fix: Init error on hot restart about flutter_soloud HOT 3 CLOSED

import 'dart:developer' as dev;

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_soloud/flutter_soloud.dart';
import 'package:logging/logging.dart';

void main() async {
 Logger.root.level = kDebugMode ? Level.FINE : Level.INFO;
 Logger.root.onRecord.listen((record) {
   dev.log(
     record.message,
     time: record.time,
     level: record.level.value,
     name: record.loggerName,
     zone: record.zone,
     error: record.error,
     stackTrace: record.stackTrace,
   );
 });

 WidgetsFlutterBinding.ensureInitialized();

 runApp(const MyApp());
}

class MyApp extends StatefulWidget {
 const MyApp({super.key});

 @override
 State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
 late AudioSource sound;
 final impl = SoLoudImpl.instance;

 @override
 void dispose() {
   impl.dispose();
   super.dispose();
 }

 @override
 Widget build(BuildContext context) {
   return MaterialApp(
     themeMode: ThemeMode.dark,
     darkTheme: ThemeData.dark(useMaterial3: true),
     home: Scaffold(
       body: Center(
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
             OutlinedButton(
               onPressed: impl.init,
               child: const Text('init'),
             ),
             OutlinedButton(
               onPressed: impl.playBeep,
               child: const Text('beep'),
             ),
           ],
         ),
       ),
     ),
   );
 }
}

class SoLoudImpl {
 SoLoudImpl._() {
   try {
     /// You should fix this because the `init()` must be awaited
     player.init();
   } catch (e) {
     debugPrint(e.toString());
   }
 }

 static final SoLoudImpl instance = SoLoudImpl._();

 final player = SoLoud.instance;

 AudioSource? beep;

 Future<void> init() async {
   try {
     beep = await player.loadAsset('assets/audio/explosion.mp3');
   } catch (e) {
     debugPrint(e.toString());
   }
 }

 void dispose() {
   /// Instead of `disposeAllSources()` I would use `deinit()` which also disposes all sources
   // player.disposeAllSources();
   player.deinit();
 }

 void _play(AudioSource? source) {
   assert(source != null, 'AudioSource not initialized');
   if (source != null) {
     player.play(source);
   }
 }

 void playBeep() {
   _play(beep);
 }
}