/* * Copyright (C) 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef HW_EMULATOR_CAMERA_EMULATED_CAMERA_HOTPLUG_H #define HW_EMULATOR_CAMERA_EMULATED_CAMERA_HOTPLUG_H /** * This class emulates hotplug events by inotifying on a file, specific * to a camera ID. When the file changes between 1/0 the hotplug * status goes between PRESENT and NOT_PRESENT. * * Refer to FAKE_HOTPLUG_FILE in EmulatedCameraHotplugThread.cpp */ #include "EmulatedCamera2.h" #include #include namespace android { class EmulatedCameraHotplugThread : public Thread { public: EmulatedCameraHotplugThread(const int* cameraIdArray, size_t size); ~EmulatedCameraHotplugThread(); virtual void requestExit(); virtual status_t requestExitAndWait(); private: virtual status_t readyToRun(); virtual bool threadLoop(); struct SubscriberInfo { int CameraID; int WatchID; }; bool addWatch(int cameraId); bool removeWatch(int cameraId); SubscriberInfo* getSubscriberInfo(int cameraId); int getCameraId(String8 filePath) const; int getCameraId(int wd) const; String8 getFilePath(int cameraId) const; int readFile(String8 filePath) const; bool createFileIfNotExists(int cameraId) const; int mInotifyFd; Vector mSubscribedCameraIds; Vector mSubscribers; // variables above are unguarded: // -- accessed in thread loop or in constructor only Mutex mMutex; bool mRunning; // guarding only when it's important }; } // namespace android #endif