140 lines
4.0 KiB
C++
140 lines
4.0 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 VIDEORENDERERBACKEND_H
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#define VIDEORENDERERBACKEND_H
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#include <QLinkedList>
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#include "colorprocessorcache.h"
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#include "node/output/viewer/viewer.h"
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#include "renderbackend.h"
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#include "render/pixelformat.h"
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#include "render/rendermodes.h"
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#include "videorenderframecache.h"
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#include "videorenderworker.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 VideoRenderBackend : public RenderBackend
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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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VideoRenderBackend(QObject* parent = nullptr);
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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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void SetParameters(const VideoRenderingParams ¶ms);
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void SetOperatingMode(const VideoRenderWorker::OperatingMode& mode);
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void SetOnlySignalLastFrameRequested(bool enabled);
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bool IsRendered(const rational& time) const;
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VideoRenderFrameCache* frame_cache();
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const VideoRenderingParams& params() const;
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protected:
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/**
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* @brief Allocate and start the multithreaded backend
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*/
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virtual bool InitInternal() override;
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/**
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* @brief Terminate and deallocate the multithreaded backend
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*/
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virtual void CloseInternal() override;
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struct HashTimeMapping {
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rational time;
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QByteArray hash;
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};
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virtual void ConnectViewer(ViewerOutput* node) override;
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virtual void DisconnectViewer(ViewerOutput* node) override;
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const char *GetCachedFrame(const rational& time);
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virtual NodeInput* GetDependentInput() override;
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virtual bool CanRender() override;
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virtual TimeRange PopNextFrameFromQueue() override;
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/**
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* @brief Internal function for generating the cache ID
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*/
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virtual bool GenerateCacheIDInternal(QCryptographicHash& hash) override;
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virtual void CacheIDChangedEvent(const QString& id) override;
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virtual void ConnectWorkerToThis(RenderWorker* processor) override;
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virtual void EmitCachedFrameReady(const rational &time, const QVariant& value, qint64 job_time) = 0;
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VideoRenderWorker::OperatingMode operating_mode_;
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signals:
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void CachedFrameReady(const rational& time, QVariant value, qint64 job_time);
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void CachedTimeReady(const rational& time, qint64 job_time);
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private:
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bool TimeIsQueued(const TimeRange &time) const;
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bool JobIsCurrent(const NodeDependency &dep, const qint64& job_time) const;
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bool SetFrameHash(const NodeDependency& dep, const QByteArray& hash, const qint64& job_time);
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VideoRenderingParams params_;
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QByteArray cache_frame_load_buffer_;
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VideoRenderFrameCache frame_cache_;
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rational last_time_requested_;
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bool only_signal_last_frame_requested_;
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private slots:
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void ThreadCompletedFrame(NodeDependency path, qint64 job_time, QByteArray hash, QVariant value);
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void ThreadCompletedDownload(NodeDependency dep, qint64 job_time, QByteArray hash);
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void ThreadSkippedFrame(NodeDependency dep, qint64 job_time, QByteArray hash);
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void ThreadHashAlreadyExists(NodeDependency dep, qint64 job_time, QByteArray hash);
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void TruncateFrameCacheLength(const rational& length);
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};
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#endif // VIDEORENDERERBACKEND_H
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