mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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b7fc75c883
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.
100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/*
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* GStreamer
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* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __QT_ITEM_H__
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#define __QT_ITEM_H__
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#include <gst/gst.h>
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#include <gst/gl/gl.h>
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#include "gstqtgl.h"
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#include <QtCore/QMutex>
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#include <QtQuick/QQuickItem>
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#include <QtGui/QOpenGLContext>
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#include <QtGui/QOpenGLFunctions>
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typedef struct _QtGLVideoItemPrivate QtGLVideoItemPrivate;
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class QtGLVideoItem;
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class QtGLVideoItemInterface : public QObject
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{
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Q_OBJECT
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public:
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QtGLVideoItemInterface (QtGLVideoItem *w) : qt_item (w), lock() {};
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void invalidateRef();
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void setBuffer (GstBuffer * buffer);
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gboolean setCaps (GstCaps *caps);
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gboolean initWinSys ();
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GstGLContext *getQtContext();
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GstGLContext *getContext();
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GstGLDisplay *getDisplay();
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QtGLVideoItem *videoItem () { return qt_item; };
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void setDAR(gint, gint);
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void getDAR(gint *, gint *);
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void setForceAspectRatio(bool);
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bool getForceAspectRatio();
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private:
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QtGLVideoItem *qt_item;
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QMutex lock;
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};
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class InitializeSceneGraph;
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class QtGLVideoItem : public QQuickItem, protected QOpenGLFunctions
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{
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Q_OBJECT
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public:
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QtGLVideoItem();
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~QtGLVideoItem();
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void setDAR(gint, gint);
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void getDAR(gint *, gint *);
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void setForceAspectRatio(bool);
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bool getForceAspectRatio();
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QSharedPointer<QtGLVideoItemInterface> getInterface() { return proxy; };
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/* private for C interface ... */
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QtGLVideoItemPrivate *priv;
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private Q_SLOTS:
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void handleWindowChanged(QQuickWindow * win);
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void onSceneGraphInitialized();
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void onSceneGraphInvalidated();
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protected:
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QSGNode * updatePaintNode (QSGNode * oldNode, UpdatePaintNodeData * updatePaintNodeData);
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private:
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friend class InitializeSceneGraph;
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void setViewportSize(const QSize &size);
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void shareContext();
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QSize m_viewportSize;
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bool m_openGlContextInitialized;
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QSharedPointer<QtGLVideoItemInterface> proxy;
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};
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#endif /* __QT_ITEM_H__ */
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