不获取AudioListenerInterruptionEnd触发器

发布于 2024-09-24 21:48:09 字数 1167 浏览 2 评论 0原文

我对 OpenAl 和 MPMoviePlayerController 的组合有疑问。

我在 OpenAl 设置过程中注册了 AudioInterruptionLister。当我开始播放视频时，侦听器会收到 AudioListenerInterruptionStarts，但当电影结束时，我不会收到 AudioListenerInterruptionEnd 触发器。

// Register callback for audio interrupts
AudioSessionInitialize(NULL, NULL, &OpenALInterruptionListener, this);

监听器

void OpenALInterruptionListener(void *inClientData, UInt32 inInterruptionState) 
{
    OpenAL *oal = (OpenAL *) inClientData;

    if (inInterruptionState == kAudioSessionBeginInterruption) 
    {
        oal->MakeContextNull();
        AudioSessionSetActive(false);
    } 
    else if (inInterruptionState == kAudioSessionEndInterruption) 
    {
        AudioSessionSetActive(true);
       oal->MakeContextCurrent();
    }
}

到目前为止，我的解决方案是在开始电影之前使上下文无效，并在电影结束后将其设置为当前上下文。这导致了一个问题，如果用户通过触摸屏幕快速跳过电影，我会将上下文设置为当前上下文，并且稍微延迟一点，我会得到 AudioListenerInterruptionStart 触发器，该触发器将我的上下文再次设置为空。

在 iO 3.1 更高版本上，我可以设置 useApplicationAudioSession = NO，并且侦听器永远不会成为开始或结束触发器。但在低于 3.2 的 iOS 上，htis 选项不存在。

但我的主要问题是，为什么我从来没有得到 AudioListenerInterruptionEnd 触发器。

感谢您的帮助此致格奥尔格

原文

I have a problem with the combination of OpenAl and the MPMoviePlayerController.

I registered the AudioInterruptionLister in my OpenAl Setup process. When I start a video the listener receives the AudioListenerInterruptionStarts, but when the movie ends I do not receive the AudioListenerInterruptionEnd trigger.

// Register callback for audio interrupts
AudioSessionInitialize(NULL, NULL, &OpenALInterruptionListener, this);

The listener

void OpenALInterruptionListener(void *inClientData, UInt32 inInterruptionState) 
{
    OpenAL *oal = (OpenAL *) inClientData;

    if (inInterruptionState == kAudioSessionBeginInterruption) 
    {
        oal->MakeContextNull();
        AudioSessionSetActive(false);
    } 
    else if (inInterruptionState == kAudioSessionEndInterruption) 
    {
        AudioSessionSetActive(true);
       oal->MakeContextCurrent();
    }
}

My solution until now was to make the context invalid before starting the movie and make it current after movie ends. That leads to the problem, that if the user skips the movie very fast by touching the screen, I make the context current and a little bit delayed I get AudioListenerInterruptionStart trigger that sets my context to null again.

On iOs greater 3.1 I can set useApplicationAudioSession = NO and the listener does never becomes a start or end trigger. But on iOS lower than 3.2 htis option does not exists.

But my main question is, why does I never get the AudioListenerInterruptionEnd trigger.

Thanks for help
best regards
Georg

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