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 HOS_CAMERA_V4L2_BUFFER_H
17 #define HOS_CAMERA_V4L2_BUFFER_H
18 
19 #include <mutex>
20 #include <map>
21 #include <cstring>
22 #include <linux/videodev2.h>
23 #include <sys/ioctl.h>
24 #include <memory>
25 #include "v4l2_common.h"
26 #if defined(V4L2_UTEST) || defined (V4L2_MAIN_TEST)
27 #include "v4l2_temp.h"
28 #else
29 #include <stream.h>
30 #include <camera.h>
31 #endif
32 
33 namespace OHOS::Camera {
34 struct AdapterBuff {
35     void* start;
36     uint32_t length;
37     uint32_t offset;
38     void* userBufPtr;
39     int32_t heapfd;
40     int32_t dmafd;
41 };
42 class HosV4L2Buffers : public std::enable_shared_from_this<HosV4L2Buffers> {
43     // hide construct function
44     HosV4L2Buffers(enum v4l2_memory memType, enum v4l2_buf_type bufferType);
45 public:
CreateHosV4L2Buffers(enum v4l2_memory memType,enum v4l2_buf_type bufferType)46     static std::shared_ptr<HosV4L2Buffers> CreateHosV4L2Buffers(enum v4l2_memory memType,
47         enum v4l2_buf_type bufferType)
48     {
49         struct HosV4L2BuffersHelper : public HosV4L2Buffers {
50             HosV4L2BuffersHelper(enum v4l2_memory memType, enum v4l2_buf_type bufferType)
51                 : HosV4L2Buffers(memType, bufferType) {}
52         };
53         // online code commit rule requires using std::make_shared
54         return std::make_shared<HosV4L2BuffersHelper>(memType, bufferType);
55     }
56 
57     virtual ~HosV4L2Buffers();
58 
59     RetCode V4L2ReqBuffers(int fd, int unsigned buffCont);
60     RetCode V4L2ReleaseBuffers(int fd);
61 
62     RetCode V4L2QueueBuffer(int fd, const std::shared_ptr<FrameSpec>& frameSpec);
63     RetCode V4L2DequeueBuffer(int fd);
64 
65     RetCode V4L2AllocBuffer(int fd, const std::shared_ptr<FrameSpec>& frameSpec);
66 
67     void SetV4L2BuffersCallback(BufCallback cb);
68 
69     RetCode Flush(int fd);
70 
71 private:
72     RetCode SetAdapterBuffer(int fd, struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec);
73     RetCode SetDmabufOn(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec);
74     void MakeInqueueBuffer(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec);
75     void SetInqueueBuffer(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec);
76     void SetMmapInqueueBuffer(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec);
77     void SetDmaInqueueBuffer(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec);
78 
79 private:
80     BufCallback dequeueBuffer_;
81 
82     using FrameMap = std::map<unsigned int, std::shared_ptr<FrameSpec>>;
83     std::map<int, FrameMap> queueBuffers_;
84 
85     using AdapterBuffer = struct AdapterBuff;
86     std::map<uint32_t, AdapterBuffer> adapterBufferMap_;
87 
88     std::mutex bufferLock_;
89 
90     enum v4l2_memory memoryType_;
91     enum v4l2_buf_type bufferType_;
92 
93     uint32_t buffLong_;
94 };
95 } // namespace OHOS::Camera
96 #endif // HOS_CAMERA_V4L2_BUFFER_H
97