qandroidcamerasession_p.h

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// Copyright (C) 2016 The Qt Company Ltd.

// Copyright (C) 2016 Ruslan Baratov

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QANDROIDCAMERASESSION_H

#define QANDROIDCAMERASESSION_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 <qcamera.h>

#include <QImageCapture>

#include <QSet>

#include <QMutex>

#include <private/qplatformimagecapture_p.h>

#include "androidcamera_p.h"

QT_BEGIN_NAMESPACE

class QAndroidVideoOutput;

class QAndroidTextureVideoOutput ;

class QVideoSink;

class QAndroidCameraSession : public QObject

    Q_OBJECT

public:

    explicit QAndroidCameraSession(QObject *parent = 0);

    ~QAndroidCameraSession();

    static const QList<QCameraDevice> &availableCameras();

    void setSelectedCameraId(int cameraId) { m_selectedCamera = cameraId; }

    int getSelectedCameraId() { return m_selectedCamera; }

    AndroidCamera *camera() const { return m_camera; }

    bool isActive() const { return m_active; }

    void setActive(bool active);

    void applyResolution(const QSize &captureSize = QSize(), bool restartPreview = true);

    QAndroidVideoOutput *videoOutput() const { return m_videoOutput; }

    void setVideoOutput(QAndroidVideoOutput *output);

    void setCameraFormat(const QCameraFormat &format);

    QList<QSize> getSupportedPreviewSizes() const;

    QList<QVideoFrameFormat::PixelFormat> getSupportedPixelFormats() const;

    QList<AndroidCamera::FpsRange> getSupportedPreviewFpsRange() const;

    QImageEncoderSettings imageSettings() const { return m_actualImageSettings; }

    void setImageSettings(const QImageEncoderSettings &settings);

    bool isReadyForCapture() const;

    void setReadyForCapture(bool ready);

    int capture(const QString &fileName);

    int captureToBuffer();

    int currentCameraRotation() const;

    void setPreviewFormat(AndroidCamera::ImageFormat format);

    struct PreviewCallback

        virtual void onFrameAvailable(const QVideoFrame &frame) = 0;

};

    void setPreviewCallback(PreviewCallback *callback);

    void setVideoSink(QVideoSink *surface);

    void disableRotation();

    void enableRotation();

    void setKeepAlive(bool keepAlive);

Q_SIGNALS:

    void activeChanged(bool);

    void error(int error, const QString &errorString);

    void opened();

    void readyForCaptureChanged(bool);

    void imageExposed(int id);

    void imageCaptured(int id, const QImage &preview);

    void imageMetadataAvailable(int id, const QMediaMetaData &key);

    void imageAvailable(int id, const QVideoFrame &buffer);

    void imageSaved(int id, const QString &fileName);

    void imageCaptureError(int id, int error, const QString &errorString);

private Q_SLOTS:

    void onVideoOutputReady(bool ready);

    void updateOrientation();

    void onApplicationStateChanged();

    void onCameraTakePictureFailed();

    void onCameraPictureExposed();

    void onCameraPictureCaptured(const QByteArray &bytes, QVideoFrameFormat::PixelFormat format, QSize size, int bytesPerLine);

    void onLastPreviewFrameFetched(const QVideoFrame &frame);

    void onNewPreviewFrame(const QVideoFrame &frame);

    void onCameraPreviewStarted();

    void onCameraPreviewFailedToStart();

    void onCameraPreviewStopped();

private:

    static void updateAvailableCameras();

    bool open();

    void close();

    bool startPreview();

    void stopPreview();

    void applyImageSettings();

    void processPreviewImage(int id, const QVideoFrame &frame, int rotation);

    void processCapturedImage(int id, const QByteArray &bytes, const QString &fileName);

    void processCapturedImageToBuffer(int id, const QByteArray &bytes,

                              QVideoFrameFormat::PixelFormat format, QSize size, int bytesPerLine);

    void setActiveHelper(bool active);

    int captureImage();

    QSize getDefaultResolution() const;

    int m_selectedCamera;

    AndroidCamera *m_camera;

    QAndroidVideoOutput *m_videoOutput;

    bool m_active = false;

    bool m_isStateSaved = false;

    bool m_savedState = false;

    bool m_previewStarted;

    bool m_rotationEnabled = false;

    QVideoSink *m_sink = nullptr;

    QAndroidTextureVideoOutput *m_textureOutput = nullptr;

    QImageEncoderSettings m_requestedImageSettings;

    QImageEncoderSettings m_actualImageSettings;

    AndroidCamera::FpsRange m_requestedFpsRange;

    AndroidCamera::ImageFormat m_requestedPixelFromat = AndroidCamera::ImageFormat::NV21;

    bool m_readyForCapture;

    int m_currentImageCaptureId;

    QString m_currentImageCaptureFileName;

    bool m_imageCaptureToBuffer;

    QMutex m_videoFrameCallbackMutex;

    PreviewCallback *m_previewCallback;

    bool m_keepActive;

    QMetaObject::Connection m_retryPreviewConnection;

};

QT_END_NAMESPACE

#endif // QANDROIDCAMERASESSION_H