IAudioEffectsManager::SetAudioEffectState method (audioclient.h)

Sets the state of the specified audio effect.

Syntax

HRESULT SetAudioEffectState(
  GUID               effectId,
  AUDIO_EFFECT_STATE state
);

Parameters

effectId

The GUID identifier of the effect for which the state is being changed. Audio effect GUIDs are defined in ksmedia.h.

state

A value from the AUDIO_EFFECT_STATE enumerating specifying the state to set.

Return value

Returns an HRESULT including but not limited to the following.

Remarks

Get the current list of audio effects for the associated audio stream by calling GetAudioEffects.

Examples

The following example demonstrates using IAudioEffectsManager.SetAudioEffectState to disable the AUDIO_EFFECT_TYPE_DEEP_NOISE_SUPPRESSION effect.

HRESULT TryDisablePlatformDeepNoiseSuppression(_In_ IAudioClient *client)
{
    wil::com_ptr_nothrow<IAudioEffectsManager> audioEffectsManager;
    RETURN_IF_FAILED(client->GetService(IID_PPV_ARGS(&audioEffectsManager)));
    wil::unique_cotaskmem_array_ptr<AudioEffect> effects;
    UINT32 numEffects;
    RETURN_IF_FAILED(audioEffectsManager->GetAudioEffects(&effects, &numEffects));

    for (UINT32 i = 0; i < numEffects; i++)
    {
        if (effects[i].id == AUDIO_EFFECT_TYPE_DEEP_NOISE_SUPPRESSION)
        {
            // Check if deep noise suppression can be set and if it is currently on
            if (effects[i].canSetState && effects[i].state == AUDIO_EFFECT_STATE_ON)
            {
                HRESULT hr = audioEffectsManager->SetAudioEffectState(effects[i].id, AUDIO_EFFECT_STATE_OFF);

                // If canSetState changed to false, or the effect was removed, SetAudioEffectState
                // can fail with one of the following error codes.
                if (hr != AUDCLNT_E_EFFECT_NOT_AVAILABLE && hr != AUDCLNT_E_EFFECT_STATE_READ_ONLY)
                {
                    return hr;
                }
            }

            return S_OK;
        }
    }

    return S_OK;
}

The following example demonstrates using IAudioEffectsManager.SetAudioEffectState to enable the AUDIO_EFFECT_TYPE_DEEP_NOISE_SUPPRESSION effect.

HRESULT TryEnablePlatformDeepNoiseSuppression(_In_ IAudioClient *client)
{
    wil::com_ptr_nothrow<IAudioEffectsManager> audioEffectsManager;
    RETURN_IF_FAILED(client->GetService(IID_PPV_ARGS(&audioEffectsManager)));
    wil::unique_cotaskmem_array_ptr<AUDIO_EFFECT> effects;
    UINT32 numEffects;
    RETURN_IF_FAILED(audioEffectsManager->GetAudioEffects(&effects, &numEffects));

    for (UINT32 i = 0; i < numEffects; i++)
    {
        if (effects[i].id == AUDIO_EFFECT_TYPE_DEEP_NOISE_SUPPRESSION)
        {
            // Check if deep noise suppression can be set and if it is currently off
            if (effects[i].canSetState && effects[i].state == AUDIO_EFFECT_STATE_OFF)
            {
                HRESULT hr = audioEffectsManager->SetAudioEffectState(effects[i].id, AUDIO_EFFECT_STATE_ON);

                // If canSetState changed to false, or the effect was removed, SetAudioEffectState
                // can fail with one of the following error codes.
                if (hr != AUDCLNT_E_EFFECT_NOT_AVAILABLE && hr != AUDCLNT_E_EFFECT_STATE_READ_ONLY)
                {
                    return hr;
                }
            }

            return S_OK;
        }
        }

        return S_OK;
}

Requirements