1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSV4LCAMERA_H 18 #define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSV4LCAMERA_H 19 20 #include "ConfigManager.h" 21 #include "VideoCapture.h" 22 23 #include <android-base/result.h> 24 #include <android/hardware/automotive/evs/1.1/IEvsCamera.h> 25 #include <android/hardware/automotive/evs/1.1/IEvsCameraStream.h> 26 #include <android/hardware/automotive/evs/1.1/IEvsDisplay.h> 27 #include <android/hardware/automotive/evs/1.1/types.h> 28 #include <android/hardware/camera/device/3.2/ICameraDevice.h> 29 #include <ui/GraphicBuffer.h> 30 31 #include <functional> 32 #include <thread> 33 34 namespace android { 35 namespace hardware { 36 namespace automotive { 37 namespace evs { 38 namespace V1_1 { 39 namespace implementation { 40 41 using ::android::hardware::hidl_string; 42 using ::android::hardware::automotive::evs::V1_0::CameraDesc; 43 using ::android::hardware::automotive::evs::V1_0::EvsResult; 44 using ::android::hardware::camera::device::V3_2::Stream; 45 46 using IEvsDisplay_1_0 = ::android::hardware::automotive::evs::V1_0::IEvsDisplay; 47 using IEvsDisplay_1_1 = ::android::hardware::automotive::evs::V1_1::IEvsDisplay; 48 using BufferDesc_1_0 = ::android::hardware::automotive::evs::V1_0::BufferDesc; 49 using BufferDesc_1_1 = ::android::hardware::automotive::evs::V1_1::BufferDesc; 50 using IEvsCameraStream_1_0 = ::android::hardware::automotive::evs::V1_0::IEvsCameraStream; 51 using IEvsCameraStream_1_1 = ::android::hardware::automotive::evs::V1_1::IEvsCameraStream; 52 53 // From EvsEnumerator.h 54 class EvsEnumerator; 55 56 class EvsV4lCamera : public IEvsCamera { 57 public: 58 // Methods from ::android::hardware::automotive::evs::V1_0::IEvsCamera follow. 59 Return<void> getCameraInfo(getCameraInfo_cb _hidl_cb) override; 60 Return<EvsResult> setMaxFramesInFlight(uint32_t bufferCount) override; 61 Return<EvsResult> startVideoStream(const ::android::sp<IEvsCameraStream_1_0>& stream) override; 62 Return<void> doneWithFrame(const BufferDesc_1_0& buffer) override; 63 Return<void> stopVideoStream() override; 64 Return<int32_t> getExtendedInfo(uint32_t opaqueIdentifier) override; 65 Return<EvsResult> setExtendedInfo(uint32_t opaqueIdentifier, int32_t opaqueValue) override; 66 67 // Methods from ::android::hardware::automotive::evs::V1_1::IEvsCamera follow. 68 Return<void> getCameraInfo_1_1(getCameraInfo_1_1_cb _hidl_cb) override; 69 Return<void> getPhysicalCameraInfo(const hidl_string& deviceId, 70 getPhysicalCameraInfo_cb _hidl_cb) override; 71 Return<EvsResult> pauseVideoStream() override; 72 Return<EvsResult> resumeVideoStream() override; 73 Return<EvsResult> doneWithFrame_1_1(const hidl_vec<BufferDesc_1_1>& buffer) override; 74 Return<EvsResult> setMaster() override; 75 Return<EvsResult> forceMaster(const sp<IEvsDisplay_1_0>&) override; 76 Return<EvsResult> unsetMaster() override; 77 Return<void> getParameterList(getParameterList_cb _hidl_cb) override; 78 Return<void> getIntParameterRange(CameraParam id, getIntParameterRange_cb _hidl_cb) override; 79 Return<void> setIntParameter(CameraParam id, int32_t value, 80 setIntParameter_cb _hidl_cb) override; 81 Return<void> getIntParameter(CameraParam id, getIntParameter_cb _hidl_cb) override; 82 Return<EvsResult> setExtendedInfo_1_1(uint32_t opaqueIdentifier, 83 const hidl_vec<uint8_t>& opaqueValue) override; 84 Return<void> getExtendedInfo_1_1(uint32_t opaqueIdentifier, 85 getExtendedInfo_1_1_cb _hidl_cb) override; 86 Return<void> importExternalBuffers(const hidl_vec<BufferDesc_1_1>& buffers, 87 importExternalBuffers_cb _hidl_cb) override; 88 89 static sp<EvsV4lCamera> Create(const char* deviceName); 90 static sp<EvsV4lCamera> Create(const char* deviceName, 91 std::unique_ptr<ConfigManager::CameraInfo>& camInfo, 92 const Stream* streamCfg = nullptr); 93 EvsV4lCamera(const EvsV4lCamera&) = delete; 94 EvsV4lCamera& operator=(const EvsV4lCamera&) = delete; 95 96 virtual ~EvsV4lCamera() override; 97 void shutdown(); 98 getDesc()99 const V1_1::CameraDesc& getDesc() { return mDescription; }; 100 101 // Dump captured frames to the filesystem 102 android::base::Result<void> startDumpFrames(const std::string& path); 103 android::base::Result<void> stopDumpFrames(); 104 105 private: 106 // Constructors 107 EvsV4lCamera(const char* deviceName, std::unique_ptr<ConfigManager::CameraInfo>& camInfo); 108 109 // These three functions are expected to be called while mAccessLock is held 110 bool setAvailableFrames_Locked(unsigned bufferCount); 111 unsigned increaseAvailableFrames_Locked(unsigned numToAdd); 112 unsigned decreaseAvailableFrames_Locked(unsigned numToRemove); 113 114 void forwardFrame(imageBuffer* tgt, void* data); 115 inline bool convertToV4l2CID(CameraParam id, uint32_t& v4l2cid); 116 117 sp<IEvsCameraStream_1_0> mStream = nullptr; // The callback used to deliver each frame 118 sp<IEvsCameraStream_1_1> mStream_1_1 = nullptr; // The callback used to deliver each frame 119 120 VideoCapture mVideo; // Interface to the v4l device 121 V1_1::CameraDesc mDescription = {}; // The properties of this camera 122 123 uint32_t mFormat = 0; // Values from android_pixel_format_t 124 uint32_t mUsage = 0; // Values from from Gralloc.h 125 uint32_t mStride = 0; // Pixels per row (may be greater than image width) 126 127 struct BufferRecord { 128 buffer_handle_t handle; 129 bool inUse; 130 BufferRecordBufferRecord131 explicit BufferRecord(buffer_handle_t h) : handle(h), inUse(false) {}; 132 }; 133 134 std::vector<BufferRecord> mBuffers; // Graphics buffers to transfer images 135 unsigned mFramesAllowed; // How many buffers are we currently using 136 unsigned mFramesInUse; // How many buffers are currently outstanding 137 138 std::set<uint32_t> mCameraControls; // Available camera controls 139 140 // Which format specific function we need to use to move camera imagery into our output buffers 141 void (*mFillBufferFromVideo)(const BufferDesc& tgtBuff, uint8_t* tgt, void* imgData, void* buf, 142 unsigned imgStride); 143 144 EvsResult doneWithFrame_impl(const uint32_t id, const buffer_handle_t handle); 145 146 // Synchronization necessary to deconflict the capture thread from the main service thread 147 // Note that the service interface remains single threaded (ie: not reentrant) 148 std::mutex mAccessLock; 149 150 // Static camera module information 151 std::unique_ptr<ConfigManager::CameraInfo>& mCameraInfo; 152 153 // Extended information 154 std::unordered_map<uint32_t, std::vector<uint8_t>> mExtInfo; 155 156 // Dump captured frames 157 std::atomic<bool> mDumpFrame = false; 158 159 // Path to store captured frames 160 std::string mDumpPath; 161 162 // Frame counter 163 uint64_t mFrameCounter = 0; 164 165 // A buffer to hold an intermediate color conversion data 166 std::vector<uint8_t> mColorSpaceConversionBuffer; 167 }; 168 169 } // namespace implementation 170 } // namespace V1_1 171 } // namespace evs 172 } // namespace automotive 173 } // namespace hardware 174 } // namespace android 175 176 #endif // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSV4LCAMERA_H 177