CameraExtensionsInfos.java
/*
* Copyright 2024 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.camera.extensions;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.camera.core.CameraInfo;
import androidx.camera.core.impl.RestrictedCameraInfo;
import androidx.camera.core.impl.SessionProcessor;
import androidx.core.util.Preconditions;
/**
* Utility methods for operating on {@link CameraExtensionsInfo} instances.
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
class CameraExtensionsInfos {
private static final CameraExtensionsInfo NORMAL_MODE_CAMERA_EXTENSIONS_INFO =
new CameraExtensionsInfo() {
};
/**
* Returns a {@link CameraExtensionsInfo} instance converted from a {@link CameraInfo} object.
*/
@NonNull
static CameraExtensionsInfo from(@NonNull CameraInfo cameraInfo) {
Preconditions.checkArgument(cameraInfo instanceof RestrictedCameraInfo, "The input camera"
+ " info must be an instance retrieved from the camera that is returned "
+ "by invoking CameraProvider#bindToLifecycle() with an extension enabled camera "
+ "selector.");
SessionProcessor sessionProcessor =
((RestrictedCameraInfo) cameraInfo).getSessionProcessor();
if (sessionProcessor instanceof CameraExtensionsInfo) {
return (CameraExtensionsInfo) sessionProcessor;
} else {
return NORMAL_MODE_CAMERA_EXTENSIONS_INFO;
}
}
private CameraExtensionsInfos() {
}
}