1 /* 2 * Copyright (C) 2018 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_CAMERA_PROVIDER_V2_4_EXTCAMERAPROVIDER_H 18 #define ANDROID_HARDWARE_CAMERA_PROVIDER_V2_4_EXTCAMERAPROVIDER_H 19 20 #include <string> 21 #include <unordered_map> 22 #include <unordered_set> 23 #include <utils/Mutex.h> 24 #include <utils/Thread.h> 25 #include <hidl/Status.h> 26 #include <hidl/MQDescriptor.h> 27 #include "ExternalCameraUtils.h" 28 29 #include "CameraProvider_2_4.h" 30 31 namespace android { 32 namespace hardware { 33 namespace camera { 34 namespace provider { 35 namespace V2_4 { 36 namespace implementation { 37 38 using ::android::hardware::camera::common::V1_0::CameraDeviceStatus; 39 using ::android::hardware::camera::common::V1_0::Status; 40 using ::android::hardware::camera::common::V1_0::VendorTagSection; 41 using ::android::hardware::camera::external::common::ExternalCameraConfig; 42 using ::android::hardware::camera::provider::V2_4::ICameraProvider; 43 using ::android::hardware::camera::provider::V2_4::ICameraProviderCallback; 44 using ::android::hardware::Return; 45 using ::android::hardware::Void; 46 using ::android::hardware::hidl_vec; 47 using ::android::hardware::hidl_string; 48 using ::android::sp; 49 using ::android::Mutex; 50 51 /** 52 * The implementation of external webcam CameraProvider 2.4, separated 53 * from the HIDL interface layer to allow for implementation reuse by later 54 * provider versions. 55 * 56 * This camera provider supports standard UVC webcameras via the Linux V4L2 57 * UVC driver. 58 */ 59 struct ExternalCameraProviderImpl_2_4 { 60 ExternalCameraProviderImpl_2_4(); 61 ~ExternalCameraProviderImpl_2_4(); 62 63 // Caller must use this method to check if CameraProvider ctor failed isInitFailedExternalCameraProviderImpl_2_464 bool isInitFailed() { return false;} 65 66 // Methods from ::android::hardware::camera::provider::V2_4::ICameraProvider follow. 67 Return<Status> setCallback(const sp<ICameraProviderCallback>& callback); 68 Return<void> getVendorTags(ICameraProvider::getVendorTags_cb _hidl_cb); 69 Return<void> getCameraIdList(ICameraProvider::getCameraIdList_cb _hidl_cb); 70 Return<void> isSetTorchModeSupported(ICameraProvider::isSetTorchModeSupported_cb _hidl_cb); 71 Return<void> getCameraDeviceInterface_V1_x( 72 const hidl_string&, 73 ICameraProvider::getCameraDeviceInterface_V1_x_cb); 74 Return<void> getCameraDeviceInterface_V3_x( 75 const hidl_string&, 76 ICameraProvider::getCameraDeviceInterface_V3_x_cb); 77 78 private: 79 80 void addExternalCamera(const char* devName); 81 82 void deviceAdded(const char* devName); 83 84 void deviceRemoved(const char* devName); 85 86 class HotplugThread : public android::Thread { 87 public: 88 HotplugThread(ExternalCameraProviderImpl_2_4* parent); 89 ~HotplugThread(); 90 91 virtual bool threadLoop() override; 92 93 private: 94 ExternalCameraProviderImpl_2_4* mParent = nullptr; 95 const std::unordered_set<std::string> mInternalDevices; 96 97 int mINotifyFD = -1; 98 int mWd = -1; 99 }; 100 101 Mutex mLock; 102 sp<ICameraProviderCallback> mCallbacks = nullptr; 103 std::unordered_map<std::string, CameraDeviceStatus> mCameraStatusMap; // camera id -> status 104 const ExternalCameraConfig mCfg; 105 HotplugThread mHotPlugThread; 106 int mPreferredHal3MinorVersion; 107 }; 108 109 110 111 } // namespace implementation 112 } // namespace V2_4 113 } // namespace provider 114 } // namespace camera 115 } // namespace hardware 116 } // namespace android 117 118 #endif // ANDROID_HARDWARE_CAMERA_PROVIDER_V2_4_EXTCAMERAPROVIDER_H 119