使用AudioPlayers和Future.wait同时播放声音效果列表时颤振崩溃

Question

我想创建一个表示执行声音效果的List<Future<void>>列表。

因此，我迭代了一个事件类型/格式的列表(即。(“剑”)和映射每一个音效播放执行。

我用随机数的毫秒(从30到100毫秒)将这些未来封装在一个Future.delayed中，只是为了在播放声音效果时有一个小的随机出现(在两个声音效果之间添加一个暂停)。

这些声音效果期货的列表然后由Future.wait调用，我期望这个列表将被解决，Future.delay可能会生效。

这是我的密码

 _playActionEventSounds() async {
    if (widget.log.isNotEmpty) {
      final lastRound = widget.log.map((e) => e.round).reduce(max);
      final lastActionEvents = widget.log.where((actionEvent) => actionEvent.round == lastRound);
      final List<Future<void>> eventSounds = lastActionEvents.map((actionEvent) async {
        if (actionEvent.format == "sword") {
          return Future.delayed(Duration(milliseconds: next(30, 100)), () => _soundPlayer.punch());
        }
        if (actionEvent.format == "damage") {
          return Future.delayed(Duration(milliseconds: next(30, 100)), () => _soundPlayer.pain());
        }
        return Future.value(null);
      }).toList();

      await Future.wait(eventSounds);
    }
  }

SoundPlayer类：

import 'package:audioplayers/audioplayers.dart';

class SoundPlayer {
  Future<void> punch() async {
    final player = AudioPlayer();
    player.setReleaseMode(ReleaseMode.stop);
    return await player.play(AssetSource("sounds/punch.wav"));
  }

  Future<void> pain() async {
    final player = AudioPlayer();
    player.setReleaseMode(ReleaseMode.stop);
    return await player.play(AssetSource("sounds/pain.wav"));
  }
}

我现在可以多次运行这个过程了。我确实听到声音像预期的那样出现了。但是在第四次执行之后，应用程序就崩溃了。

这是一个错误：

I/flutter (28346): Unexpected platform error: MediaPlayer error with what:MEDIA_ERROR_UNKNOWN {what:1} extra:MEDIA_ERROR_UNKNOWN {extra:-19}
E/MediaPlayerNative(28346): pause called in state 0, mPlayer(0xb400007a92646810)
E/MediaPlayerNative(28346): error (-38, 0)
E/MediaPlayerNative(28346): Attempt to call getDuration in wrong state: mPlayer=0xb400007a92646810, mCurrentState=0
E/MediaPlayerNative(28346): error (-38, 0)
E/MediaPlayerNative(28346): stop called in state 0, mPlayer(0xb400007a92646810)
E/MediaPlayerNative(28346): error (-38, 0)
E/MediaPlayerNative(28346): prepareAsync called in state 0, mPlayer(0xb400007a92646810)
D/AndroidRuntime(28346): Shutting down VM
E/AndroidRuntime(28346): FATAL EXCEPTION: main
E/AndroidRuntime(28346): Process: com.example.app, PID: 28346
E/AndroidRuntime(28346): java.lang.IllegalStateException
E/AndroidRuntime(28346):    at android.media.MediaPlayer._prepare(Native Method)
E/AndroidRuntime(28346):    at android.media.MediaPlayer.prepare(MediaPlayer.java:1313)
E/AndroidRuntime(28346):    at xyz.luan.audioplayers.player.MediaPlayerPlayer.prepare(MediaPlayerPlayer.kt:89)
E/AndroidRuntime(28346):    at xyz.luan.audioplayers.player.WrappedPlayer.stop(WrappedPlayer.kt:185)
E/AndroidRuntime(28346):    at xyz.luan.audioplayers.player.WrappedPlayer.onCompletion(WrappedPlayer.kt:248)
E/AndroidRuntime(28346):    at xyz.luan.audioplayers.player.MediaPlayerPlayer.createMediaPlayer$lambda-5$lambda-1(MediaPlayerPlayer.kt:17)
E/AndroidRuntime(28346):    at xyz.luan.audioplayers.player.MediaPlayerPlayer.$r8$lambda$3fK1i48Yert5dbg2Q8ZiB5tiKHg(Unknown Source:0)
E/AndroidRuntime(28346):    at xyz.luan.audioplayers.player.MediaPlayerPlayer$$ExternalSyntheticLambda1.onCompletion(Unknown Source:2)
E/AndroidRuntime(28346):    at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:3559)
E/AndroidRuntime(28346):    at android.os.Handler.dispatchMessage(Handler.java:106)
E/AndroidRuntime(28346):    at android.os.Looper.loopOnce(Looper.java:201)
E/AndroidRuntime(28346):    at android.os.Looper.loop(Looper.java:288)
E/AndroidRuntime(28346):    at android.app.ActivityThread.main(ActivityThread.java:7842)
E/AndroidRuntime(28346):    at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(28346):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
E/AndroidRuntime(28346):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
I/Process (28346): Sending signal. PID: 28346 SIG: 9
Lost connection to device.

我想由于重复执行，我在某种程度上搞砸了资源管理。因此，我想错误在一定程度上在于API的使用audioplayers.dart。

Answer 1

我不得不把ReleaseMode改为release。我所做的是使用stop将资源保存在内存中--我猜是这样--从而使内存混乱？