有的时候我们需要检查系统默认喇叭,麦克风的静音状态以及设置静音
该怎么做呢?
请参考以下代码
#include <Mmdeviceapi.h>
#include <Endpointvolume.h>
#include <Audioclient.h>
#include <Audiopolicy.h>
const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);
const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);
const IID IID_IAudioEndpointVolume = __uuidof(IAudioEndpointVolume);
const IID IID_ISimpleAudioVolume = __uuidof(ISimpleAudioVolume);
const IID IID_IAudioSessionManager = __uuidof(IAudioSessionManager);
CComPtr<IMMDeviceEnumerator > m_pIMMEnumerator;
CComPtr<IAudioEndpointVolume> m_pRenderEndptVol;
CComPtr<ISimpleAudioVolume> m_pRenderSimpleVol;
CComPtr<IMMDevice> pIMMDeivce = NULL;
HRESULT hr = S_OK;
hr = CoCreateInstance(CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER,
IID_IMMDeviceEnumerator, (void**)&m_pIMMEnumerator);
//Audio
//hr = m_pIMMEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pIMMDeivce);
//Microphone
hr = m_pIMMEnumerator->GetDefaultAudioEndpoint(eCapture, eConsole, &pIMMDeivce);
hr = pIMMDeivce->Activate(IID_IAudioEndpointVolume, CLSCTX_ALL, NULL, (void**)&m_pRenderEndptVol);
BOOL bMute = FALSE;
hr = m_pRenderEndptVol->GetMute(&bMute);
bMute = TRUE;
hr = m_pRenderEndptVol->SetMute(bMute, NULL);