1 /* 2 * Copyright (C) 2019 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 CPP_EVS_MANAGER_1_1_VIRTUALCAMERA_H_ 18 #define CPP_EVS_MANAGER_1_1_VIRTUALCAMERA_H_ 19 20 #include <android/hardware/automotive/evs/1.1/IEvsCamera.h> 21 #include <android/hardware/automotive/evs/1.1/IEvsCameraStream.h> 22 #include <android/hardware/automotive/evs/1.1/IEvsDisplay.h> 23 #include <android/hardware/automotive/evs/1.1/types.h> 24 #include <utils/Mutex.h> 25 26 #include <deque> 27 #include <set> 28 #include <thread> // NOLINT 29 #include <unordered_map> 30 31 namespace android::automotive::evs::V1_1::implementation { 32 33 class HalCamera; // From HalCamera.h 34 35 // This class represents an EVS camera to the client application. As such it presents 36 // the IEvsCamera interface, and also proxies the frame delivery to the client's 37 // IEvsCameraStream object. 38 class VirtualCamera : public hardware::automotive::evs::V1_1::IEvsCamera { 39 public: 40 explicit VirtualCamera(const std::vector<sp<HalCamera>>& halCameras); 41 virtual ~VirtualCamera(); 42 getAllowedBuffers()43 unsigned getAllowedBuffers() { return mFramesAllowed; } isStreaming()44 bool isStreaming() { return mStreamState == RUNNING; } getVersion()45 bool getVersion() const { return static_cast<int>(mStream_1_1 != nullptr); } 46 std::vector<sp<HalCamera>> getHalCameras(); setDescriptor(hardware::automotive::evs::V1_1::CameraDesc * desc)47 void setDescriptor(hardware::automotive::evs::V1_1::CameraDesc* desc) { mDesc = desc; } 48 49 // Proxy to receive frames and forward them to the client's stream 50 bool notify(const hardware::automotive::evs::V1_1::EvsEventDesc& event); 51 bool deliverFrame(const hardware::automotive::evs::V1_1::BufferDesc& bufDesc); 52 53 // Methods from hardware::automotive::evs::V1_0::IEvsCamera follow. 54 hardware::Return<void> getCameraInfo(getCameraInfo_cb _hidl_cb) override; 55 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> setMaxFramesInFlight( 56 uint32_t bufferCount) override; 57 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> startVideoStream( 58 const ::android::sp<hardware::automotive::evs::V1_0::IEvsCameraStream>& stream) 59 override; 60 hardware::Return<void> doneWithFrame( 61 const hardware::automotive::evs::V1_0::BufferDesc& buffer) override; 62 hardware::Return<void> stopVideoStream() override; 63 hardware::Return<int32_t> getExtendedInfo(uint32_t opaqueIdentifier) override; 64 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> setExtendedInfo( 65 uint32_t opaqueIdentifier, int32_t opaqueValue) override; 66 67 // Methods from hardware::automotive::evs::V1_1::IEvsCamera follow. 68 hardware::Return<void> getCameraInfo_1_1(getCameraInfo_1_1_cb _hidl_cb) override; 69 hardware::Return<void> getPhysicalCameraInfo(const hardware::hidl_string& deviceId, 70 getPhysicalCameraInfo_cb _hidl_cb) override; 71 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> doneWithFrame_1_1( 72 const hardware::hidl_vec<hardware::automotive::evs::V1_1::BufferDesc>& buffer) override; pauseVideoStream()73 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> pauseVideoStream() override { 74 return hardware::automotive::evs::V1_0::EvsResult::UNDERLYING_SERVICE_ERROR; 75 } resumeVideoStream()76 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> resumeVideoStream() override { 77 return hardware::automotive::evs::V1_0::EvsResult::UNDERLYING_SERVICE_ERROR; 78 } 79 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> setMaster() override; 80 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> forceMaster( 81 const sp<hardware::automotive::evs::V1_0::IEvsDisplay>& display) override; 82 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> unsetMaster() override; 83 hardware::Return<void> getParameterList(getParameterList_cb _hidl_cb) override; 84 hardware::Return<void> getIntParameterRange(hardware::automotive::evs::V1_1::CameraParam id, 85 getIntParameterRange_cb _hidl_cb) override; 86 hardware::Return<void> setIntParameter(hardware::automotive::evs::V1_1::CameraParam id, 87 int32_t value, setIntParameter_cb _hidl_cb) override; 88 hardware::Return<void> getIntParameter(hardware::automotive::evs::V1_1::CameraParam id, 89 getIntParameter_cb _hidl_cb) override; 90 hardware::Return<hardware::automotive::evs::V1_0::EvsResult> setExtendedInfo_1_1( 91 uint32_t opaqueIdentifier, const hardware::hidl_vec<uint8_t>& opaqueValue) override; 92 hardware::Return<void> getExtendedInfo_1_1(uint32_t opaqueIdentifier, 93 getExtendedInfo_1_1_cb _hidl_cb) override; 94 hardware::Return<void> importExternalBuffers( 95 const hardware::hidl_vec<hardware::automotive::evs::V1_1::BufferDesc>& buffers, 96 importExternalBuffers_cb _hidl_cb) override; 97 98 // Dump current status to a given file descriptor 99 std::string toString(const char* indent = "") const; 100 101 private: 102 void shutdown(); 103 104 // The low level camera interface that backs this proxy 105 // Use by camera thread, once constructed, do not update/change it 106 // until camera thread quits. 107 std::unordered_map<std::string, wp<HalCamera>> mHalCamera; 108 109 sp<hardware::automotive::evs::V1_0::IEvsCameraStream> mStream; 110 sp<hardware::automotive::evs::V1_1::IEvsCameraStream> mStream_1_1; 111 112 unsigned mFramesAllowed = 1; 113 114 // Access by camera thread also, use with cautions for race conditions. 115 enum { 116 STOPPED, 117 RUNNING, 118 STOPPING, 119 } mStreamState; 120 mutable std::recursive_mutex mFramesHeldMutex; 121 std::unordered_map<std::string, std::deque<hardware::automotive::evs::V1_1::BufferDesc>> 122 mFramesHeld; 123 hardware::automotive::evs::V1_1::CameraDesc* mDesc; 124 std::thread mCaptureThread; 125 126 mutable std::mutex mFrameDeliveryMutex; 127 std::condition_variable mFramesReadySignal; 128 std::set<std::string> mSourceCameras GUARDED_BY(mFrameDeliveryMutex); 129 }; 130 131 } // namespace android::automotive::evs::V1_1::implementation 132 133 #endif // CPP_EVS_MANAGER_1_1_VIRTUALCAMERA_H_ 134