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97 lines
3.6 KiB
97 lines
3.6 KiB
/*
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* Copyright (C) 2017 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 EVS_VTS_STREAMHANDLER_H
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#define EVS_VTS_STREAMHANDLER_H
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#include <queue>
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#include "ui/GraphicBuffer.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/IEvsCamera.h>
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#include <android/hardware/automotive/evs/1.1/IEvsDisplay.h>
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using namespace ::android::hardware::automotive::evs::V1_1;
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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 EvsDisplayState = ::android::hardware::automotive::evs::V1_0::DisplayState;
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using BufferDesc_1_0 = ::android::hardware::automotive::evs::V1_0::BufferDesc;
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using BufferDesc_1_1 = ::android::hardware::automotive::evs::V1_1::BufferDesc;
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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 IEvsCameraStream {
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public:
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virtual ~StreamHandler() { shutdown(); };
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StreamHandler(android::sp <IEvsCamera> pCamera,
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uint32_t numBuffers = 2,
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bool useOwnBuffers = false,
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android_pixel_format_t format = HAL_PIXEL_FORMAT_RGBA_8888,
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int32_t width = 640,
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int32_t height = 360);
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void shutdown();
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bool startStream();
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void asyncStopStream();
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void blockingStopStream();
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bool isRunning();
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bool newFrameAvailable();
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const BufferDesc_1_1& getNewFrame();
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void doneWithFrame(const BufferDesc_1_1& buffer);
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private:
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// Implementation for ::android::hardware::automotive::evs::V1_0::IEvsCameraStream
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Return<void> deliverFrame(const BufferDesc_1_0& buffer) override;
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// Implementation for ::android::hardware::automotive::evs::V1_1::IEvsCameraStream
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Return<void> deliverFrame_1_1(const hidl_vec<BufferDesc_1_1>& buffer) override;
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Return<void> notify(const EvsEventDesc& event) override;
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// Values initialized as startup
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android::sp <IEvsCamera> mCamera;
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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 mSignal;
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bool mRunning = false;
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BufferDesc mBuffers[2];
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int mHeldBuffer = -1; // Index of the one currently held by the client
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int mReadyBuffer = -1; // Index of the newest available buffer
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hidl_vec<BufferDesc_1_1> mOwnBuffers;
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bool mUseOwnBuffers;
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};
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#endif //EVS_VTS_STREAMHANDLER_H
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