160 lines
3.8 KiB
C++
160 lines
3.8 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#ifndef RENDERER_H
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#define RENDERER_H
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#include <QOpenGLTexture>
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#include "node/node.h"
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#include "render/pixelformat.h"
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#include "render/rendermodes.h"
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#include "rendererthread.h"
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/**
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* @brief A multithreaded OpenGL based renderer for node systems
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*/
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class RendererProcessor : public Node
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{
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Q_OBJECT
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public:
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/**
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* @brief Renderer Constructor
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*
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* Constructing a Renderer object will not start any threads/backend on its own. Use Start() to do this and Stop()
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* when the Renderer is about to be destroyed.
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*/
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RendererProcessor();
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virtual QString Name() override;
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virtual QString Category() override;
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virtual QString Description() override;
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virtual QString id() override;
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void SetCacheName(const QString& s);
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virtual void Release() override;
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virtual void InvalidateCache(const rational &start_range, const rational &end_range) override;
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void SetTimebase(const rational& timebase);
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/**
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* @brief Set parameters of the Renderer
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*
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* The Renderer owns the buffers that are used in the rendering process and this function sets the kind of buffers
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* to use. The Renderer must be stopped when calling this function.
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*
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* @param width
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*
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* Buffer width
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*
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* @param height
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*
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* Buffer height
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*
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* @param format
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*
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* Buffer pixel format
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*/
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void SetParameters(const int& width,
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const int& height,
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const olive::PixelFormat& format,
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const olive::RenderMode& mode);
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/**
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* @brief Return current instance of a RenderThread (or nullptr if there is none)
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*
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* This function attempts a dynamic_cast on QThread::currentThread() to RendererThread, which will return nullptr if
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* the cast fails (e.g. if this function is called from the main thread rather than a RendererThread).
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*/
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static RendererThread* CurrentThread();
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static RenderInstance* CurrentInstance();
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NodeInput* texture_input();
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NodeOutput* texture_output();
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protected:
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virtual void Process(const rational &time) override;
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private:
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/**
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* @brief Allocate and start the multithreaded backend
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*/
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void Start();
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/**
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* @brief Terminate and deallocate the multithreaded backend
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*/
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void Stop();
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/**
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* @brief Internal function for generating the cache ID
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*/
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void GenerateCacheIDInternal();
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/**
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* @brief Function called when there are frames in the queue to cache
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*
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* This function is NOT thread-safe and should only be called in the main thread.
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*/
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void CacheNext();
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/**
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* @brief Internal list of RenderThreads
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*/
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QVector<RendererThreadPtr> threads_;
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/**
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* @brief Internal variable that contains whether the Renderer has started or not
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*/
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bool started_;
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NodeInput* texture_input_;
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NodeOutput* texture_output_;
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int width_;
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int height_;
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olive::PixelFormat format_;
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olive::RenderMode mode_;
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rational timebase_;
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double timebase_dbl_;
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QVector<rational> cache_queue_;
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QString cache_name_;
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qint64 cache_time_;
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QString cache_id_;
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bool caching_;
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int cache_return_count_;
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private slots:
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void ThreadCallback();
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};
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#endif // RENDERER_H
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