如何在Windows 7中控制Microphone Boost? [英] How to control the Microphone Boost in Windows 7?

问题描述

我试图在C/C ++应用程序中使用MIXER API控制Windows 7中的Microphone Boost(电平/(静音)静音)，但我没有得到相同的控件.可以使用WASAPI完成吗?有人可以建议其他任何API来控制Windows 7中的Microphone Boost吗?

I am trying to control the Microphone Boost (level/(un)mute) in Windows 7 using the MIXER API in a C/C++ application, but I do not get the controls for the same. Can it be done using WASAPI? Can somebody suggest any other API to control the Microphone Boost in Windows 7?

这是我到目前为止所写的...

This is what I have written so far ...

const IID IID_IDeviceTopology = __uuidof(IDeviceTopology);
const IID IID_IPart = __uuidof(IPart);
const IID IID_IAudioAutoGainControl = __uuidof(IAudioAutoGainControl);

HRESULT hr = S_OK;
CoInitialize(NULL);

IMMDeviceEnumerator *deviceEnumerator = NULL;
hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER, __uuidof(IMMDeviceEnumerator), (LPVOID *)&deviceEnumerator);

IMMDevice *pEndptDev = NULL;

hr = deviceEnumerator->GetDefaultAudioEndpoint(eCapture, eConsole, &pEndptDev);
deviceEnumerator->Release();
deviceEnumerator = NULL;


IDeviceTopology *pDevTopoEndpt = NULL;
IConnector *pConnEndpt = NULL;
IConnector *pConnHWDev = NULL;
IPart *pPartConn = NULL;
IAudioAutoGainControl *pAGC = NULL;
IControlInterface *pControl = NULL;
UINT pCount = 0;
LPCGUID pIID = ;

// Get the endpoint device's IDeviceTopology interface.
hr = pEndptDev->Activate(IID_IDeviceTopology, CLSCTX_ALL, NULL, (void**)&pDevTopoEndpt);

// The device topology for an endpoint device always
// contains just one connector (connector number 0).
hr = pDevTopoEndpt->GetConnector(0, &pConnEndpt);

// Use the connector in the endpoint device to get the
// connector in the adapter device.
hr = pConnEndpt->GetConnectedTo(&pConnHWDev);

// Query the connector in the adapter device for
// its IPart interface.
hr = pConnHWDev->QueryInterface(IID_IPart, (void**)&pPartConn);

// Use the connector's IPart interface to get the
// IDeviceTopology interface for the adapter device.
hr = pPartConn->Activate(CLSCTX_ALL, IID_IAudioAutoGainControl, (void**)&pAGC);
hr = pPartConn->GetControlInterfaceCount(&pCount);
hr = pPartConn->GetControlInterface(pCount - 1, &pControl);
hr = pControl->GetIID((GUID *)pIID);

//BOOL bEnabled = false;
hr = pAGC->SetEnabled(true, pIID);

推荐答案

WASAPI是实现此目的的方法.

WASAPI is the way to do this.

http://msdn.microsoft.com/zh-CN/library/windows/desktop/dd316531%28v=vs.85%29.aspx

http://msdn.microsoft.com/zh-CN/library/windows/desktop/dd370853%28v=vs.85%29.aspx

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