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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
#include "qvideosink.h"
#include "qvideoframeformat.h"
#include "qvideoframe.h"
#include "qmediaplayer.h"
#include "qmediacapturesession.h"
#include <qvariant.h>
#include <qpainter.h>
#include <qmatrix4x4.h>
#include <QDebug>
#include <private/qplatformmediaintegration_p.h>
#include <private/qplatformvideosink_p.h>
QT_BEGIN_NAMESPACE
class QVideoSinkPrivate {
public:
QVideoSinkPrivate(QVideoSink *q)
: q_ptr(q)
{
auto maybeVideoSink = QPlatformMediaIntegration::instance()->createVideoSink(q);
if (maybeVideoSink) {
videoSink = maybeVideoSink.value();
} else {
qWarning() << "Failed to create QVideoSink" << maybeVideoSink.error();
}
}
~QVideoSinkPrivate()
{
delete videoSink;
}
void unregisterSource()
{
if (!source)
return;
auto *old = source;
source = nullptr;
if (auto *player = qobject_cast<QMediaPlayer *>(old))
player->setVideoSink(nullptr);
else if (auto *capture = qobject_cast<QMediaCaptureSession *>(old))
capture->setVideoSink(nullptr);
}
QVideoSink *q_ptr = nullptr;
QPlatformVideoSink *videoSink = nullptr;
QObject *source = nullptr;
QRhi *rhi = nullptr;
};
/*!
\class QVideoSink
\brief The QVideoSink class represents a generic sink for video data.
\inmodule QtMultimedia
\ingroup multimedia
\ingroup multimedia_video
The QVideoSink class can be used to retrieve video data on a frame by frame
basis from Qt Multimedia.
QVideoSink will provide individual video frames to the application developer
through the videoFrameChanged() signal.
The video frame can then be used to read out the data of those frames and handle them
further. When using QPainter, the QVideoFrame can be drawing using the paint() method
in QVideoSink.
QVideoFrame objects can consume a significant amount of memory or system resources and
should thus not be held for longer than required by the application.
\sa QMediaPlayer, QMediaCaptureSession
*/
/*!
Constructs a new QVideoSink object with \a parent.
*/
QVideoSink::QVideoSink(QObject *parent)
: QObject(parent),
d(new QVideoSinkPrivate(this))
{
qRegisterMetaType<QVideoFrame>();
}
/*!
Destroys the object.
*/
QVideoSink::~QVideoSink()
{
disconnect(this);
d->unregisterSource();
delete d;
}
/*!
Returns the QRhi instance being used to create texture data in the video frames.
*/
QRhi *QVideoSink::rhi() const
{
return d->rhi;
}
/*!
\internal
Sets the QRhi instance being used to create texture data in the video frames
to \a rhi.
*/
void QVideoSink::setRhi(QRhi *rhi)
{
if (d->rhi == rhi)
return;
d->rhi = rhi;
if (d->videoSink)
d->videoSink->setRhi(rhi);
}
/*!
\internal
*/
QPlatformVideoSink *QVideoSink::platformVideoSink() const
{
return d->videoSink;
}
/*!
Returns the current video frame.
*/
QVideoFrame QVideoSink::videoFrame() const
{
return d->videoSink ? d->videoSink->currentVideoFrame() : QVideoFrame{};
}
/*!
\fn void QVideoSink::videoFrameChanged(const QVideoFrame &frame) const
Signals when the video \a frame changes.
*/
/*!
Sets the current video \a frame.
*/
void QVideoSink::setVideoFrame(const QVideoFrame &frame)
{
if (d->videoSink)
d->videoSink->setVideoFrame(frame);
}
/*!
\property QVideoSink::subtitleText
Returns the current subtitle text.
*/
QString QVideoSink::subtitleText() const
{
return d->videoSink ? d->videoSink->subtitleText() : QString{};
}
/*!
Sets the current \a subtitle text.
*/
void QVideoSink::setSubtitleText(const QString &subtitle)
{
if (d->videoSink)
d->videoSink->setSubtitleText(subtitle);
}
/*!
\property QVideoSink::videoSize
Returns the size of the video currently being played back. If no video is
being played, this method returns an invalid size.
*/
QSize QVideoSink::videoSize() const
{
return d->videoSink ? d->videoSink->nativeSize() : QSize{};
}
void QVideoSink::setSource(QObject *source)
{
if (d->source == source)
return;
if (source)
d->unregisterSource();
d->source = source;
}
QT_END_NAMESPACE
#include "moc_qvideosink.cpp"
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