1 /* 2 * Copyright (C) 2015 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 package com.android.camera.one; 18 19 import android.content.Context; 20 import android.util.DisplayMetrics; 21 22 import com.android.camera.device.ActiveCameraDeviceTracker; 23 import com.android.camera.one.config.OneCameraFeatureConfig; 24 import com.android.camera.one.v1.LegacyOneCameraManagerImpl; 25 import com.android.camera.one.v1.LegacyOneCameraOpenerImpl; 26 import com.android.camera.one.v2.Camera2OneCameraManagerImpl; 27 import com.android.camera.one.v2.Camera2OneCameraOpenerImpl; 28 import com.google.common.base.Optional; 29 30 /** 31 * Factory methods and functions for selecting and creating instances of 32 * OneCamera objects. 33 */ 34 public final class OneCameraModule { OneCameraModule()35 private OneCameraModule() { } 36 37 /** 38 * Creates a new camera manager that is based on Camera2 API, if available. 39 * 40 * @throws OneCameraException Thrown if an error occurred while trying to 41 * access the camera. 42 */ provideOneCameraOpener( OneCameraFeatureConfig featureConfig, Context context, ActiveCameraDeviceTracker activeCameraDeviceTracker, DisplayMetrics displayMetrics)43 public static OneCameraOpener provideOneCameraOpener( 44 OneCameraFeatureConfig featureConfig, 45 Context context, 46 ActiveCameraDeviceTracker activeCameraDeviceTracker, 47 DisplayMetrics displayMetrics) throws OneCameraException { 48 Optional<OneCameraOpener> manager = Camera2OneCameraOpenerImpl.create( 49 featureConfig, context, activeCameraDeviceTracker, displayMetrics); 50 if (!manager.isPresent()) { 51 manager = LegacyOneCameraOpenerImpl.create(); 52 } 53 if (!manager.isPresent()) { 54 throw new OneCameraException("No camera manager is available."); 55 } 56 return manager.get(); 57 } 58 59 /** 60 * Creates a new hardware manager that is based on Camera2 API, if available. 61 * 62 * @throws OneCameraException Thrown if an error occurred while trying to 63 * access the camera which may occur when accessing the legacy 64 * hardware manager. 65 */ provideOneCameraManager()66 public static OneCameraManager provideOneCameraManager() throws OneCameraException { 67 Optional<Camera2OneCameraManagerImpl> camera2HwManager = Camera2OneCameraManagerImpl 68 .create(); 69 if (camera2HwManager.isPresent()) { 70 return camera2HwManager.get(); 71 } 72 73 Optional<LegacyOneCameraManagerImpl> legacyHwManager = LegacyOneCameraManagerImpl.instance(); 74 if (legacyHwManager.isPresent()) { 75 return legacyHwManager.get(); 76 } 77 78 throw new OneCameraException("No hardware manager is available."); 79 } 80 } 81