1 /*
2  * Copyright (C) 2019 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 androidx.camera.camera2;
18 
19 import androidx.annotation.RestrictTo;
20 import androidx.camera.camera2.internal.Camera2CameraFactory;
21 import androidx.camera.camera2.internal.Camera2DeviceSurfaceManager;
22 import androidx.camera.camera2.internal.Camera2UseCaseConfigFactory;
23 import androidx.camera.core.CameraUnavailableException;
24 import androidx.camera.core.CameraXConfig;
25 import androidx.camera.core.InitializationException;
26 import androidx.camera.core.impl.CameraDeviceSurfaceManager;
27 import androidx.camera.core.impl.CameraFactory;
28 import androidx.camera.core.impl.UseCaseConfigFactory;
29 
30 import org.jspecify.annotations.NonNull;
31 
32 /**
33  * Convenience class for generating a pre-populated Camera2 {@link CameraXConfig}.
34  */
35 public final class Camera2Config {
36 
Camera2Config()37     private Camera2Config() {
38     }
39 
40     /**
41      * Creates a {@link CameraXConfig} containing the default Camera2 implementation for CameraX.
42      */
defaultConfig()43     public static @NonNull CameraXConfig defaultConfig() {
44 
45         // Create the camera factory for creating Camera2 camera objects
46         CameraFactory.Provider cameraFactoryProvider = Camera2CameraFactory::new;
47 
48         // Create the DeviceSurfaceManager for Camera2
49         CameraDeviceSurfaceManager.Provider surfaceManagerProvider =
50                 (context, cameraManager, availableCameraIds) -> {
51                     try {
52                         return new Camera2DeviceSurfaceManager(context, cameraManager,
53                                 availableCameraIds);
54                     } catch (CameraUnavailableException e) {
55                         throw new InitializationException(e);
56                     }
57                 };
58 
59         // Create default configuration factory
60         UseCaseConfigFactory.Provider configFactoryProvider =
61                 context -> new Camera2UseCaseConfigFactory(context);
62 
63         CameraXConfig.Builder appConfigBuilder =
64                 new CameraXConfig.Builder()
65                         .setCameraFactoryProvider(cameraFactoryProvider)
66                         .setDeviceSurfaceManagerProvider(surfaceManagerProvider)
67                         .setUseCaseConfigFactoryProvider(configFactoryProvider)
68                         .setConfigImplType(CameraXConfig.CAMERAX_CONFIG_IMPL_TYPE_CAMERA_CAMERA2);
69 
70         return appConfigBuilder.build();
71     }
72 
73     @RestrictTo(RestrictTo.Scope.LIBRARY)
74     public static final class DefaultProvider implements CameraXConfig.Provider {
75 
76         @Override
getCameraXConfig()77         public @NonNull CameraXConfig getCameraXConfig() {
78             return defaultConfig();
79         }
80     }
81 
82 
83 }
84