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