> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# IAudioStateMonitor::UnregisterCallback method

> IAudioStateMonitor::UnregisterCallback method

# IAudioStateMonitor::UnregisterCallback method

이전에 [IAudioStateMonitor::RegisterCallback](/reference/audio/audiostatemonitor/interfaces/iaudiostatemonitor-registercallback)로 등록된 콜백을 등록 해제합니다.

## Syntax

```cpp theme={null}
void UnregisterCallback(
  AudioStateMonitorRegistrationHandle registration
);
```

### Parameters

*registration*<br />Type: AudioStateMonitorRegistrationHandle

등록 해제할 콜백을 식별하는 64비트 정수입니다. 이 값은 **RegisterCallback** 메서드의 *registration* 매개변수에서 반환됩니다.

### Return value

이 메서드는 값을 반환하지 않습니다.

## Remarks

다음 시나리오를 고려해 보세요. 게임이 정책상 OS에 의해 오디오가 음소거되지 않을 것이 확실할 때만 GameMedia 오디오를 재생하도록 선택합니다. 이를 위해 게임은 기본 콘솔 엔드포인트에서 [AudioCategory\_GameMedia](https://learn.microsoft.com/windows/desktop/api/audiosessiontypes/ne-audiosessiontypes-audio_stream_category) 스트림 카테고리에 대한 SoundLevel 알림에 등록합니다. 이 카테고리의 SoundLevel이 'Muted'로 설정되면 게임은 GameMedia 스트림의 재생을 중지합니다. SoundLevel이 다른 값으로 설정되면 게임은 GameMedia 스트림을 재생하도록 선택합니다.

```cpp theme={null}
// global variables 
winrt::com_ptr<IAudioStateMonitor> g_audioStateMonitor; 
AudioStateMonitorRegistrationHandle g_registration = 0; 

// Returns true if the GameMedia stream should be disabled, false if it should be 
// enabled. 
bool IsSoundLevelMuted(_In_ IAudioStateMonitor* audioStateMonitor) 
{ 
return (audioStateMonitor->GetSoundLevel() == AudioStateMonitorSoundLevel::Muted); 
} 

HRESULT StartTrackingSoundLevel() 
{ 
// Create an AudioStateMonitor and register for callbacks from it. 
HRESULT hr = RegisterForSoundLevelChanges(); 
if (SUCCEEDED(hr)) 
{ 
// Check the current sound level and determine if the GameMedia stream should 
// be enabled. 
bool disableGameMediaStream = IsSoundLevelMuted(g_audioStateMonitor.get()); 

// Add code here that enables or disables the GameMedia stream based on the 
// value of the boolean. 
} 
return hr; 
} 

HRESULT RegisterForSoundLevelChanges() 
{ 
HRESULT hr = S_OK; 

// Create a new AudioStateMonitor for the GameMedia category, if needed, and 
// register for callbacks. 
if (m_audioStateMonitor == nullptr) 
{ 
hr = CreateRenderAudioStateMonitorForCategoryAndDeviceRole( 
AudioCategory_GameMedia, ERole::eConsole, g_audioStateMonitor.put()); 
if (SUCCEEDED(hr)) 
{ 
// Optional "context" parameter is not used in this example, 
// and is set to nullptr. 
hr = g_audioStateMonitor->RegisterCallback(OnAudioStateMonitorCallback, nullptr, &g_registration); 
} 
} 

if (FAILED(hr)) 
{ 
// g_audioStateMonitor is a smart pointer, so if an IAudioStateMonitor was 
// allocated, setting the smart pointer to null invokes the Release method 
// which will decrement its usage count and ensure that the object is properly 
// destroyed. 
g_audioStateMonitor = nullptr; 
} 
return hr; 
} 

// Unregister callbacks on program shutdown 
void UnregisterForSoundLevelChanges() 
{ 
if (g_audioStateMonitor != nullptr) 
{ 
if (g_registration) 
{ 
g_audioStateMonitor->UnregisterCallback(g_registration); 
} 

// g_audioStateMonitor is a smart pointer, so setting it to null 
// invokes the Release method to decrement its usage count. 
g_audioStateMonitor = nullptr; 
} 
} 

void OnAudioStateMonitorCallback(_In_ IAudioStateMonitor* audioStateMonitor, _In_opt_ void* context) 
{ bool disableGameMediaStream = IsSoundLevelMuted(audioStateMonitor); 

// Add code here that enables or disables the GameMedia stream based on the value 
// of the boolean. 
} 
```

## Requirements

**Header:** Audiostatemonitorapi.h

**지원 플랫폼:** Windows, XBOX One 제품군 콘솔 및 XBOX Series 콘솔

## See also

[IAudioStateMonitor](/reference/audio/audiostatemonitor/interfaces/iaudiostatemonitor)

[WASAPI 소개](https://learn.microsoft.com/en-us/windows/desktop/CoreAudio/wasapi)


## Related topics

- [IAudioStateMonitor::RegisterCallback method](/ko/reference/audio/audiostatemonitor/interfaces/iaudiostatemonitor-registercallback.md)
- [IAudioStateMonitor::GetSoundLevel method](/ko/reference/audio/audiostatemonitor/interfaces/iaudiostatemonitor-getsoundlevel.md)
- [IAudioStateMonitor interface](/ko/reference/audio/audiostatemonitor/interfaces/iaudiostatemonitor.md)
- [AudioStateMonitorRegistrationHandle](/ko/reference/audio/audiostatemonitor/types/audiostatemonitorregistrationhandle.md)
- [AudioStateMonitor](/ko/reference/audio/audiostatemonitor/audiostatemonitor_members.md)