ext/qt/qtitem.h

/*
 * 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 <QtQuick/QQuickItem>
#include <QtGui/QOpenGLContext>
#include <QtGui/QOpenGLFunctions>

typedef struct _QtGLVideoItemPrivate QtGLVideoItemPrivate;

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();

    /* 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;
};

extern "C"
{
void            qt_item_set_buffer (QtGLVideoItem * widget, GstBuffer * buffer);
gboolean        qt_item_set_caps (QtGLVideoItem * widget, GstCaps * caps);
gboolean        qt_item_init_winsys (QtGLVideoItem * widget);
GstGLContext *  qt_item_get_qt_context (QtGLVideoItem * qt_item);
GstGLContext *  qt_item_get_context (QtGLVideoItem * qt_item);
GstGLDisplay *  qt_item_get_display (QtGLVideoItem * qt_item);
}

#endif /* __QT_ITEM_H__ */