adding packages

2026-01-15 14:38:46 -08:00
parent ef86e3ab6a
commit 6869cf47e5
5253 changed files with 726695 additions and 34 deletions
@@ -0,0 +1,3 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="com.appleeducate.fluttermidi">
+</manifest>
@@ -0,0 +1,118 @@
+package com.appleeducate.fluttermidi;
+
+import android.content.Context;
+import cn.sherlock.com.sun.media.sound.SF2Soundbank;
+import cn.sherlock.com.sun.media.sound.SoftSynthesizer;
+import io.flutter.embedding.engine.plugins.FlutterPlugin;
+import io.flutter.plugin.common.MethodCall;
+import io.flutter.plugin.common.MethodChannel;
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
+import io.flutter.plugin.common.MethodChannel.Result;
+import io.flutter.plugin.common.PluginRegistry.Registrar;
+import io.flutter.plugin.common.BinaryMessenger;
+import java.io.File;
+import java.io.IOException;
+import jp.kshoji.javax.sound.midi.InvalidMidiDataException;
+import jp.kshoji.javax.sound.midi.MidiUnavailableException;
+import jp.kshoji.javax.sound.midi.Receiver;
+import jp.kshoji.javax.sound.midi.ShortMessage;
+
+/** FlutterMidiPlugin */
+public class FlutterMidiPlugin implements MethodCallHandler, FlutterPlugin {
+  private SoftSynthesizer synth;
+  private Receiver recv;
+  private MethodChannel methodChannel;
+  private Context applicationContext;
+
+  /** Plugin registration. */
+  @SuppressWarnings("deprecation")
+  public static void registerWith(Registrar registrar) {
+    final FlutterMidiPlugin instance = new FlutterMidiPlugin();
+    instance.onAttachedToEngine(registrar.context(), registrar.messenger());
+  }
+
+  @Override
+  public void onAttachedToEngine(FlutterPluginBinding binding) {
+    onAttachedToEngine(binding.getApplicationContext(), binding.getBinaryMessenger());
+  }
+
+  /*
+    "Also, note that the plugin should still contain the static registerWith() method 
+    to remain compatible with apps that don’t use the v2 Android embedding. 
+    (See Upgrading pre 1.12 Android projects for details.) The easiest thing to 
+    do (if possible) is move the logic from registerWith() into a private method that 
+    both registerWith() and onAttachedToEngine() can call. Either registerWith() or 
+    onAttachedToEngine() will be called, not both."
+
+    - https://flutter.dev/docs/development/packages-and-plugins/plugin-api-migration
+  */
+  private void onAttachedToEngine(Context applicationContext, BinaryMessenger messenger) {
+    methodChannel = new MethodChannel(messenger, "flutter_midi");
+    methodChannel.setMethodCallHandler(new FlutterMidiPlugin());
+  }
+
+  @Override
+  public void onDetachedFromEngine(FlutterPluginBinding binding) {
+    applicationContext = null;
+    methodChannel.setMethodCallHandler(null);
+    methodChannel = null;
+  }
+
+  @Override
+  public void onMethodCall(MethodCall call, Result result) {
+    if (call.method.equals("prepare_midi")) {
+      try {
+        String _path = call.argument("path");
+        File _file = new File(_path);
+        SF2Soundbank sf = new SF2Soundbank(_file);
+        synth = new SoftSynthesizer();
+        synth.open();
+        synth.loadAllInstruments(sf);
+        synth.getChannels()[0].programChange(0);
+        synth.getChannels()[1].programChange(1);
+        recv = synth.getReceiver();
+      } catch (IOException e) {
+        e.printStackTrace();
+      } catch (MidiUnavailableException e) {
+        e.printStackTrace();
+      }
+    } else if (call.method.equals("change_sound")) {
+      try {
+        String _path = call.argument("path");
+        File _file = new File(_path);
+        SF2Soundbank sf = new SF2Soundbank(_file);
+        synth = new SoftSynthesizer();
+        synth.open();
+        synth.loadAllInstruments(sf);
+        synth.getChannels()[0].programChange(0);
+        synth.getChannels()[1].programChange(1);
+        recv = synth.getReceiver();
+      } catch (IOException e) {
+        e.printStackTrace();
+      } catch (MidiUnavailableException e) {
+        e.printStackTrace();
+      }
+    } else if (call.method.equals("play_midi_note")) {
+      int _note = call.argument("note");
+      int _velocity = call.argument("velocity");
+      try {
+        ShortMessage msg = new ShortMessage();
+        msg.setMessage(ShortMessage.NOTE_ON, 0, _note, _velocity);
+        recv.send(msg, -1);
+      } catch (InvalidMidiDataException e) {
+        e.printStackTrace();
+      }
+    } else if (call.method.equals("stop_midi_note")) {
+      int _note = call.argument("note");
+      int _velocity = call.argument("velocity");
+      try {
+        ShortMessage msg = new ShortMessage();
+        msg.setMessage(ShortMessage.NOTE_OFF, 0, _note, _velocity);
+        recv.send(msg, -1);
+      } catch (InvalidMidiDataException e) {
+        e.printStackTrace();
+      }
+    } else {
+    }
+  }
+}