161 lines
7.0 KiB
C++
161 lines
7.0 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_SAMPLEDRIVER_AIDL_INCLUDE_EVSV4LCAMERA_H
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#define CPP_EVS_SAMPLEDRIVER_AIDL_INCLUDE_EVSV4LCAMERA_H
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#include "ConfigManager.h"
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#include "VideoCapture.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/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/result.h>
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#include <android/hardware_buffer.h>
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#include <ui/GraphicBuffer.h>
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#include <functional>
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#include <thread>
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namespace aidl::android::hardware::automotive::evs::implementation {
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namespace aidlevs = ::aidl::android::hardware::automotive::evs;
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class EvsV4lCamera : public ::aidl::android::hardware::automotive::evs::BnEvsCamera {
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public:
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// Methods from ::android::hardware::automotive::aidlevs::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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static std::shared_ptr<EvsV4lCamera> Create(const char* deviceName);
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static std::shared_ptr<EvsV4lCamera> Create(const char* deviceName,
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std::unique_ptr<ConfigManager::CameraInfo>& camInfo,
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const aidlevs::Stream* streamCfg = nullptr);
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EvsV4lCamera(const EvsV4lCamera&) = delete;
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EvsV4lCamera& operator=(const EvsV4lCamera&) = delete;
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virtual ~EvsV4lCamera() override;
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void shutdown();
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const aidlevs::CameraDesc& getDesc() { return mDescription; }
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// Dump captured frames to the filesystem
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::android::base::Result<void> startDumpFrames(const std::string& path);
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::android::base::Result<void> stopDumpFrames();
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// Constructors
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EvsV4lCamera(const char* deviceName, std::unique_ptr<ConfigManager::CameraInfo>& camInfo);
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private:
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// These three functions are expected to be called while mAccessLock is held
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bool setAvailableFrames_Locked(unsigned bufferCount);
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unsigned increaseAvailableFrames_Locked(unsigned numToAdd);
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unsigned decreaseAvailableFrames_Locked(unsigned numToRemove);
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void forwardFrame(imageBuffer* tgt, void* data);
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inline bool convertToV4l2CID(aidlevs::CameraParam id, uint32_t& v4l2cid);
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// The callback used to deliver each frame
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std::shared_ptr<aidlevs::IEvsCameraStream> mStream;
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// Interface to the v4l device
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VideoCapture mVideo = {};
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// The properties of this camera
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aidlevs::CameraDesc mDescription = {};
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uint32_t mFormat = 0; // Values from android_pixel_format_t
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uint32_t mUsage = 0; // Values from from Gralloc.h
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uint32_t mStride = 0; // Pixels per row (may be greater than image width)
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struct BufferRecord {
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buffer_handle_t handle;
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bool inUse;
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explicit BufferRecord(buffer_handle_t h) : handle(h), inUse(false){};
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};
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// Graphics buffers to transfer images
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std::vector<BufferRecord> mBuffers;
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// How many buffers are we currently using
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unsigned mFramesAllowed;
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// How many buffers are currently outstanding
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unsigned mFramesInUse;
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std::set<uint32_t> mCameraControls; // Available camera controls
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// Which format specific function we need to use to move camera imagery into our output buffers
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void (*mFillBufferFromVideo)(const aidlevs::BufferDesc& tgtBuff, uint8_t* tgt, void* imgData,
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unsigned imgStride);
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aidlevs::EvsResult doneWithFrame_impl(const aidlevs::BufferDesc& bufferDesc);
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aidlevs::EvsResult doneWithFrame_impl(uint32_t id, buffer_handle_t handle);
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// Synchronization necessary to deconflict the capture thread from the main service thread
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// Note that the service interface remains single threaded (ie: not reentrant)
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mutable std::mutex mAccessLock;
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// Static camera module information
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std::unique_ptr<ConfigManager::CameraInfo>& mCameraInfo;
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// Extended information
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std::unordered_map<uint32_t, std::vector<uint8_t>> mExtInfo;
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// Dump captured frames
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std::atomic<bool> mDumpFrame = false;
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// Path to store captured frames
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std::string mDumpPath;
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// Frame counter
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uint64_t mFrameCounter = 0;
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};
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} // namespace aidl::android::hardware::automotive::evs::implementation
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#endif // CPP_EVS_SAMPLEDRIVER_AIDL_INCLUDE_EVSV4LCAMERA_H
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