WASAPI + Windows存储应用程序初始化 [英] WASAPI + windows store app initialization
问题描述
我正在尝试编写一个捕获您的语音的程序，将我的效果应用于捕获的音频并立即播放.我正在用C ++将这个应用程序写入Windows商店.在遭受MediaCapture的痛苦之后，我决定使用WASAPI来做到这一点.我正在使用msdn中的示例来设置 WASAPI .如我所料，我很快就遇到了问题.因此，问题出在以下两行:
I am trying to write a program which captures your speech applies my effect on the captured audio and play it back immediately. I am writing this app to the windows store in c++. After suffering with MediaCapture I decided to use WASAPI to do that. I am using an example from the msdn to set up WASAPI. As I expected I ran into a problem very soon. So the problem is with the following two lines:
const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);
const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);
视觉工作室说:
Error: operand of __uuidof must have a class or enum type for which __declspec(uuid('..')) has been specified.
我不知道这意味着什么.我希望在这里提供一些帮助.
I haven't got any idea what it means. I would appreciate some help here.
推荐答案
要能够使用__uuidof()，必须已为目标声明了uuid.在为Windows 8 Store Apps进行编译时，似乎MMDeviceEnumerator和IMMDeviceEnumerator没有任何uuid声明，而应使用Windows :: Devices :: Enumeration命名空间枚举设备，然后使用IActivateAudioInterfaceAsyncOperation初始化和激活音频设备.
To be able to use __uuidof() a uuid must have been declared for the target. When compiling for Windows 8 Store Apps it seems that MMDeviceEnumerator and IMMDeviceEnumerator don't have any uuid declaration and you should instead use the Windows::Devices::Enumeration namespace to enumerate the devices and then use IActivateAudioInterfaceAsyncOperation to initialize and activate the audio device.
这里是指向完整工作示例的链接，该示例捕获pcm数据并将其写入wav文件.它使用系统的默认音频捕获设备，但枚举可用设备并使用其中任何一个都是小菜一碟. :)
Here is a link to a fully working example that captures pcm data and writes it to a wav-file. It uses the systems' default audio capture device but enumerating the available devices and using any of them instead is a piece of cake. :)
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