private static Win7ComInterface.IAudioMeterInformation GetAudioMeterInformation()
{
Win7ComInterface.IAudioMeterInformation result = null;
InvokeTryCatch("Win7VolumeOperate.GetAudioMeterInformation", () =>
{
Win7ComInterface.IMMDevice device = Device;
if (device == null)
{
return;
}
const uint CLSCTX_ALL = 23u;
object comMeterInfo;
Guid IID_IAudioMeterInformation = typeof(Win7ComInterface.IAudioMeterInformation).GUID;
Marshal.ThrowExceptionForHR(device.Activate(ref IID_IAudioMeterInformation, CLSCTX_ALL, IntPtr.Zero, out comMeterInfo));
Win7ComInterface.IAudioMeterInformation meterInfo = comMeterInfo as Win7ComInterface.IAudioMeterInformation;
if (meterInfo == null)
{
throw new Exception("初始化 Win7以上操作系统的 音频Com IAudioMeterInformation 组件失败!");
}
int HardwareSupp;
Marshal.ThrowExceptionForHR(meterInfo.QueryHardwareSupport(out HardwareSupp));
result = meterInfo;
});
return(result);
}
private static Win7ComInterface.IAudioEndpointVolume GetAudioEndPointVolume()
{
Win7ComInterface.IAudioEndpointVolume result = null;
InvokeTryCatch("Win7VolumeOperate.GetAudioEndPointVolume", () =>
{
Win7ComInterface.IMMDevice device = Device;
if (device == null)
{
return;
}
const uint CLSCTX_ALL = 23u;
object comEndPointVol;
Guid IID_IAudioEndpointVolume = typeof(Win7ComInterface.IAudioEndpointVolume).GUID;
Marshal.ThrowExceptionForHR(device.Activate(ref IID_IAudioEndpointVolume, CLSCTX_ALL, IntPtr.Zero, out comEndPointVol));
Win7ComInterface.IAudioEndpointVolume endPointVol = comEndPointVol as Win7ComInterface.IAudioEndpointVolume;
if (endPointVol == null)
{
throw new Exception("初始化 Win7以上操作系统的 音频Com IAudioEndpointVolume 组件失败!");
}
uint HardwareSupp;
Marshal.ThrowExceptionForHR(endPointVol.QueryHardwareSupport(out HardwareSupp));
result = endPointVol;
});
return(result);
}
private static Win7ComInterface.IMMDevice GetDefaultAudioEndpoint(int dataFlow, int role)
{
Win7ComInterface.IMMDevice result = null;
InvokeTryCatch("Win7VolumeOperate.GetDefaultAudioEndpoint", () =>
{
Win7ComInterface.IMMDeviceEnumerator _realEnumerator = new Win7ComInterface._MMDeviceEnumerator() as Win7ComInterface.IMMDeviceEnumerator;
if (_realEnumerator == null)
{
throw new Exception("初始化 Win7以上操作系统的 音频Com MMDeviceEnumerator 组件失败!");
}
Win7ComInterface.IMMDevice device = null;
int errorCode = _realEnumerator.GetDefaultAudioEndpoint((int)dataFlow, (int)role, out device);
Marshal.ThrowExceptionForHR(errorCode);
result = device;
});
return(result);
}
