avfcamerarenderer_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 AVFCAMERARENDERER_H
#define AVFCAMERARENDERER_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/qobject.h>
#include <QtMultimedia/qvideoframe.h>
#include <QtCore/qmutex.h>
#include <avfvideosink_p.h>
#include <private/qvideooutputorientationhandler_p.h>
 
#include <CoreVideo/CVBase.h>
#include <CoreVideo/CVPixelBuffer.h>
#include <CoreVideo/CVImageBuffer.h>
#ifdef Q_OS_IOS
#include <CoreVideo/CVOpenGLESTexture.h>
#include <CoreVideo/CVOpenGLESTextureCache.h>
#endif
 
#include <dispatch/dispatch.h>
 
Q_FORWARD_DECLARE_OBJC_CLASS(AVFCaptureFramesDelegate);
Q_FORWARD_DECLARE_OBJC_CLASS(AVCaptureVideoDataOutput);
 
QT_BEGIN_NAMESPACE
 
class AVFCameraSession;
class AVFCameraService;
class AVFCameraRenderer;
class AVFVideoSink;
 
class AVFCameraRenderer : public QObject, public AVFVideoSinkInterface
{
Q_OBJECT
public:
    AVFCameraRenderer(QObject *parent = nullptr);
    ~AVFCameraRenderer() override;
 
    void reconfigure() override;
    void setOutputSettings() override;
 
    void configureAVCaptureSession(AVFCameraSession *cameraSession);
    void syncHandleViewfinderFrame(const QVideoFrame &frame);
 
    AVCaptureVideoDataOutput *videoDataOutput() const;
 
    AVFCaptureFramesDelegate *captureDelegate() const;
    void resetCaptureDelegate() const;
 
    void setPixelFormat(QVideoFrameFormat::PixelFormat pixelFormat,
                        QVideoFrameFormat::ColorRange colorRange);
 
Q_SIGNALS:
    void newViewfinderFrame(const QVideoFrame &frame);
 
private Q_SLOTS:
    void handleViewfinderFrame();
    void updateCaptureConnection();
public Q_SLOTS:
    void deviceOrientationChanged(int angle = -1);
 
private:
    AVFCaptureFramesDelegate *m_viewfinderFramesDelegate = nullptr;
    AVFCameraSession *m_cameraSession = nullptr;
    AVCaptureVideoDataOutput *m_videoDataOutput = nullptr;
 
    bool m_needsHorizontalMirroring = false;
 
#ifdef Q_OS_IOS
    CVOpenGLESTextureCacheRef m_textureCache = nullptr;
#endif
 
    QVideoFrame m_lastViewfinderFrame;
    QMutex m_vfMutex;
    dispatch_queue_t m_delegateQueue;
    QVideoOutputOrientationHandler m_orientationHandler;
 
    friend class CVImageVideoBuffer;
};
 
QT_END_NAMESPACE
 
#endif