qavfcamerarotationtracker_p.h

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// Copyright (C) 2025 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 QAVFCAMERAROTATIONTRACKER_P_H

#define QAVFCAMERAROTATIONTRACKER_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/qtconfigmacros.h>

#include <QtCore/qdarwinhelpers.h>

#include <QtMultimedia/private/qavfcamerautility_p.h>

#include <os/availability.h>

#include <AVFoundation/AVCaptureDevice.h>

QT_BEGIN_NAMESPACE

namespace QFFmpeg {

// Gives us rotational information for an AVCaptureDevice

class AvfCameraRotationTracker

public:

    AvfCameraRotationTracker() = default;

    explicit AvfCameraRotationTracker(AVCaptureDevice* avCaptureDevice);

    AvfCameraRotationTracker(AvfCameraRotationTracker &&) noexcept;

    QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_MOVE_AND_SWAP(AvfCameraRotationTracker)

    ~AvfCameraRotationTracker();

    void swap(AvfCameraRotationTracker &other);

    // Guaranteed to return rotation in clockwise 90 degree increments.

    [[nodiscard]] int rotationDegrees() const;

    [[nodiscard]] AVCaptureDevice *avCaptureDevice() const { return m_avCaptureDevice.data(); }

private:

    void clear();

    AVFScopedPointer<AVCaptureDevice> m_avCaptureDevice;

    // If running iOS or macOS 14+, we use AVCaptureDeviceRotationCoordinator

    // to get the camera rotation directly from the camera-device.

    API_AVAILABLE(macos(14.0))

    AVFScopedPointer<AVCaptureDeviceRotationCoordinator> m_avRotationCoordinator;

};

} // namespace QFFmpeg

QT_END_NAMESPACE

#endif // QAVFCAMERAROTATIONTRACKER_P_H