Interface IAudioEffectsManager (audioclient.h)

Fournit des fonctionnalités de gestion pour le pipeline d’effets audio pour le flux audio associé, ce qui permet aux applications d’obtenir la liste actuelle des effets, de définir l’état des effets et de s’inscrire aux notifications lorsque la liste des effets ou les états d’effet changent.

Héritage

L’interface IAudioEffectsManager hérite de l’interface IUnknown.

Méthodes

L’interface IAudioEffectsManager possède ces méthodes.

Remarques

Obtenez une instance de cette interface en appelant IAudioClient ::GetService en passant le pointeur d’interface de l’interface IAudioEffectsManager.

wil::com_ptr_nothrow<IAudioEffectsManager> audioEffectsManager;
RETURN_IF_FAILED(client->GetService(IID_PPV_ARGS(&audioEffectsManager)));

Exemples

L’exemple suivant illustre IAudioEffectsManager.GetAudioEffects pour détecter si l’effet AUDIO_EFFECT_TYPE_DEEP_NOISE_SUPPRESSION est présent sur le flux audio spécifié.

HRESULT IsPlatformDeepNoiseSuppressionPresent(_In_ IAudioClient *client, _Out_ bool *isPresent)
{
    *isPresent = false;
    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++)
    {
        // Check if noise suppression is part of the current effects
        if (effects[i].id == AUDIO_EFFECT_TYPE_DEEP_NOISE_SUPPRESSION)
        {
            *isPresent = true;
            return S_OK;
        }
    }

    return S_OK;
}

L’exemple suivant montre comment utiliser IAudioEffectsManager.SetAudioEffectState pour désactiver l’effet AUDIO_EFFECT_TYPE_DEEP_NOISE_SUPPRESSION .

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;
}

L’exemple suivant illustre l’utilisation de IAudioEffectsManager.SetAudioEffectState pour activer l’effet AUDIO_EFFECT_TYPE_DEEP_NOISE_SUPPRESSION .

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;
}

L’exemple de code suivant illustre une classe qui implémente IAudioEffectsChangedNotificationClient pour recevoir des notifications lorsque la liste des effets audio change ou que les ressources nécessaires pour activer un effet changent. Dans le rappel OnAudioStreamEffectsChanged , l’exemple appelle GetAudioEffects pour obtenir la liste actuelle des effets.

class AudioEffectsChangedHandler :
    public winrt::implements<AudioEffectsChangedHandler, IAudioEffectsChangedNotificationClient>
{

    public:
    AudioEffectsChangedHandler(_In_ IAudioClient *client) : m_client(client){}
    STDMETHOD(OnAudioEffectsChanged)()
    {
        OnAudioStreamEffectsChanged(m_client.get());
        return S_OK;
    }
    private:
    wil::com_ptr_nothrow<IAudioClient> m_client;

};

wil::com_ptr_nothrow<IAudioEffectsChangedNotificationClient> g_effectsChangedHandler;

HRESULT RegisterAudioStreamEffectsChangedEvent(_In_ IAudioClient *client)
{
    if (!g_effectsChangedHandler)
    {
        wil::com_ptr_nothrow<IAudioEffectsManager> audioEffectsManager;
        RETURN_IF_FAILED(client->GetService(IID_PPV_ARGS(&audioEffectsManager)));

        // Register for the audio effects changed notification
        g_effectsChangedHandler = winrt::make<AudioEffectsChangedHandler>(client).get();
        RETURN_IF_NULL_ALLOC(g_effectsChangedHandler);

        return audioEffectsManager->RegisterAudioEffectsChangedNotificationCallback(
            g_effectsChangedHandler.get());
    }
    return S_OK;
}

HRESULT UnregisterAudioStreamEffectsChangedEvent(_In_ IAudioClient *client)
{
    if (g_effectsChangedHandler != nullptr)
    {
        wil::com_ptr_nothrow<IAudioEffectsManager> audioEffectsManager;
        RETURN_IF_FAILED(client->GetService(IID_PPV_ARGS(&audioEffectsManager)));

        // Unregister from the audio effects changed notification 
        return audioEffectsManager->UnregisterAudioEffectsChangedNotificationCallback(
            g_effectsChangedHandler.get());
        }

        return S_OK;
}

HRESULT OnAudioStreamEffectsChanged(_In_ IAudioClient *client)
{
    // Re-query the list of effects since there was some change
    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++)
    {

        // Here the app can check which effects are still enabled, and check if there are new
        // effects that now can be enabled.
        // As an example, the following code enables any effect that can be enabled, if it is not
        // already enabled.
        if (effects[i].canSetState && effects[i].state == AUDIO_EFFECT_STATE_OFF)
        {
            HRESULT hr = audioEffectsManager->SetAudioEffectState(effects[i].id, AUDIO_EFFECT_STATE_ON));
            if (hr == AUDCLNT_E_EFFECT_NOT_AVAILABLE || hr == AUDCLNT_E_EFFECT_STATE_READ_ONLY)
            {
                hr = S_OK;
            }
            RETURN_IF_FAILED(hr);

        }
    }

    return S_OK;
}

Configuration requise