Question

我想更改本地计算机麦克风的声级。我研究了很多，我找到了这个链接

- ＆GT;它是代码项目链接，但它是混合项目，我想只改变麦克风声级

- ＆GT;这再次给了一个项目，它是如此编译而且无法建立项目。

https://social.msdn.microsoft.com/Forums/vstudio/en-US/177779cd-28b9-4eae-8bc4-61263e8a876b/getting-and-setting-microphone-device-volume-using-c-code?forum=netfxbcl

和ı试试这个。

它只适用于exe的语音级别，如lync，skype。它需要进程名称。麦克风exe可以经常更改。所以我不能给出稳定的名字。我想尝试win32更改那么如何更改麦克风声级呢？ ı想要增加和降低声级

public static void SetMicrophoneVolume（string name，float level）

完整代码

   private static List<ISimpleAudioVolume> getAppVol(string name, EDataFlow eDataFlow)
{
  List<ISimpleAudioVolume> simpleAudioVolList = new System.Collections.Generic.List<ISimpleAudioVolume>();
  // get the speakers (1st render + multimedia) device
  IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
  IMMDevice speakers;
  deviceEnumerator.GetDefaultAudioEndpoint(eDataFlow, ERole.eMultimedia, out speakers);

  // activate the session manager. we need the enumerator
  Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
  object o;
  speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
  IAudioSessionManager2 mgr = (IAudioSessionManager2)o;

  // enumerate sessions for on this device
  IAudioSessionEnumerator sessionEnumerator;
  mgr.GetSessionEnumerator(out sessionEnumerator);
  int count;
  sessionEnumerator.GetCount(out count);

  for(int i = 0; i < count; i++)
  {
    IAudioSessionControl ctl;
    sessionEnumerator.GetSession(i, out ctl);
    IAudioSessionControl2 sessionCtl = ctl as IAudioSessionControl2;
    uint processId;
    string displayName;
    string iconPath;
    string sessionIdentifier;
    string sessionInstanceIdentifier;
    sessionCtl.GetProcessId(out processId);
    sessionCtl.GetDisplayName(out displayName);
    sessionCtl.GetIconPath(out iconPath);
    sessionCtl.GetSessionIdentifier(out sessionIdentifier);
    sessionCtl.GetSessionInstanceIdentifier(out sessionInstanceIdentifier);
    Debug.WriteLine("process id:" + processId + " name:" + displayName + " icon:" + iconPath + " sessionIdentifier:" + sessionIdentifier + " sessionInstanceIdentifier:" + sessionInstanceIdentifier);
    //Process process = Process.GetProcessesByName(name).FirstOrDefault<Process>(delegate(Process item) { return processId == item.Id; });
    if(sessionIdentifier.Contains(name))
    {
      simpleAudioVolList.Add((ISimpleAudioVolume)sessionCtl);
    }
  }
  Marshal.ReleaseComObject(sessionEnumerator);
  Marshal.ReleaseComObject(mgr);
  Marshal.ReleaseComObject(speakers);
  Marshal.ReleaseComObject(deviceEnumerator);
  return simpleAudioVolList;
}

private static void releasesimpleAudioVolList(List<ISimpleAudioVolume> volumeControlList)
{
  foreach(ISimpleAudioVolume item in volumeControlList)
  {
    Marshal.ReleaseComObject(item);
  }
}

public static void SetMicrophoneVolume(string name, float level)
{
  List<ISimpleAudioVolume> volumeList = getAppVol(name, EDataFlow.eCapture);

  Guid guid = Guid.Empty;
  foreach(ISimpleAudioVolume item in volumeList)
  {
    try
    {
      item.SetMasterVolume(level / 100, ref guid);
    }
    catch(Exception ex)
    {
      Debug.WriteLine(ex.ToString());
    }
  }
  releasesimpleAudioVolList(volumeList);
  return;
}

如何更改麦克风声级

0 个答案: