1 /* 2 * Copyright (C) 2008 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_ICAMERASERVICE_H 18 #define ANDROID_HARDWARE_ICAMERASERVICE_H 19 20 #include <utils/RefBase.h> 21 #include <binder/IInterface.h> 22 #include <binder/Parcel.h> 23 24 namespace android { 25 26 class ICamera; 27 class ICameraClient; 28 class ICameraServiceListener; 29 class ICameraDeviceUser; 30 class ICameraDeviceCallbacks; 31 class CameraMetadata; 32 class VendorTagDescriptor; 33 class String16; 34 35 class ICameraService : public IInterface 36 { 37 public: 38 /** 39 * Keep up-to-date with ICameraService.aidl in frameworks/base 40 */ 41 enum { 42 GET_NUMBER_OF_CAMERAS = IBinder::FIRST_CALL_TRANSACTION, 43 GET_CAMERA_INFO, 44 CONNECT, 45 CONNECT_DEVICE, 46 ADD_LISTENER, 47 REMOVE_LISTENER, 48 GET_CAMERA_CHARACTERISTICS, 49 GET_CAMERA_VENDOR_TAG_DESCRIPTOR, 50 GET_LEGACY_PARAMETERS, 51 SUPPORTS_CAMERA_API, 52 CONNECT_LEGACY, 53 SET_TORCH_MODE, 54 NOTIFY_SYSTEM_EVENT, 55 }; 56 57 enum { 58 USE_CALLING_UID = -1 59 }; 60 61 enum { 62 API_VERSION_1 = 1, 63 API_VERSION_2 = 2, 64 }; 65 66 enum { 67 CAMERA_TYPE_BACKWARD_COMPATIBLE = 0, 68 CAMERA_TYPE_ALL = 1, 69 }; 70 71 enum { 72 CAMERA_HAL_API_VERSION_UNSPECIFIED = -1 73 }; 74 75 /** 76 * Keep up-to-date with declarations in 77 * frameworks/base/services/core/java/com/android/server/camera/CameraService.java 78 * 79 * These event codes are intended to be used with the notifySystemEvent call. 80 */ 81 enum { 82 NO_EVENT = 0, 83 USER_SWITCHED, 84 }; 85 86 public: 87 DECLARE_META_INTERFACE(CameraService); 88 89 // Get the number of cameras that support basic color camera operation 90 // (type CAMERA_TYPE_BACKWARD_COMPATIBLE) 91 virtual int32_t getNumberOfCameras() = 0; 92 // Get the number of cameras of the specified type, one of CAMERA_TYPE_* 93 // enums 94 virtual int32_t getNumberOfCameras(int cameraType) = 0; 95 virtual status_t getCameraInfo(int cameraId, 96 /*out*/ 97 struct CameraInfo* cameraInfo) = 0; 98 99 virtual status_t getCameraCharacteristics(int cameraId, 100 /*out*/ 101 CameraMetadata* cameraInfo) = 0; 102 103 virtual status_t getCameraVendorTagDescriptor( 104 /*out*/ 105 sp<VendorTagDescriptor>& desc) = 0; 106 107 // Returns 'OK' if operation succeeded 108 // - Errors: ALREADY_EXISTS if the listener was already added 109 virtual status_t addListener(const sp<ICameraServiceListener>& listener) 110 = 0; 111 // Returns 'OK' if operation succeeded 112 // - Errors: BAD_VALUE if specified listener was not in the listener list 113 virtual status_t removeListener(const sp<ICameraServiceListener>& listener) 114 = 0; 115 /** 116 * clientPackageName and clientUid are used for permissions checking. if 117 * clientUid == USE_CALLING_UID, then the calling UID is used instead. Only 118 * trusted callers can set a clientUid other than USE_CALLING_UID. 119 */ 120 virtual status_t connect(const sp<ICameraClient>& cameraClient, 121 int cameraId, 122 const String16& clientPackageName, 123 int clientUid, 124 /*out*/ 125 sp<ICamera>& device) = 0; 126 127 virtual status_t connectDevice( 128 const sp<ICameraDeviceCallbacks>& cameraCb, 129 int cameraId, 130 const String16& clientPackageName, 131 int clientUid, 132 /*out*/ 133 sp<ICameraDeviceUser>& device) = 0; 134 135 virtual status_t getLegacyParameters( 136 int cameraId, 137 /*out*/ 138 String16* parameters) = 0; 139 140 /** 141 * Returns OK if device supports camera2 api, 142 * returns -EOPNOTSUPP if it doesn't. 143 */ 144 virtual status_t supportsCameraApi( 145 int cameraId, int apiVersion) = 0; 146 147 /** 148 * Connect the device as a legacy device for a given HAL version. 149 * For halVersion, use CAMERA_API_DEVICE_VERSION_* for a particular 150 * version, or CAMERA_HAL_API_VERSION_UNSPECIFIED for a service-selected version. 151 */ 152 virtual status_t connectLegacy(const sp<ICameraClient>& cameraClient, 153 int cameraId, int halVersion, 154 const String16& clientPackageName, 155 int clientUid, 156 /*out*/ 157 sp<ICamera>& device) = 0; 158 159 /** 160 * Turn on or off a camera's torch mode. Torch mode will be turned off by 161 * camera service if the lastest client binder that turns it on dies. 162 * 163 * return values: 164 * 0: on a successful operation. 165 * -ENOSYS: the camera device doesn't support this operation. It it returned 166 * if and only if android.flash.into.available is false. 167 * -EBUSY: the camera device is opened. 168 * -EINVAL: camera_id is invalid or clientBinder is NULL when enabling a 169 * torch mode. 170 */ 171 virtual status_t setTorchMode(const String16& cameraId, bool enabled, 172 const sp<IBinder>& clientBinder) = 0; 173 174 /** 175 * Notify the camera service of a system event. Should only be called from system_server. 176 */ 177 virtual void notifySystemEvent(int32_t eventId, const int32_t* args, size_t length) = 0; 178 }; 179 180 // ---------------------------------------------------------------------------- 181 182 class BnCameraService: public BnInterface<ICameraService> 183 { 184 public: 185 virtual status_t onTransact( uint32_t code, 186 const Parcel& data, 187 Parcel* reply, 188 uint32_t flags = 0); 189 }; 190 191 }; // namespace android 192 193 #endif 194
