qt-everywhere-src-5.14.1/qtmultimedia/src/gsttools/qgstvideorendererplugin_p.h

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#ifndef QGSTVIDEORENDERERPLUGIN_P_H
#define QGSTVIDEORENDERERPLUGIN_P_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 <private/qgsttools_global_p.h>
#include <qabstractvideobuffer.h>
#include <qvideosurfaceformat.h>
#include <QtCore/qobject.h>
#include <QtCore/qplugin.h>

#include <gst/gst.h>

QT_BEGIN_NAMESPACE

class QAbstractVideoSurface;

const QLatin1String QGstVideoRendererPluginKey("gstvideorenderer");

class Q_GSTTOOLS_EXPORT QGstVideoRenderer
{
public:
    virtual ~QGstVideoRenderer() {}

    virtual GstCaps *getCaps(QAbstractVideoSurface *surface) = 0;
    virtual bool start(QAbstractVideoSurface *surface, GstCaps *caps) = 0;
    virtual void stop(QAbstractVideoSurface *surface) = 0;  // surface may be null if unexpectedly deleted.
    virtual bool proposeAllocation(GstQuery *query) = 0;    // may be called from a thread.

    virtual bool present(QAbstractVideoSurface *surface, GstBuffer *buffer) = 0;
    virtual void flush(QAbstractVideoSurface *surface) = 0; // surface may be null if unexpectedly deleted.
};

/*
    Abstract interface for video buffers allocation.
*/
class Q_GSTTOOLS_EXPORT QGstVideoRendererInterface
{
public:
    virtual ~QGstVideoRendererInterface() {}

    virtual QGstVideoRenderer *createRenderer() = 0;
};

#define QGstVideoRendererInterface_iid "org.qt-project.qt.gstvideorenderer/5.4"
Q_DECLARE_INTERFACE(QGstVideoRendererInterface, QGstVideoRendererInterface_iid)

class Q_GSTTOOLS_EXPORT QGstVideoRendererPlugin : public QObject, public QGstVideoRendererInterface
{
    Q_OBJECT
    Q_INTERFACES(QGstVideoRendererInterface)
public:
    explicit QGstVideoRendererPlugin(QObject *parent = 0);
    virtual ~QGstVideoRendererPlugin() {}

    QGstVideoRenderer *createRenderer() override = 0;

};

QT_END_NAMESPACE

#endif