qgstreamervideosource.cpp

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// Copyright (C) 2026 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
 
#include "qgstreamervideosource.h"
#include "qgstreamervideosource_p.h"
 
#include <QtMultimedia/private/qplatformcamera_p.h>
#include <QtMultimedia/private/qplatformmediaintegration_p.h>
 
#include <QtCore/qdebug.h>
 
QT_BEGIN_NAMESPACE
 
void QGStreamerVideoSourcePrivate::createPlatformCamera(QGStreamerVideoSource *source,
                                                        GstElementOrDescription elementOrDesc,
                                                        bool active)
{
    Q_ASSERT(!platformCamera);
 
    auto maybePlatformCamera = QPlatformMediaIntegration::instance()->createGStreamerVideoSource(
            source, elementOrDesc);
    if (!maybePlatformCamera) {
        qWarning() << "Failed to initialize QGStreamerVideoSource" << maybePlatformCamera.error();
        return;
    }
 
    if (auto gstBinDesc = std::get_if<QString>(&elementOrDesc))
        gstBinDescription = std::move(*gstBinDesc);
 
    platformCamera = *maybePlatformCamera;
 
    if (active)
        platformCamera->setActive(true);
 
    QObject::connect(platformCamera, &QPlatformVideoSource::activeChanged, source,
                     &QGStreamerVideoSource::activeChanged);
}
 
QGStreamerVideoSource::QGStreamerVideoSource(const QString &gstBinDescription, QObject *parent)
    : QGStreamerVideoSource(parent)
{
    Q_D(QGStreamerVideoSource);
    d->createPlatformCamera(this, gstBinDescription);
}
 
QGStreamerVideoSource::QGStreamerVideoSource(GstElement *gstElement, QObject *parent)
    : QGStreamerVideoSource(parent)
{
    Q_D(QGStreamerVideoSource);
    d->createPlatformCamera(this, gstElement);
}
 
QGStreamerVideoSource::QGStreamerVideoSource(QObject *parent)
    : QObject(*new QGStreamerVideoSourcePrivate, parent)
{
}
 
QGStreamerVideoSource::~QGStreamerVideoSource() = default;
 
bool QGStreamerVideoSource::isActive() const
{
    Q_D(const QGStreamerVideoSource);
    return d->platformCamera && d->platformCamera->isActive();
}
 
QString QGStreamerVideoSource::gstBinDescription() const
{
    Q_D(const QGStreamerVideoSource);
    return d->gstBinDescription;
}
 
GstElement *QGStreamerVideoSource::gstElement() const
{
    Q_D(const QGStreamerVideoSource);
    return d->platformCamera ? d->platformCamera->rawGstElement() : nullptr;
}
 
void QGStreamerVideoSource::setActive(bool active)
{
    Q_D(const QGStreamerVideoSource);
    if (d->platformCamera)
        d->platformCamera->setActive(active);
}
 
QPlatformCamera *QGStreamerVideoSource::platformVideoSource() const
{
    Q_D(const QGStreamerVideoSource);
    return d->platformCamera;
}
 
QMediaCaptureSession *QGStreamerVideoSource::captureSession() const
{
    Q_D(const QGStreamerVideoSource);
    return d->captureSession;
}
 
void QGStreamerVideoSource::setCaptureSession(QMediaCaptureSession *session)
{
    Q_D(QGStreamerVideoSource);
    d->captureSession = session;
}
 
QT_END_NAMESPACE