qv4l2filedescriptor_p.h

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// Copyright (C) 2023 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 QV4L2FILEDESCRIPTOR_P_H

#define QV4L2FILEDESCRIPTOR_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 <QtCore/qtclasshelpermacros.h>

#include <QtCore/private/quniquehandle_types_p.h>

#include <QtCore/private/qexpected_p.h>

#include <QtMultimedia/private/qtmultimediaglobal_p.h>

#include <linux/videodev2.h>

#include <system_error>

QT_BEGIN_NAMESPACE

namespace QtV4L2 {

class QV4L2FileDescriptor : public QUniqueFileDescriptorHandle

public:

    explicit QV4L2FileDescriptor(QUniqueFileDescriptorHandle descriptor);

    Q_DISABLE_COPY_MOVE(QV4L2FileDescriptor)

    q23::expected<int, std::error_code> call(int request, void *arg) const;

    q23::expected<int, std::error_code> requestBuffers(v4l2_memory memoryType,

                                                       uint32_t bufferCount) const;

    bool startStream();

    bool stopStream();

    bool streamStarted() const { return m_streamStarted; }

private:

    bool m_streamStarted = false;

};

} // namespace QtV4L2

QT_END_NAMESPACE

#endif // QV4L2FILEDESCRIPTOR_P_H