1 /*
2  * Copyright (C) 2021 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 INCREMENTAL_PIXEL_MAP_H
17 #define INCREMENTAL_PIXEL_MAP_H
18 
19 #include "nocopyable.h"
20 #include "image_type.h"
21 #include "pixel_map.h"
22 #include "peer_listener.h"
23 
24 namespace OHOS {
25 namespace Media {
26 class ImageSource;
27 
28 enum class IncrementalDecodingState : int32_t {
29     UNRESOLVED = 0,
30     BASE_INFO_ERROR = 1,
31     BASE_INFO_PARSED = 2,
32     IMAGE_DECODING = 3,
33     IMAGE_ERROR = 4,
34     PARTIAL_IMAGE = 5,
35     IMAGE_DECODED = 6
36 };
37 
38 struct IncrementalDecodingStatus {
39     static constexpr uint8_t FULL_PROGRESS = 100;
40     IncrementalDecodingState state = IncrementalDecodingState::UNRESOLVED;
41     uint32_t errorDetail = 0;
42     uint8_t decodingProgress = 0;
43 };
44 
45 class IncrementalPixelMap : public PixelMap, public PeerListener {
46 public:
47     IncrementalPixelMap() = delete;
48     ~IncrementalPixelMap() override;
49     uint32_t PromoteDecoding(uint8_t &decodeProgress);
50     void DetachFromDecoding();
51     const IncrementalDecodingStatus &GetDecodingStatus();
52 
53 private:
54     // declare friend class, only ImageSource can create IncrementalPixelMap object.
55     friend class ImageSource;
56     DISALLOW_COPY_AND_MOVE(IncrementalPixelMap);
57     IncrementalPixelMap(uint32_t index, const DecodeOptions opts, ImageSource *imageSource);
58     void OnPeerDestory() override;
59     void DetachSource();
60     IncrementalDecodingStatus decodingStatus_;
61     uint32_t index_ = 0;
62     DecodeOptions opts_;
63     ImageSource *imageSource_ = nullptr;
64 };
65 } // namespace Media
66 } // namespace OHOS
67 
68 #endif // INCREMENTAL_PIXEL_MAP_H
69