125 lines
5.5 KiB
C++
125 lines
5.5 KiB
C++
/*
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* Copyright (C) 2022 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 CPP_EVS_MANAGER_AIDL_INCLUDE_VIRTUALCAMERA_H
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#define CPP_EVS_MANAGER_AIDL_INCLUDE_VIRTUALCAMERA_H
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#include <aidl/android/hardware/automotive/evs/BnEvsCamera.h>
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#include <aidl/android/hardware/automotive/evs/BufferDesc.h>
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#include <aidl/android/hardware/automotive/evs/CameraDesc.h>
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#include <aidl/android/hardware/automotive/evs/CameraParam.h>
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#include <aidl/android/hardware/automotive/evs/EvsEventDesc.h>
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#include <aidl/android/hardware/automotive/evs/EvsResult.h>
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#include <aidl/android/hardware/automotive/evs/IEvsCameraStream.h>
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#include <aidl/android/hardware/automotive/evs/IEvsDisplay.h>
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#include <aidl/android/hardware/automotive/evs/ParameterRange.h>
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#include <aidl/android/hardware/automotive/evs/Stream.h>
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#include <android-base/thread_annotations.h>
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#include <condition_variable>
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#include <deque>
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#include <set>
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#include <thread> // NO_LINT
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#include <unordered_map>
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namespace aidl::android::automotive::evs::implementation {
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namespace aidlevs = ::aidl::android::hardware::automotive::evs;
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class HalCamera; // From HalCamera.h
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// This class represents an EVS camera to the client application. As such it presents
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// the IEvsCamera interface, and also proxies the frame delivery to the client's
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// IEvsCameraStream object.
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class VirtualCamera : public ::aidl::android::hardware::automotive::evs::BnEvsCamera {
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public:
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// Methods from ::android::hardware::automotive::evs::IEvsCamera follow.
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::ndk::ScopedAStatus doneWithFrame(const std::vector<aidlevs::BufferDesc>& buffers) override;
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::ndk::ScopedAStatus forcePrimaryClient(
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const std::shared_ptr<aidlevs::IEvsDisplay>& display) override;
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::ndk::ScopedAStatus getCameraInfo(aidlevs::CameraDesc* _aidl_return) override;
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::ndk::ScopedAStatus getExtendedInfo(int32_t opaqueIdentifier,
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std::vector<uint8_t>* value) override;
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::ndk::ScopedAStatus getIntParameter(aidlevs::CameraParam id,
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std::vector<int32_t>* value) override;
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::ndk::ScopedAStatus getIntParameterRange(aidlevs::CameraParam id,
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aidlevs::ParameterRange* _aidl_return) override;
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::ndk::ScopedAStatus getParameterList(std::vector<aidlevs::CameraParam>* _aidl_return) override;
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::ndk::ScopedAStatus getPhysicalCameraInfo(const std::string& deviceId,
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aidlevs::CameraDesc* _aidl_return) override;
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::ndk::ScopedAStatus importExternalBuffers(const std::vector<aidlevs::BufferDesc>& buffers,
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int32_t* _aidl_return) override;
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::ndk::ScopedAStatus pauseVideoStream() override;
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::ndk::ScopedAStatus resumeVideoStream() override;
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::ndk::ScopedAStatus setExtendedInfo(int32_t opaqueIdentifier,
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const std::vector<uint8_t>& opaqueValue) override;
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::ndk::ScopedAStatus setIntParameter(aidlevs::CameraParam id, int32_t value,
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std::vector<int32_t>* effectiveValue) override;
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::ndk::ScopedAStatus setPrimaryClient() override;
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::ndk::ScopedAStatus setMaxFramesInFlight(int32_t bufferCount) override;
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::ndk::ScopedAStatus startVideoStream(
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const std::shared_ptr<aidlevs::IEvsCameraStream>& receiver) override;
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::ndk::ScopedAStatus stopVideoStream() override;
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::ndk::ScopedAStatus unsetPrimaryClient() override;
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explicit VirtualCamera(const std::vector<std::shared_ptr<HalCamera>>& halCameras);
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virtual ~VirtualCamera();
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unsigned getAllowedBuffers() { return mFramesAllowed; };
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bool isStreaming() {
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std::lock_guard lock(mMutex);
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return mStreamState == RUNNING;
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}
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std::vector<std::shared_ptr<HalCamera>> getHalCameras();
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void setDescriptor(aidlevs::CameraDesc* desc) { mDesc = desc; }
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// Proxy to receive frames and forward them to the client's stream
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bool notify(const aidlevs::EvsEventDesc& event);
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bool deliverFrame(const aidlevs::BufferDesc& bufDesc);
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// Dump current status to a given file descriptor
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std::string toString(const char* indent = "") const NO_THREAD_SAFETY_ANALYSIS;
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private:
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void shutdown();
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bool isLogicalCamera() const { return mHalCamera.size() > 1; }
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bool isValid() const { return !mHalCamera.empty(); }
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// The low level camera interface that backs this proxy
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std::unordered_map<std::string, std::weak_ptr<HalCamera>> mHalCamera;
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std::shared_ptr<aidlevs::IEvsCameraStream> mStream;
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unsigned mFramesAllowed = 1;
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enum {
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STOPPED,
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RUNNING,
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STOPPING,
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} mStreamState GUARDED_BY(mMutex) = STOPPED;
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std::unordered_map<std::string, std::deque<aidlevs::BufferDesc>> mFramesHeld;
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std::thread mCaptureThread;
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aidlevs::CameraDesc* mDesc;
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mutable std::mutex mMutex;
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std::condition_variable mFramesReadySignal;
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std::set<std::string> mSourceCameras;
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};
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} // namespace aidl::android::automotive::evs::implementation
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#endif // CPP_EVS_MANAGER_AIDL_INCLUDE_VIRTUALCAMERA_H
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