itsmattkc
53ae25a7cb
A huge optimization that ensures only the parts of a node graph that have changed get pushed to the renderer. For thread-safety, the node graph is copied elsewhere so that users can make changes asynchronously and the graph can update when its threads are ready. Up until now, if an input value changed, every node's values would be re-copied, or worse, if a connection was changed, the entire graph would be recopied. This has been negligible in testing since we've been largely testing with small graphs, but for massive projects, it's important that this be as optimized as possible.
152 lines
3.8 KiB
C++
152 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 BLOCK_H
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#define BLOCK_H
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#include "node/node.h"
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OLIVE_NAMESPACE_ENTER
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/**
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* @brief A Node that represents a block of time, also displayable on a Timeline
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*
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* This is an abstract function. Since different types of Block will provide their lengths in different ways, it's
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* necessary to subclass and override the length() function for a Block to be usable.
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*
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* When overriding Node::copy(), the derivative class should also call Block::CopyParameters() on the new Block instance
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* which will copy the block's name, length, and media in point. It does not copy any node-specific parameters like any
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* input values or connections as per standard with Node::copy().
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*/
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class Block : public Node
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{
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Q_OBJECT
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public:
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Block();
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enum Type {
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kClip,
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kGap,
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kTransition
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};
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virtual Type type() const = 0;
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virtual QString Category() const override;
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const rational& in() const;
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const rational& out() const;
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void set_in(const rational& in);
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void set_out(const rational& out);
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rational length() const;
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void set_length_and_media_out(const rational &length);
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void set_length_and_media_in(const rational &length);
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Block* previous();
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Block* next();
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void set_previous(Block* previous);
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void set_next(Block* next);
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rational media_in() const;
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void set_media_in(const rational& media_in);
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rational media_out() const;
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rational speed() const;
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void set_speed(const rational& speed);
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bool is_still() const;
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bool is_reversed() const;
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bool is_enabled() const;
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void set_enabled(bool e);
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QString block_name() const;
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void set_block_name(const QString& name);
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static bool Link(Block* a, Block* b);
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static void Link(const QList<Block*>& blocks);
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static bool Unlink(Block* a, Block* b);
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static void Unlink(const QList<Block*>& blocks);
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static bool AreLinked(Block* a, Block* b);
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const QVector<Block*>& linked_clips();
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bool HasLinks();
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virtual bool IsBlock() const override;
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virtual void Retranslate() override;
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NodeInput* length_input() const;
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NodeInput* media_in_input() const;
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NodeInput* speed_input() const;
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virtual void InvalidateCache(const TimeRange& range, NodeInput* from, NodeInput* source) override;
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public slots:
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signals:
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/**
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* @brief Signal emitted when this Block is refreshed
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*
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* Can be used as essentially a "changed" signal for UI widgets to know when to update their views
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*/
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void Refreshed();
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void LengthChanged(const rational& length);
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void LinksChanged();
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void NameChanged();
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void EnabledChanged();
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protected:
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rational SequenceToMediaTime(const rational& sequence_time) const;
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rational MediaToSequenceTime(const rational& media_time) const;
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virtual void LoadInternal(QXmlStreamReader* reader, XMLNodeData& xml_node_data) override;
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virtual void SaveInternal(QXmlStreamWriter* writer) const override;
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Block* previous_;
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Block* next_;
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private:
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NodeInput* name_input_;
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NodeInput* length_input_;
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NodeInput* media_in_input_;
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NodeInput* speed_input_;
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NodeInput* enabled_input_;
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rational in_point_;
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rational out_point_;
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QVector<Block*> linked_clips_;
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private slots:
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void LengthInputChanged();
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};
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OLIVE_NAMESPACE_EXIT
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#endif // BLOCK_H
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