1 /*
2  * Copyright (c) 2023-2023 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef OHOS_CAMERA_DPS_VIDEO_JOB_QUEUE_H
17 #define OHOS_CAMERA_DPS_VIDEO_JOB_QUEUE_H
18 
19 #include "deferred_video_job.h"
20 
21 namespace OHOS {
22 namespace CameraStandard {
23 namespace DeferredProcessing {
24 constexpr uint32_t DEFAULT = 0;
25 class VideoJobQueue {
26 public:
27     typedef std::function<bool(DeferredVideoJobPtr, DeferredVideoJobPtr)> Comparator;
28     explicit VideoJobQueue(Comparator comp);
29     ~VideoJobQueue();
30 
31     bool Contains(DeferredVideoJobPtr obj) const;
32     DeferredVideoJobPtr Peek() const;
33     void Push(DeferredVideoJobPtr obj);
34     DeferredVideoJobPtr Pop();
35     void Remove(DeferredVideoJobPtr obj);
36     void Update(DeferredVideoJobPtr obj);
37     std::vector<DeferredVideoJobPtr> GetAllElements() const;
38     void Clear();
39 
IsEmpty()40     inline bool IsEmpty()
41     {
42         return size_ == DEFAULT;
43     }
44 
GetSize()45     inline int32_t GetSize()
46     {
47         DP_DEBUG_LOG("entered, size is %{public}d", size_);
48         return size_;
49     }
50 
51 private:
52     void HeapInsert(uint32_t index);
53     void Heapify(uint32_t index);
54     void Swap(uint32_t x, uint32_t y);
55 
56     uint32_t size_ {0};
57     Comparator comp_;
58     std::vector<DeferredVideoJobPtr> heap_ {};
59     std::unordered_map<DeferredVideoJobPtr, uint32_t> indexMap_ {};
60 };
61 } // namespace DeferredProcessing
62 } // namespace CameraStandard
63 } // namespace OHOS
64 #endif // OHOS_CAMERA_DPS_VIDEO_JOB_QUEUE_H