qmocksurfacecapture.h

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// Copyright (C) 2021 The Qt Company Ltd.

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

#ifndef QMOCKSURFACECAPTURE_H

#define QMOCKSURFACECAPTURE_H

#include "qmockvideobuffer.h"

#include <QtMultimedia/private/qplatformsurfacecapture_p.h>

#include <QtMultimedia/private/qvideoframe_p.h>

#include <QtCore/qthread.h>

QT_BEGIN_NAMESPACE

class QMockSurfaceCapture : public QPlatformSurfaceCapture

    class Grabber : public QThread

    public:

        Grabber(QMockSurfaceCapture &capture) : QThread(&capture), m_capture(capture) { }

        void run() override

            for (int i = 0; !isInterruptionRequested(); ++i) {

                QImage image(m_capture.m_imageSize, QImage::Format_ARGB32);

                image.fill(i % 2 ? Qt::red : Qt::blue);

                QVideoFrame frame = QVideoFramePrivate::createFrame(

                        std::make_unique<QMockVideoBuffer>(image),

                        QVideoFrameFormat(m_capture.m_imageSize,

                                          QVideoFrameFormat::pixelFormatFromImageFormat(

                                                  m_capture.m_imageFormat)));

                emit m_capture.newVideoFrame(frame);

    private:

        QMockSurfaceCapture &m_capture;

};

public:

    using QPlatformSurfaceCapture::QPlatformSurfaceCapture;

    ~QMockSurfaceCapture() { resetGrabber(); }

    bool setActiveInternal(bool active) override

        if (active) {

            m_grabber = std::make_unique<Grabber>(*this);

            m_grabber->start();

        } else {

            resetGrabber();

        return true;

    bool isActive() const override { return bool(m_grabber); }

    QVideoFrameFormat frameFormat() const override

        return m_grabber ? QVideoFrameFormat(

                       m_imageSize, QVideoFrameFormat::pixelFormatFromImageFormat(m_imageFormat))

                         : QVideoFrameFormat{};

private:

    void resetGrabber()

        if (m_grabber) {

            m_grabber->requestInterruption();

            m_grabber->quit();

            m_grabber->wait();

            m_grabber.reset();

private:

    std::unique_ptr<Grabber> m_grabber;

    const QImage::Format m_imageFormat = QImage::Format_ARGB32;

    const QSize m_imageSize = QSize(2, 3);

};

QT_END_NAMESPACE

#endif // QMOCKSURFACECAPTURE_H