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activeframepool.h
1 /*
2 
3 Pencil2D - Traditional Animation Software
4 Copyright (C) 2005-2007 Patrick Corrieri & Pascal Naidon
5 Copyright (C) 2012-2020 Matthew Chiawen Chang
6 
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License
9 as published by the Free Software Foundation; version 2 of the License.
10 
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15 
16 */
17 
18 #ifndef ACTIVEFRAMEPOOL_H
19 #define ACTIVEFRAMEPOOL_H
20 
21 #include <list>
22 #include <unordered_map>
23 #include "keyframe.h"
24 
25 
34 {
35 public:
36  explicit ActiveFramePool();
37  virtual ~ActiveFramePool();
38 
39  void put(KeyFrame* key);
40  void clear();
41  void resize(quint64 memoryBudget);
42  bool isFrameInPool(KeyFrame*);
43  void setMinFrameCount(size_t frameCount);
44 
45  void onKeyFrameDestroy(KeyFrame*) override;
46 
47 private:
48  void discardLeastUsedFrames();
49  void unloadFrame(KeyFrame* key);
50  void recalcuateTotalUsedMemory();
51 
52  using list_iterator_t = std::list<KeyFrame*>::iterator;
53 
54  std::list<KeyFrame*> mCacheFramesList;
55  std::unordered_map<KeyFrame*, list_iterator_t> mCacheFramesMap;
56  quint64 mMemoryBudgetInBytes = 1024 * 1024 * 1024; // 1GB
57  quint64 mTotalUsedMemory = 0;
58  size_t mMinFrameCount = 15;
59 };
60 
61 #endif // ACTIVEFRAMEPOOL_H
ActiveFramePool implemented a LRU cache to keep tracking the most recent accessed key frames A key fr...