1 /*
2  * Copyright (c) 2022-2022 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 HISTREAMER_PLUGIN_COMMON_SHARE_MEMORY_H
17 #define HISTREAMER_PLUGIN_COMMON_SHARE_MEMORY_H
18 
19 #if !defined(OHOS_LITE) && defined(VIDEO_SUPPORT)
20 
21 #include "plugin/common/plugin_buffer.h"
22 #include "plugin/common/share_allocator.h"
23 
24 namespace OHOS {
25 namespace Media {
26 namespace Plugin {
27 class ShareMemory : public Memory {
28 public:
29     ~ShareMemory() override;
30 
31     explicit ShareMemory(size_t capacity, std::shared_ptr<Allocator> allocator = nullptr, size_t align = 1);
32 
33     size_t Write(const uint8_t* in, size_t writeSize, size_t position) override;
34 
35     size_t Read(uint8_t* out, size_t readSize, size_t position) override;
36 
37     int GetShareMemoryFd();
38 
39 protected:
40     uint8_t* GetRealAddr() const override;
41 
42 private:
43     void InitShareMemory(ShareMemType type);
44 
45     /// share buffer
46     std::shared_ptr<Ashmem> sharedMem_ {nullptr};
47 
48     std::shared_ptr<ShareAllocator> shareAllocator_ {nullptr};
49 
50     int fd_ = -1;
51 };
52 } // namespace Plugin
53 } // namespace Media
54 } // namespace OHOS
55 
56 #endif
57 #endif // HISTREAMER_PLUGIN_COMMON_SHARE_MEMORY_H
58