1 /* 2 * Copyright (C) 2013 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_SERVERS_CAMERA_CAMERA2CLIENT_BASE_H 18 #define ANDROID_SERVERS_CAMERA_CAMERA2CLIENT_BASE_H 19 20 #include "common/CameraDeviceBase.h" 21 #include "camera/CaptureResult.h" 22 23 namespace android { 24 25 class IMemory; 26 27 class CameraService; 28 29 template <typename TClientBase> 30 class Camera2ClientBase : 31 public TClientBase, 32 public CameraDeviceBase::NotificationListener 33 { 34 public: 35 typedef typename TClientBase::TCamCallbacks TCamCallbacks; 36 37 /** 38 * Base binder interface (see ICamera/ICameraDeviceUser for details) 39 */ 40 virtual status_t connect(const sp<TCamCallbacks>& callbacks); 41 virtual binder::Status disconnect(); 42 43 /** 44 * Interface used by CameraService 45 */ 46 47 // TODO: too many params, move into a ClientArgs<T> 48 Camera2ClientBase(const sp<CameraService>& cameraService, 49 const sp<TCamCallbacks>& remoteCallback, 50 const String16& clientPackageName, 51 const String8& cameraId, 52 int api1CameraId, 53 int cameraFacing, 54 int clientPid, 55 uid_t clientUid, 56 int servicePid); 57 virtual ~Camera2ClientBase(); 58 59 virtual status_t initialize(sp<CameraProviderManager> manager, const String8& monitorTags); 60 virtual status_t dumpClient(int fd, const Vector<String16>& args); 61 62 /** 63 * CameraDeviceBase::NotificationListener implementation 64 */ 65 66 virtual void notifyError(int32_t errorCode, 67 const CaptureResultExtras& resultExtras); 68 virtual void notifyIdle(); 69 virtual void notifyShutter(const CaptureResultExtras& resultExtras, 70 nsecs_t timestamp); 71 virtual void notifyAutoFocus(uint8_t newState, int triggerId); 72 virtual void notifyAutoExposure(uint8_t newState, int triggerId); 73 virtual void notifyAutoWhitebalance(uint8_t newState, 74 int triggerId); 75 virtual void notifyPrepared(int streamId); 76 virtual void notifyRequestQueueEmpty(); 77 virtual void notifyRepeatingRequestError(long lastFrameNumber); 78 79 int getCameraId() const; 80 const sp<CameraDeviceBase>& 81 getCameraDevice(); 82 int getCameraDeviceVersion() const; 83 const sp<CameraService>& 84 getCameraService(); 85 86 /** 87 * Interface used by independent components of CameraClient2Base. 88 */ 89 90 // Simple class to ensure that access to TCamCallbacks is serialized 91 // by requiring mRemoteCallbackLock to be locked before access to 92 // mRemoteCallback is possible. 93 class SharedCameraCallbacks { 94 public: 95 class Lock { 96 public: 97 explicit Lock(SharedCameraCallbacks &client); 98 ~Lock(); 99 sp<TCamCallbacks> &mRemoteCallback; 100 private: 101 SharedCameraCallbacks &mSharedClient; 102 }; 103 explicit SharedCameraCallbacks(const sp<TCamCallbacks>& client); 104 SharedCameraCallbacks& operator=(const sp<TCamCallbacks>& client); 105 void clear(); 106 private: 107 sp<TCamCallbacks> mRemoteCallback; 108 mutable Mutex mRemoteCallbackLock; 109 } mSharedCameraCallbacks; 110 111 protected: 112 113 // The PID provided in the constructor call 114 pid_t mInitialClientPid; 115 asBinderWrapper()116 virtual sp<IBinder> asBinderWrapper() { 117 return IInterface::asBinder(this); 118 } 119 120 virtual status_t dumpDevice(int fd, const Vector<String16>& args); 121 122 /** Binder client interface-related private members */ 123 124 // Mutex that must be locked by methods implementing the binder client 125 // interface. Ensures serialization between incoming client calls. 126 // All methods in this class hierarchy that append 'L' to the name assume 127 // that mBinderSerializationLock is locked when they're called 128 mutable Mutex mBinderSerializationLock; 129 130 /** CameraDeviceBase instance wrapping HAL3+ entry */ 131 132 const int mDeviceVersion; 133 134 // Set to const to avoid mDevice being updated (update of sp<> is racy) during 135 // dumpDevice (which is important to be lock free for debugging purpose) 136 const sp<CameraDeviceBase> mDevice; 137 138 /** Utility members */ 139 140 // Verify that caller is the owner of the camera 141 status_t checkPid(const char *checkLocation) const; 142 143 virtual void detachDevice(); 144 145 bool mDeviceActive; 146 147 const int mApi1CameraId; // -1 if client is API2 148 149 private: 150 template<typename TProviderPtr> 151 status_t initializeImpl(TProviderPtr providerPtr, const String8& monitorTags); 152 }; 153 154 }; // namespace android 155 156 #endif 157