gstreamer/ext/qt/qtitem.h
Jan Schmidt b7fc75c883 qt: Use a proxy object for access to the QML widget
QML can destroy the video widget at any time, leaving
us with a dangling pointer. Use a lock and a proxy
object to cope with that, and block in the widget
destructor if there are ongoing calls into the widget.
2017-07-12 15:51:11 +10:00

100 lines
2.6 KiB
C++

/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __QT_ITEM_H__
#define __QT_ITEM_H__
#include <gst/gst.h>
#include <gst/gl/gl.h>
#include "gstqtgl.h"
#include <QtCore/QMutex>
#include <QtQuick/QQuickItem>
#include <QtGui/QOpenGLContext>
#include <QtGui/QOpenGLFunctions>
typedef struct _QtGLVideoItemPrivate QtGLVideoItemPrivate;
class QtGLVideoItem;
class QtGLVideoItemInterface : public QObject
{
Q_OBJECT
public:
QtGLVideoItemInterface (QtGLVideoItem *w) : qt_item (w), lock() {};
void invalidateRef();
void setBuffer (GstBuffer * buffer);
gboolean setCaps (GstCaps *caps);
gboolean initWinSys ();
GstGLContext *getQtContext();
GstGLContext *getContext();
GstGLDisplay *getDisplay();
QtGLVideoItem *videoItem () { return qt_item; };
void setDAR(gint, gint);
void getDAR(gint *, gint *);
void setForceAspectRatio(bool);
bool getForceAspectRatio();
private:
QtGLVideoItem *qt_item;
QMutex lock;
};
class InitializeSceneGraph;
class QtGLVideoItem : public QQuickItem, protected QOpenGLFunctions
{
Q_OBJECT
public:
QtGLVideoItem();
~QtGLVideoItem();
void setDAR(gint, gint);
void getDAR(gint *, gint *);
void setForceAspectRatio(bool);
bool getForceAspectRatio();
QSharedPointer<QtGLVideoItemInterface> getInterface() { return proxy; };
/* private for C interface ... */
QtGLVideoItemPrivate *priv;
private Q_SLOTS:
void handleWindowChanged(QQuickWindow * win);
void onSceneGraphInitialized();
void onSceneGraphInvalidated();
protected:
QSGNode * updatePaintNode (QSGNode * oldNode, UpdatePaintNodeData * updatePaintNodeData);
private:
friend class InitializeSceneGraph;
void setViewportSize(const QSize &size);
void shareContext();
QSize m_viewportSize;
bool m_openGlContextInitialized;
QSharedPointer<QtGLVideoItemInterface> proxy;
};
#endif /* __QT_ITEM_H__ */