LunaTranslator/cpp/winsharedutils/muteprocess.cpp

class CAudioMgr
{
public:
    CAudioMgr();
    ~CAudioMgr();

public:
    BOOL SetProcessMute(DWORD Pid, bool mute);
    bool GetProcessMute(DWORD Pid);

private:
    BOOL __GetAudioSessionMgr2();

private:
    HRESULT m_hRes;
    IAudioSessionManager2 *m_lpAudioSessionMgr;
};
CAudioMgr::CAudioMgr()
    : m_hRes(ERROR_SUCCESS), m_lpAudioSessionMgr(NULL)
{
    ::CoInitialize(NULL);
}

CAudioMgr::~CAudioMgr()
{
    ::CoUninitialize();
}

bool CAudioMgr::GetProcessMute(DWORD Pid)
{
    if (!this->__GetAudioSessionMgr2() || m_lpAudioSessionMgr == NULL)
    {
        return FALSE;
    }

    CComPtr<IAudioSessionEnumerator> pAudioSessionEnumerator;
    m_hRes = m_lpAudioSessionMgr->GetSessionEnumerator(&pAudioSessionEnumerator);
    if (FAILED(m_hRes) || pAudioSessionEnumerator == NULL)
    {
        return FALSE;
    }

    int nCount = 0;
    m_hRes = pAudioSessionEnumerator->GetCount(&nCount);

    for (int i = 0; i < nCount; ++i)
    {
        CComPtr<IAudioSessionControl> pAudioSessionControl;
        m_hRes = pAudioSessionEnumerator->GetSession(i, &pAudioSessionControl);
        if (FAILED(m_hRes) || pAudioSessionControl == NULL)
        {
            continue;
        }

        CComQIPtr<IAudioSessionControl2> pAudioSessionControl2(pAudioSessionControl);
        if (pAudioSessionControl2 == NULL)
        {
            continue;
        }

        DWORD dwPid = 0;
        m_hRes = pAudioSessionControl2->GetProcessId(&dwPid);
        if (FAILED(m_hRes))
        {
            continue;
        }

        if (dwPid == Pid)
        {
            CComQIPtr<ISimpleAudioVolume> pSimpleAudioVolume(pAudioSessionControl2);
            if (pSimpleAudioVolume == NULL)
            {
                continue;
            }
            BOOL mute;
            m_hRes = pSimpleAudioVolume->GetMute(&mute);
            return mute;
        }
    }

    return false;
}
BOOL CAudioMgr::SetProcessMute(DWORD Pid, bool mute)
{
    if (!this->__GetAudioSessionMgr2() || m_lpAudioSessionMgr == NULL)
    {
        return FALSE;
    }

    CComPtr<IAudioSessionEnumerator> pAudioSessionEnumerator;
    m_hRes = m_lpAudioSessionMgr->GetSessionEnumerator(&pAudioSessionEnumerator);
    if (FAILED(m_hRes) || pAudioSessionEnumerator == NULL)
    {
        return FALSE;
    }

    int nCount = 0;
    m_hRes = pAudioSessionEnumerator->GetCount(&nCount);

    for (int i = 0; i < nCount; ++i)
    {
        CComPtr<IAudioSessionControl> pAudioSessionControl;
        m_hRes = pAudioSessionEnumerator->GetSession(i, &pAudioSessionControl);
        if (FAILED(m_hRes) || pAudioSessionControl == NULL)
        {
            continue;
        }

        CComQIPtr<IAudioSessionControl2> pAudioSessionControl2(pAudioSessionControl);
        if (pAudioSessionControl2 == NULL)
        {
            continue;
        }

        DWORD dwPid = 0;
        m_hRes = pAudioSessionControl2->GetProcessId(&dwPid);
        if (FAILED(m_hRes))
        {
            continue;
        }

        if (dwPid == Pid)
        {
            CComQIPtr<ISimpleAudioVolume> pSimpleAudioVolume(pAudioSessionControl2);
            if (pSimpleAudioVolume == NULL)
            {
                continue;
            }
            m_hRes = pSimpleAudioVolume->SetMute(mute, NULL);
            break;
        }
    }

    return SUCCEEDED(m_hRes);
}

BOOL CAudioMgr::__GetAudioSessionMgr2()
{
    if (m_lpAudioSessionMgr == NULL)
    {
        CComPtr<IMMDeviceEnumerator> pMMDeviceEnumerator;

        m_hRes = pMMDeviceEnumerator.CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL);
        if (FAILED(m_hRes) || (pMMDeviceEnumerator == NULL))
        {
            return FALSE;
        }

        CComPtr<IMMDevice> pDefaultDevice;
        m_hRes = pMMDeviceEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pDefaultDevice);
        if (FAILED(m_hRes) || pDefaultDevice == NULL)
        {
            return FALSE;
        }

        m_hRes = pDefaultDevice->Activate(__uuidof(IAudioSessionManager2), CLSCTX_ALL, NULL, (void **)&m_lpAudioSessionMgr);
        if (FAILED(m_hRes) || (m_lpAudioSessionMgr == NULL))
        {
            return FALSE;
        }
    }

    return TRUE;
}

DECLARE_API BOOL SetProcessMute(DWORD Pid, bool mute)
{
    CAudioMgr AudioMgr;
    return AudioMgr.SetProcessMute(Pid, mute);
}

DECLARE_API bool GetProcessMute(DWORD Pid)
{
    CAudioMgr AudioMgr;
    return AudioMgr.GetProcessMute(Pid);
}