avfcamerasession_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 AVFCAMERASESSION_H

#define AVFCAMERASESSION_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/qcamera.h>

#include <QtMultimedia/qcameradevice.h>

#include <QtMultimedia/qvideoframe.h>

#include <QtCore/qmutex.h>

#include <camera/avfaudiopreviewdelegate_p.h>

#import <AVFoundation/AVFoundation.h>

@class AVFCameraSessionObserver;

QT_BEGIN_NAMESPACE

class AVFCamera;

class AVFCameraService;

class AVFCameraRenderer;

class AVFVideoSink;

class QVideoSink;

class AVFCameraSession : public QObject

    Q_OBJECT

public:

    AVFCameraSession(AVFCameraService *service, QObject *parent = nullptr);

    ~AVFCameraSession() override;

    QCameraDevice activecameraDevice() const { return m_activeCameraDevice; }

    void setActiveCamera(const QCameraDevice &info);

    void setCameraFormat(const QCameraFormat &format);

    QCameraFormat cameraFormat() const;

    AVFCameraRenderer *videoOutput() const { return m_videoOutput; }

    AVCaptureAudioDataOutput *audioOutput() const { return m_audioOutput; }

    AVFAudioPreviewDelegate *audioPreviewDelegate() const { return m_audioPreviewDelegate; }

    AVCaptureSession *captureSession() const { return m_captureSession; }

    AVCaptureDevice *videoCaptureDevice() const;

    AVCaptureDevice *audioCaptureDevice() const;

    bool isActive() const;

    FourCharCode defaultCodec();

    AVCaptureDeviceInput *videoInput() const { return m_videoInput; }

    AVCaptureDeviceInput *audioInput() const { return m_audioInput; }

    void setVideoSink(QVideoSink *sink);

    void updateVideoInput();

    void updateAudioInput();

    void updateAudioOutput();

public Q_SLOTS:

    void setActive(bool active);

    void setAudioInputVolume(float volume);

    void setAudioInputMuted(bool muted);

    void setAudioOutputMuted(bool muted);

    void setAudioOutputVolume(float volume);

    void processRuntimeError();

    void processSessionStarted();

    void processSessionStopped();

Q_SIGNALS:

    void readyToConfigureConnections();

    void activeChanged(bool);

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

    void newViewfinderFrame(const QVideoFrame &frame);

private:

    void updateCameraFormat(const QCameraFormat &format);

    void setVideoOutput(AVFCameraRenderer *output);

    void updateVideoOutput();

    void addAudioCapture();

    AVCaptureDevice *createVideoCaptureDevice();

    AVCaptureDevice *createAudioCaptureDevice();

    void attachVideoInputDevice();

    void attachAudioInputDevice();

    bool checkCameraPermission();

    bool checkMicrophonePermission();

    bool applyImageEncoderSettings();

    QCameraDevice m_activeCameraDevice;

    QCameraFormat m_cameraFormat;

    AVFCameraService *m_service;

    AVCaptureSession *m_captureSession;

    AVFCameraSessionObserver *m_observer;

    AVFCameraRenderer *m_videoOutput = nullptr;

    AVFVideoSink *m_videoSink = nullptr;

    AVCaptureDeviceInput *m_videoInput = nullptr;

    AVCaptureDeviceInput *m_audioInput = nullptr;

    AVCaptureAudioDataOutput *m_audioOutput = nullptr;

    AVFAudioPreviewDelegate *m_audioPreviewDelegate = nullptr;

    bool m_active = false;

    float m_inputVolume = 1.0;

    bool m_inputMuted = false;

    FourCharCode m_defaultCodec;

};

QT_END_NAMESPACE

#endif