qmockaudiosink_p.h

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// Copyright (C) 2026 The Qt Company Ltd.

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

#ifndef QMOCKAUDIOSINK_P_H

#define QMOCKAUDIOSINK_P_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/qaudiosystem_p.h>

QT_BEGIN_NAMESPACE

// Minimal QPlatformAudioSink stub: exists purely so that QAudioSink construction against a mock

// output device succeeds hermetically in unit tests. It never drives its stored callback itself;

// tests pump audio callbacks manually (e.g. via QRtAudioEngine::pumpAudioCallback).

class QMockAudioSink : public QPlatformAudioSink

public:

    QMockAudioSink(QAudioDevice device, const QAudioFormat &format, QObject *parent)

        : QPlatformAudioSink(std::move(device), format, parent)

    void start(QIODevice *) override { updateStreamState(QAudio::ActiveState); }

    QIODevice *start() override

        updateStreamState(QAudio::ActiveState);

        return nullptr;

    void start(AudioCallback &&) override { updateStreamState(QAudio::ActiveState); }

    bool hasCallbackAPI() override { return true; }

    void stop() override { updateStreamState(QAudio::StoppedState); }

    void reset() override { }

    void suspend() override { updateStreamState(QAudio::SuspendedState); }

    void resume() override { updateStreamState(QAudio::ActiveState); }

    qsizetype bytesFree() const override { return 0; }

    void setBufferSize(qsizetype) override { }

    qsizetype bufferSize() const override { return 0; }

    qint64 processedUSecs() const override { return 0; }

};

QT_END_NAMESPACE

#endif