qwindowsaudiodevices_p.h

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// Copyright (C) 2021 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QWINDOWSAUDIODEVICES_H

#define QWINDOWSAUDIODEVICES_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API. It exists purely as an

// implementation detail. This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <QtMultimedia/qaudiodevice.h>

#include <QtMultimedia/private/qplatformaudiodevices_p.h>

#include <QtMultimedia/private/qwindowsmediafoundation_p.h>

#include <QtCore/qmutex.h>

#include <QtCore/qchronotimer.h>

#include <QtCore/private/qcomptr_p.h>

struct IAudioClient3;

struct IMMDevice;

struct IMMDeviceEnumerator;

QT_BEGIN_NAMESPACE

namespace QtWASAPI {

class CMMNotificationClient;

} // namespace QtWASAPI

class QWindowsAudioDevices : public QPlatformAudioDevices

public:

    QWindowsAudioDevices();

    virtual ~QWindowsAudioDevices();

    QPlatformAudioSource *createAudioSource(const QAudioDevice &, const QAudioFormat &,

                                            QObject *parent) override;

    QPlatformAudioSink *createAudioSink(const QAudioDevice &, const QAudioFormat &,

                                        QObject *parent) override;

    using QPlatformAudioDevices::onAudioInputsChanged;

    using QPlatformAudioDevices::onAudioOutputsChanged;

    QLatin1String backendName() const override { return QLatin1String{ "WASAPI" }; }

    bool hasCallbackApi() const override { return true; }

protected:

    QList<QAudioDevice> findAudioInputs() const override;

    QList<QAudioDevice> findAudioOutputs() const override;

private:

    void scheduleAudioInputsChanged();

    void scheduleAudioOutputsChanged();

    QMFRuntimeInit m_wmfRuntime;

    QList<QAudioDevice> availableDevices(QAudioDevice::Mode mode) const;

    ComPtr<IMMDeviceEnumerator> m_deviceEnumerator;

    ComPtr<QtWASAPI::CMMNotificationClient> m_notificationClient;

    QChronoTimer m_audioInputsDebounce;

    QChronoTimer m_audioOutputsDebounce;

    friend QtWASAPI::CMMNotificationClient;

    mutable QMutex m_cacheMutex;

    mutable std::map<ComPtr<IMMDevice>, QAudioDevice> m_cachedDevices;

};

QT_END_NAMESPACE

#endif