音频缓冲区上的 java.lang.OutOfMemoryError

Question

我目前正在尝试创建一个 Android 应用程序，将音频从麦克风循环到耳机，我可以完美地做到这一点，但是当我在应用程序中一遍又一遍地执行此操作时，我最终会出现内存不足错误。

<小时/>

这是我用来创建音频循环的代码:

static final int bufferSize = 200000;
    final short[] buffer = new short[bufferSize];
    short[] readBuffer = new short[bufferSize];

    public void run() {  
      isRecording = true;
      android.os.Process.setThreadPriority
      (android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);

      int buffersize = AudioRecord.getMinBufferSize(11025,
      AudioFormat.CHANNEL_CONFIGURATION_MONO,
      AudioFormat.ENCODING_PCM_16BIT);


                     arec = new AudioRecord(MediaRecorder.AudioSource.MIC,
                                     11025,
                                     AudioFormat.CHANNEL_CONFIGURATION_MONO,
                                     MediaRecorder.AudioEncoder.AMR_NB,
                                     buffersize);
                     atrack = new AudioTrack(AudioManager.STREAM_VOICE_CALL,
                                     11025,
                                     AudioFormat.CHANNEL_CONFIGURATION_MONO,
                                     MediaRecorder.AudioEncoder.AMR_NB,
                                     buffersize,
                                     AudioTrack.MODE_STREAM);

                     Log.d("AUDIO", "sample rate = : " + arec.getSampleRate());

                     atrack.setPlaybackRate(11025);

                     byte[] buffer = new byte[buffersize];
                     arec.startRecording();
                     atrack.play();

                     while(isRecording) {
                             arec.read(buffer, 0, buffersize);
                             atrack.write(buffer, 0, buffer.length);
                     }  

    }

<小时/>

这是我得到的错误:

ERROR/AndroidRuntime(3442): Uncaught handler: thread main exiting due to uncaught exception
ERROR/AndroidRuntime(3442): java.lang.OutOfMemoryError
ERROR/AndroidRuntime(3442):     at com.phone.engine.CallAudio$Record.<init>(CallAudio.java:114)
ERROR/AndroidRuntime(3442):     at com.phone.engine.CallAudio.onCreate(CallAudio.java:42)
ERROR/AndroidRuntime(3442):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2465)
ERROR/AndroidRuntime(3442):     at android.app.ActivityThread.access$2800(ActivityThread.java:112)
ERROR/AndroidRuntime(3442):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1744)
ERROR/AndroidRuntime(3442):     at android.os.Handler.dispatchMessage(Handler.java:99)
ERROR/AndroidRuntime(3442):     at android.os.Looper.loop(Looper.java:123)
ERROR/AndroidRuntime(3442):     at android.app.ActivityThread.main(ActivityThread.java:3948)
ERROR/AndroidRuntime(3442):     at java.lang.reflect.Method.invokeNative(Native Method)
ERROR/AndroidRuntime(3442):     at java.lang.reflect.Method.invoke(Method.java:521)
ERROR/AndroidRuntime(3442):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
ERROR/AndroidRuntime(3442):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
ERROR/AndroidRuntime(3442):     at dalvik.system.NativeStart.main(Native Method)

<小时/>

所以错误特别集中在代码中的这一行

short[] readBuffer = new short[bufferSize];

它发生在我尝试执行循环几次之后，所以假设我启动应用程序，并且在启动循环 10 次后我收到错误。

所以我认为缓冲区只是变满了还是什么？那是对的吗？如果是这样，我将如何继续清除缓冲区？

提前致谢

Answer 1

According to the API docs ，您必须停止录制并释放实例。否则，它会占用系统资源，你最终会用完。因此，添加必要的清理代码，它应该可以工作。