avfimagecapture_p.h

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// Copyright (C) 2016 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 AVFCAMERAIMAGECAPTURE_H

#define AVFCAMERAIMAGECAPTURE_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/qplatformimagecapture_p.h>

#include <QtCore/qsemaphore.h>

#include <camera/avfcamerasession_p.h>

#include <memory>

#include <queue>

#import <AVFoundation/AVFoundation.h>

QT_BEGIN_NAMESPACE

class AVFImageCapture final : public QPlatformImageCapture

    Q_OBJECT

public:

    struct CaptureRequest {

        int captureId{};

        std::shared_ptr<QSemaphore> previewReady;

};

    AVFImageCapture(QImageCapture *parent = nullptr);

    ~AVFImageCapture() override;

    bool isReadyForCapture() const override;

    AVCaptureStillImageOutput *stillImageOutput() const {return m_stillImageOutput;}

    int doCapture(const QString &fileName);

    int capture(const QString &fileName) override;

    int captureToBuffer() override;

    QImageEncoderSettings imageSettings() const override;

    void setImageSettings(const QImageEncoderSettings &settings) override;

    bool applySettings();

    void setCaptureSession(QPlatformMediaCaptureSession *session);

private Q_SLOTS:

    void updateCaptureConnection();

    void updateReadyStatus();

    void onNewViewfinderFrame(const QVideoFrame &frame);

    void onCameraChanged();

private:

    bool videoCaptureDeviceIsValid() const;

    AVFCameraService *m_service = nullptr;

    AVFCameraSession *m_session = nullptr;

    AVFCamera *m_cameraControl = nullptr;

    bool m_ready = false;

    int m_lastCaptureId = 0;

    AVCaptureStillImageOutput *m_stillImageOutput;

    AVCaptureConnection *m_videoConnection = nullptr;

    QMutex m_requestsMutex;

    std::queue<CaptureRequest> m_captureRequests;

    QImageEncoderSettings m_settings;

};

QT_END_NAMESPACE

#endif