--- /dev/null
+/*
+ * 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 <utils/String8.h>
+#include <utils/Vector.h>
+
+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<int> mSubscribedCameraIds;
+ Vector<SubscriberInfo> 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