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 cameraFacing, 53 int clientPid, 54 uid_t clientUid, 55 int servicePid); 56 virtual ~Camera2ClientBase(); 57 58 virtual status_t initialize(sp<CameraProviderManager> manager); 59 virtual status_t dumpClient(int fd, const Vector<String16>& args); 60 61 /** 62 * CameraDeviceBase::NotificationListener implementation 63 */ 64 65 virtual void notifyError(int32_t errorCode, 66 const CaptureResultExtras& resultExtras); 67 virtual void notifyIdle(); 68 virtual void notifyShutter(const CaptureResultExtras& resultExtras, 69 nsecs_t timestamp); 70 virtual void notifyAutoFocus(uint8_t newState, int triggerId); 71 virtual void notifyAutoExposure(uint8_t newState, int triggerId); 72 virtual void notifyAutoWhitebalance(uint8_t newState, 73 int triggerId); 74 virtual void notifyPrepared(int streamId); 75 virtual void notifyRequestQueueEmpty(); 76 virtual void notifyRepeatingRequestError(long lastFrameNumber); 77 78 int getCameraId() const; 79 const sp<CameraDeviceBase>& 80 getCameraDevice(); 81 int getCameraDeviceVersion() const; 82 const sp<CameraService>& 83 getCameraService(); 84 85 /** 86 * Interface used by independent components of CameraClient2Base. 87 */ 88 89 // Simple class to ensure that access to TCamCallbacks is serialized 90 // by requiring mRemoteCallbackLock to be locked before access to 91 // mRemoteCallback is possible. 92 class SharedCameraCallbacks { 93 public: 94 class Lock { 95 public: 96 explicit Lock(SharedCameraCallbacks &client); 97 ~Lock(); 98 sp<TCamCallbacks> &mRemoteCallback; 99 private: 100 SharedCameraCallbacks &mSharedClient; 101 }; 102 explicit SharedCameraCallbacks(const sp<TCamCallbacks>& client); 103 SharedCameraCallbacks& operator=(const sp<TCamCallbacks>& client); 104 void clear(); 105 private: 106 sp<TCamCallbacks> mRemoteCallback; 107 mutable Mutex mRemoteCallbackLock; 108 } mSharedCameraCallbacks; 109 110 protected: 111 112 // The PID provided in the constructor call 113 pid_t mInitialClientPid; 114 asBinderWrapper()115 virtual sp<IBinder> asBinderWrapper() { 116 return IInterface::asBinder(this); 117 } 118 119 virtual status_t dumpDevice(int fd, const Vector<String16>& args); 120 121 /** Binder client interface-related private members */ 122 123 // Mutex that must be locked by methods implementing the binder client 124 // interface. Ensures serialization between incoming client calls. 125 // All methods in this class hierarchy that append 'L' to the name assume 126 // that mBinderSerializationLock is locked when they're called 127 mutable Mutex mBinderSerializationLock; 128 129 /** CameraDeviceBase instance wrapping HAL3+ entry */ 130 131 const int mDeviceVersion; 132 sp<CameraDeviceBase> mDevice; 133 134 /** Utility members */ 135 136 // Verify that caller is the owner of the camera 137 status_t checkPid(const char *checkLocation) const; 138 139 virtual void detachDevice(); 140 141 bool mDeviceActive; 142 143 private: 144 template<typename TProviderPtr> 145 status_t initializeImpl(TProviderPtr providerPtr); 146 }; 147 148 }; // namespace android 149 150 #endif 151