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86 lines
3.2 KiB
86 lines
3.2 KiB
4 months ago
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/*
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* Copyright (C) 2021 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 ANDROID_CARSERVICE_STREAMHANDLER_H
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#define ANDROID_CARSERVICE_STREAMHANDLER_H
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#include "EvsServiceCallback.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/IEvsCameraStream.h>
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#include <android/hardware/automotive/evs/1.1/IEvsDisplay.h>
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#include <ui/GraphicBuffer.h>
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#include <list>
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namespace android {
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namespace automotive {
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namespace evs {
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/*
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* StreamHandler:
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* This class can be used to receive camera imagery from an IEvsCamera implementation. It will
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* hold onto the most recent image buffer, returning older ones.
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* Note that the video frames are delivered on a background thread, while the control interface
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* is actuated from the applications foreground thread.
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*/
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class StreamHandler : public android::hardware::automotive::evs::V1_1::IEvsCameraStream {
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public:
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StreamHandler(android::sp<android::hardware::automotive::evs::V1_1::IEvsCamera>& pCamera,
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EvsServiceCallback* callback, int maxNumFramesInFlight);
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virtual ~StreamHandler();
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void shutdown();
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bool startStream();
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bool asyncStopStream();
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void blockingStopStream();
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bool isRunning();
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void doneWithFrame(const android::hardware::automotive::evs::V1_1::BufferDesc& buffer);
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private:
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// Implementation for ::android::hardware::automotive::evs::V1_0::IEvsCameraStream
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android::hardware::Return<void> deliverFrame(
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const android::hardware::automotive::evs::V1_0::BufferDesc& buffer) override;
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// Implementation for ::android::hardware::automotive::evs::V1_1::IEvsCameraStream
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android::hardware::Return<void> deliverFrame_1_1(
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const android::hardware::hidl_vec<android::hardware::automotive::evs::V1_1::BufferDesc>&
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buffer) override;
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android::hardware::Return<void> notify(
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const android::hardware::automotive::evs::V1_1::EvsEventDesc& event) override;
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// Values initialized as startup
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android::sp<android::hardware::automotive::evs::V1_1::IEvsCamera> mEvsCamera;
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// Since we get frames delivered to us asnchronously via the ICarCameraStream interface,
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// we need to protect all member variables that may be modified while we're streaming
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// (ie: those below)
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std::mutex mLock;
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std::condition_variable mCondition;
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bool mRunning = false;
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// Callbacks to forward EVS events and frames
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EvsServiceCallback* mCallback;
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std::list<android::hardware::automotive::evs::V1_1::BufferDesc> mReceivedBuffers
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GUARDED_BY(mLock);
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int mMaxNumFramesInFlight;
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};
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} // namespace evs
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} // namespace automotive
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} // namespace android
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#endif // ANDROID_CARSERVICE_STREAMHANDLER_H
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