEXPORT void JNICALL Java_me_teplyakov_midiplayer_MidiPlayerPlugin_fluidsynthStopNote(JNIEnv* env, jobject, jint note, jint velocity) {
+    fluid_synth_noteoff(synthSingleton, 0, note);
+}
+
 extern "C" JNIEXPORT void JNICALL Java_me_teplyakov_midiplayer_MidiPlayerPlugin_fluidsynthUnload(JNIEnv* env, jobject) {
     // Clean up
     delete_fluid_audio_driver(adriverSingleton);

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

@@ -20,6 +20,9 @@ class MidiPlayerPlugin: FlutterPlugin, MethodCallHandler {
 
       @JvmStatic
       private external fun fluidsynthPlayNote(note: Int, velocity: Int)
+
+      @JvmStatic
+      private external fun fluidsynthStopNote(note: Int)
 
       @JvmStatic
       private external fun fluidsynthUnload()
@@ -49,6 +52,12 @@ class MidiPlayerPlugin: FlutterPlugin, MethodCallHandler {
       if (note != null && velocity != null) {
         fluidsynthPlayNote(note, velocity)
       }
+    } else if (call.method == "stop_note") {
+      val args = call.arguments() as? Map<String, Any?>
+      val note = args?.get("note") as? Int
+      if (note != null) {
+        fluidsynthStopNote(note)
+      }
     } else if (call.method == "dispose") {
       fluidsynthUnload()
     } else {

ios/Classes/SwiftMidiPlayerPlugin.swift

@@ -27,6 +27,13 @@ public class SwiftMidiPlayerPlugin: NSObject, FlutterPlugin {
             let message = "Playing: \(String(describing: note))"
             result(message)
         }
+      case "stop_note":
+        if let args = call.arguments as? Dictionary<String, Any>,
+          let note = args["note"] as? Int {
+            au.stopPitch(midi: note)
+            let message = "Stopped: \(String(describing: note))"
+            result(message)
+        }
       case "dispose":
         result("done")
       default:

lib/midi_player.dart

@@ -40,6 +40,15 @@ class MidiPlayer {
     );
   }
 
+  Future<void> stopNote({required int note}) {
+    return _channel.invokeMethod(
+      'stop_note',
+      {
+        'note': note,
+      },
+    );
+  }
+
   /// Dispose engine
   Future<void> dispose() {
     return _channel.invokeMethod('dispose');