如何妥善处理音频中断？ [英] How to properly handle audio interruptions?

问题描述

我已经创建使用的OpenAL音频播放和experienceing失去音频如果主页按钮越来越之前，音频设备pssed $ P $是越来越初始化的问题OpenGL的3D游戏。我试图挂钩到音频会话中断处理程序，但我的回调是永远不会获取调用。无论我是否最小化或最大化我的申请。我的OpenALInterruptionListener永远不会获取调用。

我在做什么错了？

  AudioSessionInitialize（NULL，NULL，OpenALInterriptionListener，这一点）;无效OpenALInterriptionListener（无效* inClientData，UInt32的inInterruptionState）
{
    OpenALDevice *设备=（OpenALDevice *）inClientData;    如果（inInterruptionState == kAudioSessionBeginInterruption）
    {
          alcSuspendContext（_context）;
          alcMakeContextCurrent（_context）;
          AudioSessionSetActive（假）;
    }
    否则，如果（inInterruptionState == kAudioSessionEndInterruption）
    {
          UInt32的sessionCategory = kAudioSessionCategory_AmbientSound;
          AudioSessionSetProperty（kAudioSessionProperty_AudioCategory，sizeof的（sessionCategory），放大器; sessionCategory）;
          AudioSessionSetActive（真）;
          alcMakeContextCurrent（_context）;
          alcProcessContext（_context）;
    }
}
 

解决方案

请注意，目前有带音频中断和IOS的问题。中断的通知都很好，但最终音频中断通知并不总是工作。有关于这个错误变成苹果和他们没有回应。

I've created a OpenGL 3D game utilizing OpenAL for audio playback and experienceing a problem of losing audio if "Home" button is getting pressed before audio device is getting initialized. I tried to hook up to audio session interrupt handler, but my callback is never getting called. No matter if I minimize or maximize my application. My "OpenALInterruptionListener" is never getting called.

What am I doing wrong?

AudioSessionInitialize(NULL, NULL, OpenALInterriptionListener, this);

void OpenALInterriptionListener(void * inClientData, UInt32 inInterruptionState)
{
    OpenALDevice * device = (OpenALDevice *) inClientData;

    if (inInterruptionState == kAudioSessionBeginInterruption)
    {
          alcSuspendContext(_context);
          alcMakeContextCurrent(_context);
          AudioSessionSetActive(false);
    }
    else if (inInterruptionState == kAudioSessionEndInterruption)
    {
          UInt32 sessionCategory = kAudioSessionCategory_AmbientSound;
          AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory), &sessionCategory);
          AudioSessionSetActive(true);    
          alcMakeContextCurrent(_context);
          alcProcessContext(_context);
    }
}

解决方案

Please note that there are currently issues with Audio Interruptions and IOS. Interruption notifications are fine, but end Audio Interruptions Notifications do not always work. There is a bug into Apple on this and they have not responded.

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