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 #ifndef HOS_CAMERA_V4L2_UVC_H
16 #define HOS_CAMERA_V4L2_UVC_H
17 
18 #include <thread>
19 #include <fcntl.h>
20 #include <linux/netlink.h>
21 #include <linux/videodev2.h>
22 #include <sys/ioctl.h>
23 #include <sys/select.h>
24 #include <sys/socket.h>
25 #include <unistd.h>
26 #include <sys/eventfd.h>
27 #include <map>
28 #include "v4l2_common.h"
29 #if defined(V4L2_UTEST) || defined (V4L2_MAIN_TEST)
30 #include "v4l2_temp.h"
31 #else
32 #include <camera.h>
33 #endif
34 
35 namespace OHOS::Camera {
36 class HosV4L2UVC {
37 public:
38     HosV4L2UVC();
39     ~HosV4L2UVC();
40 
41     RetCode V4L2UvcDetectInit(UvcCallback cb);
42     void V4L2UvcDetectUnInit();
43 
44 private:
45     void V4L2UvcSearchCapability(const std::string devName, const std::string v4l2Device, bool inOut);
46     RetCode V4L2UvcGetCap(const std::string v4l2Device, struct v4l2_capability& cap);
47     int V4L2SprintfDev(std::pair<std::map<std::string, std::string>::iterator, bool> &iter,
48         char* devName, const std::string v4l2Device, uint32_t devNameSize);
49     void V4L2UvcMatchDev(const std::string      name, const std::string v4l2Device, bool inOut);
50     void V4L2UvcEnmeDevices();
51     void loopUvcDevice();
52     int CheckBuf(unsigned int len, char *buf);
53     void UpdateV4L2UvcMatchDev(std::string& action, std::string& subsystem, std::string& devnode);
54     const char* V4L2GetUsbValue(const char* key, const char* str, int len);
55     void V4L2GetUsbString(std::string& action, std::string& subsystem,
56         std::string& devnode, char* buf, unsigned int len);
57     RetCode V4L2UVCGetCapability(int fd, const std::string devName, std::string& cameraId);
58 
59     int uDevFd_ = -1;
60     int eventFd_ = -1;
61     int uvcDetectEnable_ = 0;
62 
63     UvcCallback uvcCallbackFun_ = nullptr;
64 
65     std::vector<DeviceControl> control_;
66     std::vector<DeviceFormat> format_;
67 
68     std::thread* uvcDetectThread_ = nullptr;
69 };
70 } // namespace OHOS::Camera
71 
72 #endif // HOS_CAMERA_V4L2_UVC_H
73