qplatformaudiodevices_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 QPLATFORMAUDIODEVICES_H

#define QPLATFORMAUDIODEVICES_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/private/qaudiodevice_p.h>

#include <QtMultimedia/private/qcachedvalue_p.h>

#include <QtMultimedia/private/qtmultimediaglobal_p.h>

#include <QtCore/qlist.h>

#include <QtCore/qobject.h>

#include <memory>

QT_BEGIN_NAMESPACE

class QPlatformAudioSource;

class QPlatformAudioSink;

class QAudioFormat;

class Q_MULTIMEDIA_EXPORT QPlatformAudioDevices : public QObject

    Q_OBJECT

    QT_DEFINE_TAG_STRUCT(PrivateTag);

public:

    QPlatformAudioDevices();

    ~QPlatformAudioDevices() override;

    static std::unique_ptr<QPlatformAudioDevices> create();

    QList<QAudioDevice> audioInputs() const;

    QList<QAudioDevice> audioOutputs() const;

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

                                                    QObject *parent);

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

                                                QObject *parent);

    QPlatformAudioSource *audioInputDevice(QAudioFormat, const QAudioDevice &, QObject *parent);

    QPlatformAudioSink *audioOutputDevice(QAudioFormat, const QAudioDevice &, QObject *parent);

    void initVideoDevicesConnection();

    virtual QLatin1String backendName() const { return QLatin1String{ "null" }; }

    virtual bool hasCallbackApi() const;

protected:

    virtual QList<QAudioDevice> findAudioInputs() const { return {}; }

    virtual QList<QAudioDevice> findAudioOutputs() const { return {}; }

    void onAudioInputsChanged();

    void onAudioOutputsChanged();

    void updateAudioInputsCache();

    void updateAudioOutputsCache();

Q_SIGNALS:

    void audioInputsChanged(PrivateTag);

    void audioOutputsChanged(PrivateTag);

private:

    mutable QCachedValue<QList<QAudioDevice>> m_audioInputs;

    mutable QCachedValue<QList<QAudioDevice>> m_audioOutputs;

};

QT_END_NAMESPACE

#endif // QPLATFORMAUDIODEVICES_H