1 /* 2 * Copyright 2020 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_EVSEMULATEDCAMERA_H 18 #define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSEMULATEDCAMERA_H 19 20 #include "VideoCapture.h" 21 22 #include <functional> 23 #include <unordered_map> 24 25 #include <android/hardware/automotive/evs/1.1/types.h> 26 #include <android/hardware/automotive/evs/1.1/IEvsCamera.h> 27 #include <android/hardware/automotive/evs/1.1/IEvsCameraStream.h> 28 #include <android/hardware/automotive/evs/1.1/IEvsDisplay.h> 29 #include <android/hardware/camera/device/3.2/ICameraDevice.h> 30 #include <ui/GraphicBuffer.h> 31 32 using ::android::hardware::hidl_string; 33 using ::android::hardware::camera::device::V3_2::Stream; 34 using ::android::hardware::automotive::evs::V1_0::EvsResult; 35 using ::android::hardware::automotive::evs::V1_1::CameraDesc; 36 37 using IEvsDisplay_1_0 = ::android::hardware::automotive::evs::V1_0::IEvsDisplay; 38 using IEvsDisplay_1_1 = ::android::hardware::automotive::evs::V1_1::IEvsDisplay; 39 using BufferDesc_1_0 = ::android::hardware::automotive::evs::V1_0::BufferDesc; 40 using BufferDesc_1_1 = ::android::hardware::automotive::evs::V1_1::BufferDesc; 41 using IEvsCamera_1_1 = ::android::hardware::automotive::evs::V1_1::IEvsCamera; 42 using IEvsCameraStream_1_0 = ::android::hardware::automotive::evs::V1_0::IEvsCameraStream; 43 using IEvsCameraStream_1_1 = ::android::hardware::automotive::evs::V1_1::IEvsCameraStream; 44 45 using ::android::hardware::Return; 46 using ::android::hardware::hidl_vec; 47 using namespace ::android::hardware::automotive::evs::V1_1; 48 49 namespace android { 50 namespace automotive { 51 namespace evs { 52 namespace V1_1 { 53 namespace implementation { 54 55 struct EmulatedCameraDesc { 56 int width; // Camera output width in pixels 57 int height; // Camera output height in pixels 58 std::string path; // Path to the directory where source files are stored 59 std::chrono::nanoseconds interval; // Interval between two consecutive frames; this is 60 // a reciprocal of the framerate 61 }; 62 63 64 class EvsEmulatedCamera : public IEvsCamera_1_1 { 65 public: 66 // Methods from ::android::hardware::automotive::evs::V1_0::IEvsCamera follow. 67 Return<void> getCameraInfo(getCameraInfo_cb _hidl_cb) override; 68 Return<EvsResult> setMaxFramesInFlight(uint32_t bufferCount) override; 69 Return<EvsResult> startVideoStream(const ::android::sp<IEvsCameraStream_1_0>& stream) override; 70 Return<void> doneWithFrame(const BufferDesc_1_0& buffer) override; 71 Return<void> stopVideoStream() override; 72 Return<int32_t> getExtendedInfo(uint32_t opaqueIdentifier) override; 73 Return<EvsResult> setExtendedInfo(uint32_t opaqueIdentifier, int32_t opaqueValue) override; 74 75 // Methods from ::android::hardware::automotive::evs::V1_1::IEvsCamera follow. 76 Return<void> getCameraInfo_1_1(getCameraInfo_1_1_cb _hidl_cb) override; 77 Return<void> getPhysicalCameraInfo(const hidl_string& deviceId, 78 getPhysicalCameraInfo_cb _hidl_cb) override; 79 Return<EvsResult> pauseVideoStream() override; 80 Return<EvsResult> resumeVideoStream() override; 81 Return<EvsResult> doneWithFrame_1_1(const hidl_vec<BufferDesc_1_1>& buffer) override; 82 Return<EvsResult> setMaster() override; 83 Return<EvsResult> forceMaster(const sp<IEvsDisplay_1_0>&) override; 84 Return<EvsResult> unsetMaster() override; 85 Return<void> getParameterList(getParameterList_cb _hidl_cb) override; 86 Return<void> getIntParameterRange(CameraParam id, 87 getIntParameterRange_cb _hidl_cb) override; 88 Return<void> setIntParameter(CameraParam id, int32_t value, 89 setIntParameter_cb _hidl_cb) override; 90 Return<void> getIntParameter(CameraParam id, 91 getIntParameter_cb _hidl_cb) override; 92 Return<EvsResult> setExtendedInfo_1_1(uint32_t opaqueIdentifier, 93 const hidl_vec<uint8_t>& opaqueValue) override; 94 Return<void> getExtendedInfo_1_1(uint32_t opaqueIdentifier, 95 getExtendedInfo_1_1_cb _hidl_cb) override; 96 Return<void> importExternalBuffers(const hidl_vec<BufferDesc_1_1>& buffers, 97 importExternalBuffers_cb _hidl_cb) override; 98 99 static sp<EvsEmulatedCamera> Create(const char *deviceName, 100 const EmulatedCameraDesc& desc); 101 EvsEmulatedCamera(const EvsEmulatedCamera&) = delete; 102 EvsEmulatedCamera& operator=(const EvsEmulatedCamera&) = delete; 103 104 virtual ~EvsEmulatedCamera() override; 105 void shutdown(); 106 getDesc()107 const CameraDesc& getDesc() { return mDescription; }; 108 109 bool openDevice(); 110 111 private: 112 // Constructors 113 EvsEmulatedCamera(const char *deviceName, 114 const EmulatedCameraDesc& desc); 115 116 // These three functions are expected to be called while mAccessLock is held 117 bool setAvailableFrames_Locked(unsigned bufferCount); 118 unsigned increaseAvailableFrames_Locked(unsigned numToAdd); 119 unsigned decreaseAvailableFrames_Locked(unsigned numToRemove); 120 121 void forwardFrame(imageBufferDesc* tgt, void* data); 122 123 sp<IEvsCameraStream_1_1> mStream = nullptr; // The callback used to deliver each frame 124 125 sp<VideoCapture> mVideo; // Virtual video device 126 CameraDesc mDescription; // The properties of this camera 127 128 uint32_t mFormat = 0; // Values from android_pixel_format_t 129 uint32_t mUsage = 0; // Values from from Gralloc.h 130 uint32_t mStride = 0; // Number of bytes from one row of pixels in memory 131 // to the next 132 133 struct BufferRecord { 134 buffer_handle_t handle; 135 bool inUse; 136 BufferRecordBufferRecord137 explicit BufferRecord(buffer_handle_t h) : handle(h), inUse(false) {}; 138 }; 139 140 std::vector <BufferRecord> mBuffers; // Graphics buffers to transfer images 141 unsigned mFramesAllowed; // How many buffers are we currently using 142 unsigned mFramesInUse; // How many buffers are currently outstanding 143 144 145 EvsResult doneWithFrame_impl(const uint32_t id, const buffer_handle_t handle); 146 147 // Synchronization necessary to deconflict the capture thread from the main service thread 148 // Note that the service interface remains single threaded (ie: not reentrant) 149 std::mutex mAccessLock; 150 151 // Extended information 152 std::unordered_map<uint32_t, std::vector<uint8_t>> mExtInfo; 153 154 // Emulated device description 155 EmulatedCameraDesc mCaptureDeviceDesc; 156 }; 157 158 } // namespace implementation 159 } // namespace V1_1 160 } // namespace evs 161 } // namespace automotive 162 } // namespace android 163 164 #endif // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSEMULATEDCAMERA_H 165