gstreamer/subprojects/gst-plugins-good/ext/qt/qtglrenderer.h

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/*
* GStreamer
* Copyright (C) 2020 Matthew Waters <matthew@cenricular.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_QUICK_RENDER_H__
#define __QT_QUICK_RENDER_H__
#include <QThread>
#include <QMutex>
#include <gst/gl/gl.h>
QT_FORWARD_DECLARE_CLASS(QOpenGLContext)
QT_FORWARD_DECLARE_CLASS(QOpenGLFramebufferObject)
QT_FORWARD_DECLARE_CLASS(QQuickRenderControl)
QT_FORWARD_DECLARE_CLASS(QQuickWindow)
QT_FORWARD_DECLARE_CLASS(QQmlEngine)
QT_FORWARD_DECLARE_CLASS(QQmlComponent)
QT_FORWARD_DECLARE_CLASS(QQuickItem)
QT_FORWARD_DECLARE_CLASS(GstAnimationDriver)
QT_FORWARD_DECLARE_CLASS(GstBackingSurface)
class GstQuickRenderer : public QObject
{
Q_OBJECT
public:
GstQuickRenderer();
~GstQuickRenderer();
/* initialize the GStreamer/Qt integration. On failure returns false
* and fills @error.
* Must be called with @context not wrapped and current in the current
* thread */
bool init (GstGLContext * context, GError ** error);
/* set the qml scene. returns false and fills @error on failure */
bool setQmlScene (const gchar * scene, GError ** error);
void setSize(int w, int h);
GstGLMemory *generateOutput(GstClockTime input_ns);
/* cleanup any resources. Any use of this object after calling this
* function may result in undefined behaviour */
void cleanup();
/* retrieve the rootItem from the qml scene. Only valid after
* setQmlScene() has been successfully called */
QQuickItem *rootItem() const;
private slots:
void initializeQml();
private:
void init();
void ensureFbo();
void updateSizes();
static void render_gst_gl_c (GstGLContext * context, GstQuickRenderer * self) { self->renderGstGL (); }
void renderGstGL ();
static void initialize_gst_gl_c (GstGLContext * context, GstQuickRenderer * self) { self->initializeGstGL (); }
void initializeGstGL ();
static void stop_c (GstGLContext * context, GstQuickRenderer * self) { self->stopGL (); }
void stopGL ();
static void activate_context_c (GstGLContext * context, GstQuickRenderer * self) { self->activateContext (); }
void activateContext ();
static void deactivate_context_c (GstGLContext * context, GstQuickRenderer * self) { self->deactivateContext (); }
void deactivateContext ();
GstGLContext *gl_context;
QOpenGLFramebufferObject *m_fbo;
QQuickWindow *m_quickWindow;
QQuickRenderControl *m_renderControl;
QQmlEngine *m_qmlEngine;
QQmlComponent *m_qmlComponent;
QQuickItem *m_rootItem;
GstGLBaseMemoryAllocator *gl_allocator;
GstGLAllocationParams *gl_params;
GstVideoInfo v_info;
GstGLMemory *gl_mem;
QString m_errorString;
struct SharedRenderData *m_sharedRenderData;
};
class CreateSurfaceWorker : public QObject
{
Q_OBJECT
public:
CreateSurfaceWorker (struct SharedRenderData * rdata);
~CreateSurfaceWorker ();
bool event(QEvent *ev) override;
private:
struct SharedRenderData *m_sharedRenderData;
};
#endif /* __QT_QUICK_RENDER_H__ */