Metro应用中的音频捕获 [英] audio capture in metro apps

问题描述

我需要在Windows 8 Metro风格的应用程序中执行低级音频捕获.

I need to perform low-level audio capture in my Windows 8 Metro-style app.

我想我需要使用IAudioClient接口，但是如何获取该接口?

I guess I need to use the IAudioClient interface, but how to get that interface?

Microsoft说:客户端通过使用IMMDevice接口中描述的一种技术，获得对音频终结点设备的IAudioClient接口的引用."

Microsoft says "A client obtains a reference to an IAudioClient interface for an audio endpoint device by using one of the techniques described in IMMDevice Interface.."

http://msdn .microsoft.com/en-us/library/windows/desktop/dd370865(v = vs.85).aspx

但是Metro风格的应用程序不支持IMMDevice界面.

but IMMDevice interface is not supported for Metro-style apps.

如何获得IAudioClient接口?

How does one get an IAudioClient interface ?

推荐答案

我从MSDN论坛上得到了答案:

I got an answer from the MSDN forums:

Platform::String^ id = Windows::Media::Devices::MediaDevice::GetDefaultAudioCaptureId(Windows::Media::Devices::AudioDeviceRole::Console );
Microsoft::WRL::ComPtr<IAudioClient> pAudioClient = NULL;
ActivateAudioInterface( id->Data(), __uuidof( IAudioClient ), (void**)&pAudioClient );

这个ActivateAudioInterface()对我来说是神秘的-MSDN Library中根本没有对其的引用；搜索的唯一命中是在论坛中...

This ActivateAudioInterface() is mysterious to me—there are no references to it at all in the MSDN Library; the only hits on searches for it are in the forums...

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