blob: 86c63b6d09d0d8b4e80e1edd3f7e1814e17c16ea
| 1 | /* |
| 2 | * Copyright (C) 2013 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef HW_EMULATOR_CAMERA_EMULATED_CAMERA_HOTPLUG_H |
| 18 | #define HW_EMULATOR_CAMERA_EMULATED_CAMERA_HOTPLUG_H |
| 19 | |
| 20 | /** |
| 21 | * This class emulates hotplug events by inotifying on a file, specific |
| 22 | * to a camera ID. When the file changes between 1/0 the hotplug |
| 23 | * status goes between PRESENT and NOT_PRESENT. |
| 24 | * |
| 25 | * Refer to FAKE_HOTPLUG_FILE in EmulatedCameraHotplugThread.cpp |
| 26 | */ |
| 27 | |
| 28 | #include "EmulatedCamera2.h" |
| 29 | #include <utils/String8.h> |
| 30 | #include <utils/Vector.h> |
| 31 | #include <sys/socket.h> |
| 32 | #include <linux/netlink.h> |
| 33 | |
| 34 | namespace android { |
| 35 | class EmulatedCameraHotplugThread : public Thread { |
| 36 | public: |
| 37 | EmulatedCameraHotplugThread(const int* cameraIdArray, size_t size); |
| 38 | ~EmulatedCameraHotplugThread(); |
| 39 | |
| 40 | virtual void requestExit(); |
| 41 | virtual status_t requestExitAndWait(); |
| 42 | |
| 43 | private: |
| 44 | |
| 45 | |
| 46 | virtual status_t readyToRun(); |
| 47 | virtual bool threadLoop(); |
| 48 | |
| 49 | struct SubscriberInfo { |
| 50 | int CameraID; |
| 51 | int WatchID; |
| 52 | }; |
| 53 | |
| 54 | bool addWatch(int cameraId); |
| 55 | bool removeWatch(int cameraId); |
| 56 | SubscriberInfo* getSubscriberInfo(int cameraId); |
| 57 | |
| 58 | int getCameraId(String8 filePath) const; |
| 59 | int getCameraId(int wd) const; |
| 60 | |
| 61 | String8 getFilePath(int cameraId) const; |
| 62 | int readFile(String8 filePath) const; |
| 63 | |
| 64 | bool createFileIfNotExists(int cameraId) const; |
| 65 | |
| 66 | int mInotifyFd; |
| 67 | Vector<int> mSubscribedCameraIds; |
| 68 | Vector<SubscriberInfo> mSubscribers; |
| 69 | |
| 70 | // variables above are unguarded: |
| 71 | // -- accessed in thread loop or in constructor only |
| 72 | |
| 73 | Mutex mMutex; |
| 74 | |
| 75 | bool mRunning; // guarding only when it's important |
| 76 | int mSocketFd; |
| 77 | struct sockaddr_nl sa; |
| 78 | }; |
| 79 | } // namespace android |
| 80 | |
| 81 | #endif |
| 82 |