1 /* 2 * Copyright (C) 2014 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.v2.common; 18 19 import android.annotation.TargetApi; 20 import android.graphics.Rect; 21 import android.hardware.camera2.CaptureRequest; 22 import android.hardware.camera2.params.MeteringRectangle; 23 import android.os.Build.VERSION_CODES; 24 25 import com.android.camera.async.Lifetime; 26 import com.android.camera.async.Observable; 27 import com.android.camera.async.SafeCloseable; 28 import com.android.camera.one.OneCamera; 29 import com.android.camera.one.OneCameraCharacteristics; 30 import com.android.camera.one.OneCameraCharacteristics.FaceDetectMode; 31 import com.android.camera.one.Settings3A; 32 import com.android.camera.one.v2.autofocus.ManualAutoFocus; 33 import com.android.camera.one.v2.autofocus.ManualAutoFocusFactory; 34 import com.android.camera.one.v2.commands.CameraCommand; 35 import com.android.camera.one.v2.commands.CameraCommandExecutor; 36 import com.android.camera.one.v2.commands.ResettingRunnableCameraCommand; 37 import com.android.camera.one.v2.commands.PreviewCommandFactory; 38 import com.android.camera.one.v2.core.FrameServer; 39 import com.android.camera.one.v2.core.RequestBuilder; 40 import com.android.camera.one.v2.core.RequestTemplate; 41 import com.android.camera.one.v2.face.FaceDetect; 42 import com.google.common.base.Supplier; 43 import com.google.common.base.Suppliers; 44 import com.google.common.util.concurrent.MoreExecutors; 45 46 import java.util.concurrent.Executors; 47 48 /** 49 * Wires together functionality common to all cameras: 50 * <ul> 51 * <li>Tap-to-focus</li> 52 * <li>Auto exposure, based on the current flash-setting</li> 53 * <li>Metering regions</li> 54 * <li>Zoom</li> 55 * <li>TODO Logging of OS/driver-level errors</li> 56 * </ul> 57 * <p> 58 * Note that this does not include functionality for taking pictures, since this 59 * varies depending on hardware capability. 60 * </p> 61 */ 62 @TargetApi(VERSION_CODES.LOLLIPOP) 63 public class BasicCameraFactory { 64 private final ManualAutoFocus mManualAutoFocus; 65 private final RequestBuilder.Factory mMeteredZoomedRequestBuilder; 66 private final Runnable mPreviewUpdater; 67 68 /** 69 * @param lifetime The lifetime of all created objects and their associated 70 * resources. 71 * @param cameraCharacteristics 72 * @param rootTemplate Provides preconfigured request builders to be used for 73 * all requests to mFrameServer. 74 * @param cameraCommandExecutor The 75 * @param templateType The template (e.g. CameraDevice.TEMPLATE_PREVIEW) to 76 * use for repeating requests. 77 */ 78 public BasicCameraFactory(Lifetime lifetime, 79 OneCameraCharacteristics cameraCharacteristics, 80 FrameServer frameServer, 81 RequestBuilder.Factory rootTemplate, 82 CameraCommandExecutor cameraCommandExecutor, 83 PreviewCommandFactory previewCommandFactory, 84 Observable<OneCamera.PhotoCaptureParameters.Flash> flash, 85 Observable<Integer> exposure, 86 Observable<Float> zoom, 87 Observable<Boolean> hdrSceneSetting, 88 int templateType) { 89 RequestTemplate requestTemplate = new RequestTemplate(rootTemplate); 90 requestTemplate.setParam( 91 CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); 92 requestTemplate.setParam( 93 CaptureRequest.CONTROL_AE_MODE, new FlashBasedAEMode(flash, hdrSceneSetting)); 94 requestTemplate.setParam( 95 CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, exposure); 96 97 Supplier<FaceDetectMode> faceDetectMode = Suppliers.ofInstance( 98 FaceDetect.getHighestFaceDetectMode(cameraCharacteristics)); 99 100 requestTemplate.setParam(CaptureRequest.CONTROL_MODE, 101 new ControlModeSelector(hdrSceneSetting, 102 faceDetectMode, 103 cameraCharacteristics.getSupportedHardwareLevel())); 104 requestTemplate.setParam( 105 CaptureRequest.CONTROL_SCENE_MODE, new ControlSceneModeSelector( 106 hdrSceneSetting, 107 faceDetectMode, 108 cameraCharacteristics.getSupportedHardwareLevel())); 109 requestTemplate.setParam(CaptureRequest.STATISTICS_FACE_DETECT_MODE, 110 new StatisticsFaceDetectMode(faceDetectMode)); 111 112 Supplier<Rect> cropRegion = new ZoomedCropRegion( 113 cameraCharacteristics.getSensorInfoActiveArraySize(), zoom); 114 requestTemplate.setParam(CaptureRequest.SCALER_CROP_REGION, cropRegion); 115 116 CameraCommand previewUpdaterCommand = 117 previewCommandFactory.get(requestTemplate, templateType); 118 119 // Use a resetting command to ensure that many rapid settings changes do 120 // not result in many rapid (>30fps) requests to restart the preview. 121 mPreviewUpdater = new ResettingRunnableCameraCommand(cameraCommandExecutor, 122 previewUpdaterCommand); 123 124 // Resend the repeating preview request when the zoom or flash state 125 // changes to apply the new setting. 126 // Also, de-register these callbacks when the camera is closed (to 127 // not leak memory). 128 SafeCloseable zoomCallback = zoom.addCallback(mPreviewUpdater, MoreExecutors 129 .sameThreadExecutor()); 130 lifetime.add(zoomCallback); 131 SafeCloseable flashCallback = flash.addCallback(mPreviewUpdater, MoreExecutors 132 .sameThreadExecutor()); 133 lifetime.add(flashCallback); 134 SafeCloseable exposureCallback = exposure.addCallback(mPreviewUpdater, MoreExecutors 135 .sameThreadExecutor()); 136 lifetime.add(exposureCallback); 137 SafeCloseable hdrCallback = hdrSceneSetting.addCallback(mPreviewUpdater, MoreExecutors 138 .sameThreadExecutor()); 139 lifetime.add(hdrCallback); 140 141 int sensorOrientation = cameraCharacteristics.getSensorOrientation(); 142 143 ManualAutoFocusFactory manualAutoFocusFactory = ManualAutoFocusFactory.create(new 144 Lifetime(lifetime), frameServer, cameraCommandExecutor, cropRegion, 145 sensorOrientation, mPreviewUpdater, requestTemplate, 146 templateType, new Settings3A(), Executors.newScheduledThreadPool(1), 147 3 /* afHoldSeconds */); 148 mManualAutoFocus = manualAutoFocusFactory.provideManualAutoFocus(); 149 Supplier<MeteringRectangle[]> aeRegions = 150 manualAutoFocusFactory.provideAEMeteringRegion(); 151 Supplier<MeteringRectangle[]> afRegions = 152 manualAutoFocusFactory.provideAFMeteringRegion(); 153 154 requestTemplate.setParam(CaptureRequest.CONTROL_AE_REGIONS, aeRegions); 155 requestTemplate.setParam(CaptureRequest.CONTROL_AF_REGIONS, afRegions); 156 157 mMeteredZoomedRequestBuilder = requestTemplate; 158 } 159 160 public RequestBuilder.Factory provideMeteredZoomedRequestBuilder() { 161 return mMeteredZoomedRequestBuilder; 162 } 163 164 public ManualAutoFocus provideManualAutoFocus() { 165 return mManualAutoFocus; 166 } 167 168 public Runnable providePreviewUpdater() { 169 return mPreviewUpdater; 170 } 171 } 172
