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125 lines
4.0 KiB
125 lines
4.0 KiB
4 months ago
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/*
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* Copyright (C) 2016 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 CAR_EVS_APP_EVSSTATECONTROL_H
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#define CAR_EVS_APP_EVSSTATECONTROL_H
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#include "ConfigManager.h"
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#include "EvsStats.h"
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#include "RenderBase.h"
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#include "StreamHandler.h"
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#include <android/hardware/automotive/evs/1.1/IEvsCamera.h>
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#include <android/hardware/automotive/evs/1.1/IEvsDisplay.h>
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#include <android/hardware/automotive/evs/1.1/IEvsEnumerator.h>
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#include <android/hardware/automotive/vehicle/2.0/IVehicle.h>
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#include <thread>
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using namespace ::android::hardware::automotive::evs::V1_1;
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using namespace ::android::hardware::automotive::vehicle::V2_0;
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using ::android::hardware::Return;
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using ::android::hardware::Void;
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using ::android::hardware::hidl_vec;
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using ::android::hardware::hidl_handle;
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using ::android::sp;
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using ::android::hardware::automotive::evs::V1_1::IEvsDisplay;
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using ::android::hardware::camera::device::V3_2::Stream;
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/*
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* This class runs the main update loop for the EVS application. It will sleep when it has
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* nothing to do. It provides a thread safe way for other threads to wake it and pass commands
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* to it.
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*/
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class EvsStateControl {
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public:
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EvsStateControl(android::sp <IVehicle> pVnet,
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android::sp <IEvsEnumerator> pEvs,
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android::sp <IEvsDisplay> pDisplay,
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const ConfigManager& config);
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enum State {
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OFF = 0,
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REVERSE,
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LEFT,
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RIGHT,
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PARKING,
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NUM_STATES // Must come last
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};
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enum class Op {
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EXIT,
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CHECK_VEHICLE_STATE,
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TOUCH_EVENT,
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};
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struct Command {
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Op operation;
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uint32_t arg1;
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uint32_t arg2;
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};
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// This spawns a new thread that is expected to run continuously
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bool startUpdateLoop();
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// This stops a rendering thread
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void terminateUpdateLoop();
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// Safe to be called from other threads
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void postCommand(const Command& cmd, bool clear = false);
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private:
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void updateLoop();
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StatusCode invokeGet(VehiclePropValue *pRequestedPropValue);
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bool selectStateForCurrentConditions();
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bool configureEvsPipeline(State desiredState); // Only call from one thread!
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sp<IVehicle> mVehicle;
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sp<IEvsEnumerator> mEvs;
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sp<IEvsDisplay> mDisplay;
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const ConfigManager& mConfig;
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VehiclePropValue mGearValue;
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VehiclePropValue mTurnSignalValue;
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State mCurrentState = OFF;
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// mCameraList is a redundant storage for camera device info, which is also
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// stored in mCameraDescList and, however, not removed for backward
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// compatibility.
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std::vector<ConfigManager::CameraInfo> mCameraList[NUM_STATES];
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std::unique_ptr<RenderBase> mCurrentRenderer;
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std::unique_ptr<RenderBase> mDesiredRenderer;
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std::vector<CameraDesc> mCameraDescList[NUM_STATES];
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std::thread mRenderThread; // The thread that runs the main rendering loop
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// Other threads may want to spur us into action, so we provide a thread safe way to do that
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std::mutex mLock;
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std::condition_variable mWakeSignal;
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std::queue<Command> mCommandQueue;
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EvsStats mEvsStats; // Not thread-safe
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// True if the first frame displayed on the mCurrentRenderer. Resets to false when
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// mCurrentRenderer changes.
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bool mFirstFrameIsDisplayed;
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};
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#endif //CAR_EVS_APP_EVSSTATECONTROL_H
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