在 WP7 中按下设备后退键后麦克风缓冲区变为 0

发布于 2024-10-20 06:24:16 字数 690 浏览 1 评论 0原文

我有一个麦克风对象来录制声音。如果我位于同一个 xaml 文件上,我的字节缓冲区数组会给出正确的结果。

但是一旦我按下后退键并再次来到同一页面,缓冲区的每个数组成员中都包含 0。

在构造函数中,我有以下代码:

this.microphone.GetData(buffer);

在按钮单击处理程序中,我有以下代码:

// Stop previously running microphone
if (this.microphone.State == MicrophoneState.Started)
{
    this.microphone.Stop();
}

// Clear previous content of microphone

this.microphone.BufferDuration = TimeSpan.FromMilliseconds(1000);

this.microphone.Start();

// Store recorded audio
 this.buffer = new byte[this.microphone.GetSampleSizeInBytes(this.microphone.BufferDuration)];

使用麦克风类有什么问题吗?按下设备后退按钮后它会被清除还是会发生什么?

提前致谢。如果问题有任何疑问,请告诉我。

i have a microphone object to record sound. My byte buffer array gives me correct result if i am on the same xaml file.

But once i press the back key and come to same page again, the buffer contains 0 in every array member.

In constructor, i have the following code:

this.microphone.GetData(buffer);

In a button click handler, i have the following code:

// Stop previously running microphone
if (this.microphone.State == MicrophoneState.Started)
{
    this.microphone.Stop();
}

// Clear previous content of microphone

this.microphone.BufferDuration = TimeSpan.FromMilliseconds(1000);

this.microphone.Start();

// Store recorded audio
 this.buffer = new byte[this.microphone.GetSampleSizeInBytes(this.microphone.BufferDuration)];

Is there any problem with using microphone class? Does it get cleared or what after coming from a device back button press?

Thanks in advance. Please let me know if there is any doubt in the question.

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迎风吟唱 2024-10-27 06:24:16

如果您在某个页面上启动麦克风,然后向后导航,该页面以及任何缓冲的录音都将被销毁。当您下次导航到该页面时,将创建该页面的新实例以及新的麦克风(和流/缓冲区)。

这是你的场景吗?

如果我是你,我会在应用程序级别创建麦克风,这样它就不会受到应用程序中页面之间导航的影响。

If you start a microphone on a page then navigate away backwards from it, that page will be destroyed, along with any buffered recording. When you next navigate to that page a new instance of it will be created along with a new microphone (and stream/buffer).

Is this your scenario?

If I were you I'd create the microphone at application level so it doesn't risk being impacted by navigation between pages in the app.

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