mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 11:11:08 +00:00
41ad50fb48
allow dropping depth/stencil buffer for qmlgloverlay element. Shows considerable drop in memory bandwidth consumption of the element on windows platforms. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7677>
122 lines
3.8 KiB
C++
122 lines
3.8 KiB
C++
/*
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* GStreamer
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* Copyright (C) 2020 Matthew Waters <matthew@cenricular.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_QUICK_RENDER_H__
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#define __QT_QUICK_RENDER_H__
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#include <QThread>
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#include <QMutex>
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#include <gst/gl/gl.h>
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QT_FORWARD_DECLARE_CLASS(QOpenGLContext)
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QT_FORWARD_DECLARE_CLASS(QOpenGLFramebufferObject)
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QT_FORWARD_DECLARE_CLASS(QQuickRenderControl)
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QT_FORWARD_DECLARE_CLASS(QQuickWindow)
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QT_FORWARD_DECLARE_CLASS(QQmlEngine)
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QT_FORWARD_DECLARE_CLASS(QQmlComponent)
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QT_FORWARD_DECLARE_CLASS(QQuickItem)
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QT_FORWARD_DECLARE_CLASS(GstAnimationDriver)
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QT_FORWARD_DECLARE_CLASS(GstBackingSurface)
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class GstQuickRenderer : public QObject
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{
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Q_OBJECT
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public:
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GstQuickRenderer();
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~GstQuickRenderer();
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/* initialize the GStreamer/Qt integration and determine wether to attach depth/stencil buffer to fbo. On failure
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* returns false and fills @error. Must be called with @context not wrapped and current in the current thread
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*/
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bool init (GstGLContext * context, const gboolean use_depth_buffer, GError ** error);
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/* set the qml scene. returns false and fills @error on failure */
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bool setQmlScene (const gchar * scene, GError ** error);
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void setSize(int w, int h);
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GstGLMemory *generateOutput(GstClockTime input_ns);
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/* cleanup any resources. Any use of this object after calling this
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* function may result in undefined behaviour */
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void cleanup();
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/* retrieve the rootItem from the qml scene. Only valid after
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* setQmlScene() has been successfully called */
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QQuickItem *rootItem() const;
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private slots:
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void initializeQml();
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private:
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void init();
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void ensureFbo();
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void updateSizes();
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static void render_gst_gl_c (GstGLContext * context, GstQuickRenderer * self) { self->renderGstGL (); }
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void renderGstGL ();
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static void initialize_gst_gl_c (GstGLContext * context, GstQuickRenderer * self) { self->initializeGstGL (); }
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void initializeGstGL ();
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static void stop_c (GstGLContext * context, GstQuickRenderer * self) { self->stopGL (); }
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void stopGL ();
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static void activate_context_c (GstGLContext * context, GstQuickRenderer * self) { self->activateContext (); }
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void activateContext ();
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static void deactivate_context_c (GstGLContext * context, GstQuickRenderer * self) { self->deactivateContext (); }
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void deactivateContext ();
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GstGLContext *gl_context;
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QOpenGLFramebufferObject *m_fbo;
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QQuickWindow *m_quickWindow;
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QQuickRenderControl *m_renderControl;
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QQmlEngine *m_qmlEngine;
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QQmlComponent *m_qmlComponent;
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QQuickItem *m_rootItem;
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GstGLBaseMemoryAllocator *gl_allocator;
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GstGLAllocationParams *gl_params;
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GstVideoInfo v_info;
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GstGLMemory *gl_mem;
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gboolean m_useDepthBuffer;
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QString m_errorString;
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struct SharedRenderData *m_sharedRenderData;
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};
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class CreateSurfaceWorker : public QObject
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{
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Q_OBJECT
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public:
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CreateSurfaceWorker (struct SharedRenderData * rdata);
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~CreateSurfaceWorker ();
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bool event(QEvent *ev) override;
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private:
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struct SharedRenderData *m_sharedRenderData;
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};
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#endif /* __QT_QUICK_RENDER_H__ */
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