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/*
* 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
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